高频地震反射法在大坪隧道施工中的应用

随着西部大开发战略的实施,我国西部地区公路隧道工程的数量越来越多,工程等级也不断提高。然而在隧道施工中难免会遇到诸如岩溶突水、岩爆、围岩大变形、塌方等地质灾害问题,为了将地质灾害影响程度降到最低,在隧道施工前进行地质超前预报是十分必要的。文章以大坪隧道为例,介绍了TGP12(高频地震反射法)探测系统的原理、数据处理、解译技术,通过对比分析验证了预报结果的准确性,并总结了应用TGP12进行地质超前预报的体会,展示了TGP12探测系统在隧道施工地质超前预报中的广阔应用前景。

Application of high -frequency seismic reflection method in the construction of Daping tunnel

With the implementation of the strategy of developing the western regions of China,there are more and more highway tunnel projects built in western regions while their grades are also raising.As geologic conditions of the projects are complex,they are unavoidable to encounter with some geologic hazards such as karst water gushing,rock outbursts,high deformations or collapses of surrounding rocks.To minimize geological disasters,applying advance geological prediction before tunnel excavation is necessary.This article,citing Daping tunnel as example,introduces the principles,data processing and explanation technology of TGP12(High-frequency seismic reflection method).The accuracy of the forecasted results has been confirmed through contrast analyses,and the experience of TGP12 geology forecast has been summed up.The broad application prospect of the TGP12 tunnel geological forecast system in the tunnel construction geological prediction has been highlighted.