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Initial positioning and rapid centering measurement method for shield tunneling machine

A measurement method and initial positioning technology, applied in the direction of measurement devices, instruments, etc., can solve the problems of obstructed measurement line of sight, low measurement accuracy, slow measurement speed, etc., and achieve the effects of shortened construction period, high measurement accuracy, and easy operation.

Active Publication Date: 2020-08-25
SHANGHAI FOUND ENG GRP
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Problems solved by technology

[0003] In order to overcome the problem that the backseat equipment blocks the measurement line of sight during the initial positioning of the shield machine, the present invention provides a rapid centering measurement method for the initial positioning of the shield machine, which can effectively solve the problem that the measurement line of sight is blocked during the initial positioning of the shield machine. Problems of slow measurement speed and low measurement accuracy

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  • Initial positioning and rapid centering measurement method for shield tunneling machine
  • Initial positioning and rapid centering measurement method for shield tunneling machine

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] The shield machine initial positioning rapid centering measurement method of the present invention comprises the following steps:

[0018] (1) First establish an independent coordinate system with point X-Y, such as figure 1 shown. Set up the instrument at point X, and measure the three-dimensional coordinates of two points A{Xa, Ya, Za} and B{Xb, Yb, Zb} on the arc of the incision, so that Za=Zb, that is, the chord length AB is a horizontal chord, and the same Measure the points C{Xc, Yc, Zc}, D{Xd, Yd, Zd} on the arc of the shield tail theoretically, so that Zc=Zd, use the theorem of vertical diameter: the vertical bisector of the chord must pass through the center of the circle, that is, O1E⊥ AB,O2F⊥CD;

[0019] (2) Calculate the plane coordinates of O1 and O2 points, O1{X O1 ,Y O1}, where X O1 =(Xa+Xb) / 2,Y O1 =(Ya+Yb) / 2, same O2{X O2 ...

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Abstract

The invention relates to an initial positioning and rapid centering measurement method for a shield tunneling machine and is used for correcting the posture of the shield tunneling machine before theshield tunneling machine starts. The method is characterized in that an independent coordinate system is established, four points are taken from a cutter head and a shield tail of the shield tunnelingmachine, and the plane center line of the shield tunneling machine is obtained through calculation according to the vertical diameter theorem theory, and coordinates of the central points of measurement planes of a front ruler and a rear ruler in the shield tunneling machine are calculated by using a coordinate conversion formula by taking the coordinates as reference lines of the new independentcoordinate systems, the new independent coordinate systems are continuously established to enable the position coordinates of the central points of the planes measured by the front ruler and the rearruler in the shield tunneling machine to be zero, and finally plane accurate centering of the measurement marks in the shield tunneling machine is completed. Compared with a traditional method, the method is easy and convenient to operate, higher in measurement precision and higher in speed, a construction period of a project is greatly shortened, less manpower is needed, the risk of urban underground space operation is greatly reduced, and technical feasibility, working efficiency and the implementation effect are greatly higher than those of the traditional mode.

Description

technical field [0001] The invention relates to a method for locating the initial position of a shield machine, in particular to a method for quickly centering and measuring the initial position of a shield machine. Background technique [0002] Accurate measurement of the posture of the shield machine during shield construction is to ensure that the shield machine can always move forward along the design axis, which plays a guiding role. In the shield tunneling measurement, the deviation between the incision and the shield tail needs to be measured in order to correct the deviation of the shield tunneling machine. After the actual shield advances, because the shield machine enters the soil, the incision and shield tail cannot be directly measured, but through the measurement marks installed inside the shield machine shell, after the actual measurement of the measurement marks, use Theoretical methods indirectly deduce the deviation of the notch from the tail of the shield....

Claims

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Application Information

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IPC IPC(8): G01B21/00G01B21/04G01B21/24
CPCG01B21/00G01B21/04G01B21/24
Inventor 徐金荣丁东强蔡素素钱美刚赵志军徐伟
Owner SHANGHAI FOUND ENG GRP
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