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浙江大学学报(工学版)
浙江大学学报(工学版)  2021, Vol. 55 Issue (8): 1453-1463    DOI: 10.3785/j.issn.1008-973X.2021.08.006
土木工程、交通工程     
侧向土体影响下盾构隧道引起上覆管线变形
冯国辉1(),徐长节1,2,3,*(),郑茗旺1,薛齐4,杨开放1,管凌霄2,3
1. 浙江大学 滨海和城市岩土工程研究中心，浙江 杭州 310058
2. 华东交通大学 江西省岩土工程基础设施安全与控制重点实验室，江西 南昌 330013
3. 江西省地下空间技术开发工程研究中心，江西 南昌 330013
4. 浙江杭海城际铁路有限公司，浙江 嘉兴 314000
Deflection of overlying pipeline induced by shield tunneling considering effect of lateral soil
Guo-hui FENG1(),Chang-jie XU1,2,3,*(),Ming-Wang TEY1,Qi XUE4,Kai-fang YANG1,Ling-xiao Guan2,3
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2. Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiaotong University, Nanchang 330013, China
3. Engineering Research and Development Centre for Underground Technology of Jiangxi Province, Nanchang 330013, China
4. Zhejiang Hanghai Intercity Railway Co. Ltd, Jiaxing 314000, China
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摘要：

目前盾构隧道开挖对邻近管线影响的理论研究一般基于Winkler地基模型和Pasternak地基模型，较少考虑精度更高的Kerr地基模型及管线侧向土体影响对管线变形的约束作用. 将管线简化成Euler-Bernoulli梁搁置在Kerr地基模型上，利用差分法得到盾构隧道引起上覆管线竖向位移半解析解，在此基础上进一步推导考虑管线侧向土体影响的Kerr地基模型差分解. 通过与已有工程案例和离心机数据对比，验证Kerr地基模型相比于其他地基模型的优越性，也验证了考虑管线侧向土体影响的Kerr地基模型计算结果更加符合实测数据. 参数分析表明, 随着隧道开挖地层损失率和土体弹性模量的增大，管线的竖向位移和弯矩均增大；随着管线与隧道夹角的增大，管线的竖向位移和弯矩均减小.
关键词： 盾构开挖;  Kerr地基模型;  侧向土体影响;  管线变形;  有限差分法    
Abstract:

Studies on pipeline deformation caused by adjacent tunneling are generally based on Winkler foundation model and Pasternak foundation model, and few studies consider Kerr foundation model or the constraint effects of lateral soils beside pipeline. The pipeline was simplified as Euler-Bernoulli beam on the Kerr foundation model, an semi-analytical solution of vertical deformation of pipeline caused by underlying tunneling can be calculated by using the finite difference method, and another difference solution deformation of pipeline considering lateral soils beside pipeline was deduced. Through comparing with the case study on engineering practical and centrifugal results, it was verified that the Kerr foundation model has more advantages, and the calculated result of Kerr foundation model considering effects of lateral soils beside pipeline was close to the result of measured data. Results of parameter analysis show that, with the increase of volume loss ratio and soil elastic modulus, vertical displacement and moment of the pipeline increases. The vertical displacement and moment of the pipeline decrease with the cross angle between pipeline and tunnel increases.
Key words: tunneling    Kerr foundation model    effect of lateral soil    pipeline displacement    finite difference method
收稿日期: 2020-08-11 出版日期: 2021-09-01
CLC:  TU 91  
基金资助: 国家自然科学基金-高铁联合基金资助项目（U1934208）；国家杰出青年科学基金资助项目（51725802）；浙江省自然科学基金委员会-华东院联合基金资助项目（LHZ19E080001）；国家自然科学基金资助项目（51878276）
通讯作者: 徐长节     E-mail: ghfeng@zju.edu.cn;xucj@zju.edu.cn
作者简介: 冯国辉（1996—），男，博士生，从事土与结构相互作用研究. orcid.org/0000-0003-3315-4631. E-mail: ghfeng@zju.edu.cn
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引用本文:

冯国辉,徐长节,郑茗旺,薛齐,杨开放,管凌霄. 侧向土体影响下盾构隧道引起上覆管线变形[J]. 浙江大学学报(工学版), 2021, 55(8): 1453-1463.

Guo-hui FENG,Chang-jie XU,Ming-Wang TEY,Qi XUE,Kai-fang YANG,Ling-xiao Guan. Deflection of overlying pipeline induced by shield tunneling considering effect of lateral soil. Journal of ZheJiang University (Engineering Science), 2021, 55(8): 1453-1463.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.08.006    或    https://www.zjujournals.com/eng/CN/Y2021/V55/I8/1453

图 1  盾构隧道开挖对已有管线影响的简化模型
图 2  管线与隧道相交示意图
图 3  Kerr地基下管土相互作用模型图
图 4  管线-侧向土体相互作用
图 5  本研究方法解析结果与有限元结果对比图
R/m H/m z/m ε0/% ES/MPa v D/m EI/(kN·m2)
3.0 14.4 8.7 0.84 8.2 0.3 3.0 5.87×107
表 1  深圳地铁工程实例计算参数
图 6  管线位移计算及实测数据对比
R/m H/m z/m ε0/% ES/MPa v D/m EI/(kN·m2)
2.25 11.25 4.165 2 19.52 0.23 1.19 3.363×106
表 2  离心机试验参数
图 7  管线位移计算及离心机数据对比曲线
图 8  不同地层损失率下管线竖向位移
图 9  不同地层损失率下管线弯矩
图 10  不同土体弹性模型下管线竖向位移
图 11  不同土体弹性模型下管线弯矩
图 12  不同相交角度下管线竖向位移
图 13  不同相交角度下管线弯矩
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