地铁大断面隧道盾构过江风险分析及数值模拟

在地铁建设过程中,常出现线路须下穿大江大河的情况,尤其在南京、广州等南方城市的地铁建设中,这种情况更为普遍。本文以南京地铁西延过江线穿越长江段为工程背景,分析了大断面单洞地铁隧道盾构施工的施工风险,并采用数值模拟的方法,对施工过程进行模拟,通过对位移、应力及渗流场的分析,研究了大断面过江施工方案的安全性。

Risk analysis and numerical simulation on large cross-section shielding tunnel through river

Frequently,the subway line has to go through the river when it is constructing,especially in the south cities such as Nanjing,Guangzhou and so on.Verified with a part of Nanjing metro,which goes through the Changjiang river,the constructing risk of large cross-section is analysed,and the numerical simulating method is used to analyse the displacement,stress,and seepage,to take a conclusion that whether this scheme is safety and feasible.