破碎泥质岩隧道滞后形变与衬砌刚度关系规律试验研究

冯冀蒙; 李洪涛; 张俊儒; 丁晓琦; 陈政

doi:10.3973/j.issn.2096-4498.2018.07.012

隧道建设 >

2018 , Vol. 38 >Issue 7: 1164 - 1171

DOI: https://doi.org/10.3973/j.issn.2096-4498.2018.07.012

研究与探索

破碎泥质岩隧道滞后形变与衬砌刚度关系规律试验研究

冯冀蒙 ,
李洪涛 ,
张俊儒 ,
丁晓琦 ,
陈政

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(1. 西南交通大学土木工程学院，四川成都 610031； 2. 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)

冯冀蒙（1986—），男，内蒙古察右前旗人，2013年毕业于西南交通大学，桥梁与隧道工程专业，博士，讲师，主要从事隧道及地下结构全寿命期安全性研究。Email： fengjm@home.swjtu.edu.cn。 *通信作者：张俊儒， Email： jrzh@home.swjtu.edu.cn。

收稿日期: 2018-03-19

修回日期: 2018-04-13

网络出版日期: 2018-07-28

基金资助

国家自然科学基金资助项目(51378435，51508476)

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Experimental Study of Relationship between Hysteretic Deformation and Lining Stiffness of Fractured Argillaceous Rock Tunnel

FENG Jimeng ,
LI Hongtao ,
ZHANG Junru ,
DING Xiaoqi ,
CHEN Zheng

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(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Received date: 2018-03-19

Revised date: 2018-04-13

Online published: 2018-07-28

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摘要

为了解破碎泥质岩隧道滞后变形与衬砌刚度的关系，以云桂铁路小寨隧道工程为依托，通过室内模型试验对小寨隧道实际开挖、支护及支护完成后围岩的劣化过程进行模拟，对围岩劣化过程中二次衬砌的围岩压力、位移及内力的变化规律进行研究。研究结果表明：衬砌刚度对于控制泥质岩隧道滞后变形有着重要的影响；二次衬砌的刚度越大，其承受的围岩压力及内力越大，则最大弯矩越大，容易出现开裂；针对小寨隧道的实际情况，30 cm的初期支护+I25b型钢钢架+40 cm的C35钢架混凝土二次衬砌是较优的支护结构设置。

关键词： 破碎泥质岩隧道; 滞后变形; 衬砌刚度; 模型试验

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冯冀蒙 , 李洪涛 , 张俊儒 , 丁晓琦 , 陈政 . 破碎泥质岩隧道滞后形变与衬砌刚度关系规律试验研究[J]. 隧道建设, 2018 , 38(7) : 1164 -1171 . DOI: 10.3973/j.issn.2096-4498.2018.07.012

Abstract

The deterioration processes of surrounding rock of Xiaozhai Tunnel on YunGui Railway during excavation and supporting and after supporting are simulated by laboratory model experiments; and the surrounding rock pressure, displacement and internal force of the secondary lining are studied during deterioration progress. The study results show that: (1) The stiffness of the lining has an significant influence on the deformation control of argillaceous rock tunnel. (2) The larger the stiffness of the lining is, the larger the surrounding rock pressure, the internal force and maximum bending moment are, and the lining is more prone to cracking. (3) For the actual situation of Xiaozhai Tunnel, primary support with a thickness of 30 cm + I25b steel frame + C35 reinforced concrete with a diameter of 40 cm is a better supporting structure.

Key words： fractured argillaceous rock tunnel; hysteretic deformation; lining stiffness; model test

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