基于EVS的隧道工程三维地质建模应用

Application of 3D Geological Modeling of Tunnel Engineering Based on EVS

介绍了EVS软件三维地质建模流程,以横琴杧洲隧道工程场地为研究对象,基于勘察钻孔数据,使用EVS软件建立了地层模型和属性模型,剖切三维模型得到沿线纵剖面及横剖面,定量对比分析了两类模型的建模效果,结果显示除粗砂层和中风化砂岩层以外的其他地层体积误差均小于8%,地层模型中各地层区域内相应地层的预测概率达到60.91%~91.34%,属性模型中概率大于0.8的单元体积占总体积为65%,概率大于0.6的单元体积占总体积为85%,结果表明地层模型与属性模型具有较好的空间位置对应关系,模型具有较高的置信度。

In this paper,3D geological modeling process of the EVS software is introduced.Taking Mangzhou Tunnel Engineering site in Hengqin as the research object,based on the survey borehole data,the EVS was used to build the stratigraphic model and the attribute model,and the vertical and transverse sections along the tunnel line were obtained by cutting the 3D model.The modeling effects of the two models were compared and analyzed quantitatively.The results show that the volume errors of other strata except coarse sand layer and moderately weathered sandstone layer are less than 8%.In the stratum model,the prediction probability of corresponding strata in each stra‐tum area is 60.91%~91.34%.In the attribute model,the unit volume with probability greater than 0.8 accounts for 65%of the total vol‐ume,and the unit volume with probability greater than 0.6 accounts for 85%of the total volume.The results show that the stratigraphic model and the attribute model have a good spatial position correspondence relationship,and the model has a high confidence.