Ultrasonic detection equipment and method for accumulated water in U shape of bridge deck slab

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By designing an ultrasonic detection device for water accumulation in the U-shaped bridge deck, using ultrasonic and electromagnetic adsorption technology, the problem of existing detection methods causing damage to the bridge deck is solved, and a fast and accurate detection effect is achieved.

CN119412599APending Publication Date: 2025-02-11BAOJI JISHI METAL DETECTION CO LTD +1

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Patent Information

Application Number: CN202411541175.3
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-10-31
Publication Date: 2025-02-11

AI Technical Summary

Technical Problem

Whether there is water accumulation detection method inside the existing bridge requires drilling holes on the bridge deck, resulting in inaccurate positioning and damage to the bridge deck, affecting normal repair operations.

Method used

An ultrasonic detection device with water accumulation in the U-shaped bridge panel is designed, and a combination of a base, a deployed push rod, a moving seat, an electromagnetic plate and an ultrasonic assembly is achieved without destruction. The equipment avoids drilling operations by adsorbing U ribs and using ultrasonic waves to identify the water accumulation.

Benefits of technology

It realizes rapid and accurate detection of water accumulation in the U-shaped bridge deck, avoids damage to the bridge deck, and improves the safety and efficiency of inspection.

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Abstract

The invention provides an ultrasonic detection device and method for accumulated water in a U shape of a bridge deck slab, and relates to the field of in-service steel bridge detection, the outer side of a controller is fixedly connected with a guide block, and the problem that corresponding holes need to be drilled in the bridge deck to judge whether the accumulated water exists in an existing bridge or not is solved. The problems that in the prior art, in the prior art, in the prior art, due to the fact that positioning is not accurate due to frequent drilling operation, a bridge floor is seriously broken and damaged, normal repairing operation of the bridge floor is affected, and limitation exists are solved, and a stepping push rod installed in a guide rail is started to push a stepping seat; the stepping seat moves to drive the whole device to perform short-distance displacement, after the short-distance displacement is completed, the other set of electromagnetic plates are started to perform adsorption positioning, the stepping push rod in the first step is restarted to unfold the electromagnetic plates towards the outer side, and stepping operation of the device is achieved by repeating the steps. And thus, the purpose of more comprehensive coverage detection is achieved.

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Description

Technical Field

[0001] The invention belongs to the field of in-service steel bridge detection, and particularly relates to an ultrasonic detection device and method for water accumulation in a U-shaped bridge deck. Background Art

[0002] Orthotropic steel bridge decks are directly subjected to repeated wheel pressure. Under the action of alternating stress, the steel bridge deck will suffer fatigue damage, and some cracks will penetrate the bridge deck. When encountering rainy and snowy weather, water will leak into the U-rib cavity of the bridge deck along the cracks, causing serious impact on the safety of the bridge. Knowing whether there is water accumulation in the U-rib cavity in time can timely discover steel bridge diseases, repair and maintain the steel bridge, and avoid accidents.

[0003] However, in order to determine whether there is water accumulation inside existing bridges, corresponding holes need to be drilled on the bridge deck to determine whether there is water accumulation. However, frequent drilling operations may lead to inaccurate positioning and cause significant damage to the bridge deck, which in turn may affect the normal repair work of the bridge deck.

[0004] Therefore, in view of the defects in the actual production and implementation of the above-mentioned scheme, it has been revised and improved. At the same time, in the spirit and concept of seeking improvement, with the assistance of professional knowledge and experience, and after many ingenuity and experiments, the present invention was created. A special ultrasonic detection equipment and method for water accumulation in a U-shaped bridge deck are provided to solve the problem of whether there is water accumulation inside the existing bridge. It is necessary to drill corresponding holes on the bridge deck to determine whether there is water accumulation. However, frequent drilling operations will lead to inaccurate positioning and cause greater damage to the bridge deck, which will further affect the normal repair work of the bridge deck, and there are limitations. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide an ultrasonic detection device and method for water accumulation inside a U-shaped bridge deck, which solves the problem that whether there is water accumulation inside the existing bridge requires drilling corresponding holes on the bridge deck to determine whether there is water accumulation. However, frequent drilling operations may lead to inaccurate positioning and cause significant damage to the bridge deck, which in turn may affect the normal repair work of the bridge deck, and there are limitations.

[0006] According to a first aspect of an embodiment of the present disclosure, there is provided an ultrasonic detection device for water accumulation in a U-shaped bridge deck, comprising a base, a partition A is fixedly connected to the outer side of the base, and an expansion push rod is fixedly connected to the outer side of the partition A, and a moving seat is fixedly connected to the outer side of the expansion push rod, a sliding block is fixedly connected to the outer side of the moving seat, and a connecting frame is also fixedly connected to the outer side of the moving seat, and a supporting frame is fixedly connected to the outer side of the connecting frame, a side plate is fixedly connected to the inner side of a longitudinal member in the supporting frame, a motor is installed on the outer side of the side plate, and a guide rail is installed on the output shaft of the motor, and a partition B is fixedly connected to the inside of the guide rail, and a stepping push rod is fixedly connected to the outer side of the partition B, and the stepping push rod is fixedly connected to the outer side of the stepping push rod. A stepping seat is installed on the output end of the rod, and a card block is fixedly connected to the outer side of the stepping seat, and an electromagnetic plate is fixedly connected to the inner side of the stepping seat, and a groove is opened on the top of the base, and a lighting lamp and a shooting component are fixedly connected inside the groove, and a guide frame is fixedly connected to the bottom end surface of the base, and a lifting push rod is fixedly connected inside the guide frame, and a controller is installed on the top of the lifting push rod, and a guide block is fixedly connected to the outer side of the controller, and an ultrasonic component is fixedly connected to the top surface of the controller, and a processor is installed on the bottom end surface of the base, and a wire is fixedly connected to the outer side of the processor, and a U-rib is installed on the top of the base, and a panel and a bridge deck are installed on the top of the U-rib.

[0007] As a preferred embodiment, the main body of the base is a rectangular block structure, and the partition A is provided at two locations, the two partitions A are fixedly connected oppositely in transverse grooves opened in the front and rear side surfaces of the base, and the expansion push rod is provided at four locations, wherein every two transversely adjacent expansion push rods form a group.

[0008] As a preferred embodiment, the two groups of the deployment push rods are fixedly connected oppositely to the left and right side surfaces of the two partitions A, and the outer side of each movable seat is fixedly connected oppositely to two sliders, and the movable seat is slidably connected to the transverse groove opened on the outer side of the base through the sliders fixedly connected on its outer side surface.

[0009] As a preferred embodiment, the connecting frame and the supporting frame together form an L-shaped supporting structure, and the side panels and the outer side surfaces of the supporting frame are vertically arranged, and the side panels are provided at four locations, wherein every two longitudinally adjacent side panels form a group, and the two groups of side panels are fixedly connected in opposite directions to the inner sides of the two supporting frames, and the side panels and the supporting frame together form a supporting structure for supporting the guide rails.

[0010] As a preferred embodiment, the lighting lamp is a ring-shaped LED structure, and the shooting component is a CCD lens, and is electrically connected to the processor fixedly connected to the bottom end surface of the base, and image transmission is performed through the processor and the wire, and the connecting frame is provided at four locations, wherein every two longitudinally adjacent connecting frames form a group.

[0011] As a preferred embodiment, the two groups of connecting frames are fixedly connected to the supporting frame on one side away from the base, and the supporting frame and the connecting frame together constitute a clamping and positioning structure for clamping the U rib, and the panel is a steel plate structure, and the bridge deck is a concrete structure.

[0012] As a preferred embodiment, the stepping seat, the clamping block and the electromagnetic plate together constitute an adsorption limiting structure for adsorbing the U rib, and when the electromagnetic plate is in a energized magnetic state, the electromagnetic plate can adsorb the outer wall of the U rib.

[0013] According to a second aspect of an embodiment of the present disclosure, there is provided an ultrasonic detection method for water accumulation in a U-shaped bridge deck, which is applicable to the ultrasonic detection device for water accumulation in a U-shaped bridge deck. The ultrasonic detection method for water accumulation in a U-shaped bridge deck comprises the following steps:

[0014] 1) By placing the base under the U-rib and activating the deployment push rod installed on the outside of the partition A to push the movable base outward or pull it inward, and when the movable base is deployed outward, the slider is used to move along the transverse groove opened on the outside of the base, so that the electromagnetic plate is close to the outer wall of the U-rib, and the electromagnetic plate is energized to generate magnetism, so that the electromagnetic plate adsorbs the U-rib;

[0015] 2) After the adsorption positioning is completed, the wire arranged outside the processor is connected to the external display screen, and the bottom end surface of the U rib is illuminated by starting the lighting lamp installed on the top of the base to judge whether the U rib has surface damage and cracks, and when judging the water accumulation in the U rib, the controller is pushed upward by starting the lifting push rod installed in the guide frame;

[0016] 3) When the controller moves upward, the guide block fixedly connected to the outside of the controller is moved upward along the longitudinal groove of the guide frame until the ultrasonic component is tightly fitted with the outer wall of the U rib, and then the ultrasonic component is started to identify and judge the water accumulation in the U rib.

[0017] As a preferred implementation, when measuring the water accumulation in the U-rib, the following determination conditions are included:

[0018] When there is no water accumulation in the U rib:

[0019] When the longitudinal wave is incident vertically on the steel-air interface, only the reflection signal of the steel-air interface is displayed on the display screen of the ultrasonic instrument. According to the reflection signal of the steel-air interface, it is judged that there is no water accumulation in the U rib;

[0020] When water accumulates in the U-rib:

[0021] The longitudinal wave is incident vertically on the steel, water and air in turn, and the reflection signal of the water-air interface is displayed on the display screen of the ultrasonic instrument. According to the reflection signal of the water-air interface, it is determined that there is water accumulation in the U rib;

[0022] Observe the maximum reflection signal of the water-air interface displayed on the ultrasonic instrument display screen, adjust the gain so that the wave height reaches the curve height, and then read the depth value displayed on the A-type ultrasonic digital flaw detector, which is the water level value of the water accumulated in the U rib;

[0023] Based on the sound speed in steel being 5900m / S and the sound speed in water being 1480m / S, the position data of the reflected wave at the water-air interface is calculated and displayed by an ultrasonic instrument;

[0024] When the U-rib is filled with water:

[0025] The longitudinal wave is incident vertically on steel, water, steel and air in sequence. The reflected signal of the interface between steel and air is displayed on the display screen of the ultrasonic instrument. According to the sound path position parameters of the reflected signal of the interface between steel and air, it is determined that the U rib is full of water.

[0026] The technical solution provided by the present disclosure may have the following beneficial effects:

[0027] 1. In the embodiment of the present disclosure, an electromagnetic plate fixedly connected to the outside of the stepping seat is provided, so that when the base is installed to the outer position of the U rib, if the current device needs to be displaced to achieve all-round detection of the U rib, a group of longitudinally adjacent electromagnetic plates can be pre-started to generate magnetism, and the stepping push rod installed in the guide rail can be started to push the stepping seat, and the movement of the stepping seat can drive the entire device to move a short distance. After the short-distance displacement is completed, another group of electromagnetic plates are started for adsorption and positioning, and the electromagnetic plates are expanded to the outside by restarting the stepping push rod in the first step, and the stepping operation of the device is achieved by repeating this process, thereby achieving a more comprehensive coverage detection purpose.

[0028] 2. In the embodiment of the present disclosure, a lifting push rod, a controller and an ultrasonic component are fixedly connected to the guide frame, so that when it is necessary to detect the water accumulation inside the U-rib, the lifting push rod installed in the guide frame can be started to push the controller and the ultrasonic component upward, and the ultrasonic component can be moved upward to make the ultrasonic component fit tightly with the outer wall of the U-rib, thereby realizing a non-destructive rapid detection structure and achieving a more practical purpose. 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a schematic diagram of the front and side structure of the ultrasonic detection device of the present invention;

[0031] Figure 2 It is a schematic diagram of the combined structure of the base and the guide frame of the ultrasonic detection equipment of the present invention;

[0032] Figure 3 It is a front structural schematic diagram of the ultrasonic detection device of the present invention;

[0033] Figure 4 It is a schematic diagram of the combined structure of the connecting frame and the supporting frame of the ultrasonic detection equipment of the present invention;

[0034] Figure 5 It is a schematic diagram of the top view of the structure of the ultrasonic detection device of the present invention;

[0035] Figure 6 It is a left-side structural schematic diagram of the ultrasonic detection device of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the ultrasonic detection device of the present invention viewed from above;

[0037] Figure 8 The ultrasonic testing device of the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0038] In the figure, 1, base; 2, partition A; 3, unfolding push rod; 4, moving seat; 5, slider; 6, connecting frame; 7, supporting frame; 8, side plate; 9, motor; 10, guide rail; 11, partition B; 12, stepping push rod; 13, stepping seat; 14, clamping block; 15, electromagnetic plate; 16, lighting lamp; 17, shooting component; 18, guide frame; 19, lifting push rod; 20, controller; 21, guide block; 22, ultrasonic component; 23, processor; 24, wire; 25, U rib; 26, panel; 27, bridge deck. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figure 1-Figure 8 As shown, an ultrasonic detection device and method for water accumulation in a U-shaped bridge deck comprises: a base 1, a partition A2 is fixedly connected to the outer side of the base 1, and an expansion push rod 3 is fixedly connected to the outer side of the partition A2, and a moving seat 4 is fixedly connected to the outer side of the expansion push rod 3, a slider 5 is fixedly connected to the outer side of the moving seat 4, and a connecting frame 6 is also fixedly connected to the outer side of the moving seat 4, and a support frame 7 is fixedly connected to the outer side of the connecting frame 6, a side plate 8 is fixedly connected to the inner side of the longitudinal member of the support frame 7, a motor 9 is installed on the outer side of the side plate 8, and a guide rail 10 is installed on the output shaft of the motor 9, and a partition B11 is fixedly connected to the inside of the guide rail 10, and a stepping push rod 12 is fixedly connected to the outer side of the partition B11, and a stepping seat 13 is installed on the output end of the stepping push rod 12. , and a card block 14 is fixedly connected to the outer side of the stepping seat 13, and an electromagnetic plate 15 is fixedly connected to the inner side of the stepping seat 13, and a groove is opened at the top of the base 1, and a lighting lamp 16 and a shooting component 17 are fixedly connected inside the groove, and a guide frame 18 is fixedly connected to the bottom end surface of the base 1, and a lifting push rod 19 is fixedly connected inside the guide frame 18, and a controller 20 is installed on the top of the lifting push rod 19, and a guide block 21 is fixedly connected to the outer side of the controller 20, and an ultrasonic component 22 is fixedly connected to the top surface of the controller 20, and a processor 23 is installed on the bottom end surface of the base 1, and a wire 24 is fixedly connected to the outer side of the processor 23, and a U rib 25 is installed on the top of the base 1, and a panel 26 and a bridge deck 27 are installed on the top of the U rib 25.

[0041] Among them, the main body of the base 1 is a rectangular block structure, and there are two partitions A2, which are fixedly connected to each other in the transverse grooves opened in the front and rear side surfaces of the base 1, and there are four expansion push rods 3, wherein every two transversely adjacent expansion push rods 3 form a group, and the two groups of expansion push rods 3 are fixedly connected to the left and right side surfaces of the two partitions A2 in opposite directions, and the outer side of each moving seat 4 is fixedly connected to two sliders 5 in opposite directions, and the moving seat 4 is slidably connected to the transverse groove opened on the outer side of the base 1 through the sliders 5 fixedly connected on its outer side.

[0042] Among them, the connecting frame 6 and the supporting frame 7 together form an L-shaped supporting structure, and the side panel 8 and the outer side surface of the supporting frame 7 are vertically arranged, and the side panel 8 is provided at four places, wherein every two longitudinally adjacent side panels 8 are a group, and the two groups of side panels 8 are fixedly connected to the inner sides of the two supporting frames 7 in opposite directions, and the side panel 8 and the supporting frame 7 together form a supporting structure for the guide rail 10, the lighting lamp 16 is a ring-shaped LED structure, and the shooting component 17 is a CCD lens, and is electrically connected to the processor 23 fixedly connected to the bottom end surface of the base 1, and the image is transmitted through the processor 23 and the wire 24, and the connecting frame 6 is provided at four places, wherein every two longitudinally adjacent connecting frames 6 are a group.

[0043] Among them, the two groups of connecting frames 6 are fixedly connected to the side away from the base 1 with a support frame 7, and the support frame 7 and the connecting frame 6 together constitute a clamping and positioning structure for clamping the U rib 25, and the panel 26 is a steel plate structure, and the bridge deck 27 is a concrete structure, the stepping seat 13, the block 14 and the electromagnetic plate 15 together constitute an adsorption limiting structure for adsorbing the U rib 25, and when the electromagnetic plate 15 is in a energized magnetic state, the electromagnetic plate 15 can adsorb the outer wall of the U rib 25.

[0044] The present invention discloses a method for ultrasonic detection of water accumulation in a U-shaped bridge deck, comprising the following steps:

[0045] 1) By placing the base 1 under the U-rib 25, and according to the different inclination amplitudes of the U-rib 25, the unfolding push rod 3 installed on the outside of the partition A2 is started to selectively push the movable seat 4 outward or pull it inward, and when the movable seat 4 is unfolded outward, the slider 5 is used to move along the transverse groove opened on the outside of the base 1, so that the electromagnetic plate 15 is close to the outer wall of the U-rib 25, and the electromagnetic plate 15 is energized to generate magnetism, so that the electromagnetic plate 15 adsorbs the U-rib 25, and the U-rib 25 is adsorbed, connected and positioned;

[0046] 2) After the adsorption positioning is completed, the wire 24 arranged on the outside of the processor 23 can be led out and connected to the external display screen, and the bottom end surface of the U rib 25 can be illuminated by starting the lighting lamp 16 installed on the top of the base 1 to determine whether the U rib 25 has surface damage and cracks. When it is necessary to determine the water accumulation in the U rib 25, the controller 20 can be pushed upward by starting the lifting push rod 19 installed in the guide frame 18;

[0047] 3) When the controller 20 moves upward, the guide block 21 fixedly connected to the outside of the controller 20 can be synchronously moved upward along the longitudinal groove of the guide frame 18 until the ultrasonic component 22 is tightly attached to the outer wall of the U rib 25, and then the ultrasonic component 22 is started to identify and judge the water accumulation in the U rib 25;

[0048] In one embodiment, when the water accumulation in the U-rib 25 is measured, the following determination conditions are included:

[0049] When there is no water accumulation in the U-rib 25:

[0050] When the longitudinal wave is incident vertically on the steel-air interface, only the reflection signal of the steel-air interface is displayed on the display screen of the ultrasonic instrument. According to the reflection signal of the steel-air interface, it is determined that there is no water accumulation in the U rib 25.

[0051] When water accumulates in the U-rib 25:

[0052] ① Determination of water accumulation in U rib 25:

[0053] The longitudinal wave is incident vertically on the steel, water and air in turn. Since the longitudinal wave cannot propagate in the air, the reflection signal of the interface between water and air is displayed on the display screen of the ultrasonic instrument. According to the reflection signal of the interface between water and air, it is determined that there is water accumulation in the U rib 25.

[0054] ②Determination of water level:

[0055] Observe the maximum reflection signal of the water-air interface displayed on the ultrasonic instrument display screen, then adjust the gain so that the wave height reaches the curve height. At this time, read the depth value displayed on the A-type ultrasonic digital flaw detector, which is the water level value of the water accumulated in the U rib 25;

[0056] Based on the fact that the speed of sound in steel is 5900m / S and the speed of sound in water is 1480m / S, the position data of the reflected wave at the water-air interface is calculated and displayed by an ultrasonic instrument.

[0057] It should be noted that, due to the thinness of the U-rib 25 plate, when debugging the instrument, the sound path of the longitudinal wave in the U-rib 25 steel plate is regarded as a part of the probe, which is the inherent wave of the longitudinal wave straight probe, and only the water / air interface reflection signal is judged.

[0058] When the U-rib 25 is filled with water:

[0059] The longitudinal wave is incident vertically on steel, water, steel and air in sequence. Since the longitudinal wave cannot propagate in the air, the reflection signal of the steel-air interface is displayed on the display screen of the ultrasonic instrument. According to the sound path position parameters of the reflection signal of the steel-air interface, it is determined that the U-rib 25 is full of water.

[0060] It should be noted that, based on the acoustic characteristics of ultrasound, ultrasonic longitudinal waves can propagate forward in a certain direction and speed in solids and liquids. When encountering the interface between steel and air, or the interface between water and air, the ultrasound will produce wave reflection characteristics at the interface. By analyzing the amplitude, sound path and position data of the reflected signal, it can be determined whether there is water accumulation in the U rib 25 and when there is water accumulation, the height of the water accumulation can be accurately detected.

[0061] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic detection device for water accumulation in a U-shaped bridge deck, characterized in that: The invention comprises a base (1), the outer side of the base (1) is fixedly connected to a partition A (2), the outer side of the partition A (2) is fixedly connected to an expansion push rod (3), the outer side of the expansion push rod (3) is fixedly connected to a moving seat (4), the outer side of the moving seat (4) is fixedly connected to a slider (5), the outer side of the moving seat (4) is also fixedly connected to a connecting frame (6), the outer side of the connecting frame (6) is fixedly connected to a supporting frame (7), the supporting frame A side plate (8) is fixedly connected to the inner side of the longitudinal member (7), a motor (9) is installed on the outer side of the side plate (8), and a guide rail (10) is installed on the output shaft of the motor (9), and a partition plate B (11) is fixedly connected to the inside of the guide rail (10), and a stepping push rod (12) is fixedly connected to the outer side of the partition plate B (11), and a stepping seat (13) is installed on the output end of the stepping push rod (12), and the outer side of the stepping seat (13) A card block (14) is fixedly connected, and an electromagnetic plate (15) is fixedly connected to the inner side of the stepping seat (13), and a groove is provided at the top of the base (1), and a lighting lamp (16) and a shooting assembly (17) are fixedly connected inside the groove, and a guide frame (18) is fixedly connected to the bottom end surface of the base (1), and a lifting push rod (19) is fixedly connected inside the guide frame (18), and a controller (19) is installed on the top of the lifting push rod (19). 20), and a guide block (21) is fixedly connected to the outer side of the controller (20), and an ultrasonic component (22) is fixedly connected to the top surface of the controller (20), and a processor (23) is installed on the bottom surface of the base (1), and a wire (24) is fixedly connected to the outer side of the processor (23), and a U-rib (25) is installed above the base (1), and a panel (26) and a bridge deck (27) are installed on the top of the U-rib (25).

2. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 1 is characterized in that: The main body of the base (1) is a rectangular block structure, and the partition A (2) is provided at two locations, and the two partitions A (2) are fixedly connected to each other in transverse grooves opened in the front and rear side surfaces of the base (1), and the expansion push rods (3) are provided at four locations, wherein every two transversely adjacent expansion push rods (3) form a group.

3. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 2 is characterized in that: The two groups of the unfolding push rods (3) are fixedly connected oppositely to the left and right side surfaces of the two partitions A (2), and the outer side of each movable seat (4) is fixedly connected oppositely to two sliding blocks (5), and the movable seat (4) is slidably connected to the transverse groove opened on the outer side of the base (1) through the sliding blocks (5) fixedly connected on its outer side surface.

4. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 1, characterized in that: The connecting frame (6) and the supporting frame (7) together form an L-shaped supporting structure, and the side panels (8) and the outer side surfaces of the supporting frame (7) are vertically arranged, and the side panels (8) are arranged at four locations, wherein every two longitudinally adjacent side panels (8) form a group, and the two groups of side panels (8) are fixedly connected to the inner sides of the two supporting frames (7) in opposite directions, and the side panels (8) and the supporting frame (7) together form a supporting structure for supporting the guide rail (10).

5. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 1, characterized in that: The lighting lamp (16) is a ring-shaped LED structure, and the shooting component (17) is a CCD lens, and is electrically connected to the processor (23) fixedly connected to the bottom end surface of the base (1), and image transmission is performed through the processor (23) and the wire (24), and the connecting frame (6) is provided at four locations, wherein every two longitudinally adjacent connecting frames (6) form a group.

6. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 5, characterized in that: The two groups of connecting frames (6) are fixedly connected to the supporting frame (7) on one side away from the base (1), and the supporting frame (7) and the connecting frame (6) together form a clamping and positioning structure for clamping the U rib (25), and the panel (26) is a steel plate structure, and the bridge deck (27) is a concrete structure.

7. The ultrasonic detection device for water accumulation in a U-shaped bridge deck according to claim 1, characterized in that: The stepping seat (13), the clamping block (14) and the electromagnetic plate (15) together form an adsorption limiting structure for adsorbing the U-rib (25), and when the electromagnetic plate (15) is in a state of being energized and generating magnetism, the electromagnetic plate (15) can adsorb the outer wall of the U-rib (25).

8. An ultrasonic detection method for water accumulation in a U-shaped bridge deck, applicable to the ultrasonic detection device for water accumulation in a U-shaped bridge deck according to any one of claims 1 to 7, characterized in that: The ultrasonic detection method for water accumulation in a U-shaped bridge deck comprises the following steps: 1) The base (1) is placed under the U-rib (25), and the unfolding push rod (3) installed on the outside of the partition A (2) is activated to push the movable seat (4) outward or pull it inward, and when the movable seat (4) is unfolded outward, the slider (5) is moved along the transverse groove opened on the outside of the base (1), so that the electromagnetic plate (15) is close to the outer wall of the U-rib (25), and the electromagnetic plate (15) is energized to generate magnetism, so that the electromagnetic plate (15) is adsorbed on the U-rib (25); 2) After the adsorption positioning is completed, the wire (24) arranged on the outside of the processor (23) is connected to the external display screen, and the lighting lamp (16) installed on the top of the base (1) is activated to illuminate the bottom end surface of the U rib (25) to determine whether the U rib (25) has surface damage and cracks, and when the water accumulation in the U rib (25) is determined, the controller (20) is pushed upward by activating the lifting push rod (19) installed in the guide frame (18); 3) When the controller (20) moves upward, the guide block (21) fixedly connected to the outside of the controller (20) is moved upward along the longitudinal groove of the guide frame (18) until the ultrasonic component (22) is tightly fitted with the outer wall of the U rib (25), and then the ultrasonic component (22) is started to identify and judge the water accumulation in the U rib (25).

9. The ultrasonic detection method for water accumulation in a U-shaped bridge deck according to claim 8, characterized in that: When measuring the water accumulation in the U-rib (25), the following determination conditions are included: When there is no water accumulation in the U-rib (25): When the longitudinal wave is incident vertically on the steel-air interface, only the reflection signal of the steel-air interface is displayed on the display screen of the ultrasonic instrument, and it is determined that there is no water accumulation in the U rib (25) based on the reflection signal of the steel-air interface; When water accumulates in the U-rib (25): The longitudinal wave is incident vertically on the steel, water and air in sequence, and the reflection signal of the interface between water and air is displayed on the display screen of the ultrasonic instrument. According to the reflection signal of the interface between water and air, it is determined that there is water accumulation in the U rib (25); Observe the maximum reflection signal of the water-air interface displayed on the ultrasonic instrument display screen, adjust the gain so that the wave height reaches the curve height, and then read the depth value displayed on the A-type ultrasonic digital flaw detector, which is the water level value of the water accumulated in the U rib (25); Based on the sound speed in steel being 5900m / S and the sound speed in water being 1480m / S, the position data of the reflected wave at the water-air interface is calculated and displayed by an ultrasonic instrument; When the U-rib (25) is filled with water: The longitudinal wave is incident vertically on the steel, water, steel and air in sequence, and the reflection signal of the interface between the steel and the air is displayed on the display screen of the ultrasonic instrument. According to the sound path position parameter of the reflection signal of the interface between the steel and the air, it is determined that the U rib (25) is full of accumulated water.