CN215165892U - Pile foundation static load test counterforce device - Google Patents

Pile foundation static load test counterforce device Download PDF

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Publication number
CN215165892U
CN215165892U CN202120757153.6U CN202120757153U CN215165892U CN 215165892 U CN215165892 U CN 215165892U CN 202120757153 U CN202120757153 U CN 202120757153U CN 215165892 U CN215165892 U CN 215165892U
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China
Prior art keywords
pile
pile foundation
static load
counterforce
force
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CN202120757153.6U
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Chinese (zh)
Inventor
文石命
李珉安
僧雪明
吴云辉
马书杰
史凌浩
付思伟
杨志伟
袁大伟
董昆仑
孔琳
郭笑笑
叶曙光
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Kyushu Engineering Design Co ltd
CAPITAL OF HENAN INSTITUTE OF SCIENCE EXPERIMENT CO LTD
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Kyushu Engineering Design Co ltd
CAPITAL OF HENAN INSTITUTE OF SCIENCE EXPERIMENT CO LTD
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Priority to CN202120757153.6U priority Critical patent/CN215165892U/en
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Abstract

The utility model relates to a pile foundation static load resistance to compression test counterforce device's technical field specifically is a pile foundation resistance to compression static load test counterforce device. The utility model can support the counter-force mainboard before and after the pile foundation test through the arrangement of the supporting frame, which is beneficial to improving the safety and stability of the device; by adopting the threaded connection mode of the supporting rod and the supporting sleeve, the matching degree between the jack and the pile to be tested can be conveniently adjusted for the piles to be tested with different heights, and the pile foundation testing with different heights can be adapted; the root expanding auxiliary pile is uniformly arranged at the periphery of the pile foundation compression static load test counterforce device, and a hinge connection mode of the prestressed steel strand and the main board pull lug is adopted, so that the balance and centering performance of the system are improved, the installation is convenient, and the test is reliable.

Description

Pile foundation static load test counterforce device
Technical Field
The utility model relates to a pile foundation static load resistance to compression test counterforce device's technical field specifically is a pile foundation resistance to compression static load test counterforce device.
Background
In the building engineering, a static load compression test needs to be carried out on a sample of a pile foundation driven into the ground, and through a single-pile vertical static load test, the vertical compression bearing capacity of a single pile is determined, so that a design basis is provided for the design, and an important acceptance basis is provided for the acceptance of engineering completion.
The existing static load test is one of main methods for checking and accepting the bearing capacity of an engineering pile foundation, a pile loading method is generally adopted in the static load test for detection, when the pile loading method is used for detection, the transportation and the hoisting of ballast materials are difficult, the volume of common static load equipment is large, the transportation cost is high, the equipment is transported and assembled on site, the operation is more complicated, once a detected pile is replaced, the transportation and the hoisting of the ballast materials are needed, and the detection cannot be conveniently carried out when the detected piles with different heights are replaced.
Disclosure of Invention
The transportation and handling cost of the used large-scale ballast material of heap year method are very high, and current counterforce device installation construction difficulty, equilibrium are wayward, and efficiency is also lower, and the potential safety hazard is more, and the not convenient not co-altitude of detection stake under test, for solving above-mentioned problem, the utility model provides a pile foundation resistance to compression static test counterforce device.
The purpose of the utility model is realized through the following mode: the utility model provides a pile foundation resistance to compression static test counterforce device, evenly sets up the assistance stake around the counterforce mainboard including acting on the counterforce mainboard of the stake of being surveyed, assists stake and counterforce mainboard swing joint and is used for bearing the pulling force of assisting between stake and the counterforce mainboard, sets up the jack of exerting the testing force to the stake of being surveyed under the counterforce mainboard, and force measuring device is fixed to jack one end.
The force measuring device is arranged between the counter-force main plate and the jack or below the jack.
The auxiliary piles are 4-12.
The auxiliary pile and the reaction main board are movably connected and used for bearing tension between the auxiliary pile and the reaction main board, and the auxiliary pile and the reaction main board are connected through a prestressed steel strand which is used for bearing the tension between the auxiliary pile and the reaction main board.
And a supporting device is arranged below the edge of the counter-force main plate and used for supporting the counter-force main plate, so that the installation of the prestressed steel strand is facilitated.
The bottom of the supporting device is provided with a base which is connected with two half rings which are equivalent to each other through pin holes, the half rings are connected with the top of the base through supporting sleeves which are connected through foundation nuts, the supporting sleeves are in threaded connection with one ends of supporting rods, the other ends of the supporting rods are fixedly connected with a structural ring through top nuts, the top of the structural ring is provided with a positioning rod, and the outer surface of the positioning rod is sleeved with a sleeve hole of a counter-force mainboard.
Compared with the prior art, the utility model can support the counter-force mainboard before and after the pile foundation test through the arrangement of the support frame, which is beneficial to improving the safety and stability of the device; by adopting the threaded connection mode of the supporting rod and the supporting sleeve, the matching degree between the jack and the pile to be tested can be conveniently adjusted for the piles to be tested with different heights, the device can adapt to pile foundation tests with different heights, and the flexibility and the adaptability of the device are improved; the device adopts a split scheme, so that the mounting difficulty is reduced, the rapid mounting on a construction site is facilitated, the labor intensity is reduced, and the test working efficiency is improved; the positioning rod in threaded connection with the structural ring is designed, so that the reaction main board can be quickly and accurately positioned when being installed, the working limit position of the device can be observed conveniently when the tested pile is tested, a certain safety protection effect is achieved, and the safety and practicability of the device are improved; root-expanded large-scale auxiliary piles are uniformly arranged on the periphery of the device, and a hinge connection mode of prestressed steel strands and main board pull lugs is adopted, so that the balance and centering performance of the system are improved, the installation is convenient, and the test is reliable; the design adopts a building block type building scheme, and each part is simple to install, convenient to disassemble, easy to transport, low in cost and strong in adaptability, and can save various resource consumption.
Drawings
Fig. 1 is an overall schematic diagram of a pile foundation compression-resistant static load test counterforce device.
Fig. 2 is a schematic structural view of an auxiliary pile of a counter-force device for a pile foundation compression-resistant static load test.
Fig. 3 is a schematic diagram of a supporting sleeve and a supporting rod of a counter-force device for a pile foundation compression-resistant static load test.
Fig. 4 is a schematic diagram of a structural ring and a positioning rod of a pile foundation compression-resistant static load test counterforce device.
Wherein, 1, auxiliary piles; 1-1, enlarged root; 1-2, auxiliary pile main bodies; 2. the semicircular ring supports the base; 3. pre-stressed steel strands; 4. a pile to be measured; 5. a jack; 6. a counter-force main board; 7. trepanning; 8. a sighting hole; 9. a main board hoisting ring; 10. pulling lugs on the main board; 11. a ground nut; 12. a support sleeve; 13. a support bar; 14. a top end nut; 15. a structural ring; 16. a light hole; 17. and (5) positioning the rod.
Detailed Description
Example 1:
as shown in the attached drawings 1-4, the pile foundation compression resistance static load test counterforce device comprises a counterforce main plate 6 acting on a tested pile 4, auxiliary piles 1 are uniformly arranged around the counterforce main plate 6, the auxiliary piles 1 and the counterforce main plate 6 are movably connected and used for bearing tension between the auxiliary piles 1 and the counterforce main plate 6, a jack 5 for applying test force to the tested pile 4 is arranged below the counterforce main plate 6, and a force measuring device is fixed at one end of the jack 5.
The force measuring device is arranged between the counter force main plate 6 and the jack 5 or below the jack 5.
The auxiliary piles 1 are arranged in 4-12 numbers, the auxiliary piles 1 are sequentially and uniformly pre-cast and enlarged in the large root portions 1-1 around the tested pile 4, the tops of the enlarged root portions 1-1 are fixedly connected with auxiliary pile main bodies 1-2, and the prestressed steel strands 3 are bound on the auxiliary pile main bodies 1-2.
The auxiliary pile 1 and the reaction main board 6 are movably connected through a prestressed steel strand 3, the auxiliary pile 1 is used for bearing tension between the auxiliary pile 1 and the reaction main board 6, and the other end of the prestressed steel strand 3 bound on the auxiliary pile main body 1-2 is movably connected with a main board pull lug 10 arranged on the reaction main board 6.
The bottom of the counter-force main board 6 is provided with a supporting device, which is beneficial to the installation of the prestressed steel strand 3, and the counter-force main board 6, the jack 5, the tested pile 4, the prestressed steel strand 3 and the connecting component thereof form a counter-force frame system.
The strutting arrangement bottom is semicircle ring support base 2, semicircle ring support base 2 has the semicircle ring bearing structure of fixed pin and hole and equipartition 6 unthreaded holes respectively by a pair of both ends to constitute, two semicircle ring bearing structure are through corresponding round pin and hole zonulae occludens, bear the weight of each part of entire system around being surveyed the stake 4 is experimental, through setting up round pin and hole, can be easy to assemble and dismantle semicircle ring support base 2, semicircle ring support base 2 passes through lower margin nut 11 and connects support sleeve 12, support sleeve 12 and bracing piece 13 pass through threaded connection, according to the cooperation degree between height adjustment support sleeve 12 of being surveyed stake 4 and bracing piece 13, and then guarantee to have suitable spatial distance between counter-force mainboard 6 and the stake 4 being surveyed, can adjust the levelness of counter-force mainboard 6 simultaneously. The other end of the support rod 13 is provided with a positioning structure, and a structural ring 15 and each support member are fastened together through the compression effect of a top end nut 14 connected with threads. The equipartition has 6 unthreaded holes 16 on the structure ring 15, is provided with bellied platform with 6 unthreaded hole 16 interval equidistance, the platform is higher than bracing piece 13 upper end, mainly bears the weight of counter-force mainboard 6, and bracing piece 13 is worn to be equipped with by 6 unthreaded holes 16 of structure ring 15 to fasten through top nut 14, constitute the bearing structure of counter-force mainboard 6. The structure ring 15 evenly is provided with 3 screws on the boss of interval equipartition, screw threaded connection locating lever 17, and reaction mainboard 6 is cup jointed to locating lever 17 surface, and locating lever 17 passes the trepanning 7 of reaction mainboard 6, plays the location guide effect when reaction mainboard 6 installation is taken one's place, when being surveyed the stake 4 atress, through observing the length that locating lever 17 passes through reaction mainboard 6 trepanning 7, comes in time to uninstall pressure, plays the safety protection effect.
The working process of the utility model is as follows:
(1) sequentially and uniformly pre-pouring auxiliary piles 1 bound with prestressed steel strands 3 around the tested pile 4;
(2) cleaning sundries around the tested pile 4, and processing the sundries smoothly;
(3) the two semicircular supporting bases 2 are annularly surrounded on the periphery of the tested pile 4 and are firmly lapped through the pin holes;
(4) the supporting sleeves 12 are respectively installed according to the corresponding six screw holes;
(5) sequentially screwing the six support rods 13 into the corresponding support sleeves 12, and adjusting the heights of the support rods 13 according to the height of the pile 4 to be measured and the matching degree of the jack 5;
(6) sleeving the light holes 16 of the structural ring 15 into the six support rods 13, finely adjusting the structural ring 15 to keep the structural ring horizontal, and tightly pressing the structural ring by using a top nut 14;
(7) the positioning rod 17 is screwed into three screw holes of the structural ring 15 in depth in sequence;
(8) hoisting the counter-force mainboard 6 to the upper surface of the structural ring 5 by using a hoisting tool, and slightly sleeving the positioning rod 17 into the three sleeve holes 7 of the counter-force mainboard 6 at the beginning;
(9) the jack 5 is placed on the platform of the pile 4 to be measured, the force measuring device is fixed at the top of the jack 5, and the position of the jack 5 is adjusted by observing the brightness of the aiming hole 8, so that the jack 5 and the reaction main board 6 are kept in alignment;
(10) sequentially connecting the prestressed steel strands 3 on the auxiliary piles 1 with the main plate pull lugs 10 of the counter-force main plate in place, and adjusting to keep the auxiliary piles at proper tightness;
(11) starting the test according to the standard requirements;
the disassembly is carried out in reverse according to the steps.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims (6)

1. The utility model provides a pile foundation resistance to compression static test counterforce device, is including acting on the counterforce mainboard of the stake of being surveyed, its characterized in that evenly sets up around the counterforce mainboard and assists the stake, assists stake and counterforce mainboard swing joint and is used for bearing the pulling force of assisting between stake and the counterforce mainboard, sets up the jack of exerting the testing force to the stake of being surveyed under the counterforce mainboard, and force measuring device is fixed to jack one end.
2. The pile foundation compression resistance static load test counterforce device of claim 1, characterized in that: the force measuring device is arranged between the counter-force main plate and the jack or below the jack.
3. The pile foundation compression resistance static load test counterforce device of claim 1, characterized in that: the auxiliary piles are 4-12.
4. The pile foundation compression resistance static load test counterforce device of claim 1, characterized in that: the auxiliary pile and the reaction main board are movably connected and used for bearing tension between the auxiliary pile and the reaction main board, and the auxiliary pile and the reaction main board are connected through a prestressed steel strand which is used for bearing the tension between the auxiliary pile and the reaction main board.
5. The pile foundation compression resistance static load test counterforce device of claim 1, characterized in that: and a supporting device is arranged below the edge of the counter-force main board and is used for supporting the counter-force main board, so that the prestressed steel strand is convenient to install.
6. The pile foundation compression resistance static load test counterforce device of claim 5, characterized in that: the bottom of the supporting device is provided with a base which is connected with two half rings which are equivalent to each other through pin holes, the half rings are connected with the top of the base through supporting sleeves which are connected through foundation nuts, the supporting sleeves are in threaded connection with one ends of supporting rods, the other ends of the supporting rods are fixedly connected with a structural ring through top nuts, the top of the structural ring is provided with a positioning rod, and the outer surface of the positioning rod is sleeved with a sleeve hole of a counter-force mainboard.
CN202120757153.6U 2021-04-14 2021-04-14 Pile foundation static load test counterforce device Active CN215165892U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120757153.6U CN215165892U (en) 2021-04-14 2021-04-14 Pile foundation static load test counterforce device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120757153.6U CN215165892U (en) 2021-04-14 2021-04-14 Pile foundation static load test counterforce device

Publications (1)

Publication Number Publication Date
CN215165892U true CN215165892U (en) 2021-12-14

Family

ID=79357153

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120757153.6U Active CN215165892U (en) 2021-04-14 2021-04-14 Pile foundation static load test counterforce device

Country Status (1)

Country Link
CN (1) CN215165892U (en)

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