bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on creep characteristics of residual soil in Central Yunnan Water Diversion Project
Authors: Li Chongyang , Zhang Qingwen 
Published: June 2021

Abstract
Sericite schist is an extremely soft rock. Most of the sericite schist residual soil in nature is in an unsaturated state, The matrix suction of the residual soil has a great influence on its strength. In this paper, an unsaturated quadruple consolidation tester and an unsaturated triaxial creep tester are used to carry out one-dimensional and three-axis creep tests on sericite schist residual soil. The test results show that the creep characteristics of the soil sample are obvious. Both the one-dimensional and triaxial tests show obvious three-stage characteristics. At the same time, the influence of the matrix suction and the net vertical stress on the creep characteristics of the soil is comparatively analyzed.
Resarch on Calculation Method of Pile Horizontal Response under Combined Loads
Authors: Li Yongzhi , Huang Wei , Ji Fuquan , Yang Minghui 
Published: June 2021

Abstract
The main function of the pile foundation is to bear the vertical load, but in actual engineering, the pile foundation usually bears combined loads which contain vertical load, lateral load and bending moment. Under combined loads, due to the P-Δ effect, the calculation of the bearing capacity and deformation of the pile foundation is very complicated. The small deformation superposition principle recommended by the current pile foundation codes fails to consider the resistance of the soil around the pile under the combined loads, and it is difficult to accurately evaluate the influence of P-Δ effect on the bearing capacity and deformation of pile foundation. In view of this, this paper firstly starts from the potential energy equation of the pile-soil system and deduces the calculation formula for the horizontal displacement of the pile considering the P-Δ effect, and it is verified in conjunction with related calculation examples. Then the factors affecting the P-Δ effect are discussed in detail, and the results show that the larger the load ratio is, the more obvious the P-Δ effect will be; when the pile top is fixed under the same load condition, the P-Δ effect will be significantly weakened.
Study on Surface Settlement Law of Shield Construction in Mudstone Stratum
Authors: Song Xiangshuai , Xiong Dongdong 
Published: June 2021

Abstract
In order to explore the influence of groundwater on the surface settlement law of shield construction under mudstone with different weathering degrees, this paper studies the influence of buried depth on surface settlement under different weathered mudstone, and the influence law of groundwater in stratum and different depths of water level on settlement of shield construction using a three-dimensional(3D) numerical model establish by finite element software based on the engineering background of Chengdu Metro Line 18. The results show that: (1) With the increase of buried depth, the range of lateral settlement trough on the surface gradually increases, but the maximum settlement gradually decreases. By analyzing the buried depth and the maximum surface settlement, it is found that the buried depth ratio has a logarithmic relationship with the corresponding maximum surface settlement. (2) The construction settlement increases obviously when there is groundwater in the stratum compared with when there is no groundwater. (3) The depth of water level above the vault and the maximum settlement caused by shield construction basically conform to the linear law. For every 1m increase in the depth of water level above the vault, the maximum settlement value can increase by about 0.43 mm. Compared with the field monitoring data, the calculation results are basically consistent, which shows the reliability of the calculation. This paper aims to provide experience for similar projects.
Mineralogical and mineral composition analysis of lacustrine sediments from Lake Toson, NE Qinghai-Tibet Plateau, China
Authors: Cheng Aiying , Yu Junqing , Gao Chunliang , Zhang Lisha 
Published: June 2021

Abstract
Mineralogy is very important in the study of lake, especially in the study of regional and past global change using lake sediments. In the final analysis, mineralogy could be involved in the study of the in-depth mechanism of lake sediments. In this paper, analysis the minerals by XRD in the sediments of Toson lake in the northeast of Qinghai-Tibet Plateau, the results showed that the main minerals in Toson lake were aragonite, calcite, quartz, halite, albite, muscovite, clinochlore and dolomite. And the main categories were detrital minerals and carbonate minerals with obvious reverse correlation. It suggested that Toson lake was mainly situated carbonate sedimentary stage, and the input of carbonate was lacustrine authigenic carbonate.
Analysis of influencing factors of passive building energy consumption in hot summer and cold winter area
Authors: He Chao , Wang Bojun , Yang Yanping , Jin Kai 
Published: June 2021

Abstract
Under the background of urbanization and the improvement of living standard, building energy consumption is increasing day by day and energy saving and consumption reduction in construction industry is imminent. As a new type of energy-saving healthy and livable building, passive building will inevitably become the development trend of future buildings. Based on the factors that affect the energy consumption of passive buildings in hot summer and cold winter areas, this paper finds out the main influencing indexes, calculates the accurate index weight by AHP and corrects it by entropy weight method in order to be more objective. Finally, the method is applied to an example and relevant suggestions are put forward based on the research results and the examples.
Research on earthquake damage mechanism of a subway station structure based on centrifuge shaking table tests and numerical analysis
Authors: Zhang Zihong , Xu Chengshun , Li Yang , Du Xiuli , Han Runbo 
Published: June 2021

Abstract
During the 1995 Kobe earthquake, the Daikai subway station witnessed serious collapse, which attracted the attention of people to the earthquake damage response of the subway structure. To study the earthquake failure mechanism of a subway station structure, two comparative dynamic centrifuge tests were performed. During the centrifuge tests, many important physical quantities cannot be directly monitored with appropriate instruments due to many limitations, such as extremely small model structures, extremely high collection frequency and complex centrifugal environment. To study the earthquake failure mechanism of a subway station structure in depth, an extended analysis of model tests was performed by means of numerical model. Finally, the earthquake failure mechanism was summarized in detail based on the numerical analysis.
Survey of Guoxia-Silaotou fault
Authors: Li Baolai , Zhang Hanliang , Ren Fengwen , Nie Dawei , Li Chunfeng 
Published: June 2021

Abstract
Guoxia-silaotuo fault is a part of Longxian-Baoji fault zone. In previous studies, people only inferred the spatial distribution of the fault from the indirect evidences of geomorphology and geophysics. In this paper, through the detailed investigation of the fault, the outcrop of the fault plane is found; the trenching method is used to investigate the fault, and the activity scale of the fault is revealed. It is found that in the late Pleistocene, the activity intensity of the fault is relatively high.
Treatment Technology of Closed Tunnel Filled with Water
Authors: Rao Weisheng , Li Dejie , Li Jiacheng , Feng Longjian 
Published: June 2021

Abstract
During the construction of No.3 connection gallery between huyong station and lvdaohu station of first phase project of Line 2 Foshan Rail Transit, water and sand kicks caused the large-scale settlement of tunnel segments. After comparison and selection of schemes, the rehabilitation scheme of abandoning the existing right line tunnel, shield machine starting from huyong station and heading to Lvdaohu Station by changing the line, is finally adopted. In order to prevent secondary disasters caused by the collapse of abandoned tunnels, the ground boreholes are used to fill the abandoned tunnels. During the construction, a series of key construction technologies have been formed, such as sectional backfill of abandoned tunnel, alternate backfill of underwater concrete and mortar, and prevention of pipe blockage. The results of core-drilling test and subsequent construction procedures show that the treatment scheme of abandoned tunnel is reliable and feasible, which can provide reference for similar projects.
Influence of retaining method of reservoir foundation pit on construction deformation of surrounding soil
Authors: Liu Zhanbo , Li Shuyi , Ren Jinming , Wang Junjie 
Published: June 2021

Abstract
In order to avoid the summer rainfall flood peak and improve the efficiency of rainwater utilization, many cities have put the construction of storage ponds on the agenda. However, the design of the foundation pit of the storage tank mostly adopts the design method of building foundation pit, that is, the foundation pit supporting structure will be dismantled after the main structure construction to a certain extent, so this has resulted in a greater waste of resources. In view of the above reasons, this paper proposes a economical foundation pit supporting structure of underground storage pond. This structure can be used as both retaining structure and pool body structure in the process of foundation pit excavation, which can reduce the waste of materials in the construction process and reduce the project cost. Through the calculation results of MIDAS-GTS software, it can be seen that the optimized structure has a good supporting effect in the process of foundation pit excavation, and can completely replace the temporary supporting structure in the original design scheme. The calculation results can provide reference for similar engineering construction.
Causes analysis of shield tunnel cracks in deep stratum with high water pressure
Authors: Tan Xiaofeng , Wen Bowei , Xu Chao , He Chuangbo , Xiong Dongdong , Song Xiangshuai 
Published: June 2021

Abstract
In the process of shield tunneling, there is a risk of cracks and diseases caused by geological changes, construction process, design and other factors, and leads to the construction process and even engineering accidents. This paper analyzes the cracks on the top of the segment under the geological conditions of deep burial and high water pressure by analyzing the cracks of a traffic rail project in Shenzhen, and analyzes the reasons for the cracks under normal construction. Based on the conventional stress model of segment and the screening of surrounding geological and hydrological conditions, the model assumption of local stress of integral segment is made, and the modified idiom and beam method are adopted- The results show that under the geological condition of fractured water stratum, the sudden change of water pressure caused by rainstorm and the joint action of broken rock block and segment floating will lead to the reduction of segment top space and direct contact with rock stratum, which will exceed the normal pressure range of segment and lead to cracks in the top segment.
Experimental research on geotechnical engineering characteristics of coral reef in Xisha Islands
Authors: Yang Yongkang , Yang Wu , Feng Chunyan 
Published: June 2021

Abstract
Coral reefs are widely distributed in Xisha Islands, which have special engineering properties. Coral reef geology from top to bottom is coral sand, coral gravel, coral reefs calcareous rock. Coral sand and coral gravel have the characteristics of mixed size particles, alternating accumulation of sand and gravel, great change of density and gradually coarsening from top to bottom. Coral reefs calcareous rocks are composed of loose bioclasts cemented, some of them are dense, and some of them are semi-cemented and weakly cemented. The geological age of the Xisha Islands within 50m was determined by carbon-14 radioisotope isotopic test. The bearing capacity and deformation characteristics of coral sand and coral gravel were analyzed by plate loading test, heavy dynamic penetration test, extra-heavy dynamic penetration test and standard penetration test. The physical and mechanical characteristics of coral reefs calcareous rock were studied by longitudinal wave velocity test, density test, porosity test and uniaxial compressive strength test.
Research on Construction Elevation Control of Wide-with Cable-Stayed Bridge with Low Pylon
Authors: Li Shuqin , Zhang Xuxin 
Published: June 2021

Abstract
Elevation monitoring is an important step in the construction process of wide low tower cable-stayed bridge. In this process, it mainly controls the difference between the actual elevation and the design elevation in the cantilever construction process of beam section, and controls the formwork elevation value of each section of beam section construction, In the study of cantilever construction elevation monitoring method, this paper analyzes the engineering background and elevation detection process error analysis, elevation control value selection and elevation linear control analysis, and takes a wide low tower cable-stayed bridge as an example, combined with the actual test results to verify the method. It is concluded that the elevation correction error is controllable and the construction alignment is consistent with the design alignment. The vertical alignment error meets the specification requirements, which can provide reference for the elevation control of similar projects.
Research on methods of investigation and analysis of highway slope stability after flood based on Insar and field investigation
Authors: Fan Jianbo , Xiong Xingbing , Peng Xi 
Published: June 2021

Abstract
The stability of highway slopes after floods is related to the smooth operation of traffic, construction and other related projects along the road. Taking highway slopes in Guizhou Province as the research object, conducting InSAR monitoring and on-site surveys on them, and obtaining a large amount of slope characteristic data after flood, the main conclusions are as follows: InSAR technology can study the influence of highway slope stability after flood, therefore, it saves a lot of manpower and time cost, uses on-site survey method to count the relevant characteristics of the slope along the highway, and uses the index system method to evaluate the risk level of the slope. It is believed that the road slope is prone to poor stability after the flood, and the risk level is higher.
Structure behavior of a fabricated shotcrete sandwich wall system under axial compression
Authors: Zhang Shoushuo , Xie Qun 
Published: June 2021

Abstract
A new type of fabricated shotcrete sandwich wall system is proposed. The wall system consisted of steel mesh, foamed concrete blocks, reinforced concrete layers, and core column. The shotcrete has been adopts in structural layer. Steel mesh is placed in the concrete layer. Foam concrete blocks are filled between concrete layers with function of insulation. Core columns are arranged along the cross section of wall with spacing 600mm. Prefabricated rebar cage place in core column. The finite element software ABAQUS is used to calculate its compressive strength, and the calculation results are compared with the theoretical method of related code. The results show that the FE simulation results have a good agreement with the formulation recommended by code.
Bearing Capacity of Steel Tube Tower Connection under Different Thickness of Gusset Plate
Authors: Chen Chen , Zhang Liang , Tang Yake , Zhang Qingfeng , Niu Kai , Pei Haowei , Ju Yanzhong 
Published: June 2021

Abstract
In this paper, a finite element model is established to study the influence of connection plate thickness on the bearing capacity of steel tube tower connections. Through the bearing capacity of connections under different connection plate thickness, the influence of connection plate thickness on the bearing capacity of steel pipe tower connections is analyzed. Finally, the relationship between the thickness of connection plates and the bearing capacity of steel tube tower connections is analyzed by regression analysis. The results show that with the increase of the thickness of gusset plate, the bearing capacity of steel tube tower connections increases linearly. The bearing capacity calculated by regression analysis is in good agreement with the finite element simulation results.
The Analysis of Tunnel Collapse Mechanism and Grouting Reinforcement Measures Under the Unsaturated Seepage Effect
Authors: Zhao Yang , Meng Ren , Wei Huang , Qing Yuan 
Published: June 2021

Abstract
Based on the unsaturated seepage and strength theory, the influence of seepage on tunnel deformation and stability is studied, the mechanism of tunnel collapse under seepage is deeply analyzed, and the grouting reinforcement measures are put forward. The analysis results show that the strength attenuation of unsaturated soil caused by seepage is the main inducement of tunnel collapse. The development of tunnel collapse is controlled by conducting the backpressure of surcharge, improving the softening condition of soil, and grouting reinforcement of soil with weakened strength. Finally, the risk of collapse is effectively solved.
Influence of Aluminum Powder Content on Expansion Rate of Foamed Concrete
Authors: Li Jiaqi , Jin Guangri , Quan Hechun , Jin Xianglin , Jin Man 
Published: June 2021

Abstract
Foamed concrete is a heat preservation and noise reduction material made of cement and aluminum powder as foaming agent. The experiment mainly studies the influence of different water-cement ratio, foaming agent dosage and cement dosage on the expansion rate of foamed concrete test block. The experimental results show that when the water-cement ratio increases from 0.4 to 0.6, the expansion rate decreases gradually. When the content of aluminum powder foaming agent increased from 0.05% to 0.40%, the expansion rate showed a trend of “increasing first and then decreasing”. When other conditions are the same, the expansion rate of cement increases from 500kg/m3 to 800kg/m3, showing a trend of “decreasing first and then increasing”.
Structural Reliability Analysis Using Genetic Algorithm and Gaussian Process Regression
Authors: Xiao Yanjie , Zhang Xun’an , Yue Feng 
Published: June 2021

Abstract
The implicit and computationally time-consuming performance function limits the application of classical reliability analysis methods in complex structures. To facilitate the reliability calculation of civil engineering structures, a reliability analysis method based on genetic algorithm (GA) and Gaussian process regression (GPR) is proposed in this paper. In this method, GPR is adopted to build the surrogate model of performance function, and GA is used for infill-sampling to improve the model accuracy at the limit state surface. Replacing the actual function with this model in Monte Carlo simulation (MCS), the approximate failure probability can be obtained. Four examples are analysed to validate the efficiency and accuracy of the proposed method. The results show that it can deal with the problems of static reliability and seismic reliability, and can be well combined with structural analysis software, which is convenient for engineering designers to use.
Research on quality Inspection method of Topographic Map using oblique Photogrammetry
Authors: Chen Yatong , Cao Jianjun 
Published: June 2021

Abstract
In view of the shortcomings of traditional methods in the quality inspection of large-scale topographic maps in Alpine area and high altitude areas, such as the difficulty of operation and the limited coverage of detection points, this paper puts forward the method of UAV tilt photogrammetry. This paper attempted to replace the traditional quality inspection method in the quality inspection of mathematical accuracy of large-scale topographic maps. By constructing the three-dimensional real scene model of the target area, this paper studied a new method for the quality inspection of large-scale topographic maps, which breaks through the fixed mode that the traditional quality inspection can only be checked by on-the-spot collection, further improve the accuracy and objectivity of the results quality inspection, intensive manpower and material resources, and improve the efficiency and quality of the quality inspection work. Comparing with the traditional check points collected in the field, the UAV tilt photogrammetry method can replace the traditional quality inspection method in the quality inspection of mathematical accuracy of large-scale topographic maps.
Fisheye Image Correction Based on Three-Dimensional Control Field
Authors: Song Ruhao , Zhou Guoqing , Wang Qingyang , Xie Yongfan , Luo Mengyuan 
Published: June 2021

Abstract
The fisheye image has severe distortions, which is not in line with human visual habits and brings inconvenience to its application. This paper classifies them into spherical structural distortion and optical distortion, and proposes a fisheye image correction method based on 3D control field. First, the spherical transformation radius and the optical center of the fisheye image are accurately solved, and the fisheye image is corrected by combining the spherical perspective projection; then, the distortion model of the fisheye camera is introduced into the DLT model to calibrate the optical distortion, and the results are used to recorrect the image. This method has been experimentally proven to be fast and effective.
A Modelling Tool for Rainfall-triggered Landslide Susceptibility Mapping and Hazard Warning based on GIS and Machine Learning
Authors: Zhou Haiwei , Yu Jianjun , Feng Hangjian , Huang Jie 
Published: June 2021

Abstract
The landslide susceptibility mapping and hazard warning are widely adopted tools by the government, stakeholders and the public for landslide disaster preparedness and emergency planning. This study presented a modelling tool based on geographic information system (GIS) and machine learning to aid the two-step modelling procedure. The machine learning methods including artificial neural networks, support vector machines, and logistic regression were integrated into the GIS environment for modelling landslide susceptibility to simplify and automate the routines of model training, verification and prediction. Then, the meta-element model was employed to take the landslide susceptibility, antecedent effective rainfall and 24-hour forecasted rainfall as inputs to determine the landslide hazard level. The architecture to deploy the established meta-element model for real-time landslide hazard warning was also proposed. A study case in Chunan, China was selected to demonstrate the applicability of the modelling tool to aid landslide susceptibility mapping and real-time hazard warning in response to a typhoon event. The developed modelling tool was desired to evolve into cloud computing architecture to facilitate easy-to-reuse and uplift its scalability.