Application of Geophysical Technology in Soil Information Detection in a Tidal Flat Development Plot
Potential pollution hazards such as reclamation with contaminated soil or illegal landfill of solid waste was exited in tidal flat.It is very important to master the soil information such as the filling range,landfill vol-ume and soil mechanical composition of the land to be developed in the soil pollution investigation.Geophysical exploration technology has the advantages of less destructive,high investigation efficiency and continuous de-scription range.By using a variety of geophysical techniques to assist each other,the result presentation and borehole sampling correction can be better applied to this type of soil information detection to meet the short in-vestigation time and cost-effective requirements.Electromagnetic method and Electrical Resistivity Imaging method were used to distinguish the backfill area and the original soil area of the tidal flat development site,ser-ving the formulation of sampling scheme and pollution status analysis of follow-up pollution investigation.The results showed that the soil in the filling area were mainly composed of sandy soil and sandy clay without metal objects such as underground storage tanks or sludge with high metal content.The filling area was about 65 000 m2,and the results of geophysical exploration method were highly consistent with the field investigation and drilling results.The number of sampling points could be reduced by at least 50 through the geophysical ex-ploration,the cost of soil investigation could be reduced by at least 157,000 yuan.The investigation mode in this study provided a typical case for the early soil information collection of the similar urban filling sites.
万方数据
维普
