Large-diameter shield segment attitude measurement method and system and storage medium

Abstract

The invention discloses a large-diameter shield segment attitude measurement method and system and a storage medium, and belongs to the technical field of shield tunnels. The method comprises the following steps: S1, a measuring point acquisition stage; s2, a reference surface calculation stage: calculating the average mileage of the n measuring points, and taking the section where the average mileage is located as a reference surface; calculating a design circle center coordinate according to the average mileage and the height difference from the circle center to the rail surface before executing the segment attitude measurement stage; s3, a measuring point projection stage: projecting the n measuring points to a reference surface according to the horizontal curve and the vertical curve to obtain a plurality of projection points corresponding to the measuring points, and calculating offset distances and elevations of the projection points; s4, a circle center coordinate calculation stage: calculating a weighted calculation circle center coordinate according to the offset distance of the projection point, the elevation and the segment design radius R; and S5, a segment attitude measurement stage: calculating an elevation difference value and an offset distance difference value between the weighted calculation circle center coordinate and the design circle center coordinate to obtain a segment attitude. According to the invention, the attitude of the duct piece can be measured directly through the measuring points.

Description

Technical Field

[0001] The present invention relates to the technical field of shield tunnels, and in particular to a method, system and storage medium for measuring the posture of a large-diameter shield segment. Background Art

[0002] The diameter of the tunnel constructed by the shield method is about 8m. With the application of the shield method in high-speed railways, highways, water diversion and other projects, the diameter of the shield has increased to about 15m. The lining adopts prefabricated segment lining rings. In order to timely check the accuracy of the segment installation position and the changes after grouting, the segment posture is measured after the segment is installed and before it is removed from the shield tail. The mature method is the segment ruler method. The segment ruler measurement method, the length of the ruler determines the accuracy of the segment posture. When the segment diameter is small, it can still be used. When the segment diameter becomes larger, the length of the segment ruler must also increase accordingly to meet the measurement and calculation accuracy of the segment posture. After the segment ruler increases, it is easy to deform, and the difficulty of handling and operation increases. Because the segment has not been removed from the shield tail and the rear supporting facilities, the visibility conditions are poor, and the method of center fitting is ineffective. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a method, system and storage medium for measuring the posture of a large-diameter shield segment.

[0004] The object of the present invention is achieved through the following technical solutions: The first aspect of the present invention provides: a method for measuring the posture of a large-diameter shield segment, comprising the following steps: S1: During the measurement point collection phase, n measurement points on the same section are collected on site, where n is greater than or equal to 2; and the mileage, offset and track height of each measurement point are calculated; S2: Reference plane calculation stage, calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; and calculate the design circle center coordinates based on the average mileage and the height difference between the circle center and the rail surface before executing the segment attitude measurement stage; S3: In the measurement point projection stage, n measurement points are projected onto the reference plane according to the horizontal curve and the vertical curve to obtain multiple projection points corresponding to the measurement points and calculate the offset and elevation of the projection points; S4: Calculation of the center coordinates of the circle, in which the weighted center coordinates are calculated based on the offset, elevation and segment design radius R of the projection point; S5: In the segment attitude measurement stage, the elevation difference and offset difference between the weighted calculated circle center coordinates and the designed circle center coordinates are calculated to obtain the segment attitude.

[0005] Preferably, the step S4: calculating the center coordinates of the circle, further comprises the following steps: S41: Find the center of the designed circle Azimuth to the projection point ,in x0 is the elevation of the design center, y 0 is the offset of the design center. is the i-th projection point The elevation of is the i-th projection point The offset of S42: Sort the azimuth angles from small to large, and the sorted azimuth angles are: , sort the projection points according to the sorting results of the azimuth angles, and the sorted results are ,in To design the azimuth from the center of the circle to the first projection point, is the azimuth from the center of the circle to the i-th projection point, To design the azimuth from the center of the circle to the nth projection point, is the first projection point after the projection points are sorted according to the azimuth sorting result. is the i-th projection point after the projection points are sorted according to the azimuth sorting result, is the nth projection point after the projection points are sorted according to the azimuth sorting result; S43: sort the projection points Any two points in the combination, calculate any two points arrive Distance and direction: get arrive Distance ,direction ; S44: Data elimination, when If the chord length is less than the preset minimum chord length or greater than the preset maximum chord length, it will not be included in the calculation; S45: Calculation arrive The center point coordinates : ; S46: Calculation M j To calculate the center O j Azimuth and distance: Azimuth: ,distance: ; S47: Calculation M j arrive O j Coordinate increment: ,get M j arrive O jCoordinate increment in elevation direction and the coordinate increment in the offset direction ; S48: Calculation Coordinates: ; S49: Determine the weights. O j The corresponding chord length is , sum up the lengths of all chords involved in the calculation ,right ; S410: Calculate the weighted average of the center coordinates Get the weighted calculated circle center coordinates: .

[0006] Preferably, the design center O 0 elevation x 0= H + h ,in H is the track height of the reference plane calculated based on the average mileage and vertical curve, h The height difference between the rail surface and the center of the segment is a fixed value; the design center O 0 offset y 0=D, where D is the distance from the tunnel centerline to the designed horizontal curve, which is a constant, and the designed horizontal curve offset is 0.

[0007] The second aspect of the present invention provides: a large-diameter shield segment posture measurement system, used to implement any of the above-mentioned large-diameter shield segment posture measurement methods, comprising: The measuring point acquisition module is used to collect n measuring points on the same section on site, where n is greater than or equal to 2; and calculate the mileage, offset and track height of each measuring point; The reference plane calculation module is used to calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; and calculate the coordinates of the design circle center according to the average mileage and the height difference between the circle center and the rail surface before measuring the segment posture; The measuring point projection module is used to project n measuring points onto the reference plane according to the horizontal curve and the vertical curve, obtain multiple projection points corresponding to the measuring points and calculate the offset and elevation of the projection points; The circle center coordinate calculation module is used to calculate the weighted circle center coordinates according to the offset, elevation and segment design radius R of the projection point; The segment attitude measurement module is used to obtain the segment attitude by calculating the weighted elevation difference and offset difference between the calculated circle center coordinates and the designed circle center coordinates.

[0008] The third aspect of the present invention provides: a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by a processor, any of the above-mentioned large-diameter shield segment posture measurement methods is implemented.

[0009] The beneficial effects of the present invention are: 1) In large-diameter (14m or more) shield tunnels, if the segment ruler method is used to measure the segment posture, the segment ruler length must be 6m or more. This length of segment ruler is prone to deformation, affecting the measurement accuracy. And it cannot be used in the limited space of the shield machine. With this measurement method, the segment posture can be measured directly through the measurement point without using the segment ruler. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a flow chart of the large diameter shield segment posture measurement method; Figure 2 Schematic diagram for calculating the center of a circle; Figure 3 This is a schematic diagram for calculating the design center of the circle. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0012] See also Figure 1-Figure 3 The first aspect of the present invention provides: a method for measuring the posture of a large-diameter shield segment, comprising the following steps: S1: During the measurement point collection phase, n measurement points on the same section are collected on site, where n is greater than or equal to 2; and the mileage, offset and track height of each measurement point are calculated; S2: Reference plane calculation stage, calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; and calculate the design circle center coordinates based on the average mileage and the height difference between the circle center and the rail surface before executing the segment attitude measurement stage; S3: In the measurement point projection stage, n measurement points are projected onto the reference plane according to the horizontal curve and the vertical curve to obtain multiple projection points corresponding to the measurement points and calculate the offset and elevation of the projection points; S4: Calculation of the center coordinates of the circle, in which the weighted center coordinates are calculated based on the offset, elevation and segment design radius R of the projection point; S5: In the segment attitude measurement stage, the elevation difference and offset difference between the weighted calculated circle center coordinates and the designed circle center coordinates are calculated to obtain the segment attitude.

[0013] In this embodiment, the segment posture can be measured by two or more measuring points and the designed radius. In S1, the measuring points are on the inner wall of the segment, the point spacing is as large as possible, and the mileage, offset and track surface height of the measuring points are calculated at roughly the same mileage and the same ring segment. Figure 2 As shown, a rectangular coordinate system is established, with the x direction being the tunnel elevation direction and the y direction being the tunnel offset direction. Define polar coordinates and coordinate increment calculation method: The coordinates of point A are (a, b), the coordinates of point B are (c, d), and the distance and azimuth from A to B are S A→B and L A→B Polar coordinate calculation method: Pol (ca, db), the calculation result is S A→B and L A→B ; Coordinate increment calculation method: Rec ( S A→B , L A→B ), the calculation result is the coordinate increment from point A (a, b) to point B (c, d), that is, △ x A→B =ca and △ y A→B =db.

[0014] In some embodiments, the S4: calculating the center coordinates calculation stage further includes the following steps: S41: Find the center of the designed circle Azimuth to the projection point ,in x 0 is the elevation of the design center. y 0 is the offset of the design center. is the i-th projection point The elevation of is the i-th projection point The offset of S42: Sort the azimuth angles from small to large, and the sorted azimuth angles are: , sort the projection points according to the sorting results of the azimuth angles, and the sorted results are ,in To design the azimuth from the center of the circle to the first projection point, is the azimuth from the center of the circle to the i-th projection point, To design the azimuth from the center of the circle to the nth projection point, is the first projection point after the projection points are sorted according to the azimuth sorting result. is the i-th projection point after the projection points are sorted according to the azimuth sorting result, is the nth projection point after the projection points are sorted according to the azimuth sorting result; S43: sort the projection points Any two points in the combination, calculate any two points arrive Distance and direction: get arrive Distance ,direction ; S44: Data elimination, when If the chord length is less than the preset minimum chord length or greater than the preset maximum chord length, it will not be included in the calculation; S45: Calculation arrive The center point coordinates : ; S46: Calculation M j To calculate the center O j Azimuth and distance: Azimuth: ,distance: ; S47: Calculation M j arrive O j Coordinate increment: ,get M j arrive O j Coordinate increment in elevation direction and the coordinate increment in the offset direction ; S48: Calculation Coordinates: ; S49: Determine the weights. O j The corresponding chord length is , sum up the lengths of all chords involved in the calculation ,right ; S410: Calculate the weighted average of the center coordinates Get the weighted calculated circle center coordinates: .

[0015] In this embodiment, the preset minimum chord length is 40% of the design diameter, and the preset maximum chord length is 80% of the design diameter. The minimum chord length and the maximum chord length can be adjusted according to the actual construction environment and are not limited to the preferred values ​​given in the present invention.

[0016] In some embodiments, the center of the design O 0 elevation x 0= H + h ,in H is the track height of the reference plane calculated based on the average mileage and vertical curve, h The height difference between the rail surface and the center of the segment is a fixed value; the design center O 0 offset y 0=D, where D is the distance from the tunnel centerline to the designed horizontal curve, which is a constant, and the designed horizontal curve offset is 0.

[0017] In this embodiment, if Figure 2 As shown in the figure, for a shield tunnel, the height difference from the track surface to the center of the segment is a constant value; for a shield tunnel, the distance from the center line of the tunnel (segment) to the designed horizontal curve is a constant value D, the designed horizontal curve offset is 0, and the tunnel is the center of the segment. O 0 offset y 0=D.

[0018] The second aspect of the present invention provides: a large-diameter shield segment posture measurement system, used to implement any of the above-mentioned large-diameter shield segment posture measurement methods, comprising: The measuring point acquisition module is used to collect n measuring points on the same section on site, where n is greater than or equal to 2; and calculate the mileage, offset and track height of each measuring point; The reference plane calculation module is used to calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; and calculate the coordinates of the design circle center according to the average mileage and the height difference between the circle center and the rail surface before measuring the segment posture; The measuring point projection module is used to project n measuring points onto the reference plane according to the horizontal curve and the vertical curve, obtain multiple projection points corresponding to the measuring points and calculate the offset and elevation of the projection points; The circle center coordinate calculation module is used to calculate the weighted circle center coordinates according to the offset, elevation and segment design radius R of the projection point; The segment attitude measurement module is used to obtain the segment attitude by calculating the weighted elevation difference and offset difference between the calculated circle center coordinates and the designed circle center coordinates.

[0019] The third aspect of the present invention provides: a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by a processor, any of the above-mentioned large-diameter shield segment posture measurement methods is implemented.

[0020] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A method for measuring the posture of a large-diameter shield segment, characterized in that: The following steps are involved: S1: During the measurement point collection phase, n measurement points on the same section are collected on site, where n is greater than or equal to 2; And calculate the mileage, offset and track height of each measuring point; S2: Reference plane calculation stage, calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; Before executing the segment attitude measurement phase, the coordinates of the design circle center are calculated based on the average mileage and the height difference between the circle center and the track surface; S3: In the measurement point projection stage, n measurement points are projected onto the reference plane according to the horizontal curve and the vertical curve to obtain multiple projection points corresponding to the measurement points and calculate the offset and elevation of the projection points; S4: Calculation of the center coordinates of the circle, in which the weighted center coordinates are calculated based on the offset, elevation and segment design radius R of the projection point; S5: In the segment attitude measurement stage, the elevation difference and offset difference between the weighted calculated circle center coordinates and the designed circle center coordinates are calculated to obtain the segment attitude.

2. The large-diameter shield segment posture measurement method according to claim 1 is characterized in that: The step S4: calculating the center coordinates of the circle, further comprises the following steps: S41: Find the center of the designed circle Azimuth to the projection point ,in x 0 is the elevation of the design center. y 0 is the offset of the design center. is the i-th projection point The elevation of is the i-th projection point The offset of S42: Sort the azimuth angles from small to large, and the sorted azimuth angles are: , sort the projection points according to the sorting results of the azimuth angles, and the sorted results are ,in To design the azimuth from the center of the circle to the first projection point, is the azimuth from the center of the circle to the i-th projection point, To design the azimuth from the center of the circle to the nth projection point, is the first projection point after the projection points are sorted according to the azimuth sorting result. is the i-th projection point after the projection points are sorted according to the azimuth sorting result, is the nth projection point after the projection points are sorted according to the azimuth sorting result; S43: sort the projection points Any two points in the combination, calculate any two points arrive Distance and direction: get arrive Distance ,direction ; S44: Data elimination, when If the chord length is less than the preset minimum chord length or greater than the preset maximum chord length, it will not be included in the calculation; S45: Calculation arrive The center point coordinates : ； S46: Calculation M j To calculate the center O j Azimuth and distance: Azimuth: ,distance: ; S47: Calculation M j arrive O j Coordinate increment: ,get M j arrive O j Coordinate increment in elevation direction and the coordinate increment in the offset direction ; S48: Calculation Coordinates: ; S49: Determine the weights. O j The corresponding chord length is , sum up the lengths of all chords involved in the calculation ,right ; S410: Calculate the weighted average of the center coordinates Get the weighted calculated circle center coordinates: 。 3. The large-diameter shield segment posture measurement method according to claim 1 is characterized in that: Design center O 0 elevation x 0= H + h ,in H is the track height of the reference plane calculated based on the average mileage and vertical curve, h The height difference between the rail surface and the center of the segment is a fixed value; the design center O 0 offset y 0=D, where D is the distance from the tunnel centerline to the designed horizontal curve, which is a constant, and the designed horizontal curve offset is 0.

4. A large-diameter shield segment posture measurement system, characterized by: The method for measuring the posture of a large-diameter shield segment according to any one of claims 1 to 3 comprises: The measuring point acquisition module is used to collect n measuring points on the same section on site, where n is greater than or equal to 2; and calculate the mileage, offset and track height of each measuring point; The reference plane calculation module is used to calculate the average mileage of n measuring points, and take the section where the average mileage is located as the reference plane; and calculate the coordinates of the design circle center according to the average mileage and the height difference between the circle center and the rail surface before measuring the segment posture; The measuring point projection module is used to project n measuring points onto the reference plane according to the horizontal curve and the vertical curve, obtain multiple projection points corresponding to the measuring points and calculate the offset and elevation of the projection points; The circle center coordinate calculation module is used to calculate the weighted circle center coordinates according to the offset, elevation and segment design radius R of the projection point; The segment attitude measurement module is used to obtain the segment attitude by calculating the weighted elevation difference and offset difference between the calculated circle center coordinates and the designed circle center coordinates.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by the processor, the large-diameter shield segment posture measurement method as described in any one of claims 1-3 is implemented.

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