过江外排顶管工程工作竖井定位及其精度的研究

Positioning and Accuracy Analysis of the Working Shaft for a Project

本文从理论和实践上对大型过江顶管工程的竖井定位进行了研讨，认为采用竖井联系三角形法辅以精密陀螺仪检测是竖井方向传递的有效且精度较高的方法。上海市过黄浦江大型顶管准确贯通就是证明。

Based on the theory and practice of a project in Shanghai, this paper discusses the positioning method of the vertical shaft. It is concluded that the connected triangle aided with precise gyroscopic theodolite measurment is an efficient way of directional transfering.