CN210946798U - Pile tip of prestressed concrete hollow square pile - Google Patents

Pile tip of prestressed concrete hollow square pile Download PDF

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Publication number
CN210946798U
CN210946798U CN201921627559.1U CN201921627559U CN210946798U CN 210946798 U CN210946798 U CN 210946798U CN 201921627559 U CN201921627559 U CN 201921627559U CN 210946798 U CN210946798 U CN 210946798U
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China
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pile
cap
pedestal
steel
reinforcing bar
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索青博
杨东
张建华
丁林
杨超
赵杰
尤闯
陈露
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China Southwest Architectural Design and Research Institute Co Ltd
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China Southwest Architectural Design and Research Institute Co Ltd
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Abstract

The patent of the utility model discloses a stake point of hollow square pile of prestressed concrete, concretely relates to building construction equipment's technical field. The pile tip of the prestressed concrete hollow square pile comprises a pedestal and a pile cap, wherein the pedestal is enclosed by four steel plates to form a rectangular square frame, the top of the pedestal is provided with a connecting plate, and the center of the connecting plate is provided with a through hole for connecting a pile body; pile cap adopts four first reinforcing bars to enclose to close and forms four pyramids, four the free end setting of first reinforcing bar is in the pedestal, four the cladding has four pyramids's steel cap in the link of first reinforcing bar, the pointed end of steel cap runs through there is the second reinforcing bar, the second reinforcing bar still runs through the one end of pile cap, the regional intussuseption that pedestal, pile cap and steel cap enclose jointly and close is filled with the concrete. Adopt the utility model discloses technical scheme has overcome and has easily appeared exploding the cracked problem of stake and pile body in the current work progress, can be used to the foundation pile of construction.

Description

Pile tip of prestressed concrete hollow square pile
Technical Field
The utility model relates to a building construction equipment's technical field, in particular to stake point of hollow square pile of prestressed concrete.
Background
With the pace of the urbanization process in China being accelerated, the development and utilization of underground space are developed rapidly, more and more buildings (structures) with the requirement of controlling settlement are built, foundation burial depth is deeper and deeper, and the stability problem of the underground structure is more and more prominent. The underground structure problem of the existing engineering is generally solved by adopting a pile foundation form, and the pile bearing the vertical force is called.
The prefabricated prestressed concrete pile has the advantages of good pile body quality, low engineering cost, green and environment-friendly construction, convenient pile body detection, industrial production and the like, is more and more widely used in the field of building engineering pile foundations, and becomes a preferred pile type of the pile foundation. When the prestressed reinforcement pile is used for building pile foundations, the pile body can not crack in an effective prestress range, prestressed reinforcement protection is good, pile body strength can be well exerted, and pile body bearing capacity is improved.
At present, the soil layer can enter the inner cavity of the tubular pile because the bottom is not sealed conventionally, and along with more and more soil entering the tubular pile, the soil can not enter the tubular pile to a certain degree, so that a soil plug effect is formed, and the problem of pile explosion and pile body fracture is easily caused by the soil plug effect.
SUMMERY OF THE UTILITY MODEL
The utility model provides a stake point of hollow square pile of prestressed concrete to easily appear exploding the cracked problem of stake and pile body in solving current work progress.
In order to achieve the above object, the basic scheme of the present invention is as follows: the pile tip of the prestressed concrete hollow square pile comprises a pedestal and a pile cap, wherein the pedestal is enclosed by four steel plates to form a rectangular square frame, the top of the pedestal is provided with a connecting plate, and the center of the connecting plate is provided with a through hole for connecting a pile body; pile cap adopts four first reinforcing bars to enclose to close and forms four pyramids, four the free end setting of first reinforcing bar is in the pedestal, four the cladding has four pyramids's steel cap in the link of first reinforcing bar, the pointed end of steel cap runs through there is the second reinforcing bar, the second reinforcing bar still runs through the one end of pile cap, the regional intussuseption that pedestal, pile cap and steel cap enclose jointly and close is filled with the concrete.
The principle and the effect of the technical scheme are as follows: the pile tip and the pile body are connected together by reinforced concrete through the through hole on the connecting plate, and the axis is kept coincident when the pile tip and the pile body are connected. In the piling process, the pile tip accelerates the piling efficiency by virtue of concrete and a steel cap in the pile tip; when meeting hard stratum in the piling process, the steel cap can provide self deformation to offset part of impact force, and the concrete in the pile tip and the steel cap can uniformly transmit the impact force to the pile body, so that the condition of pile body fracture or burst is avoided.
Further, the strength of the concrete adopts a high mark of C60 and above. The strength of the pile tip is improved by adopting high-strength concrete, so that the piling speed is accelerated.
Furthermore, a plurality of third steel bars are connected in the concrete.
Furthermore, one end of each third steel bar is arranged in a bending mode.
Through the arrangement, the pile body and the pile tip are connected together by means of the third steel bars and the concrete in the pile body, and the connection strength is improved by means of the bending arrangement of the third steel bars.
The beneficial effect of this scheme: 1. the pile breaking probability is reduced, and the penetration capacity of the pile to the soil layer during pile driving is improved; 2. the problems of pile head damage and pile body inclination are avoided in the piling process, and the pile can well enter the bearing stratum; 3. the stress of the pile end is balanced, the pile can be regarded as a relatively homogeneous material, the soil-entering end of the foundation pile can bear very complicated stress action under the combined action of the impact force of a pile hammer, the self-gravity of the foundation pile and the counter-force of the soil layer in the process that the foundation pile enters the soil layer, the sizes of all parts are different, after the pile tip is added, a medium with enough strength is added between the pile body and the soil layer, the acting force is relatively uniformly transmitted to the pile body after being neutralized by the pile tip, and the situation that the pile body is damaged due to overlarge local stress is avoided; 4. in the piling process, the steel cap of the pile tip absorbs partial impact force through self deformation, so that the pile body is not damaged; and when the geological soil layer mutates, huge impact energy can not directly act on the pile body, and the pile explosion phenomenon is effectively reduced.
Drawings
FIG. 1 is a schematic structural view of a pile tip of a prestressed concrete hollow square pile of the present invention;
fig. 2 is a plan view of the pile tip of the prestressed concrete hollow square pile of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments:
reference numerals in the drawings of the specification include: pedestal 1, connecting plate 2, first through-hole 3, second through-hole 4, steel cap 5, first reinforcing bar 6, second reinforcing bar 7, third reinforcing bar 8.
The embodiment is substantially as shown in figures 1 and 2: the utility model provides a stake point of hollow square pile of prestressed concrete, including pedestal 1 and pile cap, pedestal 1 is enclosed by four steel sheets and closes the rectangle square frame that forms, four steel sheets adopt the mode of full weld to link together two liang, the top welding of pedestal 1 has connecting plate 2, connecting plate 2 is a square steel sheet, connecting plate 2 can seal pedestal 1's top, open at connecting plate 2's center has the first through-hole 3 that supplies the pile body to connect, still open around connecting plate 2 has a plurality of second through-holes 4, it has prestressed reinforcement all to peg graft in every second through-hole 4, can improve the crack resistance nature of stake point and pile body with the help of prestressed reinforcement.
Pile cap adopts four first reinforcing bars 6 to enclose to close and forms four pyramids, the upper end welding of four first reinforcing bars 6 is in pedestal 1, the cladding has four pyramids's steel cap 5 in four first reinforcing bar 6's the link, steel cap 5 is steel sheet thickness and is not less than 5 cm's steel sheet, the bottom of steel cap 5 is run through and is had second reinforcing bar 7, the bottom of pile cap is still run through to second reinforcing bar 7, pedestal 1, pile cap and steel cap 5 enclose jointly that the regional intussuseption that closes is filled with the concrete, the intensity of concrete adopts C60 and above high-grade number. The strength of the pile tip is improved by adopting high-strength concrete, so that the piling speed is accelerated. Four third reinforcing bars 8 are inserted in the concrete at equal intervals in the circumferential direction, the upper end of each third reinforcing bar 8 is bent, and the third reinforcing bars 8 can be integrally in an L shape, so that the pile body and the pile tip are connected together by means of the third reinforcing bars 8, and the connection strength is improved through the bent parts.
In this embodiment, this stake point is earlier in the preparation pedestal 1, connecting plate 2 and steel cap 5 welding together, then shelter from the bottom of pedestal 1 and the outside of connecting plate 2 with the plank, make pedestal 1, connecting plate 2, the inner space that steel cap 5 and second reinforcing bar 7 enclose to close and form seals, then pour the concrete (this concrete adopts C60 and above high label) to it, and at the in-process of pouring the concrete, insert four third reinforcing bars 8 of peripheral equidistance in first through-hole 3, insert the prestressing steel bar in second through-hole 4 again at last, adopt the welded mode to fix prestressing steel bar and connecting plate 2 together. After the concrete below pedestal 1 and connecting plate 2 has done, weld the tubular pile on connecting plate 2 to keep the axis coincidence of tubular pile and stake point, then pour concrete into it (this concrete adopts the same reference numeral with the concrete in pedestal 1), link together pile body and stake point with the help of concrete in the tubular pile and third reinforcing bar 8, and because the upper portion bending of third reinforcing bar 8 makes it become "L" letter shape, can improve the connection effect of pile body and stake point through crooked setting, strengthened holistic stability.
In the piling process, the steel cap 5 at the pile tip can absorb part of impact force through the deformation of the steel cap 5 when meeting a hard stratum, so that the pile body is not damaged.
The above are merely examples of the present invention, and common general knowledge of known specific structures and/or characteristics of the embodiments is not described herein in an excessive amount. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (4)

1. The utility model provides a stake point of hollow square pile of prestressed concrete which characterized in that: the pile foundation structure comprises a pedestal and a pile cap, wherein the pedestal is enclosed by four steel plates to form a rectangular square frame, a connecting plate is arranged at the top of the pedestal, and a through hole for connecting a pile body is formed in the center of the connecting plate; pile cap adopts four first reinforcing bars to enclose to close and forms four pyramids, four the free end setting of first reinforcing bar is in the pedestal, four the cladding has four pyramids's steel cap in the link of first reinforcing bar, the pointed end of steel cap runs through there is the second reinforcing bar, the second reinforcing bar still runs through the one end of pile cap, the regional intussuseption that pedestal, pile cap and steel cap enclose jointly and close is filled with the concrete.
2. The pile tip of the prestressed concrete hollow square pile according to claim 1, wherein: the strength of the concrete adopts C60 and above high-grade.
3. The pile tip of the prestressed concrete hollow square pile according to claim 2, wherein: and a plurality of third steel bars are connected in the concrete.
4. The pile tip of the prestressed concrete hollow square pile according to claim 3, wherein: one end of each third reinforcing steel bar is arranged in a bending mode.
CN201921627559.1U 2019-09-27 2019-09-27 Pile tip of prestressed concrete hollow square pile Active CN210946798U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921627559.1U CN210946798U (en) 2019-09-27 2019-09-27 Pile tip of prestressed concrete hollow square pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921627559.1U CN210946798U (en) 2019-09-27 2019-09-27 Pile tip of prestressed concrete hollow square pile

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CN210946798U true CN210946798U (en) 2020-07-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115142418A (en) * 2022-08-22 2022-10-04 中国建筑第八工程局有限公司 Non-vibration pipe-drawing cage-preventing device for immersed cast-in-place pile and construction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115142418A (en) * 2022-08-22 2022-10-04 中国建筑第八工程局有限公司 Non-vibration pipe-drawing cage-preventing device for immersed cast-in-place pile and construction method thereof
CN115142418B (en) * 2022-08-22 2024-03-12 中国建筑第八工程局有限公司 Non-vibration tube drawing anti-cage device for immersed tube filling pile and construction method thereof

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