CN112854317A - Auxiliary clamp for uplift test of cast-in-place pile - Google Patents
Auxiliary clamp for uplift test of cast-in-place pile Download PDFInfo
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- CN112854317A CN112854317A CN202110033530.6A CN202110033530A CN112854317A CN 112854317 A CN112854317 A CN 112854317A CN 202110033530 A CN202110033530 A CN 202110033530A CN 112854317 A CN112854317 A CN 112854317A
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- cast
- place pile
- force transmission
- screw rod
- auxiliary clamp
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The application relates to the technical field of cast-in-place pile detection equipment, in particular to an auxiliary clamp for a cast-in-place pile uplift test, which comprises a cast-in-place pile; the support piers are arranged on two sides of the cast-in-place pile; the beam is erected at the top of the buttress and suspended above the cast-in-place pile; jacks arranged on two sides of the bottom of the cross beam; a force transmission screw rod with one end arranged on the beam and the other end vertically suspended above the cast-in-place pile; the end part of the force transmission screw rod, which is far away from the cross beam, is provided with a connecting assembly; be equipped with embedded steel bar in the bored concrete pile, embedded steel bar passes through coupling assembling with pass power screw rod and be connected. The application is favorable for guaranteeing the stress uniformity of each embedded steel bar, so that the condition that part of the embedded steel bars are broken in advance due to uneven stress is reduced, and the true condition of the cast-in-place pile can be accurately reflected by a resistance-pull test.
Description
Technical Field
The application relates to the technical field of cast-in-place pile detection equipment, in particular to an auxiliary clamp for a cast-in-place pile uplift test.
Background
The cast-in-place pile is formed by in-place hole forming and reinforced concrete pouring, the uplift pile is supported and pulled by steel bars, but the uplift performance of the pile is realized by the friction between a pile body and soil, the condition of the uplift performance of the cast-in-place pile can be obtained only by carrying out a field load test, namely, the uplift force of the cast-in-place pile is detected by the uplift test.
The existing Chinese patent with publication number CN203229974U discloses a large-tonnage uplift cast-in-place pile uplift test device, which comprises a pile cap, pre-embedded steel bars, a girder, a jack, a screw rod, reaction small beams and hanging beams, wherein the pre-embedded steel bars in the pile cap, the girder are supported on supporting piles (piers) at two sides of a test pile, the jack is placed on the girder, and the screw rod is connected with the pre-embedded steel bars through the reaction small beams and the hanging beams.
With respect to the related art among the above, the inventors consider that the following technical drawbacks exist: in the technical scheme, the embedded steel bars are directly connected with the screw rods, so that the stress of each embedded steel bar is uneven easily, the condition that part of the steel bars are broken in advance is caused, and the real condition of the cast-in-place pile cannot be completely reflected. For this reason, further improvement is awaited.
Disclosure of Invention
In order to improve the atress degree of consistency of each embedded steel bar, this application provides an auxiliary clamp for bored concrete pile resistance to plucking is experimental.
The application provides an auxiliary clamp for bored concrete pile resistance to plucking test adopts following technical scheme:
an auxiliary clamp for a cast-in-place pile uplift test comprises a cast-in-place pile; the support piers are arranged on two sides of the cast-in-place pile; the beam is erected at the top of the buttress and suspended above the cast-in-place pile; jacks arranged on two sides of the bottom of the cross beam; a force transmission screw rod with one end arranged on the beam and the other end vertically suspended above the cast-in-place pile; the end part of the force transmission screw rod, which is far away from the cross beam, is provided with a connecting assembly; be equipped with embedded steel bar in the bored concrete pile, embedded steel bar passes through coupling assembling with pass power screw rod and be connected.
Through adopting above-mentioned technical scheme, when experimental, make jack work with the crossbeam jack-up, set up and consequently receive ascending pulling force on the crossbeam biography power screw rod to act on the embedded steel bar on the bored concrete pile with this pulling force through coupling assembling, thereby reach and carry out the experimental purpose of resistance to plucking to the bored concrete pile. Under coupling assembling's effect, pass the power screw rod and not directly be connected with embedded steel bar, be favorable to guaranteeing the atress degree of consistency of each embedded steel bar to a certain extent to reduce part in advance the reinforcing bar because the inhomogeneous condition of breaking in advance that appears of atress takes place, thereby make the true condition that the resistance to plucking test can more accurately reflect the bored concrete pile.
Optionally, coupling assembling includes welded plate, biography power board and connecting seat, the welded plate with the connecting seat passes through the biography power board is connected, set up the through-hole that supplies embedded bar to pass on the welded plate, embedded bar passes the through-hole from bottom to top and welds in on the welded plate, pass the power screw rod and keep away from the one end of crossbeam can dismantle set up in on the connecting seat.
Through adopting above-mentioned technical scheme, under the effect of welded plate, biography power board and connecting seat, be connected embedded steel bar with biography power screw rod, embedded steel bar welds on the welded plate one-to-one corresponding to the through-hole on the welded plate, is favorable to guaranteeing the tensile degree of consistency that each embedded steel bar received to reduce the part in advance reinforcing bar because the inhomogeneous emergence of atress is cracked the condition in advance takes place, thereby makes the true condition that anti-pulling test can more accurately reflect the bored concrete pile.
Optionally, two sides of the connecting seat are provided with first clamping grooves, the end portion of the force transmission screw rod is provided with a clamping connector, and the force transmission screw rod is detachably arranged on the connecting seat through the matching of the first clamping grooves and the clamping connector.
Through adopting above-mentioned technical scheme, under first draw-in groove and joint's combined action, will pass the power screw rod and can dismantle the restriction on the connecting seat, reduce the condition emergence that passes the power screw rod and drop from the connecting seat in the test process, guaranteed experimental reliability, simultaneously, also be convenient for the staff after experimental completion carries out the dismouting, be favorable to guaranteeing staff's work efficiency to a certain extent.
Optionally, a force transfer beam is arranged at the top of the cross beam, the length direction of the force transfer beam is perpendicular to the length direction of the cross beam, and one end, far away from the connecting seat, of the force transfer screw rod is detachably arranged at two ends of the force transfer beam.
By adopting the technical scheme, the force transmission screw is arranged on the cross beam under the action of the force transmission beam, and when the cross beam is jacked upwards under the action of the jack, the upward acting force acts on the force transmission beam firstly, and then is transmitted to the two ends of the force transmission beam and acts on the force transmission screw. In the process, the symmetry of the tensile force required by the test is ensured by the arranged force transfer beam, the uniformity of the tensile force applied to the embedded steel bars is favorably ensured, the condition that part of the embedded steel bars are broken in advance due to uneven stress is reduced, and the true condition of the cast-in-place pile can be accurately reflected by the anti-pulling test.
Optionally, two ends of the force transmission beam are provided with second clamping grooves, and the force transmission screw rod is detachably arranged on the force transmission beam through the matching of the second clamping grooves and the clamping joints.
Through adopting above-mentioned technical scheme, under the combined action of second draw-in groove and joint, will pass the power screw rod and can dismantle the restriction on biography power roof beam, reduce the condition emergence that passes the power screw rod and drop from passing the power roof beam in the test process, guaranteed experimental reliability, simultaneously, also be convenient for the staff after experimental completion carries out the dismouting, be favorable to guaranteeing staff's work efficiency to a certain extent.
Optionally, a locking piece for locking the force transfer screw rods located at the two ends of the force transfer beam is arranged on the joint close to the end of the force transfer beam on the force transfer screw rod.
By adopting the technical scheme, under the action of the locking piece, the clamping connector on the force transmission screw rod is limited in the corresponding second clamping groove, so that the situation that the force transmission screw rod falls off from the force transmission beam in the test process is reduced, and the reliability of the test process is ensured.
Optionally, the locking member comprises an electric telescopic rod.
Through adopting above-mentioned technical scheme, under electric telescopic handle's effect, the joint on will passing the power screw rod is restricted in the second draw-in groove that corresponds, and simultaneously, operating personnel can adjust the interval of two biography power screw rods according to actual conditions.
Optionally, the locking element comprises a cord.
By adopting the technical scheme, the two ends of the rope are respectively fixed on the two force transmission screw rods on the same force transmission beam, so that the situation that the force transmission screw rods fall off from the force transmission beam in the test process is reduced, and the reliability of the test process is ensured.
Optionally, the welding plate is a circular plate structure.
Through adopting above-mentioned technical scheme, set up the welded plate into circular plate structure, make effort evenly distributed to each embedded steel bar, be favorable to guaranteeing the tensile degree of consistency that each embedded steel bar received to reduce the part in advance reinforcing bar and take place owing to the inhomogeneous condition of fracture appears in advance of atress, thereby make the true condition that the resistance to plucking test can more accurately reflect the bored concrete pile.
Optionally, the number of the cross beams is two, and the number of the jacks is four.
By adopting the technical scheme, the two cross beams are arranged, the four jacks are arranged, the counter-force area is increased, and the stress uniformity of the embedded steel bars is guaranteed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. under the action of the connecting component, the force transmission screw rod is not directly connected with the embedded steel bars, so that the stress uniformity of each embedded steel bar is ensured to a certain extent, the condition that part of the embedded steel bars are broken in advance due to nonuniform stress is reduced, and the true condition of the cast-in-place pile can be accurately reflected by an anti-pulling test;
2. under the combined action of the welding plate, the force transmission plate and the connecting seat, the force transmission screw is connected with the embedded steel bars, so that the uniformity of the tensile force applied to each embedded steel bar is guaranteed;
3. under the combined action of the clamping head, the first clamping groove and the second clamping groove, the detachable installation of the force transmission screw rod is realized, and the work efficiency of workers is guaranteed to a certain extent.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a front view of an embodiment of the present application;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of the construction of a force-transmitting screw according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a connecting assembly in an embodiment of the present application;
FIG. 6 is a schematic view of another view of a connecting assembly according to an embodiment of the present disclosure;
fig. 7 is an enlarged view of a portion B in fig. 1.
Description of reference numerals: 1. filling piles; 11. embedding reinforcing steel bars in advance; 2. supporting piers; 3. a cross beam; 4. a jack; 5. a force transmission screw rod; 51. a clamping head; 61. welding the plate; 611. a through hole; 62. a force transmission plate; 63. a connecting seat; 631. a first card slot; 7. a transfer beam; 71. a second card slot; 8. an electric telescopic rod.
Detailed Description
In order to make the purpose, technical solution and advantages of the present application more clear, the present application is further described in detail below with reference to fig. 1 to 7 and the embodiments.
The embodiment of the application discloses an auxiliary clamp for bored concrete pile resistance to plucking test, refer to fig. 1 and 2, an auxiliary clamp for bored concrete pile 1 resistance to plucking test includes bored concrete pile 1 tested, support pier 2, crossbeam 3, jack 4, biography power screw rod 5, coupling assembling and biography power piece.
Referring to fig. 2 and 3, the cast-in-place pile 1 is provided with embedded steel bars 11, and the end parts of the embedded steel bars 11 extend out of the top of the cast-in-place pile 1; the support piers 2 comprise two seats, and the two support piers 2 are respectively positioned at two sides of the cast-in-place pile 1; the cross beam 3 is erected on the tops of the two support piers 2 and is positioned above the cross beam 3, in the embodiment, the cross beam 3 comprises two cross beams, and the two cross beams 3 are arranged on the tops of the support piers 2;
referring to fig. 2, the jacks 4 are arranged at the bottoms of the cross beams 3, each cross beam 3 corresponds to two jacks 4, the two jacks 4 are symmetrically arranged at two sides of the bottom of the cross beam 3, and the output ends of the jacks 4 are abutted to the bottom of the cross beam 3; coupling assembling sets up respectively in the both ends of biography power screw rod 5 with passing power the piece, passes that power screw rod 5 is vertical to be hung in bored concrete pile 1 top, and passes the embedded bar 11 that coupling assembling and bored concrete pile 1 was connected to the one end of power screw rod 5, and the one end that passes power screw rod 5 and keep away from embedded bar 11 sets up on crossbeam 3 through passing power the piece.
When testing, make jack 4 work and jack up crossbeam 3, under the effect of biography power piece, pass power screw rod 5 and receive ascending pulling force to act on the embedded steel bar 11 on bored concrete pile 1 with this pulling force through coupling assembling, carry out resistance to plucking test to bored concrete pile 1 according to this way.
Referring to fig. 4, the two ends of the force transmission screw 5 are both fixed with the clamping joints 51, the clamping joints 51 are generally rectangular blocks, and the side lines of the clamping joints 51 far away from the force transmission screw 5 are both provided with chamfers, so that the possibility that an operator is scratched by the corners of the clamping joints 51 is reduced.
Referring to fig. 5 and 6, the connecting assembly in this embodiment includes a welding plate 61, a force transmission plate 62, and a connecting seat 63, and the welding plate 61 and the connecting seat 63 are connected by the force transmission plate 62. The welding plate 61 is a circular plate structure, the welding plate 61 is provided with a through hole 611 for the embedded steel bar 11 to pass through, and the embedded steel bar 11 passes through the through holes 611 on the welding plate 61 one by one from bottom to top and is welded on the welding plate 61. Biography power board 62 vertical fixation deviates from embedded bar 11 one side in welded plate 61, and biography power board 62 is radial outwards and be fixed in welded plate 61 on, and biography power board 62 is close to welded plate 61 one side and has seted up U type groove, and the notch in U type groove is towards welded plate 61.
In this embodiment, the force transmission plate 62 includes a plurality of blocks, and the plurality of force transmission plates 62 are arranged on the welding plate 61 in a circumferential array with the center of the welding plate 61 as the center of a circle. The connecting seat 63 is fixed on the side of the force transmission plate 62 away from the welding plate 61, and the center of the connecting seat 63 and the center of the welding plate 61 are located on the same vertical line. One end of the force transmission screw rod 5, which is far away from the cross beam 3, is detachably arranged on the connecting seat 63.
Referring to fig. 5 and 6, the cross section of the connecting seat 63 is square, a grid structure is hollowed out on the connecting seat 63, and first clamping grooves 631 engaged with the clamping connectors 51 on the force transmission screw 5 are disposed on two opposite sides of the connecting seat 63, so that the force transmission screw 5 is detachably mounted on the connecting seat 63 through the cooperation of the first clamping grooves 631 and the clamping connectors 51.
Through the welding plate 61, biography power board 62 and the connecting seat 63 that set up, be connected embedded steel bar 11 with biography power screw rod 5, improved every embedded steel bar 11 atress degree of consistency to reduce partial embedded steel bar 11 because the inhomogeneous condition that breaks in advance that appears of atress takes place in advance, thereby make the true condition that the resistance to plucking experiment can more accurately reflect bored concrete pile 1.
Referring to fig. 1 and 7, the force transmission member in this embodiment includes a force transmission beam 7, the force transmission beam 7 is installed on the top of the cross beam 3, the length direction of the force transmission beam 7 is perpendicular to the length direction of the cross beam 3, two ends of the force transmission beam 7 are suspended above the connecting seat 63, and the end of the force transmission screw 5 away from the connecting seat 63 is detachably disposed on the end of the force transmission beam 7.
Referring to fig. 1 and 7, a second locking groove 71 engaged with the locking joint 51 on the force transfer screw 5 is formed at the end of the force transfer beam 7, so that the force transfer screws 5 are detachably mounted on the force transfer beam 7 by the cooperation of the second locking groove 71 and the locking joint 51, each force transfer beam 7 corresponds to two force transfer screws 5, and the two force transfer screws 5 are symmetrically mounted at two ends of the force transfer beam 7.
Referring to fig. 1, to reduce the possibility of the transfer screws 5 falling off the transfer beam 7 during the test, a locking element is provided between two transfer screws 5 on the same transfer beam 7. The locking member may be a rope or the like, as long as the end of the force transmission screw 5 is limited in the second engaging groove 71.
Referring to fig. 1, the locking member in this embodiment is specifically configured as an electric telescopic rod 8, an axial direction of the electric telescopic rod 8 is consistent with a length direction of the force transmission beam 7, the electric telescopic rod 8 is fixed to the clamping joint 51 of one of the force transmission screw rods 5, and an output end of the electric telescopic rod 8 is fixed to the clamping joint 51 of the other force transmission screw rod 5, so that an operator can adjust a distance between the two force transmission screw rods 5 according to actual conditions and limit the clamping joint 51 in the corresponding second clamping groove 71.
The implementation principle of the auxiliary clamp for the uplift test of the cast-in-place pile is as follows: referring to fig. 1 and 2, the present embodiment includes four transfer beams 7 and eight transfer screws 5. During the experiment, firstly, the embedded steel bars 11 pass through the through holes 611 on the welding plate 61 one by one, the embedded steel bars 11 are welded on the welding plate 61, then the eight force transmission screws 5 are divided into two groups, and the two groups of force transmission screws 5 are symmetrically arranged on two sides of the cross beam 3, so that the clamping head 51 of the force transmission screw 5 is clamped in the first clamping groove 631 on the connecting seat 63, then the force transmission beam 7 is placed corresponding to the position of the force transmission screw 5, and the clamping head 51 of the force transmission screw 5 far away from the connecting seat 63 is clamped in the second clamping groove 71 on the corresponding force transmission beam 7. Finally, the jack 4 is enabled to work to jack up the cross beam 3, the force transmission screw 5 is subjected to upward pulling force under the action of the force transmission beam 7, the pulling force acts on the embedded steel bars 11 on the cast-in-place pile 1 through the connecting seat 63, the force transmission plate 62 and the welding plate 61, the embedded steel bars 11 are accordingly subjected to drawing action, and the anti-pulling test on the cast-in-place pile 1 is completed in this way.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. An auxiliary clamp for a cast-in-place pile uplift test comprises: a cast-in-place pile (1); the support piers (2) are arranged on two sides of the cast-in-place pile (1); the cross beam (3) is erected at the top of the support pier (2) and is suspended above the cast-in-place pile (1); jacks (4) arranged on two sides of the bottom of the cross beam (3); a force transmission screw rod (5) with one end arranged on the beam (3) and the other end vertically suspended above the cast-in-place pile (1); the method is characterized in that: the end part of the force transmission screw rod (5) far away from the cross beam (3) is provided with a connecting assembly; be equipped with embedded steel bar (11) in bored concrete pile (1), embedded steel bar (11) pass through coupling assembling with biography power screw rod (5) are connected.
2. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 1, characterized in that: coupling assembling includes welded plate (61), dowel steel (62) and connecting seat (63), welded plate (61) with connecting seat (63) pass through dowel steel (62) are connected, set up through-hole (611) that supply embedded bar (11) to pass on welded plate (61), embedded bar (11) are by down up passing through-hole (611) and weld in on welded plate (61), biography power screw rod (5) are kept away from the one end of crossbeam (3) can be dismantled set up in on connecting seat (63).
3. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 2, is characterized in that: the both sides of connecting seat (63) are provided with first draw-in groove (631), the tip of biography power screw rod (5) is provided with joint (51), through first draw-in groove (631) with the cooperation of joint (51) will pass power screw rod (5) can dismantle set up in on connecting seat (63).
4. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 3, wherein: the top of the cross beam (3) is provided with a force transfer beam (7), the length direction of the force transfer beam (7) is perpendicular to the length direction of the cross beam (3), and one end, far away from the connecting seat (63), of the force transfer screw (5) is detachably arranged at two ends of the force transfer beam (7).
5. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 4, wherein: and second clamping grooves (71) are formed in two ends of the force transmission beam (7), and the force transmission screw rod (5) is detachably arranged on the force transmission beam (7) through the matching of the second clamping grooves (71) and the clamping joints (51).
6. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 5, wherein: the force transmission screw (5) is close to a locking piece used for locking the force transmission screws (5) positioned at the two ends of the force transmission beam (7) and arranged on a clamping joint (51) at the end part of the force transmission beam (7).
7. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 6, wherein: the locking piece comprises an electric telescopic rod (8).
8. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 7, wherein: the locking element comprises a cord.
9. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 8, wherein: the welding plate (61) is of a circular plate structure.
10. The auxiliary clamp for the cast-in-place pile pulling resistance test according to claim 9, wherein: the number of the cross beams (3) is two, and the number of the jacks (4) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033530.6A CN112854317A (en) | 2021-01-12 | 2021-01-12 | Auxiliary clamp for uplift test of cast-in-place pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033530.6A CN112854317A (en) | 2021-01-12 | 2021-01-12 | Auxiliary clamp for uplift test of cast-in-place pile |
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| Publication Number | Publication Date |
|---|---|
| CN112854317A true CN112854317A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110033530.6A Pending CN112854317A (en) | 2021-01-12 | 2021-01-12 | Auxiliary clamp for uplift test of cast-in-place pile |
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| CN (1) | CN112854317A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435207A (en) * | 2008-12-24 | 2009-05-20 | 关喜才 | Uplift pile loading test method and apparatus |
| CN103015464A (en) * | 2012-11-28 | 2013-04-03 | 中交上海三航科学研究院有限公司 | Pile top restraint device and method for horizontal load test |
| CN206873516U (en) * | 2017-06-05 | 2018-01-12 | 浙江有色地球物理技术应用研究院 | A kind of power conversion device and apply its uplift pile equipment |
| CN210104826U (en) * | 2019-06-14 | 2020-02-21 | 湖北精之源建设工程质量检测有限公司 | Uplift resistance device for cast-in-place pile |
-
2021
- 2021-01-12 CN CN202110033530.6A patent/CN112854317A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435207A (en) * | 2008-12-24 | 2009-05-20 | 关喜才 | Uplift pile loading test method and apparatus |
| CN103015464A (en) * | 2012-11-28 | 2013-04-03 | 中交上海三航科学研究院有限公司 | Pile top restraint device and method for horizontal load test |
| CN206873516U (en) * | 2017-06-05 | 2018-01-12 | 浙江有色地球物理技术应用研究院 | A kind of power conversion device and apply its uplift pile equipment |
| CN210104826U (en) * | 2019-06-14 | 2020-02-21 | 湖北精之源建设工程质量检测有限公司 | Uplift resistance device for cast-in-place pile |
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Application publication date: 20210528 |