综合物探在河北涞源明长城下采空塌陷区勘察中的应用

The Application of Comprehensive Geophysical Prospecting to the Survey of Goaf Collapse in the Great Wall of Hebei Laiyuan

针对河北涞源明长城所处地形陡峭的特殊场地条件,为查明其地下采空区及其近地表塌陷裂隙分布,在充分分析了现有物探方法的可行性基础上,提出了瞬变电磁测深(TEM)法和探地雷达(GPR)法组成的综合物探方法,既能适用场地条件的不利限制,又可通过不同方法间的优势互补,实现对本次勘察精度的需要。实践表明,该种综合物探方法组合模式得到了较好的勘察效果,其成果对同类勘察工作具有十分有益的指导或借鉴意义。

According to the special site conditions of steep terrain in the Great Wall of Ming Dynasty of Hebei Laiyuan, in order to find out the distribution of goaf underground and the fracture near surface, based on the full analysis of the feasibility of existing geophysical method, we propose the method of comprehensive geophysical prospecting： the transient e- lectromagnetic sounding （TEM） method and the ground penetrating radar （GPR） method. It can not only suit the limit of the site conditions, but also meet the need of the survey pre- cision from the complement of advantages from the complement of advantages. The practice shows that this kind of method of comprehensive geophysical prospecting has a good explo ration effect and the result has very useful guidance and reference for the similar work.