Shield tunnel arc segment slab staggering photoelectric measuring device and measuring method

Abstract

The invention discloses a shield tunnel arc segment slab staggering photoelectric measurement device and a measurement method, and belongs to the technical field of tunnel engineering construction. The center position between the two distance probes is aligned with the center of the slab staggering joint between the two segments to be measured to measure the vertical distance between the two segments, the difference of the vertical distance between the two segments is obtained to obtain the slab staggering value, photoelectric distance measurement is adopted, and errors caused by manual reading are avoided; meanwhile, the contact points are arranged to be in complete contact with the surface of the attached pipe piece, stress points for preventing shaking during measurement are formed, and shaking errors generated during measurement are avoided. The method is simple, fast and easy to operate, can be completed by only one person, saves labor force, and further improves detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering construction, and more particularly to a photoelectric measuring device and a measuring method for the misalignment of arc-shaped segments in a shield tunnel. Background Art

[0002] During the shield tunneling construction process, arc segment misalignment is one of the main control items to measure the quality of the shield tunnel. The segment misalignment is the misalignment within a ring after a ring of segments is assembled and the misalignment between adjacent rings.

[0003] The specification requires that the segment misalignment measurement method be measured by combining a steel ruler and a feeler gauge. The principle is to use a steel ruler to convert the misalignment value into a gap value, and then use a feeler gauge to measure the gap value, which is the segment misalignment value. In the case of uneven curved surfaces of adjacent segments, first place a steel ruler perpendicular to the annular seam or longitudinal seam and close to the raised segment curved surface, then insert the feeler gauge into the gap between the steel ruler and the curved surface of another segment, and finally the value read by the feeler gauge is the segment misalignment value.

[0004] The existing tool methods have the following disadvantages:

[0005] (1) When the measuring ring is misaligned, the segments are arc-shaped, while the steel ruler and feeler gauge are straight lines. Since the steel ruler needs to be perpendicular to the longitudinal seam during measurement, the steel ruler cannot fit closely with it, resulting in measurement errors.

[0006] (2) During the measurement process, one hand needs to hold the steel ruler and the other hand needs to hold the feeler gauge, which is inconvenient to operate. In addition, when taking video data, a second person is required to cooperate, which is labor-intensive. When taking video data, due to different shooting angles, it is easy to cause the observed value to be inconsistent with the measured true value.

[0007] (3) There are many things to pay attention to, and it is not easy for novices to get started.

[0008] Therefore, it is an urgent problem to be solved by technical personnel in this field to propose a photoelectric measuring device and method for the misalignment of arc-shaped segments in shield tunnels to achieve rapid and accurate measurement of the misalignment of arc-shaped segments. Summary of the invention

[0009] In view of this, the present invention provides a photoelectric measuring device and method for the misalignment of arc-shaped segments in a shield tunnel. By utilizing the laser measurement principle, a high-precision laser ranging sensor is installed, and a digital display screen is combined to quickly and accurately complete the measurement of the misalignment of arc-shaped segments.

[0010] In order to achieve the above object, the present invention adopts the following technical solution:

[0011] On the one hand, the present invention discloses a shield tunnel arc segment misalignment photoelectric measurement device, including a measuring body, a contact point, a single chip computer, a display screen and two distance probes;

[0012] The single chip microcomputer is placed inside the measuring body, and the single chip microcomputer is respectively connected to the contact point, the display screen, and the distance probe;

[0013] The contact point and the two distance probes are sequentially installed on the same side of the measuring body.

[0014] Preferably, the contact point is a cylinder, which fits the pipe segment to be tested;

[0015] The distance probe is used to measure the vertical distance of the pipe segment to be measured;

[0016] The single chip computer is used to calculate the misalignment value according to the vertical distance of the pipe segment to be measured.

[0017] Preferably, the diameter of the contact point is 0.03 m.

[0018] Preferably, the vertical distance of the pipe segment to be tested is:

[0019] When the contact point fits the segment to be tested, the distance between the probe and the corresponding segment to be tested.

[0020] On the other hand, the present invention also discloses a shield tunnel arc segment misalignment photoelectric measurement method, which is implemented based on the above-mentioned shield tunnel arc segment misalignment photoelectric measurement device, and includes the following steps:

[0021] Select 2 segments to be tested;

[0022] The contact point is completely in contact with one of the segments to be tested;

[0023] Determine the offset seam between the two segments to be tested, so that the two distance probes are symmetrically distributed around the offset seam, and the two distance probes measure the vertical distance between the two segments to be tested respectively;

[0024] The misalignment value is calculated according to the vertical distance between the two segments to be tested, and the misalignment value is displayed on a display screen.

[0025] Preferably, the misalignment value is the difference in vertical distances between two segments to be tested.

[0026] It can be seen from the above technical solutions that the present invention discloses a shield tunnel arc segment misalignment photoelectric measurement device and measurement method, which has the following beneficial effects compared with the prior art:

[0027] 1. The present invention aligns the center position between two distance probes with the center of the misalignment seam between two segments to be measured to measure the vertical distance between the two segments, and obtains the misalignment value by subtracting the vertical distance between the two segments. Photoelectric distance measurement is used to avoid errors caused by manual readings. At the same time, the present invention sets the contact point to completely contact and fit the segment surface, forming a force point to prevent jitter during measurement, thereby avoiding jitter errors generated during measurement.

[0028] 2. The method of the present invention is simple, quick and easy to use, and can be completed by only one person, saving labor and further improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a photoelectric measuring device for arc segment misalignment in a shield tunnel provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the misalignment value measurement provided by the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] On the one hand, the embodiment of the present invention discloses a photoelectric measurement device for arc segment misalignment in a shield tunnel, such as Figure 1-Figure 2 As shown, the measuring device includes a measuring body, a contact point, a single chip microcomputer, a display screen and two distance probes.

[0034] The single chip microcomputer is placed inside the measuring body, and the single chip microcomputer is connected with the contact point, the display screen, and the distance probe respectively;

[0035] The contact point and two distance probes are installed in sequence on the same side of the measurement body;

[0036] The device is activated or deactivated by means of a switch.

[0037] The contact point is a cylinder with a diameter of 0.03m, which fits the pipe segment to be measured and serves as a force point to prevent shaking during measurement.

[0038] The diameter of shield tunnel segments is generally 3m to 7m, and the largest segment diameter in China is 11.6m. In a circle with a minimum diameter of 3m, a contact point with a diameter of 0.03m can fit it completely.

[0039] The distance probe is used to measure the vertical distance of the segment to be tested. The vertical distance of the segment to be tested is: the distance between the distance probe and the corresponding segment to be tested when the contact point fits the segment to be tested.

[0040] The single chip microcomputer is used to calculate the misalignment value according to the vertical distance of the pipe segment to be measured.

[0041] The display screen is used to display data such as the vertical distance and misalignment value of the segment to be tested and the operation interface.

[0042] On the other hand, the embodiment of the present invention also discloses a shield tunnel arc segment misalignment photoelectric measurement method, which is implemented based on the above-mentioned shield tunnel arc segment misalignment photoelectric measurement device (refer to Figure 2 ), including the following steps:

[0043] Select 2 segments to be tested;

[0044] The contact point is completely in contact with one of the segments to be tested;

[0045] Determine the offset seam between the two segments to be tested, so that the two distance probes are symmetrically distributed around the offset seam, and the two distance probes measure the vertical distances L1 and L2 of the two segments to be tested respectively;

[0046] The misalignment value is calculated according to the vertical distance between the two segments to be tested, and the misalignment value is displayed on the display screen.

[0047] Preferably, the misalignment value is the difference in vertical distances between the two segments to be tested, that is, the misalignment value = L1 - L2.

[0048] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photoelectric measuring device for arc segment misalignment in a shield tunnel, characterized in that: It includes measuring body, contact point, single chip microcomputer, display screen and 2 distance probes; The single chip microcomputer is placed inside the measuring body, and the single chip microcomputer is respectively connected to the contact point, the display screen, and the distance probe; The contact point and the two distance probes are sequentially installed on the same side of the measuring body.

2. The photoelectric measuring device for arc segment misalignment of a shield tunnel according to claim 1 is characterized in that: The contact point is a cylinder, which fits the pipe segment to be tested; The distance probe is used to measure the vertical distance of the pipe segment to be measured; The single chip computer is used to calculate the misalignment value according to the vertical distance of the pipe segment to be measured.

3. The photoelectric measuring device for arc segment misalignment of a shield tunnel according to claim 2 is characterized in that: The diameter of the contact point is 0.03 m.

4. The photoelectric measuring device for arc segment misalignment of a shield tunnel according to claim 2 is characterized in that: The vertical distance of the segment to be tested is: When the contact point fits the segment to be tested, the distance between the probe and the corresponding segment to be tested.

5. A shield tunnel arc segment misalignment photoelectric measurement method, based on a shield tunnel arc segment misalignment photoelectric measurement device as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Select 2 segments to be tested; The contact point is completely in contact with one of the segments to be tested; Determine the offset seam between the two segments to be tested, so that the two distance probes are symmetrically distributed around the offset seam, and the two distance probes measure the vertical distance between the two segments to be tested respectively; The misalignment value is calculated according to the vertical distance between the two segments to be tested, and the misalignment value is displayed on a display screen.

6. A shield tunnel arc segment misalignment photoelectric measurement method according to claim 5, characterized in that: The misalignment value is the difference in vertical distance between the two segments to be tested.

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