填海地基电阻率成像正反演模拟及在工程中的应用

Application of forward and reverse modeling of resistivity tomography in the project with reclamation soil

为了查明填海地基是否存在地质隐患、海底基岩面、隐伏断裂等,采用高密度电阻率层析成像方法进行探测,从正反演模拟的结果来看是一种可行的方法。在研究区布设3条高密度电阻率成像测线,结合地质钻孔进行资料解释,该方法对填海地基及其深部的隐伏断裂、基岩面、回填区不良地质体的勘探取得了较好的勘探效果,达到了设计目标要求。研究区布设有大量的地质钻孔,区域地质资料齐全,结合本次勘探结果,高密度电阻率层析成像方法正模拟结果与实际测量结果吻合较好,认为在类似工程勘察中采用该方法是行之有效的。

The resistivity tomography method is used to figure out whether there is the geological hidden trouble, the bedrock surface or the buried faults below the seabed by analyzing the results of the forward and reverse modeling. The data from three survey lines with high density are used to do resistivity tomography, and the results combining with the information from geological drilling are discussed. The results show that it is an effective method for the detection of reclamation soil, buried faults, bedrock surfaces and harmful geological structures in the back filled region. A lot of geological drillings are set up in the study areas where there is the complete regional geological data. Combined with the results of the exploration, the high-density resistivity tomography method is of the similar results with the actual measurement results, which i^s an effective method for the investigation of similar engineering projects.