Study On The Reasonable Construction Technology Of Twin-bore Highway Tunnel

When constructing senior highways in china, the project of twin-bore tunnel is often adopted in special geologic and topography districts in order to get better technological and economical purpose. But there are few twin-bore tunnels in constructed highways, so the experience that we can make for reference is scarce. In the advanced technology countries such as Japanese and Europe countries, there is more experience that we can make for in twin-bore tunnel design and construction because of the long theory of twin-bore tunnel construction.The thesis is based on the analysis of today's twin-bore tunnel research results. Combined with the great scientific research project which name is The Integrated Construction Research On The Twin-bore Tunnel, the 2D modeling tests are experimented in lab on ground of the three being constructed tunnels that are in the second phase of JinHua-LiShui-WenZhou highway road. A geometric scale of 1:20 is adopted on the model in these tests. On the base of geometric scale and gravity scale, the comparability that controls all physical and mechanical parameters in elastic condition is realized. To study and contrast the results of every boring method, the results of the ground relative displacement^ runnel convergence and the inner force of anchor pipe ^ steel support and line are gained in the deference construction method in every geologic and topography condition districts. The local test results are adopted to verify the test results. At last the thesis draw the conclusion of reasonable construction technology in given surrounding rock and its needed support parameters.