杜布隧道左洞初支换拱及右洞开挖支护计算

The numerical simulation for the left tunnel exchanging arch and the right tunnel excavation support of Dubu tunnel

结合杜布隧道的工程概况,建立了该隧道的有限元模型,对隧道左洞初支换拱及右洞开挖进行了数值模拟计算,分析了左右洞初支与围岩的受力情况,指出初期支护设计参数均满足隧道结构受力要求,隧道处于稳定状态。

Combining with the engineering survey of Dubu tunnel,the paper establishes the finite element model,undertakes the numeric simulation calculation of the left tunnel exchanging arch and right tunnel excavation,analyzes the stress at the primary support of left and right tunnels and surrounding rock,and points out the support design parameter in the primary phase can meet the stress demands of tunnel structures,so the tunnel is in stability status.