仰拱步距和台阶长度对软岩大断面隧道稳定性影响分析

史继尧; 王玥

doi:10.3973/j.issn.1672-741X.2017.04.007

隧道建设 >

2017 , Vol. 37 >Issue 4: 428 - 434

DOI: https://doi.org/10.3973/j.issn.1672-741X.2017.04.007

研究与探索

仰拱步距和台阶长度对软岩大断面隧道稳定性影响分析

史继尧 ,
王玥

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（中铁隧道集团有限公司勘测设计研究院，广东广州 511455）

史继尧（1976—），男，河南平顶山人，2010年毕业于河南理工大学，工程力学专业，硕士，工程师，现从事山岭隧道监控量测及科研工作。Email: 306344547@qq.com。

收稿日期: 2016-05-09

修回日期: 2016-12-26

网络出版日期: 2017-04-28

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Analysis of Influence of Invert Arch Step Distance and Bench Length on Stability of Large Crosssection Soft Rock Tunnels

SHI Jiyao ,
WANG Yue

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(Survey, Design and Research Institute of China Railway Tunnel Group Co., Ltd., Guangzhou 511455, Guangdong, China)

Received date: 2016-05-09

Revised date: 2016-12-26

Online published: 2017-04-28

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摘要

在软岩大断面隧道施工过程中，围岩稳定性控制难度很大。依托宝兰客专古城岭隧道的勘察设计资料、施工工艺和监测数据，建立符合工程实际的基本数值模型，分析软岩大断面隧道的变形特点，揭示仰拱步距和台阶长度对初期支护变形的影响规律。根据模拟试验结果指导古城岭隧道大变形区段施工，将初期支护累计变形减小了70%。

关键词： 软岩大断面隧道; 仰拱步距; 台阶长度; 数值模拟; 初期支护变形; 结构内力; 围岩稳定性

本文引用格式

史继尧 , 王玥 . 仰拱步距和台阶长度对软岩大断面隧道稳定性影响分析[J]. 隧道建设, 2017 , 37(4) : 428 -434 . DOI: 10.3973/j.issn.1672-741X.2017.04.007

Abstract

The control of stability of surrounding rocks is difficult during construction of large crosssection soft rock tunnel. A numerical model of Guchengling Tunnel on BaojiLanzhou Passengerdedicated Railway is established based on surveying and design data, construction technology and monitoring data. The deformation characteristics of large crosssection soft rock tunnels are analyzed and the influence of invert arch step distance and bench length on stability of large crosssection soft rock tunnels is revealed. The numerical test results are regarded as guidance for construction of large deformation section of Guchengling Tunnel, the accumulated deformation of primary support has been reduced by 70%.

Key words： large crosssection soft rock tunnel; step distance of invert arch; bench length; numerical simulation; primary support deformation; internal force of structure; stability of surrounding rock

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