综合地质预报技术在坛厂隧道施工中的应用

Application of Comprehensive Geological Prediction Technology to the Tanchang Tunnel

文章介绍了坛厂隧道施工中存在的主要工程地质问题(浅埋破碎、煤层瓦斯、断层破碎带、岩溶及涌水突泥等),以及地质超前预报的重点和难点;针对施工中采用的"以地质法为基础、以HSP声波反射法为主要手段、结合电磁波反射法的综合预报技术",并结合隧道进口浅埋段和中部岩溶涌水突泥段的预报情况进行了研究分析。隧道施工开挖揭露的情况表明,预报结果与实际开挖揭示吻合率较好,对本隧道工程施工起到了积极的指导作用,为隧道安全施工提供了技术保障。

This paper presents the main geological problems encountered （shallow overburden, coal seam, gas, fractured zone, fault, karst, water and mud bursts, etc.） and the key points and difficulties of geological prediction in the Tanchang Tunnel. In addition, a detailed analysis of the geological prediction of water and mud burst occurrences in the shallow-buried portal and middle karst sections is discussed in light of the HSP （Horizontal acoustic reflection） prediction technique combined with echolocation. Construction demonstrated that the prediction results agreed very well with the actual situation.