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Full-Text Articles in Geotechnical Engineering
Infiltration Characteristics And Deformation Mechanism Of Rainfall-Induced Landslides In Three Gorges Reservoir Area Based On 1d And 2d Model Tests, Li Wang, Fang-Yun Nan, Shi-Mei Wangi, Yong Chen, Xiao-Wei Li, Zhi-Hong Fan, Yu-Shan Chen
Infiltration Characteristics And Deformation Mechanism Of Rainfall-Induced Landslides In Three Gorges Reservoir Area Based On 1d And 2d Model Tests, Li Wang, Fang-Yun Nan, Shi-Mei Wangi, Yong Chen, Xiao-Wei Li, Zhi-Hong Fan, Yu-Shan Chen
Rock and Soil Mechanics
Shallow deformation of ancient landslides induced by heavy rainfall is the most serious geological disaster in China's Three Gorges Reservoir Area (TGRA). It is important to explore the infiltration characteristics and its shallow deformation mechanism caused by heavy rainfall. In this study, the rainfall-induced landslide of the TGRA was selected as the research object, and the distributions of the soil permeability coefficients for rainfall-type landslide were summarized. Considering the effects of heavy rainfall, one-dimensional (1D) soil column infiltration test and two-dimensional (2D) landslide model test were conducted to study the infiltration characteristics of landslide soil and the corresponding shallow deformation …
Model Test And Finite Beam Element Solution Of Cyclic Lateral Characteristics Of Piles In Sloping Ground, Wen-Zhe Peng, Ming-Hua Zhao, Chao-Wei Yang, Heng Zhao
Model Test And Finite Beam Element Solution Of Cyclic Lateral Characteristics Of Piles In Sloping Ground, Wen-Zhe Peng, Ming-Hua Zhao, Chao-Wei Yang, Heng Zhao
Rock and Soil Mechanics
To reveal the cyclic lateral characteristics of piles in sloping ground under the combined influence of slope effect and cyclic weakening effect, one-way cyclic lateral loading tests with different cycle numbers, load amplitudes and slope angles were carried out, and corresponding lateral static loading tests were conducted as a comparison. The variation trends of pile head deflection, bending moment and subgrade reaction were revealed. Then, the element stiffness matrix was improved by considering the second-order effect and pile-soil interaction to develop the finite beam element solution. Finally, the theoretical predicted curves were compared with measured curves and results calculated by …
Experimental Research On Fracture Initiation Pressure Of Conventional Triaxial Slurry Fracturing In Similar Material Of Sandy Mudstone, Hua Cheng, Xiang-Yang Liu, Ru-Kang Cao, Xue-Song Wang
Experimental Research On Fracture Initiation Pressure Of Conventional Triaxial Slurry Fracturing In Similar Material Of Sandy Mudstone, Hua Cheng, Xiang-Yang Liu, Ru-Kang Cao, Xue-Song Wang
Rock and Soil Mechanics
To further explore the fracture initiation mechanism of fracture grouting in typical sandy mudstone from Huainan and Huaibei mining areas in China, a conventional triaxial fracture grouting test device was developed, and the model test of fracture initiation pressure of slurry fracturing in similar material of sandy mudstone was carried out. Based on the test results, the influences of rock strength and stress state on grouting fracture initiation pressure and fracture propagation pattern were analyzed, and the fracture initiation mechanism of fracture grouting in sandy mudstone was revealed. The results show that there is a positive correlation between the initiation …
Mechanical Response Characteristics Of Lining Structure Of Pipeline Karst Tunnels In Water-Rich Areas, Hao-Bo Fan, Ding-Kun Zhou, Yong Liu, Yu-Xiang Song, Zheng-Guo Zhu, Yong-Quan Zhu, Xin-Qiang Gao, Jia-Qi Guo
Mechanical Response Characteristics Of Lining Structure Of Pipeline Karst Tunnels In Water-Rich Areas, Hao-Bo Fan, Ding-Kun Zhou, Yong Liu, Yu-Xiang Song, Zheng-Guo Zhu, Yong-Quan Zhu, Xin-Qiang Gao, Jia-Qi Guo
Rock and Soil Mechanics
For the karst tunnel with pipeline cavities in the surrounding rock, it is very easy to accumulate high water pressure in the pipeline cavity due to the influences of heavy rainfall on the surface and groundwater, which will lead to lining cracking, water leakage, and water gushing diseases. To explore the influence of high water pressure on the lining structure, model tests of pipeline karst tunnels under high water pressure were carried out, and the internal force characteristics of tunnel lining under the influence of cavity position and water head height were studied. Based on the test findings, the numerical …
Model Test Of Failure Mechanism Of Tunnel With Flexible Joint Crossing Active Fault Under Strike-Slip Fault Dislocation, Guang-Xin Zhou, Qian Sheng, Zhen Cui, Tian-Qiang Wang, Ya-Li-Na Ma, Xing-Wei Fu
Model Test Of Failure Mechanism Of Tunnel With Flexible Joint Crossing Active Fault Under Strike-Slip Fault Dislocation, Guang-Xin Zhou, Qian Sheng, Zhen Cui, Tian-Qiang Wang, Ya-Li-Na Ma, Xing-Wei Fu
Rock and Soil Mechanics
Based on the fault crossing situation of Xianglushan tunnel of water diversion project, we conducted systematic monitoring and analysis of key mechanical characteristics of tunnel such as surrounding rock rupture pattern, lining damage pattern and crack development, strain distribution characteristics during faults dislocation simulation through indoor physical model tests, and thoroughly studied the damage form and failure mechanism of tunnel with flexible joint crossing active faults under strike-slip fault dislocation. In terms of the mechanism of the design parameters of the flexible joint tunnel to resist faulting, the effects of factors such as liner section length, liner thickness, tunnel diameter, …
Model Test Study On Dynamic Response Characteristics Of Host Rockmass And Supporting Bolt Under Blasting Load, Shi-Hai Chen, Jia-Chen Gong, Shuai-Wei Hu
Model Test Study On Dynamic Response Characteristics Of Host Rockmass And Supporting Bolt Under Blasting Load, Shi-Hai Chen, Jia-Chen Gong, Shuai-Wei Hu
Rock and Soil Mechanics
To study the dynamic response characteristics of host rockmass and supporting bolt under blasting load, a three-dimensional dynamic loading physical model test was performed using an underground engineering model test system. The propagation law of blasting seismic wave and the dynamic response characteristics of supporting bolt were tested using electric spark source instead of traditional explosives. Experimental research results show that the electric spark source has the characteristic of the impact loading, which can well replace traditional high explosives. The radial acceleration peak values and the axial and hoop strain peak values of blasting seismic wave within host rock do …
Physical Modeling Study On Treatment Of Waste Slurry With Vacuum Preloading At Bottom Combined With Upper Surcharge Loading, Liang-Tong Zhan, Bin Zhang, Xiao-Gang Guo, Wen-Hao Jiang
Physical Modeling Study On Treatment Of Waste Slurry With Vacuum Preloading At Bottom Combined With Upper Surcharge Loading, Liang-Tong Zhan, Bin Zhang, Xiao-Gang Guo, Wen-Hao Jiang
Rock and Soil Mechanics
To solve the safety problem of using waste slurry to backfill discarded open pit mine, the treatment method of vacuum preloading at bottom combined with upper surcharge loading is implemented in the model test. The feasibility of using this method in the backfilling of discarded open pit mine is discussed. The test results show that the proposed method can significantly reduce the water content of the slurry and increase the shear strength of the soil. The water content of the slurry reduces from 450% to 95%–105%, and the reduction of volume reaches 73.4%. The undrained shear strength increases from zero …
Model Test On Bearing Characteristic Of Static Drill Rooted Energy Pile, Fu-Yuan Li, Zhong-Jin Wang, Xin-Yu Xie, Yang Lou, Kui-Hua Wang, Peng-Fei Fang, Ling-Wei Zheng
Model Test On Bearing Characteristic Of Static Drill Rooted Energy Pile, Fu-Yuan Li, Zhong-Jin Wang, Xin-Yu Xie, Yang Lou, Kui-Hua Wang, Peng-Fei Fang, Ling-Wei Zheng
Rock and Soil Mechanics
In order to study the bearing characteristic of static drill rooted energy piles under thermo-mechanical coupling conditions, a self-designed model test system has been used to evaluate the thermal response of the model pile in the clay-sand double-layered foundation. The results show that the temperature of the pile is non-uniformly distributed along the depth, and the radius of thermally affected region around the pile is 3 times of its diameter. Accumulated settlements are observed on the pile top and the surrounding soil surface after 3 heating-cooling cycles. Driven under the load of 25% of the ultimate bearing capacity on top, …
Mechanism Of Foundation Pit Deformation Caused By Dewatering Before Soil Excavation: An Experimental Study, Chao-Feng Zeng, Xiu-Li Xue, Wei-Wei Song, Miao-Kun Li, Ning Bai
Mechanism Of Foundation Pit Deformation Caused By Dewatering Before Soil Excavation: An Experimental Study, Chao-Feng Zeng, Xiu-Li Xue, Wei-Wei Song, Miao-Kun Li, Ning Bai
Rock and Soil Mechanics
The existing research on foundation pit mainly focuses on the deformation caused by soil excavation. It is often believed that the retaining wall deformation would commence after soil excavation. However, some field measurements show that the dewatering conducted before soil excavation might have already induced retaining wall deflection and surrounding ground deformation, which could be at centimeter level. Apparently, the monitoring data excluding deformations caused before excavation will underestimate the environmental effect of the construction work. In order to investigate the mechanism of foundation pit deformation caused by dewatering before excavation, a similarity model test is conducted to simulate the …
Investigation Of The Rock Similar Material Proportion Based On Orthogonal Design And Its Application In Base Friction Physical Model Tests, Yi-Bing Ning, Hui-Ming Tang, Bo-Cheng Zhang, Pei-Wu Shen, Guang-Cheng Zhang, Ding Xia
Investigation Of The Rock Similar Material Proportion Based On Orthogonal Design And Its Application In Base Friction Physical Model Tests, Yi-Bing Ning, Hui-Ming Tang, Bo-Cheng Zhang, Pei-Wu Shen, Guang-Cheng Zhang, Ding Xia
Rock and Soil Mechanics
On the basis of iron barites sand cementation material, clay was added as the plasticizer and the weight ratio of clay to aggregates plus clay, the weight ratio of iron ore powder plus barite powder to aggregates, the weight ratio of iron ore powder to iron ore powder plus barite powder, and the weight ratio of gypsum to mixture were selected as four factors with five variable levels. Twenty five schemes of the material mixture ratio were designed using orthogonal design method, and related laboratory tests were conducted to obtain physical and mechanical parameters of similar materials such as density, …