钻探与物探在岩溶勘测中的综合应用

Introduction to the Integrated Application of Drilling and Geophysical Prospecting in Karst Survey

在城市轨道交通工程中,为了更加准确地探明岩溶的发育情况,采用钻探与物探相结合的方法,对岩溶发育区域进行勘测。其中,钻探的主要作用是揭露岩溶发育的具体位置与深度等数据;物探(地震反射波法)的作用是对整个作业区域的岩溶发育情况进行勘测,判断岩溶发育区域的大致分布范围;最后,对钻探与物探的成果进行综合分析,得出准确的岩溶发育范围。以广州市地铁某车站为例,采用钻探与物探相结合的综合勘测方法,对该车站的岩溶发育情况进行勘测;勘测结果表明,该车站岩溶发育强烈且集中,见洞率高达50%,为后续岩溶处理提供了可靠的依据。

In the urban rail transit engineering, in order to ascertain the karst development situation more accurately, the paper adopts a survey method that is the combination of drilling and geophysical prospecting to survey karst development areas. In this method, the main function of drilling is to expose the data of karst development, including the location, depth, and so on;geophysical prospecting (seismic reflection wave method) is used to survey the karst development situation of the whole operational areas for judging the general distribution of karst development area;comprehensive analysis of drilling and geophysical exploration results is conducted, so as to give a good indication of karst development scope. Taking a subway station in Guangzhou as an example, the paper adopts the comprehensive survey method above to survey karst development conditions of the station;the results of the survey show that the karst development of the station is intense and concentrated, and the probability of karst cave is as high as 50%, providing a reliable basis for subsequent karst processing.