Auxiliary device capable of being used for bridge pile foundation detection

Abstract

The utility model discloses an auxiliary device capable of being used for bridge pile foundation detection, which comprises a retracting and releasing mechanism, a supporting mechanism is arranged on the side edge of the retracting and releasing mechanism, and the retracting and releasing mechanism can control the supporting mechanism to work synchronously; the number of the supporting mechanisms is the same as that of the cables, and the cables penetrate through the supporting mechanisms; a transducer is arranged at one end of the cable, and a sound wave detector is arranged at the other end of the cable; according to the utility model, the supporting mechanism is arranged, the pulley and the pressing plate form a space for the cable to penetrate through, and the size of the space is smaller than that of the cable, so that the cable can be controlled to penetrate through the space to move under the condition that the pulley rotates, and then the transducer is driven to ascend and descend in the sounding pipe to complete the detection of the pile foundation.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection, in particular to an auxiliary device that can be used for bridge pile foundation detection. Background Art

[0002] As a critical component of bridge structures, bridge pile foundations are responsible for transmitting the various loads of the bridge superstructure deep into the subsoil. Their quality directly impacts the stability, safety, and service life of the entire bridge. If pile foundations exhibit quality issues, such as pile defects or insufficient bearing capacity, serious consequences such as uneven settlement, structural cracking, or even collapse may occur after the bridge is commissioned.

[0003] Therefore, after the construction of bridge pile foundations, pile integrity testing is necessary to determine whether there are any defects such as cracks, mud inclusions, or broken piles, in order to ensure the bearing capacity and stability of the pile foundation. Currently, there are many methods for pile foundation testing, such as the acoustic transmission method, which measures the thickness of the sediment at the bottom of the pile by measuring the difference in the propagation speed of ultrasound in the sediment at the bottom of the pile and in the concrete.

[0004] When using the acoustic wave transmission method to detect pile foundations, it is necessary to use acoustic wave transmission detection equipment, which includes an acoustic wave detector, a transducer, an acoustic detection tube, etc. The bottom of the acoustic detection tube is set to a sealed structure and buried in the concrete pile foundation. After the concrete pile foundation solidifies, the transducer connected to the acoustic wave detector is put into the acoustic detection tube and slowly moved in the acoustic detection tube to achieve the detection of the concrete pile foundation. Specifically, reference can be made to a Chinese patent with publication number CN102313778B, which discloses an acoustic wave transmission method for pile integrity detection and the detection method used therein. By setting at least two radial transducers in series at the cable end, a full-elevation lifting test process of a section can be achieved, and line tests in multiple directions can be completed simultaneously. This simplifies the test procedure, improves test efficiency, and is more conducive to the spatial positioning of defective parts. It can be widely used in transmission method detection of pile integrity.

[0005] While the acoustic transmission method can detect pile foundation integrity, it has some drawbacks. For example, the actual testing process requires the cooperation of multiple workers to lower the transducer, mounted on the end of a cable, into the acoustic testing tube. At least one worker must pull the cable to control the transducer's movement within the tube. This means that if the pile foundation has a large diameter and multiple testing points are set up, multiple transducers must be deployed and multiple workers must pull the cable to control the transducer's movement, increasing the cost of pile foundation testing. Utility Model Content

[0006] The purpose of the utility model is to provide an auxiliary device that can be used for bridge pile foundation detection, aiming to improve the problem that the acoustic wave transmission method is not conducive to completing pile foundation detection at a large number of points at a low cost.

[0007] The utility model is implemented as follows: an auxiliary device that can be used for bridge pile foundation detection includes a retracting mechanism, a supporting mechanism is arranged on the side of the retracting mechanism, and the retracting mechanism can control the supporting mechanism to work synchronously; the number of the supporting mechanisms is the same as the number of cables, and the cables pass through the supporting mechanism; a transducer is arranged at one end of the cable, and an acoustic wave detector is arranged at the other end.

[0008] Preferably, the supporting mechanism includes a base frame, a bottom tube and a wheel group. The base frame includes a bottom frame and multiple support plates. The multiple support plates are vertically arranged on the bottom frame and are divided into two groups. Two support plates are arranged in each group. The bottom tube is installed on the bottom frame, and the wheel group is installed on the two groups of support plates.

[0009] Preferably, a mounting groove is provided on the bottom frame, and an ear plate is fixedly provided on the top of the bottom tube. The ear plate is connected and arranged in the mounting groove by bolts, and the lower end of the bottom tube is lower than the bottom surface of the bottom frame.

[0010] Preferably, the wheel group includes a pulley and a pressure plate, which are arranged adjacent to each other and located on the same plane. The central axis of the pulley passes through a group of support plates, and a detachable tube is provided in the middle of the pressure plate, which passes through another group of support plates.

[0011] Preferably, the end of the detachable tube protrudes from the support plate, and a limiting bolt is threadedly provided through the end of the detachable tube, and the limiting bolt is provided on the side of the support plate.

[0012] Preferably, the end of the pulley center shaft also protrudes from a support plate, a threaded column is threaded through a certain support plate, and a brake plate is provided at the end of the threaded column, which can press against the end of the pulley center shaft.

[0013] Preferably, the retractable mechanism includes a rotating shaft, a bracket and multiple sets of transmission devices. The rotating shaft passes through the bracket and is provided with a rotating wheel at the end. The multiple sets of transmission devices are statically sleeved on the rotating shaft, and the number is equal to that of the supporting mechanism.

[0014] Preferably, the transmission device includes a central tube and a third sprocket, wherein the central tube passes through the third sprocket and is sleeved on the rotating shaft. A snap groove is provided on the rotating shaft, the length of the snap groove being equal to the length of the rotating shaft, and a snap column is fixedly provided on the inner side surface of the central tube, and the snap column is located in the snap groove.

[0015] Preferably, a first sprocket is provided at the end of the central axis of the pulley, and the first sprocket is connected to the third sprocket via a chain.

[0016] Preferably, the supporting mechanism also includes an adjusting device, which includes a movable plate, a second sprocket and two fixed plates. The two fixed plates are fixedly mounted on the bottom frame, and bosses are fixedly provided on the sides close to each other. A groove is provided on the side wall of the movable plate, and the lower end is inserted into the two fixed plates. The boss is located in the groove, and the end of the pressing bolt provided with a thread passing through the fixed plate presses the movable plate; the second sprocket is provided on the top of the movable plate and can be connected to the first sprocket and the third sprocket through the sprocket.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model is provided with a supporting mechanism, which forms a space for the cable to pass through through a pulley and a pressure plate, and the size of the space is smaller than the size of the cable. Therefore, when the pulley rotates, the cable can be controlled to move through the space, thereby driving the transducer to rise and fall in the acoustic detection tube to complete the detection of the pile foundation.

[0019] The utility model is provided with a retracting and extending mechanism. When the rotating shaft rotates under the action of an external force, multiple transmission devices are driven to rotate. Since the transmission devices are connected to the pulleys, the pulleys of multiple supporting mechanisms rotate synchronously under the action of the rotating shaft, thereby adjusting the synchronous lifting and lowering of multiple transducers, changing the current situation where the lifting and lowering of multiple transducers is controlled by multiple staff members. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the utility model as a whole;

[0021] Figure 2 This is a structural diagram of the supporting mechanism of the utility model;

[0022] Figure 3 It is a structural diagram of the chassis of the utility model;

[0023] Figure 4 This is a schematic structural diagram of the bottom pipe of the utility model;

[0024] Figure 5 It is a structural diagram of the wheel assembly of the utility model;

[0025] Figure 6 It is a structural diagram of the regulating device of the utility model;

[0026] Figure 7 It is a structural diagram of the retractable and unfolding mechanism of the utility model;

[0027] Figure 8 It is a structural diagram of the transmission device of the utility model.

[0028] In the figure: 1. ultrasonic detector; 2. cable; 3. transducer; 4. retractable mechanism; 41. rotating wheel; 42. transmission device; 421. central tube; 422. third sprocket; 423. snap column; 43. bracket; 44. rotating shaft; 45. snap groove; 5. supporting mechanism; 51. base frame; 511. bottom frame; 512. support plate; 513. brake plate; 514. threaded column; 515. mounting groove; 52. wheel assembly; 521. pulley; 522. pressure plate; 523. detachable tube; 524. limiting bolt; 525. first sprocket; 53. bottom tube; 531. ear plate; 54. adjusting device; 541. fixed plate; 542. boss; 543. movable plate; 544. second sprocket; 545. groove; 546. pressure bolt. DETAILED DESCRIPTION

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] The following is a further description with reference to the accompanying drawings and specific embodiments: Example 1

[0031] In order to facilitate the detection of pile foundations with larger diameters and reduce costs, this embodiment provides an auxiliary device for detecting pile foundations using the acoustic wave transmission method. With the help of this auxiliary device, a staff member can control multiple transducers 3 to rise and fall synchronously in multiple acoustic detection tubes to obtain data on the propagation of sound in the concrete pile foundation and realize the detection of the pile foundation.

[0032] like Figure 1Before introducing the auxiliary equipment, a brief introduction to the equipment used in the acoustic wave transmission method is necessary. Specifically, it includes an acoustic wave detector 1, a transducer 3, an acoustic detection tube, and a cable 2. The acoustic detection tube is pre-buried in the pile foundation and can be a metal tube (such as steel or cast iron) or a plastic tube (such as PVC or PE). It has a certain strength and rigidity to withstand the pressure and vibration during concrete pouring. Furthermore, a seal is provided at the bottom of the acoustic detection tube to prevent concrete slurry from entering the tube from the bottom. The acoustic wave detector 1 includes a transmitting system, a receiving system, and a display and control system. The transmitting system includes a pulse signal generator and a power amplifier. The pulse signal generator generates an electrical pulse signal of a specific frequency and amplitude to excite the transmitting transducer. The power amplifier amplifies the weak electrical signal generated by the pulse signal generator to drive the transmitting transducer. The receiving system includes a preamplifier, a filter, and a data acquisition card. The preamplifier performs preliminary amplification of the weak acoustic wave signal received by the receiving transducer. The filter performs filtering processing on the amplified signal to remove noise and interference signals and improve the signal quality. The data acquisition card converts the analog signal into a digital signal, and collects and stores it for subsequent analysis and processing. The display and control system includes a display screen and an operation panel. The display screen displays the waveform, spectrum and other information of the acoustic signal in real time, making it convenient for the operator to observe and analyze. The operation panel is used to set detection parameters such as the transmission frequency, gain, sampling frequency, etc., and to control operations such as starting and stopping the detection process. The transducer 3 includes a transmitting transducer and a receiving transducer, both of which include a piezoelectric ceramic chip, a housing, and a cable connector. The piezoelectric ceramic chip converts the electrical signal into mechanical vibration to generate an ultrasonic signal, or converts the received ultrasonic signal into an electrical signal.

[0033] like Figure 1 As shown, the auxiliary device includes a retractable mechanism 4 and multiple supporting mechanisms 5. These supporting mechanisms 5 are positioned at the top of the acoustic testing tube. They simultaneously support the cables 2, stabilize the transducer 3 within the tube, and provide support for controlling the transducer 3's elevation within the tube. The retractable mechanism 4 controls the synchronous operation of the multiple supporting mechanisms 5, thereby controlling the simultaneous elevation of multiple transducers 3. This supports comprehensive pile foundation testing and reduces testing costs.

[0034] like Figure 2 、 Figure 3 、 Figure 5As shown, specifically, the supporting mechanism 5 includes a base frame 51 and a wheel assembly 52. ​​The base frame 51 includes a bottom frame 511 and a plurality of support plates 512. The plurality of support plates 512 are vertically arranged on the bottom frame 511 and are evenly divided into two groups, each group having two support plates 512. The wheel assembly 52 includes a pulley 521 and a pressure plate 522. The pulley 521 and the pressure plate 522 are adjacently arranged and located on the same surface. The space formed by the pulley 521 and the pressure plate 522 is slightly smaller than the size of the cable 2. When the pulley 521 rotates, the cable 2 can be controlled to move, or when the pulley 521 is stationary, the cable 2 can be controlled to remain stationary, thereby controlling the stable placement of the transducer 3. In addition, the pulley 521 is located between one group of two support plates 512, and the central axis passes through the support plate 512. The pressure plate 522 is set between another group of two support plates 512, and a detachable tube 523 is set in the middle. The detachable tube 523 passes through the other group of support plates 512. Therefore, the pulley 521 and the pressure plate 522 are stably installed on the base frame 51, so that under the action of the base frame 51, the wheel group 52 can be stably placed relative to the pile foundation.

[0035] like Figure 2 、 Figure 3 、 Figure 4 As shown, in order to stably position the wheel assembly 52 on the side of the acoustic detection tube, the supporting mechanism 5 also includes a bottom tube 53. The bottom tube 53 is inserted into the top of the acoustic detection tube, and the bottom tube 53 controls the base frame 51 to be stably placed relative to the acoustic detection tube. In order to stably mount the bottom tube 53 relative to the base frame 51, an ear plate 531 is fixedly mounted on the top of the bottom tube 53, and a mounting groove 515 is provided on the bottom frame 511. The ear plate 531 is connected by bolts and is mounted in the mounting groove 515. Therefore, the bottom tube 53 and the bottom frame 511 are relatively stably connected and can be quickly disassembled as needed, providing convenience for replacing the bottom tube 53 to adapt to different acoustic detection tubes.

[0036] like Figure 5 As shown, in order to be able to remove the pressure plate 522 and allow the cable 2 to pass through the space formed by the pressure plate 522 and the pulley 521, the end of the detachable tube 523 protrudes from the support plate 512, and a limiting bolt 524 is threaded through the end of the detachable tube 523. The limiting bolt 524 is set on the side of the support plate 512. Under the action of the limiting bolt 524, the detachable tube 523 is limited to be stably placed relative to the support plate 512, and after the limiting bolt 524 is removed, support is provided for the detachable tube 523 to be separated from the pressure plate 522.

[0037] like Figure 5 、 Figure 7 、 Figure 8As shown, to control the rotation of the pulley 521 and adjust the position of the transducer 3, the retractable mechanism 4 includes a rotating shaft 44, a bracket 43, and multiple sets of transmission components 42. The rotating shaft 44 is arranged through the bracket 43 and is provided with a rotating wheel 41 at its end. Therefore, the rotating shaft 44 is stably arranged on the side of the supporting mechanism 5 under the action of the bracket 43, and the rotation of the rotating shaft 44 can be controlled by rotating the rotating wheel 41. The multiple sets of transmission components 42 are statically mounted on the rotating shaft 44, and the number of the multiple transmission components 42 is equal to that of the supporting mechanism 5. Specifically, the transmission components 42 include a central tube 421 and a third sprocket 422. The central tube 421 is arranged through the third sprocket 422 and is mounted on the rotating shaft 44. At the same time, a first sprocket 525 is provided at the end of the central axis of the pulley 521 protruding from the support plate 512. The first sprocket 525 is connected to the third sprocket 422 by a chain. Therefore, when the rotating shaft 44 rotates, the transmission device 42 rotates and controls the pulley 521 to rotate, thereby driving the cable 2 to move and realize the lifting and lowering of the transducer 3.

[0038] like Figure 7 、 Figure 8 As shown, in order to make the center tube 421 rotate synchronously with the rotating shaft 44, a snap groove 45 is provided on the rotating shaft 44, and the length of the snap groove 45 is equal to the length of the rotating shaft 44. A snap column 423 is fixedly provided on the inner side surface of the center tube 421, and a bolt is provided through the end thread. The snap column 423 is located in the snap groove 45, and the end of the bolt is pressed against the rotating shaft 44. Therefore, under the action of the snap column 423 and the bolt, the center tube 421 is stably connected to the rotating shaft 44, and at the same time, it is convenient to adjust the position of the third sprocket 422 according to needs so that it is opposite to the first sprocket 525.

[0039] like Figure 3 As shown, in order to stop the pulley 521 from rotating and thereby stabilize the transducer 3 at a certain position on the acoustic detection tube, a support plate 512 is also protruded from the other end of the central axis of the pulley 521. A threaded post 514 is threadedly provided through one of the support plates 512, and a brake plate 513 is provided at the end of the threaded post 514. Rotating the threaded post 514 controls the raising and lowering of the brake plate 513. Therefore, when the brake plate 513 presses against the end of the central axis of the pulley 521, the pulley 521 can be stabilized under the action of resistance. Example 2

[0040] like Figure 2 、 Figure 6As shown, based on Example 1, due to the different positions of the acoustic detection tubes, in order to connect the first sprocket 525 to the third sprocket 422 via a chain, the supporting mechanism 5 further includes an adjusting device 54, which includes a movable plate 543, a second sprocket 544, and two fixed plates 541. The two fixed plates 541 are fixedly mounted on the base frame 511, and protrusions 542 are fixedly provided on the sides adjacent to each other. The sidewalls of the movable plate 543 are provided with grooves 545, and the lower end is inserted into the two fixed plates 541. The protrusions 542 are located in the grooves 545. Therefore, the movable plate 543 is stably and adjustably arranged between the two fixed plates 541. To ensure that the movable plate 543 can be stably placed relative to the fixed plates 541 after the height is adjusted, a pressure bolt 546 is threaded through the top of the fixed plates 541. The end of the pressure bolt 546 presses against the movable plate 543, ensuring that the movable plate 543 is stably mounted relative to the fixed plates 541. In addition, the second sprocket 544 is arranged on the top of the movable plate 543, and can be connected to the first sprocket 525 and the third sprocket 422 through the sprocket. Therefore, when the positions of multiple supporting mechanisms 5 relative to the retracting mechanism 4 are different, the position of the second sprocket 544 can be adjusted to adjust the chain laying shape to achieve the connection between the first sprocket 525 and the third sprocket 422.

[0041] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An auxiliary device that can be used for bridge pile foundation detection, characterized in that: The invention comprises a retractable mechanism (4), a supporting mechanism (5) is arranged on the side of the retractable mechanism (4), and the retractable mechanism (4) can control the supporting mechanism (5) to work synchronously; the number of the supporting mechanisms (5) is the same as the number of cables (2), and the cables (2) are arranged through the supporting mechanisms (5); a transducer (3) is arranged at one end of the cable (2), and an acoustic wave detector (1) is arranged at the other end.

2. The auxiliary device for bridge pile foundation detection according to claim 1, characterized in that: The supporting mechanism (5) comprises a base frame (51), a base tube (53) and a wheel assembly (52); the base frame (51) comprises a base frame (511) and a plurality of support plates (512); the plurality of support plates (512) are vertically arranged on the base frame (511) and are divided into two groups, each group having two support plates (512); the base tube (53) is mounted on the base frame (511), and the wheel assembly (52) is mounted on the two groups of support plates (512).

3. The auxiliary device for bridge pile foundation detection according to claim 2, characterized in that: A mounting groove (515) is provided on the bottom frame (511), and an ear plate (531) is fixedly provided on the top of the bottom tube (53). The ear plate (531) is connected and provided in the mounting groove (515) by bolts, and the lower end of the bottom tube (53) is lower than the bottom surface of the bottom frame (511).

4. The auxiliary device for bridge pile foundation detection according to claim 3, characterized in that: The wheel group (52) includes a pulley (521) and a pressure plate (522). The pulley (521) and the pressure plate (522) are arranged adjacent to each other and located on the same surface. The central axis of the pulley (521) passes through one group of support plates (512). A detachable tube (523) is provided in the middle of the pressure plate (522). The detachable tube (523) passes through another group of support plates (512).

5. The auxiliary device for bridge pile foundation detection according to claim 4, characterized in that: The end of the detachable tube (523) protrudes from the support plate (512), and a limiting bolt (524) is threadedly provided through the end of the detachable tube (523), and the limiting bolt (524) is provided on the side of the support plate (512).

6. The auxiliary device for bridge pile foundation detection according to claim 4, characterized in that: The end of the central axis of the pulley (521) is also protruded from the support plate (512), and a threaded column (514) is threadedly provided on one of the support plates (512). A brake plate (513) is provided at the end of the threaded column (514), and the brake plate (513) can be set to press the end of the central axis of the pulley (521).

7. The auxiliary device for bridge pile foundation detection according to claim 4, characterized in that: The retractable mechanism (4) comprises a rotating shaft (44), a bracket (43) and a plurality of transmission components (42). The rotating shaft (44) is arranged to pass through the bracket (43) and a rotating wheel (41) is arranged at the end thereof. The plurality of transmission components (42) are stationarily sleeved on the rotating shaft (44), and the number of the plurality of transmission components (42) is equal to that of the supporting mechanism (5).

8. The auxiliary device for bridge pile foundation detection according to claim 7, characterized in that: The transmission device (42) comprises a central tube (421) and a third sprocket (422). The central tube (421) is arranged to pass through the third sprocket (422) and is sleeved on the rotating shaft (44). A snap groove (45) is provided on the rotating shaft (44). The length of the snap groove (45) is equal to the length of the rotating shaft (44). A snap column (423) is fixedly provided on the inner side surface of the central tube (421). The snap column (423) is located in the snap groove (45).

9. The auxiliary device for bridge pile foundation detection according to claim 8, characterized in that: A first sprocket (525) is provided at the end of the central axis of the pulley (521), and the first sprocket (525) is connected to the third sprocket (422) through a chain.

10. The auxiliary device for bridge pile foundation detection according to claim 9, characterized in that: The supporting mechanism (5) also includes an adjusting device (54), which includes a movable plate (543), a second sprocket (544) and two fixed plates (541). The two fixed plates (541) are fixedly mounted on the bottom frame (511), and convex columns (542) are fixedly arranged on the sides close to each other. A groove (545) is arranged on the side wall of the movable plate (543), and the lower end is inserted into the two fixed plates (541). The convex column (542) is located in the groove (545), and the end of the pressing bolt (546) provided with a thread passing through the fixed plate (541) presses against the movable plate (543); the second sprocket (544) is arranged on the top of the movable plate (543) and can be connected to the first sprocket (525) and the third sprocket (422) through the sprocket.

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