施工开挖模式对地铁站洞桩法的影响效应研究  

Study on the Impact of Excavation Mode on Subway Station Constructed with Hole-pile Method

作　　者：焦洋[1] 胡永利[2] 

机构地区：[1]哈尔滨工业大学建筑设计研究院,哈尔滨150090 [2]中铁十四局集团有限公司,济南250002

出　　处：《防灾减灾工程学报》2013年第S1期68-72,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51108135)资助

摘　　要：以假定洞桩法施工的地铁站为工程背景,分别采用分跨开挖和全断面开挖模式进行施工。应用有限元软件建立数值模型,对地铁站在分跨开挖和全断面开挖模式下的洞桩法施工过程进行模拟,经计算得出在两种开挖模式下施工地铁站引起的地表沉降、侧桩水平位移、底板隆起的对比图。通过分析位移对比图,得出全断面开挖在位移控制方面较优的结论,从而深化了施工开挖模式对地铁站洞桩法影响效应的认识,且可为类似工程提供参考。Assumed subway station constructed with hole-pile method is taken as engineering background.The subway station is simulated to be excavated both in span and in full face.Finite element software is adopted to establish the numerical models and to simulate the construction processes of the subway station constructed with hole-pile method excavated in span and full face, then comparison charts of surface settlement,lateral horizontal displacement of piles,floor uplift are obtained by computation.The result shows that excavation in full face is superior to excavation in span in controlling displacement.The influence mechanism can be deeply understood through the research.The conclusion can provide valuable reference for similar projects.

关 键 词：洞桩法 有限元法 开挖模式 地铁站 

分 类 号：U231.3[交通运输工程—道路与铁道工程]