Method for measuring steel wire interval in subway shaft connection survey using electronic total station

Abstract

The invention discloses a method for measuring steel wire intervals in subway shaft connection survey by using an electronic total station. The method comprises the steps of suspending two steel wires of which the diameters are less than 0.5mm at a subway shaft, and suspending heavy hammers on the tail ends of the steel wires and dipping into damping liquid; and the method further comprises the steps of: A. respectively erecting electronic total stations at near-shaft points above and under the subway shaft, pasting reflecting sheets on the steel wires above the shaft and under the shaft, and positioning the reflecting sheets on a straight line in the horizontal measuring direction of the electronic total station; B. adjusting the deviation distance of the electronic total station relative to the straight line where the reflecting sheets of the two steel wires are positioned; C. adjusting the electronic total station, and respectively reading the horizontal distance between the two steel wires above the shaft and under the shaft through the electronic total station after the steel wires are in the static state; and D. confirming the observation data and obtaining the interval between the two steel wires. By utilizing the method, the suspension standard of the steel wires in the working process is effectively lowered, and the time and the labor are saved, however, the precision degree is about 5 times higher than the normative standard, and the precision in connection survey is ensured.

Description

technical field [0001] The invention relates to the measurement of steel wire spacing in the directional measurement of the connection triangle method (or double connection triangle method) in the connection measurement of subway shafts. In particular, the invention relates to a method for measuring steel wire spacing in connection measurement of subway shafts by using a total station. Background technique [0002] The construction of the subway section is mostly carried out using the construction shaft, and the process of transferring the ground plane coordinate system to the underground construction tunnel through the shaft is called plane connection measurement. The most traditional method of plane connection measurement connection is connection triangle directional measurement. The main technical method is to hang two steel wires in a shaft, form a triangle with the steel wire at the near-well point A on the ground, and measure the distance and angle between the near-wel...

AI Technical Summary

Problems solved by technology

Since the complete level of the steel ruler 101 cannot be guaranteed, the nominal tension cannot be guaranteed, the synchronization of the reading scale of the steel wire cannot be guaranteed, and the projection of the steel wire completely perpendicular to the steel ruler cannot be guaranteed, resulting in low precision of the measured steel wire spacing (up to millimeter level) , Sometimes even improper operation touches the steel wire to cause measurement failure, and it is inevitable to repeat it, resulting in increased measurement labor and achieving results with twice the result with half the effort

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