铁道标准设计2024，Vol.68Issue(1)：146-154,9.DOI:10.13238/j.issn.1004-2954.202206250002
正断层错动作用下矿山法隧道受力变形机理的模型试验研究
Model Test Research on Stress and Deformation Mechanism of Mining Tunnel Under Normal Fault Dislocation
摘要
Abstract
In order to study the mechanism of force and deformation of mining tunnel under the action of normal fault dislocation,taking the Qingdao No.2 submarine tunnel crossing the F3 Cangkou Fault as a project,the self-developed large-scale tunnel structure failure loading test device through the fault is used to meet the working conditions of different segment connection forms(rigid connection,hinged connection)and different segment widths.carry out a model test of normal fault dislocation with a mining method tunnel crossing dip angle of 70° with a geometric similarity ratio of 1 ∶ 40.The key indicators such as tunnel deformation,strain distribution,surrounding rock contact pressure and failure characteristics during the dislocation test were monitored,and the laws of tunnel deformation and mechanical response under the action of normal fault dislocation were analyzed and obtained.The research results show that:(1)Under the action of normal fault dislocation,the tunnel presents a load mode of longitudinal tension and bending+vertical compression.(2)A void appears in the area.The tunnel cracks are mainly longitudinal through cracks,and some oblique cracks and circumferential cracks also appear in the lining near the fault plane.(3)The connection form and segment length between segments will not fundamentally change the load mode and deformation mode of the tunnel under the action of fault dislocation,but the smaller the inter-segment stiffness,the smaller the segment length,and the structural impact on the formation.(4)Compared with the rigid connection,the flexible connection between the segments absorbs most of the forced dislocation of the stratum,effectively reduces the load and deformation of the lining segment,and the structure tends to be safer.关键词
海底隧道/矿山法隧道/断层错动/正断层/模型试验/铰接设计/脱空区Key words
subsea tunnel/mining tunnel/fault dislocation/normal fault/model test/articulation design/void area分类
交通工程引用本文复制引用
武哲书,孙文昊,陈峻博,王天强,王琦,陈立保..正断层错动作用下矿山法隧道受力变形机理的模型试验研究[J].铁道标准设计,2024,68(1):146-154,9.基金项目
中铁第四勘察设计院集团有限公司科研开发课题(2019K037) （2019K037）
中国博士后科学基金资助项目(2021M693698) （2021M693698）
