基于模型试验的双侧壁导坑法施工过程模拟研究  

Simulation Research on the Construction Process of Double Side-wall Pilot Tunnel Method Based on Model Test

作　　者：冯展 郑国平[1,2] 庄一舟 孙海涛 Feng Zhan;Zheng Guoping;Zhuang Yizhou;Sun Haitao(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Hangzhou Xin'ao Civil Engineering Technology Co.,Ltd.,Hangzhou 310051,China;Nuclear Industry Jingxiang Construction Group Co.,Ltd.,Huzhou 313000,China)

机构地区：[1]浙江工业大学土木工程学院,杭州市310014 [2]杭州新奥土木工程技术有限公司,杭州市310051 [3]核工业井巷建设集团有限责任公司,湖州市313000

出　　处：《北方交通》2023年第10期63-67,72,共6页Northern Communications

基　　金：浙江省交通运输厅科研计划项目(2021-GCKY-04)。

摘　　要：为了研究双侧壁导坑法施工过程中的围岩力学特性和位移特征,以在建大罗山隧道工程为例,采用相似模型试验进行模拟分析,研究了开挖过程中围岩的应力变化和地表沉降,以及隧道开挖完成后附加荷载作用下围岩的应力特征和衬砌裂缝发展情况。试验结果表明:在隧道开挖阶段,越靠近隧道周边的围岩应力监测点,围岩应力变化越大,且围岩应力变化从大到小依次为拱肩切向应力、拱顶竖向应力、拱腰竖向应力、拱腰切向应力。In order to study the mechanical and displacement characteristics of the surrounding rock during the construction process of the double side-wall pilot tunnel method,the similar model test is used to simulate and analyze and study the stress changes and ground surface settlement of the surrounding rock during the excavation process by taking Daluoshan tunnel engineering under construction as the example,as well as the stress characteristics of the surrounding rock and the development of lining cracks under the additional load after the completion of tunnel excavation.The test results show that:during the stage of tunnel excavation,the closer the surrounding rock stress monitoring point is to the tunnel periphery,the greater the change of the surrounding rock stress is,and the stress changes of the surrounding rock are in descending order:tangential stress at the arch shoulder,vertical stress at the arch crown,vertical stress at the arch waist,and tangential stress at the arch waist.

关 键 词：隧道工程 围岩应力 双侧壁导坑法 相似模型试验 

分 类 号：U455[建筑科学—桥梁与隧道工程]