Calculation method for subway surveying and mapping non-orientated traverse

Abstract

The invention provides a calculation method for a subway surveying and mapping non-orientated traverse, wherein the calculation method includes the steps: determining a first coordinate of a first control point and a second coordinate of a second control point when a vertical shaft steel wire is thrown underground; arranging n traverse points between the first control point and the second controlpoint; obtaining reckoned azimuth angles of all traverse sides according to a left angle; calculating to obtain coordinate increment according to the reckoned azimuth angles and measured distance of all the traverse sides; calculating to obtain a reckoned coordinate of the second control point according to the coordinate of the first control point and the calculated coordinate increment, and thusobtaining a reckoned azimuth angle of a traverse starting and end side; calculating to obtain an actual azimuth angle of the traverse starting and end side according to the actual coordinates of the first control point and the second control point; obtaining actual azimuth angles of all the traverse sides according to the difference between the actual azimuth angles and the reckoned azimuth angleof the traverse starting and end side and the reckoned azimuth angles of all the traverse sides; and reckoning a coordinate of the second control point according to the azimuth angles and measured distances of all the traverse sides. The calculation method greatly lengthens the distance between the two steel wires, and reduces the influence of the error of steel wire throwing points on the lateralposition of an underground traverse.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a calculation method for a subway surveying and mapping non-directional conductor. Background technique [0002] With the rapid development of China's economy, urban rail transit projects have been quickly integrated into the development plans of various cities. The urban rail transit engineering projects represented by subway construction are in full swing in major cities. Surveying and mapping work plays a guiding role in the construction of the subway. Every time the vertical shaft is connected and measured, the control of the wire is related to whether the tunnel can be penetrated accurately. Contents of the invention [0003] The purpose of the present invention is to provide a method for calculating the non-directional wire of subway surveying and mapping, so as to solve the problem in the prior art that the error of the steel wire casting point affects the...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for calculating the non-directional wire of subway surveying and mapping, to solve the problem in the prior art that the error of the steel wire throwing point affects the lateral position of the underground wire

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