Bridge pier column bearing capacity testing device

Abstract

The invention provides a bridge pier column bearing capacity test device, which belongs to the technical field of bridge pier column bearing test, and comprises a horizontal slide rail, a horizontal trolley slidably connected to the horizontal slide rail, a cross beam arranged at the upper end of the horizontal trolley, a hydraulic turntable fixedly connected to the bottom of the cross beam, and a hydraulic telescopic arm rotatably connected to the bottom of the hydraulic turntable. A balance weight body is arranged at the telescopic end of the hydraulic telescopic arm, rollers are arranged at the bottom of the balance weight body, one end of the horizontal sliding rail is hinged to an inclined rail, a bearing block is slidably connected to the upper side of the inclined rail, a lifting rod is arranged on the upper side of the bearing block, and a measuring flat plate is fixedly connected to the upper side of the lifting rod. The upper end of the vertical rod is fixedly connected with a rotating motor, a spindle of the rotating motor is fixedly connected with a rotating arm, and the upper side and the lower side of the rotating arm are fixedly connected with displacement sensors. According to the invention, the movement position of the counterweight body on the surface of the bridge is more fully covered, and the test is more comprehensive compared with the existing vertical pressure applied to a fixed point.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge pier bearing tests, and particularly relates to a bridge pier bearing capacity test device. Background Art

[0002] When a bridge pier is subjected to the vertical load generated by the upper bridge, it will also be subjected to dynamic loads generated by wind, earthquake, vehicles, etc. By conducting pulsation tests on the structure, exciting the bridge structure through vehicle driving, braking, or other excitation methods to test the dynamic deflections, dynamic strains, and modal parameters (natural vibration frequency, vibration mode, vibration mode damping ratio, strain mode) of each control part on the bridge structure, and then identifying the damage of the structure through the modal parameters.

[0003] In traditional bridge pier bearing test devices, the loading direction is single, and the mutual influence between loads in different directions during the loading process does not need to be considered. However, there is a superposition effect between the settlement of the bridge pier and the downward movement of the bridge relative to the bridge pier after bearing the load, making it impossible to effectively control and distinguish the bearing capacity of the bridge pier foundation relative to the bearing capacity of the bridge. Summary of the Invention

[0004] To solve the above problems existing in the size of the existing geotechnical strength detection device, the present invention provides a bridge pier bearing capacity test device, which considers the mutual influence between loads in different directions during the loading process, and the bearing capacity test of the bridge can be effectively controlled and distinguished.

[0005] The present invention adopts the following technical solutions to solve the above problems:

[0006] A bridge pier bearing capacity test device is arranged on the side of the bridge pier and includes a track assembly, a measurement assembly, and a connection and fixation assembly. The track assembly includes a horizontal slide rail and an inclined rail. One end of the horizontal slide rail is hinged to the inclined rail, and the other end of the horizontal slide rail is fixedly connected to a reference platform. The measurement assembly includes a bearing capacity detection assembly and a settlement detection assembly. The bearing capacity detection assembly is arranged above the horizontal slide rail. The settlement detection assembly includes a measurement flat plate and a displacement sensor. The measurement flat plate is slidably connected to the inclined rail through a lifting mechanism. The connection and fixation assembly includes a hoop, and the hoop is fixedly connected to the displacement sensor through a power swing arm assembly.

[0007] Further, the bearing capacity detection assembly includes a hydraulic telescopic arm and a counterweight. The counterweight is connected to the telescopic end of the hydraulic telescopic arm. The other end of the hydraulic telescopic arm is connected to a hydraulic turntable. The hydraulic turntable is connected to a cross beam. The cross beam is connected to a horizontal trolley, and the horizontal trolley is slidably connected to the horizontal slide rail.

[0008] Further, the horizontal trolley is fixedly connected with an arc-shaped plate. A plurality of round rods are rotatably connected to the outer arc surface of the arc-shaped plate at intervals. The telescopic end of the hydraulic telescopic arm is fixedly connected with a hanging rod. The lower end of the hanging rod is slidably connected with a counterweight. At both ends of the upper side of the counterweight, circular rods are fixedly connected. The upper ends of the circular rods are fixedly connected with side plates. One side of the side plate is rotatably connected with a disc. The rotating shaft of the disc is higher than the round rods, and the lowest point of the outer circle of the disc is lower than the round rods. The bottom of the counterweight is vertically slidably installed with rollers through spring columns.

[0009] Further, the telescopic end of the hydraulic telescopic arm is rotatably connected with a circular wheel. One end of the upper side of the measuring flat plate is fixedly connected with a vertical plate. Arc-shaped baffles are arranged at the upper ends of the two vertical plates. The arc-shaped baffles are arranged corresponding to the circular wheel.

[0010] Further, one slide plate is fixedly connected to each of the two ends of the arc-shaped baffle. The slide plates are vertically slidably and limitedly connected with the vertical plates.

[0011] Further, the lifting mechanism includes a load-bearing block and a lifting rod. The load-bearing block is slidably connected to the upper side of the inclined rail. The lifting rod is arranged on the upper side of the load-bearing block. The upper side of the lifting rod is fixedly connected with the measuring flat plate.

[0012] Further, the inclined rail is provided with a vertical through groove. One side of the load-bearing block is fixedly connected with a settlement measuring rod. The lower end of the settlement measuring rod is rotatably connected with a rolling wheel. The rolling wheel is in rolling connection with the ground surface of the foundation.

[0013] Further, the power swing arm assembly includes a vertical rod, a rotating motor and a swing arm. The vertical rods are respectively fixedly connected to two corners of the hoop. The upper end of the vertical rod is fixedly connected with the rotating motor. The main shaft of the rotating motor is fixedly connected with the swing arm. Displacement sensors are respectively fixedly connected to the upper side and the lower side of the swing arm.

[0014] Further, the number of the horizontal trolleys is one. The horizontal trolley is arranged on one side of the bridge pier. The lifting mechanism and the measuring flat plate are made of lightweight materials.

[0015] Further, the number of the horizontal trolleys is two. The two horizontal trolleys are respectively arranged on both sides of the bridge pier. The top beams of the two horizontal trolleys are fastened together with bolts to form an integral body. The two horizontal trolleys share a hydraulic turntable. The lifting mechanism and the measuring flat plate are made of lightweight materials.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The bridge pier bearing capacity test device provided by the present invention enables the counterweight to rotate on the bridge surface through a hydraulic turntable. By changing the load position, the bearing capacity and stability structure of the bridge pier are measured, and the defects existing in the bridge structure design can be obtained in a timely manner, avoiding the occurrence of safety incidents such as the overturning of the bridge under uneven loads during actual use.

[0018] 2. When the counterweight rotates, by extending or retracting the hydraulic telescopic arm, the movement position of the counterweight on the bridge surface can be more fully covered. Compared with the existing vertical pressure applied at fixed points, the test is more comprehensive.

[0019] 3. Through the monitoring of the displacement sensors on the upper side of the hoop and the rotating arm, and at the same time, the displacement sensors on the lower side of the rotating arm and the measuring plate detect the changes in the settlement of the foundation and the bridge pier. Through the comprehensive comparison of the two sets of data, the comprehensive bearing capacity test results of the bridge pier are obtained, and the two can be separately distinguished and the comprehensive bearing capacity of the bridge pier can be studied through the same load. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the basic structural schematic diagram of the present invention;

[0022] Figure 2 is Figure 1 the partial enlarged view at E in

[0023] Figure 3 is Figure 1 the partial enlarged view at F in

[0024] Figure 4 is the connection structure schematic diagram of the load-bearing block and the inclined rail of the present invention;

[0025] Figure 5 is the structural schematic diagram of the counterweight lifting through a round rod of the present invention.

[0026] In the figure, 1 - horizontal slide rail; 10 - reference platform; 11 - horizontal trolley; 12 - cross beam; 13 - hydraulic turntable; 14 - hydraulic telescopic arm; 2 - counterweight; 3 - inclined rail; 31 - load-bearing block; 32 - lifting rod; 33 - measuring flat plate; 34 - settlement measuring rod; 4 - hoop; 41 - vertical rod; 42 - rotating motor; 43 - rotating arm; 44 - displacement sensor; 5 - arc plate; 51 - round rod; 52 - suspension rod; 53 - circular rod; 54 - side plate; 55 - disc; 6 - circular wheel; 61 - vertical plate; 62 - baffle; 63 - sliding plate. Detailed implementation manner

[0027] In the description of the present invention, unless otherwise specified, the orientation or state relationship indicated by terms such as "upper", "lower", "top", "bottom", "longitudinal", etc. is the orientation or state relationship based on the orientation or state relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure 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 to the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication or connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] As Figures 1-5 As shown, the present invention provides a bearing capacity test device for bridge piers, including a horizontal slide rail 1. One end of the horizontal slide rail 1 is fixedly connected to a reference platform 10. The reference platform 10 is arranged away from the bridge pier and is set on a stable ground not affected by the bridge pier. A horizontal trolley 11 is slidably connected to the horizontal slide rail 1. A cross beam 12 is arranged at the upper end of the horizontal trolley 11. The bottom of the cross beam 12 is fixedly connected to a hydraulic turntable 13. One horizontal trolley 11 is arranged on one side of the bridge pier or one horizontal trolley 11 is arranged on each side respectively. The top beams of the two horizontal trolleys 11 are fastened together by bolts to form an integral body and share a hydraulic turntable 13 for performing unilateral or all-round bearing tests on the bridge. The bottom of the hydraulic turntable 13 is rotatably connected to a hydraulic telescopic arm 14. A counterweight 2 is arranged at the telescopic end of the hydraulic telescopic arm 14. Rollers are arranged at the bottom of the counterweight 2. One end of the horizontal slide rail 1 is hinged to an inclined rail 3. A load-bearing block 31 is slidably connected to the upper side of the inclined rail 3. A lifting rod 32 is arranged on the upper side of the load-bearing block 31. A measuring flat plate 33 is fixedly connected to the upper side of the lifting rod 32. The lifting rod 32 and the measuring flat plate 33 are made of lightweight materials, such as aluminum alloy materials. The lifting rod 32 is a hollow rod structure;

[0030] It further includes a hoop 4 which is fixedly connected to the bridge pier. The hoop 4 is enclosed around the upper end of the bridge pier by two U-shaped frames through bolts. Two vertical rods 41 are respectively fixedly connected to the two corners of the hoop 4. A rotary motor 42 is fixedly connected to the upper end of the vertical rod 41. The main shaft of the rotary motor 42 is fixedly connected to a rotary arm 43. Displacement sensors 44 are respectively fixedly connected to the upper side and the lower side of the rotary arm 43. The rotary motor 42 drives the rotary arm 43 to change the measurement position. The displacement sensor 44 on the upper side of the rotary arm 43 contacts the bottom surface of the bridge to measure the bearing deformation of the bridge relative to the bridge pier. The displacement sensor 44 at the bottom of the rotary arm 43 and the measurement flat plate 33 measure the settlement of the bridge pier relative to the foundation.

[0031] In the present invention, the counterweight 2 is rotated on the bridge surface by the hydraulic turntable 13. By changing the load position, the bearing capacity and stable structure of the bridge pier are measured, and the defects existing in the bridge structure design can be obtained immediately, avoiding the occurrence of safety incidents such as the bridge tipping over under uneven loads during actual use; when the counterweight 2 rotates, by extending or retracting the hydraulic telescopic arm 14, the movement position of the counterweight 2 on the bridge surface can be covered more fully. Compared with the existing vertical pressure applied at fixed points, the test is more comprehensive.

[0032] The reference platform 10 stably supports the horizontal trolley 11. The horizontal slide rail 1 is connected to the reference platform 10 and is not affected by the settlement deformation of the foundation near the bridge pier. The inclined rail 3 hinged at the end of the horizontal slide rail 1 rotates due to the settlement change of the foundation. A load-bearing block 31 is slidably connected to the upper side of the inclined rail 3 and slides by gravity from a high place and gradually approaches the bridge pier. The measurement flat plate 33 and the displacement sensor 44 on the lower side of the rotary arm 43 form a linear displacement change monitoring data. Therefore, the bearing change between the bridge and the bridge pier is monitored by the hoop 4 and the displacement sensor 44 on the upper side of the rotary arm 43. At the same time, the displacement sensor 44 on the lower side of the rotary arm 43 and the measurement flat plate 33 detect the settlement change between the foundation and the bridge pier. Through the comprehensive comparison of the two sets of data, the comprehensive bearing capacity test results of the bridge pier are obtained, and the two can be separately distinguished and can also study the comprehensive bearing capacity of the bridge pier through the same load.

[0033] As a further implementation manner of the present invention, the horizontal trolley 11 is fixedly connected to an arc-shaped plate 5. A plurality of round rods 51 are rotatably connected at intervals on the outer arc surface of the arc-shaped plate 5. The telescopic end of the hydraulic telescopic arm 14 is fixedly connected to a suspension rod 52. The lower end of the suspension rod 52 is slidably connected to the counterweight 2. Two circular rods 53 are fixedly connected to the upper side ends of the counterweight 2. The upper ends of the circular rods 53 are fixedly connected to side plates 54. A disc 55 is rotatably connected to one side of the side plate 54. The rotation axis of the disc 55 is higher than the round rod 51, and the lowest point of the outer circle of the disc 55 is lower than the round rod 51. The roller is vertically slidably installed at the bottom of the counterweight 2 through a spring column.

[0034] In the above further embodiment, the hydraulic telescopic arm 14 rotates to move the counterweight 2 on the bridge surface. When the side surface of the disc 55 touches the round rod 51, due to the outer circle structure of the disc 55, the side plate 54 and the circular rod 53 lift the counterweight 2, reducing the load on the bridge. When the disc 55 leaves the round rod 51, under the action of gravity, the counterweight 2 quickly falls, forming an impact load on the bridge, and the dynamic load generated by the driving of the vehicle can be more conveniently realized.

[0035] As a further embodiment of the present invention, the telescopic end of the hydraulic telescopic arm 14 is rotatably connected to the circular wheel 6. One end of the upper side of the measuring flat plate 33 is fixedly connected to the vertical plate 61. Arc-shaped baffles 62 are arranged at the upper ends of the two vertical plates 61. The arc-shaped baffles 62 are arranged corresponding to the circular wheel 6. Both ends of the arc-shaped baffles 62 are respectively fixedly connected to a slide plate 63. The slide plate 63 is vertically slidably and limitedly connected to the vertical plate 61.

[0036] The inclined rail 3 is provided with a vertical through groove. One side of the load-bearing block 31 is fixedly connected to the settlement measuring rod 34. The lower end of the settlement measuring rod 34 is rotatably connected to a rolling wheel. The rolling wheel contacts the ground surface and is used for the settlement change of the foundation of the bridge pier within the range where the foundation of the bridge pier gradually approaches from a distance, so that the present invention can not only test the bearing strength of the bridge pier on the bridge, but also measure the change of the foundation when the foundation settlement affects the bridge pier.

[0037] In the above further embodiment, the circular wheel 6 at the end of the hydraulic telescopic arm 14 presses the arc-shaped baffle 62, pushing the vertical plate 61 and the lifting rod 32 upward along the inclined rail 3. The end of the inclined rail 3 close to the bridge pier will form different angular changes due to the foundation deformation. The two slide plates 63 are vertically slidably and limitedly connected to the vertical plate 61 to adapt to the different angular settlement changes of the two inclined rails 3, so that different deformations around the bridge pier can be effectively monitored; and the rolling wheel at the lower end of the settlement measuring rod 34 always contacts the foundation. When the counterweight 2 is not applied, the settlement measuring rod 34 obtains a basic measurement value, and during the dynamic load change of the counterweight 2, the ground surface from far to near the ground surface of the bridge pier can be effectively measured. Therefore, through the monitoring of the displacement sensor 44 and the settlement measuring rod 34 respectively fixedly connected to the upper side and the lower side of the rotating arm 43, the bearing capacity of the bridge pier can be comprehensively and comprehensively tested.

[0038] The above has described the present invention in detail through embodiments, but the content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A bearing capacity test device for bridge piers, which is arranged on the side of the bridge pier, and is characterized in that: It includes an orbital assembly, a measurement assembly and a connection and fixation assembly. The orbital assembly includes a horizontal slide rail (1) and an inclined rail (3). One end of the horizontal slide rail (1) is hinged to the inclined rail (3), and the other end of the horizontal slide rail (1) is fixedly connected to a reference table (10). The measurement assembly includes a bearing capacity detection assembly and a settlement detection assembly. The bearing capacity detection assembly is arranged above the horizontal slide rail (1). The settlement detection assembly includes a measurement flat plate (33) and a displacement sensor (44). The measurement flat plate (33) is slidably connected to the inclined rail (3) through a lifting mechanism. The connection and fixation assembly includes a hoop (4), and the hoop (4) is fixedly connected to the displacement sensor (44) through a power swing arm assembly.

2. The bearing capacity test device for bridge piers according to claim 1, characterized in that: The bearing capacity detection assembly includes a hydraulic telescopic arm (14) and a counterweight (2). The counterweight (2) is connected to the telescopic end of the hydraulic telescopic arm (14). The other end of the hydraulic telescopic arm (14) is connected to a hydraulic turntable (13). The hydraulic turntable (13) is connected to a cross beam (12). The cross beam (12) is connected to a horizontal trolley (11), and the horizontal trolley (11) is slidably connected to the horizontal slide rail (1).

3. The bearing capacity test device for bridge piers according to claim 2, wherein: The horizontal trolley (11) is fixedly connected with an arc plate (5). A plurality of round rods (51) are rotatably connected to the outer arc surface of the arc plate (5) at intervals. The telescopic end of the hydraulic telescopic arm (14) is fixedly connected with a suspension rod (52). The lower end of the suspension rod (52) is slidably connected to the counterweight (2). Two ends of the upper side of the counterweight (2) are fixedly connected with round rods (53). The upper ends of the round rods (53) are fixedly connected with side plates (54). One side of the side plate (54) is rotatably connected with a disc (55). The rotating shaft of the disc (55) is higher than the round rod (51), and the lowest point of the outer circle of the disc (55) is lower than the round rod (51). The bottom of the counterweight (2) is vertically slidably installed with rollers through spring columns.

4. The bearing capacity test device for bridge piers according to claim 2, characterized in that: The telescopic end of the hydraulic telescopic arm (14) is rotatably connected with a circular wheel (6). One end of the upper side of the measurement flat plate (33) is fixedly connected with a vertical plate (61). Arc-shaped baffles (62) are arranged at the upper ends of the two vertical plates (61), and the arc-shaped baffles (62) are arranged corresponding to the circular wheel (6).

5. The bearing capacity test device for bridge piers according to claim 4, characterized in that: Both ends of the arc-shaped baffle (62) are respectively fixedly connected with a slide plate (63), and the slide plate (63) is vertically slidably and limitedly connected to the vertical plate (61).

6. The bearing capacity test device for bridge piers according to claim 1, wherein: The lifting mechanism includes a load-bearing block (31) and a lifting rod (32). The load-bearing block (31) is slidably connected to the upper side of the inclined rail (3). The lifting rod (32) is arranged on the upper side of the load-bearing block (31), and the upper side of the lifting rod (32) is fixedly connected to the measurement flat plate (33).

7. The bridge pier column bearing capacity test device according to claim 6, characterized in that: The inclined rail (3) is provided with a vertical through groove. One side of the load-bearing block (31) is fixedly connected with a settlement measurement rod (34). The lower end of the settlement measurement rod (34) is rotatably connected with a rolling wheel, and the rolling wheel is in rolling connection with the ground surface.

8. The bearing capacity test device for bridge piers according to claim 1, characterized in that: The power swing arm assembly includes a vertical rod (41), a rotating motor (42) and a swing arm (43). The vertical rod (41) is fixedly connected to two corners of the hoop (4) respectively. The upper end of the vertical rod (41) is fixedly connected to the rotating motor (42). The main shaft of the rotating motor (42) is fixedly connected to the swing arm (43). The displacement sensors (44) are fixedly connected to the upper side and the lower side of the swing arm (43) respectively.

9. A bearing capacity test device for bridge piers according to any one of claims 2-4, characterized in that: The number of the horizontal trolleys (11) is one. The horizontal trolley (11) is arranged on one side of the bridge pier. The lifting mechanism and the measuring plate (33) are made of lightweight materials.

10. A bridge pier bearing capacity test device according to any one of claims 2-4, characterized in that: The number of the horizontal trolleys (11) is two. The two horizontal trolleys (11) are respectively arranged on both sides of the bridge pier. The top beams of the two horizontal trolleys (11) are fastened together by bolts to form an integral body. The two horizontal trolleys (11) share a hydraulic turntable (13). The lifting mechanism and the measuring plate (33) are made of lightweight materials.

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