A method of measuring point by reverse coordinate transfer in deep shaft

Abstract

The invention discloses a reverse coordinate transfer plumbing measurement method of a deep shaft, and belongs to the technical field of coordinate transfer plumbing construction of deep shafts. The measurement method facilitates burying of point positions at the bottom of the shaft, is short in shaft occupation time, high in accuracy, simple to operate, high in measurement speed and high in practicability, facilitates pile anchoring, facilitates plane transfer and elevation transfer measurement of the deep shaft, and is difficultly influenced by an air flow and dripping water in the shaft. The measurement method comprises the following steps of (1) performing instrument selection and instrument calibration prior to plumbing, (2) arranging a laser plumb instrument for reverse transfer plumbing, and (3) performing reverse transfer processing on the elevation of the shaft by a total station.

Description

technical field [0001] The invention relates to the technical field of projecting point construction through coordinate transmission of deep shafts, and in particular to a point measurement method for reverse coordinate transmission of deep shafts. Background technique [0002] In tunnel construction, in order to speed up the construction progress and ventilation, long tunnels, especially urban subway tunnels, often use the method of adding vertical shafts to increase the construction face to speed up the construction progress. The coordinates, direction and elevation in the ground control network are transmitted to the downhole through the shaft, so that the coordinate system of the underground control network and the control network on the ground are unified. Therefore, the measurement of shaft transfer connection has become the primary problem in construction. [0003] At present, the method of vertical shaft plane connection measurement mainly adopts the vertical shaft ...

AI Technical Summary

Problems solved by technology

The specific method is to hang two steel wires in the wellbore. The upper end of the steel wire is pulled by a small winch on the ground, and the lower end of the steel wire is hung with a weight. This method is affected by the airflow and dripping water in the shaft, so that the vertical ball The deviation and non-stop swing of the line can only be applied to the shaft throwing point which is relatively shallow and requires low penetration precision, and it is inconvenient to lay the shaft downward from the wellhead at the bottom of the well. Therefore, it is necessary to design a It is very necessary to use reverse coordinate transfer projection point measurement method for deep shafts that are easy to use and not easily affected by airflow and dripping water in the shaft

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