某软土明挖隧道回填不均匀沉降控制技术研究  

Study on Differential Settlement Control of Open-cut Tunnel in Soft Ground

作　　者：林秀桂[1] 李志刚[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《地下空间与工程学报》2012年第4期828-835,共8页Chinese Journal of Underground Space and Engineering

摘　　要：不均匀沉降控制是软土地基处理的关键问题。本文结合沿海地区某接线工程,对软土地基城市明挖隧道的不均匀沉降控制问题进行了研究,分析了明挖隧道大面积高回填土下不均匀沉降控制标准和设计原则,对地基不处理、桩隔离和桩支撑三种施工控制方法进行了比选,并通过有限元动态模拟施工全过程,得出了隔离桩的施工处理方法。工程建成通车5年来,明挖隧道变形缝使用状况良好,地面道路及明挖隧道总体变形满足使用要求,采用的软土地基不均匀沉降控制标准和控制方法可以为同类工程提供参考,具有一定的借鉴意义。Differential settlement is the key problem of foundation treatment on soft ground. Based on the project on coastal region, the differential settlement of open-cut tunnel on soft ground is studied, the control standard and de- sign principle of differential settlement on open-cut tunnel in Large area high filling are analyzed, three methods of construction： without reinforcement, partition pile treatment and supporting pile treatment are compared, the finite el- ement model is used to stimulate the whole construction process, the method of partition pile treatment is obtained. It has been complete for five years, the movement joint of the open-cut tunnel has been well worked, the settlement of upper road and open-cut tunnel can meet the requirements of operation, the control standard and method of differenti- al settlement on soft ground can be refereed to the similar project.

关 键 词：软土地基 明挖隧道 不均匀沉降 地基处理 

分 类 号：O319.56[理学—一般力学与力学基础]