Construction measurement method of deep shaft reverse coordinate transfer projecting point

Abstract

The invention discloses a measurement method for deep shaft well reverse coordinate transmission point setting construction, and belongs to the technical field of deep shaft coordinate transmission point setting construction, the measurement method facilitates embedding of points at the bottom of a well, has the advantages of short well hole occupation time, high precision, simple operation, high measurement speed, strong practicability, pile anchoring easiness, deep shaft well plane transmission easiness and easy elevation transmission, and is less prone to being affected by air flows and dropping water in the shaft well. The method includes the following steps: (1) instrument selection and instrument calibration before point setting; (2) setting of reverse transmission point setting of a laser plummet apparatus; and (3) shaft well elevation reverse transmission treatment of a total station.

Description

technical field [0001] The invention relates to the technical field of point-pointing construction through coordinate transmission of deep shafts, in particular to a construction measurement method for point-pointing through 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 ad...

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 vertical shaft throwing point which is relatively shallow and requires low penetration accuracy, and it is inconvenient to lay the vertical shaft downward from the wellhead at the bottom of the shaft. Therefore, it is necessary to design a It is very necessary to use the reverse coordinate transfer projecting point construction measurement method for deep shafts that are easy to use and are not easily affected by airflow and dripping water in the shaft.

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