Single-pile vertical compression resistance static load testing device

Abstract

The utility model aims to provide a single pile vertical compression resistance static load testing device, which is used for detecting a foundation pile buried underground and comprises a ballast assembly and a counter-force assembly, the ballast assembly comprises two supporting seats and a plurality of counterweight strips, the two supporting seats are respectively arranged on two opposite sides of the foundation pile, and the counter-force assembly is arranged on the counter-force assembly. The counter-force assembly comprises a hydraulic jack, a cross beam, two supporting seats, two auxiliary piles and two hooping pieces, the two supporting seats are arranged on the two opposite sides of the foundation pile correspondingly, and therefore the two supporting seats and the two supporting seats are sequentially distributed in a staggered mode around the foundation pile; the two ends of the cross beam are arranged on the two supporting seats in an overlapped mode respectively, the cross beam is located below the balance weight strips, the hydraulic jack is arranged on the foundation pile, the two auxiliary piles are buried underground and located on the two sides, close to the two supporting seats, of the foundation pile respectively, and the two hooping pieces are arranged on the cross beam in a sleeving mode. The two hooping pieces are connected with the two auxiliary piles correspondingly.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a single-pile vertical compressive static load testing device. Background Technique

[0002] The single-pile vertical compressive static load test is one of the methods for pile foundation detection, which is used to determine the single-pile vertical compressive bearing capacity and is an intuitive and reliable traditional method for detecting the vertical compressive bearing capacity of foundation piles.

[0003] At present, the single-pile vertical compressive test is mainly completed by using a hydraulic jack through a reaction device. For example, the Chinese patent document with the application number CN202022162757.4 discloses a single-pile vertical compressive bearing capacity testing device, which includes a pile head. A plurality of jacks are arranged on the top of the pile head, a load-bearing platform is placed on the top of the jacks, a number of counterweight blocks are carried on the load-bearing platform, a bearing base is arranged between the pile head and the jacks, the bearing base includes a horizontal upper support plate and a lower support plate, a vertical support column is connected between the upper support plate and the lower support plate, a plurality of hinge supports are arranged on the outer edge of the lower support plate, a telescopic rod that can rotate in the vertical plane is rotatably connected to the hinge support, a clamping plate perpendicular to the telescopic rod is hinged at the front end of the telescopic rod, and a plurality of jacks are synchronously linked. In this way, a telescopic rod and a clamping plate are arranged at the edge of the bearing base, and the bearing base can be firmly fixed on the pile head during the test process to improve stability; 4 jacks are arranged on the testing device, and the 4 jacks work synchronously, which can improve the safety and balance during the test process.

[0004] However, the existing single-pile vertical compressive test devices have the following deficiencies: For foundation piles with large bearing requirements, such as foundation piles with a requirement of up to hundreds of tons, a large number of counterweight blocks are required during the compressive test, which means that the cumulative height and volume of the counterweight blocks are too large. In this way, not only will the difficulty of test installation be increased, but there will also be certain potential safety hazards. Therefore, in order to solve the above technical problems, the single-pile vertical compressive static load testing 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 compressive static load testing device that can meet the requirements of testing large-tonnage foundation piles while reducing the demand for counterweight blocks.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A single-pile vertical compressive static load testing device for detecting a foundation pile buried underground includes:

[0008] A ballast assembly, the ballast assembly including two support seats and a plurality of counterweight bars, the two support seats being respectively arranged on opposite sides of the foundation pile, and both ends of each counterweight bar being respectively stacked on the two support seats; and

[0009] A reaction force assembly, the reaction force assembly including a hydraulic jack, a cross beam, two supporting seats, two auxiliary piles and two clamping members, the two supporting seats being respectively arranged on opposite sides of the foundation pile, such that the two support seats and the two supporting seats are alternately distributed around the foundation pile in sequence, both ends of the cross beam being respectively stacked on the two supporting seats, and the cross beam being located below each counterweight bar, the hydraulic jack being arranged on the foundation pile, and the hydraulic jack abutting against the lower side surface of the cross beam, both of the two auxiliary piles being buried underground, and the two auxiliary piles being respectively located on two sides of the foundation pile close to the two supporting seats, and the auxiliary piles being located between the foundation pile and the supporting seats, both of the two clamping members being sleeved on the cross beam, and the two clamping members being respectively connected to the two auxiliary piles.

[0010] Optionally, the reaction force assembly further includes two reinforcing plates, the two reinforcing plates being respectively laid on the ground, such that the two supporting seats are respectively stacked on the two reinforcing plates, and the two auxiliary piles respectively penetrate through the two reinforcing plates.

[0011] Optionally, a plurality of ground anchors are arranged on the lower side surface of the reinforcing plate, and each ground anchor is buried underground.

[0012] Optionally, the counterweight bar includes a concrete body, two end plates and a plurality of steel bars, one end of each steel bar being welded to one of the end plates, the other end of each steel bar being welded to the other end plate, the concrete body covering each steel bar, and both ends of the concrete body abutting against the two end plates respectively.

[0013] Optionally, a plurality of spaced-apart splicing blocks are arranged on the side surface of the end plate away from the concrete body.

[0014] Optionally, at least one through hole is formed in the splicing block.

[0015] Optionally, the clamping member includes a cross plate, a clamping block, a plurality of pull columns and a plurality of stud bolts, one end of each pull column being arranged on one side surface of the cross plate, and the other end of each pull column being connected to the auxiliary pile, one end of each stud bolt being arranged on the other side surface of the cross plate, and the other end of each stud bolt being connected to the clamping block, such that the clamping block, the cross plate and each stud bolt are sleeved on the cross beam, and the clamping block and the cross plate are respectively located on the upper and lower side surfaces of the cross beam.

[0016] Optionally, the reaction force assembly further includes a bottom plate disposed on the foundation pile, and the hydraulic jack is disposed on the bottom plate.

[0017] Optionally, the reaction force assembly further includes a top plate located between the hydraulic jack and the cross beam.

[0018] Optionally, the reaction force assembly further includes two cushion blocks respectively disposed on two supporting seats, and two ends of the cross beam are respectively stacked on the two cushion blocks.

[0019] Compared with the prior art, the present utility model has at least the following advantages:

[0020] The single-pile vertical compressive static load testing device of the present utility model is used for detecting a foundation pile buried underground, and includes a ballast assembly and a reaction force assembly. The ballast assembly includes two supporting seats and a plurality of counterweight bars. The two supporting seats are respectively disposed on opposite sides of the foundation pile, and both ends of each counterweight bar are respectively stacked on the two supporting seats. The reaction force assembly includes a hydraulic jack, a cross beam, two supporting seats, two auxiliary piles and two fastening members. The two supporting seats are respectively disposed on opposite sides of the foundation pile, such that the two supporting seats and the two supporting seats are alternately distributed around the foundation pile in sequence. Two ends of the cross beam are respectively stacked on the two supporting seats, and the cross beam is located below each counterweight bar. The hydraulic jack is disposed on the foundation pile and abuts against the lower side surface of the cross beam. The two auxiliary piles are both buried underground, and the two auxiliary piles are respectively located on two sides of the foundation pile close to the two supporting seats, and the auxiliary piles are located between the foundation pile and the supporting seats. The two fastening members are both sleeved on the cross beam, and the two fastening members are respectively connected to the two auxiliary piles. Thus, compared with the existing structure that only stacks counterweight bars when testing large-tonnage foundation piles, in this application, the auxiliary piles are added to apply a tensile force to the cross beam, so that the number of counterweight bars can be effectively reduced. Not only can the risk of collapse caused by excessive stacking of counterweight bars be avoided, but also the use of counterweight bars can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic cross-sectional structure diagram of a single-pile vertical compressive static load testing device according to an embodiment of the present utility model;

[0023] Figure 2Schematic cross-sectional structure diagram of a single-pile vertical compressive static load test device according to an embodiment of the present utility model from another angle;

[0024] Figure 3 Partial structure schematic diagram of a single-pile vertical compressive static load test device according to an embodiment of the present utility model;

[0025] Figure 4 Partial structure schematic diagram of a counterweight bar according to an embodiment of the present utility model;

[0026] Figure 5 is Figure 4 Partial cross-sectional structure schematic diagram of the counterweight bar shown.

[0027] Explanation of reference numerals:

[0028] 10. Single-pile vertical compressive static load test device; 20. Foundation pile; 100. Ballast assembly; 200. Reaction force assembly; 110. Support base; 120. Counterweight bar; 210. Hydraulic jack; 220. Cross beam; 230. Support seat; 240. Auxiliary pile; 250. Clamping member; 261. Reinforcing plate; 262. Ground anchor; 121. Concrete body; 122. End plate; 123. Steel bar; 124. Splicing block; 1241. Through hole; 251. Cross plate; 252. Block; 253. Pulling column; 254. Stud; 271. Bottom plate; 272. Top plate; 273. Spacer block. Detailed implementation manners

[0029] For ease of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings.

[0030] Such as Figures 1 to 3As shown, a single-pile vertical compressive static load testing device 10 is used to detect a foundation pile 20 buried underground. It includes a ballast component 100 and a reaction force component 200. The ballast component 100 includes two support seats 110 and a number of counterweight bars 120. The two support seats 110 are respectively arranged on the opposite sides of the foundation pile 20. The two ends of each counterweight bar 120 are respectively stacked on the two support seats 110. The reaction force component 200 includes a hydraulic jack 210, a cross beam 220, two supporting seats 230, two auxiliary piles 240 and two tightening members 250. The two supporting seats 230 are respectively arranged on the opposite sides of the foundation pile 20, so that the two support seats 110 and the two supporting seats 230 are arranged in a staggered manner around the foundation pile 20 in sequence. The two ends of the cross beam 220 are respectively stacked on the two supporting seats 230, and the cross beam 220 is located below each counterweight bar 120. The hydraulic jack 210 is arranged on the foundation pile 20, and the hydraulic jack 210 abuts against the lower side of the cross beam 220. The two auxiliary piles 240 are both buried underground, and the two auxiliary piles 240 are respectively located on the two sides of the foundation pile 20 close to the two supporting seats 230, and the auxiliary piles 240 are located between the foundation pile 20 and the supporting seats 230. The two tightening members 250 are both sleeved on the cross beam 220, and the two tightening members 250 are respectively connected to the two auxiliary piles 240.

[0031] It should be noted that both of the two support bases 110 are placed on the ground, and the two support bases 110 are respectively located at two opposite sides of the foundation pile 20. In one embodiment, the support base 110 can be formed by stacking multiple concrete blocks according to the actual height. It should be noted that the length of the counterweight bar 120 is greater than the distance between the two support bases 110. In this way, each counterweight bar 120 is supported by the two support bases 110, so that each counterweight bar 120 is located above the foundation pile 20. Further, both of the two supporting seats 230 are also placed on the ground, and the two supporting seats 230 are both located on the other two opposite sides of the foundation pile 20. The two supporting seats 230 and the two support bases 110 are alternately and circumferentially distributed around the foundation pile 20 in sequence, and the two supporting seats 230 and the two support bases 110 form a rectangular structure around the foundation pile 20. Further, both ends of the cross beam 220 are respectively stacked on the two supporting seats 230, so that the cross beam 220 spans above the foundation pile 20, and the cross beam 220 is located below each counterweight bar 120. The hydraulic jack 210 is placed on the foundation pile 20, and the output shaft of the hydraulic jack 210 is aligned with the lower side surface of the cross beam 220. Further, both of the two auxiliary piles 240 are buried underground, and the two auxiliary piles 240 are respectively located between the foundation pile 20 and the two supporting seats 230. Further, one end of the tightening member 250 is connected to the auxiliary pile 240, and the other end of the tightening member 250 is connected to the cross beam 220. In this way, when the hydraulic jack 210 is activated to push the cross beam 220 and the foundation pile 20, since the cross beam 220 spans below each counterweight bar 120, the cross beam 220 pushes each counterweight bar 120. Further, as the cross beam 220 rises, the cross beam 220 pulls out the two auxiliary piles 240 through the tightening member 250. Therefore, compared with the existing structure that only stacks the counterweight bars 120 when testing large-tonnage foundation piles 20, the present application applies a tensile force to the cross beam 220 through the added auxiliary piles 240, so that the number of counterweight bars 120 can be effectively reduced. It can not only avoid the collapse risk caused by excessive stacking of the counterweight bars 120, but also reduce the use of the counterweight bars 120, thereby reducing the workload of installing and placing the counterweight bars 120.

[0032] As Figure 1 shown, in one embodiment, the reaction force assembly 200 further includes two reinforcing plates 261. The two reinforcing plates 261 are respectively laid on the ground, so that the two supporting seats 230 are respectively stacked on the two reinforcing plates 261, and the two auxiliary piles 240 respectively pass through the two reinforcing plates 261.

[0033] It should be noted that when the auxiliary pile 240 provides the pulling force for the test of the basic pile 20, in order to prevent the soil around the basic pile 20 from becoming loose, a reinforcement plate 261 is laid on the ground, and the reinforcement plate 261 is located around the auxiliary pile 240. Further, by using the support base 230 to press the reinforcement plate 261, the structural strength of the reinforcement plate 261 can be enhanced. In one embodiment, the reinforcement plate 261 is a steel plate with a thickness of 30 mm.

[0034] As Figure 1 shown, in one embodiment, a plurality of ground anchors 262 are provided on the lower side surface of the reinforcement plate 261, and each ground anchor 262 is buried underground.

[0035] It should be noted that, for example, the ground anchor 262 and the reinforcement plate 261 are fixed by welding. Further, in one embodiment, the length of the ground anchor 262 is 1.2 m to 1.6 m. In this way, the firmness between the reinforcement plate 261 and the ground can be enhanced.

[0036] As Figure 1 、 Figure 4 and Figure 5 shown, in one embodiment, the counterweight bar 120 includes a concrete body 121, two end plates 122 and a plurality of steel bars 123. One end of each steel bar 123 is welded to one of the end plates 122, and the other end of each steel bar 123 is welded to the other end plate 122. The concrete body 121 covers each steel bar 123, and both ends of the concrete body 121 are abutted against the two end plates 122 respectively.

[0037] It should be noted that in order to enhance the structural strength of the counterweight bar 120, the above structure is provided. Specifically, the two end plates 122 are respectively welded and fixed at both ends of each steel bar 123. Then, concrete is poured between the two end plates 122 so that the formed concrete body 121 covers each steel bar 123. In this way, the anti-collision performance at both ends of the counterweight bar 120 can be enhanced. It should be noted that the counterweight bars 120 are all designed to have a predetermined weight. Since there is no protection structure at both ends of the existing counterweight bars 120, they will be knocked after multiple uses, resulting in a decrease in the weight of the counterweight bars 120. In this application, by arranging the end plates 122 at both ends, the anti-collision performance of the counterweight bar 120 can be effectively improved.

[0038] As Figure 4 shown, in one embodiment, a plurality of spaced-apart splicing blocks 124 are provided on the side surface of the end plate 122 away from the concrete body 121.

[0039] It should be noted that each splicing block 124 and the end plate 122 are integrally formed structures. Further, there are four splicing blocks 124, and the four splicing blocks 124 are located at the four sides of the end plate 122. In this way, when multiple counterweight bars 120 are stacked, the splicing blocks 124 of two adjacent counterweight bars 120 can be fixed by bolts, so that the stacked counterweight bars 120 form a whole. Compared with the existing counterweight blocks which are independent structures, the stability can be effectively improved. Moreover, through the splicing blocks 124, it is convenient for the lifting rope to transfer the counterweight bars 120 through the splicing blocks 124.

[0040] As Figure 4 shown, in an embodiment, at least one through hole 1241 is formed in the splicing block 124. In this way, by passing the bolt through the through hole 1241, the stacked counterweight bars 120 can be fixed together.

[0041] As Figure 1 shown, in an embodiment, the tightening member 250 includes a cross plate 251, a clamping block 252, a plurality of pull columns 253 and a plurality of stud bolts 254. One end of each pull column 253 is arranged on one side surface of the cross plate 251, and the other end of each pull column 253 is connected with the auxiliary pile 240. One end of each stud bolt 254 is arranged on the other side surface of the cross plate 251, and the other end of each stud bolt 254 is connected with the clamping block 252, so that the clamping block 252, the cross plate 251 and each stud bolt 254 are sleeved on the cross beam 220, and the clamping block 252 and the cross plate 251 are respectively located on the upper and lower side surfaces of the cross beam 220.

[0042] It should be noted that each pull column 253 and the cross plate 251 are fixed by welding, and each pull column 253 and the steel bar in the auxiliary pile 240 are also fixed by welding, and one end of each stud bolt 254 and the cross plate 251 are also fixed by welding. Further, the stud bolts 254 are divided into two groups, and the two groups of stud bolts 254 are respectively located on both sides of the cross beam 220. The clamping block 252 is located above the cross beam 220, and each stud bolt 254 passes through the clamping block 252, and then the bolt is screwed and fixed with each stud bolt 254 on the upper side surface of the clamping block 252. In this way, the tightening member 250 and the cross beam 220 are tightly fixed. In this way, when the hydraulic jack 210 pushes the cross beam 220, the cross beam 220 pulls out the auxiliary pile 240 through the tightening member 250.

[0043] As Figure 1 shown, in an embodiment, the reaction force assembly 200 further includes a bottom plate 271, the bottom plate 271 is arranged on the foundation pile 20, and the hydraulic jack 210 is arranged on the bottom plate 271.

[0044] It should be noted that, in order to enable the hydraulic jack 210 to evenly transfer the pressure to the foundation pile 20, a bottom plate 271 is horizontally placed on the top surface of the foundation pile 20, and then the hydraulic jack 210 is placed on the bottom plate 271. In one embodiment, the bottom plate 271 is made of steel plate.

[0045] As Figure 1 shown, in one embodiment, the reaction force assembly 200 further includes a top plate 272, and the top plate 272 is located between the hydraulic jack 210 and the cross beam 220.

[0046] It should be noted that, in order to increase the stress point between the output shaft of the hydraulic jack 210 and the cross beam 220, a top plate 272 is installed between the hydraulic jack 210 and the cross beam 220. In one embodiment, the top plate 272 is also made of steel plate.

[0047] As Figure 1 shown, in one embodiment, the reaction force assembly 200 further includes two cushion blocks 273. The two cushion blocks 273 are respectively arranged on the two support seats 230, and the two ends of the cross beam 220 are respectively stacked on the two cushion blocks 273. It should be noted that, for example, the cushion block 273 is made of wood structure. Further, the cross beam 220 is made of steel material, and the support seat 230 is made of concrete structure. In this way, the stress position between the cross beam 220 and the support seat 230 is increased, and the support seat 230 can be prevented from being cracked by the cross beam 220.

[0048] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations 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 utility model patent shall be subject to the appended claims.

Claims

1. A single-pile vertical compressive static load testing device for detecting a foundation pile buried underground, characterized in that Comprising: A ballast assembly, the ballast assembly including two support seats and a plurality of counterweight bars, the two support seats being respectively arranged on opposite sides of the foundation pile, and both ends of each counterweight bar being respectively stacked on the two support seats; and A reaction force assembly, the reaction force assembly including a hydraulic jack, a cross beam, two support seats, two auxiliary piles and two tightening members, the two support seats being respectively arranged on opposite sides of the foundation pile, such that the two support seats and the two support seats are alternately distributed around the foundation pile in sequence, both ends of the cross beam being respectively stacked on the two support seats, and the cross beam being located below each counterweight bar, the hydraulic jack being arranged on the foundation pile, and the hydraulic jack abutting against the lower side surface of the cross beam, both of the two auxiliary piles being buried underground, and the two auxiliary piles being respectively located on two sides of the foundation pile close to the two support seats, and the auxiliary piles being located between the foundation pile and the support seats, both of the two tightening members being sleeved on the cross beam, and the two tightening members being respectively connected to the two auxiliary piles.

2. The single-pile vertical compressive static load test device according to claim 1, characterized in that, The reaction force assembly further includes two reinforcing plates, the two reinforcing plates being respectively laid on the ground, such that the two support seats are respectively stacked on the two reinforcing plates, and the two auxiliary piles respectively penetrate through the two reinforcing plates.

3. The single-pile vertical compressive static load testing device according to claim 2, characterized in that, A plurality of ground anchors are arranged on the lower side surface of the reinforcing plate, and each ground anchor is buried underground.

4. The single-pile vertical compressive static load test device according to claim 1, characterized in that, The counterweight bar includes a concrete body, two end plates and a plurality of steel bars, one end of each steel bar being welded to one of the end plates, the other end of each steel bar being welded to the other end plate, the concrete body covering each steel bar, and both ends of the concrete body respectively abutting against the two end plates.

5. The single-pile vertical compressive static load testing device according to claim 4, characterized in that, A plurality of spaced-apart splicing blocks are arranged on a side surface of the end plate away from the concrete body.

6. The single-pile vertical compressive static load test device according to claim 5, characterized in that, At least one through hole is formed in the splicing block.

7. The single-pile vertical compressive static load test device according to claim 1, characterized in that, The tightening member includes a cross plate, a clamping block, a plurality of pull columns and a plurality of stud bolts, one end of each pull column being arranged on one side surface of the cross plate, and the other end of each pull column being connected to the auxiliary pile, one end of each stud bolt being arranged on the other side surface of the cross plate, and the other end of each stud bolt being connected to the clamping block, such that the clamping block, the cross plate and each stud bolt are sleeved on the cross beam, and the clamping block and the cross plate are respectively located on the upper and lower side surfaces of the cross beam.

8. The single-pile vertical compressive static load testing device according to claim 1, characterized in that, The reaction force assembly further includes a bottom plate, the bottom plate being arranged on the foundation pile, and the hydraulic jack being arranged on the bottom plate.

9. The single-pile vertical compressive static load test device according to claim 1, characterized in that, The reaction force assembly further includes a top plate, the top plate being located between the hydraulic jack and the cross beam.

10. The single-pile vertical compressive static load testing device according to claim 1, wherein, The reaction force assembly further includes two cushion blocks, the two cushion blocks being respectively arranged on the two support seats, and both ends of the cross beam being respectively stacked on the two cushion blocks.

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