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High-precision measurement method for initial state of shield

A technology of initial state and measurement method, applied in the direction of measuring devices, instruments, etc., can solve the problems of large impact on processing or assembly accuracy, large field workload, and small application range, so as to achieve small field workload, small impact, Wide range of effects

Active Publication Date: 2020-08-11
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a high-precision measurement method for the initial state of the shield, in order to solve the problems in the prior art that are difficult to operate, low safety factor, large field workload, low measurement accuracy, small scope of application, shielded The processing or assembly accuracy of the structure itself is greatly affected

Method used

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  • High-precision measurement method for initial state of shield
  • High-precision measurement method for initial state of shield
  • High-precision measurement method for initial state of shield

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Embodiment

[0059] Example: A high-precision measurement method for the initial state of the shield

[0060] The specific steps of the method are as follows:

[0061] 1. Preparatory stage:

[0062] (1) Before the shield is assembled, choose a place that is easy to observe in the shield tunnel and the middle layer (higher than the top of the shield), and can observe more than three control points at the same time when setting up the station. Or other precision prism inserts matched with the measuring robot, such as Tianbao precision small prism inserts) as the control points of the measurement, bury 8 to 10;

[0063] (2) After the initial connection measurement of the shield machine is completed, use the Leica TS30 high-precision measuring robot and the supporting Leica precision circular prism, and use the free station method to measure the three-dimensional coordinates of each control point. Stations can be set up multiple times during the measurement process, but more than three contr...

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Abstract

The invention discloses a high-precision measurement method for the initial state of a shield, and aims to solve the technical problems that a measurement method in the prior art is not easy to operate, low in safety coefficient, large in field workload, low in measurement precision, small in application range and greatly influenced by the machining or assembling precision of the shield. The method is characterized by establishing a shield measurement control network by using a free station setting method; acquiring three-dimensional coordinates of all points uniformly distributed on the front, middle and rear cross sections of the shield by using a high-precision measurement robot and a matched prism-free device; and calculating three circle centers by using the collected section points,wherein two of the circle centers are used for calculating the shield attitude, and the third circle center is used for checking, so that the data reliability is ensured. The measurement method can quickly measure the initial attitude before shield launching and calculate the zero parameter of a guide system, and has the advantages of easiness in operation, high safety coefficient, small field workload, high measurement precision, reliable result, wide application range and small influence by the machining or assembling precision of the shield itself.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction measurement, in particular to a high-precision measurement method for the initial state of a shield tunnel. Background technique [0002] At present, the construction method of urban subway and municipal engineering tunnel is mainly the shield method. In the shield tunneling method, it is necessary to measure the initial attitude of the shield tunneling machine after the assembly is completed, so as to obtain the zero position parameters required for the debugging of the guidance system. [0003] In the prior art, the methods for measuring the initial posture of the shield mainly include: [0004] (1) Horizontal ruler method. The principle of this method is: measure the three-dimensional coordinates of the patch on the aluminum alloy ruler placed horizontally on the inner shell of the shield tail, and calculate the three-dimensional coordinates of the shield head and tail throu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 王建林胡新朋秦小鹏齐保伟陈文明刘创马腾徐永强马成龙朱照光冯凯林青桥陈振尧张仕勇袁前林吴红兵
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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