关角隧道突涌水机理分析及处治技术

摘要

为保证关角隧道顺利穿越岩溶富水区，通过现场调查、连通试验及对隧道突涌水水文地质概念模型的分析，研究关角隧道突涌水发生的机理。研究结果表明，关角隧道突涌水属揭穿型，受蓄水构造和降雨的影响明显。对隧道掌子面、洞身突涌水模式进行了理论分析，对不同的突涌水模式制订了针对性的超前地质预报、注浆或地表导流方案。论述了突涌水预防和治理方案的应用条件、施工工艺和技术要点。%T he paper aims to study the reasons of gushing water in Guanjiao tunnel,with the purpose of leading the tunnel out from the karst water-rich area. W ith that in mind,it takes the approaches of in-situ investigation, connected tests and model simulation of the surrounding geo-hydraulic environment. T he research points out that the gushing w ater is subjected to the storage structure and rainfall. In this light,the paper carried out theoretical analysis on the w orking face and the body of such tunnel,and further proposes geological alarm ,grouting,and surface discharge as solutions. Beyond that,conditions and techniques for such precautions scheme and treatment measures are outlined as w ell.