bluuebunny/crossref_metadata_2025 huggingface dataset:
A new type of PHC pile-sinking technology: Drilling with PHC Pipe Cased Pile and its development directions
Authors: Hou Zhenkun , Tang Mengxiong , Hu Hesong , Lin Zegeng , Chen Yining , Zhao Shiyuan , Zhang Shuo
Published: November 2020

Pile foundation has unique advantage in reducing the settlement of the upper structure and improving the foundation bearing capacity, while Drilling with PHC Pipe Cased Pile (DPC Pile) is a newly developed non-extruded soil PHC tubular pile which integrates drilling-pile sinking-dumping simultaneously to solve the pile sinking problem of large diameter (800 ∼ 1400mm) pipe pile. It solves the problem of pile sinking caused by large pile diameter or hard soil layer, breaks the situation that the pipe pile foundation can only be limited to small diameter and size, and broadens the applicable scope of engineering geology of pipe pile. It realizes the full rock-socketed of the pile tip (which can enter the middle and weak weathering stratum), improves the bearing capacity of single pile, and gives full play to the advantages of pipe pile material with higher strength. It has little damage to the pipe pile and little noise, being relatively environmentally friendly, as well as plays a major demonstration role in leading the new direction of the development of green, energy-saving and environmental protection pile foundation, conforming with the advanced development trend of upgrading traditional advantageous industries to high-tech manufacturing and construction technology with promising market.
Research on the Incremental Cost and Benefit of Green Building Based on the Whole Life Cycle
Authors: Wang Bin , Luo Lei , Wang Feiran
Published: November 2020

With the continuous development of the global economy, environmental and resource problems have become more and more serious, and sustainable development has become an inevitable trend. Among them, green buildings are a new type of industry in the construction field, which can avoid serious pollution problems. Based on previous work experience, this article summarizes the constituent elements of the incremental benefits of green buildings. The author discusses the incremental cost analysis from the following five aspects. They are the decision-making phase, the design preparation phase, the construction phase, the maintenance operation phase, and the demolition and recovery phase.
Application of BIM Technology in Freezing Design of Metro Section Lateral Pump House
Authors: Song Ao , Cai Fu , Lei Wang
Published: November 2020

With such characteristics as deep buried, complex geological conditions and sensitive surrounding environment, a metro section lateral pump house in Zhengzhou is conducted using horizontal ground freezing reinforcement method within metro tunnel, combined with mine excavation and lining. In order to ensure the expected effect of freezing reinforcement, BIM technology is applied in layout test of freezing holes. A 3D parameterized freezing pipe model adapted to stakeout data is build, and mathematical relationship of main model parameters is obtained. The rationality of freezing hole layout is verified through collision detection analysis and formation prediction analysis of frozen soil wall, providing reference for application of BIM technology in freezing design of complex cross passage.
Research on application of building information management technology to engineering project management
Authors: Ma Chongsen , Yang Denglian , Ma Kexin
Published: November 2020

as the construction industry develops, the scale and complexity of construction projects increase as well. Clients are having higher and higher requirements for management levels and quality of the projects, and the traditional extensive management modes no longer meet the needs of the modern construction industry. Meanwhile, the management expertise directly influences a construction company’s development, and introducing building information management (BIM) technology into construction projects cannot only improve the construction management, but promote efficiency and intensive development of construction companies. This paper probes into the application of BIM technology in construction and its impact, with a vision to provide some reference for future projects.
Analysis on the Reliability of Coastal City Transportation from the Perspective of Resilience: A Case Study of Yantai City, Shandong Province, China
Authors: Meng Wei
Published: November 2020

As the global climate continues to change and environmental damage has intensified, it has seriously affected the safety and sustainable development of coastal cities. Improving the resilience of coastal cities has become their strategic consensus to respond to changes. Based on the theory of resilient cities, using complex network analysis methods and taking reliability analysis as the starting point, a coastal road resilience evaluation system was constructed, and the impact analysis and resilience evaluation were carried out using Yantai City as an example. The results show that: 1) Yantai municipal road network (national and provincial road) has high reliability and strong robustness; 2) the network has important road sections with greater influence. Based on this, this article proposes strategies for improving urban resilience.
Spatial distribution characteristics of Foreign Customs Districts in Kwangtung (Guangdong) Province based on geographic information system (1842–1949)
Authors: Liu Qionglin , Chen Yuhua , Chen Siyi
Published: November 2020

The Foreign Customs Districts in Kwangtung (Guangdong) Province were spatial areas under the customs business jurisdiction established on the basis of location. Such Districts were under the Commissioner of Chinese Maritime Customs during 1859–1949.Since then, the number of Foreign Customs Districts had grown from two in the late Qing Dynasty to 11 in the Republic of China, which accounted for nearly half of the Chinese Maritime Customs Districts (19).They also gradually developed a vertical spatial pattern system, which was composed of three levels, namely, the head office, sub-offices and barriers. This thesis analyzes the characteristics of the spatial distribution of the Foreign Customs Districts, which are located at the junction of China’s land and sea resources by mathematical graph analysis methods, such as kernel density estimation, geographic concentration index, and imbalance index method. The study aims to provide a case study of the spatial structure of the Foreign Customs Districts in the modern Chinese reference.
Concrete seismic configuration and detailing comparison between China and Sri Lanka
Authors: Ding Zhiquan , Fu Jinxi , Yu Bilong
Published: November 2020

With the implementation of the “One Belt One Road” strategy, more and more Chinese companies are taking part in the engineering market in Sri Lanka. As BS codes are applied locally, concrete seismic configuration and detailing are different from Chinese ones. Therefore, the authors summarized the differences of planar and vertical irregularities, material properties and stirrups, column and beam between RDMSE and GB50011 to provide easy reference for engineers who are going to do projects in this country. It can be found that generally the planar and vertical irregularities are similar but the GB50011 have more detailed requirements; the steel strength and its elongation are similar in the two codes; column’s axial compression ratio limit in RDMSE are 44% lesser than the one in GB50011; and beam’s maximum reinforcement ratio in RDMSE is 20% lesser than the one in GB 50011.
Research on Simplified Modeling of All-steel Buckling-restrained braced frame
Authors: Zhang Xu Yang , Hong Ping
Published: November 2020

Buckling restrained brace is an excellent shock-absorbing and energy-dissipating component, which is often used in frame structures. The buckling restrained brace frame system includes beams, floors, columns, and bracing members. In the finite element analysis, there are highly nonlinear problems in concrete structures and supporting members. The calculation efficiency is low. In order to optimize the finite element analysis process of the structure, this paper uses a simplified model based on the core material constitutive model and equivalent stiffness. Through the comparison between the original model and the simplified model, it is found that the inter-layer displacement is basically consistent with the maximum error of about 5%, and the calculation efficiency is improved by about 65 times.
Deformation Monitoring and Simulation Analysis of Deep Foundation Excavation Construction for subway station
Authors: Wang De-Yong , Wu Kunpeng , Wang Jing , Deng Kai-Fang
Published: November 2020

Based on the excavation of deep foundation pit near water for subway, retaining structure of the foundation pit and its deformation monitoring program were designed; in-situ monitoring data of the retaining structure deformation in the foundation pit were analyzed. The horizontal deformation of the retaining structure changing with the excavation depth and time were carried out. 3D finite element model was built to simulate the do construction process of the station foundation pit; FEM results and in-situ monitoring results of retaining structure deformation were compared. The results showed that: the retaining form with steel support and supporting pile had good limit to the lateral deformation of the foundation pit soil. The results calculated by FEM were consistent with the in-situ monitor results; according to monitoring data and the results of numerical simulation, the next deformation law and maximum deformation of the foundation pit excavation were predicted, which showed that foundation pit retaining structure design was reasonable and safety. The simulated results provide valuable reference for these similar engineering.
Research on Application of Ground Penetrating Radar in Detecting Underground Void Areas and Pipelines
Authors: Chen Zhijun
Published: November 2020

With the development of the urban process, the demand for pipeline detection in urban underground vacant areas is becoming more and more urgent. This article attempts to use geological radar detection methods. First, FDTD forward simulation is performed on common underground vacant areas and pipelines to analyze electromagnetic wave propagation and imaging Characteristics, and finally select the site where the water channel is buried for on-site measurement; the results show that the geological radar evacuates the underground, the pipeline detection effect is obvious, the on-site measured image signal is greatly disturbed, and the simulated vacancy zone and pipeline signals are simulated The original feature can provide positive help for the discrimination of the measured image. Similarly, the inversion of the measured image can improve the accuracy of the discrimination.
A prediction model of ground vibration considering the local amplification of vibration
Authors: Zhao Hong , Zhou Ming , Yang Fulian , Dong Wenxiu
Published: November 2020

The ground environmental vibration caused by traffic load will attenuate monotonously with the increase of the distance from the load source. However, considering the complexity of stratum factors, the attenuation of ground vibration will have local amplification of ground vibration instead of monotonous attenuation. This article is based on RBF neural network. The method can predict the ground environment vibration of the local amplification phenomenon of the ground vibration. This paper selects the theoretical solution of the complex theoretical model to perform the fitting approximation and the numerical approximation with the measured discrete data. The results show that the numerical approximation is better. Since the RBF neural network does not require other neural network models to perform supervised learning training, the numerical convergence speed is also relatively fast.
Urban micro-space reconstruction strategy
Authors: Ning Qi , Jie Cheng Wen , Xue Wang Ming
Published: November 2020

With the rapid development of China’s economy and society, people’s living standards have been gradually improved, domestic urban motor vehicles into the high-speed development period, the rapid growth of urban traffic demand, “difficult to travel”, “difficult to park” has become a common traffic phenomenon. Based on the discussion of the strategy of urban micro-space reconstruction, this paper deeply discusses the planning and promotion of urban parking space, aiming to solve the “travel difficulty” and “parking difficulty” of the city and improve the overall image of the city.
A numerical investigation on the seismic isolation effect of flexible wooden cushion
Authors: He Yunong , Li Tieying
Published: November 2020

This paper proposes a finite element simulation of wooden structures with flexible cushion. Applied with different loads, the seismic isolation effect of the cushion is analyzed. By changing the thickness and elastic modulus of the cushion, the dynamic effect of the cushion under various conditions was analyzed. The Pi theorem is used to obtain the non-constant parameter that affects the vibration isolation result.
Research on the detection and secondary utilization of the old piles of the re-building wharf at the original site
Authors: Liu Tianyun
Published: November 2020

According to the test results of the appearance deterioration degree, concrete strength, reinforcement strength and pile foundation integrity of the old square piles of the original wharf, it is confirmed that the old square piles still have good performance and bearing capacity which can meet the requirements of the temporary support of the construction steel platform of the new wharf piles, and the old square piles have been successfully secondary used in the construction of the new wharf.
Effect of Transverse Damage on Transverse Load Distribution of Bridge Side Beam under Moving Load
Authors: Du Wei Qiang
Published: November 2020

In order to study the variation of transverse load distribution of T-beam bridge with transverse damage under moving load. In this paper, nine kinds of working conditions are proposed for the possible failure modes and the different locations of the failure, and relevant finite element models are established. Through simulation, the lateral load distribution of middle beams under nine working conditions is obtained and compared with that under non-damage condition. The results show that the transverse load distribution capacity of T-beam bridge under moving load will be greatly affected after the transverse connection damage of the diaphragm beam occurs. When the location of transverse damage is different, the influence of T-beam bridge will be different.
A Brief Analysis of the Memorial Space Design of the South China Education History Pingshi Research Base
Authors: Shi Ying , Xu Si Lin , Pan Ying
Published: November 2020

Through literature and the public, this article had in-depth understanding of the historical events of South China education and followed three design principles of memorial space: respect for history, emotional resonance and sustainable development. Then this article had overall planning and landscape nodes design for the South China Educational History Research Base, realized the historical information spatialization, inherited and carried forward the spirit of patriotism, so that more people could recognize and remember this history. This article through analyzed and concluded the 4 design methods of the Research Base project as following: narrative, symbolism and metaphor, white space and public participation, which can provide a certain reference for the design of memorial space in the later stage of the project and other similar projects.
Jacking Force Estimating and Site Measured Data Analysing of a complex Curved Long Distance and Large Diameter Pipe Jacking
Authors: Zhan Yuan , Chen Xiaoxiang
Published: November 2020

This paper presents the jacking force estimating and the measured data analysing of a 3D curved, 413 meters long distance and 3.8 meters external diameter jacking project. The jacking load consists of the face load and friction resistance, and it is influenced by many factors. The widely used estimated method include Chinese cord method, Japanese method and German method, and they all have application conditions, which make them have limitations for engineering application, especially the friction resistance factors are offered by a wide interval. The jacking loads are calculated by the above estimated methods in a 3D curved, 413 meters long distance and 3.8 meters external diameter jacking project, 3 intermediate jacking stations are set according the calculation result. According by the site measured datum in the construction procedure, the composition of the jacking load and its relationship with the jacking distances and the curve radius are analysed, and the frictional residence factors in clay are provided on the class by straight line and curved lines, which provide a basis for similar engineering.
Review of Research on Damage Identification of Reinforced Concrete Structures Based on Acoustic Emission Technology
Authors: Guo Binyao , Li Yixuan
Published: November 2020

This paper summarizes the application of acoustic emission technology in the identification of concrete damage. It reviews the application of acoustic emission technology in the identification of the damage of concrete structure, including the characterization of acoustic emission of concrete structure damage and the application of acoustic emission technology in research of concrete fatigue performance in concrete. Besides, the review of the application of acoustic emission technology on steel corrosion researches is presented, as well as the application of acoustic emission technology in the identification of concrete damage under high temperature and freeze-thaw cycles. The aim of this paper is to provide a systematic reference for relevant researchers.
Key technology of distributed temperature field monitoring system based on single bus
Authors: Wu Tao , Zhou Xiaomin , Li Sen
Published: November 2020

In the artificial stratum freezing method construction, the stratum temperature is an important basis for judging the thickness, strength and stability of the frozen wall. The temperature of the circulating return brine is an important indicator reflecting the state of heat exchange between low-temperature brine and the stratum. Due to the large number of temperature measurement points, long measurement distances, and relatively scattered positions in the freezing project, this paper uses a single-bus temperature measurement technology to develop a monitoring system based on high-performance microcontrollers and distributed digital temperature measurement cables on the hardware. Combined with LabVIEW software, the real-time collection and monitoring of temperature data is realized.
Stress Analysis of Extra-high Arch Dam with Closed Arch Grouting during Summer Constructions
Authors: Shi Li , Huang Peng , Zhang Ying , Di Shengjie
Published: November 2020

In this paper, the stress state of the summer arch grouting area of the extra-high arch dam is studied to determine how the summer arch grouting will affect the dam body, considering the dead weight, water pressure, temperature and other loads. The results show that the most unfavourable working case after considering the dead weight and water pressure of the arch dam is that no water storage in the winter. The upstream arch direction should consider a certain amount of tensile stress superimposed by the dead weight and water pressure. The high stress of the surface concrete in the closed arch grouting area in summer may cause the strength of the transverse joint to reopen after grouting. After the transverse joint pulled apart, the arch stress in other parts is released.
A three-dimensional limit equilibrium method for analysing the basal upheaval stability of deep slender foundation pits
Authors: Wang Chenghua , Li Yajie
Published: November 2020

Deep slender foundation pits, which are of small plane dimensions and deep retaining structures, have been increasingly used in engineering practice. Spatial effects of this type of foundation pits are obvious, but the existing stability analysis methods are not suitable for such deep foundation pits. Therefore, three-dimensional basal upheaval stability analysis methods considering the spatial effect are badly needed. On basis of former tests and numerical solutions, a new model of upheaval failure for deep slender foundation pits was suggested by application of the limit equilibrium technique for entire foundation pits, considering the influences of spatial effects of the retaining structures. A global factor of safety against upheaval instability was defined and the applicability of the method was demonstrated with some parametric analyses.
Study on Sensitivity of Horizontal Freezing Parameters of Complex Curtain
Authors: Yu Changyi , Lu Mingyue
Published: November 2020

During the freezing construction, the temperature field, as a direct controlling variable, is affected by many factors in practical engineering. Therefore, based on the nonlinear finite element software ABAQUS and taking the actual physical parameters as the benchmark, this paper combines with a subway connecting passage project, and uses the single variable control method to analyze the influence of the thermal physical parameters of the soil on the freezing construction period of the soil: thermal conductivity, thermal conductivity, specific heat, latent heat and other thermal physical parameters. The results of this paper provide reliable support for the construction and design of similar projects.
Discussion on the application of fiberglass reinforced plastics in building energy saving
Authors: Chen Li Sheng
Published: November 2020

In this paper, it introduces the advantages of applying fiberglass reinforced plastics in detail and puts forward the practical application on building pipelines, building doors and windows and roof heat-preservation according to the current status of the use of fiberglass reinforced plastics in building energy saving, Due to the large energy consumption in China, the technicians use advanced technology to transform fibreglass reinforced plastics for the convenience of the improvement of energy efficiency, easing the energy shortage.
A review of research status of failure modes of base-isolated structures under long-period ground motions
Authors: Wang Yanan , Liu Yonghui , Peng Bin
Published: November 2020

As a relatively mature and effective passive damping technology, isolation technology is mostly used in engineering structures in high-intensity areas and post-earthquake reconstruction projects. In recent years, with the deepening of performance-based seismic engineering research, the study of damage failure of isolated structures under strong earthquakes has become one of the hot-spots in the field of seismic engineering research. This paper summarizes the research results of domestic and foreign scholars on the failure of the base-isolated structure under the action of long-period ground motions, and summarizes its main failure modes. Based on the main failure modes, it systematically analyzes the failure mechanism and finally points out there are still some issues to be studied.
Application research on slope deformation monitoring and earthwork calculation of foundation pits based on UAV oblique photography
Authors: Jiang Yi , Liang Weiqiao , Geng Pei
Published: November 2020

The stability of foundation pit slopes is a key concern during the construction of foundation pits. The deformation and instability of slopes will pose a major threat to the safety of foundation pits construction. Based on the foundation pit project of Shenzhen Dapeng People’s Hospital, this study uses DJI phantom 4 RTK drone to collect oblique photography data of the foundation pit in different periods, reconstructs high-precision 3D virtual models through the Bentley ContextCapture software and generates the Digital Surface Model (DSM) data. The model quality report shows that the accuracy of the three-dimensional model is better than 5 cm, up to about 1 cm. Spatial analysis of DSM data in different periods using ArcGIS can obtain the deformation of the foundation pit slopes. This method can also be used for the calculation of earthwork excavation of the foundation pit, which can effectively reduce the field workload of traditional earthwork surveys.
Research on commercial Space Design of cold Region City under the background of Resilient Urban
Authors: Xu Xiao Li , Guo Wei , Wu Jian Hui , Liang Jing
Published: November 2020

First of all, a field survey is carried out on the commercial space in the cold region, and a comparative analysis is made on the spatial design contents of commercial blocks in terms of regional location plane layout, traffic organization, spatial form and other aspects. Secondly, this paper analyzes the existing problems in resilient urban construction in the four aspects of overall design, space handling, block shape and environment design in commercial space planning and design. Basis on this, the space design countermeasures are proposed to enhance the adaptability and diversity of the space environment, enhance the redundancy of design and regionalization, strengthen the robustness and resilience of commercial space, and strengthen the intelligence and the ability of learning and transformation of the space environment.
Double control method for construction form finding of glass curtain system
Authors: Liu Huijuan , Li Chunhua , Yang Shengzhao , Chen Jianwei , Zhang Wei
Published: November 2020

An incremental equilibrium equation was deduced for the construction of glass curtain system with inverted-cone curved single-layer cable-net based on the theory of non-linear finite element method. In view of actual influence of glass installation during the construction process, analysis is made on the correction algorithm for formation of non-linear stiffness matrix of structure with consideration of glass installation. The developed algorithm allows for double control over the shape and pre-tension during the construction, and accurate determination of the structural configuration and cable force. Feasibility and accuracy of the method are verified and supported by the case study results.
Mix proportion design of liquid soil material suitable for abutment back filling
Authors: Huang Chongwei , Zhu Meixuan , Zhang Yi , Hu Kailun
Published: November 2020

To solve the uneven settlement between the structures such as comprehensive pipe gallery, abutment back and road, aiming at the problems of insufficient compactness and heavy self weight of backfill materials at the back of abutment, a new type of backfill material for gravity platform back, namely liquid soil, is proposed. Many tests have been carried out on the compressive strength and water stability of liquid soil. According to the test results, the mixing ratio of liquid soil suitable for abutment backfill is as follows: without adding additives, the mass ratio of cement to fly ash is 8:92, and the moisture content is 45% or 47%; when 1.5% water reducing agent is added, the mass ratio of cement to fly ash is 6:94 or 8:92, and the moisture content is 40%; when the maximum particle size is 5mm,the mass ratio of cement and fly ash is 4: 96 or 6:94, the moisture content is 25%.
The Discussion On The Influence Of The Form And Content Of Carbon On The Properties Of Carbon Steel And Cast Iron
Authors: Jin Aining
Published: November 2020

Carbon steel and cast iron are alloys consisting of iron and carbon. The carbon content and the form of its existence have a great influence on its performance. In this paper, the effects of carbon on the hardness, strength, toughness and plasticity of carbon steel and cast iron are analyzed through the difference of carbon content and existence form.
Sensitivity Analysis of Uniaxial Compressive Strength Characteristics of Artificial Frozen Soil
Authors: Yu Changyi , Lu Mingyue
Published: November 2020

Uniaxial compressive strength is the most basic mechanical property of frozen soil and a necessary mechanical parameter in frozen soil design and construction. Therefore, uniaxial compression test of frozen soil is one of the important test contents of frozen soil test. On the basis of field sampling, this paper conducts a series of uniaxial compression tests on silty clay and silty soil in Binhai New Area under different freezing temperatures. Through analysis and research, the uniaxial compression stress-strain relationship of frozen soil with different soils is established, and the variation law of uniaxial compression strength with freezing temperature is summarized. The results of this paper provide effective guidance for frozen soil design and construction.
Experimental Research on Mixing Ratio of Cement Mixing Pile in Different Soil Layers in an aviation city project in Zhuhai, Guangdong
Authors: Huang Weihong , Chen Zhijun , Chen Xiaofei , Song Bowen
Published: November 2020

The Pearl River Estuary area is mostly formed by siltation of deltas, with obvious stratification. An indoor cement mixing pile mix ratio test was carried out on the soil samples of the silt, clay layer and sand layer in an aviation city project in Zhuhai, Guangdong. By changing the cement content and age and other parameters, it reveals the influence of the cement content and age on the compressive strength of coment-soil in different soil layers, and gives the optimal cement content for the treatment of different soil samples with cement mixing piles, which plays an important role in improving the strength of cement mixing piles, saving construction costs and guiding on-site cement mixing pile construction.
Study on the penetration process of torpedo anchor into layer soils
Authors: Li Huanhuan , Li Gang , Zhang Jinli
Published: November 2020

Wing torpedo anchor is a new type of gravity anchor which is installed by self weight and anchored by gravity and seabed resistance. Based on the T98 torpedo anchor, the penetration process of torpedo anchor in layer soils is numerically simulated, and the change laws of penetration resistance, acceleration, velocity and penetration energy with depth is analyzed. The results showed that the end resistance and the friction resistance broke at the interface of soil layers, and the friction resistance increased with increasing of depth, while the end resistance first increased and then decreased. With the increasing of depth, the acceleration increased and the velocity decreased. In the early stage of penetration, the work is mainly done by the end resistance, whereas the work is mainly done by the side friction resistance in the later stage, suggesting that the side friction resistance consumed more anchor energy than the end resistance.
Research on the Development Path of Smart Tourism in Zhangye Two-aerospace Characteristic Town under the Background of Rural Revitalization
Authors: Yu Shibao , Yang Linping , Dong Yao
Published: November 2020

With the vigorous implementation of the rural revitalization strategy and the development of modern high-tech information technology, the construction of smart tourism in characteristic towns has increasingly attracted people’s attention. Based on the research on the theories related to the construction of smart tourism in characteristic towns, this paper analyzes the advantages and existing problems of the construction of smart tourism in Zhangye Two-aerospace Characteristic Town, proposes the characteristic towns smart tourism construction path from the four aspects of the smart tourism service system, the tourism marketing system, the smart tourism facility system and the smart tourism management system, in order to provide reference for the other Characteristic Town‘s development and construction of smart tourism.
Humanistic demand and spatiotemporal perspective in the evaluation of urban life quality—A case study of Shandong Province in China
Authors: Zeng Wen , Huo Xiaosen , Yu Zifang
Published: November 2020

The study of the quality of life needs to be guided by theoretical basis, especially the theory embodying humanism, because the fundamental significance of the study of quality of life is to improve human happiness. A brand-new evaluation system is creatively established in this article based on people-environment relationship by combining Maslow’s Hierarchy of Needs with urban development. Geographical analysis is also conducted to figure out the evolution of the spatiotemporal dynamics of quality of life, with the results indicating that urban life quality in Shandong Province have remarkable differences between areas are illustrated in the spatiotemporal evolution pattern. The growth rate of safety factors, social factors, and respect factors has differences between cities and regions, while the changes in survival factors and potential development factors are smaller, that reflecting different degrees of urban supply and demand in different periods and the real reason for the uneven life quality. In this article, the feasibility of the research method is confirmed, and a new research perspective for the evaluation of quality of life is provided.
Accuracy detection of Satellite and InSAR Technology in the Deformation Monitoring in Civil Engineering
Authors: Qiang Xiaojun
Published: November 2020

This paper focuses on the application of Satellite Navigation Positioning System (such as GPS and BeiDou Navigation Satellite System) and InSAR technology in healthy monitoring in civil engineering. Considering the high cost of Satellite Positioning measurement and blind spot of InSAR measurement, it is reasonable to combine both technologies for accomplishing regionally area and focused points monitoring. During the study, the control network points were positioned with GPS measurement technique and height differences were supported with precise levelling measurements. As the result of measurement campaigns, the height differences were determined from the GPS measurements and InSAR measurements respectively. Later on, deformation analysis using the height differences according to provided data from the GPS and the data from the InSAR system were carried out separately. The comparison between GPS and InSAR results will be shown in the paper.
Accuracy detection of Satellite Technology in the Deformation Monitoring of Slope
Authors: Lang Xiangwei , Li Weiming , Zhang Yuansheng , Li Junxin , Ma Hua
Published: November 2020

Recently, the use of Global Navigation Satellite System (GNSS) in slope deformation monitoring has received great attention in the world. However, the high expenses of the setup, especially different kinds of receivers for various monitored points, and the accuracy has limited the application of GNSS in health monitoring. This study focuses on the application of Satellite Navigation Positioning System (BeiDou Navigation Satellite System) in healthy monitoring in slope. During the study, the control network points were positioned with GNSS measurement technique and height differences were supported with precise levelling measurements. Later on, deformation analysis using the height differences according to provided data from the GNSS and the data from the Total Station were carried out separately. The comparison between GNSS and the Total Station results will be shown in the paper.
Characteristics of water environment along Baojiashan super long tunnel
Authors: Zeng Youquan
Published: November 2020

Based on the synchronous monitoring data of surface runoff, groundwater level and water inflow of Baojiashan super long tunnel, the characteristics of water environment along the tunnel are studied. The results show that: (1) Both surface runoff and groundwater level are significantly affected by rainfall, and the lag is not obvious. (2) The tunnel water inflow is significantly affected by rainfall, and the water is mainly discharged from the North portal. (3) Through the monitoring of the water pressure after the tunnel lining, it shows that the sand settling basin in the later stage of tunnel supplementary construction has played a great role in drainage and decompression, and has played a powerful role in ensuring the safe operation of the tunnel. (4) The change of tunnel drainage flow is closely related to precipitation, and tunnel drainage will not have a great impact on the surrounding environment.
Study on Site Selection and Layout Planning of Public Toilets in Urban Comprehensive Park: Taking Xuanwu Lake Park in Nanjing as an example
Authors: Yin Jie , Feng Nian , Wang Zixuan , Li Qiuyuan
Published: November 2020

Reasonable location and layout of public toilets can ensure the use efficiency of toilets in the park, and improve the use experience of tourists and satisfaction with the park. (1) Based on the background of “tourism toilet revolution”, this paper summarizes the existing methods to solve the problem of facility location, and analyzes the possibility of facility location in urban park. (2) This paper summarizes the single constraint conditions of the existing facilities location, less considering the flow of people and other issues, proposes and establishes a multi-level, multi constraint condition location model. (3) The optimization model proposed in this paper is applied to the location and layout of public toilets in Xuanwu Lake Park, Nanjing. (4) The location model proposed in this paper can meet a variety of constraints at the same time, and provide a more convenient, scientific and economic location method for urban park public toilets and other infrastructure services, landscape buildings, and provide reference for other types of urban park landscape building facilities location.
Traditional Model of Ziquejie Mountain Terraces in China and Scientificities on Irrigation Heritage Perspective
Authors: Li Yunpeng , Deng Jun , Tan Xuming
Published: November 2020

Terraces are an effective and common mode of mountain agriculture. Issues such as water resource storage and drainage, structural stability, impact on the conservation of soil and water, and their adaptive and influencing mechanism to the natural and social environment are important technical engineering issues in the creation and operation of terraces creating. Moreover, these issues are also the key topics in heritage research. Covering a total area of 6,416 hectares, Ziquejie Terraces located in South China is built on hills with an altitude of 460–1,540 m and a surface slope of 25°–40°. Owing to its 1,000-year history and simple but systematic irrigation and drainage system, Ziquejie Terraces has been included in The World List of ICID Heritage Irrigation Structure in 2014 as a unique type of agricultural irrigation. A systematic analysis has been conducted on its creation, influences on the ecological environment and human society, components and characteristics of irrigation and drainage system in the terraces area, and scientific and cultural values as a heritage area. Through such analysis, a traditional pattern of mountain agricultural development has been revealed under the population pressure and mechanism of background adaptation and environment response. The creation of Ziquejie Terraces has specific natural conditions. As an example of overall planning and exploitation of water and land resources, Ziquejie Terraces reflect ancient Chinese philosophy that the simplest projects could afford the largest comprehensive benefits. The successful experiences of Ziquejie Terraces should be used as reference of modern agricultural development in mountainous areas.
Research on Ecological Governance of Smart City in Lhasa under Big Data Environment
Authors: Zhou Rong , Zhang Bingle , Wang Shanshan
Published: November 2020

Smart city is a brand-new urban form with a new generation of information technology as the core and digital information infrastructure as the platform to achieve intelligent management in the fields of population, environment and public services, The construction of smart cities should standardize the operation mechanism, and reflect the technological height and value connotation of the new era in information planning, platform construction, and collaborative management, In the context of big data, smart cities are an effective way to solve the current urban development problems, However, it is difficult to adopt a unified model for the construction of smart cities, Therefore, smart cities need to be classified, Aiming at the current situation and problems of smart cities in Lhasa, the corresponding smart city construction suggestions are proposed, aiming to provide a realistic solution path and method for different types of cities to carry out smart city construction, which has certain reference significance for the future study of smart city classification construction problems
Research on Rotational Speed of Road Mixing Device for Large-Sized Cement Stabilized Crushed Stone
Authors: Zhan Ziquan , Si Guimao , Zhi Jingjing , Wang Gang
Published: November 2020

In order to prevent the reflection crack from happening in cement stabilized macadam base frequently, which lead to the decrease of pavement bearing capacity and working life, a new base structure- large sized cement stabilized crushed stone was raised. The rotational speed of mixing facility for this material was researched in this paper so as to obtain the best base performance, therefore, the construction process was simulated and analyzed in EDEM, which accepted the dispersion coefficient as the mixing quality index. The result shows that the index decreases with the increase of rotational speed between 65r/min and 120r/min and it rises a little and then remains stable when the speed is 120-150r/min. Finally, the 120r/min is regarded as the appropriate speed considering the index and power consumption.
Analysis of mechanical behavior of double arch tunnel by CD method and benching method
Authors: Li Nana , Zhou Yongqiang , Zhao Yanqiang , Li Guiju
Published: November 2020

In order to analyze the influence of different excavation methods on the stability of the tunnel, with reference to a tunnel engineering case, a three-dimensional finite element software was used for numerical simulation to study the stress variation, deformation and plastic zone distribution of surrounding rock during the excavation of the double arch tunnel under two different excavation methods, CD method and benching method. The results show that for the CD method, when the distance between left and right tunnel faces is more than 60m, the deformation, stress and plastic zone of surrounding rock and supporting structure tend to be stable. For the benching method excavation, when the distance between the left and right tunnel faces is more than 50m, the deformation, stress and plastic zone changes of surrounding rock and supporting structure tend to be stable.
Sensitivity Analysis of Flexural Strength Characteristics of Artificial Frozen Soil
Authors: Yu Changyi , Lu Mingyue
Published: November 2020

In subway engineering, artificial frozen soil wall is often used as temporary supporting curtain for underground connecting passage, which bears the effect of upper pressure and lateral earth pressure. In the actual subway tunnel project, artificial frozen soil is generally under both compression and bending. Therefore, to evaluate the soil strength, both compressive strength index and tensile and bending strength index of frozen soil are required. The tensile strength index of frozen soil has a great influence on the design and construction of frozen soil engineering, so it is of great significance to study the tensile strength by testing the flexural strength of frozen soil.
Studies On Out-of-Plane Stability of Arches with Web Openings Accounting for Plate Local Buckling
Authors: Li Yixiao
Published: November 2020

The out-of-plane elastic buckling behavior of I-section circular arches with web openings under radial uniform load, accounting for plate local buckling, is simulated and analyzed by finite element software ABAQUS. The buckling loads at different rise-to-span ratio, the height-to-thickness ratio of the web, hole radius and spacing are calculated. The results show that the out-of-plane buckling load decreases with the increase of hole radius and increases with the increase of hole spacing. By establishing the hole optimization function and adopting the modified dimensionless elastic buckling load, it is found that the structure has the highest efficiency when the hole radius is between 25% and 35% of the web height, and the hole spacing is between 30% and 50% of the web height.
Comparative Analysis of traditional settlement landscape of Leizhou Peninsula under the difference of topography and landform
Authors: Pan Ying , Dang Ji , Shi Ying
Published: November 2020

Leizhou Peninsula is located in Beibu gulf between Leizhou bay, has the good geographical position and pleasant climate environment for the development of appropriate settlement, is one of the important settlement developed gradually in the process of migration settlement of the formation and development is inseparable from the specific geographical conditions, different topography characteristics formed the different human settlements, therefore, traditional settlement forms are closely associated with geomorphology. Base on the geomorphic features of Leizhou peninsula, it can be classified into 5 geomorphological types, combined with the research of Google Earth and ArcGis Software and historical informations, collected the basic data of Leizhou peninsula, the representative of the traditional settlement landscape areas, statistic and analysed the data of settlement elevation settlement, waterfront distance settlement morphological characteristics and settlement landscape pattern characteristics, summarized the landform has significant influenced on traditional settlements, as the Leizhou peninsula, providing the theory basis for the protection and development of traditional settlement heritage.
Analysis of Spatial-Temporal Evolution of Quality of Life in counties in Shandong Province
Authors: Chen Jiaxi , Yu Zifang
Published: November 2020

Existing researches on the quality of life have mostly used socio-economic data for analysis and less research on the use of multi-source data; more research on large cities and less research on small and medium-sized regions; more research on single years and less research on evolution. This article uses Shandong province as an empirical case, using multiple data sources such as remote sensing data, PM2.5 meteorological data, socio-economic data, by selecting key indicators, a county-level quality of life indicator system based on the three dimensions of economy, society, and the environment was constructed, and using a variety of spatial analysis methods to analyze the quality of life in 137 counties (cities) in Shandong Province in the four years from 2000 to 2015. The results are as follows: (1) The overall spatial difference in the quality of life of counties in Shandong Province is quite large, and the polarization is severe. (2) Unbalanced development in all dimensions; unbalanced development of quality of life in municipal and non-municipal districts. (3) Radiation power is not strong in high quality of life areas. lack of core cities in low quality of life areas. According to the status quo, this article proposes reasonable targeted measures and suggestions.