摘要
本次研究将高密度电法用于某工程地下输水隧洞探测,对比了斯伦贝谢装置与温纳装置视电阻率剖面成果差异,分析了Res2dinv软件中组合反演法与阻尼最小二乘反演法的差异,依据电法探测成果推断了地下输水隧洞的走向与埋深。结论表明,斯伦贝谢装置较温纳装置更能凸显地下管状物的电阻率异常;Res2dinv软件中阻尼最小二乘反演方法易掩盖小尺度管状异常体在水平方向上的电阻率变化特征,原始视电阻率剖面成果能更好的反应隐伏输水隧洞的电阻率异常;组合反演方法可提高电阻率法探测埋深较大、规模较小管状异常体的横向分辨率。
In this paper,the high-density electricity method is used to detect the underground water conveyance tunnel.After comparing the difference of apparent resistivity profile results between Schlumberger device and Wenner device,and the difference between combined inversion method and damped least square inversion method in Res2dinv software is analyzed.Several conclusions are drawn as follows.Firstly,the resistivity anomaly of underground tubular object is more prominent in Schlumberger device than in Winner device.Secondly,the Levenberg-Marquardt inversion method contained in Res2dinv software can easily conceal the horizontal resistivity variation characteristics of small-scale tubular anomalous body and the results of original apparent resistivity profile can better reflect the resistivity anomaly of hidden water conveyance tunnel.Thirdly,the combined inversion method can improve the horizontal resolution of resistivity method for detecting tubular anomalous body with larger burial depth and smaller scale.
作者
李伟
李俊杰
Li Wei;Li Junjie(Chongqing Survey Institute,Chongqing 400020,China;Zhejiang Design Institute of Water Conservancy and Hydroelectric Power,Hangzhou Zhejiang 310002,China)
出处
《工程地球物理学报》
2021年第6期938-943,共6页
Chinese Journal of Engineering Geophysics
基金
国家自然科学基金项目(编号:41641040)。
关键词
高密度电法
隐伏输水隧洞
斯伦贝谢装置
温纳装置
组合反演
high density electricity method
concealed water conveyance tunnel
Schlumberger device
Winner device
combined inversion method
