三维激光扫描技术对岩溶区公路滑坡要素提取

TLS technology in the feature extraction of landslide monitoring in Karst mountainous area

针对岩溶山区因其脆弱的工程地质条件使得区域内的公路沿线容易发生沉降、变形和滑坡等问题,该文采用地面三维激光扫描(TLS)技术对云南九乡一个具有典型岩溶区地质环境的公路边坡进行扫描,对地面激光点云的外业数据采集和内业处理中的多站数据配准、点云滤波去噪、地面点云空洞修复以及基于点云数据的精细化建模等技术环节进行探讨;以位于该公路边坡上的一个滑坡为实验对象,着重对滑坡范围线、剖面线、滑坡坡度角和不稳定土方量等滑坡监测要素的提取方法进行研究。这是将地面TLS技术应用于岩溶区公路滑坡监测单期数据处理路线的一次探索,为后期基于激光点云的滑坡监测中多期数据的整合、管理和分析等集成式处理提供了技术上的支持。

Aiming at the problem that the ground along the highways in Karst areas are prone to subside,deform and slide due to the weak engineering geological conditions,in this paper,the terrestrial laser scanning(TLS)technique was used to scan a highway slope which was of typical Karst geological features in Yunnan Jiuxiang.The technology of various station data registration,filtering de-noising,cavity repair and fine modeling based on point cloud data in the external acquisition of laser point cloud data and internal industry processing were also discussed.A subsidiary landslide on the highway slope was taken as the experimental object,the extraction method of landslide monitoring factors,such as the red line,the profile line,the slope angle of the landslide and the unstable earthwork,was emphasized.This reasearch was an exploration of the application of ground TLS technology to the single phase data processing route of highway landslide monitoring in Karst area.It could therefore provide technical support for integration,management and analysis of various period data in landslides monitoring based on laser point cloud.