复合地层中超大直径泥水盾构掘进引起地表沉降的3D数值模拟分析  

3D Numerical Simulation Analysis of Ground Subsidence Caused by Super-Large Diameter Slurry Shield Tunneling in Composite Stratum

作　　者：程烨 施静康 张东明[1] 黄宏伟[1] CHENG Ye;SHI Jing-kang;ZHANG Dong-ming;HUANG Hong-wei(Department of Underground Architecture&Engineering,Tongji University,Shanghai 200092,China;Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海隧道工程股份有限公司,上海200032

出　　处：《中国市政工程》2022年第4期55-58,123,124,共6页China Municipal Engineering

基　　金：上海隧道工程有限公司2021年度重大专项课题“混合花岗岩地层超大直径盾构法跨海隧道施工关键技术研究”(2021-SK-07)。

摘　　要：超大直径泥水盾构具有对复杂地质条件良好的适应性而作为穿越各类地下通道的施工方法,在掘进过程中引起地表沉降是需采取措施加以控制的。结合深圳妈湾跨海通道工程,利用ABAQUS 3D有限元软件模拟超大直径泥水盾构掘进过程,并利用现场实测数据验证模型沉降数据的合理性。数值模拟结果发现,超大直径泥水盾构对地表沉降的影响可分为5个阶段,其中第II阶段和第III阶段为主要阶段,地表沉降占比达60%;另外,模拟发现软、硬地层分界面变化对地表沉降具有显著影响,使最大地表沉降增加111%。数值模拟计算可为后续施工沉降预测及控制提供依据。The super-large diameter mud-water shield has good adaptability to complex geological conditions and it is used as a construction method for crossing various underground passages.It is necessary to take measures to control the surface subsidence caused during the excavation process.Combined with the Shenzhen Mawan Cross-Sea Passage Project,ABAQUS 3D finite element software is used to simulate the excavation process of the super-large diameter muddy water shield,and the field measured data is used to verify the rationality of the model settlement data.The numerical simulation results show that the impact of super-large diameter mud-water shield on surface subsidence can be divided intofive stages,of which stage II&stage III are the main stages,and the surface subsidence accounts for 60%;in addition,the simulation found that soft&hard strata interface change has a significant effect on the surface subsidence,increasing the maximum surface subsidence by 111%.The numerical simulation calculation can provide the basis for the subsequent construction settlement prediction&control.

关 键 词：超大直径泥水盾构 上软下硬地层 地表沉降 3D有限元模拟 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]