上跨拟建隧道的地下综合管廊预保护效果

doi:10.3785/j.issn.1008-973X.2021.02.013

浙江大学学报(工学版)

2021, Vol. 55

Issue (2): 330-337 DOI: 10.3785/j.issn.1008-973X.2021.02.013

土木工程、交通工程

上跨拟建隧道的地下综合管廊预保护效果

崔允亮1(

),李志远1,2,魏纲1,陈江3,周联英1

1. 浙大城市学院土木工程系，浙江杭州 310015
2. 绍兴文理学院土木工程学院，浙江绍兴 312000
3. 浙江交工集团股份有限公司，浙江杭州 310051

Pre-protection effect of underground comprehensive pipe gallery over proposed tunnel

Yun-liang CUI1(

),Zhi-yuan LI1,2,Gang WEI1,Jiang CHEN3,Lian-ying ZHOU1

1. Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China
2. Civil Engineering College, Shaoxing University, Shaoxing 312000, China
3. Zhejiang Communications Construction Group Co. Ltd, Hangzhou 310051, China

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摘要：

针对地下综合管廊上跨拟建地铁隧道施工的情况，为了减少盾构施工对管廊的影响，在地下综合管廊施工时采取对管廊结构的预保护措施. 采用分布式光纤监测盾构施工对管廊结构的影响，并采用数值模拟手段分析不同预保护方案下盾构施工对管廊竖向位移的影响. 监测和分析结果表明：设置坑底加固联合减沉桩的预保护措施能有效控制盾构隧道施工对地下综合管廊变形的影响，预保护效果显著. 采用坑底加固可以有效减小管廊两端位移差；减沉桩的布桩方式对管廊沉降控制效果有重要影响；双线盾构隧道施工导致的管廊最大沉降发生在双线隧道之间部位，避开盾构线路在单节管廊两端和双线盾构隧洞之间部位设置减沉桩对管廊的保护效果更佳.

关键词： 盾构隧道; 预保护; 数值计算; 分布式光纤; 沉降; 地下综合管廊

Abstract:

For the construction of the pipe gallery across the proposed subway tunnel, pre-protection measures for the pipe gallery structure were taken during the construction of the pipe gallery in order to reduce the impact of shield construction on the underground comprehensive pipe gallery. Distributed optical fibers were used to monitor the influence of shield construction on the pipe gallery structure. Numerical simulation method was used to analyze the influence of shield construction on the vertical displacement of the pipe gallery under different pre-protection schemes. Monitoring and analysis results show that the pre-protection measures of bottom reinforcement and anti-sinking piles can effectively control the influence of shield tunnel construction on the underground comprehensive pipe gallery, and the pre-protection effect is significant. The bottom reinforcement can effectively reduce the displacement difference between the two ends of the pipe gallery. The pile arrangement has an important influence on the settlement control effect of pipe gallery. The maximum settlement of the pipe gallery caused by the construction of the double-line shield tunnel occurred between the two lines. Better protection effect can be achieved by setting anti-sinking piles under two ends of single pipe gallery and between double-line tunnels, avoiding the path of shield tunnels.

Key words: shield tunnel pre-protection numerical simulation distributed optical fiber settlement underground comprehensive pipe gallery

收稿日期: 2020-03-22 出版日期: 2021-03-09

CLC:

U 458.1

基金资助: 国家自然科学基金资助项目（51808493）；浙江省自然科学基金资助项目（LGF20E080007）；浙江交工集团股份有限公司科研资助项目

作者简介: 崔允亮（1984—），男，副教授，博士，从事软土地基土与结构相互作用研究. orcid.org/0000-0002-0965-2385.E-mail： cuiyl@zucc.edu.cn

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引用本文:

崔允亮,李志远,魏纲,陈江,周联英. 上跨拟建隧道的地下综合管廊预保护效果[J]. 浙江大学学报(工学版), 2021, 55(2): 330-337.

Yun-liang CUI,Zhi-yuan LI,Gang WEI,Jiang CHEN,Lian-ying ZHOU. Pre-protection effect of underground comprehensive pipe gallery over proposed tunnel. Journal of ZheJiang University (Engineering Science), 2021, 55(2): 330-337.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.02.013 或 http://www.zjujournals.com/eng/CN/Y2021/V55/I2/330

图 1 管廊与盾构隧道位置关系

表 1 各土层物理性质参数

图 2 光纤布置与监测

图 3 盾构穿越后光纤监测应变差

表 2 土体模型参数

表 3 结构尺寸及材料参数

图 4 盾构隧道与既有管廊的位置关系

图 5 盾构通过后管廊竖向位移

表 4 预保护结构分析工况设置

图 6 工况5、6减沉桩设置示意图

图 7 不同布桩方式的管廊沉降示意图

图 8 坑底加固与其他工况沉降对比

图 9 不同预保护方法沉降对比

图 10 各监测断面地表沉降

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