盾构穿越高架对其桩基变形和内力影响分析  

Analysis on the Deformation and Internal Force of Foundation Piles of a Viaduct Caused by Shield Tunnel Construction

作　　者：姚燕明[1] 曹伟飚[1] 沈张勇[1] 

机构地区：[1]上海市隧道工程轨道交通设计研究院,上海200070

出　　处：《地下空间与工程学报》2005年第6期972-975,982,共5页Chinese Journal of Underground Space and Engineering

摘　　要：盾构法已经成为城市地铁区间隧道施工的一种重要方法,在盾构法隧道施工过程中,经常要从地上和地下重要建筑物附近穿越。某盾构隧道需要近距离从已有高架桥桩基下穿过,通过适当简化,采用平面连续介质有限元,模拟双洞单线盾构隧道施工的整个过程,考虑不同阶段土体的应力释放率,分析盾构隧道施工对桩基变形和内力的影响。Shield method has become an important method of metro tunnel construction in dries. During the construction of shield tunnel, it often occurs that the tunnel has to pass through some important constructions closely. In certain project, the shield tunnel needs to go through the underground piles of a viaduct in parallel. By simplifying the problem according to the project characteristic, the planar finite element is adopted to analyze the impact of whole process of the double single line tunnels construction on the deformation and internal force of the piles, considering the ratio of soil stress release.

关 键 词：盾构法 高架桩基 应力释放 变形 内力 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] TU473.1[交通运输工程—道路与铁道工程]