隔离桩在隧道侧穿邻近浅基建筑中的应用

doi:-

东北大学学报:自然科学版 ›› 2013, Vol. 34 ›› Issue (1): 135-139.DOI: -

隔离桩在隧道侧穿邻近浅基建筑中的应用

纪新博¹，赵文¹，李慎刚¹，周作顺²

(1.东北大学资源与土木工程学院，辽宁沈阳110819；2.天津市市政工程设计研究院，天津300051)

收稿日期:2012-07-10 修回日期:2012-07-10 出版日期:2013-01-15 发布日期:2013-01-26
通讯作者: 纪新博
作者简介:纪新博(1987-)，男，吉林通化人，东北大学博士研究生；赵文(1962-)，男，内蒙古集宁人，东北大学教授，博士生导师.
基金资助:
“十二五”国家科技支撑计划项目(2012BAK24B01).

Application of Isolation Piles on Metro Tunnel for Side-Crossing the Buildings with Shallow Foundation

JI Xin-bo¹， ZHAO Wen¹， LI Shen-gang¹， ZHOU Zuo-shun²

1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Tianjin Municipal Engineering Design and Research Institute， Tianjin 300051， China.

Received:2012-07-10 Revised:2012-07-10 Online:2013-01-15 Published:2013-01-26
Contact: JI Xin-bo
About author:-
Supported by:
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摘要/Abstract

摘要： 针对某地铁新建隧道侧穿邻接浅基建筑采用隔离桩隔离的工程，进行了正交有限元法优化研究.先对比分析了既有建筑对隧道施工引起地表沉降的影响，使用隔离桩(模拟中采用经验隔离桩参数)的隔离效果，以及注浆对隧道稳定性的影响.然后，采用正交有限元方法对隔离桩3个主要参数进行优化设计.研究结果表明:既有建筑的存在改变了原自由地面的沉降槽形状，使变形和支护结构内力增大，隔离桩的打设和注浆对变形和内力有一定的控制作用.隔离桩最优参数为桩长33m，桩纵向间距0.5m和桩距离隧道1.5m.对桩的参数优化分析对于以后的类似工程有一定借鉴意义.

关键词: 隧道邻近建筑施工, 隔离桩, 正交有限元法, 隧道稳定性, 支护内力, 地表沉降

Abstract: The mechanical behavior and deformation of a metro tunnel using isolation piles adjacent to existing buildings with shallow foundation were studied with orthogonal finite element analysis method. Comparative analysis was implemented to examine:the settlement at the surface of existing building， the isolating effect of isolation piles and effectiveness of grouting on tunnel stability. Orthogonal finite element analysis was adopted to optimize three main parameters of isolation piles. The present results indicated that the existing building changes the shape of settlement trough and increases the inter-force and deformation. Isolation piles and grouting have some control on the deformation and inter-force of supporting structures. The optimal parameters of isolation piles are 33m in length， 0.5m in longitudinal spacing， and the distance between piles and tunnel is 1.5m. This kind of optimization may provide references for the similar construction design.

Key words: tunnel construction near the building, isolation piles, orthogonal finite element analysis, tunnel stability, supporting interforce, surface settlement

中图分类号:

TP274

纪新博，赵文，李慎刚，周作顺. 隔离桩在隧道侧穿邻近浅基建筑中的应用[J]. 东北大学学报:自然科学版, 2013, 34(1): 135-139.

JI Xin-bo， ZHAO Wen， LI Shen-gang， ZHOU Zuo-shun. Application of Isolation Piles on Metro Tunnel for Side-Crossing the Buildings with Shallow Foundation[J]. Journal of Northeastern University:Natural Science, 2013, 34(1): 135-139.

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隔离桩在隧道侧穿邻近浅基建筑中的应用

Application of Isolation Piles on Metro Tunnel for Side-Crossing the Buildings with Shallow Foundation

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