基于三维地质建模技术的溶土洞精细化勘察

Fine investigation of karst and soil cave based on 3D geological modeling

常规岩土工程勘察结合三维地质建模技术是实现未来精细化(三维)勘察的发展之路。基于EVS三维地质建模软件,依托某建设项目的常规岩土工程勘察资料,对场地中溶土洞的三维勘察进行了研究,研究了如何把离散的二维勘察孔数据通过三维地质建模,采用邻点法的算法,形成可视化的三维地质模型。基于可视化的三维地质模型,分析了场地内溶土洞的分布情况及体积,为溶土洞处理提供了可靠依据。实践证明,利用可视化的三维地质模型,在处理溶土洞,水泥使用量比实际值少14%,化学浆液使用量比理论值少24%,工期比实际工期节约20 d,费用比实际费用节约24%。

The combination of conventional geotechnical engineering survey and 3D geological modeling is the development way to realize the future fine(3D)survey.Based on the EVS 3D geological modeling software and conventional geotechnical engineering survey data of a construction project,3D survey of karst and soil caves in the site was studied.Based on the visualization three-dimensional geological model,division and volume of karst and soil caves in the site are analyzed,which provides a reliable basis for the treatment.The practice has proved that the use of cement is 14%less than the actual value,the use of chemical slurry is 24%less than the theoretical value,the construction period is 20 days less than the actual construction period,and the cost is 24%less than the actual cost,when the visualized three-dimensional geological model is been used to deal with the dissolved soil cave.