盾构隧道双层衬砌结构纵向等效弯曲刚度研究——以上海吴淞口长江隧道工程为例

张迪, 陈睿杰, 廖少明

doi:10.3973/j.issn.2096-4498.2021.S1.004

隧道建设 >

2021 , Vol. 41 >Issue S1: 28

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.S1.004

研究与探索

盾构隧道双层衬砌结构纵向等效弯曲刚度研究——以上海吴淞口长江隧道工程为例

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（1. 中铁第四勘察设计院集团有限公司，湖北武汉 430063； 2. 同济大学地下建筑与工程系，上海 200092； 3. 同济大学岩土及地下工程教育部重点实验室，上海 200092）

张迪（1971—），男，湖北天门人，1995年毕业于西南交通大学，土建结构工程专业，本科，教授级高级工程师，现从事铁路、公路、轨道交通及市政工程等方面隧道及地下空间工程的规划、勘察、设计等工作。E-mail: zdiok@126.com。*通信作者：廖少明， E-mail: liaosm@126.com。

网络出版日期: 2021-08-27

基金资助

国家自然科学基金项目(52090082)

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Study of Longitudinal Equivalent Bending Stiffness of Double Layered Lining of Shield Tunnel: a Case Study of Wusongkou Yangtze River Crossing Tunnel in Shanghai

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（1. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China）

Online published: 2021-08-27

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摘要

为研究盾构隧道双层衬砌结构的纵向等效弯曲刚度，在对广义纵向等效连续模型简化的基础上，推导双层衬砌盾构隧道纵向等效弯曲刚度的表达式。以上海吴淞口长江隧道工程为背景，分析得到双层衬砌盾构隧道纵向刚度随环缝影响系数、内衬变形缝间距以及内衬厚度的变化规律。结果表明： 1）随着环缝影响范围的增大，纵向等效刚度有效率减小，且当环缝影响系数小于1时，纵向等效刚度有效率随环缝影响系数的增大骤减；而当环缝影响系数大于1时，减小速度趋于平缓。2）随着内衬厚度和变形缝间距的增大，隧道纵向等效刚度增大，但是增大速率逐渐减小。综合来看，提高变形缝间距的效果优于增大内衬厚度的效果。

关键词：

盾构隧道

; 双层衬砌; 变形缝; 纵向等效连续模型; 环缝影响范围

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张迪, 陈睿杰, 廖少明 .

盾构隧道双层衬砌结构纵向等效弯曲刚度研究——以上海吴淞口长江隧道工程为例

[J]. 隧道建设, 2021 , 41(S1) : 28 . DOI: 10.3973/j.issn.2096-4498.2021.S1.004

Abstract

To study the longitudinal equivalent bending stiffness of shield tunnel with doublelayered lining, the expression of longitudinal equivalent bending stiffness of shield tunnel with doublelayered lining is derived on the basis of simplifying the generalized longitudinal equivalent continuous model. A case study is conducted on Wusongkou Yangtze Rivercrossing tunnel in Shanghai, and the variation of longitudinal stiffness of doublelayered lining with the influence region of circumferential joints, the distance between deformation joints of secondary lining, and the thickness of secondary lining are analyzed. The results show the following. (1) The effective rate of longitudinal equivalent stiffness decreases with the increasing influence region of circumferential joints. When the influence coefficient of circumferential joints is less than 1, the effective rate of longitudinal equivalent stiffness decreases sharply with increasing influence coefficient of circumferential joints, whereas when the influence coefficient of circumferential joints is larger than 1, the effective rate of longitudinal equivalent stiffness decreases gently. (2) The longitudinal equivalent stiffness of tunnel increases with the increasing thickness of secondary lining and the span between deformation joints, and the increasing rate decreases gradually. Comprehensively, increasing the span between deformation joints is more beneficial than increasing the thickness of secondary lining.

Key words： shield tunnel; doublelayered lining; deformation joints; longitudinal equivalent continuous model; influence region of circumferential joints

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