地下工程塌方的综合物探研究

Study of synthetic geophysical exploration method for collapsed underground engineering

当地下工程发生塌方失去对坍塌体进行直接探测的条件时,可采用物探方法查清塌方原因及其形态与规模。物探方法的选择应根据现场的实际工作环境及介质条件,并结合塌方距离地表的深浅,进行综合考虑。由于物性的多样化、物性层与地质层存在差异,单一的物探方法难免有误。采用综合物探方法,用多种参数从不同的物性角度进行观测分析、相互验证,才能获得最佳的探测效果。本文通过实例,介绍了地下工程塌方综合物探的工作方法及相关经验。

It is possible to adopt geophysical exploration method to find out the reason of collapse and its shape and scale when collapse happened in underground engineering and without the condition of detect collapse directly. To choose reasonable geophysical exploration method, many factors such as working condition of spot, medium qualification and the distance between collapse and the earth’s surface should be taken into account. Single geophysical exploration method may cause error because of the diversification of rocks and the differences between physical layers and geological lays. In order to obtain optimal effect, it should be better to analyse and validate different physical characters by using synthetic geophysical techniques. The authors introduce the synthetic geophysical method and correlation experience based on the application of this method to detecting a collapsed underground engineering.