高密度电法在高填方工程填土厚度探测中的应用

Application of High Density Electrical Method in Detecting Fill Thickness of a Filling Engineering

对于高填方工程来说,查明填土的厚度对工程建设有不可忽视的重要性。本文以湖南长沙某大面积填方工程为研究背景,工程场地原为丘陵地貌,现场地经土方施工整平作为建筑场地。由于工期紧迫,要求采用快速、经济、准确的方法探测场地填方区填土厚度。该文采用高密度电法方法中温纳、施伦贝(谢)尔两种排列装置在场地填方区有代表性的区域划分试验区探测填土厚度,并通过钻孔辅助验证了探测填土厚度的准确性,勘测结果显示采用施伦贝(谢)尔装置取得了较好效果,为本场地进一步大面积填土探测工作提供了物探的定性解释依据。

Finding out the filling thickness is often considered as foundamental in high fill projects.This paper takes a large landfill area in Changsha,Hunan province,as the project site,which was originally hilly landform,and was leveled by earthwork construction as the construction site.Due to the tight construction period,a rapid,economical and accurate method is adopted to detect the fill thickness in the site.The high-density electrical method,Wenner and Schlumberg are used,by two arrangement devices to sample the experimental area for filling thickness detection.The accuracy of detecting the fill thickness was verified by drilling,the survey result shows that the Schlumberg(Scheer)device has achieved good results,where it provides a qualitative interpretation basis for geophysical exploration for further large-area fill detection of the site.