地震映像法在隧底岩溶探测中的应用效果研究

结合既有线工程实际，已修建的贵昆、襄渝、成昆、宜万铁路都遭遇大量岩溶地质灾害，岩溶对隧道工程的危害不仅体现于施工方面，在后期运营过程中也会构成威胁。有岩溶出现的隧道工程，极易造成塌方，伴随涌水、突泥等现象，甚至出现坍塌，造成隧道施工停工和人员伤亡以及财产损失，后期运营工程中，隧道隐伏岩溶具有较强的隐蔽性且构成对行车安全的威胁，是不容忽视的地质灾害之一。沪昆高铁长沙至贵阳段所经过的贵州广大地区，岩溶喀斯特发育广泛。因此，查明隧底岩溶的分布情况显得尤为重要。采用地震映像法探测隧底岩溶，可以查明岩溶的分布情况，为岩溶的整治处理提供有力资料，可以减少不必要的损失。本文阐述了地震映像法的基本原理、工作方式、解释原则，并结合某隧道进行分析，探明了多处溶蚀带和溶洞，证明该方法法在隧底岩溶的探测中是切实可行的。

AN EFFECT ANALYSIS OF THE SEISMIC IMAGING METHOD IN THE KARST EXPLORATION OF TUNNEL

The Guiyang-Kunming, Xiangfan-Chongqing Yichang-Wanzhou and Chengdu-Kunming railway lines in China have suffered a lot of karst geological disaster. Combined with these obout existing engineering, the harm of karst on tunnel engineering is reflected not only in construction, in the post-operation process will also pose a threat. During the construction of tunnel engineering that karst have appeared, landslides is very vulnerable to happen, go with water gushing, burst mud and other phenomena, even collapse will appear, which cause downtime of tunnel construction and casualties and property losses. During post-operation process, the covered karst with a strong concealment and will pose a threat to traffic safety. In a word, the tunnel karst is one of the geological disasters can not be ignored. In the vast section of Guizhou area, which the high-speed railway of Shanghai-Kunming line cross, the karst developed widely. The hidden karst under the tunnels has a strong concealment and will be a threat to the safety of the train. Therefore, it is essential and important to find out the distribution of the hidden karst. This paper mainly talk about the basic principles and how it works about the seismic imaging method, combined with on tunnel, we found many karst cavities and fractured zones, and proved this method is effective and efficient in the complicated geologic condition.