Triangular coordinate transmission measurement method applied to tunnel

Abstract

The invention discloses a triangular coordinate transmission measurement method applied to a tunnel. The method comprises the steps that: a control network is designed based on a tunnel structure, control reference points are selected at two ends of the control network, a measurement station point and a coordinate transmission point are set in the middle of the control network, advancing is conducted from the control reference points to the coordinate transmission point, a plurality of triangular coordinate transmission networks are formed at the control reference points, the measurement station point and the coordinate transmission point, overall adjustment calculation is carried out according to the observed quantity of the measurement station point, and calculation values of the measurement station point and the coordinate transmission point are obtained. The coordinate calculation precision is improved, a plurality of side length parameters and a plurality of angle parameters are formed at each measurement station point, multiple times of measurement can be carried out, and the precision is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel surveying, in particular to a triangular coordinate transfer surveying method applied in a tunnel. Background technique [0002] At present, engineering construction is changing with each passing day, and the number of tunnels has also doubled. In some tunnel construction specifications, tunnels with a penetration length greater than 4 kilometers must be designed for penetration, that is, the tunnel outside the tunnel is calculated based on the allowable error of penetration and the side length arrangement of the conductors in the tunnel. What kind of precision is required for the internal control network. After determining the accuracy of the control network inside and outside the cave, it is first necessary to measure and set up the control network outside the cave to provide a reference for the control network inside the cave. Sacrifice the whole to satisfy the part. The survey and design of t...

AI Technical Summary

Problems solved by technology

The control network in the cave adopts the resection mode, observes at the selected point to be measured towards three known points, obtains two observation angles, calculates the angle corresponding to the two points adjacent to the observation point, and thus solves the observation Point coordinates. In this mode, when one point is used to calculate the coordinates of the observation point, the result of another two points can be used for verification. However, this calculation method uses a quadrilateral method, and the calculation accuracy needs to be improved.

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