TUNNEL EXCAVATION MECHANICS RESPONDING SENSIBILITY PARAMETERS ANALYSIS BASED ON SEEPAGE-STRESS COUPLING 3D MODEL
The tunnel excavation in underground water environment destroys the balance of the original seepage field and stress . The whole process includes unloading stage, non-state seepage stage and consolidation stage. Meanwhile, this process concerns multitudinous parameters. How these parameters affect the mechanical response of tunnel is an important problem to be solved. In this study, based on the equifinality porous seepage-stress coupling theory of tunnel, the parameters analysis method by combining orthogonal test and 3D numerical simulation is provided. The flowchart of parameters sensitivity analysis method is also introduced. In terms of the excavation of small clear space mountain ridge tunnels in Shenzhen city, the 3D numerical analysis of solid-fluid coupling is carried out. The safety degree of lining and displacements of top and bottom of tunnel is selected as outputting responding indices. For the input parameters including Youngs modulus, Poisson ratio. Cohesion strength, internal friction angle, coefficient of permeability, and coefficient of Bolt, the paper adopts the orthogonal test numerical simulation and analyzes the parameters sensibility. It indicates that the parameters analysis method is feasible and the analyzed result has reference value for similar engineering.
JUN XING JING-PING QIU AN-NAN JIANG
School of Resources & Civil Engineering, Northeastern University Shenyang, 110004, P.R.China Institute of Highway and Bridge, Dalian Maritime University Dalian, 116026, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1505-1512
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）