地震反射波法在宜万铁路岩溶探查中的应用

由于隧道的场地条件和复杂的地球物理环境,对于复杂的岩溶隧道隧底隐伏岩溶的探查存在不少方法和技术上的困难。宜万铁路沿线碳酸盐岩广泛分布,地表岩溶类型齐全、形态各异,地下岩溶洞穴、暗河特别发育,并由断层连通地面、地下水系,其地形和地质的复杂程度非常复杂。因此,采取有效措施,查明隧底隐伏岩溶的规模、位置和空间形态,判研隐伏岩溶危及运营安全的程度,以进行有效处理,确保运营安全具有非常重要意义。本文结合宜万铁路隧底隐伏岩溶探查的实践,重点介绍应用地震反射技术对已知隧底隐伏岩溶探查的方法和效果,总结和归纳出宜万隧道隧底溶洞的地震波场振幅和频率特征,对指导全线其它隧道隧底岩溶勘查具有一定的指导意义。

The Application of the Exploration of Karst Yiwan Railway Using Seismic Reflection Method

The conditions of Yiwan railway are the most difficult due to the complex Karst and the complex terrain.In order to avoid the diaster in the tunnels along the Yiwan railway,several surface geophysical exploration methods were used to explore Karst under the tunnel.We found that the sesimic reflection method is the most efficient and effective method for the exploration of Karst of Yiwan railway due to the explicit characteristics of amplitude and frequecy of seismic waves.