多孔介质非饱和入渗过程的地电响应  

Geoelectric response test of porous media in the process of infiltration

作　　者：丁小平 周万福 耿济世 苏天明[3] 王勃[2] 

机构地区：[1]宁夏公路建设管理局,银川750001 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]交通运输部公路科学研究院,北京100088

出　　处：《工程勘察》2016年第8期74-78,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(41102201);交通运输部西部交通建设科技项目(2013318J12330)

摘　　要：通过多层地质结构的土体渗透过程中不同部位的地电场响应特点试验,获得了多地层结构的土体渗水过程中地电场参数瞬时响应规律。根据激励电流可以反演得到地下水的渗流位置、渗流速度;当浸润面位置到达某个电极后自然电位迅速降低,激励电流迅速升高;根据激励电流响应所作浸润面高度与入渗时间关系线性规律良好,以此获得的渗流速度与观测值基本一致。渗流过程中土体地电场参数的变化有助于对地下水渗流规律的认识。The transient response rule of geoelectric field parameters in the process of infiltration through multi layer soils could be obtained by seepage-electric test. The seepage velocity and seepage position of groundwater can be obtained by inverse analysis of excited current. When the infiltration surface reaches a certain electrode,natural potential decreased rapidly,the excited current increased rapidly. There is a linear relationship between infiltration surface height and seepage time according to the exciting current response. The seepage velocity value obtained by excited current response is consistent with the observation. The changing rule of geoelectric field parameters could facilitate to the understanding of the laws of groundwater seepage.

关 键 词：入渗 地电场 参数响应 激励电流 自然电位 

分 类 号：TU43[建筑科学—岩土工程]