北京地区土壤视电阻率的差异探讨  

Analysis on the differences of soil apparent resistivity in Beijing area

作　　者：王世岐 谢芳[1] 赵刚[1] 戴国锋[1] Wang Shiqi, Xie Fang, Zhao Gang, Dai Guofeng(CIGIS （CHINA） LIMITED, Beijing 100007, China)

机构地区：[1]建设综合勘察研究设计院有限公司,北京100007

出　　处：《工程勘察》2018年第4期75-78,共4页Geotechnical Investigation & Surveying

摘　　要：本文通过对北京地区土壤视电阻率的实测值进行统计分析,总结了北京区域的实测视电阻率数据分布规律为西部及北部数值偏高,向东南方向逐渐降低。通过对不同地层中土壤视电阻率数值进行对比,认为在地面测得的岩体视电阻率不仅受岩石矿物成分及致密程度影响,更主要的影响因素是岩体完整程度、岩体质量等级、裂隙填充物成分、裂隙水情况等;卵石层顶面埋置深度以及地下水埋藏条件是视电阻率实测数值大小的主要决定因素;土及砂层的视电阻率则离散性较大。本文对土壤电阻率差异的探讨,对视电阻率的实际应用具有指导意义。Based on the analysis of the measured apparent resistivity in Beijing area,it is summarized that the actual data of apparent resistivity in Beijing area have the tendency that the apparent resistivity in western and northern is high and it becomes lower to the southeast direction gradually; the data of rock mass is not only because of the physical properties of rock,but also because of the rock intact degrees,the quality grade of rock mass,the fissure filling substance and the fissure water; the depth of the top surface of cobble strata and the depth of underground water are the main factors for measuring apparent resistivity;the data of soil or sand strata are greatly dispersed. Through exploring the differences of apparent resistivity in different strata,the study is of the guide significance for the application of apparent resistivity.

关 键 词：土壤电阻率 视电阻率 岩土工程勘察 等极距四点法 

分 类 号：P631.3[天文地球—地质矿产勘探]