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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

36卷

期数:

2019年06期

页码:

112-118

栏目:

出版日期:

2019-11-25

文章信息/Info

Title:

Effect of Assembling Mode on Structural Internal Force of Cross-river Electric Power Shield Tunnel with Large Cross-section

文章编号:

1673-2049(2019)06-0112-07

作者:

曹淞宇¹,袁 骏²,涂新斌²,封 坤¹,张晓阳²,苏 昂¹

(1. 西南交通大学 交通隧道工程教育部重点实验室,四川 成都 610031; 2. 国家电网有限公司,北京 100031)

Author(s):

CAO Song-yu¹, YUAN Jun², TU Xin-bin², FENG Kun¹, ZHANG Xiao-yang², SU Ang¹

(1. Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. State Grid Corporation of China, Beijing 100031, China)

关键词:

电力盾构隧道;  拼装方式;  衬砌变形;  结构内力;  梁-弹簧模型

Keywords:

electric power shield tunnel;  assembling mode;  lining deformation;  structural internal force;  beam-spring model

分类号:

TU311

DOI:

-

文献标志码:

A

摘要:

针对大断面电力盾构隧道穿越长江时管片拼装方式对隧道结构内力影响显著的问题,以苏通GIL综合管廊工程盾构隧道衬砌结构为研究对象,利用梁-弹簧模型模拟管片结构,采用荷载-结构模型计算管片结构荷载,对不同拼装方式下衬砌结构力学行为进行研究,分析了拼装方式对输电盾构隧道结构内力的影响效应。结果表明:错缝拼装控制管片结构内力,通缝拼装控制管片变形量; 通缝拼装的受力性能要优于错缝拼装,但通缝拼装的变形更大,在施工时要根据使用要求进行选择,同时管片结构力学行为在不同拼装方式下是不同的,与封顶块的位置、错缝角度、目标环的环向和纵向接头的位置有关; 拼装方式对管片最大变形量、最大正弯矩、最大负弯矩影响较大,对管片最大轴力影响较小; 在错缝拼装时,尽量避免错缝角度为180°,最理想的错缝角度在32.7°～81.8°之间; 所得结论可为输电盾构隧道管片拼装方式的选择提供借鉴和参考。

Abstract:

In view of the significant influence of segment assembly mode on the internal force of tunnel structure when the electric power shield tunnel with large cross-section crossed the Yangtze River, the lining structure of shield tunnel in Sutong GIL comprehensive pipe gallery project was taken as the research object, the beam-spring model was used to simulate the segment structure, and the load-structure model was used to calculate the load of segment structure. The mechanical behavior of the lining structure under different assembling modes was studied, and the effect of assembling modes on the internal force of the transmission shield tunnel structure was explored. The results show that the internal force of segment structure is controlled by staggered joint assembling and the deformation of segment is controlled by through joint assembling. The mechanical performance of the through joint assembly is better than that of the staggered joint assembly, but the deformation of the through joint assembly is larger, so it should be selected according to the use requirements during the construction. The mechanical behavior of segment structure is different under different assembling modes, which is related to the position of capping block, staggered joint angle, circular direction of target ring and position of longitudinal joint. The assembling mode has great influence on the maximum shape variable, the maximum positive bending moment and the maximum negative bending moment of the segment, but has little influence on the maximum axial force of the segment. In staggered joint assembly, try to avoid staggered joint angle of 180° and the most ideal staggered joint angle of 32.7°-81.8°. The conclusion can provide reference for the segment assembly of transmission shield tunnel.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2019-02-19
基金项目:国家电网重点研究项目(SHJJGC1700023)
作者简介:曹淞宇(1990-),男,河北保定人,工学博士研究生,E-mail:caosongyu111@163.com。

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更新日期/Last Update: 2019-11-26