Single-pile vertical anti-pulling testing device
By introducing support components and reaction components in the single pile pull-out test and connecting them with all pile steel bars with clamps, the problem of unbalanced pulling force of foundation piles is solved, and more reliable test results are achieved.
Patent Information
- Application Number
- CN202421911008.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In the existing single pile pull-up test, the pulling force of the foundation pile is unbalanced, resulting in unreliable test results.
Support components and reaction components are adopted, which include cross beams, jacks and cushions. The reaction components include conversion columns, clamping plates, adapter seats, roof plates and connecting columns. They are connected to all pile steel bars through clamping plates. The thrust of the jack is converted into pulling force to ensure that the pulling force of the foundation pile is evenly distributed.
The pulling force balance of the foundation pile is achieved, and the reliability and data accuracy of the tensile resistance test are improved.
Smart Images
Figure CN223061659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of single pile detection, in particular to a single pile vertical uplift test device. Background Technique
[0002] Single pile uplift test is a test method used to evaluate the ability of a single foundation pile to withstand uplift force in the vertical direction. This test is very important for determining the bearing capacity of the pile foundation when bearing uplift loads and is an important test method for determining the engineering quality.
[0003] As Figure 4 shown, it is a common single pile uplift test structure. The foundation pile 20 includes a pile body 21 and several pile body steel bars 22 distributed in a circle. Two cushion blocks 23 are used to support a cross beam 24. The cross beam 24 spans above the pile body 21. Then, after extending some of the pile body steel bars 22 on both sides of the cross beam 24 through welding auxiliary steel bars 25, they are connected to a jack 26 located above the cross beam 24. In this way, as the output shaft of the jack 26 pushes upwards, the auxiliary steel bars 25 pull some of the pile body steel bars 22, thereby conducting an uplift test on the foundation pile.
[0004] However, the existing such uplift test has the following deficiencies: Some of the pile body steel bars 22 located below the projection of the cross beam 24 are blocked by the cross beam 24. Therefore, this part of the pile body steel bars 22 cannot extend to the jack 26. Only the pile body steel bars 22 on both sides of the cross beam 24 can extend through the auxiliary steel bars 25 to be connected to the jack 26. In this way, it will cause the uplift forces received by the foundation pile 20 to be unbalanced. In view of this, in order to solve the above deficiencies, the single pile vertical uplift test device of the present application is proposed. Content of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a single pile vertical uplift test device that ensures the balance of the uplift force of the foundation pile and improves the reliability of the tensile uplift test.
[0006] The purpose of the utility model is achieved by the following technical solutions:
[0007] A single pile vertical uplift test device for testing the tensile uplift force of a foundation pile, the foundation pile including a pile body and several pile body steel bars, includes:
[0008] A support assembly, the support assembly including a cross beam, a jack, and two cushion blocks. The two cushion blocks are arranged on both sides of the foundation pile. The two ends of the cross beam are arranged on the two cushion blocks, and the jack is arranged on the cross beam; and
[0009] Reaction force assembly, the reaction force assembly includes a conversion column, a clamping plate, a transfer seat, a top plate and a plurality of connecting columns. The top plate is arranged on the jack. The conversion column is arranged at the top of the pile body. The clamping plate is sleeved on the conversion column, and each pile body steel bar is respectively clamped with the four sides of the clamping plate. The transfer seat is arranged at the top of the conversion column and is located below the cross beam. One end of each connecting column is clamped with the transfer seat, and the other end of each connecting column is clamped with the top plate. And each connecting column is divided into two groups, and the two groups of connecting columns are respectively located on both sides of the cross beam.
[0010] Optionally, the top surface of the cushion seat is higher than the top surface of the transfer seat.
[0011] Optionally, a perforation is formed at the axis of the clamping plate to enable the conversion column to pass through the perforation.
[0012] Optionally, a plurality of clamping grooves are formed on the outer peripheral wall of the clamping plate, and the clamping grooves are equally angularly distributed, and each pile body steel bar is respectively clamped with each clamping groove.
[0013] Optionally, the reaction force assembly further includes a plurality of clamping sleeves, each clamping sleeve is welded to each pile body steel bar, and each clamping sleeve abuts against the top surface of the clamping plate.
[0014] Optionally, there are a plurality of clamping plates, and each clamping plate is stacked layer by layer from bottom to top in increasing diameter, so that the lowermost clamping plate is clamped with the conversion column, and the uppermost clamping plate abuts against the clamping sleeve.
[0015] Optionally, a clamping platform is arranged at the bottom end of the conversion column, the diameter of the clamping platform is larger than the diameter of the perforation, and the clamping platform abuts against the pile body.
[0016] Optionally, a plurality of locking columns are arranged at one end of the conversion column away from the clamping platform, a plurality of locking holes are formed on the transfer seat, and each locking column is used to pass through each locking hole and then be screwed with a first nut to fix the transfer seat and the conversion column.
[0017] Optionally, the transfer seat includes an integrally formed shaft column, a circular plate and a square plate. The two ends of the shaft column are respectively connected to the circular plate and the square plate, and each locking hole is located on the circular plate.
[0018] Optionally, one end of the connecting column is provided with a column head, and the other end is used for screwing a second nut, so that one of the column head and the second nut abuts against the top plate, and the other abuts against the square plate.
[0019] Compared with the prior art, the utility model has at least the following advantages:
[0020] The single-pile vertical uplift test device of the present application uses a reaction force component to convert the thrust of the jack into the pulling force acting on the foundation pile. Among them, the clamping plate can be connected to all pile body steel bars. Compared with the existing test structure that can only pull some pile body steel bars, it can avoid the situation of tensile imbalance during the uplift of the foundation pile. Therefore, the uplift test data can be made more reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0022] Figure 1 Schematic structural diagram of the single-pile vertical uplift test device according to an embodiment of the present invention;
[0023] Figure 2 is Figure 1 Schematic partial cross-sectional structural diagram of the single-pile vertical uplift test device shown;
[0024] Figure 3 Schematic structural diagram of the clamping plate according to an embodiment of the present invention;
[0025] Figure 4 Schematic structural diagram of the single-pile uplift test structure of the prior art.
[0026] Description of the reference numerals:
[0027] 20, foundation pile; 21, pile body; 22, pile body steel bar; 23, cushion seat; 24, cross beam; 25, auxiliary steel bar; 26, jack; 10, single-pile vertical uplift test device; 100, support component; 200, reaction force component; 210, conversion column; 220, clamping plate; 230, adapter seat; 240, top plate; 250, connecting column; 221, through hole; 222, card slot; 260, card sleeve; 270, card table; 280, locking column; 291, first nut; 231, shaft column; 232, circular plate; 233, square plate; 251, column head; 252, second nut. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings.
[0029] Such as Figure 1 and Figure 2As shown in the figure, a single-pile vertical uplift test device 10 is used to test the tensile force of a foundation pile 20. The foundation pile 20 includes a pile body 21 and several pile body steel bars 22. The single-pile vertical uplift test device 10 includes a support assembly 100 and a reaction force assembly 200. The support assembly 100 includes a cross beam 24, a jack 26 and two cushion blocks 23. The two cushion blocks 23 are arranged on both sides of the foundation pile 20. The two ends of the cross beam 24 are arranged on the two cushion blocks 23. The jack 26 is arranged on the cross beam 24. The reaction force assembly 200 includes a conversion column 210, a clamping plate 220, an adapter seat 230, a top plate 240 and several connecting columns 250. The top plate 240 is arranged on the jack 26. The conversion column 210 is arranged on the top of the pile body 21. The clamping plate 220 is sleeved on the conversion column 210, and each pile body steel bar 22 is respectively clamped with the periphery of the clamping plate 220. The adapter seat 230 is arranged on the top of the conversion column 210, and the adapter seat 230 is located below the cross beam 24. One end of each connecting column 250 is respectively clamped with the adapter seat 230, and the other end of each connecting column 250 is respectively clamped with the top plate 240, and each connecting column 250 is divided into two groups, and the two groups of connecting columns 250 are respectively located on both sides of the cross beam 24.
[0030] It should be noted that the cushion block 23 can be a concrete structure. The two cushion blocks 23 are respectively placed on the opposite sides of the foundation pile 20. The two ends of the cross beam 24 are respectively supported by the two cushion blocks 23, and the jack 26 is placed above the cross beam 24. Further, the conversion column 210 is placed at the central position of the pile body 21, wherein the pile body steel bars 22 are respectively located around the conversion column 210. The clamping plate 220 is sleeved on the conversion column 210, and then the pile body steel bars 22 are respectively clamped and fixed with the periphery of the clamping plate 220. Then the adapter seat 230 is fixed on the top of the conversion column 210, and finally the two ends of each connecting column 250 are respectively clamped and fixed with the adapter seat 230 and the top plate 240 placed on the top of the jack 26. In this way, the reaction force assembly 200 converts the thrust of the jack 26 into the uplift force acting on the foundation pile 20. Among them, the clamping plate 220 can be connected to all the pile body steel bars 22. Compared with the existing test structure that can only pull and test some of the pile body steel bars 22, it can avoid the situation of tensile force imbalance when the foundation pile 20 is pulled. Therefore, the pull test data can be made more reliable.
[0031] In one embodiment, the top surface of the cushion block 23 is higher than the top surface of the adapter seat 230. In this way, it is ensured that there is a non-contact state between the cross beam 24 and the adapter seat 230.
[0032] As Figure 3 shown, in one embodiment, a perforation 221 is provided at the axis of the clamping plate 220 to enable the conversion column 210 to pass through the perforation 221. In this way, the conversion column 210 passes through the perforation 221 from bottom to top, so that the clamping plate 220 is clamped and fixed with the conversion column 210.
[0033] AsFigures 1 to 3 As shown, in one embodiment, a plurality of card slots 222 are formed on the outer peripheral wall of the card plate 220, and the card slots 222 are equally angularly distributed, and each pile body steel bar 22 is respectively clamped with each card slot 222.
[0034] Specifically, the card slots 222 are equally angularly distributed on the outer side wall of the card plate 220. In one embodiment, the number of the card slots 222 is determined according to the pile body steel bars 22 of the foundation pile 20 to ensure that each pile body steel bar 22 passes through a card slot 222 for clamping and fixing. It should be noted that the card plate 220 and the transfer column 210 are detachably installed structures. Therefore, the card plate 220 can be designed in multiple styles according to the actual size of the foundation pile 20, and then a specific card plate 220 is selected according to the actual diameter of the pile body 21 and the actual number of the pile body steel bars 22. In this way, it is ensured that each pile body steel bar 22 of the foundation pile 20 to be tested is tightly clamped with the card plate 220. Thus, when a pulling force is applied to the transfer column 210, it is equivalent to conducting a pull-out test on the foundation pile 20.
[0035] As Figure 1 and Figure 2 shown, in one embodiment, the reaction force assembly 200 further includes a plurality of card sleeves 260. Each card sleeve 260 is welded to each pile body steel bar 22, and each card sleeve 260 abuts against the top surface of the card plate 220.
[0036] It should be noted that in order to tightly clamp and fix the pile body steel bar 22 with the card plate 220, after the card sleeve 260 is sleeved on the pile body steel bar 22, the card sleeve 260 is welded and fixed to the pile body steel bar 22. The diameter of the card sleeve 260 is larger than the inner diameter of the card slot 222. In this way, the pile body steel bar 22 is tightly clamped and fixed with the card plate 220.
[0037] In one embodiment, a plurality of card plates 220 are provided. Each card plate 220 is stacked layer by layer from bottom to top in increasing diameter, so that the lowermost card plate 220 is clamped with the transfer column 210, and the uppermost card plate 220 abuts against the card sleeve 260.
[0038] It should be noted that for the foundation pile 20 whose diameter dimension of the pile body 21 is 40% or more larger than the diameter dimension of the transfer column 210, it means that the distance between the pile body steel bar 22 and the transfer column 210 is relatively far. Therefore, a larger diameter of the card plate 220 is required. However, the contact area between the transfer column 210 and the card plate 220 remains unchanged. Therefore, if the diameter of the card plate 220 is too large, it is easy to cause the card plate 220 to be deformed under force during the pull-out test. Therefore, in order to avoid the above problems of the card plate 220, a plurality of card plates 220 are stacked from bottom to top in increasing diameter, so that a conical structure is formed between each card plate 220 and the transfer column 210, and the pile body steel bar 22 is tightly clamped and fixed with the uppermost card plate 220.
[0039] As Figure 2 shown, in one embodiment, a retaining platform 270 is provided at the bottom end of the conversion column 210. The diameter of the retaining platform 270 is greater than the diameter of the through hole 221, and the retaining platform 270 abuts against the pile body 21. In this way, the retaining platform 270 is used to tightly fix the clamping plate 220, so that the clamping plate 220 and the conversion column 210 are reliably fixed as a whole.
[0040] As Figure 2 shown, in one embodiment, a plurality of locking columns 280 are provided at one end of the conversion column 210 away from the retaining platform 270. A plurality of locking holes are formed in the adapter base 230. Each locking column 280 is respectively used to pass through each locking hole and then threadedly engage with the first nut 291, so as to fix the adapter base 230 and the conversion column 210.
[0041] It should be noted that the locking columns 280 are circumferentially distributed on the conversion column 210. External threads are provided on each locking column 280. After each locking column 280 passes through each locking hole, the first nuts 291 are respectively threadedly engaged and fixed with the locking columns 280, so that the adapter base 230 and the conversion column 210 are tightly locked and fixed.
[0042] As Figure 1 and Figure 2 shown, in one embodiment, the adapter base 230 includes an integrally formed shaft column 231, a circular plate 232 and a square plate 233. The two ends of the shaft column 231 are respectively connected to the circular plate 232 and the square plate 233, and each locking hole is located on the circular plate 232.
[0043] It should be noted that in this way, the circular plate 232 is fixed to the conversion column 210, and the square plate 233 is fixed to the top plate 240 through the connecting columns 250. The connecting columns 250 are divided into two groups, and the two groups of connecting columns 250 are respectively located on the opposite side surfaces of the square plate 233.
[0044] As Figure 1 and Figure 2 shown, in one embodiment, a column head 251 is provided at one end of the connecting column 250, and the other end is used to threadedly engage with the second nut 252, so that one of the column head 251 and the second nut 252 abuts against the top plate 240, and the other abuts against the square plate 233.
[0045] It should be noted that through holes are formed at the corresponding positions of the square plate 233 and the top plate 240. The connecting columns 250 sequentially pass through the through holes of the square plate 233 and the through holes of the top plate 240, and then the second nut 252 is threadedly engaged and fixed with the connecting columns 250, so that the top plate 240 and the square plate 233 are clamped and fixed by the connecting columns 250. In one embodiment, a plurality of second nuts 252 are provided. In this way, the structural strength between the connecting columns 250 and the top plate 240 / square plate 233 can be improved.
[0046] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. Among them, the installation / fixing / setting mentioned in the present utility model can be understood to include, but not limited to, locking and fixing by using screws, welding, unless otherwise specifically defined. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. A single-pile vertical uplift test device for testing the tensile uplift force of a foundation pile, wherein the foundation pile comprises a pile body and a plurality of pile body steel bars, and is characterized in that, Comprising: A support component, the support component includes a cross beam, a jack and two cushion seats, the two cushion seats are arranged on both sides of the foundation pile, both ends of the cross beam are arranged on the two cushion seats, and the jack is arranged on the cross beam; and A reaction force component, the reaction force component includes a conversion column, a clamping plate, an adapter seat, a top plate and a plurality of connecting columns, the top plate is arranged on the jack, the conversion column is arranged on the top of the pile body, the clamping plate is sleeved on the conversion column, and each pile body steel bar is respectively clamped with the periphery of the clamping plate, the adapter seat is arranged on the top of the conversion column, and the adapter seat is located below the cross beam, one end of each connecting column is respectively clamped with the adapter seat, the other end of each connecting column is respectively clamped with the top plate, and each connecting column is divided into two groups, and the two groups of connecting columns are respectively located on both sides of the cross beam.
2. The single-pile vertical uplift test device according to claim 1, wherein, The top surface of the cushion seat is higher than the top surface of the adapter seat.
3. The single-pile vertical uplift test device according to claim 1, wherein, A perforation is formed in the axis of the clamping plate to allow the conversion column to pass through the perforation.
4. The single-pile vertical uplift test device according to claim 3, wherein, A plurality of clamping grooves are formed on the outer peripheral wall of the clamping plate, the clamping grooves are equally angularly distributed, and each pile body steel bar is respectively clamped with each clamping groove.
5. The single-pile vertical uplift test device according to claim 4, characterized in that The reaction force component further includes a plurality of clamping sleeves, each clamping sleeve is respectively welded to each pile body steel bar, and each clamping sleeve abuts against the top surface of the clamping plate.
6. The single-pile vertical uplift test device according to claim 5, characterized in that, A plurality of clamping plates are provided, and each clamping plate is stacked layer by layer from bottom to top in increasing diameter, so that the clamping plate located at the bottom is clamped with the conversion column, and the clamping plate located at the top abuts against the clamping sleeve.
7. The single-pile vertical uplift test device according to claim 6, characterized in that, A clamping platform is arranged at the bottom end of the conversion column, the diameter of the clamping platform is larger than the diameter of the perforation, and the clamping platform abuts against the pile body.
8. The single-pile vertical uplift test device according to claim 7, characterized in that, A plurality of locking columns are arranged at one end of the conversion column away from the clamping platform, a plurality of locking holes are formed in the adapter seat, and each locking column is used to respectively pass through each locking hole and then be screwed with a first nut, so that the adapter seat is fixed to the conversion column.
9. The single-pile vertical uplift test device according to claim 8, characterized in that, The adapter seat includes an integrally formed shaft column, a circular plate and a square plate, both ends of the shaft column are respectively connected to the circular plate and the square plate, and each locking hole is located on the circular plate.
10. The single-pile vertical uplift test device according to claim 9, characterized in that, One end of the connecting column is provided with a column head, and the other end is used to be screwed with a second nut, so that one of the column head and the second nut abuts against the top plate, and the other abuts against the square plate.