Double-arch Tunnel Construction Monitoring Measurement And Numerical Simulation Analysis

When constructing senior highway in China, the project double-arc tunnel is often adopted in special geological and topograph districts in order to get better technological and economical purpose. But we are low-level in double-arc tunnel design and construction comparing to advanced technology countries such as Japanese and Europe, America countries because of the inadequate knowledge and experience.The thesis is based on the two double-arc tunnels of Hunan province highway road, introducing detailedly various work of monitoring, such as observing rock and support, tunnel convergence and the inner force of anchor, the pressure of the top of the middle-wall. Taking the two twin-bore tunnels as original model, a numerical simulation to tunnel construction was carried by Ansys 7.0, then analyzing deeply various results of simulation to rock., anchor pipe, jet-concrete, the second shell, and researching unsteadiness reason of the middle-wall. At last, in order to verifying its feasibility, aid by Ansys, we gone on dynamic numerical simulation analysis to the new section form double-arc tunnel adopted expand excavating method with middle leading hole, and the result of calculation with new section form tunnel compared with the data of present double-arc tunnel, proved the validity optimized. At the last, comparing the results of the local test and with the results of simulation, the thesis draw some reasonable conclusion to supervising construction.This thesis analysis the unstable reason that double-arc tunnel's problem produced during the course of constructing, Having carried on the helpful try with monitoring and measuring and numerical simulation, the conclusion will has certain directive significance to double-arc tunnel's researching and building in the future.