基于三维激光扫描技术的竖井联系测量及应用研究

Application Research on Shaft Connection Measurement Based on 3D Laser Scanning Technology

传统的竖井联系测量方法主要是通过挂钢丝或是采用陀螺仪等设备将井上平面坐标传递到井下,而高程联系测量则需要挂钢尺进行传递,这些方法作业时间长,现场准备工作烦琐,且平面和高程只能分开作业。研究采用三维激光扫描技术进行竖井联系测量,在井上安置若干个标靶并用全站仪测定其三维坐标,在井下用三维激光扫描仪通过扫描井上的标靶将地面的平面坐标和高程传递到地下。以一个电力管井为例介绍了该方法的作业流程,分析了其精度影响因素及适用场景,为类似工程的联系测量提供了借鉴经验。

The traditional shaft connection measurement method is mainly to transfer the plane coordinates of the well to the downhole by hanging steel wire or using the equipment such as the drop point meter and gyroscope,while the elevation connection measurement needs to be carried out by hanging steel ruler.These methods have long working time,tedious field preparation work,and the plane and elevation can only be operated separately.Three-dimensional laser scanning technique was used to measure the connection of shaft,and several targets were placed on the well and measured by total station.Taking a power pipe well as an example,the operation flow of this method is introduced,and the influencing factors and applicable scenarios of its accuracy are analyzed.