Shield TBM driving attitude deviation calibration method

Abstract

The invention discloses a shield TBM driving attitude deviation calibration method. The shield TBM driving attitude deviation calibration method comprises measuring point selection, cutterhead coordinate calculation, and shield tail coordinate calculation. According to the shield TBM driving attitude deviation calibration method, a principle that a plane is formed by three non-collinear points inspace is adopted, a measuring control point is selected on a shield machine middle body, the three dimensional coordinates of the selected measuring control point are measured, and the relationship ofthe measuring control point with a shield TBM design axis is determined; based on space analytic geometry principles, the calculation method of the coordinates of the center of the shield machine cutterhead and the center of the shield tail is obtained via deriving, and the shield machine attitude deviation situations are obtained. The shield TBM driving attitude deviation calibration method canbe used for rapid artificial measuring calibration on shield TBM driving attitude on construction field, so that the accuracy of shield TBM driving attitude is ensured, and the preferable tunnel moulding quality of shield TBM construction is ensured.

Description

technical field [0001] The invention relates to the technical field of shield machine excavation, in particular to a method for checking posture deviation of shield TBM excavation. Background technique [0002] The attitude control of shield TBM excavation is directly related to the tunnel forming quality, which is of great significance. During the shield TBM construction process, the automatic guidance system will be used to measure the tunneling posture of the shield TBM in real time and control the excavation direction of the shield machine. However, when the automatic guidance system fails or the data is entered incorrectly, the tunneling posture of the shield TBM will deviate seriously from the design, resulting in engineering accidents. [0003] On March 7, 2013, during the construction of shield tunneling in the interval from Huayang Station to the right line of Guangdu North Station (hereinafter referred to as: the right line of Huaguang Section) of the South Extens...

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Problems solved by technology

However, when the automatic guidance system fails or the data is entered incorrectly, the tunneling posture of the shield TBM will seriously deviate from the design, resulting in engineering accidents

[0003] On March 7, 2013, during the construction of shield tunneling in the interval from Huayang Station to the right line of Guangdu North Station (hereinafter referred to as: the right line of Huaguang Section) of the South Extension Line of Chengdu Metro Line 1, the shield machine started from Guangdu North Station On March 13, the measurement team of the project department measured the segment attitude of rings 1 to 12, and the measurement results showed that the maximum deviation of the tunnel elevation was 19mm; on March 19, the project department re-measured the segment attitude of rings 1 to 56 and found that The 17-56 rings (GDYK25+533.3~+593.3) all have different degrees of overruns, of which the vertical deviation of the 56th ring reaches +2010mm, and the horizontal deviation is +52mm, but the vertical deviation of the shield displayed at the 56th ring of the shield machine measurement guide system The shield head is -29mm, the shield tail is -25mm, the horizontal deviation is +41mm, and the shield tail is +35mm. The actual measurement deviation of the forming tunnel is seriously inconsistent with the deviation displayed by the shield machine measurement and guidance system.

After investigation, it was confirmed that the shield tunneling machine VMT system entered the wrong shield tunneling plan line data file, which caused the shield machine to advance according to the wrong planned line, resulting in the deviation of the shield tunnel axis, resulting in a direct economic loss of more than 2.73 million yuan. Constituting general accidents of municipal infrastructure engineering quality

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