A5026281068- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Analysis
- Grouting, Rheology, and Soil Mechanics
- Dam Engineering and Safety
- Landslides and related hazards
China Railway 18th Bureau Group Corporation
2023-2024
Innovation Team (China)
2024
China Railway Group (China)
2023-2024
Beijing University of Technology
2021-2023
To evaluate hydraulic head distribution in front of a shield tunnel saturated soil layer, theoretical analysis and numerical simulations are carried out this study. Based on the partial differential equilibrium equation seepage flow, three-dimensional (3D) analytical model face field it is established using eigenfunction Fourier series expansion methods, calculation formula derived. Combined with engineering cases, results 3D simulation compared analyzed. The effect water pressure also...
In order to investigate the influence of face instability for tunnels with different burial depths in sandy cobble strata on earth pressure and region, geomechanical model tests numerical simulations were performed. The continuous excavation method was adopted reduce soil bin restore real engineering situation. Earth three directions observation section front tunnel monitored during tunneling shield. Evolutions lateral stress ratios at stages also investigated. area shield depth stage...
This paper focuses on the influence of permeability anisotropy seepage flow face stability for a shied tunnel. An analytical model has been proposed to present hydraulic head distribution around tunnel in anisotropic ground, considering difference coefficient horizontal direction and vertical direction. The rationality is verified by series numerical simulations. Then, an under established based limit analysis upper bound method. Comparisons solutions simulations are conducted, support...
Because of its non-viscosity, sand layer is easy to cause rock instability, which always a difficult problem in tunnel excavation.This study employs an integrated approach numerical simulation and theoretical analysis investigate the phenomenon shield faces blow-out shallowly buried sandy soil strata. The research effects burial depth diameter ratio angle internal friction on ultimate support pressure shape failure zone. According results, analytical model for has been developed. reveals...