双圆盾构隧道施工力学行为三维数值模拟  

3D Numerical Simulation of the Mechanical Behavior of Double-O-Tube Shield Tunneling

作　　者：孙统立[1] 张海涛[2] 

机构地区：[1]江苏省交通规划设计院股份有限公司,南京210005 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《城市轨道交通研究》2013年第5期36-40,共5页Urban Mass Transit

摘　　要：结合上海轨道交通M6线双圆盾构区间隧道工程,应用有限差分程序FLAC3D分析双圆盾构隧道施工力学行为,对双圆盾构施工扰动引起的土体位移场特性进行监测与数值模拟对比分析。分析表明,数值模拟结果与监测值基本吻合。双圆盾构施工扰动土体位移场特性与单圆盾构类似,但影响范围、量值更大。对于深层土体,计算所得的最大沉降、隆起值分别为-0.042m、0.08m,对于浅覆土地层,隧道开挖后,易出现整体上浮现象,隆起值达0.03m。双圆盾构施工扰动所引起的深层沉降、侧向位移还需要进一步研究。所得结论为进一步研究异形盾构施工环境土工影响提供参考。The construction mechanical behavior of DOT shield is executed by the FLAC3D finite difference method together with the section tunnel construction of Shanghai Metro Line 6 project. The ground movement induced by DOT shield tunneling from numerical simulation is compared with the measured data, and the research shows that they are basically consistent. The characters of the displacement field induced by DOT shield are similar as those of the common shield ttmneling, but with larger magnitude and scope. The calculated maximum settlement and upheaval are about - 0. 042m and 0.08m for the deep soil, while the shallow buried tunnel is prone to upheaval after excavation with the maximum upheaval value of 0.03m, therefore the layered settlement and lateral displacement caused by DOT shield tulmeling needs further studies. This research can provide some references for the study of environment soil engineering influenced by the non-circular shield tunneling.

关 键 词：双圆盾构隧道 土体位移场 数值模拟 有限差 分法 

分 类 号：U451[建筑科学—桥梁与隧道工程]