Subway interval joint survey method based on reverse contact survey

Abstract

The invention relates to a subway interval joint measurement method based on reverse connection survey, which is used for joint measurement of control points between a cut-through interval and a non-cut-through interval in a joint measurement unit, and specifically comprises the following steps of: normally performing joint measurement on underground control points of a subway cut-through interval according to a mode from a station control edge to an interval lead point to the station control edge; two steel wires are hung on the non-through section part, the coordinate and the direction of an underground starting point of the through section are transmitted to a laid ground starting point in a reverse relation measurement mode to serve as ground starting data, and the ground part adjusts ground control points of the non-through section in an attached wire mode; and after the middle tunnel is communicated, the middle tunnel joint measurement data is incorporated into the whole network for data correction, and the overall joint measurement precision is ensured. The combined measurement method is reasonable in measurement method, high in measurement accuracy, high in operability and short in measurement period, and can better overcome the influence of the non-cut-through interval on the combined measurement work.

Description

technical field [0001] The invention relates to the field of underground engineering control measurement, in particular to a method for joint measurement of subway intervals based on reverse connection measurement, which can realize joint measurement of control points in a through-section and a non-through-intersection in a joint measurement unit. Background technique [0002] In the process of subway construction, the construction is usually carried out independently by sub-tenders. Due to human and system reasons, there are measurement convergence errors between the bids. After the bidding section is completed, in order to ensure the accuracy of the as-built survey and track engineering survey, it is necessary to carry out joint survey of interval underground control points and precise adjustment of data. [0003] After the tunnel is penetrated, the underground conductor is composed of the branch conductor and the baseline edge at the other end to form a joint conductor. W...

AI Technical Summary

Problems solved by technology

[0006] Based on the joint measurement unit of "five stations and four intervals" or "four stations and three intervals" in track engineering construction, the joint measurement of control points cannot be carried out because the intervals are not penetrated. In this way, the coordinates and azimuths of the underground starting point in the through-interval are transferred to the ground starting point respectively, and they are used as the reverse connection measurement method of the subway interval joint measurement method for the ground starting data in the non-through-interval

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