盾构隧道施工对临近桩基影响数值分析  

Numerical analysis on influence of shield tunnel excavation to neighboring piles

作　　者：凌燕婷[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《广东公路交通》2009年第3期69-71,共3页Guangdong Highway Communications

摘　　要：以上海轨道交通七号线下穿明珠线盾构施工为依托，通过采用摩尔一库伦弹塑性屈服准则，建立二维有限元数值模型，研究上海轨道交通七号线盾构隧道开挖对邻近桩基的影响。数值模拟结果表明：当盾构土仓压力控制在0．28～0．34MPa，同步注浆压力控制在0．26～0．32MPa的情况下，盾构推进能保证桩基的安全。Approaching excavation is one of the important research subjects in the field of tunnel engineering. Combined with the project of subway line 7 passing from the bottom of existing subway line 3 in Shanghai in this paper, by using Mohr - Coulomb yield criterion, a two - dimensional numerical model was established, and the influential principles of tunnel excavation of Shanghai Rail Traffic No. 7 Line were also studied. These conclusions can be used as reference and guide during the construction. According to the numerical simulation results, safety of piles of Shanghai Rail Traffic No. 3 Line can be obtained during the construction when soil pressures of shield are controlled from 0.28 to 0.34 MPa and simultaneous grouting pressures are controlled from 0.26 to 0.32 MPa.

关 键 词：盾构 数值模拟 隧道工程 桩基础 

分 类 号：U451.5[建筑科学—桥梁与隧道工程]