Pile foundation pulling resistance detection device

Abstract

The utility model relates to the technical field of pile foundation performance detection, and discloses a pile foundation anti-pulling performance detection device which comprises jacks, the output ends of the jacks are connected with counter-force beams, the bottom ends of the jacks are connected with supporting seats, the number of the jacks is two, the jacks are arranged on the two sides of the supporting seats respectively, and the two sides of the bottom ends of the supporting seats are oppositely connected with bearing seats respectively. A connecting rod is connected to the middle of the bottom end of the counter-force beam and penetrates through the supporting base, and a connector is connected to the other end of the connecting rod. The connector comprises a connecting plate connected with the connecting rod, a plurality of through holes are evenly distributed and connected in the circumferential direction of the connecting plate, and limiting assemblies capable of rapidly limiting the reinforcing steel bars are connected to the positions, at the through holes, of the connecting plate. Compared with the prior art, the stress balance detection device has the advantages of being more accurate in stress balance detection result, convenient to quickly and stably install, convenient to improve the detection efficiency, convenient to reuse and capable of reducing the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation performance detection, in particular to a pile foundation anti-pulling performance detection device. Background Art

[0002] Pile foundation is an important supporting part of buildings or other structures. Its pull-out resistance is crucial to the stability and safety of the structure. The pile foundation pull-out resistance test device is a device used to test the pull-out resistance of the pile foundation. It is mainly used to test the bearing capacity, deformation characteristics and other performance indicators of the pile foundation when subjected to pull-out force, providing a basis for engineering design and construction.

[0003] The main structure of the existing pile foundation pull-out performance testing device includes jacks, reaction beams and other components. The steel bars extending from the pile foundation cast by the steel cage are welded to the two ends of the U-shaped connecting steel sleeved on the reaction beam, or the steel bars of the pile foundation are directly welded to the reaction beam, and then the jack is started to apply an upward pull-out force to the pile foundation through the reaction beam to test the pull-out performance of the pile foundation. However, it was found in practice that since there is usually only one jack, if the force on both sides of the jack is uneven, it will affect the pile foundation pull-out test results; in addition, since the steel bars on the pile foundation are connected to the reaction beam by welding, the operation is more troublesome and time-consuming, which reduces the detection efficiency, and it cannot be reused after being dismantled. Utility Model Content

[0004] The utility model provides a pile foundation pull-out resistance detection device to solve the problems that uneven force on a reaction beam affects the detection result, the installation is troublesome and time-consuming, the efficiency is reduced, and the device cannot be reused.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a pile foundation pull-out performance detection device, including a jack, the output end of the jack is connected to a reaction beam, the bottom end of the jack is connected to a support seat, there are two jacks and they are arranged on both sides of the support seat, the two sides of the bottom end of the support seat are respectively connected to bearing seats, a connecting rod is connected to the middle part of the bottom end of the reaction beam, the connecting rod passes through the support seat and is connected to a connector at the other end; the connector includes a connecting plate connected to the connecting rod, the connecting plate is circumferentially evenly connected with a plurality of through holes, and the connecting plate is connected to a limit assembly at the through hole that can quickly limit the steel bar.

[0006] Furthermore, the limiting assembly includes a plurality of claws evenly connected to the circumference of the top end of the through hole, and a gap is provided between adjacent claws. A threaded cylinder is provided on the outside of the claw through a threaded connection, and a limiting protrusion is connected to the inner side of the free end of the claw. The claw is made of a flexible material. When the steel bar passes through, the free end of the claw is driven to open. When the steel bar needs to be positioned after passing through, the threaded cylinder is rotated. The threaded cylinder is rotated upward through the threaded connection with the circumference of the claw, thereby facilitating the limiting of the free end of the claw. The claw cooperates with the steel bar for limiting through the limiting protrusion.

[0007] Furthermore, the limiting protrusion is a triangular block structure or an arc-shaped protrusion structure, so that the steel bar can pass through freely when the claw is not limited; when the claw is limited, the triangular block-shaped limiting protrusion is more easily embedded in the steel bar, increasing the contact area between the claw and the steel bar and thus improving the stability of the limitation.

[0008] Furthermore, the outer wall of the threaded barrel is connected with anti-skid patterns, and the threaded barrel is conveniently driven by the anti-skid patterns.

[0009] Furthermore, there are two connecting rods symmetrically distributed around the axis of the connecting plate, and guide holes are relatively connected on the support seat. The guide holes are slidably matched with the connecting rods to facilitate the stable lifting and lowering of the connecting plate and avoid the connecting plate from tilting during the pull-out test and affecting the accuracy of the test results.

[0010] Furthermore, reinforcing ribs are provided at the joints between the bearing seat and the supporting seat, and the supporting strength of the supporting plate can be improved by cooperating with the reinforcing ribs.

[0011] The advantages of the utility model compared with the prior art are:

[0012] Through the coordinated arrangement of the jack, reaction beam, support seat, bearing seat, connecting rod, connector, connecting plate, through hole and limiting assembly, the reaction beam and the connecting plate can be stably raised to avoid the pile foundation from tilting due to uneven force during pile pulling; and after aligning the center of the device with the center of the pile foundation, the steel bars at the top of the pile foundation are passed through the through holes in turn, and then the limiting assembly is used to quickly limit and lock them, thereby avoiding the time waste caused by welding the steel bars to the reaction beam in turn, thereby improving the detection efficiency; at the same time, the limiting assembly is convenient for temporary limiting and disassembly of the steel bars, which is convenient for the reuse of the device and cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic structural diagram of a pile foundation pull-out resistance detection device from a top view.

[0014] Figure 2 The utility model is a structural schematic diagram of a pile foundation anti-pulling performance detection device from an upward viewing angle.

[0015] Figure 3 The utility model is a schematic diagram of the main cross-sectional structure of a pile foundation anti-pulling performance testing device.

[0016] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of A.

[0017] As shown in the figure: 1. Jack, 2. Reaction beam, 3. Support seat, 4. Bearing seat, 5. Connecting rod, 6. Connector, 7. Connecting plate, 8. Through hole, 9. Claw, 10. Gap, 11. Threaded cylinder, 12. Limiting protrusion, 13. Guide hole, 14. Reinforcing rib. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Combined with Figure 1 , Figure 2 and Figure 3 A pile foundation pull-out performance detection device comprises a jack 1, a reaction beam 2 is connected to the output end of the jack 1, a support seat 3 is connected to the bottom end of the jack 1, there are two jacks 1 and they are arranged on both sides of the support seat 3, bearing seats 4 are connected to both sides of the bottom end of the support seat 3, reinforcing ribs 14 are connected to the joints of the bearing seat 4 and the support seat 3, a connecting rod 5 is connected to the middle part of the bottom end of the reaction beam 2, the connecting rod 5 passes through the support seat 3 and is connected to a connector 6 at the other end, there are two connecting rods 5 and they are symmetrically distributed around the axis of the connecting plate 7, guide holes 13 are connected to the support seat 3, and the guide holes 13 are slidably matched with the connecting rod 5.

[0020] Through the coordinated arrangement of the jack 1, reaction beam 2, support seat 3, bearing seat 4, connecting rod 5 and connector 6 in the above structure, the reaction beam 2 and the connecting plate 7 can be stably raised, avoiding the inclination of the pile foundation due to uneven force during the pile pulling process.

[0021] Combined with Figure 3 and Figure 4The connector 6 includes a connecting plate 7 connected to the connecting rod 5. The connecting plate 7 is evenly connected with a plurality of through holes 8 in the circumferential direction. The connecting plate 7 is connected with a limiting assembly at the through hole 8 for quickly limiting the steel bar. The limiting assembly includes a plurality of claws 9 evenly connected to the top of the through hole 8 in the circumferential direction. The claws 9 are made of a flexible material, such as a rubber material. The same gap 10 is set between adjacent claws 9. The claws 9 are connected with a threaded barrel 11 through a threaded connection. The outer wall of the threaded barrel 11 is connected with anti-slip grooves. The inner side of the free end of the claw 9 is connected with a limiting protrusion 12. Preferably, the limiting protrusion 12 is a triangular block structure. In another preferred embodiment, the limiting protrusion 12 is an arc-shaped protrusion structure. In order to achieve stable clamping, the number of claws in a limiting assembly can be set to 3, 4 or 5.

[0022] The coordinated arrangement of the connector 6, the connecting plate 7, the through hole 8 and the limiting assembly in the above structure facilitates the rapid disassembly and assembly of the steel bars, thereby improving the detection efficiency of the pull-out test.

[0023] The specific usage is as follows:

[0024] First, align the center of the device with the center of the pile foundation, and then pass the steel bars at the top of the pile foundation through the through holes 8 in turn. The claws 9 are made of flexible material. When the steel bars pass through, the free ends of the claws 9 are driven to open. The limiting protrusions 12 are triangular block structures or arc-shaped protrusion structures, so that when the claws 9 are not limited, the steel bars can pass through freely. When the steel bars need to be positioned after passing through, the limiting components are driven to limit and lock them quickly. By rotating the threaded barrel 11, the anti-slip pattern is set to facilitate the driving of the threaded barrel 11. The threaded barrel 11 is connected to the circumferential thread of the claws 9. Then it rotates upward, which makes it easier to limit the free end of the claw 9. When the claw 9 is limited, the limiting protrusion 12 (especially the limiting protrusion 12 with a triangular block structure) is more easily embedded in the steel bar, thereby increasing the contact area between the claw 9 and the steel bar and thus improving the stability of the limitation. The claw 9 is limited by the limiting protrusion 12 and the steel bar, thereby avoiding the time waste caused by the need to weld the steel bar to the reaction beam 2 in turn, thereby improving the detection efficiency. At the same time, the limiting component facilitates the temporary limiting and disassembly of the steel bar, facilitates the reuse of the device, and facilitates cost savings.

[0025] By starting the jack 1, the jack 1 drives the reaction beam 2 to rise, and the reaction beam 2 drives the pile foundation to be pulled out through the connector 6, thereby testing the pull-out resistance of the detector. The guide hole 13 and the connecting rod 5 are slidably matched to facilitate the stable lifting and lowering of the connecting plate 7, thereby preventing the connecting plate 7 from tilting during the pull-out test and affecting the accuracy of the test results. The coordinated setting of the reinforcing ribs 14 facilitates the improvement of the supporting strength of the support plate, thereby facilitating the stable support of the jack 1.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0028] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A pile foundation pull-out performance testing device, comprising a jack (1), wherein the output end of the jack (1) is connected to a reaction beam (2), and is characterized in that: The bottom end of the jack (1) is connected to a support seat (3), the jack (1) is in two pieces and is disposed on both sides of the support seat (3), the two sides of the bottom end of the support seat (3) are respectively connected to bearing seats (4), the middle part of the bottom end of the reaction beam (2) is connected to a connecting rod (5), the connecting rod (5) passes through the support seat (3) and is connected to a connector (6) at the other end; The connector (6) comprises a connecting plate (7) connected to a connecting rod (5), the connecting plate (7) being provided with a plurality of through holes (8) evenly distributed in the circumferential direction, and the connecting plate (7) being provided with a limiting component at the through holes (8) that can quickly limit the position of the steel bars.

2. A pile foundation pull-out performance testing device according to claim 1, characterized in that: The limiting assembly comprises a plurality of claws (9) uniformly connected to the top circumference of the through hole (8), a gap (10) is provided between adjacent claws (9), a threaded tube (11) is provided on the outside of the claw (9) through a threaded connection, and a limiting protrusion (12) is connected to the inner side of the free end of the claw (9).

3. A pile foundation pull-out performance testing device according to claim 2, characterized in that: The limiting protrusion (12) is a triangular block structure or an arc-shaped protrusion structure.

4. A pile foundation pull-out performance testing device according to claim 2, characterized in that: The outer wall of the threaded cylinder (11) is connected with anti-slip grooves.

5. A pile foundation pull-out performance testing device according to claim 1, characterized in that: The connecting rods (5) are two and are symmetrically distributed about the axis of the connecting plate (7). The supporting seat (3) is provided with guide holes (13) which are relatively connected and the guide holes (13) are slidably matched with the connecting rods (5).

6. A pile foundation pull-out performance testing device according to claim 1, characterized in that: A reinforcing rib (14) is provided at the joint between the bearing seat (4) and the supporting seat (3).

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