综合物探方法在复杂条件下场地安全性调查中的应用  

Application of integrated geophysical exploration methods to safety investigation of working site with complex conditions

作　　者：肖坤林 闫晓录 张健[1] 贾小杰 刘媛媛[1] XIAO Kunlin;YAN Xiaolu;ZHANG jian;JIA XiaoJie;LIU Yuanyuan(Geophysical Exploration Academy of China Metallurgical Geology Bureau,Baoding 071000,Hebei,China)

机构地区：[1]中国冶金地质总局地球物理勘查院,河北保定071000

出　　处：《地质找矿论丛》2024年第2期285-292,共8页Contributions to Geology and Mineral Resources Research

摘　　要：河北省唐山市某校拟建的建筑物位于第四系覆盖的岩溶发育区,该场地地质条件复杂,覆盖层较厚,且施工区域狭小,采用单一的物探方法很难取得理想的效果。本文采用微动法和高密度电法对场地进行勘察,查明了场地内的溶洞围岩构造特征、覆盖层厚度、可能存在的岩溶发育区及其它地质异常点;在场地勘察施工中,通过优化作业方式来改善原始数据信噪比,有效地指导了勘察工作。综合物探方法在复杂场地勘察中具有优越性,可为建筑物地基处理方案提供可靠依据。A building of a school proposed in Tangshan city,Hebei province,is located in an area where karst is develpoed and covered with relatively thick Quaternary sediment thus the geological condition is complicated,in addition to the thick cover the construction area is narrow and single geophysical exploration method can not obtain ideal result.Microtremor survey and high-density electrical survey are integrated to investigate the site.Structural characteristics of surrounding rock of karst,thickness of the cover and the possible karst development area and other geological anomalies are identified.During operation the SNR of the original data is improved by optimizing the operation mode.The construction site investigation is effectively guided with the results.Integration of geophysical exploration methods is superior in complex site investigation and can provide reliable basis for building foundation treatment scheme.

关 键 词：场地安全性调查 岩溶塌陷 微动法 高密度电法 河北唐山 

分 类 号：P631[天文地球—地质矿产勘探]