Bridge pile foundation scouring safety monitoring device

Abstract

The utility model discloses a bridge pile foundation scouring safety monitoring device in the technical field of bridge monitoring. The bridge pile foundation scouring safety monitoring device comprises a clamping table, a lifting box, a positioning block, a waterproof camera, a monitoring sensor and an infrared distance meter. A pile foundation can be locked and hooped through the more stable clamping table and the clamping hoop cylinder, clamping is more stable, the lifting table is limited through the guide rod and the ball screw, it is ensured that lifting of the lifting table is stable and does not deflect, the more accurate lifting direction is provided for a detected arc plate and the lifting table, it is ensured that detection lifting is kept vertical, and the detection efficiency is improved. In this way, the infrared distance meter is kept vertical, the annular arc plate does not rotate or deflect, and the effectiveness of detection data is improved. The horizontal extension and retraction of the arc plate are more stable, the detection data are more accurate, and the scouring condition is monitored in real time through the waterproof camera and the infrared distance meter, so that the monitoring accuracy is ensured when the bridge pile foundation is flushed by river water, the operation is simple, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge monitoring, in particular to a bridge pile foundation scouring safety monitoring device. Background Art

[0002] Local scour of bridge piers is one of the important reasons for the damage of cross-sea bridges. Local scour is a natural phenomenon caused by the erosion of alluvial seabed water flow. Bridge foundation scour includes pier scour and pile scour. The resulting bridge damage often occurs. On-site monitoring of bridge foundation scour can simply and intuitively present the scour depth and provide reasonable suggestions for bridge managers to implement bridge foundation scour protection measures in a timely manner.

[0003] For example, the utility model patent application document with the Chinese patent authorization announcement number CN219219139U discloses a bridge pile foundation scour safety monitoring device, including: a monitoring system mounting ring, a monitoring system, and a monitoring ring frame. Two sets of monitoring system mounting rings are connected to the upper side of the bridge pile foundation through a bolt frame and a fastening bolt, and a lead screw is selected according to the depth of the river water. The positioning block is installed on the lower side of the bridge pile foundation through a fixed structure or the positioning block is fixed to the bottom of the river water to keep the lead screw stable, and the servo motor is controlled to drive the lead screw to rotate, and then the nut is driven to rise and fall along the lead screw. Under the action of the electric telescopic rod, the monitoring ring frame is controlled to move toward the bridge pile foundation, and then the river water around the bridge pile foundation and the bridge device itself are monitored in real time through sensors. The pneumatic slide drive device drives the arc electric slide rail to run, driving the sensor to take real-time photos of the changes in the bridge pile foundation and the river water, and the infrared rangefinder is controlled to monitor the depth changes of the silt in the river water under the bridge device, so as to monitor various safety values ​​of the bridge pile foundation when it is scoured by the river water.

[0004] In view of the above-mentioned related technologies, the device is provided with a screw and a nut, and when the servo motor is controlled to drive the screw to rotate, the ring frame on which the monitoring device is installed is easily deflected due to the rotation of the screw, and may also be tilted due to the impact of water flow; the deflection causes a large detection error during bottom infrared ranging, and the sensor on the inner side that detects the pile foundation has a rotational deflection of the hoop, and when the monitoring ring frame moves toward the bridge pile foundation, it will collide with it, and the detection sensor cannot be aligned with the pile foundation, resulting in detection failure.

[0005] Based on this, the utility model designs a bridge pile foundation scour safety monitoring device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a bridge pile foundation scour safety monitoring device, which can lock the pile foundation through a more stable clamping platform and a clamping hoop, so that the clamping is more stable, and then the lifting platform is limited by a guide rod and a ball screw to ensure that the lifting is stable and will not deflect, and provide a more accurate lifting direction for the detected arc plate and the lifting platform, so as to ensure that the detection lifting remains vertical, so that the infrared rangefinder remains vertical, and the annular arc plate will not rotate and deflect, thereby improving the validity of the detection data; and the lifting hanging plate provides horizontal support and limitation for the electric telescopic rod, so that the horizontal extension and retraction of the arc plate is more stable and the detection data is more accurate.

[0007] The utility model is implemented as follows: a bridge pile foundation scour safety monitoring device, comprising:

[0008] Clamping table, lifting box, positioning block, waterproof camera, monitoring sensor and infrared rangefinder;

[0009] The clamping platform is an installation platform, the inner side of the clamping platform is an arc surface, a clamping hoop is fixed on the top of the clamping platform, the clamping hoop is a semicircular sheet-shaped clamp, and two detachable butt clamps of the clamping hoop are locked; two detachable facing clamps of the clamping platform are locked on the outer wall of the pile foundation;

[0010] The lifting box is a closed box with a hollow interior, a ball screw is axially rotatable inside the lifting box, an explosion-proof motor is stably installed on the top of the clamping table, the upper end of the ball screw is connected to the output shaft of the explosion-proof motor, and a lifting platform is also arranged on the ball screw, and the lifting platform is mounted on the ball screw through a threaded manner so as to be able to be lifted and lowered;

[0011] A lifting plate is provided on the top of the positioning block, the upper end of the lifting plate is locked on the lifting platform, and the lower end of the lifting plate passes through the bottom plate of the lifting box and is locked on the top of the positioning block;

[0012] An electric telescopic rod is also arranged on the vertical side wall of the lifting hanging plate, and the telescopic end of the electric telescopic rod passes through the lifting hanging plate and extends into the inner side wall thereof, and the telescopic end of the electric telescopic rod is arranged horizontally inwards;

[0013] An arc plate is arranged at the inner end of the electric telescopic rod, the inner side of the arc plate is an arc surface, the arc plate can be detachably attached to the outer wall of the pile foundation, a monitoring sensor is arranged on the inner side wall of the arc plate, an infrared rangefinder is also arranged on the outer side of the arc plate, and the detection direction of the infrared rangefinder is vertically downward;

[0014] The waterproof camera is arranged outside the positioning block, and the shooting direction of the waterproof camera is vertically downward.

[0015] Furthermore, a guide rod is vertically arranged inside the lifting box, and the guide rod is a smooth round rod, and the upper and lower ends of the guide rod are respectively locked with the top and bottom of the inner cavity of the lifting box, and the lifting platform can be vertically slidably mounted on the guide rod;

[0016] There are two guide rods, and the two guide rods are fixedly mounted in parallel on both sides of the ball screw;

[0017] The upper and lower ends of the ball screw are rotatably installed in the inner cavity of the lifting box through bearings.

[0018] Furthermore, there is a horizontal horizontal plate on the top of the lifting hanging plate, the lifting hanging plate and the top horizontal plate form an L-shaped structure, and the top horizontal plate of the lifting hanging plate is fixed to the vertical inner wall of the lifting platform;

[0019] The lifting plate is vertically arranged inside the lifting box, and the lower end of the lifting plate passes through the bottom plate of the lifting box and vertically extends below it. The lifting plate and the through-holes of the bottom plate of the lifting box are clearance-matched, and the clearance does not exceed 1 mm;

[0020] A plurality of positioning pins are also arranged at the bottom of the positioning block.

[0021] Furthermore, the arc plate is arranged on the inner side of the lifting hanging plate, the arc surface of the arc plate is arranged inward, and the arc surface centers of the two arc plates coincide;

[0022] A placement block is also provided at the bottom of the arc plate, and the placement block extends out of the lifting hanging plate, and the lifting hanging plate does not contact the arc plate and the placement block;

[0023] The infrared rangefinder is arranged at the bottom of the placement block, and the infrared rangefinder is located outside the lifting hanging plate;

[0024] The infrared rangefinder and the waterproof camera do not block each other.

[0025] Furthermore, locking ear plates extend outward from both sides of the clamping hoop, and the locking ear plates on the two relatively clamped clamping hoop are locked by a locking screw;

[0026] The inner side walls of the clamping hoop and the lifting box are also covered with anti-skid rubber pads;

[0027] The inner wall of the clamping hoop and the lifting box are on the same vertical arc surface.

[0028] The beneficial effects of the utility model are as follows: 1. The utility model sets the ball screw in a closed lifting box, so that the lifting of the lifting platform is not affected by the water flow, ensuring its lifting stability, and the cooperation of the guide rod and the ball screw makes the lifting platform maintain vertical lifting, so that the lifting of the device is more stable, the direction is more accurate, and no deflection occurs, thereby ensuring that the infrared rangefinder accurately measures the distance to the bottom of the water, and the situation that one side is higher than the other side will not occur;

[0029] 2. The upper end of the lifting plate of the device is inserted into the lifting box, and the lifting plate is guided and limited by the bottom plate of the lifting box, so that the lifting plate is kept vertical, ensuring the stability of the lifting direction of the positioning block. The device has better stability and can ensure that the waterproof camera can detect the direction accurately, and the shooting angle is facing the underwater environment around the pile foundation, ensuring that the shooting picture is effective;

[0030] 3. The electric telescopic rod of the device controls the extension and retraction of the arc plate, and it is necessary to align the monitoring sensor with the pile foundation for effective detection. The electric telescopic rod of the device passes through the lifting hanging plate, and the extension and retraction direction of the electric telescopic rod is limited by the lifting hanging plate to ensure that the extension end will not be deflected and increase its extension stability, so that the arc plate where the monitoring sensor is located can be fitted with the arc surface of the outer wall of the pile foundation for detection, the extension and retraction direction is accurate, and the detection position is more accurate and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the structure of the utility model clamp locked on the outside of the pile foundation;

[0033] Figure 2 This is a schematic diagram of the utility model locked on the front structure of the pile foundation;

[0034] Figure 3 This is a schematic diagram of the bottom structure of the utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of a single lifting box of the utility model;

[0036] Figure 5 It is a schematic diagram of the overall structure of the utility model itself;

[0037] Figure 6 It is an enlarged schematic diagram of the structure of part A of the utility model.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1- clamping table, 11- clamping hoop, 12- locking ear plate, 13- locking screw, 2- lifting box, 21- ball screw, 22- guide rod, 23- lifting table, 24- explosion-proof motor, 3- positioning block, 31- electric telescopic rod, 32- positioning nail, 33- lifting hanging plate, 4- waterproof camera, 41- monitoring sensor, 42- infrared rangefinder, 43- arc plate, 44- placement block, 5- non-slip rubber pad. DETAILED DESCRIPTION

[0040] See also Figures 1 to 6 As shown, the utility model provides a bridge pile foundation scour safety monitoring device. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings in the specification and specific implementation methods.

[0041] In a specific embodiment of the technical solution of the utility model:

[0042] It includes a clamping platform 1, a lifting box 2, a positioning block 3, a waterproof camera 4, a monitoring sensor 41 and an infrared rangefinder 42;

[0043] The clamping platform 1 is an installation platform, the inner side of the clamping platform 1 is an arc surface, and a clamping hoop 11 is fixed on the top of the clamping platform 1. The clamping hoop 11 is a semicircular sheet-shaped clamp, and two detachable butt clamps of the clamping hoop 11 are locked; the detachable opposing clamps of the two clamping platforms 1 are locked on the outer wall of the pile foundation; both sides of the clamping hoop 11 extend outwardly with locking ear plates 12, and the locking ear plates 12 on the two relatively clamped clamping hoop 11 are locked by a locking screw 13;

[0044] The inner side walls of the clamping hoop 11 and the lifting box 2 are also covered with anti-skid rubber pads 5;

[0045] The inner wall of the clamping hoop 11 and the lifting box 2 are on the same vertical arc surface. Stable clamping is ensured, and the clamping effect is better and the clamping is more stable by clamping the clamping hoop 11 and the lifting box 2 together.

[0046] The lifting box 2 is a closed box with a hollow interior. A ball screw 21 is arranged inside the lifting box 2 so as to be axially rotatable. An explosion-proof motor 24 is stably installed on the top of the clamping table 1. The upper end of the ball screw 21 extends out of the top of the lifting box 2 and is connected to the output shaft of the explosion-proof motor 24. The ball screw 21 is rotated by the explosion-proof motor 24 and rotates along the vertical axis. The upper and lower ends of the ball screw 21 are rotatably installed in the inner cavity of the lifting box 2 through bearings, that is, bearings are arranged on the top and bottom of the lifting box 2 for docking and locking with the ball screw 21.

[0047] A lifting platform 23 is also provided on the ball screw 21. The lifting platform 23 is mounted on the ball screw 21 through a thread and can be raised and lowered. The lifting platform 23 does not contact the inner wall of the lifting box 2 to avoid mutual interference and affecting the lifting. A guide rod 22 is also vertically provided inside the lifting box 2. The guide rod 22 is a smooth round rod. The upper and lower ends of the guide rod 22 are respectively locked with the top and bottom of the inner cavity of the lifting box 2. The lifting platform 23 can be vertically slidably mounted on the guide rod 22. There are two guide rods 22, and the two guide rods 22 are fixedly mounted on both sides of the ball screw 21 in parallel.

[0048] A lifting plate 33 is provided on the top of the positioning block 3, the upper end of the lifting plate 33 is locked on the lifting platform 23, and the lower end of the lifting plate 33 passes through the bottom plate of the lifting box 2 and is locked on the top of the positioning block 3; the lifting plate 33 and the positioning block 3 do not contact the pile foundation to avoid being stuck during the lifting process.

[0049] An electric telescopic rod 31 is also provided on the vertical side wall of the lifting hanging plate 33. The telescopic end of the electric telescopic rod 31 passes through the lifting hanging plate 33 and extends into the inner side wall thereof. The telescopic end of the electric telescopic rod 31 is arranged horizontally inwardly. The mounting between the telescopic end of the electric telescopic rod 31 and the lifting hanging plate 33 needs to be horizontal and stable.

[0050] There is a horizontal horizontal plate on the top of the lifting hanging plate 33, and the lifting hanging plate 33 and the top horizontal plate form an L-shaped structure. The top horizontal plate of the lifting hanging plate 33 is fixed to the vertical inner wall of the lifting platform 23;

[0051] The lifting plate 33 is vertically arranged inside the lifting box 2, and the lower end of the lifting plate 33 passes through the bottom plate of the lifting box 2 and extends vertically thereunder. The lifting plate 33 and the through-holes in the bottom plate of the lifting box 2 are clearance-matched, and the clearance does not exceed 1 mm; to ensure the lifting stability of the lifting plate 33, the telescopic direction of the lifting plate 33 is limited by the bottom plate of the lifting box 2 to avoid deflection due to water flow or rotation.

[0052] A plurality of positioning pins 32 are also provided at the bottom of the positioning block 3, and the positioning pins 32 can be nailed into the bottom of the river for positioning, so that both the upper and lower ends of the lifting hanging plate 33 are stable, ensuring its stability when inserted in the water flow, and providing more stable support for the electric telescopic rod 31.

[0053] An arc plate 43 is provided at the inner end of the electric telescopic rod 31, the inner side of the arc plate 43 is an arc surface, the arc plate 43 can be detachably attached to the outer wall of the pile foundation, a monitoring sensor 41 is provided on the inner side wall of the arc plate 43, and an infrared rangefinder 42 is also provided on the outer side of the arc plate 43, and the detection direction of the infrared rangefinder 42 is vertically downward;

[0054] The waterproof camera 4 is arranged outside the positioning block 3, and the shooting direction of the waterproof camera 4 is vertically downward. The arc plate 43 is arranged inside the lifting hanging plate 33, and the arc surface of the arc plate 43 is arranged inward, and the arc surfaces of the two arc plates 43 coincide with each other;

[0055] A placement block 44 is also provided at the bottom of the arc plate 43. The placement block 44 extends outward from the lifting hanging plate 33. The lifting hanging plate 33 does not contact the arc plate 43 and the placement block 44.

[0056] The infrared rangefinder 42 is arranged at the bottom of the placement block 44, and the infrared rangefinder 42 is located outside the lifting hanging plate 33; the infrared rangefinder 42 and the waterproof camera 4 do not block each other, ensuring the effectiveness of the detection.

[0057] Compared with the existing technology, the structure of the embodiment of the utility model has the following differences:

[0058] 1. When the lead screw rotates, a rotational force is generated. During a test, the upper annular hoop needs to hold the pile foundation or the pile foundation, and the lower end needs to go deeper before the detection sensor is controlled to extend and align the pile foundation with the limit position for detection. The existing device has an unstable extension direction. When the lead screw rotates and retracts, it is easy to deflect due to the torsional force, resulting in a twist in the extension direction of the detection sensor, resulting in inaccurate detection of the object and failure of the detection. The device limits the lifting direction of the lifting platform 23 through the guide rod 22 to ensure the accuracy of the lifting direction and to keep the lifting process stable. 2. Because it is difficult for the lead screw to maintain vertical extension in a strong water flow, especially during the rotation process, the device adds a lifting box 2 to effectively avoid The lifting platform 23 is impacted by the water flow, so that it can be lifted and lowered in a stable environment, effectively maintaining stable lifting; 3. When the telescopic rods of the existing detection device are extended and retracted in opposite directions, only a single telescopic rod is extended and retracted, especially when extended, it is easy to be deflected by the impact of the rapids in the slit, resulting in the detection not being aligned with the pile foundation, resulting in inaccurate or failed detection. The telescopic end of the electric telescopic rod 31 of the device is limited horizontally by the lifting hanging plate 33 to ensure the accuracy of the extension direction, and only an arc plate is extended. The existing device is extended and retracted, not only the telescopic rod is installed on the screw, but also follows the lifting, which makes it easy to loosen the connection, and then after the lifting operation, horizontal extension and extension and water flow impact, it is easy to deflect. The stability of the device is higher.

[0059] Fiber Bragg grating temperature sensor, fiber Bragg grating seepage pressure sensor, fiber Bragg grating pressure sensor, flow velocity sensor and fiber Bragg grating acceleration sensor; fiber Bragg grating seepage pressure sensor is used to monitor the water pressure change caused by water level fluctuation in real time; fiber Bragg grating pressure sensor is responsible for real-time monitoring of the changes in external water pressure and soil pressure; fiber Bragg grating temperature sensor is used to make temperature compensation for fiber Bragg grating sensor; flow velocity sensor is used to monitor the flow velocity change at the monitoring point; fiber Bragg grating acceleration sensor is used to monitor the vibration response of the pile. The above sensors can be used to monitor various data of the bridge pile foundation in real time.

[0060] The controller and monitoring sensor 41, waterproof camera 4, infrared rangefinder 42, explosion-proof motor 24, and electric telescopic rod 31 are all waterproofed and can be wrapped with a rubber sleeve or connected with a waterproof wire. The camera and motor themselves are waterproof devices, and the electric telescopic rod 31 only needs to be waterproofed to ensure that each lifting and telescopic component can operate normally underwater.

[0061] When the utility model is in use, the two clamping platforms 1 are locked on the arc-shaped outer wall of the pile foundation by the opposing clamping hoops, and then the two locking ear plates 12 are aligned and locked by the locking screw 13 and the nut.

[0062] When locking, ensure that the locking is firm. At this time, the inner curved surface of the lifting box 2 will also be locked with the pile foundation clamp, and the inner anti-skid rubber pad 5 can play a role in buffering and locking and anti-skid, and the locking effect is better.

[0063] The explosion-proof motor 24 is then started, and the clamping platform 1 is above the water surface. The explosion-proof motor 24 will only encounter water splashing, but will not be soaked, and its operation is not easily obstructed; the ball screw 21 is driven by the explosion-proof motor 24 to rotate, and at this time the position of the lifting platform 23 is limited by the guide rod 22 and cannot follow the rotation, while some existing devices rely on the annular hoop that clamps the pile foundation to limit the position and does not rotate, and the limiting effect is poor and it is easy to follow the rotation. The lifting platform 23 of the present device is inside the lifting box 2 and will not be impacted by the torrent, and the lifting is stable. The lifting hanging plate 33 is controlled to extend downward, so that the positioning nail 32 is nailed into the bottom of the water for anchoring, and then the electric telescopic rod 31 is controlled to extend, and the arc plate 43 is extended toward the pile foundation, so that the monitoring sensor 41 is horizontally aligned with the pile foundation, and the pile foundation is effectively detected by the monitoring sensor 41.

[0064] At the same time, the waterproof camera 4 captures the changes of the bridge pile foundation and the river water in real time, and the infrared rangefinder 42 detects the distance to the bottom of the water to determine the scouring depth of the riverbed, so as to monitor various safety values ​​of the bridge pile foundation when it is scoured by the river water.

[0065] The inner side of the device refers to the side facing the center of the pile foundation.

[0066] In addition, in the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0067] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A bridge pile foundation scour safety monitoring device, characterized in that: include: A clamping platform (1), a lifting box (2), a positioning block (3), a waterproof camera (4), a monitoring sensor (41) and an infrared rangefinder (42); The clamping platform (1) is a mounting platform, the inner side of the clamping platform (1) is a curved surface, a clamping hoop tube (11) is fixedly arranged on the top of the clamping platform (1), the clamping hoop tube (11) is a semicircular sheet-shaped clamping hoop, and two detachable butt-jointed clamping hoops (11) are locked; two detachable facing clamping hoops of the clamping platforms (1) are locked on the outer wall of the pile foundation; The lifting box (2) is a closed box with a hollow interior. A ball screw (21) is arranged inside the lifting box (2) so as to be axially rotatable. An explosion-proof motor (24) is stably installed on the top of the clamping platform (1). The upper end of the ball screw (21) is connected to the output shaft of the explosion-proof motor (24). A lifting platform (23) is also arranged on the ball screw (21). The lifting platform (23) is mounted on the ball screw (21) so as to be liftable by means of a thread. A lifting plate (33) is provided on the top of the positioning block (3), the upper end of the lifting plate (33) is locked on the lifting platform (23), and the lower end of the lifting plate (33) passes through the bottom plate of the lifting box (2) and is locked on the top of the positioning block (3); An electric telescopic rod (31) is also arranged on the vertical side wall of the lifting hanging plate (33), and the telescopic end of the electric telescopic rod (31) passes through the lifting hanging plate (33) and extends into the inner side wall thereof, and the telescopic end of the electric telescopic rod (31) is arranged horizontally inwards; An arc plate (43) is arranged at the inner end of the electric telescopic rod (31), the inner side of the arc plate (43) is an arc surface, the arc plate (43) can be detachably attached to the outer wall of the pile foundation, a monitoring sensor (41) is arranged on the inner side wall of the arc plate (43), and an infrared rangefinder (42) is also arranged on the outer side of the arc plate (43), and the detection direction of the infrared rangefinder (42) is vertically downward; The waterproof camera (4) is arranged outside the positioning block (3), and the shooting direction of the waterproof camera (4) is vertically downward.

2. A bridge pile foundation scour safety monitoring device according to claim 1, characterized in that: A guide rod (22) is also vertically arranged inside the lifting box (2), and the guide rod (22) is a smooth round rod. The upper and lower ends of the guide rod (22) are respectively locked with the top and bottom of the inner cavity of the lifting box (2), and the lifting platform (23) can be vertically slidably mounted on the guide rod (22); There are two guide rods (22), and the two guide rods (22) are fixedly mounted in parallel on both sides of the ball screw (21); The upper and lower ends of the ball screw (21) are rotatably mounted in the inner cavity of the lifting box (2) via bearings.

3. A bridge pile foundation scour safety monitoring device according to claim 1, characterized in that: The top of the lifting hanging plate (33) is provided with a horizontal horizontal plate, the lifting hanging plate (33) and the top horizontal plate form an L-shaped structure, and the top horizontal plate of the lifting hanging plate (33) is fixedly arranged on the vertical inner side wall of the lifting platform (23); The lifting plate (33) is vertically arranged inside the lifting box (2), and the lower end of the lifting plate (33) passes through the bottom plate of the lifting box (2) and vertically extends below it. The lifting plate (33) and the through-holes of the bottom plate of the lifting box (2) are clearance-matched, and the clearance does not exceed 1 mm. A plurality of positioning pins (32) are also provided at the bottom of the positioning block (3).

4. A bridge pile foundation scour safety monitoring device according to claim 1, characterized in that: The arc plate (43) is arranged on the inner side of the lifting hanging plate (33), the arc surface of the arc plate (43) is arranged inwardly, and the arc surface centers of the two arc plates (43) coincide with each other; A placement block (44) is also provided at the bottom of the arc plate (43), and the placement block (44) extends outward from the lifting hanging plate (33), and the lifting hanging plate (33) is not in contact with the arc plate (43) and the placement block (44); The infrared rangefinder (42) is arranged at the bottom of the placement block (44), and the infrared rangefinder (42) is located outside the lifting hanging plate (33); The infrared rangefinder (42) and the waterproof camera (4) do not block each other.

5. A bridge pile foundation scour safety monitoring device according to claim 1, characterized in that: Locking ear plates (12) extend outwardly from both sides of the clamping hoop (11), and the locking ear plates (12) on the two relatively clamped clamping hoop tubes (11) are locked by a locking screw (13); The inner side walls of the clamping hoop (11) and the lifting box (2) are also covered with anti-slip rubber pads (5); The inner wall of the clamping hoop (11) and the lifting box (2) are on the same vertical arc surface.

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