论文部分内容阅读
结合江西省白沙关至婺源高速公路洪家坞连拱隧道进口的施工过程,对偏压隧道进洞进行了二维有限元分析;通过模拟4种不同的进洞开挖方式,获得了偏压连拱隧道在采用不同开挖顺序施工时各阶段围岩的应力应变状态、地表沉降以及隧道支护结构中的内力变化情况;通过分析比较,优化施工方案,得到了偏压连拱隧道合理的进洞方式,为今后类似条件下连拱隧道的进洞设计提供参考。
Combined with the construction process of the Hongjiawu multi-arch tunnel entrance from Baishaguan to Wuyuan Expressway in Jiangxi Province, the two-dimensional finite element analysis of the tunnel entrance was carried out. By simulating 4 different tunneling methods, Arch tunnel in different excavation sequence construction of the surrounding rock during the stress and strain of the state, the surface subsidence and the tunnel support structure of the internal force changes; through analysis and comparison and optimization of construction program, obtained a reasonable pressure into the multi-arch tunnel Hole way, which provides a reference for the hole design of double-arch tunnel under similar conditions in the future.