物探综合方法在河床覆盖层探测中的试验研究  

Test research on applying the synthetic geophysical checking method to checking deep and tlfick sandy gravel layer on the riverbed

作　　者：许煜东[1] 王波[1] 皮开荣[1] 孙永清[1] 

机构地区：[1]中国水电顾问集团贵阳勘测设计研究院,贵州贵阳550002

出　　处：《水电勘测设计》2006年第4期24-27,共4页

摘　　要：在深厚覆盖层上建坝，对覆盖层的加固与防渗处理是关系到工程能否充分发挥效益并确保工程安全运行的关键问题。其中，如何对河床覆盖层厚度及组成进行快速、准确的探测，是防渗和加固处理的前提，本文采用连续电导率成像法（EH-4），地震反射法，瑞利波法等物探方法对河床覆盖层进行快速探测试验，并研究了在强干扰，接地条件差，地表藕合条件不理想等情况下开展物探快速探测的方法，取得了良好的效果。It is the key to the project＇ s full play and safe operation to study the seepage and consolidation treatment technologies of deep and thick sandy gravel layer on the riverbed during the scope of 0 - 70 m under hydraulic structures, especially of 0 - 30m, and make the layer as the proper foundation for permanent structure. And how to check the thickness and composition of the sandy gravel layer on the riverbed rapidly and accurately is the precondition of the seepage and consolidation treatment. In the paper, geophysical checking methods including successive electric conductivity imaging process （EH -4）, seismic reflection method and Reyleigh Wave method etc. are adopted in a rapid checking test on the sandy gravel layer on the riverbed, the method of rapid geophysical checking under poor conditions of strong interference, bad connection with earth, and bad coupling of ground surface is also studied, and good effects are achieved.

关 键 词：河床覆盖层 快速探测 连续电导率成像法(EH-4) 瑞利波法 地震反射法 

分 类 号：TU411.3[建筑科学—岩土工程]