【摘要】：以北京市通州綜合管廊上穿地鐵6號線暗挖施工為工程背景,采用ABAQUS軟件對暗挖施工過程進行有限元建模,分析管廊開挖過程對隧道結(jié)構(gòu)及周邊土體的影響。數(shù)值模擬結(jié)果表明:在開挖過程中,由于隧道上覆土體的移除,隧道周圍土體應(yīng)力釋放,隧道中段受到兩側(cè)和底部不平衡的土體壓力作用,發(fā)生向上的豎向位移;同時,由于施工開挖導(dǎo)致土體拱效應(yīng)破壞,上覆土體自重施加在管廊頂部,導(dǎo)致管廊與兩條隧道相交正上方的土體變形較大,管廊頂板處變形較大。
[Abstract]:Taking the tunneling construction of subway line 6 on Tongzhou comprehensive pipe corridor in Beijing as the engineering background, the finite element modeling of the tunneling construction process was carried out by using ABAQUS software, and the influence of the excavation process on the tunnel structure and surrounding soil was analyzed. The numerical simulation results show that during the excavation process, due to the removal of the overlying soil and the release of soil stress around the tunnel, the middle section of the tunnel is subjected to the unbalanced soil pressure on both sides and the bottom of the tunnel, resulting in the upward vertical displacement. At the same time, the soil arch effect is destroyed by construction excavation, and the overburden of soil is applied to the top of the pipe corridor, which results in the deformation of the soil directly above the pipe gallery and the two tunnels, and the deformation at the roof of the pipe corridor.
【作者單位】： 北京新奧集團有限公司;
【分類號】：TU990.3;U231;U456.3

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