铁道科学与工程学报2017，Vol.14Issue(10)：2170-2176,7.
新建桩基础对既有隧道影响的三维变形分析
3D deformation analysis of the influence of new pile foundations on existing tunnel
摘要
Abstract
This paper took a parking lot project in Shenzhen as an example. Considering the features including piles' amount is large, the distance between piles and tunnels is very close and tunnels are located under the spot, this paper constructed a good-sized three-dimensional finite element model. The piles' influence on the underlying tunnel during the three sections including foundation's construction, load application and parking lot operation. The simulation result shows that: in piles' construction section, piles on both sides of the existing tunnel lead to vertical subsidence, horizontal convergence pointing to the inside space and overall distortion of the tunnel structure. Tunnel structure's deformation features in other two sections are similar to the one in construction section, and deformation is mainly caused by load application, while deformations in other two sections are small. Besides, the rationality of the simulation is demonstrated by the accordance between the computed result and practical monitoring data.关键词
近接施工/下伏隧道/变形分析/三维数值模拟Key words
approaching construction/underlying existing tunnel/deformation analysis/three dimensional numerical simulation分类
交通工程引用本文复制引用
邢凯,周中,张彬然..新建桩基础对既有隧道影响的三维变形分析[J].铁道科学与工程学报,2017,14(10):2170-2176,7.基金项目
国家自然科学基金资助项目(50908234) （50908234）
