隧道初期支护钢拱架早期承载性能试验研究

庄一舟; 薛琛博; 郑国平; 李长俊; 冯展; 陆钰铨

doi:10.3973/j.issn.2096-4498.2022.10.003

隧道建设 >

2022 , Vol. 42 >Issue 10: 1693 - 1702

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.10.003

研究与探索

隧道初期支护钢拱架早期承载性能试验研究

庄一舟 ,
薛琛博 ,
郑国平 ,
李长俊 ,
冯展 ,
陆钰铨

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(1. 浙江工业大学土木工程学院, 浙江杭州 030014; 2. 浙江数智交院科技股份有限公司, 浙江杭州 030014)

庄一舟（1964—），男，浙江宁波人，2007年毕业于美国韦恩州立大学，结构工程专业，博士，教授，现从事桥隧工程研究与教学。 Email: yizhouzhuang@qq.com。

网络出版日期: 2022-11-04

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Experimental Research on Early LoadBearing Capacity of Steel Arch for Tunnel Primary Support

ZHUANG Yizhou ,
XUE Chenbo ,
ZHENG Guoping ,
LI Changjun ,
FENG Zhan ,
LU Yuquan

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(1. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 030014, Zhejiang, China; 2. Zhejiang Institute of Communications Co., Ltd., Hangzhou 030014, Zhejiang, China)

Online published: 2022-11-04

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摘要

为系统分析隧道格栅钢架和型钢钢架支护初期的力学性能，针对三肢格栅钢架、四肢格栅钢架和14号工字型钢钢架开展室内加载试验研究；同时，引入钢材性能系数以直观比较不同类型钢架的综合性能。研究表明： 1）在支护初期，格栅钢架与混凝土的结合性能比型钢钢架好，并且在受到集中力影响时，型钢钢架的安全隐患大于格栅钢架； 2）钢拱架在实际使用中会受到偏心荷载的不利影响，其中四肢格栅钢架受到的影响最显著，设计时应增加四肢格栅钢架跨中抗扭钢筋布置。

关键词： 隧道; 初期支护钢拱架; 混凝土-钢拱架组合; 早期力学性能; 钢材性能系数; 对比试验

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庄一舟 , 薛琛博 , 郑国平 , 李长俊 , 冯展 , 陆钰铨 . 隧道初期支护钢拱架早期承载性能试验研究[J]. 隧道建设, 2022 , 42(10) : 1693 -1702 . DOI: 10.3973/j.issn.2096-4498.2022.10.003

Abstract

In this study, indoorloading tests are performed for triangular lattice, tetragonal lattice, and No.14 Ishaped steel arches to systematically analyze the mechanical properties of steel arches. Then, a steel performance coefficient is introduced to comparatively analyze the comprehensive characteristics of various types of steel arches. The research results reveal the following: (1) In the initial stage of tunnel support, the bonding performance between the lattice arch and shotcrete is better than that of the Ishaped steel arch, and the potential safety risk of the Ishaped steel arch is higher than that of the lattice arch under a concentrated force. (2) Steel arch can be adversely affected by an eccentric load in actual service, especially the tetragonal lattice arch. Therefore, increasing the arrangement of torsional reinforcement at the midspan is recommended.

Key words： tunnel; primarysupport steel arch; concretesteel arch combination; early mechanical properties; steel performance coefficient; comparative test

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