三维激光扫描技术在公路溶洞测量中的应用

某高速公路研究区发现溶洞与拟建高速公路某处桥墩相交，给公路工程建设带来较大安全隐患，为查清溶洞的形态、规模，采用三维激光扫描得到密集点云数据，再运用建模软件将点云数据逆向建立溶洞的三维模型。将溶洞三维模型与桥墩设计模型叠加，准确地分析了溶洞对高速公路的影响；将溶洞三维模型横、纵断面与桥墩横、纵断面进行叠加，准确量测出溶洞到桥墩桩基的距离，为桥墩桩基施工安全提供科学决策依据。

Application of 3D Laser Scanning Technology in Highway Karst Cave Survey

A karst cave was found in a highway research area to intersect with a bridge pier of the proposed highway, which brings greater safety hazards to highway construction. In order to find out the form and scale of the cave, use 3D laser scanning to obtain dense point cloud data, and then use modeling software to reverse the point cloud data to build a 3D model of the cave. Superimposing the 3D model of the karst cave with the pier design model accurately analyzes the influence of the karst cave on the expressway. By superimposing the transverse and longitudinal sections of the 3D model of the karst cave with the transverse and longitudinal sections of the pier, the distance between the karst cave and the pile foundation of the bridge pier is accurately measured, providing the basis for scientific decision-making for the safety of the construction of the bridge pier pile foundation.