Subway subgrade settlement detection device based on regenerated filler subgrade

Abstract

A subway subgrade settlement detection device based on a regenerated filler subgrade comprises a position identification block, a settlement detection datum plate and a test trolley. The test trolley can move along a subway track, and a mark identification sensor and a laser range finder are mounted on the test trolley; the settlement detection datum plates are arranged at the top of the subway tunnel, the position identification blocks and the settlement detection datum plates are arranged along the tunnel at equal intervals, and the position identification blocks and the settlement detection datum plates are in one-to-one correspondence; and when the mark identification sensor identifies a certain position identification block, the laser range finder measures the distance of the settlement detection datum plate corresponding to the position identification block. In the walking process of the test trolley, a curve with the track length as the abscissa and the settlement amount as the ordinate can be obtained, and the settlement condition of the subway subgrade can be visually reflected according to the curve. Compared with an existing roadbed settlement detection device, the local railway foundation settlement detection device is high in automation degree and high in efficiency, and the overhaul window period is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of subway transportation, in particular to a subway roadbed settlement detection device based on a recycled filler roadbed. Background Art

[0002] Urban construction will generate a large amount of construction waste, such as broken bricks, concrete blocks, etc. These construction wastes have occupied land resources for a long time and have not been properly handled. Using recycling technology, construction waste can be broken into small stones, which can be used as fillers for railway roadbeds instead of gravel, which is environmentally friendly and energy-saving, and benefits the country and the people.

[0003] For the subway, rails and sleepers are laid on gravel (filler), which is part of the roadbed. Loose gravel or ground settlement will cause the rails to bend and deform, affecting the normal operation of the subway. The hardness, strength and other indicators of stones recycled from construction waste vary greatly. Compared with natural gravel, stones, as carriers of rails and sleepers, are more likely to become loose and slip, which in turn causes the roadbed to settle. Therefore, it is necessary to use a roadbed settlement detection device to regularly inspect the subway roadbed and repair the settled parts. However, the existing roadbed settlement detection devices mostly use optical measurement methods, which are not only cumbersome to operate, but also inefficient, which seriously prolongs the maintenance window period. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model discloses a subway railway subgrade settlement detection device based on a recycled filler roadbed, and the subway railway subgrade settlement detection device adopts the following technical solutions:

[0005] A subway subgrade settlement detection device based on a recycled filler subgrade comprises a position identification block, a settlement detection reference plate and a test trolley; the test trolley can move along the subway track, and a mark recognition sensor and a laser rangefinder are installed on the test trolley; the settlement detection reference plate is arranged on the top of the subway tunnel, the position identification block and the settlement detection reference plate are arranged equidistantly along the tunnel, and the position identification block corresponds to the settlement detection reference plate one by one; when the mark recognition sensor recognizes a certain position identification block, the laser rangefinder measures the distance of the settlement detection reference plate corresponding to the position identification block.

[0006] To further improve the technical solution, a lithium battery and a motor are installed on the test trolley, and the lithium battery and the motor are used to drive the test trolley to move on the subway track.

[0007] To further improve the technical solution, a control system is installed on the test vehicle, which is connected to the motor and the laser rangefinder. When the sign recognition sensor identifies a position identification block, the control system causes the test vehicle to slow down or stop, and the laser rangefinder starts to measure the distance to the settlement detection reference plate corresponding to the position identification block.

[0008] To further improve the technical solution, the distance between two adjacent position identification blocks is 5 meters or 10 meters.

[0009] In order to further improve the technical solution, the settlement detection reference plates are set at the same height based on the designed track laying surface.

[0010] To further improve the technical solution, each position identification block is set on the facade of the tunnel, and the sign recognition sensor is placed horizontally.

[0011] After implementing the above technical solution, compared with the background technology, the beneficial effects produced by the utility model are:

[0012] The local railway subgrade settlement detection device consists of a position identification block, a settlement detection reference plate and a test trolley. The test trolley can move on the subway track by itself. A mark recognition sensor and a laser rangefinder are installed on the test trolley. During the movement of the test trolley, a curve with the track length as the horizontal coordinate and the settlement amount as the vertical coordinate can be obtained. The settlement of the subway subgrade can be intuitively reflected based on the curve.

[0013] Compared with the existing roadbed settlement detection devices, the local railway roadbed settlement detection device has a high degree of automation and efficiency, which greatly shortens the maintenance window period. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 Shown is a lateral view of a local railway bed settlement detection device in a tunnel.

[0015] Attached Figure 2 Shown is a longitudinal view of a local railway bed settlement detection device in a tunnel.

[0016] In the attached figure: 1. recycled filler; 2. sleeper; 3. track; 4. position identification block; 5. settlement detection reference plate; 6. test trolley; 7. mark recognition sensor; 8. laser rangefinder. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0018] As attached Figure 1 As shown, a subway subgrade settlement detection device based on a recycled filler subgrade includes a position identification block 4, a settlement detection reference plate 5 and a test trolley 6. The structure and function thereof are described in detail below.

[0019] See attached Figure 1 and attached Figure 2 In the subway tunnel, a roadbed made of recycled filler 1 is laid, and sleepers 2 and rails 3 are laid on the recycled filler 1. As a carrier for the rails 3 and sleepers 2, the recycled filler 1 is more likely to become loose and slip, thereby causing the roadbed to settle.

[0020] In order to solve the problem in the background technology, the position identification block 4 is set on the facade of the tunnel, and the settlement detection reference plate 5 is fixed on the top of the subway tunnel, which is opposite to the subway track 3. The position identification block 4 and the settlement detection reference plate 5 are arranged equidistantly along the tunnel, and the position identification block 4 corresponds to the settlement detection reference plate 5 one by one.

[0021] For the convenience of positioning and measurement, the distance between two adjacent position identification blocks 4 is 5 meters or 10 meters. Based on the designed track 3 paving surface, each settlement detection reference plate 5 is set at the same height, that is, when there is no settlement of the roadbed, the height of each settlement detection reference plate 5 to the track 3 is equal.

[0022] The test trolley 6 has wheels and can move forward and backward along the subway track 3. A mark recognition sensor 7 and a laser rangefinder 8 are installed on the test trolley 6. The detection head of the mark recognition sensor 7 is placed horizontally and aligned with the position identification block 4. The measuring head of the laser rangefinder 8 is placed vertically and aligned with the settlement detection reference plate 5.

[0023] The mark recognition sensor 7 and the laser rangefinder 8 are existing equipment. The mark recognition sensor 7 can be a camera, an infrared detector, a magnetic induction detector, etc. When the mark recognition sensor 7 is aligned with the position identification block 4, the mark recognition sensor 7 triggers the induction, and then obtains the position information of the movement of the test trolley 6. For example, the test trolley 6 passes by five position identification blocks 4 during the movement, and the mark recognition sensor 7 is triggered five times. If the distance between two adjacent position identification blocks 4 is 10 meters, it means that the test trolley 6 has moved forward 50-60 meters from the starting point.

[0024] For ease of operation, a lithium battery and a motor are installed on the test trolley 6 , and driven by the lithium battery and the motor, the test trolley 6 can move along the subway track 3 by itself.

[0025] Working principle:

[0026] When the test trolley 6 is moving, when the mark recognition sensor 7 recognizes a certain position identification block 4 , the laser rangefinder 8 measures the distance of the settlement detection reference plate 5 corresponding to the position identification block 4 .

[0027] The laser rangefinder 8 is an instrument that uses laser to measure distance, and its error is only one-fifth to one-hundredth of other optical rangefinders. If the distance measured by the laser rangefinder 8 is greater than the originally set distance, it means that the subway foundation has settled. Since the position identification block 4 corresponds to the settlement detection reference plate 5 one by one, the position where the subway foundation has settled can be calibrated by the mark recognition sensor 7. By analogy, when the test trolley 6 completes the inspection, a curve with the length of the track 3 as the horizontal coordinate and the settlement amount as the vertical coordinate can be obtained, and the settlement of the subway foundation can be intuitively reflected according to the curve.

[0028] In order to avoid the laser rangefinder 8 from shaking during the measurement process, the test trolley 6 is preferably in a low-speed driving or parking state. To this end, the technical solution is further improved: a control system is also installed on the test trolley 6, and the control system is connected to the motor and the laser rangefinder 8. When the mark recognition sensor 7 recognizes a certain position identification block 4, the control system causes the test trolley 6 to slow down or stop, and at this time the laser rangefinder 8 starts to measure the distance of the settlement detection reference plate 5 corresponding to the position identification block 4.

[0029] As can be seen from the above, the local railway subgrade settlement detection device is composed of a position identification block 4, a settlement detection reference plate 5 and a test trolley 6. The test trolley 6 can move on the subway track 3 by itself, and a mark recognition sensor 7 and a laser rangefinder 8 are installed on the test trolley 6. During the movement of the test trolley 6, a curve with the length of the track 3 as the horizontal coordinate and the settlement amount as the vertical coordinate can be obtained, and the settlement of the subway subgrade can be intuitively reflected according to the curve.

[0030] Compared with the existing roadbed settlement detection devices, the local railway roadbed settlement detection device has a high degree of automation and efficiency, which greatly shortens the maintenance window period.

[0031] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A subway subgrade settlement detection device based on recycled filler subgrade, characterized by: It includes a position identification block, a settlement detection reference plate and a test trolley; the test trolley can move along the subway track, and a mark recognition sensor and a laser rangefinder are installed on the test trolley; the settlement detection reference plate is arranged on the top of the subway tunnel, the position identification block and the settlement detection reference plate are arranged equidistantly along the tunnel, and the position identification block corresponds to the settlement detection reference plate one by one; when the mark recognition sensor identifies a certain position identification block, the laser rangefinder measures the distance to the settlement detection reference plate corresponding to the position identification block.

2. A subway subgrade settlement detection device based on a recycled filler subgrade as claimed in claim 1, characterized in that: The test trolley is equipped with a lithium battery and a motor, which are used to drive the test trolley to move on the subway track.

3. A subway subgrade settlement detection device based on a recycled filler subgrade as claimed in claim 2, characterized in that: The test trolley is also equipped with a control system, which is connected to the motor and the laser rangefinder. When the sign recognition sensor identifies a position identification block, the control system causes the test trolley to slow down or stop. At this time, the laser rangefinder starts to measure the distance of the settlement detection reference plate corresponding to the position identification block.

4. The device for detecting the settlement of a subway subgrade based on a recycled filler subgrade according to claim 1, characterized in that: The distance between two adjacent location identification blocks is 5 meters or 10 meters.

5. The device for detecting the settlement of a subway subgrade based on a recycled filler subgrade according to claim 1, characterized in that: Based on the designed track laying surface, each settlement detection reference plate is set at the same height.

6. A subway subgrade settlement detection device based on a recycled filler subgrade as claimed in claim 1, characterized in that: Each position identification block is set on the facade of the tunnel, and the sign recognition sensor is placed horizontally.

Images