浅埋超大直径盾构隧道千斤顶推力对衬砌管片受力变形的影响研究

张稳军, 牛荣健, 起建兵, 张弛, 张高乐, 何历超, 吕计瑞

doi:10.3973/j.issn.2096-4498.2022.S1.008

隧道建设 >

2022 , Vol. 42 >Issue S1: 66 - 78

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.S1.008

研究与探索

浅埋超大直径盾构隧道千斤顶推力对衬砌管片受力变形的影响研究

展开

(1. 天津大学建筑工程学院，天津 300350; 2. 北京市首发高速公路建设管理有限责任公司，北京 101125; 3. 中交隧道工程局有限公司，北京 100024）

张稳军(1975—), 男, 甘肃平凉人, 2008 年毕业于日本早稻田大学, 建设工学专业，博士，教授，主要从事隧道与地下工程施工、设计教学与科研工作。E-mail: wjzquanzi@163.com。

网络出版日期: 2022-08-22

收起

Impact of Jack Thrust on Force and Deformation of Segment Linings for ShallowBuried Shield Tunnel with Super Large Diameter

Expand

(1. School of Civil Engineering, Tianjin University, Tianjin 300350, China; 2. Beijing First Expressway Construction Management Co., Ltd., Beijing 101125, China; 3. CCCC Tunnel Engineering Bureau Co., Ltd., Beijing 100024, China)

Online published: 2022-08-22

Fold

摘要

为研究浅埋超大直径盾构隧道在不同千斤顶推力及偏移作用下的衬砌结构受力及变形规律，运用有限元软件ABAQUS建立考虑水土压力、盾尾刷反力、千斤顶推力的盾构隧道衬砌管片三维模型，并分析衬砌管片在盾构直行、上行、下行以及左行条件下发生偏角时的衬砌内力及变形情况。结果表明： 1）千斤顶推力对衬砌管片的影响范围主要为前8环，明显反应在前3环，且环内最大错台位置主要集中在封顶块位置附近； 2）盾构掘进方向主要影响该方向的管环位移，对垂直方向的管环位移基本无影响； 3）拱顶/拱底主要受俯仰偏角影响，不受横摆偏角作用，拱腰则对横摆偏角更为敏感，受俯仰偏角影响较小； 4）当千斤顶发生俯仰偏角时，向下偏角极易引起前几环管片的应力激增； 5）当千斤顶发生横摆偏角时，同侧偏角更易引起该侧管片的位移及应力激增。

关键词： 超大直径盾构; 浅埋盾构隧道; 千斤顶推力; 衬砌管片; 结构内力; 变形

本文引用格式

张稳军, 牛荣健, 起建兵, 张弛, 张高乐, 何历超, 吕计瑞 . 浅埋超大直径盾构隧道千斤顶推力对衬砌管片受力变形的影响研究[J]. 隧道建设, 2022 , 42(S1) : 66 -78 . DOI: 10.3973/j.issn.2096-4498.2022.S1.008

Abstract

In order to study the structural force and deformation laws of shallowburied shield tunnel with super large diameter under different jack thrusts and deflections, a threedimensional model of shield tunnel lining segments considering water and soil pressure, shield tail brush reaction force, and jack thrust is established with finite element software ABAQUS. The internal force and deformation of lining segment are analyzed when the lining segment is deflected under the conditions of straight, upward, downward, and leftward movement of the shield. The results show that: (1) Jack thrusts mainly influence the first 8 rings of lining segment, in which the first 3 rings is more obvious, and the largest dislocation position in the ring is mainly concentrated near the capping; (2) The tunneling direction of shield mainly affects the displacement of the rings in this direction, instead of that in vertical direction; (3) The vault/bottom is mainly affected by vertical deflection angle and not affected by the lateral deflection angle, and the waist is more sensitive to lateral deflection angle and is less affected by vertical deflection angle; (4) When the vertical deflection angle occurs, the downward deflection angle is very easy to cause stress surge in the first few ring segments; (5) When the lateral deflection angle occurs, the ipsilateral deflection angle is more likely to cause displacement and stress surge in side segments.

Key words： ; super large diameter shield; shallowburied shield tunnel; jack thrust; lining segment; structural internal force; deformation

Options

文章导航

〈

〉

模态框（Modal）标题

摘要

本文引用格式

Abstract