Study On Analytic Solution Of Torsional Deflection On Subway Tunnel Structure Inclined Wear Activities Ground Fissure

Subway tunnel in inclined wear activities in the ground fissures bending moment, shear stress state, twist, aiming at the complex torsional damage, the current standards and regulations is not the horseshoe-shaped like section structure design methods, and wrest resistant wrest resistant design of metro tunnel no corresponding provisions and basisIn order to study the subway tunnels to crack eccentricity concentrated torque M=Pe and surrounding rock friction distribution torque M under the combined action of torsional deformation damage analytic solutions, based on thin rods free torsion and constraint torsional theory, this paper proposes a random cross-section shape metro tunnel in eccentric concentrated moment M=Pe and friction distribution torque M under the action of general analytic solution for general analytic solution, the complex, puts forward the "more convenient and practical method of parameter" analytic solutions early. Use "early method of parameter" respectively in eccentric concentrated moment M=Pe, friction distribution torque M and the two jointly role of three conditions box, circular tunnel section torsional Angle and normal stress and shear stress and calculated and transverse torque. And by using the finite element software ANSYS, the three conditions 3d numerical model calculation and analysis, the results indicate1.box tunnel in concentration and distribution torque common role of tunnel structure to crack in reverse Angle in the biggest, maximum achieve radian than analytical method, the maximum small 0.41% obtained; Shear stress cracks in the biggest, reach to 75.08 Kpa, the shear stress than analytical solution get big 4.24%.2.circular tunnel in concentration and distribution torque common role of tunnel structure to crack in reverse Angle in the biggest, maximum achieve radian than analytical method, the maximum small 1.10% obtained; Shear stress cracks in the biggest, reach to 125.87 Kpa, the shear stress than analytical solution get big 5.28%.3.numerical simulation of that with all the eigenvalues section of the conclusion of the analytical solution has the same change trend, prove the correctness of the analytic method.This paper research achievements on the ground fissures rich torsional deformation and damage of underground structure calculation theory of subway tunnel, inclined to wear the ground fissures wrest resistant paragraph structure to take measures to have the certain reference value.