A method of inspecting a segment of a tunnel boring machine

Abstract

The application discloses a method for detecting a shield segment, and belongs to the technical field of shield engineering, and comprises the following steps: sequentially measuring three-dimensional coordinates of center points of standard blocks, abutting blocks and top sealing blocks of the shield segment; comparing the three-dimensional coordinates of the center points of the standard blocks, the abutting blocks and the top sealing blocks, and judging whether the center points of each part of the shield segment coincide; determining three-dimensional coordinates of the center point of the shield segment according to the three-dimensional coordinates of the center points of each part of the shield segment, comparing the three-dimensional coordinates of the center point of the shield segment with three-dimensional coordinates of a center point of a tunnel, and judging whether the center point of the shield segment coincides with the center point of the tunnel. The safety problem is solved, personnel do not need to work in a track area, and a safety accident caused by a muck car sliding is avoided, the three-dimensional coordinates of the center points of the standard blocks, the abutting blocks and the top sealing blocks are measured and compared, and the measurement accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) engineering technology, and in particular to a method for inspecting TBM segments. Background Technology

[0002] In existing subway tunnel construction, the most common construction method is the shield tunneling method, which requires a special machine called a tunnel boring machine (TBM). Where the TBM passes, a long tunnel is built. The control room controls the TBM's thrust, speed, direction, and other tunneling parameters; the soil and rocks cut by the cutterhead of the auger are transported out of the tunnel by dump trucks; the shield segment assembly machine assembles the shield segments sequentially, with six shield segments forming a ring of tunnel, including three standard segments, two adjacent segments, and one capping segment. The shield segments are the main assembly components of shield tunneling, forming the outermost barrier of the tunnel, and bearing the responsibility of resisting soil pressure, groundwater pressure, and some special loads.

[0003] Tunnel boring machine (TBM) segments are the permanent lining structure of shield tunnels. The quality of the TBM segments directly affects the overall quality and safety of the tunnel, as well as its waterproofing and durability. TBM segment attitude refers to the deviation of the TBM segments from the tunnel centerline and the position of the TBM during tunneling. Poor TBM segment attitude can cause misalignment of the formed segments, leading to improper sealing and tightening of the waterstops between adjacent segments, resulting in water leakage. Uneven or excessive thrust during tunneling can also cause uneven stress on the TBM segments, leading to cracks.

[0004] During the tunneling process, the posture of the formed shield segments is usually checked by machining an aluminum alloy ruler and placing a level on it. However, the biggest problems with this measurement method are that workers must go to the track area to place the ruler, which poses a great safety hazard; it also affects the segment assembly and delays the construction progress; and the measurement accuracy is not high. Summary of the Invention

[0005] This invention provides a method for detecting tunnel lining segments, which solves the above-mentioned technical problems.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] The method includes the following steps:

[0008] S1: Sequentially measure the three-dimensional coordinates of the center points of the standard block, adjacent block, and capping block of the tunnel segment;

[0009] S2: Compare the three-dimensional coordinates of the center points of the measured standard block, adjacent blocks, and capping block to determine whether the center points of each part of the segment coincide.

[0010] S3: Based on the three-dimensional coordinates of the center points of each segment, determine the three-dimensional coordinates of the center point of the segment, compare the three-dimensional coordinates of the center point of the segment with the three-dimensional coordinates of the center point of the tunnel, and determine whether the center point of the segment coincides with the center point of the tunnel.

[0011] Furthermore, the three-dimensional coordinates of the center points of the standard block, adjacent block, and capping block of the tunnel segment are measured sequentially, including the following steps:

[0012] To measure the center points of three standard blocks: Place the measuring ruler at an angle inside the standard blocks, take the first and second auxiliary measuring points at equal lengths from the center point of the measuring ruler to both ends, and attach reflectors at the two points. Measure the three-dimensional coordinates of the first and second auxiliary measuring points using a total station.

[0013] Take a third auxiliary measurement point and obtain its three-dimensional coordinates. The third auxiliary measurement point is on the same horizontal plane as the second auxiliary measurement point and coincides with the projection point of the first auxiliary measurement point on the horizontal plane.

[0014] Based on the three-dimensional coordinates of the first auxiliary measurement point, the second auxiliary measurement point, and the third auxiliary measurement point, the distance from the first auxiliary measurement point to the third auxiliary measurement point, and the distance from the second auxiliary measurement point to the third auxiliary measurement point are obtained respectively.

[0015] Calculate the azimuth angle of the side length from the second auxiliary measurement point to the third auxiliary measurement point based on the three-dimensional coordinates of the second and third auxiliary measurement points;

[0016] Based on the length of the measuring ruler and the radius of the standard block, obtain the distance from the center of the standard block to the center point of the first auxiliary measuring point and the center point of the second auxiliary measuring point;

[0017] Take the fourth auxiliary measurement point and obtain its three-dimensional coordinates. The fourth auxiliary measurement point and the center of the standard block are on the same horizontal plane, and the projection points of the center points of the fourth auxiliary measurement point, the first auxiliary measurement point, and the second auxiliary measurement point on the horizontal plane coincide.

[0018] Obtain the distance from the fourth auxiliary measurement point to the center point of the standard block, and the distance from the fourth auxiliary measurement point to the center point of the first and second auxiliary measurement points;

[0019] The three-dimensional coordinates of the center point of the first and second auxiliary measurement points, the distance from the fourth auxiliary measurement point to the center point of the standard block, the distance from the fourth auxiliary measurement point to the center point of the first and second auxiliary measurement points, and the azimuth angle of the side length from the second auxiliary measurement point to the third auxiliary measurement point are used to obtain the three-dimensional coordinates of the center point of the standard block.

[0020] Based on the above steps, the three-dimensional coordinates of the center points of two adjacent blocks and one capping block are obtained.

[0021] Furthermore, the three-dimensional coordinates of the center points of the measured standard block, adjacent blocks, and capping block are compared to determine whether the center points of each part of the segment coincide, including the following steps:

[0022] If they coincide, the three-dimensional coordinates of the center point of the segment are compared with the three-dimensional coordinates of the tunnel centerline to determine whether the three-dimensional coordinates of the center point of the segment coincide with the three-dimensional coordinates of the tunnel centerline.

[0023] If they do not coincide, the deviation of the center points of the standard block, adjacent block and capping block is calculated. If the deviation is less than the first preset value, the three-dimensional coordinates of the center point of the segment and the center line of the tunnel are judged to coincide. If the deviation is greater than the first preset value, the standard block, adjacent block and capping block are adjusted.

[0024] Furthermore, based on the three-dimensional coordinates of the center points of each segment, the three-dimensional coordinates of the segment's center point are determined. These coordinates are then compared with the three-dimensional coordinates of the tunnel's center point to determine if they coincide. This process includes the following steps:

[0025] If they overlap, the segment assembly is complete;

[0026] If they do not coincide, the deviation of the three-dimensional coordinates between the center point of the segment and the center line of the tunnel is calculated. If the deviation is less than the second preset value, the segment assembly is completed. If the deviation is greater than the second preset value, the segment is adjusted.

[0027] Furthermore, the range of the first preset value is 0 to 20 mm.

[0028] Furthermore, the range of the second preset value is 0 to 100 mm.

[0029] Furthermore, the second preset value is preferably 50mm.

[0030] Furthermore, the measuring ruler has adhesive for attaching pipe segments at both ends.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. It solves safety issues by eliminating the need for surveyors to work in the track area, thus preventing dump trucks from slipping and causing safety accidents.

[0033] 2. Improves construction progress, does not require occupying the space of the shield tunnel segment assembly area, and the shield tunnel segment assembly work does not need to wait until the measurement is completed;

[0034] 3. It is easier to operate. Simply place the ruler at any angle on the segment without using a spirit level. The operation is convenient, simple and quick.

[0035] 4. Higher precision, no need for leveling with a spirit level, resulting in higher accuracy.

[0036] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description. Attached Figure Description

[0037] Figure 1 A flowchart of the method for detecting tunnel lining segments according to this application is shown.

[0038] Figure 2 A schematic diagram illustrating the detection principle of the method for detecting tunnel lining segments according to this application is shown.

[0039] Attached reference numerals: 1-measuring ruler, 2-segment, 3-standard block, 4-adjacent block, 5-capping block, 6-total station, A-first auxiliary measuring point, B-second auxiliary measuring point, C-third auxiliary measuring point, D-third auxiliary measuring point, E-center point of the first and second auxiliary measuring points. Detailed Implementation

[0040] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0041] Those skilled in the art will understand that, in the disclosure of this specification, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. Therefore, the foregoing terms should not be construed as limiting the invention.

[0042] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0043] refer to Figure 1A method for inspecting tunnel lining segments according to a preferred embodiment of the present invention will be described in detail below, wherein the tunnel lining segments 2 are assembled sequentially by a tunnel lining segment assembly machine, and six tunnel lining segments 2 form a cylindrical tunnel, including three standard blocks 3, two adjacent blocks 4, and one capping block 5. The method includes the following steps:

[0044] S1: Sequentially measure the three-dimensional coordinates of the center points of the standard block 3, adjacent block 4, and capping block 5 of segment 2;

[0045] S2: Compare the three-dimensional coordinates of the center points of the measured standard block 3, adjacent block 4 and capping block 5 to determine whether the center points of each part of the segment 2 coincide.

[0046] S3: Based on the three-dimensional coordinates of the center points of each part of segment 2, determine the three-dimensional coordinates of the center point of segment 2, compare the three-dimensional coordinates of the center point of segment 2 with the three-dimensional coordinates of the center point of the tunnel, and determine whether the center point of segment 2 coincides with the center point of the tunnel.

[0047] It solves safety issues by eliminating the need for surveyors to work in the track area, thus preventing accidents caused by dump trucks slipping. It also improves construction progress by eliminating the need to occupy space in the shield tunnel segment assembly area, allowing the segment assembly work to proceed without waiting for the measurement to be completed. Operation is more convenient; simply place the ruler at any angle against the segment without the need for a spirit level, making operation easy, simple, and fast. Furthermore, it offers higher precision by eliminating the need for a spirit level, allowing for the measurement and comparison of the three-dimensional coordinates of the center points of standard block 3, adjacent block 4, and capping block 5, further improving measurement accuracy.

[0048] According to an embodiment of the present invention, the three-dimensional coordinates of the center points of the standard block 3, adjacent block 4, and capping block 5 of the segment 2 are measured sequentially, including the following steps:

[0049] Measure the center point of the three standard blocks 3: Place the measuring ruler 1 at an angle inside the standard block 3, take the first auxiliary measuring point A and the second auxiliary measuring point B at the same length from the center point of the measuring ruler 1 to both ends, and attach reflective sheets at the two points. Measure the three-dimensional coordinates of the first auxiliary measuring point A and the second auxiliary measuring point B using the total station 6.

[0050] Take the third auxiliary measurement point C and obtain the three-dimensional coordinates of the third auxiliary measurement point C. The third auxiliary measurement point C is on the same horizontal plane as the second auxiliary measurement point B and coincides with the projection point of the first auxiliary measurement point A on the horizontal plane.

[0051] Based on the three-dimensional coordinates of the first auxiliary measurement point A, the second auxiliary measurement point B, and the third auxiliary measurement point C, the distance from the first auxiliary measurement point A to the third auxiliary measurement point C, and the distance from the second auxiliary measurement point B to the third auxiliary measurement point C are obtained respectively.

[0052] Based on the three-dimensional coordinates of the second auxiliary measurement point B and the third auxiliary measurement point C, calculate the azimuth angle of the side length from the second auxiliary measurement point B to the third auxiliary measurement point C;

[0053] Based on the length of measuring ruler 1 and the radius of standard block 3, obtain the distance from the center of standard block 3 to the center point E of the first auxiliary measuring point A and the second auxiliary measuring point B;

[0054] Take the fourth auxiliary measurement point D and obtain the three-dimensional coordinates of the fourth auxiliary measurement point D. The fourth auxiliary measurement point D and the center of the standard block 3 are on the same horizontal plane, and the projection point of the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B on the horizontal plane coincides with the projection point of the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B.

[0055] Obtain the distance from the fourth auxiliary measurement point D to the center point of the standard block 3, and the distance from the fourth auxiliary measurement point D to the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B;

[0056] The three-dimensional coordinates of the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B, the distance from the fourth auxiliary measurement point D to the center point of the standard block 3, the distance from the fourth auxiliary measurement point D to the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B, and the azimuth angle of the side length from the second auxiliary measurement point B to the third auxiliary measurement point C are used to obtain the three-dimensional coordinates of the center point of the standard block 3.

[0057] Based on the above steps, the three-dimensional coordinates of the center points of the two adjacent blocks 4 and the capping block 5 are obtained.

[0058] Let the three-dimensional coordinates of the first auxiliary measurement point A be: A(Ax, Ay, Az); the three-dimensional coordinates of the second auxiliary measurement point B be: B(Bx, By, Bz); the three-dimensional coordinates of the third auxiliary measurement point C be: C(Cx, Cy, Cz); the three-dimensional coordinates of the fourth auxiliary measurement point D be: D(Dx, Dy, Dz); and the three-dimensional coordinates of the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B be: E(Ex, Ey, Ez). The three-dimensional coordinates of the first auxiliary measurement point A are: A(Ax, Ay, Az), and the three-dimensional coordinates of the second auxiliary measurement point B are: B(Bx, By, Bz). According to Ex = (Ax + Bx) / 2, Ey = (Ay + By) / 2, Ez = (Az + Bz) / 2, the three-dimensional coordinates of the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B are: E((Ax + Bx) / 2, (Ay + By) / 2, (Az + Bz) / 2).

[0059] Given the three-dimensional coordinates of the first auxiliary measurement point A: A(Ax, Ay, Az) and the three-dimensional coordinates of the second auxiliary measurement point B: B(Bx, By, Bz), and according to Cx = Ax, Cy = Ay, Cz = Bz, the three-dimensional coordinates of the third auxiliary measurement point C are obtained as C(Ax, Ay, Bz).

[0060] Let AC be the distance from the first auxiliary measurement point A to the third auxiliary measurement point C, and BC be the distance from the second auxiliary measurement point B to the third auxiliary measurement point C. We can then derive: AC = Az - Bz, BC = Cx - Bx. Let Fcb be the azimuth angle of the side length from the second auxiliary measurement point B to the third auxiliary measurement point C, and Fcb = tan⁻¹((By - Cy) / (Bx - Cx)).

[0061] Let OE be the distance from the center of standard block 3 to the center point E of the first auxiliary measuring point A and the second auxiliary measuring point B, let L be the length of measuring ruler 1, and let r be the radius of segment 2. Then...

[0062] Let the triangle formed by the first auxiliary measurement point A, the second auxiliary measurement point B, and the third auxiliary measurement point C be △ABC. According to ∠ABC = tan... -1 (AC / BC) gives the angle of ∠ABC. Then, based on ∠BAC = 180 - ∠ABC - 90, we can find the angle of ∠BAC.

[0063] Let △EDO be the triangle formed by the center point E of the fourth auxiliary measurement point D, the first auxiliary measurement point A, the second auxiliary measurement point B, and the center point of the standard block 3. Then we can conclude that ∠OED=∠ABC and ∠DOE=∠BAC.

[0064] Let OD be the distance from the fourth auxiliary measurement point D to the center of the standard block 3, and ED be the distance from the fourth auxiliary measurement point D to the center point E of the first auxiliary measurement point A and the second auxiliary measurement point B. According to OD = Sin(∠OED) × OE, the length of the OD side can be obtained; according to ED = Cos(∠OED) × OE, the length of the ED side can be obtained.

[0065] Let the three-dimensional coordinates of the center O of segment 2 be O(Ox, Oy, Oz). According to Ox=Ex+OD×Cos(Fcb), Oy=Ey+OD×Sin(Fcb), Oz=Ez+ED, the three-dimensional coordinates of the center O of segment 2 can be obtained.

[0066] According to an embodiment of the present invention, the three-dimensional coordinates of the center points of the measured standard block 3, adjacent block 4, and capping block 5 are compared to determine whether the center points of each part of the segment 2 coincide, including the following steps:

[0067] If they coincide, then continue to compare the three-dimensional coordinates of the center point of segment 2 with the three-dimensional coordinates of the tunnel centerline to determine whether the three-dimensional coordinates of the center point of segment 2 coincide with the three-dimensional coordinates of the tunnel centerline.

[0068] If they do not coincide, the deviation of the center points of standard block 3, adjacent block 4 and capping block 5 is calculated. If the deviation is less than the first preset value, the three-dimensional coordinates of the center point of segment 2 and the center line of the tunnel are judged to coincide. If the deviation is greater than the first preset value, the standard block 3, adjacent block 4 and capping block 5 are adjusted.

[0069] According to an embodiment of the present invention, the three-dimensional coordinates of the center point of segment 2 are determined based on the three-dimensional coordinates of the center points of each part of segment 2. The three-dimensional coordinates of the center point of segment 2 are then compared with the three-dimensional coordinates of the center point of the tunnel to determine whether the center point of segment 2 coincides with the center point of the tunnel. This includes the following steps:

[0070] If they overlap, the assembly of segment 2 is complete;

[0071] If they do not coincide, calculate the deviation of the three-dimensional coordinates between the center point of segment 2 and the center line of the tunnel. If the deviation is less than the second preset value, the assembly of segment 2 is completed. If the deviation is greater than the second preset value, segment 2 is adjusted.

[0072] According to one embodiment of the present invention, the range of the first preset value is 0 to 20 mm.

[0073] According to one embodiment of the present invention, the range of the second preset value is 0 to 100 mm.

[0074] According to one embodiment of the present invention, the second preset value is preferably 50 mm.

[0075] According to one embodiment of the present invention, the measuring ruler 1 is provided with adhesive at both ends for attaching the pipe segment 2. The measuring ruler 1 can be adhered to the pipe segment 2, preventing the position of the measuring ruler 1 from changing during the measurement process and affecting the measurement results, thereby improving the accuracy of the measurement.

[0076] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A method for inspecting tunnel lining segments, characterized in that, The method includes the following steps: S1: Measure the three-dimensional coordinates of the center points of the standard block (3), adjacent block (4) and capping block (5) of the segment (2) in sequence; S2: Compare the three-dimensional coordinates of the center points of the measured standard block (3), adjacent block (4) and capping block (5) to determine whether the center points of each part of the pipe segment (2) coincide. S3: Based on the three-dimensional coordinates of the center points of each part of the pipe segment (2), determine the three-dimensional coordinates of the center point of the pipe segment (2), compare the three-dimensional coordinates of the center point of the pipe segment (2) with the three-dimensional coordinates of the center point of the tunnel, and determine whether the center point of the pipe segment (2) coincides with the center point of the tunnel. The three-dimensional coordinates of the center points of the standard block (3), adjacent block (4), and capping block (5) of the segment (2) are measured in sequence, including the following steps: Measure the center point of three standard blocks (3): Place the measuring ruler (1) at an angle inside the standard block (3), take the first auxiliary measuring point (A) and the second auxiliary measuring point (B) at the same length from the center point of the measuring ruler (1) to both ends, and attach reflective sheets at the two points. Measure the three-dimensional coordinates of the first auxiliary measuring point (A) and the second auxiliary measuring point (B) using a total station (6). Take the third auxiliary measurement point (C) and obtain the three-dimensional coordinates of the third auxiliary measurement point (C). The third auxiliary measurement point (C) and the second auxiliary measurement point (B) are on the same horizontal plane and coincide with the projection point of the first auxiliary measurement point (A) on the horizontal plane. Based on the three-dimensional coordinates of the first auxiliary measurement point (A), the second auxiliary measurement point (B), and the third auxiliary measurement point (C), the distance from the first auxiliary measurement point (A) to the third auxiliary measurement point (C) and the distance from the second auxiliary measurement point (B) to the third auxiliary measurement point (C) are obtained respectively. Based on the three-dimensional coordinates of the second auxiliary measurement point (B) and the third auxiliary measurement point (C), calculate the azimuth angle of the side length from the second auxiliary measurement point (B) to the third auxiliary measurement point (C); Based on the length of the measuring ruler (1) and the radius of the standard block (3), the distance from the center of the standard block (3) to the center point (E) of the first auxiliary measuring point (A) and the second auxiliary measuring point (B) is obtained; Take the fourth auxiliary measurement point (D) and obtain the three-dimensional coordinates of the fourth auxiliary measurement point (D). The center of the fourth auxiliary measurement point (D) and the center of the standard block (3) are on the same horizontal plane, and the projection point of the fourth auxiliary measurement point (D) on the horizontal plane coincides with the center point (E) of the first auxiliary measurement point (A) and the second auxiliary measurement point (B). Obtain the distance from the fourth auxiliary measurement point (D) to the center point of the standard block (3), and the distance from the fourth auxiliary measurement point (D) to the center point (E) of the first auxiliary measurement point (A) and the second auxiliary measurement point (B); Based on the three-dimensional coordinates of the center point (E) of the first auxiliary measurement point (A) and the second auxiliary measurement point (B), the distance from the fourth auxiliary measurement point (D) to the center point of the standard block (3), the distance from the fourth auxiliary measurement point (D) to the center point (E) of the first auxiliary measurement point (A) and the second auxiliary measurement point (B), and the azimuth angle of the side length from the second auxiliary measurement point (B) to the third auxiliary measurement point (C), the three-dimensional coordinates of the center point of the standard block (3) are obtained. Based on the above steps, the three-dimensional coordinates of the center points of two adjacent blocks (4) and one capping block (5) are obtained.

2. The method for detecting tunnel lining segments as described in claim 1, characterized in that, The three-dimensional coordinates of the center points of the measured standard block (3), adjacent block (4), and capping block (5) are compared to determine whether the center points of each part of the segment (2) coincide. The steps include the following: If they coincide, then continue to compare the three-dimensional coordinates of the center point of the segment (2) with the three-dimensional coordinates of the center line of the tunnel to determine whether the three-dimensional coordinates of the center point of the segment (2) coincide with the three-dimensional coordinates of the center line of the tunnel. If they do not overlap, calculate the deviation of the center point of the standard block (3), adjacent block (4) and capping block (5). If the deviation is less than the first preset value, continue to judge whether the three-dimensional coordinates of the center point of the segment (2) and the center line of the tunnel overlap. If the deviation is greater than the first preset value, adjust the standard block (3), adjacent block (4) and capping block (5).

3. The method for detecting tunnel lining segments as described in claim 2, characterized in that, Based on the three-dimensional coordinates of the center points of each part of the tunnel segment (2), the three-dimensional coordinates of the center point of the tunnel segment (2) are determined. The three-dimensional coordinates of the center point of the tunnel segment (2) are compared with the three-dimensional coordinates of the center point of the tunnel to determine whether the center point of the tunnel segment (2) coincides with the center point of the tunnel. The process includes the following steps: If they overlap, the assembly of segment (2) is complete; If they do not coincide, calculate the deviation of the three-dimensional coordinates between the center point of the segment (2) and the center line of the tunnel. If the deviation is less than the second preset value, the assembly of the segment (2) is completed. If the deviation is greater than the second preset value, the segment (2) is adjusted.

4. The method for detecting tunnel lining segments as described in claim 3, characterized in that, The range of the first preset value is 0~20mm.

5. The method for detecting tunnel lining segments as described in claim 4, characterized in that, The range of the second preset value is 0~100mm.

6. The method for detecting tunnel lining segments as described in claim 5, characterized in that, The second preset value is 50mm.

7. The method for detecting tunnel lining segments as described in claim 1, characterized in that, The measuring ruler (1) has adhesive at both ends for attaching the pipe segments (2).

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