市政技术2025，Vol.43Issue(8)：36-44,53,10.DOI:10.19922/j.1009-7767.2025.08.036
浅埋大跨度隧道破碎带地层施工监测布置及变形规律研究
Study on Construction Monitoring Strategies and Deformation Patterns in Fractured Zones of Shallow-buried Large-span Tunnels
摘要
Abstract
In the construction process of large-span tunnel by drilling and blasting method,there're a series of challenges such as complex geological conditions,difficult monitoring and high requirements for deformation con-trol.Based on the construction of the land section of the second undersea tunnel of Jiaozhou Bay Subsea in Qingdao,the high risk and monitoring difficulty of excavating a shallow-buried large-span tunnel in the fault zone are ana-lyzed,and the monitoring layout principle based on the surrounding rock grade and excavation sequence is pro-posed;Secondly,the key data such as vault settlement,clearance convergence and surface settlement are taken as the necessary measurement items,and the monitoring parameters in the fault zone area are taken as the optional measurement items.The monitoring layout section of the tunnel is defined;Finally,based on the field measured data,the deformation laws of the main sections in the whole process of tunnel excavation are analyzed.The results show that:1)the deformation law in the process of tunnel excavation is that the deformation increases sharply after the pilot tunnel excavation,and tends to be stable after the fully excavation of the tunnel section;2)During the excavation of the back pilot tunnel and the removal of the intermediate rock pillar,the local surrounding rock stress release causes significant changes in the surface settlement.The research results can provide important reference and guidance for the section monitoring scheme of similar shallow-buried large-span tunnel engineering.关键词
浅埋大跨度隧道/断面监测/钻爆法/地表沉降/隧道结构受力Key words
shallow-buried large-span tunnel/section monitoring/drilling and blasting method/surface settlement/tunnel structure stress分类
交通工程引用本文复制引用
林树森,宁方端,漆伟强,王听听,魏玉超..浅埋大跨度隧道破碎带地层施工监测布置及变形规律研究[J].市政技术,2025,43(8):36-44,53,10.基金项目
国家重点研发计划(2023YFB2603605) （2023YFB2603605）
