重庆走马岭岩溶隧道涌水量初步研究
A PRELIMINARY STUDY OF WATER INTRUSION IN ZOUMALING KARST TUNNEL,CHONGQING
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摘要: 隧道涌水问题普遍存在,从隧道的施工到竣工运行都受其影响,特别是在南方岩溶地区尤为严重。根据勘察资料,走马岭隧道穿越可溶岩段(含断层破碎带)长1525m,占隧道总长的62%,极易发生隧道涌水事故。本文结合已开挖段隧道涌水的实时监测数据及前期工程勘察资料,对隧道涌水做出初步预测评价,为以后的施工提供依据。Abstract: The water intrusion is a common problem in tunnels,especially in southern karst area.It affects the whole process of tunnel construction and operation.According to the survey data,1525-meter long(62% of total length of Zoumaling tunnel) karst sector(including fault fracture zone) is prone to water intrusion.This paper presented a preliminary prediction of water discharge,which may be caused by continued tunnel excavation,based on real-time discharge monitoring data of excavated tunnel and project surveys.The results provide guidelines for control of potential water intrusion.