地下箱涵检测评估中的测绘技术应用研究

Application of surveying and mapping methods in detection and evaluation of underground box culvert

以“杨树浦港~虬江水系综合整治工程”为项目背景,本文探讨了综合应用GNSS控制测量技术、全站仪导线测量技术、全站仪三角高程测量技术、三维激光扫描技术以及无人机航空摄影测量技术解决地下箱涵检测及结构评估问题,对这几种测绘技术的作业方法及精度进行了分析。通过无人机航拍测绘,结合箱涵结构整体三维激光扫描成果,对箱涵对应地表的高程和覆土厚度进行了计算,同时对箱涵边界的建筑物侵入情况进行了分析,对箱涵的结构安全进行了综合评估,为以后此类项目的应用提供了一些参考。

Taking‘Yangshupu Port-Qiujiang River System Comprehensive Regulation Project’as an example,this paper discusses the application of GNSS control surveying,total station traverse surveying,total station trigonometric elevation surveying,three-dimensional laser scanning and UAV aerial photogrammetry to solve the problems of underground box culvert detection and structure safety evaluation,and analyzes the operation methods and accuracy of these surveying and mapping methods.Based on UAV aerial photography and 3D laser scanning results of box culvert structure,the elevation of box culvert corresponding to the surface and the thickness of overlying soil are calculated.At the same time,the intrusion of buildings at the boundary of box culvert is analyzed,and the structural safety of box culvert is comprehensively evaluated,which provides some references for the future application of such projects.