矿山法隧道揭露岩溶施工力学分析  

Mechanical Analysis of Karst Exposed Construction in Tunnel by Mining Method

作　　者：何晓勇 赖谋 费富华 范育辉 HE Xiaoyong;LAI Mou;FEI Fuhua;FAN Yuhui(China Railway Development and Investment Group Co.,Ltd.,Kunming Yunnan 650200,China;Southwest Jiaotong University,Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Sichuan Chengdu 610031,China)

机构地区：[1]中铁开发投资集团有限公司,云南昆明650200 [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

出　　处：《交通节能与环保》2023年第5期233-237,共5页Transport Energy Conservation & Environmental Protection

摘　　要：为研究贵阳市轨道交通3号线一期工程黔北区间矿山法施工揭露岩溶空腔问题,采用数值模拟方法对矿山法隧道施工揭露岩溶空腔及岩溶空腔处理施工全过程进行了动态模拟,研究结果表明:(1)隧道掌子面开挖至岩溶空腔处时,最大沉降值位于岩溶空腔内红黏土填充区;(2)岩溶空腔脱空回填后,隧道洞周变形进一步发生,但填充区基本不再发生沉降变形;(3)揭露岩溶过程时地表最终沉降曲线表现为深V型,岩溶空腔内填充物流失对隧道开挖时地表沉降影响较大。To study the karst cavities revealed during the mining method construction in northern Guizhou of phase I project of Guiyang Rail Transit Line 3,the dynamic simulation of the whole construction process of uncovering karst cavity and treatment of karst cavity during the tunnel construction by mining method is carried out by means of numerical simulation method.The research results show that:(1)when the working face is excavated to the karst cavity,the maximum settlement value is located in the red clay filling area in the karst cavity.(2)After the karst cavity is backfilled out,the deformation around the tunnel further occurs,but there is no settlement deformation in the filling area.(3)When the karst process was revealed,the final settlement curve of the surface showed a deep V shape,and the loss of the fill in the karst cavity had a great impact on the surface settlement during tunnel excavation.

关 键 词：地铁隧道 溶腔位置 数值模拟 施工力学分析 

分 类 号：U455[建筑科学—桥梁与隧道工程]