高速公路隧道的三维地质建模技术研究

A Study of 3D Geological Modeling for Expressway Tunnels

文章介绍了高速公路隧道工程三维地质建模技术研究的有关技术问题,介绍了空间数据模型、建模要素和建模流程,分析并比较了各类方法和流程的优、缺点;基于离散光滑插值等技术,提出利用地质钻孔点、地质剖面线上的特征点和由特征点插值出剖面线上的点三者共同参与插值的方法,提出基于任意形状空间多边形生成地下隧道的方法,并解决任意地下隧道与地质体相互裁减的问题;最后以岭脚隧道工程为实例,建立包括地层信息、三维隧道、断层信息等地下结构的全景三维地质模型,将研究的三维地质建模技术进行实际工程应用,验证了方法的理论意义和应用价值。

This paper introduces 3D geological modeling techniques for expressway tunnels, including a special data model, key factors for modeling, and modeling procedures. It also compares the advantages and disadvantages of vari- ous methods and procedures. Based on a discrete smooth interpolation algorithm, the interpolation method using geo- logical drill hole points, key points on geological section lines and interpolated key points are presented, as well as the method used to generate the tunnel based on a polygon of arbitrary shape and space. These techniques solved the cut ting down problem of interface between any tunnel and geological body. The panorama 3D geological model was set up for the Lingjiao Tunnel using information regarding the stratum, 3D tunnel, and fault