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Full-Text Articles in Geotechnical Engineering
Prediction Model For Compressive Strength Of Rock-Steel Fiber Reinforced Concrete Composite Layer, Meng Chen, Xiu-Wen Cui, Xin Yan, Hao Wang, Er-Lei Wang
Prediction Model For Compressive Strength Of Rock-Steel Fiber Reinforced Concrete Composite Layer, Meng Chen, Xiu-Wen Cui, Xin Yan, Hao Wang, Er-Lei Wang
Rock and Soil Mechanics
To study the uniaxial compressive strength calculation method of rock-steel fiber reinforced concrete (R-SFRC) composite layer, uniaxial compression test was carried out on rock, steel fiber reinforced concrete and R-SFRC composite layer specimens. The influence of concrete strength grades (C30, C40 and C50) and fiber contents (0, 40, 60 and 80 kg/m3) on the uniaxial compressive strength of steel fiber reinforced concrete and composite layers was analyzed. RFPA2D was utilized to simulate the damage process and stress-strain curve of the composite layer under uniaxial compression. The compressive strength prediction model of R-SFRC composite layer was established based on Mohr-Coulomb yield …
Numerical Simulation Of Open-Pit Mine Slope Based On Unmanned Aerial Vehicle Photogrammetry, Ai-Bing Jin, Shuai-Jun Chen, An-Yu Zhao, Hao Sun, Yu-Shuai Zhang
Numerical Simulation Of Open-Pit Mine Slope Based On Unmanned Aerial Vehicle Photogrammetry, Ai-Bing Jin, Shuai-Jun Chen, An-Yu Zhao, Hao Sun, Yu-Shuai Zhang
Rock and Soil Mechanics
Numerical simulation is a normal method for slope stability analysis in open-pit mines. Slope model construction is the basis of numerical simulation, and the accuracy of topographic measurement data has an important influence on the accuracy of slope stability analysis. In recent years, low-altitude and low-speed small unmanned aerial vehicles (UAVs) have been widely used in geological surveys, which provide a feasible method for rapid terrain measurement under complex conditions. Considering the situation of the rapid change of slope shape of the open-pit mine, the complex terrain, and the difficulty of manual measurement, a single-lens small unmanned aerial vehicle (UAV) …
Research On Random Propagation Method Of Hydraulic Fracture Based On Zero-Thickness Cohesive Element, Jun Li, Wen-Bao Zhai, Zhao-Wei Chen, Gong-Hui Liu, Ying-Cao Zhou
Research On Random Propagation Method Of Hydraulic Fracture Based On Zero-Thickness Cohesive Element, Jun Li, Wen-Bao Zhai, Zhao-Wei Chen, Gong-Hui Liu, Ying-Cao Zhou
Rock and Soil Mechanics
In order to effectively simulate the process of random propagation of hydraulic fractures in fractured shale reservoirs, a new method of random propagation of hydraulic fractures based on the finite element mesh embedded with zero-thickness cohesive elements is proposed. This new method is based on the topological data structure of element nodes and the splitting mode of mesh nodes. The accuracy and effectiveness of the random propagation method are verified by comparing with the analytical solution of KGD model and two kinds of laboratory experiments. Meanwhile, the influences of horizontal in-situ stress difference and reservoir heterogeneity on the process of …
Mechanism Research Of A New Constant Resistance Yielding Device For Tunnels, Chuan-Qing Zhang, Hao-An L, Xiao-Yan Liu, Hui Zhou, Yang Gao, Dong-Ming Yan
Mechanism Research Of A New Constant Resistance Yielding Device For Tunnels, Chuan-Qing Zhang, Hao-An L, Xiao-Yan Liu, Hui Zhou, Yang Gao, Dong-Ming Yan
Rock and Soil Mechanics
The constant resistance yielding support is the ideal form of support for squeezing tunnel. Current technology is difficult to satisfy the safety requirements of high bearing capacity, large deformation and load stability at the same time. In response to this problem, the constant resistance yielding device based on the principle of tension-compression conversion (CRYD-TCC) was developed inspired by the metal drawing process in combination with the working characteristics of steel arch support. In this paper, the working principle of the CRYD-TCC was discussed, and its mechanical response law and characteristics were analyzed. Through the indoor test and numerical simulation, the …
Study On Tunnel Water Inrush Mechanism And Simulation Of Seepage Failure Process, Zong-Qing Zhou, Li-Ping Li, Shao-Shuai Shi, Cong Liu, Cheng-Lu Gao, Wen-Feng Tu, Mei-Xia Wang
Study On Tunnel Water Inrush Mechanism And Simulation Of Seepage Failure Process, Zong-Qing Zhou, Li-Ping Li, Shao-Shuai Shi, Cong Liu, Cheng-Lu Gao, Wen-Feng Tu, Mei-Xia Wang
Rock and Soil Mechanics
In view of the two typical modes of water inrush disasters, progressive fracturing of rock mass and seepage failure of filling structure, the mechanism of progressive fracturing of rock mass under the combined effects of dynamic disturbance, excavation unloading and high water pressure is described. The seepage failure mechanism of the variable strength-variable permeability-variable viscosity of the filling structure under osmotic pressure is also expounded. For the variable viscosity mechanism of water inrush caused by seepage failure of filling structure, a qualitative simulation study on the effect of fluid viscosity on seepage failure mechanism is carried out using the DEM-CFD …
Single-Particle Crushing Test And Numerical Simulation Of Coarse Grained Soil Based On Size Effect, Min-Qiang Meng, Lei Wang, Xiang Jiang, Cheng-Gui Wang, Han-Long Liu, Yang Xiao
Single-Particle Crushing Test And Numerical Simulation Of Coarse Grained Soil Based On Size Effect, Min-Qiang Meng, Lei Wang, Xiang Jiang, Cheng-Gui Wang, Han-Long Liu, Yang Xiao
Rock and Soil Mechanics
The coarse-grained soil is prone to particle breakage under external loads and other factors. A series of single-particle fragmentation tests is conducted for mudstone and sandstone particles. Based on the size effect and fractal model of particle fragmentation, the relationships between the fractal dimension and single-particle crushing strength, fragmentation energy, and Weibull modulus are investigated. A single particle crushing process is analyzed using PFC3D and the modelling results are compared with that from the experimental data to verify the reliability of numerical code. The crushing strength and crushing energy of large particle size are then analyzed by numerical models. The …