Self-balancing bridge pile foundation bearing capacity detection equipment

Abstract

The utility model provides equipment for detecting the bearing capacity of a self-balancing bridge pile foundation, and belongs to the field of bridge detection. Comprising an upper connecting plate, a lower connecting plate, a displacement rod and a displacement rod sleeve, wherein the displacement rod is fixedly connected to the lower connecting plate and penetrates through the upper connecting plate; the displacement rod sleeve is fixedly connected to the upper connecting plate and sleeves the displacement rod; the loading device is arranged between the upper connecting plate and the lower connecting plate; and the hydraulic oil pipe is fixed on the upper connecting plate and is used for conveying oil to the loading device. According to the self-balancing bridge pile foundation bearing capacity detection equipment, the stability maintaining mechanism between the upper connecting plate and the lower connecting plate can resist horizontal stress, the test accuracy is guaranteed, the center cylinder and the fixing base are slidably connected and connected through the second reinforcing rod, the structural strength is improved, horizontal displacement of the center cylinder in the lifting process is limited, and the bearing capacity of the self-balancing bridge pile foundation is improved. Accurate measurement results are guaranteed, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the field of bridge detection, in particular to a self-balancing bridge pile foundation bearing capacity detection device. Background Art

[0002] Through bridge inspection, we can ensure the safe use of bridges, discover bridge diseases and abnormal phenomena early, provide a scientific basis for bridge maintenance, and take reasonable maintenance and reinforcement methods in a timely manner to extend the service life of bridges, improve their bearing capacity, reduce bridge maintenance costs, or demolish and rebuild them.

[0003] The Chinese utility model patent with the publication number CN214574196U discloses a new type of self-balancing detection load box for pile foundations, in which the outer casing of the lower displacement rod between the top plate and the bottom plate of the load box is composed of multiple casings, and the channel formed by the outer casing of the lower displacement rod is used as a grouting channel. The utility model solves the problem that the tensile effect of the outer casing of the lower displacement rod between the top plate and the bottom plate affects the detection result during the self-balancing detection and the grouting channel is easily blocked after the detection. At the same time, the outer casing of the lower displacement rod is used as a grouting channel, which can reduce the number of pipes connected to the load box, thereby reducing the influence of the pipes on the bearing capacity of the pile foundation; in addition, by reserving a spare oil pipe, it is prevented that the oil pipe bursts due to excessive hydraulic pressure during the detection, making it impossible to conduct the detection test.

[0004] When the above-mentioned new type of self-balancing pile foundation detection load box is lifted by the hydraulic cylinder, it will be unable to resist the horizontal stress due to the multi-layer casing. When it is subjected to a large load, horizontal displacement will occur, causing the pile foundation to be misaligned up and down, affecting the measurement results and posing a safety hazard.

[0005] Therefore, a self-balancing bridge pile foundation bearing capacity detection device is provided to solve the above problems. Utility Model Content

[0006] The utility model provides a self-balancing bridge pile foundation bearing capacity detection device, aiming to solve the problems of measurement deviation and potential safety hazards caused by poor resistance to horizontal stress in the existing pile foundation bearing capacity detection device mentioned in the background technology.

[0007] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0008] A self-balancing bridge pile foundation bearing capacity detection device is provided, comprising an upper connecting plate, a lower connecting plate, a displacement rod fixedly connected to the lower connecting plate and penetrating the upper connecting plate, a displacement rod sleeve fixedly connected to the upper connecting plate and sleeved on the outside of the displacement rod, a loading device arranged between the upper connecting plate and the lower connecting plate, and a hydraulic oil pipe fixed to the upper connecting plate for supplying oil to the loading device, wherein a pouring hole is opened at the center of the upper connecting plate and the lower connecting plate.

[0009] In order to counteract the horizontal stress generated between the upper connecting plate and the lower connecting plate during loading, a stabilization mechanism for resisting horizontal stress is arranged between the upper connecting plate and the lower connecting plate, and the stabilization mechanism includes a central tube fixedly connected to the center of one side of the upper connecting plate close to the lower connecting plate, at least three fixing seats fixedly connected to the central position of one side of the lower connecting plate close to the upper connecting plate and distributed in a circular array, and a second reinforcing rod fixedly connected between two adjacent fixing seats; wherein the fixing seats are all slidably connected to the outer wall of the central tube; therefore, when the upper connecting plate and the lower connecting plate are moved away from each other by the loading device, they can be limited by the sliding of the central tube and the fixing seat, thereby resisting horizontal stress, preventing displacement, ensuring accurate measurement results, and avoiding safety hazards.

[0010] In order to facilitate grouting, a secondary pouring pipe for secondary pouring and grouting is fixedly connected to a side of the upper connecting plate away from the lower connecting plate.

[0011] Preferably, in order to prevent side leakage during the first pouring, one end of the central tube close to the lower connecting plate passes through the pouring hole of the lower connecting plate and this end surface is parallel to a surface of the lower connecting plate away from the upper connecting plate.

[0012] Preferably, in order to reduce the contact between the pouring material and the jacks during grouting and facilitate maintenance and recovery, the loading device includes at least three jacks fixedly mounted on one side of the lower connecting plate close to the upper connecting plate and distributed in a circular array, a support tube fixedly mounted on the lower connecting plate and sleeved on the outside of the jacks, and a first reinforcing rod fixedly connected between two adjacent support tubes.

[0013] Preferably, in order to bear the load after the upper connecting plate is retracted during recovery, one end of the support tube close to the upper connecting plate contacts a surface of the upper connecting plate close to the lower connecting plate.

[0014] Preferably, in order to resist the torque between the central tube and the fixed seat, a sliding groove is provided on a side of the fixed seat close to the central tube, and a sliding block is fixedly connected to the outer wall of the central tube at a position corresponding to the sliding groove.

[0015] Preferably, in order to ensure complete filling during secondary pouring, secondary pouring pipes are fixedly installed at positions corresponding to gaps between two adjacent jacks on one side of the upper connecting plate away from the lower connecting plate.

[0016] The beneficial effects of the utility model are:

[0017] The self-balancing bridge pile foundation bearing capacity testing equipment has a stabilizing mechanism between the upper connecting plate and the lower connecting plate that can resist horizontal stress and ensure the accuracy of the test. The center tube is slidably connected to the fixed seat and is connected through a second reinforcing rod, which improves the structural strength and limits the horizontal displacement of the center tube during the lifting process, thereby ensuring accurate measurement results and avoiding safety hazards.

[0018] The self-balancing bridge pile foundation bearing capacity testing equipment uses multiple secondary pouring pipes to perform multi-point pouring on the space between the upper connecting plate and the lower connecting plate, making the pouring more uniform and easier to fill the gap, thereby improving the accuracy of pile foundation bearing capacity data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a self-balancing bridge pile foundation bearing capacity detection device;

[0020] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of a self-balancing bridge pile foundation bearing capacity detection device;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0022] In the figure:

[0023] 1. Upper connecting plate; 11. Hydraulic oil pipe; 12. Displacement rod casing; 13. Secondary pouring pipe; 2. Lower connecting plate; 21. Displacement rod;

[0024] 3. Loading device;

[0025] 31. Jack; 32. Support tube; 33. First reinforcement rod;

[0026] 4. Stability maintenance agencies;

[0027] 41. center tube; 411. slide block; 42. fixed seat; 421. slide groove; 43. second reinforcing rod;

[0028] 5. Watering hole. DETAILED DESCRIPTION

[0029] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0030] Example 1

[0031] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a technical solution: a self-balancing bridge pile foundation bearing capacity detection device, including an upper connecting plate 1, a lower connecting plate 2, a displacement rod 21 fixedly connected to the lower connecting plate 2 and penetrating the upper connecting plate 1, a displacement rod sleeve 12 fixedly connected to the upper connecting plate 1 and sleeved on the outside of the displacement rod 21, a loading device 3 arranged between the upper connecting plate 1 and the lower connecting plate 2, and a hydraulic oil pipe 11 fixed on the upper connecting plate 1 for supplying oil to the loading device 3, wherein a pouring hole 5 is opened at the center of the upper connecting plate 1 and the lower connecting plate 2, and a secondary pouring pipe 13 for secondary pouring and caulking is fixedly connected to the side of the upper connecting plate 1 away from the lower connecting plate 2.

[0032] A stabilization mechanism 4 for resisting horizontal stress is arranged between the upper connecting plate 1 and the lower connecting plate 2, and the stabilization mechanism 4 includes a center tube 41 fixedly connected to the center of one side of the upper connecting plate 1 close to the lower connecting plate 2, at least three fixed seats 42 fixedly connected to the central position of one side of the lower connecting plate 2 close to the upper connecting plate 1 and distributed in a circular array, and a second reinforcing rod 43 fixedly connected between two adjacent fixed seats 42; wherein, the fixed seats 42 are all slidably connected to the outer wall of the center tube 41, and one end of the center tube 41 close to the lower connecting plate 2 passes through the pouring hole 5 of the lower connecting plate 2 and this end face is parallel to the side of the lower connecting plate 2 away from the upper connecting plate 1.

[0033] The basic principle of the self-balancing bridge pile foundation bearing capacity detection equipment in this embodiment is as follows: when in use, the upper connecting plate 1 is welded to the bottom end of the upper steel cage, and the lower connecting plate 2 is welded to the top end of the lower steel cage. Then, the extension pipe is connected to the hydraulic oil pipe 11, the displacement rod sleeve 12, the secondary pouring pipe 13 and the end of the displacement rod 21 and left on the ground. The loading device 3 is electrically connected to the ground measuring device to collect load data. Then, the pile foundation can be poured, and the pouring material is filled in the upper steel cage. The pouring material flows into the lower steel cage through the pouring hole 5 and the inner circle gap of the center tube 41, thereby completing the initial filling to form the pile foundation. After waiting for solidification and forming, oil is injected through the hydraulic oil pipe 11 to allow the loading device 3 to connect the upper connecting plate 1 and The lower connecting plate 2 pushes them away from each other, and the pile foundation is divided into two sections, upper and lower. During the process, the upper connecting plate 1 drives the center tube 41 to rise. Since the center tube 41 is slidably connected with the fixed seat 42, and the fixed seats 42 are connected to form a ring through the second reinforcing rod 43, the structural strength is improved, and the horizontal displacement of the center tube 41 during the lifting process is limited, thereby resisting the influence of horizontal stress. After that, secondary pouring is performed through the secondary pouring pipe 13 to fill the fracture interval, and it can be finalized again. During this period, the displacement difference between the displacement rod 21 and the displacement rod sleeve 12 is used as the data of the moving distance. The ground measuring device collects the load data of the loading device 3 through the sensor, and then the bearing capacity result of this pile foundation is obtained by calculation.

[0034] Furthermore, the loading device 3 includes at least three jacks 31 fixedly mounted on one side of the lower connecting plate 2 close to the upper connecting plate 1 and distributed in a circular array, a support tube 32 fixedly mounted on the lower connecting plate 2 and sleeved on the outside of the jack 31, and a first reinforcing rod 33 fixedly connected between two adjacent support tubes 32; by arranging the support tube 32 outside the jack 31 to isolate the jack 31, the contact between the outer wall of the jack 31 and the pouring material during the secondary pouring is reduced, which makes it easier to maintain and can also extend the service life of the equipment.

[0035] It should be noted that one end of the support tube 32 close to the upper connecting plate 1 is in contact with a side of the upper connecting plate 1 close to the lower connecting plate 2; during the initial pouring, it replaces the jack 31 to support the upper section of the pile foundation, protecting the jack from contacting the upper connecting plate 1 before loading, thereby ensuring a smooth loading process and accurate load force collection data.

[0036] Furthermore, a slide groove 421 is provided on one side of the fixed seat 42 close to the central tube 41, and a slider 411 is fixedly connected to the outer wall of the central tube 41 at a position corresponding to the slide groove 421; the slider 411 and the slide groove 421 resist the torque when the central tube 41 is displaced, further ensuring the stability when the pile foundation is separated, which helps to improve the accuracy of the collected data.

[0037] Example 2

[0038] What is different from the first embodiment is that a secondary irrigation pipe 13 is fixedly installed at a position corresponding to the gap between two adjacent jacks 31 on a side of the upper connecting plate 1 away from the lower connecting plate 2 .

[0039] The basic principle of the self-balancing bridge pile foundation bearing capacity detection equipment in this embodiment is: the space between the upper connecting plate 1 and the lower connecting plate 2 is filled and poured through multiple secondary pouring pipes 13 to achieve multi-point pouring, which makes the pouring more uniform and makes it easier to fill the gaps, thereby improving the accuracy of pile foundation bearing capacity data collection.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-balancing bridge pile foundation bearing capacity detection device, comprising an upper connecting plate (1), a lower connecting plate (2), a displacement rod (21) fixedly connected to the lower connecting plate (2) and penetrating the upper connecting plate (1), a displacement rod sleeve (12) fixedly connected to the upper connecting plate (1) and sleeved on the outside of the displacement rod (21), a loading device (3) arranged between the upper connecting plate (1) and the lower connecting plate (2), and a hydraulic oil pipe (11) fixed to the upper connecting plate (1) for supplying oil to the loading device (3), in, A pouring hole (5) is provided at the center of the upper connecting plate (1) and the lower connecting plate (2), and is characterized in that a stabilizing mechanism (4) for resisting horizontal stress is provided between the upper connecting plate (1) and the lower connecting plate (2); The stabilizing mechanism (4) comprises a central tube (41) fixedly connected to the center of one side of the upper connecting plate (1) close to the lower connecting plate (2), at least three fixing seats (42) fixedly connected to the center of one side of the lower connecting plate (2) close to the upper connecting plate (1) and distributed in a circular array, and a second reinforcing rod (43) fixedly connected between two adjacent fixing seats (42); wherein the fixing seats (42) are all slidably connected to the outer wall of the central tube (41); A secondary pouring pipe (13) for secondary pouring and filling seams is fixedly connected to a surface of the upper connecting plate (1) away from the lower connecting plate (2).

2. A self-balancing bridge pile foundation bearing capacity detection device according to claim 1, Features: One end of the central tube (41) close to the lower connecting plate (2) passes through the pouring hole (5) of the lower connecting plate (2), and this end surface is parallel to a surface of the lower connecting plate (2) away from the upper connecting plate (1).

3. A self-balancing bridge pile foundation bearing capacity detection device according to claim 2, Features: The loading device (3) comprises at least three jacks (31) fixedly mounted on one side of the lower connecting plate (2) close to the upper connecting plate (1) and distributed in a circular array, a support tube (32) fixedly mounted on the lower connecting plate (2) and sleeved on the outside of the jacks (31), and a first reinforcing rod (33) fixedly connected between two adjacent support tubes (32).

4. A self-balancing bridge pile foundation bearing capacity detection device according to claim 3, Features: One end of the support tube (32) close to the upper connecting plate (1) contacts a surface of the upper connecting plate (1) close to the lower connecting plate (2).

5. A self-balancing bridge pile foundation bearing capacity detection device according to claim 4, Features: A sliding groove (421) is provided on one side of the fixing seat (42) close to the central tube (41), and a sliding block (411) is fixedly connected to a position on the outer wall of the central tube (41) corresponding to the sliding groove (421).

6. A self-balancing bridge pile foundation bearing capacity detection device according to claim 5, Features: A secondary irrigation pipe (13) is fixedly installed at a position corresponding to the gap between two adjacent jacks (31) on one side of the upper connecting plate (1) away from the lower connecting plate (2).

Images