CN202380461U

CN202380461U - Anti-seismic prestressed high strength concrete (PHC) pipe pile

Info

Publication number: CN202380461U
Application number: CN2011204892828U
Authority: CN
Inventors: 王吉双; 吴平平; 段海澎; 陈修和; 席进; 郑建中; 袁瑞; 王诗青
Original assignee: Anhui Transport Consulting and Design Institute Co Ltd
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-08-15
Anticipated expiration: 2021-12-01

Abstract

The utility model relates to an anti-seismic prestressed high strength concrete (PHC) pipe pile, which comprises pipe body concrete, longitudinal prestressed steel bars, longitudinal ordinary steel bars, spiral stirrups, pile casing hoops and end plates. The anti-seismic PHC pipe pile adopts a hollow circular tube-shaped structure; the longitudinal prestressed steel bars and the longitudinal ordinary steel bars are annularly and evenly distributed in the pipe body concrete at certain distances from the outer edge and the inner edge of the pipe body concrete respectively; the spiral stirrups are integrally and spirally distributed in the longitudinal direction of a pile body round the longitudinal prestressed steel bars and the longitudinal ordinary steel bars; the pile casing hoops and the end plates are arranged at the ends of the pile; the spiral stirrups are densely distributed relative to the middle part of the pile within distances three times of the diameter of pile from the two ends of the pile; two inner convex ribs are arranged on the circumferential inner surfaces of the pile casing hoops; and after being welded with the end plates, the pile casing hoops are arranged at the end parts of the pile. Through the adoption of the anti-seismic PHC pipe pile, the horizontal anti-shear performance and the vertical anti-pulling performance of an ordinary PHC pipe pile are improved, so as to provide a new type for the selection of bridge foundations of high intensity seismic regions.

Description

A kind of antidetonation type prestressed high-strength concrete pile

Technical field

The utility model relates to prestress high intensity concrete (PHC) pile tube.Be a kind of antidetonation type PHC pile tube specifically.

Background technology

The PHC pile tube is as a kind of novel foundation pile, because its excellent performance has obtained the building personage's of circle favor, development is rapid abroad, and Japan, Hong Kong and Macao and Southeast Asian countries are used all very extensive.Domesticly begin development and production PHC pile tube in the eighties; Have the nearly various schools of thinkers of factory till now; One annual production surpasses 10,000,000 meters, is applied in industry and civilian construction, bridge, port and pier, hydraulic engineering etc., in nation-building, has brought into play more and more big effect.The major advantage of PHC pile tube has: 1, pile strength is high, has stronger service behaviour, and pile body can remain intact under tight bad construction environment, significantly reduces the generation of splitting stake, fracture accident.2, the PHC stake is by specialized factory's automated production in enormous quantities, and pile quality is reliable and stable.3, penetration power is strong, under the enough pressure, can pass through thicker chiltern soil layer, guarantees that stake end build-in is in bearing stratum preferably.When 4, static pressure was constructed, the job site was succinct, and pollution-free, noiselessness can ensure civilized construction.5, because the bearing capacity of single pile of PHC stake is higher relatively, amount of concrete that its ring section is consumed is less, thereby unit bearing capacity cost is economized most.Prestressed concrete pipe pile is under horizontal earthquake action; Except bearing axial compression; Also may receive the effect of horizontal shear and vertical uplift force; Because horizontal shearing resistance of common prestressed concrete pipe pile and vertically pulling-resistant ability are relatively poor, so generally can not be applied in the earthquake highly seismic region pile foundation.

Summary of the invention

In order to solve the relatively poor shortcoming of common prestressed concrete pipe pile anti-seismic performance, the utility model provides a kind of antidetonation type PHC pile tube, is applicable to earthquake highly seismic region bridge foundation.

The technical scheme that the utility model adopted is:

A kind of antidetonation type prestressed high-strength concrete pile comprises pile concrete 1, prestressed reinforcement 2, spiral stirrup, stake end cover; Improvement is: vertical annular spread two-layer steel bar layer in the said tubular pile concrete tube wall, and skin is the prestressed reinforcement layer, and internal layer is the plain bars layer; Be wrapped in outer spiral stirrup 4.1 and internal layer spiral stirrup 4.2 on said prestressed reinforcement layer and the plain bars layer respectively, both one-piece auger shapes are arranged;

The two ends of said pile tube also are equipped with the thin-wall steel tube that pile protection hoop 5 equates with the pile tube external diameter for diameter, and end plate 6 is the circular hollow steel plate identical with the pile tube cross section, and end plate 6 is welded on the stake end that is installed in pile tube behind pile protection hoop 5 one sides.

Said outer spiral stirrup 4.1 and internal layer spiral stirrup 4.2 all arrange in I between the distance regions of three times of stakes footpaths of stake end, encrypting, and its pitch is outside the II interval, pile tube middle part, the 1/2-1/3 of internal layer spiral stirrup pitch.

The hoop of said pile protection hoop 5 is provided with twice inner convex rib 7 on one's body.

The useful technique effect of the utility model is:

1, the utility model antidetonation type PHC pile tube; Compare common PHC pile tube and increase by a circle pile protection hoop to plain bars and spiral stirrup; And spiral stirrup is encrypted in three times of stakes of two end distance stake end faces are directly between distance regions and is arranged, promotes the horizontal shearing resistance and the vertically pulling-resistant performance of PHC pile tube;

2, the utility model antidetonation type PHC pile tube, the hoop of pile protection hoop is provided with the twice inner convex rib on one's body, strengthens the switching performance of cuff and pile body;

3, the utility model antidetonation type PHC pile tube simple structure, general pile tube manufacturer can both produce, for earthquake highly seismic region bridge foundation selects to provide a kind of new pattern.

Description of drawings

Fig. 1 is the standard cross-section sketch map of the utility model.

Fig. 2 vertically partly cuts open sketch map for the utility model.

Fig. 3 is the end view of pile tube.

Among the figure: pile concrete 1, prestressed reinforcement 2, plain bars 3, outer spiral stirrup 4.1, internal layer spiral stirrup 4.2, pile protection hoop 5, end plate 6, inner convex rib 7.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is done explanation further through embodiment.

Embodiment:

Referring to Fig. 1-Fig. 3, a kind of antidetonation type prestressed high-strength concrete pile comprises pile concrete 1, prestressed reinforcement 2, spiral stirrup, pile protection hoop 5 and end plate 6; Vertical annular spread two-layer steel bar layer in the concrete tube wall of antidetonation type PHC pile tube, and outer is that the prestressed reinforcement layer uses prestressed reinforcement 2, and internal layer is that the plain bars layer uses plain bars 3; Be wrapped in outer spiral stirrup 4.1 and internal layer spiral stirrup 4.2 on prestressed reinforcement layer and the plain bars layer respectively; Outer spiral stirrup 4.1 and internal layer spiral stirrup 4.2, both one-piece auger shapes arrange all in I between the distance regions of three times of stakes footpaths of stake end, encrypting and arrange, its pitch is outside the II interval, pile tube middle part, internal layer spiral stirrup pitch 1/3.

Pile protection hoop 5 is the thin-wall steel tube that diameter equates with antidetonation type PHC pile tube external diameter, and the hoop of pile protection hoop 5 is provided with twice inner convex rib 7 on one's body.End plate 6 is and the identical circular hollow steel plate in antidetonation type PHC pile tube cross section, and end plate 6 is welded on the stake end that is installed in antidetonation type PHC pile tube behind pile protection hoop 5 one sides.

Claims

1. an antidetonation type prestressed high-strength concrete pile comprises pile concrete (1), prestressed reinforcement (2), spiral stirrup, stake end cover; It is characterized in that: vertical annular spread two-layer steel bar layer in the said tubular pile concrete tube wall, and skin is the prestressed reinforcement layer, and internal layer is the plain bars layer; Be wrapped in outer spiral stirrup (4.1) and internal layer spiral stirrup (4.2) on said prestressed reinforcement layer and the plain bars layer respectively, both one-piece auger shapes are arranged;

The two ends of said pile tube also are equipped with pile protection hoop (5) and end plate (6); Pile protection hoop (5) is the thin-wall steel tube that diameter equates with the pile tube external diameter, and end plate (6) is the circular hollow steel plate identical with the pile tube cross section, and end plate (6) is welded on pile protection hoop (5) one sides, and is installed in the stake end of pile tube.

2. a kind of antidetonation type prestressed high-strength concrete pile according to claim 1; It is characterized in that: said outer spiral stirrup (4.1) and internal layer spiral stirrup (4.2) all arrange in I between the distance regions of three times of stakes footpaths of stake end, encrypting, and its pitch is outside the II interval, pile tube middle part, the 1/2-1/3 of internal layer spiral stirrup pitch.

3. a kind of antidetonation type prestressed high-strength concrete pile according to claim 1, it is characterized in that: the hoop of said pile protection hoop (5) is provided with twice inner convex rib (7) on one's body.