不同边界条件对异形盾构管片接头力学性能的影响研究

朱叶艇; 张子新; 朱雁飞

doi:10.3973/j.issn.2096-4498.2022.06.008

隧道建设 >

2022 , Vol. 42 >Issue 6: 1003 - 1013

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.06.008

研究与探索

不同边界条件对异形盾构管片接头力学性能的影响研究

朱叶艇 ,
张子新 ,
朱雁飞

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（1. 上海隧道工程有限公司, 上海 200232； 2. 同济大学土木工程学院地下建筑与工程系, 上海 200092）

朱叶艇（1987—），男，浙江绍兴人，2017年毕业于同济大学，隧道及地下建筑工程专业，博士，高级工程师，主要从事盾构法隧道施工技术与衬砌结构力学性能方面的研究工作。Email： zhuyeting@stecmc.com。 *通信作者：张子新， Email： zxzhang@tongji.edu.cn。

网络出版日期: 2022-07-05

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Influence of Different Boundary Conditions on Mechanical Properties of SpecialShaped Shield Segment Joint

ZHU Yeting ,
ZHANG Zixin ZHU Yanfei

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(1. Shanghai Tunnel Engineering Co., Ltd., Shanghai 200232, China; 2. Department of  Geotechnical Engineering, Colledge of Civil Engineering, Tongji University, Shanghai 200092, China)

Online published: 2022-07-05

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摘要

为提升管片的承载和抗变形能力,对不同边界条件下的异形盾构管片接头力学性能进行研究。基于有限元方法对比简支梁式和钢蝴蝶式2种加载试验条件下的接头受力-形变特征，建立接头试验与整环试验之间关于接头转动刚度的关联性转化公式。研究得出： 1）不同试验状态下接头形变增量与荷载增加的响应一致，钢蝴蝶式加载方法因未考虑重力，其接头形变量值相对较大； 2）简支梁式和钢蝴蝶式接头转动刚度比随覆土厚度的增加分别呈二次函数减、增的变化趋势； 3）由于试验构件尺寸未满足细长梁的要求，构件理论最大挠度在应用时存在不适应性。

关键词：

异形盾构

; 盾构管片接头; 边界条件; 力学性能; 转动刚度; 数值模拟

本文引用格式

朱叶艇 , 张子新 , 朱雁飞 . 不同边界条件对异形盾构管片接头力学性能的影响研究[J]. 隧道建设, 2022 , 42(6) : 1003 -1013 . DOI: 10.3973/j.issn.2096-4498.2022.06.008

Abstract

Investigating the influence of different loading boundary conditions on the mechanical properties of specialshaped shield tunnel joints is necessary to improve the bearing capability and deformation resistance of tunnel segments. The stressdeformation characteristics of a segmental joint under two loading conditions of the simplysupported beam and steel butterfly type are compared using the finite element method. Further, the correlation transformation formula of joint rotational stiffnesses obtained from jointloading and fullring tests is established. The following conclusions are drawn: (1) Joint deformation increases with an increase in external load in all testing conditions, and the joint deformation derived from the steel butterfly type loading method is larger than that from the simplysupported beam method due to its disregard of the testing specimen′s selfweight in steel butterfly type. (2) The joint rotational stiffness ratios under the simplysupported beam and steel butterfly type loading conditions show a quadratic functional increase and decrease, respectively, as the burial depth increase. (3) The theoretical calculation of the joint′s maximum deflection is not adaptive during its application because the testing specimens are not thin beams.

Key words： ; specialshaped shield; shield segment joint; boundary condition; mechanical properties; rotational stiffness; numerical simulation

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