bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.