岩土工程学报2017，Vol.39Issue(2)：218-227,10.DOI:10.11779/CJGE201702004
隧道三维电阻率E-SCAN超前探测反演与优化方法研究
3D E-SCAN resistivity inversion and optimized method in tunnel advanced prediction
摘要
Abstract
Advanced geological prediction is one essential part in tunnel construction, and 3D E-SCAN resistivity device is introduced. In this device, the current and measuring electrodes are arranged on the tunnel face, which can reduce the impact of interference factors. Then a new observing device is proposed. Geological models are designed, and features of the sensitivity matrix are obtained as follows: the absolute values of elements are vastly different; the values decrease sharply with depth; the elements close to the current and measuring electrodes achieve high absolute values. The gain factors with different values are imposed onto the elements in the sensitivity matrix, and the initial elements with high values are suppressed, with the elements with low values enhanced. An optimized inverse method is formed based on the gain factors, and it can promote the depth accuracy of the abnormal in inverse results theoretically. Numerical examples and physical model tests are performed. The results show that in the 3D E-SCAN resistivity detection, compared with the traditional smooth constraints inversion, the optimized inverse method has obvious advantages in positioning the abnormal body in depth.关键词
隧道超前预报/三维电阻率反演/E-SCAN/敏感度矩阵/光滑约束权重/增益优化Key words
tunnel advanced prediction/3D resistivity inversion/E-SCAN/sensitivity matrix/smooth constraint weight/gain optimization分类
建筑与水利引用本文复制引用
王传武,李术才,聂利超,刘斌,郭谦,任玉晓,刘海东..隧道三维电阻率E-SCAN超前探测反演与优化方法研究[J].岩土工程学报,2017,39(2):218-227,10.基金项目
国 家 重 点 基 础 研 究 发 展 计 划 (" 973 " 计 划 ) 项 目(2013CB036002,2015CB058101) （" 973 " 计 划 ）
国家重大仪器设备研制专项(51327802) （51327802）
国家自然科学基金重点项目(51139004) （51139004）
国家自然科学基金面上项目(51479104) （51479104）
国家自然科学基金青年科学基金项目(41502279) （41502279）
中国博士后科学基金项目(2015M572037) （2015M572037）
国家重点研发计划(2016YFC0401805) （2016YFC0401805）
