Method for measuring rail transportation shaft relation

Abstract

The invention provides a method for measuring a rail transportation shaft relation. A total station is erected at a wellhead known point on one side of a shaft for the first time; the total station is erected at a wellhead erecting point for the second time; an in-shaft erecting point is arranged on the other side, opposite to a first row of relating points, in the shaft, and the total station is erected at the in-shaft erecting point for the third time; a shaft bottom erecting point is arranged opposite to a second row of relating points at the bottom of the shaft, and the total station is erected at the shaft bottom erecting point for the fourth time; the second row of relating points are used as back viewing points, observation points arranged on the two sides of the shaft bottom erecting point are used as front viewing points, and multi-observation-set observation is carried out; and a coordinate system is transmitted to a shaft bottom position. The method, provided by the invention, is used for measuring a subway tunnel shaft relation and is simple to operate; manpower and material resources used by the method are greatly reduced compared with those used by other methods; and meanwhile, the precision is high, errors are small and a construction period is short.

Description

technical field [0001] The invention relates to the technical field of track surveying and mapping, in particular to a shaft connection measurement method for subway tunnels. Background technique [0002] With the needs of urban development, many cities in China have successively carried out the construction of rail transit projects to ensure smooth urban traffic and the convenience of people's travel. In order to effectively utilize urban space, urban rail transit projects are mainly carried out in the form of underground tunnels. In order to meet the design requirements of shield tunneling, it is necessary to study the errors caused by each step of the measurement work, including several stages such as ground control measurement, shaft connection measurement, that is, the transfer of the ground coordinate system and elevation system to the underground, and underground wire measurement. Under the existing measurement technology, the ground control measurement can be done v...

AI Technical Summary

Problems solved by technology

The disadvantage of the gyro orientation method is that the price of the gyro theodolite is expensive, and there are few units with the gyro theodolite, which is difficult to popularize and apply. At the same time, its single positioning accuracy is low, and the general instrument is 20″; the disadvantage of the drilling method is the preparation work. There are many methods, such as determining the position of the projecting point, looking for the drilling team, drilling on the spot, etc., which is not conducive to the popularization and application of the method of projecting the hole. Compared with other methods, it is relatively backward compared with other methods due to long working hours and high labor intensity; the disadvantages of the wire orientation method are that the length of the wire side is short and the pitch angle is too large, there are few check conditions for a single wire, and the error is large

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