bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation and variation trend of groundwater quality in the area around Poyang Lake
Authors: Hu Binlong , Fu Shasha , Zhao Fengyao
Published: May 2021

Aiming to study the current situation and variation trend of groundwater quality in the area around Poyang Lake, the single factor index method was used to systematically analyze 19 indicators of 242 groundwater samples in the study area. Results showed that the overall quality of groundwater in the area around Poyang Lake is poor, with Type III water accounting for 19.01 %, Type IV water accounting for 36.36 % and Type V water accounting for 44.63 %, without Type I and Type II water. The Ammonia Nitrogen index of groundwater in Poyang Lake showed a trend of improvement. The Nitrate and Sulfate index showed a trend of deterioration year by year, on the contrary. And the Hardness, Mineralization degree, Oxygen Consumption and Chloride index showed a trend of stability year by year.
Analysis on the influence of reservoir group on the runoff of Datong station in dry season
Authors: Zeng Ming , Li Jiqiong , Min Yaowu , Yang Shanshan , Li Jie
Published: May 2021

Datong Station is an important controlling station in the lower reaches of the Yangtze River. Analysis on the influence of upstream reservoir group on the runoff change characteristics can provide theoretical support for the utilization and sustainable development of water resources in the lower reaches of the Yangtze River and the Yangtze River Estuary. Based on in-situ observation and mathematical statistics, this paper analyzes the runoff composition of Datong Station and the influence of reservoir group on the runoff of Datong Station in dry season. The main conclusions are as follows: the water inflow from Yichang and above is the main component of Datong Station runoff. The operation of upstream reservoir group adjusts the water inflow distribution of Datong Station to a certain extent. The water replenishing of reservoir group increases the runoff of Datong station obviously from November to March of the following year (dry season), which has a positive effect on resisting the saline water intrusion in the Yangtze River estuary.
Performance evaluation of Tanh and AWBM rainfall-runoff models
Authors: Li Yining
Published: May 2021

The present study compares the performance of two rainfall-runoff models including Tanh model and AWBM model for streamflow simulation. The Tanh model is a 2-parameter empirical model, and the AWBM is a 9-parameter conceptual model. The Tullaroop Creek sub-catchment at central Victoria is selected as the study area. Rainfall and streamflow data measured from the catchment are the major inputs to these models. The Tanh function is used as a simple rainfall-runoff relationship for the Tullaroop Creek catchment and it estimates annual runoff by using curve fitting of the rainfall runoff plot. The AWBM model is calibrated and validated for two periods: 1974-1987 and 1987-2000, respectively. The Nash–Sutcliffe Efficiency is computed to evaluate the efficacy of model predictions. From the results obtained, it is found that the AWBM model can provide adequate estimates of annual runoff at the study catchments than Tanh model.
Finite element analysis of u-shaped reinforced concrete column
Authors: Li Jiuyang , Wang Xiaoyu , Ma Weinan
Published: May 2021

Special shaped column is called frame column with special-shaped section. Under the condition of fully considering the strength and stiffness requirements of the whole structure, the U-shaped column is used in the new structural system of contemporary subway architectural pattern, which mainly uses special-shaped column instead of ordinary rectangular column to form the so-called “explicit frame”, so as to promote the interaction between steel and concrete, and greatly improve the bearing capacity of components power. In this paper, the bearing capacity, bending deformation and failure mode of U-shaped reinforced concrete column are analyzed through the finite element software ABAQUS under the change of wall thickness and height, which provides a theoretical basis for the future research on the performance of U-shaped reinforced concrete column.
Finite Element Simulation of Distressed Prestressed Concrete Cylinder Pipes Embedded in Soils
Authors: Guan Wei , Shang Feng , Nan Li Nan , Yao Meng Lu
Published: May 2021

Durability problems often occur to the prestressed concrete cylinder pipe embedded in aggressive soil environment. The residual performance assessment of damaged pipes is the basis of the maintenance strategy. This study proposes a soil-pipe interaction framework to simulate the limit states of the pipe with path-dependent modelling of each part of the pipe structure, surrounding soil and the contact state between them. Based on the analytical results, the limit states of the pipe can be ranked. Further sensitive analyses showed significance of the nonlinear soil-pipe interactions and the exact deformation is recognized as the aim of the future study.
Research on Application of MMA Super-solid Seal in Preventive Maintenance of Bridge Deck
Authors: Li Tao , Xu Jianhui , Wang Jie
Published: May 2021

In order to solve the problems of minor cracks, insufficient slip resistance, and lightening of the asphalt concrete bridge deck, the self-developed MMA super-solid seal is used to preventive maintenance of Yulong River Bridge and Baisha Viaduct of G65 Yangshuo to Pingle and G65 Guilin to Yangshuo expressways. The road performance of the MMA super-solid seal was evaluated. Engineering application results show MMA super-solid seal has a good preventive maintenance effect. The various road performance indicators (water permeability coefficient, bonding strength, sliding resistance, structural depth, etc.) meet the design requirements. MMA super-solid seal has a short maintenance time and excellent road performance, which is conducive to the sustainable development of road engineering. It can not only guarantee the service quality of the bridge deck, but also prolong the life of the bridge deck.
Research on stability analysis of structural loess slopes based on combined tensile-compression-shear strength theory
Authors: Zheng Wen , Wei Feng , Liu Guangxiu , Wei Jing , Yang Li Gao
Published: May 2021

The long-term stable existence of western high and steep loess slopes is closely related to the special structural properties of loess, and there are often tensile stress areas at the top of the slope. It is important to evaluate the stability of upright slopes by reasonably considering the tensile strength of loess. Based on the combined tensile-compressive-shear strength theory of structural loess, the structural parameter field, displacement increment contour distribution field and small principal stress distribution field law characteristics of an upright slope are analyzed and studied by using the finite method of strength discounting. The results show that when there is no load or constant load on the top of the slope, the structural parameter distribution field and displacement increment contour field of the slope show an obvious “slip zone”, and the “slip zone” becomes more and more shallow with the increase of water content; when there is a uniform load on the top of the slope, the slip zone becomes more and more shallow with the increase of water content. When there is a uniform load at the top of the slope, the “shear zone” becomes more and more shallow with the increase of load intensity, and the surface uniform load intensity is bigger with the same water content, and there is a risk of local sliding; when there is no load at the top of the slope or the load remains unchanged, the small main stress field of the slope has different degrees of tension zone penetration, and the smaller the water content is, the bigger the tension zone is, and the amplitude is also bigger; when the slope has no load at the top of the slope or the load remains unchanged, the small main stress field of the slope has different degrees of tension zone penetration. The smaller the water content is, the larger the tensile zone is, and the amplitude is also large; when there is a uniform load on the top of the slope, the location of the tensile zone on the slope changes, shifting from the original back edge of the slope surface to a certain range on the top of the slope, and with the increase of the load strength, the tensile zone becomes smaller and smaller, and with the increase of the water content, the tensile zone also becomes smaller and smaller.
Research on safety performance of jacking tower under uneven settlement
Authors: Wu Zongming , Chen Kongliang
Published: May 2021

This article takes a 220KV jack-up tower as the research object. By studying the safety performance of the jacking tower under the condition of uneven foundation settlement in the mined-out area, this paper uses the finite element software Midas GTS NX to establish the jacked-up transmission tower-foundation model and the jacked-up transmission tower line-foundation model. Based on the numerical simulation analysis method, the safety of jacking towers under different working conditions is studied.
Disaster Mechanism and Safety Evaluation of Sihong Landslide
Authors: Si-yi Jiang , Hai-liang Li
Published: May 2021

In order to analyze the causes and mechanism of rainfall induced landslide, Taking sihong landslide in guangxi as an example, finite element method (FEM) and the theoretical calculation were adopted, it respectively analyzes the stability of the landslide in the natural state and rainfall conditions, the influence factors of landslide are analyzed and evaluated the landslide stability. The research results show that the disaster mechanism of Sihong landslide is due to the strong permeability of clay layer, and the weathering layer is into water easyly soften, and the rainfall infiltration is easy to form a weak interlayer, which induces local deformation and finally slides. Sihong landslide is in a stable state under natural conditions. However, landslide was in the unstable state under the saturated condition. According to the plastic cloud map of the sliding surface, dangerous area of stress was concentrated in the front edge of the landslide, so it is suggested to take prevention measures of double-row anti-slide piles and the masonry slope. The formation mechanism of the landslide can provide engineering reference for similar project.
Research on the Sustainable Development of Rural Energy-saving Housing in Hebei Region
Authors: Yang Tao , Yao Shan
Published: May 2021

Rural housing construction has become a key target of reconstruction for the current ecological civilization construction for its lacking scientific and reasonable construction guidance, causing serious environmental pollution and waste of resources. The research object in this paper is the rural area of Hebei. The author proposes appropriate design strategies based on the local climate, environment, economic and technical conditions, and provides a reference for the sustainable development of rural energy-saving housing in Hebei.
Analysis of Environmental Protection and Green Ecological Construction in Northwest China
Authors: Chi Sun , Qi Zheng
Published: May 2021

With the rapid development of China’s economy and society, innovative design concepts such as green, ecology and environmental protection have gradually penetrated into all aspects of modern people’s daily life and work. China’s economic development is in a high-speed stage, but in today’s China, the unbalanced development has a long history. At present, under the leadership of President Xi, all aspects have been well planned and governed. The proposal of environmental protection strategy and the construction of green ecological infrastructure have improved China’s overall ecological environment to a certain extent and promoted sustainable development, which is also the best strategic choice to achieve coordinated and sustainable development of economy, society and environment.
Analysis of Runoff Characteristics in Dry Season at Datong Station on the Mainstream of the Yangtze River
Authors: Yan Bo , Lu Zhihua , Li Jiqiong , Huo Junjun
Published: May 2021

As an important control station for the mainstream of the lower reaches of the Yangtze River, studing the runoff change characteristics in dry season at Datong Hydrological Stations can provide a comprehensive grasp of the hydrological conditions in the lower reaches of the Yangtze River. This study uses linear trend method, Mann-Kendall method and wavelet analysis method to analyze the dry season runoff change characteristics at Datong Station, and the following conclusions are obtained: the average flow in the dry season at Datong Station has shown a significant increasing trend and a significant change period, while the first main period is 35-year; for the typical dry months, there is no significant increasing trend in December, but the increasing trend is significant in January and February; The dry season runoff at Datong Station accounted for a significant increase in the proportion of the entire year since 2003.
Suggestions on Improving the Seismic Performance of Portuguese Old ‘Pombalino’ Buildings
Authors: Liu Yinuo
Published: May 2021

There was a destructive earthquake in Lisbon, 1755. After that earthquake people built ‘Pombalino’ masonry building in Lisbon downtown. As time goes by, these buildings need to be reinforced and refitted because of the degeneration of the elements, the requirements for seismic performance and the new functions these buildings should be adapted to. This paper aims to provide some suggestions on how to reinforce the ‘Pombalino’ building and improve the seismic performance. These three suggestions are discussed and concluded by the theoretical analysis of three kinds of reinforcement measures, which include strengthening the connections with FRP elements, pasting carbon fiber sheets to improve the shear strength of masonry, setting laminated rubber pad isolation system to improve the seismic performance and the advantages and feasibility of these suggestions. Considering the advantages of the FRP materials, which are discussed in the following paper, the FRP connecting elements, as well as carbon fiber sheets can be a good choice to replace the aging connecting elements. To improve the seismic performance of this building, laminated rubber pad isolation system can be installed to absorb the energy caused by earthquake and reinforce the degenerated piles footing.
Application Research of Energy-saving Technique in the Buildings Rebuilt Project in Germany Take a kindergarten rebuilding project in Germany as an example
Authors: Xiao Yong , Wang Xudong , Pan Bo
Published: May 2021

In the current situation, building energy-saving rebuilding has been an important part of urban construction. Through analyzing the application of energy-saving technique in old building rebuilding in Germany and particularly introducing one real project in north Germany, Chinese architects should learn some German successful experiments, and devote themselves to the problem of the old building energy-saving rebuilding in our country.
Research on Facade Components Design of Primary School Buildings in the humid tropics Based on Noise Insulation Performance and Natural Ventilation—Take Shenzhen Xinzhou Primary School as an example
Authors: Xiao Y Q , Fang X F , Lu Y , Lin H K
Published: May 2021

As the noise and energy consumption problems in high-density urban development zones become increasingly serious, a structural design based on noise insulation and natural ventilation was proposed by taking the façade design of Shenzhen Xinzhou Primary School as an example. The design and structure of the façade were studied and analyzed, and its actual noise insulation performance and ventilation capacity were evaluated through field measurement. The experimental results testified that the façade could reduce noise by up to 10 dB and the ventilation amount could meet the ventilation requirements of primary school classrooms, which provides guidance and reference for the subsequent design of façades with natural ventilation and noise insulation.
Targets of “Constant-holistic Shadow” Space Based on the Features of Different Requirements of Activities in Hot Summer Regions
Authors: Guohui Luo , Yingqi Liu , Zhaoxian Gong , Yinan Li
Published: May 2021

When participating in the outdoor activities during the sunny and hot days in the regions with a hot summer, people are looking forward to staying in the “constant-holistic shadow” space which is always in shadow during the period of activities. It is necessary to set the targets of “constant-holistic shadow” space differently based on the different temporal-spatial feature requirements of varied types of activities. This paper has qualitatively compared the coupling degree of the three main factors of crowd outdoor activities in summer, analyzed the varied feature requirements of different activity types for the “constant-holistic shadow” space, and discussed the targets and setting methods of “constant-holistic shadow” space of the three typical activity requirements, so as to provide a basis for setting rational targets of the “constant-holistic shadow” space.
Finite Element Analysis of the Mechanical Performance of Reinforced Concrete Beams with different Steel Plate Strengthening Rates
Authors: Li Mingmao , Zou Chuanlong , Chen Shan , Liang Xiaoguang
Published: May 2021

In order to study the effect of different ratios of steel plate strengthening the bottom of reinforced concrete beams on the mechanical properties of the beam, based on the area of the bottom of the beam, various steel plate reinforcement schemes of 25%, 50%, 75% and 100% were designed. ABAQUS is used for static load calculation and comparative analysis with unreinforced reinforced concrete. The results show that : (1) Different ratios of steel plate strengthening the bottom of reinforced concrete beam can improve the bearing capacity of the beam, but the growth of the bearing capacity slows down after the steel plate ratio reaches 75% of the area of the beam bottom; (2) Reinforcing steel plates with different ratios at the bottom of the beam can improve the flexural performance of the beam. It is suggested that the steel plate reinforcement ratio should be selected reasonably in engineering practice.
Mechanical Properties of Recycled Concrete with Crushed Brick Coarse Aggregate
Authors: Liang Xiaoguang , Zou Chuanlong , Chen Shan , Chen Yanyan
Published: May 2021

In order to study the influence of the characteristics of crushed bricks on recycled concrete, the author took the water-cement ratio (W/C) as the design goal, and crushed bricks as coarse aggregates to prepare five groups of recycled concretes with different W/C. After maintenance under standard conditions, used the YE-2000C Pressure Testing Machine to perform a compressive strength test to calculate the compressive strength value. The results shown that: the increase of W/C ratio will reduce the compressive strength of recycled crushed brick concrete. In this test, the strength of recycled crushed brick concrete can vary between 23.13MPa and 35.43MPa; In order to accurately calculate the amount of raw materials, the regression coefficient of the crushed stone in the regulations is not directly used for calculation. In order to give full play to the role of crushed bricks and cement slurry, recycled crushed brick concrete has a suitable range of water-cement ratio. This conclusion provides a reference for the research and application of crushed bricks in recycled concrete.
Study on Conservation strategy of Historical and Cultural Towns and Villages in Southeast Hubei Based on Ecological View
Authors: Wang Qi , Xu Qing , Bing He , Li Rui , Chen Ru
Published: May 2021

Historical and Cultural Towns and Villages are important parts of Chinese cultural heritage. At present, the research on the ecological concept and characteristics of regional Historical and Cultural Towns and Villages is still shallow. This article takes Historical and Cultural Towns and Villages in Southeast Hubei as an example, discusses the location and layout of Historical and Cultural Towns and Villages as well as the ecological characteristics of traditional residential building layout, architectural skills and architectural decoration. Finally, conservation strategies based on ecological concept are analyzed.
Water Quality Monitoring System for Water Distribution Project in Jiaxing, Zhejiang Province
Authors: Jin Xiang , Lin Bai
Published: May 2021

In the construction of water distribution pipeline system in Jiaxing City, in order to monitor the water quality and water environment, a continuous observation network is constructed according to the existing technical specifications. At present, the system runs well and produces continuous monitoring data, which provides basis for local water quality protection.
Study on Stability Analysis and Prevention Technology of Traction Landslide
Authors: Si-yi Jiang , Hai-liang Li
Published: May 2021

Landslides are affected by engineering geological conditions, precipitation and rainfall. It is of greatly significance to study the causes and treatment methods of landslides to prevent and ensure the safety of people’s lives and property. Base on a case of Songmu landslide, the causes and mechanism of rainfall-induced landslide are analyzed. The stability of landslide under natural and rainfall conditions is analyzed respectively by using finite element strength reduction method and standard calculation method. The influencing factors of landslide are analyzed and the safety and stability of landslide are evaluated. The research results show that the disaster mechanism of Songmu landslide is that rainwater penetrates the clay layer, and the weathered layer is easily softened when rain seepage into landslide. The low strength of the soil induces local deformation and finally occurs sliding. In natural condition, the whole landslide is basically stable, but in saturated condition, the whole landslide should be in unstable state. The formation mechanism of the landslide can provide guidance for the prediction of the landslide deformation and treatment in the future.
A kind of anchoring foundation with multi bucket embedded when penetrating into seabed
Authors: Liu Jinlong , Zhu Lei , Yao Jun , Xiao Yun
Published: May 2021

The construction of anchoring foundation in ocean engineering depends on construction equipment. Among them, bucket foundation is a convenient and fast construction tool for marine anchoring foundation. But at present, many kinds of anchoring foundations based on bucket foundation construction have their own limitations. In this paper, a new type of bucket foundation based on bucket foundation construction is proposed, which is composed of multiple buckets, after deployment in the seabed, each bucket is connected based on the anchoring hole, and the attitude of each bucket is not the same, which can maximize the friction with the seabed soil, thus improving the overall uplift capacity.
Calculation of stability reliability of soft base controlled unstable rock and parameter sensitivity analysis
Authors: Wang Lei , Wang Wei , Qi Yu-na , Su Zhan-dong , Shen Chao
Published: May 2021

There are a large number of unstable rocks whose stability are controlled by soft base layer in the mountainous areas of southwest China, and they have caused serious harm to people’s lives and local economic development. Therefore, it is of great practical significance to study the stability and failure mechanism of such unstable rock. Taking the in Wulong District, Chongqing as an example, this paper analyzes the failure probability and reliability index of the unstable rock under different conditions by use of Monte Carlo method and on this basis, the sensitivity of the stability of dangerous rock mass to the main influencing factors is analyzed. The results show that the stability coefficient, failure probability and reliability index of are equal to 1.151, 26.245% and 0.642 under natural condition. However, the stability coefficient of decreases rapidly and the reliability index and failure probability increase obviously when combined with other factors such as rainfall or earthquake. The sensitivities of the influencing factors of the unstable rock are from top to bottom internal friction angle of soft layer, the horizontal seismic force, the cohesion of soft layer, the water content in the crack and the weight of soft layer. The research results can provide some reference for the stability analysis and engineering prevention of such unstable rocks.
Investigation of self-healing properties of dense-graded asphalt mixture containing microcapsule
Authors: Tang Zhennong , Hu Yonglin , Hua Wenlong
Published: May 2021

To study the self-healing performance of the asphalt mixture with microcapsules and its influencing factors, this paper uses high-pressure water penetration test to evaluate the selfhealing performance of the microcapsule asphalt mixture, and studies the influence of microcapsule content, mixture properties (mixture type, maximum nominal particle size, porosity, asphalt type and amount) and use environment (self-healing temperature and time, moisture) on the self-healing performance. The results showed that as the amount of microcapsules increased, the self-healing effect increased first and then decreased. The optimal amount of microcapsules was determined to be 6%. In terms of the properties of the mixture, the self-healing effect of the suspension dense gradation is better than that of the skeleton dense type, and the matrix asphalt is better than the modified asphalt. The smaller the nominal maximum particle size and porosity are, the better the self-healing effect is. In external conditions, the temperature is conducive to the self-healing of the mixture within a certain range. The selfhealing performance increases nonlinearly with the healing time, and the moisture is not conducive to the self-healing of the asphalt mixture cracks.
Finite element analysis of island excavation process of foundation pit
Authors: Yu Changyi , Long Jie , Lu Mingyue
Published: May 2021

In the construction of foundation pit, island excavation is suitable for large-scale foundation pit because of its high speed, but it requires a higher support system. In this paper, finite element simulation is carried out for the construction process of island excavation of deep foundation pit with double-ring beam support system. The simulation process considers the construction process of island excavation and step-by-step support, and obtains the displacement field of soil around the foundation pit along with the construction progress. It provides effective guidance for the safe and smooth development of foundation pit engineering, and provides reference methods for similar engineering analysis.
Bridge health monitoring and evaluation system
Authors: Yang Xiaotong
Published: May 2021

To understand the health status of the bridge, this paper explores how to use the bridge health monitoring and evaluation system for bridge health monitoring, management, and evaluation. It also expounds in detail the role of other subsystems. In this system, a sensor system can monitor the bridge in real time to obtain the basic data of the normal operation of a bridge. At the same time, the daily manual inspection work is carried out. We will receive data through the data collection, transmission, and processing subsystem for the next operation. Finally, the evaluation subsystem can use the data to carry out a series of calculations and analyses, and then the bridge health status score can be obtained.
Research on the mechanical properties of composite admixture concrete
Authors: Li Yongwen , Zhang Yongping , Li Zaibo
Published: May 2021

The effect of high-efficiency composite activator on the working performance and mechanical properties of composite admixture concrete composed of steel slag (SS), blast-furnace slag (BS) and fly ash (FA) were studied in this paper. Results show that: the use of composite activator has no adverse effect on the working performance of fresh concrete; the effect of composite activator on the improvement of the compressive strength of C30 is obvious, while the effect on C50 concrete is weakened. The reason is that when the cement content per unit volume of concrete is high, cement has a certain inhibitory effect on the hydration of steel slag in the early stage.
Experimental study of flocculant dosage on improving paste permeability
Authors: Yong Cao , Sheng-hua Yin , Yong-qiang Hou
Published: May 2021

Based on the permeability characteristics of tailings paste storage and industrial application scenarios, this paper takes a nickel tailings as the experimental object and uses variable water head penetration experiment to measure the permeability rate of tailings paste with concentrations of 66%, 68% and 70% respectively, and the dosage of flocculant is 15g/t, 20g/t, 25g/t, 30g/t, 35g/t and 40g/t. The research results show that the order of permeability rate of tailings paste with different concentrations is 15g/t < 25g/t < 20g/t < 30g/t < 35g/t < 40g/t, which indicates that the amount of flocculant can improve the permeability characteristics of tailings paste, and provides a theoretical basis for the development of paste storage technology in rainy areas.
Comparison of Calculation Methods for Cracking Width of Recycled Aggregate Concrete Beam Under Short-term Loads
Authors: Wang Yuying , Tang Jiajun , Zhao Qingming
Published: May 2021

In order to study the formula for calculating the maximum crack width of recycled aggregate concrete beams under short-term load, four methods of calculating the maximum crack width in the existing literature were compared and analyzed through examples. The results show that Yin Lei’s calculation method based on bond-slip theory has smaller error and lower data dispersion. The calculated value of the formula agrees well with the experimental value, which can better meet the requirements of safety, applicability and durability.
Stability analysis of temporary cofferdam of a ship lock construction project in coastal area
Authors: Yuan Fanglong , Chen Wei
Published: May 2021

The determination of the structural type and location of the cofferdam is the key to the design, and the stability of the cofferdam is the premise to ensure the subsequent construction. Based on the actual project, the stability of the existing cofferdam during the foundation pit dewatering is tested and studied on site, the safety coefficient of the cofferdam is given by using the foundation calculation software of port engineering, and the specific position of the potential slip surface of the foundation is determined, finally, the optimal design and stability analysis of the current cofferdam structure are carried out, the results show that: the cofferdam has the problem of leakage, so the corresponding water isolation measures should be taken, and the foundation pit dewatering causes large horizontal displacement of the foundation, the sliding failure surface occurs in the muddy clay layer; the cofferdam has instability and leakage problems, in order to meet the safety of later construction, the structure of the cofferdam should be optimized; combined with the distribution law of the failure surface of foundation slip, the optimization scheme of driving steel sheet pile in the inner side of cofferdam core soil is put forward; it is verified that the steel sheet pile cofferdam can meet the stability needs of foundation pit during dewatering and after excavation, which is a reasonable and effective support scheme.
Real time Localization Method Research with Monoslam and BIM Model
Authors: Shan Shaosheng , Xu Dan , Gong Jian
Published: May 2021

Outdoor navigation technologies based on GPS and Beidou has been very mature. However, due to the weakness of satellite signal and refraction, they can’t satisfy the needs of indoor localization and parking area navigation in large commercial buildings. Most indoor localization technologies, such as Bluetooth and Wi-Fi, are based on active equipment. Due to the implementation cost, they can’t be widely deployed. In recent years, SLAM has been greatly developed and applied in the field of robotics and autonomous driving. For technologies such as stereo SLAM and Lidar SLAM require additional equipment, and meanwhile large scale computing will happen during point cloud matching, they are not suitable for civilian mobile usage. Considering the BIM technology, which can provide accurate 3D data of buildings, are widely used gradually, a real-time localization method combining monocular SLAM and BIM model is proposed to complete vision-based initial localization. First, we create the BIM model with the design drawings, extract the visible edge lines of model, and establish a 3D line feature database; then, intercept the key frames of the mobile camera, and extract the edge line and line feature descriptors from image, match the line features between key frames, triangulate the matched line segments, get the 3D line coordinate in first frame, mistake filter will be rolled out between multiple frames; finally, match the reconstruction result with line feature database form BIM model, register the initial position. This method can quickly and effectively perform the registration of monocular images and BIM models, get the initial position in complex spaces, and support the application scenarios such as indoor navigation, equipment maintenance, facility management, and construction monitoring.
Research on Dynamic Structure Displacement Monitoring Based on Feature Optical Flow Method
Authors: Zheng Jiayan , Wang Yuzhou , Pan Fei , Zhou Zhixiang , Li Qiumo , Xu Chao
Published: May 2021

In view of the difficulty of sensor installation and complicated process in traditional structure health monitoring, a feature point monitoring based on optical flow is proposed in this paper. A high-speed camera is applied to capture the dynamic response of the structure under excitation, and feature point could be selected and marked at any position in the video. The movement of the selected point could be traced and calculated by feature optical flow method, and the displacement time series of the feature point could be obtained. Results show that the displacement time series obtained from proposed method in this paper is consistent with the data of the pull-wire displacement sensor, the maximum displacement error is 3.3%, the method proposed is more flexible, convenient and of low cost.
Study on the coseismic displacement field of the 1999 Chi-Chi earthquake based on strong motion data
Authors: Zhihui Deng , Haiyun Wang
Published: May 2021

The Whitney (2018) linear baseline correction method is used to analyze the near-fault strong motion data of the 1999 Chi-Chi earthquake and quickly calculate the co-seismic displacement. The feasibility of this method is verified by comparison with the coseismic displacement data of adjacent GPS stations. The results show that the coseismic displacement of the hanging wall is significantly larger than that of the foot wall, and largest displacements reached 707.0cm north and 369.7cm up respectively, and occurred at the hanging wall station TCU052. The results in this paper can provide references for the rapid identification of coseismic displacements using strong motion data.
Application of New Chinese Style in Interior Design--Take the Cultural and Creative Museum of the Palace Museum as an Example
Authors: Yin Zhang , Ruishuang Xu
Published: May 2021

The new Chinese style in interior design is a kind of interior design style that inherits the traditional Chinese culture and interprets the traditional modernization. The concept is based upon traditional Chinese cultural ideas and expressed through modern design. On the basis of the design characteristics and innovation of the new Chinese style of the Palace Museum, this paper briefly analyzes the design essentials of the new Chinese style and its integration with modern elements. It is expected that the new Chinese style will have better development in the future, and be able to better inherit Chinese traditional culture and make innovations.
Research on key parameters of water mist fire protection in ship cabin
Authors: Fang Tang , Guofeng Chen , Pan Li , Jian Yu , Jianghui Xie , Xiaodong Wang
Published: May 2021

Because of good cooling, heat absorption, attenuation of heat radiation and other functions, water mist is especially suitable for ship fire extinguishing and cooling. The CFD software is used to simulate water mist fire extinguishing and cooling in a ship cabin under the condition of six different parameter combinations. When the grain size is less than 150μm, the cabin temperature can be reduced to 25°C in three minutes after water mist intervention. The larger the flow rate, the smaller the grain size, the faster the cooling rate. Fire extinguishing efficiency test of water mist in small scale ship cabin is carried out. The result shows that water mist with grain size of 100μm-150μm can quickly extinguish fire and reduce cabin temperature to 25°C in two minutes.
Parametric Study on the Comfort of Outdoor Wind Environment of Traditional Dwelling-----Taking Lius’ courtyard in Kaifeng As an Example
Authors: Liang Chunhang , Yu Lu , Liu Xiaojun
Published: May 2021

In order to interpret the design wisdom of traditional dwellings in Kaifeng from a quantitative point of view, computational fluid dynamics technology is used to simulate the wind environment of traditional dwelling in Kaifeng in winter and summer. Parametric studies of three important architectural design elements on the traditional dwelling is quantitatively conducted. The quantitative design strategies for the traditional dwelling conforming to outdoor wind environment is obtained, which can be used to help local architects better understanding the traditional architectural wisdom and to guide design practice wisely in Kaifeng.
Application Analysis of BIM Technology in Green Intelligent Building Design
Authors: Rui Wang , Qianyi Zhu
Published: May 2021

With the rapid development of science and technology as well as the progress in the social economy, the urban construction has accelerated significantly, and a large number of people have poured into the city, resulting in a certain degree of deterioration of the urban environment. The concept of sustainable development put forward by the Chinese government is to use more environmentally friendly materials during construction. In this way, the material consumption and environmental pollution during construction can be reduced in order to improve the living environment of residents, and promote the efficient use of overall resources. Through the sustainable use of overall resources, it can lay a good foundation for the subsequent development and construction of cities, thereby promoting the parallelism of urban construction and environmental protection. In this case, the application of BIM technology for the design and construction of green and intelligent buildings is of great significance to the field of contemporary architecture.
Application of Lianas in Vertical Greening Landscape of Xi’an City
Authors: Han Lu
Published: May 2021

Vertical greening serves as one of the important forms in enriching urban landscape. In this paper, the writer investigated the liana landscape in eight parks of Xi’ an and the matching types of several landscape elements (architecture, gallery, trellis, courtyard, flower rack, porch, highway, railway), discussed the common lianas in this city, and evaluated the landscape effect of lianas with different landscape elements by using scenic beauty method. How to better use lianas for landscaping plays a significant role in vertical greening landscape construction of Xi’ an City.
Integrating The Bio-digital Aesthetic Value and Architecture Potential of RLP-Concrete 3D Printing Technology
Authors: Li Chenshu , Zhou Xiaoyan , Liu Xiangyu
Published: May 2021

Rapid liquid printing (RLP) is a new research direction for 3D printing technology holding great promise for the field of architecture. It boasts an environmentally friendly, personalised free form mode of printing which is able to produce complex structures with ease. This paper explores recent research into the use of rapid printing technology in architecture and the bio-aesthetic value of its own properties. We have experimentally investigated the materials and techniques required for rapid liquid printing on concrete, with complicating issues pertinent to the printing system identified. A suitable digital design language was investigated following completion of the research. The combination of rapid liquid printing technology and concrete breaks away from the single research direction of 3D printing technology and moves the academic literature towards focusing on biomaterials in ecological architecture fields. Finally, we explore design systems for spaces dominated by collaboration between non-human bodies. The simulation and feedback of specific environments and the cooperation of 3D printing technology create a new and extended space of possibility between nature and architecture.
Study on protection strategy of traditional village cultural heritage in Internet Era
Authors: Sui Yanhui , Zhang Jian
Published: May 2021

With the advent of the Internet Era, conservation of traditional village cultural heritage is bound to face many new problems. This paper analyses the direction of “Internet” and “Cultural Heritage” of traditional villages in the strategic level of Rural Revitalization in recent years, and concludes that the impact of Internet on traditional villages is mainly reflected in cultural heritage tourism, utilization of local architectural heritage, heritage industrialization, spatial pattern and digital protection. However, many problems still exist, such as imperfect theoretical system, inaccurate function orientation and irrationality protection. In the future, the study of the “Internet +” mode of sustainable development of traditional village cultural heritage in Rural Revitalization Strategy should focus on establishing scientific research paradigm, guiding the rational positioning of the Internet, digitalizing protection, dissemination and evaluation of traditional village cultural heritage based on national image building and cultural competitiveness, and establishing personalized response strategies according to local conditions.
Study on Gas Comprehensive Control Technology in Steep and Extra Thick Coal Seam
Authors: Mu Chunming , Liu Yongsan
Published: May 2021

In order to improve the gas drainage amount and drainage rate of steeply inclined and extra thick coal seam and realize the safe and efficient mining of coal mine, the distribution and evolution law of surrounding rock stress field and fracture field of horizontal slicing mining face in steeply inclined coal seam were revealed by using numerical simulation method, and the gas flow process and law from lower pressure relief gas to slicing mining face were analyzed The comprehensive control measures of the combination of pressure relief gas interception and drainage and buried pipe drainage in the goaf of this layer have realized the effective gas control of the mining face in the mine production process. The research results play a typical demonstration role for the comprehensive control of rock burst and gas in steep and extra thick coal seam in Xinjiang and even in the whole country, and have promotion significance.
Research on Red-Bed Soft Rock Engineering Properties and Foundation Appraisement of Construction Engineering in Guangzhou
Authors: Xie Xiaorong , Su Dingli , Li Xiang , Hu Hesong
Published: May 2021

Based on the methods of geological drilling, literature research, induction and statistics, the site investigation of an old industrial park reconstruction project in Haizhu District of Guangzhou city was completed. The landform, formation lithology, structure and hydrogeological characteristics were systematically identified. Combined with indoor test and in-situ test, the variation rules of physical and mechanical parameters of argillaceous siltstone with different weathering degrees in the site were analyzed, and the evaluation results were given. The engineering suitability and the foundation stability are evaluated. The results showed that the weathering of soft rock makes the statistical standard values of compression coefficient, compression modulus, direct fast shear cohesion and internal friction angle of rock and soil decrease. Under the saturated state, the average value of strongly weathered argillaceous siltstone is 1.51 MPa, and that of moderately weathered argillaceous siltstone is 6.2 MPa. The strength of soft rock is low after softening with water, and the differential weathering of rock mass is strong. There are great differences in rock strength, local differences between fully and strongly weathered rock surfaces, and great changes in thickness. The weathering is extremely heterogeneous, in which the influence of structure, lithology, fissures and groundwater played a key role. The foundation is generally in a stable state, and the site is suitable for the construction of the project. The research results can provide reference for similar geotechnical engineering investigation and design.
Wireless Monitoring System of Super-long Pile Foundation in Bridge Engineering
Authors: Sheng-fang Qiao , Hang Chen , Meng-xiong Tang , He-song HU
Published: May 2021

The load-carrying properties of super-long pile were important to bridge engineering in construction and operation phases, however, the research of its load-carrying properties was imperfect. The wireless monitoring system of super-long pile foundation in bridge engineering was presented in this paper. The intelligent vibrating wire steel stress gauges were used to reflect the axial stress of pile foundation, then the sensor data was acquired using wireless intelligent acquisition instrument. The LoRaWAN was used to establish the local area network, which was long range wide area network. Thus the monitoring data of each sensor was collected by Lora modules. Furthermore, the collected data was uploaded to the cloud platform using 4G wireless communication technology. Finally, the wireless monitoring system was applied in actual bridge engineering. The results indicated that the change of monitoring data was synchronized with the progress of actual working conditions, which could reflect the dynamic process of construction to a certain extent. It could provide an important reference for similar projects in the future.
Research on Simulation Technology of Highway Traffic Organization Based on BIM Technology
Authors: Chaoming Chi , Peng Dong , Qiang Zhao , Xin Yan
Published: May 2021

This paper mainly studies the joint application about BIM technique and three-dimensional (3-D) simulation of traffic organization. It is the first time to systematically break through the application bottleneck of BIM technology in traffic organization design and implementation of highway reconstruction and expansion project, which realize the vertical connection between BIM software and 3-D simulation of traffic organization data to the visual evaluation of traffic conditions by analyzing the visual electronic sand table. An interconnection between 3-D visual simulated data flow and Vissim transportation analysis data is also built up to highly restore the real traffic conditions under the implementation of traffic organization plan, which help us evaluate road capacity of diversion section, provide a guidance to design and implement the transportation proposal, and improve the efficiency of implementation.
Application of dynamic replacement & mixing method for Sabkha treatment
Authors: Wang Weizhi , Ni Zihao
Published: May 2021

For ground improvement of weak material, a developed method from dynamic replacement named dynamic replacement & mixing was applied on red sea village development project located in Jeddah, KSA. Test results revealed such method obviously improved the property of intermediate soil compared to traditional dynamic replacement.