软土地层多层交叉隧道结构体系的力学特性  

Mechanical Properties of Multilayer Cross Tunnel Structure System in Soft Soil Stratum

作　　者：钱滨[1] 黄俊[1] 

机构地区：[1]江苏省交通科学研究院股份有限公司,南京市210017

出　　处：《公路》2015年第3期218-222,共5页Highway

摘　　要：目前很多大中型城市正在修建或拟修建城市地下立交隧道,而在软土地区,地下隧道施工过程中受力变形的复杂性制约了该项工作的进行。结合某具体工程,通过数值仿真并联合部分现场监测数据,分析软土地层多层交叉隧道在施工和运营全过程期间隧道结构体系力学特性的变化规律,得到了施工过程中地下连续墙的最大水平位移和拉、压应力以及弯矩的变化过程;同时,也得到了运营载荷作用下,结构底板和中板的拉、压应力和弯矩分布图,以及最大拉、压应力和弯矩的数值及所在位置,为结构施工和运营维护安全提供支撑,也为今后类似工程建造提供参考。At present,many medium-sized cities are building or proposed to build urban underground interchange tunnel.But in soft soil area,the project is restricted by the complexity of the deformation force in the process of the construction.Combined with a specific project,the paper aims to analyze the variation of the mechanical properties of the structural tunnel system in the soft soil multi-layers cross tunnel in the construction and the entire process of the operation through numerical simulation jointed with some field monitored data.The process of change of the maximum horizontal displacement,tensile,compressive stress and bending moments of the underground diaphragm wall in the construction are obtained.Meanwhile with the help of the operation loads,the tensile,compressive stress and the bending moment distribution figures and values as well as their locations of the structural bottom and the medium slabs are worked out,which can provide support for structure construction and operation and maintenance safety as well as reference for similar engineering in future.

关 键 词：地下隧道 多层交叉 大跨 异形结构 数值仿真 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]