CN210395467U - Novel single-pile pulling-resistant static load test device - Google Patents
Novel single-pile pulling-resistant static load test device Download PDFInfo
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- CN210395467U CN210395467U CN201920579006.7U CN201920579006U CN210395467U CN 210395467 U CN210395467 U CN 210395467U CN 201920579006 U CN201920579006 U CN 201920579006U CN 210395467 U CN210395467 U CN 210395467U
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Abstract
The utility model provides a novel single pile resistance to plucking static test device, including experimental stake, counter-force crossbeam and two jacks, experimental stake both sides are set for the position symmetry and are provided with first cushion, each first cushion is two-stage stair structure, including high-rise plane and low floor plane, the counter-force crossbeam erects on two high-rise planes, two the jack is installed respectively on two low floor planes, and is located under the counter-force crossbeam, each the card is equipped with a load measuring apparatu between jack and the counter-force crossbeam, the experimental stake outside is equipped with at least one displacement sensor, experimental stake is connected through force transfer device with the counter-force crossbeam. The utility model discloses a set up the first cushion of echelonment, can settle counter-force crossbeam and jack, provide jack counter-force and crossbeam holding power simultaneously, need not to beat the anchor pile, the structure is simple relatively, the simple operation, easily realization, the suitability is high, has reduced the construction degree of difficulty, practices thrift experimental cost.
Description
Technical Field
The utility model relates to a building engineering field indicates a novel single pile resistance to plucking static test device very much.
Background
With the development of civil engineering, the materials and types of pile foundations are also developed into a variety, and the application field of the pile foundations is more and more extensive. Compared with the ancient wood foundation, the performance of the modern pile foundation is greatly improved, and the application field of the pile foundation is also wide. In the current engineering application, the pile foundation not only needs to ensure the vertical compression bearing capacity and the horizontal load bearing capacity, but also ensures the uplift bearing capacity in some engineering applications. When the pile foundation is applied to the engineering bearing the vertical pulling resistance, a single-pile vertical pulling resistance static load test must be carried out according to the relevant regulations of the building foundation pile detection technical specification JGJ106-2014 in China.
The existing single-pile vertical uplift static load test mode mostly adopts a counter-force pile or anchor pile mode to provide counter-force, and the construction is complex and the cost is high; and the existing uplift pile test generally adopts steel bar welding, and the problem that a counterforce device is not firm or steel bars are burnt is easily caused due to the welding quality problem.
Disclosure of Invention
The to-be-solved technical problem of the utility model lies in providing a structure is simple relatively, the high resistance to plucking static load test device of novel pile foundation of suitability.
The utility model discloses a realize like this:
the utility model provides a novel single pile resistance to plucking static test device, includes experimental stake, reaction crossbeam and two jacks, experimental stake both sides are set for the position symmetry and are provided with first cushion, each first cushion is two-stage stair structure, including high level plane and low floor plane, the reaction crossbeam erects on two high level plane, two the jack is installed respectively on two low floor planes, and is located under the reaction crossbeam, each the card is equipped with a load measuring apparatu between jack and the reaction crossbeam, the experimental stake outside is equipped with at least one displacement sensor, experimental stake is connected through power transmission device with the reaction crossbeam, through power transmission device will the power conduction that the jack produced is to experimental stake.
Further, a second cushion block is arranged between each load measuring instrument and the counter-force beam.
Preferably, the second cushion block is a steel cushion block.
Furthermore, the force transmission device comprises a first bearing plate, a second bearing plate and a dowel bar,
the first bearing plate is fixed on the upper surface of the test pile through a connecting bolt prefabricated in the test pile, the second bearing plate is arranged on the upper surface of the counterforce cross beam, and the first bearing plate is connected with the second bearing plate through a dowel.
Preferably, the first bearing plate and the second bearing plate are both steel plates.
Preferably, the dowel bar is a threaded rod, and two ends of the dowel bar are fastened through dowel bar nuts.
Preferably, the first cushion block is a concrete cushion block.
Preferably, the reaction beam is a steel beam.
The utility model has the advantages that:
1. through setting up the first cushion of echelonment, can settle reaction crossbeam and jack, provide jack counter-force and crossbeam holding power simultaneously, need not to beat the anchor pile, the structure is simple relatively, the simple operation, easily realization, the suitability is high, has reduced the construction degree of difficulty, practices thrift experimental cost.
2. Vertical pulling force is applied to the test pile through the force transmission device, and the problem that the counterforce device is insecure or steel bars are burnt due to the welding quality problem of the steel bars is solved, so that the reliability and the stability of the test are ensured, and the anti-pulling performance of the pile foundation can be accurately reflected.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic front view of a force transfer device according to an embodiment of the present invention.
Fig. 3 is a schematic side view of a force transfer device according to an embodiment of the present invention.
The reference numbers illustrate:
the method comprises the following steps of 1-a test pile, 2-a first cushion block, 21-a high-rise plane, 22-a low-rise plane, 3-a counter-force beam, 4-a jack, 5-a load measuring instrument, 6-a force transmission device, 61-a first force bearing plate, 62-a second force bearing plate, 63-a dowel bar, 64-a dowel bar nut, 7-a displacement sensor, 8-a connecting bolt and 9-a second cushion block.
Detailed Description
Referring to fig. 1 to 3, a novel single-pile uplift static load test device comprises a test pile 1, a reaction cross beam 3 and two jacks 4, wherein first cushion blocks 2 are symmetrically arranged at two sides of the test pile 1 at set positions, each first cushion block 2 is of a two-stage ladder structure and comprises a high-rise plane 21 and a low-rise plane 22, specifically, the first cushion blocks 2 can be obtained by pouring concrete at a construction site according to specific test requirements, the reaction cross beam 3 is erected on the two high-rise planes 21, the two jacks 4 are respectively installed on the two low-rise planes 22 and are located right below the reaction cross beam 3, specifically, the reaction cross beam 3 is a steel beam and can be arranged in an i shape and is firmer, a load measuring instrument 5 is clamped between each jack 4 and the reaction cross beam 3, at least one displacement sensor 7 is arranged on the outer side of the test pile 1, in one embodiment, 2 displacement sensors 7 are provided to ensure more accurate and reliable measurement data; the test pile 1 is connected with the counter-force beam 3 through the force transmission device 6, the force transmission device 6 transmits force generated by the jack 4 to the test pile 1, the counter-force beam 3 and the jack 4 can be arranged simultaneously through the first cushion block 2 with the ladder shape, meanwhile, counter-force of the jack 4 and supporting force of the counter-force beam 3 are provided, anchor piles do not need to be driven, the structure is relatively simple, operation is convenient, and implementation is easy.
In one embodiment, the force transmission device 6 comprises a first force bearing plate 61, a second force bearing plate 62 and a force transmission rod 63,
the first bearing plate 61 is fixed on the upper surface of the test pile 1 through a connecting bolt 8 prefabricated in the test pile 1, the second bearing plate 62 is arranged on the upper surface of the counter-force beam 3, the first bearing plate 61 is connected with the second bearing plate 62 through a dowel steel 63, the first bearing plate 61 and the second bearing plate 62 are steel plates, the dowel steel 63 is a threaded rod, and two ends of the dowel steel 63 are respectively fastened with the first bearing plate 61 and the second bearing plate 62 through dowel steel nuts 64. In one embodiment, the dowel bar 63 is a threaded rod with a diameter of 24mm, and the first bearing plate 61 and the second bearing plate 62 are made of Q345 steel and have a thickness of 40 mm. The embodiment of the utility model provides a through threaded rod and bearing plate connection test stake 1 and counter-force crossbeam 3, need not the welding, the connected mode is reliable firm.
In another embodiment, the height of the lower plane 22 of the first cushion block 2 can be reduced according to actual conditions, and meanwhile, the second cushion block 9 is clamped between each load measuring instrument 5 and the reaction beam 3, specifically, the second cushion block 9 is a steel cushion block, and the second cushion block 9 is arranged, so that the height of the first cushion block 2 is more flexibly set, the realization is convenient, the contact surface with the reaction beam 3 can be increased, the structure is more stable, and the stress on the reaction beam 3 is more uniform.
In the actual test process, firstly, a test pile 1 is manufactured on a test site, a plurality of connecting bolts 8 are prefabricated at the top end of the test pile 1, two concrete cushion blocks (namely a first cushion block 2) are poured at proper distances at two sides of the test pile 1, the concrete cushion blocks are of a two-stage ladder structure (the vertical surfaces of the concrete cushion blocks are L-shaped) and comprise high-rise planes 21 and low-rise planes 22, the sizes and the heights of the two concrete cushion blocks are kept consistent, a counterforce cross beam 3 is erected on the two high-rise planes 21, two hydraulic jacks 4 are respectively installed on the two low-rise planes 21 and are positioned under the counterforce cross beam 3, a load tester 5 is installed above the hydraulic jacks 4 to test the size of a load, a steel counterforce cushion block 9 is installed above the load tester 5, and the height of the steel cushion block 9 is just clamped between a steel beam 3 and the load tester 5; the first bearing plate 61 and the second bearing plate 62 of the force transmission device 6 are provided with through holes corresponding to the force transmission rods 63 one by one, the first bearing plate 61 is further provided with through holes corresponding to the connecting bolts 8 on the upper surface of the test pile 1 one by one, the first bearing plate 61 is fixed on the upper surface of the test pile 1 through the connecting bolts 8 and corresponding nuts, the second bearing plate 62 is arranged on the upper surface of the counter-force cross beam 3, and the second bearing plate 62 is fixedly connected with the first bearing plate 61 through the force transmission rods 63 and the force transmission rod nuts 64. The loading load of the hydraulic jack 4 is transferred to the reaction steel beam 3 through the load tester 5 and the steel cushion block 9, and the load is applied to the test pile by the force transfer device 6 on the reaction steel beam 3. And two sides of the test pile are respectively provided with a displacement sensor 7 to measure the vertical displacement of the test pile, and the relationship between the pulling force applied to the test pile 1 and the displacement of the test pile 1 can be obtained through the measurement results of the load tester 5 and the displacement sensors 7.
The counter-force beam and the jack can be arranged by arranging the stepped first cushion block, the counter-force beam and the jack are provided, the counter-force and the beam supporting force of the jack are provided at the same time, anchor piles do not need to be driven, the structure is relatively simple, the operation is convenient and fast, the implementation is easy, the applicability is high, the construction difficulty is reduced, and the test cost is saved; vertical pulling force is applied to the test pile through the force transmission device, and the problem that the counterforce device is insecure or steel bars are burnt due to the welding quality problem of the steel bars is solved, so that the reliability and the stability of the test are ensured, and the anti-pulling performance of the pile foundation can be accurately reflected.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. The utility model provides a novel single pile resistance to plucking static test device, includes experimental stake, reaction beam and two jacks, its characterized in that: experimental stake both sides are set for the position symmetry and are provided with first cushion, each first cushion is two-stage stair structure, including high-rise plane and low floor plane, the reaction crossbeam erects on two high-rise planes, two the jack is installed respectively on two low floor planes, and is located under the reaction crossbeam, each the card is equipped with a load measuring apparatu between jack and the reaction crossbeam, the experimental stake outside is equipped with at least one displacement sensor, experimental stake passes through force transfer device with the reaction crossbeam and is connected, through force transfer device will the power conduction that the jack produced is to experimental stake.
2. The novel single-pile uplift static load test device as claimed in claim 1, wherein: and a second cushion block is arranged between each load measuring instrument and the counter-force beam.
3. The novel single-pile uplift static load test device as claimed in claim 2, wherein: the second cushion block is a steel cushion block.
4. The novel single-pile uplift static load test device as claimed in claim 1, wherein: the force transmission device comprises a first bearing plate, a second bearing plate and a dowel bar,
the first bearing plate is fixed on the upper surface of the test pile through a connecting bolt prefabricated in the test pile, the second bearing plate is arranged on the upper surface of the counterforce cross beam, and the first bearing plate is connected with the second bearing plate through a dowel.
5. The novel single-pile uplift static load test device as claimed in claim 4, wherein: the first bearing plate and the second bearing plate are both steel plates.
6. The novel single-pile uplift static load test device as claimed in claim 4, wherein: the dowel bar is a threaded rod, and two ends of the dowel bar are fastened through dowel bar nuts.
7. The novel single-pile uplift static load test device as claimed in claim 1, wherein: the first cushion block is a concrete cushion block.
8. The novel single-pile uplift static load test device as claimed in claim 1, wherein: the reaction beam is a steel beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920579006.7U CN210395467U (en) | 2019-04-25 | 2019-04-25 | Novel single-pile pulling-resistant static load test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920579006.7U CN210395467U (en) | 2019-04-25 | 2019-04-25 | Novel single-pile pulling-resistant static load test device |
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| CN210395467U true CN210395467U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879058A (en) * | 2023-08-25 | 2023-10-13 | 中国水利水电科学研究院 | Self-reaction force shear test device and method applied to original graded coarse-grained soil |
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2019
- 2019-04-25 CN CN201920579006.7U patent/CN210395467U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879058A (en) * | 2023-08-25 | 2023-10-13 | 中国水利水电科学研究院 | Self-reaction force shear test device and method applied to original graded coarse-grained soil |
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