岩土力学2017，Vol.38Issue(1)：300-308,9.DOI:10.16285/j.rsm.2017.01.038
钻孔雷达探测地下不良地质体的正演模拟及其复信号分析
Forward simulation and complex signal analysis of borehole radar detection for underground adverse geological bodies
摘要
Abstract
Engineering construction usually encounters adverse geological phenomena such as karst caves,fractures and faults.Thus,it is extremely significant for maintaining security to ascertain the adverse geological bodies in particular the conditions containing water.Borehole radar is an effective detecting method,however the issues in terms of forward simulation and complex signal analysis of adverse geological bodies have not been well addressed.To improve the precision and accuracy of interpretation,the complex signal analysis technique which utilizes instant information including amplitude,phase and frequency is adopted to analyze detected results.A numerical model is developed for adverse geological bodies with water and without water,and then GprMax,a ground penetration radar forward simulation software,is applied to implement the forward simulation.Numerical results are further analyzed by a complex signal analysis technique to obtain the response characteristics of adverse geological bodies.In particular,adverse geological bodies containing water enhance the amplitude of reflected signal,reverse the phase,and reduce the frequency.Finally,detected results from a case study are analyzed by using the borehole radar with the complex signal analysis technique.Numerical and field detecting results demonstrate that the complex signal analysis technique has the advantage to analyzing the morphological distribution and the water situation in adverse geological bodies.In addition,it increases the precision and accuracy of the data interpretation.关键词
不良地质体/钻孔雷达/正演模拟/响应特征/复信号分析Key words
adverse geological bodies/borehole radar/forward simulation/response characteristics/complex signal analysis分类
建筑与水利引用本文复制引用
李尧,李术才,刘斌,聂利超,张凤凯,徐磊,王传武..钻孔雷达探测地下不良地质体的正演模拟及其复信号分析[J].岩土力学,2017,38(1):300-308,9.基金项目
国家重点基础研究发展计划(973计划)项目(No.2013CB036002,No.2015CB058101) （973计划）
国家重大科研仪器设备研制专项(No.51327802) （No.51327802）
国家自然科学基金重点项目(No.51139004) （No.51139004）
中国工程院咨询项目(No.2015-05-ZD-002).This work was supported by the National Program on Key Basic Research Project of China (973 program) (2013CB036002,2015CB058101),the National Key Scientific Instrument and Equipment Development Project (51327802),the Key Program of National Natural Science Foundation of China (51139004) and the Consulting Research Project of Chinese Academy of Engineering (2015-05-ZD-002). （No.2015-05-ZD-002）
