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

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

doi:10.3973/j.issn.2096-4498.2022.10.003

Tunnel Construction >

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

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

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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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

Cite this article

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

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

[J]. Tunnel Construction, 2022 , 42(10) : 1693 -1702 . DOI: 10.3973/j.issn.2096-4498.2022.10.003

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