The 3-Demension FEM Analysis on Pipe Shed Support Technology in Underground Structure Engineering

Abstract:

Based on an actual construction project,a tunnel construction procedure with pipe shed support is simulated with three-dimension nonlinear FEM.The conclusion is: the pipe shed support have very tangible influence on controlling ground settlement,horizontal displacement of the side wall and plastic deformation.The influence of pipe diameters and spaces is limited on the displacement maximum,but has greater effect on the pipe internal stress.The influence of excavation lengths and the thickness of grout strengthening on tunnel structure are more obvious.The actual monitoring results demonstrated that the numerical simulation results are reliable and can be used as design and construction reference for pipe shed support engineering.