岩土力学Issue(5)：1459-1468,10.
基坑开挖对下卧运营地铁隧道影响的数值分析与变形控制研究
Numerical analysis of effect of excavation on underlying existing metro tunnel and deformation control
摘要
Abstract
According to the practice of the excavation of the Xiqing Road Tunnel adjacent to the existing tunnel of the operating Tianjin Metro Line 1, ABAQUS is applied to simulate dynamically the construction process based on the field monitoring data. On this basis, the effects and the effectiveness of the soil reinforcement alongside the existing tunnel, a protection hoop formed by the slab and anti-floating piles and the reverse heap-loading on the track deformation of the existing tunnel are analyzed. It is found out that the above protection measures adopted synthetically can timely and effectively control the uplift of the track in the existing tunnel and ensure the safe operation of metro. Furthermore, the effect law of the different reinforcement parameters on the track deformation of the existing tunnel are studied. The results show that the increase in the different reinforcement parameters can reduce the up lift of the track in the tunnel and the different deformations between the two adjacent boxes of deformation joint, but the reinforcement effect decreases with increase of the parameters;and there exists a reasonable scope of the reinforcement. The results can provide evidence for the optimization of the construction design.关键词
运营地铁线路/基坑开挖/实测/有限元分析/差异变形Key words
operating metro line/excavation/field observation/finite element analysis/differential deformation分类
建筑与水利引用本文复制引用
郑刚,刘庆晨,邓旭..基坑开挖对下卧运营地铁隧道影响的数值分析与变形控制研究[J].岩土力学,2013,(5):1459-1468,10.基金项目
国家重点基础研究发展计划（973计划）资助项目(No.2010CB732106)。 （No.2010CB732106）
