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隧道建设(中英文) ›› 2017, Vol. 37 ›› Issue (4): 442-448.DOI: 10.3973/j.issn.1672-741X.2017.04.009

• 研究与探索 • 上一篇    下一篇

双线平行盾构掘进对邻近浅基础建筑物影响理论分析

丁智1, 张霄1, 顾晓卫2, 魏新江1, 范俊聪3   

  1. (1. 浙江大学城市学院土木工程系, 浙江 杭州 310015; 2. 杭州杭港地铁有限公司, 浙江 杭州 310017; 3. 宏润建设集团股份有限公司, 上海 200235)
  • 收稿日期:2016-07-25 修回日期:2016-12-08 出版日期:2017-04-20 发布日期:2017-04-28
  • 作者简介:丁智(1983—),男,安徽铜陵人,2014年毕业于浙江大学,岩土工程专业,博士,副教授,主要从事地铁施工及运营对周边环境影响方面的研究与教学工作。Email: dingz@zucc.edu.cn。
  • 基金资助:

    浙江省自然基金项目(LQ16E080008); 国家自然科学基金资助项目(51278463,51508506)

Theoretical Study of Influence of DoubleLine Parallel Shield Tunneling on Adjacent Frame Building with Shallow Foundation

DING Zhi1, ZHANG Xiao1, GU Xiaowei2, WEI Xinjiang1, FAN Juncong3   

  1. (1. Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, Zhejiang, China; 2. Hangzhou MTR, Hangzhou 310017, Zhejiang, China; 3. Hongrun Construction Group Co., Ltd., Shanghai 200235, China)
  • Received:2016-07-25 Revised:2016-12-08 Online:2017-04-20 Published:2017-04-28

摘要:

为解决双线平行盾构隧道施工对邻近浅基础建筑物的变形及弯矩变化的影响问题,并对实际掘进工况给出施工建议,利用Sagaseta纵向地表变形计算公式,推导出双线平行盾构掘进影响区内浅基础建筑物地基、基础和结构协同作用的力学模型,分析得到浅基础框架建筑物变形以及弯矩变化规律。研究结果表明: 盾构隧道掘进区内,浅基础框架建筑物的弯矩大小随着开挖面的靠近逐渐增大,开挖面到达建筑物正下方附近时达到最大值,之后又逐渐减小; 建筑物倾斜率越大,梁端弯矩和底层柱对基础的约束弯矩也越大; 双线平行盾构先后掘进相比同时掘进引起的建筑物倾斜更小、沉降变化更加缓和,框架结构及基础梁的弯矩更小,且随着先后掘进开挖面距离的增大,弯矩变化曲线逐渐由V型转变成W型; 建议双线平行盾构施工时尽量避免同时掘进,并进一步加强对建筑物首尾沉降差及倾斜率的监测。

关键词: 双线平行盾构隧道, 框架建筑物, 浅基础, 沉降, 弯矩

Abstract:

A mechanical model for interaction among doubleline parallel shield tunneling and ground, foundation and structure of foundation of adjacent building is deduced and established by Sagaseta formula of longitudinal ground surface deformation, so as to study the influence of doubleline parallel shield tunneling on deformation and bending moment of adjacent frame building with shallow foundation. The results show that: 1) The bending moment of the frame building increases with the horizontal distance between building and shield boring face decrease; and it reaches peak when shield boring face reaches bottom center of building. 2) The restraining moment of beam end and bottom column to foundation increase with tilt of the building increase. 3) The influence of shield tunneling one line after another on the building is smaller than that of doubleline shield tunneling synchronously. The bending moment curve of building slowly turns into W shape from V shape with the distance between boring face of two line increase. 4) The authors suggest that the two tunnels should not be bored synchronously; and monitoring of the building should be strengthened.

Key words: doubleline parallel shield tunnel, frame building, shallow foundation, settlement, bending moment

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