摘要
某艰险山区铁路隧道是重要的控制工程,区域构造运动活跃、工程地质环境极为复杂,需穿越上三叠统波里拉组灰岩条带,岩溶突涌水问题突出。为了准确评价隧道涌突水的危险性,通过地质调绘、深孔钻探等手段,对隧道水文地质特征进行精细的调查和深入的分析,探明隧道岩溶发育特征及范围,将隧址区地下水径流系统分为局部表层、浅层和区域深层径流系统,并遵循多元、多层次的分析评价思路,选取不同评价指标,构建非可溶岩段和可溶岩段隧道涌突水危险性评价体系。评价结果显示,隧道涌突水问题总体以较低危险性为主,高和极高危险段仅约占隧道总长的4%和1%,主要受控于波里拉组灰岩条带和额艾顿断裂带。
A railway tunnel in a difficult and dangerous mountain area is an important control project.The regional tectonic movement is active,and the engineering geological environment is extremely complex.In order to prepare to evaluate the risk of water inrush in the tun-nel,the hydrogeological characteristics of the Tunnel were investigated and analyzed in depth by means of geological mapping,deep hole drilling,etc.The groundwater runoff system in the site area is roughly divided into local surface runoff system,shallow runoff system and regional deep run off system,and following the multiple and multilevel analysis and evaluation ideas,different evaluation indicators are selected to construct tunnel surges in the insoluble rock section and the soluble rock section.According to the evaluation system of water inrush risk,it is concluded that the water inrush problem in the Tunnel is mainly of low risk,and the high and extremely high risk sections only account for about 4%and 1%of the total length of the tunnel,which is mainly controlled by limestone(T3b)and Eaideng fault zone.
作者
贾杰
覃礼貌
于振涛
谢荣强
罗元冲
JIA Jie;QIN Limao;YU Zhentao;XIE Rongqiang;LUO Yuanchong(China Railway Eryuan Engineering Group Co.Ltd,Chengdu 610031,Sichuan,China;Southwest Jiaotong University,Chengdu 610031,Sichuan,China)
出处
《西北地质》
CAS
CSCD
北大核心
2023年第3期258-267,共10页
Northwestern Geology
关键词
铁路隧道
岩溶
涌突水
危险性评价
railway tunnel
karst
water inrush
risk assessment
