A device and method for detecting the flatness of tunnel invert concrete construction

Abstract

The application discloses a kind of flatness detection device and method of tunnel inverted arch concrete construction, including support walking frame, support walking frame is equipped with swing power box, the output shaft of swing power box is fixedly connected swing rod, swing rod lower end is provided with sliding cavity, sliding cavity is slidably connected with support rod, sliding cavity upper end inner wall is fixedly connected with telescopic rod, support spring is fixedly connected between support rod and telescopic rod, displacement sensor is arranged between support rod and telescopic rod;The side of support rod is fixedly connected with cross bar, and distance sensor is arranged at the bottom of cross bar with interval;The bottom of support rod is fixedly connected with cylinder, and the bottom of cylinder is in open structure, and planer is rotatably connected in cylinder.The present application is swung by swing rod, and support spring is used to press cylinder tightly and touch to groove bottom, and the necessary cleaning is carried out to inverted arch base along with swing, to fill the surface of inverted arch concrete after pouring as the reference of measurement, to ensure the consistency of pouring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel inverted arch flatness detection, and particularly relates to a flatness detection device and method for tunnel inverted arch concrete construction. BACKGROUND

[0002] The inverted arch is a reverse arch structure arranged at the bottom of the tunnel to improve the stress condition of the upper support structure, is one of the main components of the tunnel structure, can effectively transmit the stratum pressure of the upper tunnel to the underground through the tunnel side wall structure or the load on the road surface, and effectively resists the reaction force from the lower stratum of the tunnel.

[0003] With the continuous increase of railway operation speed, the requirement for tunnel construction quality is higher and higher, and the virtual slag generated in the inverted arch construction directly affects the combination of the poured concrete and the tunnel; meanwhile, the measurement distance between the bottom of the inverted arch without pouring and the surface of the inverted arch filling concrete needs to be detected in steps, but this detection method is prone to detection errors, causing poor pouring consistency (such as local thickness of the inverted arch filling concrete not meeting the design standard). SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide a flatness detection device and method for tunnel inverted arch concrete construction.

[0005] In order to solve the above problems, the present application adopts the following technical scheme:

[0006] A flatness detection device for tunnel inverted arch concrete construction, comprising a support walking frame supported on the inner wall of the tunnel on both sides, a swing power box is arranged at one end of the support walking frame, a swing rod extending downward is fixedly connected to the output shaft of the swing power box, a vertical sliding cavity is arranged at the lower end of the swing rod, a support rod is slidably connected in the sliding cavity, a telescopic rod is fixedly connected to the inner top surface of the sliding cavity, a support spring is fixedly connected between the support rod and the telescopic rod, and a displacement sensor is arranged between the support rod and the telescopic rod;

[0007] A cross bar is fixedly connected to one side of the support rod, and two distance sensors are arranged at the bottom of the cross bar in intervals.

[0008] The bottom of the support rod is fixedly connected with a cylinder, the bottom of the cylinder is in an open structure, a planer is rotatably connected in the cylinder, and the lower end of the planer extends out of the open structure.

[0009] Preferably, the distance sensor is a laser distance sensor, an ultrasonic distance sensor or an infrared distance sensor.

[0010] Preferably, the support walking frame comprises a control box, hydraulic rods are hingedly connected to the two sides of the control box, and at least two rollers supported on the inner wall of the tunnel are arranged at the lower end of each hydraulic rod; and the swing power box is arranged at one end of the control box.

[0011] Preferably, a vertical plate is fixedly connected to one end of the control box, a vertical sliding groove is arranged in the vertical plate, a sliding block is slidably connected in the sliding groove, and the swing power box is fixedly connected to one side of the sliding block.

[0012] A linear driving device connected with the sliding block is mounted on the vertical plate, and the sliding block slides in the sliding groove under the driving of the linear driving device.

[0013] Preferably, a sliding groove is arranged at the bottom of the cross rod, a sliding rod is slidably connected in the sliding groove, a distance sensor is fixedly connected to the bottom of the sliding rod, a hook spring is fixedly connected between one end of the sliding rod and the inner wall of one end of the sliding groove, a steel wire rope is fixedly connected between the other end of the sliding rod and the support rod and passes above the cross rod, and avoiding grooves are arranged on the two sides of the swing rod.

[0014] A flatness detection method for tunnel inverted arch concrete construction, which adopts the flatness detection device to detect the tunnel inverted arch concrete construction, and the specific detection method is as follows:

[0015] The entire flatness detection device is supported on the inner wall of the tunnel through the support walking frame, and the extension rod is elongated so that the planer contacts the cleaned dross;

[0016] The swing rod is controlled to swing through the swing power box, and the planer cleans the dross of the inverted arch base along with the swinging of the swing rod.

[0017] The advantages of the present application are as follows: the flatness detection device and method for tunnel inverted arch concrete construction provided by the present application are supported in the tunnel through the support walking frame, and can be detected along the tunnel direction in cooperation with the construction through traction or power setting. After the steel frame is installed in the inverted arch, there is dross in the groove between the adjacent steel frames. The dross is cleaned through the swinging of the swing rod. During the swinging of the swing rod, the supporting spring plays a role of pressing the cylinder against the bottom of the groove. The inverted arch is cleaned as necessary along with the swinging, the cross rod moves along with the support rod in this process, the surface of the filled concrete of the inverted arch after pouring is taken as a reference for measurement, the relationship between the foundation before pouring and the concrete surface after pouring is detected, and the consistency of pouring is ensured.

[0018] This invention utilizes the telescopic movement of the support rod relative to the swing rod. Due to the telescopic movement of the support rod, the sliding rod changes position within the sliding groove through the traction of the steel wire rope. As shown in the figure, the position measured by the distance sensor moves from point A to point B, and the detected position changes along the direction of the tunnel, thereby avoiding inaccurate distance detection at a single location. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the basic structure of the present invention;

[0020] Fig. 2 This is a schematic diagram of the invention in use inside a tunnel;

[0021] Fig. 3 This is a schematic diagram of the connection structure between the swing rod and the support rod of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] Example 1

[0024] like Figs. 1-3 As shown, the present invention provides a flatness detection device for the construction of tunnel invert concrete, including a support walking frame 1 supported on both sides of the tunnel inner wall, and a swing power box 10 at one end of the support walking frame 1. Specifically, the support walking frame 1 includes a control box 11, and the swing power box 10 is set at one end of the control box 11. Hydraulic rods 12 are hinged to both sides of the control box 11, preferably two on each side. The hydraulic rods 12 are inclined, and at least two rollers 13 supported on the tunnel inner wall are set at the lower end of each hydraulic rod 12. The whole device is sent into the tunnel by a crane. A vertical plate 14 is fixedly connected to one end of the control box 11. A vertical groove 15 is set in the vertical plate 14. A slider is slidably connected in the groove 15. The swing power box 10 is fixedly connected to one side of the slider so as to make vertical adjustment with the slider.

[0025] By extending the hydraulic rod 12, the roller 13 supports the inner wall of the tunnel, making the entire flatness detection device suspended in the air under the action of the supporting walking frame 1. The space below facilitates the passage of the equipment. The control box 11 and the swing power box 10 serve as counterweight structures, and the four hydraulic rods 12 are respectively supported on the inner walls of the tunnel on both sides, resulting in high support stability.

[0026] The slider is driven to slide in the sliding groove 15 by a linear driving device adopting a conventional structure such as a hydraulic rod, a motor lead screw mechanism, etc. The output shaft of the swing power box 10 is fixedly connected with a swing rod 3. The swing power box 10 can be obtained by using the prior art, for example, a box body provided with a motor inside, the motor shaft of the motor serving as the output shaft of the swing power box 10. The swing rod 3 is provided with a vertical sliding cavity 31 at the lower end. The sliding cavity 31 is slidably connected with a supporting rod 32. The inner top surface of the sliding cavity 31 is fixedly connected with an extension rod 33. The extension rod 33 is an electric push rod, so that the supporting rod 32 can be lowered to a working height. When not in use, the supporting rod 32 is retracted. The supporting rod 32 and the extension rod 33 are fixedly connected with a supporting spring 34. The supporting rod 32 and the extension rod 33 are provided with a displacement sensor 35. The displacement sensor 35 is used to detect the distance change of the supporting rod 32 relative to the swing rod 3. The swing rod 3 is provided with an avoiding groove 36 at both sides.

[0027] The bottom of the supporting rod 32 is fixedly connected with a cylinder 5. The bottom of the cylinder 5 is in an open structure. The cylinder 5 is rotatably connected with a planer 51 inside. The lower end of the planer 51 extends to the outside of the open structure. Thus, when the planer 51 rotates, the floating slag can be cleaned. It should be noted that in practice, a motor can be installed on one side of the cylinder. The motor shaft of the motor is connected with a transmission shaft. The transmission shaft is arranged in the cylinder 5 and is fixedly connected with the planer 51. Thus, the planer 51 is driven to rotate by the motor, further improving the cleaning effect of the floating slag.

[0028] The supporting rod 32 is fixedly connected with a cross rod 4 at one side. The cross rod 4 is provided with a distance sensor 41 at the bottom in an interval. The cross rod 4 can be raised and lowered with the supporting rod 32. The avoiding groove 36 provides space for the cross rod 4 to be raised and lowered.

[0029] The distance sensor 41 is one of a laser distance sensor, an ultrasonic distance sensor or an infrared distance sensor. The distance sensor 41 monitors the distance from the surface of the poured concrete during the movement.

[0030] The supporting walking frame 1 is supported in the tunnel in an overhead manner. The floating slag in the groove between the adjacent steel frames is cleaned by the swing rod 3.

[0031] During the swing process of the swing rod 3, the supporting spring 34 presses the cylinder 5 tightly against the bottom of the groove. The invert base is cleaned as necessary during the swing. During this process, the cross rod 4 moves with the supporting rod 32. The surface of the filled concrete of the poured invert is taken as a reference for measurement. The relationship between the foundation before pouring and the surface of the concrete after pouring is detected, so as to ensure the consistency of pouring.

[0032] Example 2

[0033] AsFigs. 1-3 As shown, the horizontal rod 4 is provided with a sliding groove 42 at the bottom, and a sliding rod 43 is slidably connected in the sliding groove 42, in practice, protrusions can be provided on both sides of the sliding rod 43, and long limiting grooves are provided on the inner walls of both sides of the sliding groove 42, the protrusions are slidably connected in the long limiting grooves, so as to ensure the stability of the sliding rod 43, the distance sensor 41 is fixedly connected to the bottom of the sliding rod 43, the hook spring 44 is fixedly connected between one end of the sliding rod 43 and the inner wall of one end of the sliding groove 42, and the steel wire rope 45 is fixedly connected between the other end of the sliding rod 43 and the supporting rod 32 and passes above the horizontal rod 4, a guide wheel can be installed on the horizontal rod 4, and the steel wire rope 45 passes through the guide wheel, so as to improve the stability of the steel wire rope 45 during movement.

[0034] In the embodiment 2, since the arc of the inverted arch is greater than the tunnel diameter, when the swing rod 3 swings, the supporting rod 32 is retracted relative to the swing rod 3 when the swing rod 3 is in the middle, and the supporting rod 32 is stretched upward from the lower end of the swing rod 3 when the swing rod 3 swings close to the tunnel side wall, so as to realize the telescopic movement of the supporting rod 32 relative to the swing rod 3, and due to the telescopic movement of the supporting rod 32, the sliding rod 43 is slid in the sliding groove 42 to change the position through the traction of the steel wire rope 45, so as to realize the position change of the distance sensor 41. Fig. 2 As shown, the position measured by the distance sensor 41 is changed from A point to B point, and the detected position is changed in the direction of the tunnel, so as to avoid the detection error of the single position.

[0035] The application further discloses a flatness detection method for tunnel inverted arch concrete construction, which adopts the flatness detection device to detect the tunnel inverted arch concrete construction, and the specific detection method is as follows.

[0036] The whole flatness detection device is supported on the tunnel inner wall through the supporting walking frame 1, and the telescopic rod 33 is elongated so that the planer 51 contacts the cleaned dross;

[0037] The swing rod 3 is controlled to swing through the swing power box 10, the dross of the inverted arch base is cleaned through the swing of the swing rod 3, and the pouring consistency is ensured as much as possible.

[0038] Although the embodiments of the application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the flatness of concrete inverted arches in tunnels, characterized in that: The system includes a support walking frame (1) supported on both sides of the tunnel inner wall. One end of the support walking frame (1) is provided with a swing power box (10). The output shaft of the swing power box (10) is fixedly connected to a downwardly extending swing rod (3). The lower end of the swing rod (3) is provided with a vertical sliding cavity (31). A support rod (32) is slidably connected in the sliding cavity (31). A telescopic rod (33) is fixedly connected to the inner top surface of the sliding cavity (31). A support spring (34) is fixedly connected between the support rod (32) and the telescopic rod (33). A displacement sensor (35) is provided between the support rod (32) and the telescopic rod (33). A crossbar (4) is fixedly connected to one side of the support rod (32), and distance sensors (41) are spaced apart at the bottom of the crossbar (4); a sliding groove (42) is provided at the bottom of the crossbar (4), and a sliding rod (43) is slidably connected in the sliding groove (42). A distance sensor (41) is fixedly connected to the bottom of the sliding rod (43). A hook spring (44) is fixedly connected between the end of the sliding rod (43) near the support rod (32) and the inner wall of the sliding groove (42) near the support rod (32). A steel wire rope (45) passing over the top of the crossbar (4) is fixedly connected between the other end of the sliding rod (43) and the support rod (32). A clearance groove (36) is provided on both sides of the swing rod (3). The bottom of the support rod (32) is fixedly connected to a cylinder (5), the bottom of the cylinder (5) is open, and a planer (51) is rotatably connected inside the cylinder (5), with the lower end of the planer (51) extending outside the open structure.

2. The flatness testing device for tunnel invert concrete construction according to claim 1, characterized in that: The distance sensor (41) is a laser rangefinder, an ultrasonic rangefinder, or an infrared rangefinder.

3. The flatness testing device for tunnel invert concrete construction according to claim 1, characterized in that: The supporting walking frame (1) includes a control box (11), and hydraulic rods (12) are hinged to both sides of the control box (11). At least two rollers (13) supporting the inner wall of the tunnel are provided at the lower end of each hydraulic rod (12). The swing power box (10) is located at one end of the control box (11).

4. The flatness detection device for tunnel invert concrete construction according to claim 3, characterized in that: One end of the control box (11) is fixedly connected to a vertical plate (14), and a vertical groove (15) is provided in the vertical plate (14). A slider is slidably connected in the groove (15), and the swing power box (10) is fixedly connected to one side of the slider. A linear drive device connected to the slider is installed on the vertical plate (14), and the slider slides in the groove (15) driven by the linear drive device.

5. A method for detecting the flatness of concrete inverted arch construction in tunnels, characterized in that: The flatness testing device as described in any one of claims 1-4 is used to test the concrete construction of the tunnel invert arch. The specific testing method is as follows: The entire flatness detection device is supported on the inner wall of the tunnel by the support walking frame (1), and the telescopic rod (33) is extended so that the planer (51) comes into contact with the cleaned slag; The swing rod (3) is controlled by the swing power box (10) to swing, and the planer (51) cleans the scum on the invert base as the swing rod (3) swings.

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