摘要
运用有限差分软件FLAC3D对武汉地铁2号线中邻近高架桥的中山公园车站深基坑的开挖与支护进行了数值模拟,通过计算得出不同开挖阶段及地下连续墙不同埋深情况下围护结构及邻近高架桥桩的变形特性.计算结果表明:在深厚的细砂层中,地连墙变形有明显的'踢脚'现象;基坑开挖会引起邻近高架桥桩的侧向变形,最大侧移发生在开挖面附近.随地连墙插入比的增大,地连墙'踢脚'现象有所减缓,高架桥桩侧向变形有一定的减少,但仅依靠增加地连墙插入比来减少高架桥桩侧向变形是不经济的.
The finite-difference software FLAC3D was employed to simulate excavation and support of the foundation pit in Zhongshan Park Subway Station of Wuhan subway line 2. Deformation characteristics of the support structure and piles of the adjacent viaduct were analyzed in different excavation stages and different embedded depth of underground diaphragm wall. The numerical results indicate that there is a significant ＇kickout＇ phenomenon in deep fine sand layer, and that the excavation of the foundation pit causes lateral movement of the piles of the adjacent viaduct, and the largest lateral dis placement occurs near the excavation face. As the embedded depth of the underground diaphragm wall increases, the ＇ kickout＇ phenomenon becomes less evident and the lateral movement of piles of the adjacent viaduct decreases, but it is not economical to decrease the lateral movement of piles of the viaduct by only increasing the insertion ratio of underground diaphragm wall. The numerical results also provide a useful reference for the design and construction of similar projects.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第6期120-123,128,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
新世纪优秀人才支持计划资助项目(NCET-06-64)
武汉市科技攻关计划资助项目(200860423194)
关键词
高架桥
桩基础
数值模拟
基坑开挖
地连墙
变形特性
viaduct
pile foundation
numerical simulation
foundation pit excavation
diaphragm wall
deformation characteristics
