CN202672144U

CN202672144U - Bamboo joint type pre-stressed concrete centrifugal square pile

Info

Publication number: CN202672144U
Application number: CN 201220288858
Authority: CN
Inventors: 黄培明; 崔凤岭; 李惠立; 鲍立新; 苏永刚; 刘洁
Original assignee: TIANJIN JIANCHENG JIYE GROUP CO Ltd
Current assignee: TIANJIN JIANCHENG JIYE GROUP CO Ltd
Priority date: 2012-06-19
Filing date: 2012-06-19
Publication date: 2013-01-16
Anticipated expiration: 2022-06-19

Abstract

The utility model provides a bamboo joint type pre-stressed concrete centrifugal square pile. The pile comprises a concrete pile body, wherein a longitudinal cylindrical through hole is formed in the pile body; a reinforcement cage is arranged in the pile body; an end plate which is square in the exterior and round in the interior is arranged at each end of the pile body; the pile body is divided into multiple sections; the multiple sections of the cross sections of the pile body are alternately arranged in the shape of quadrilateral square and octagon; and the cross sections of the two end sections of the pile body are quadrilateral square. The pile has the effects that the vertical compressive strength of the pile body can be fully used by using the piles with the same cross section and length in the same area, and the compressive resistance and the pull resistance of the pile are improved. The bamboo joint type pre-stressed concrete centrifugal square pile is applied to a project with soft geologic structure and high requirement on pull resistance. By the pile, the bearing capacity is improved by about 20 percent, the pull resistance is improved by about 15 percent, the side resistance force or the pull resistance of the pile is increased, and the interaction effect between the pile and soil is improved.

Description

The bamboo joint type prestress concrete offcenter squared pile

Technical field

The utility model relates to a kind of prefabricated Novel pile type that uses in the building field Foundation Design.Both a kind of bamboo joint type prestress concrete offcenter squared piles.

Background technology

Prestressing concrete hollow pile commonly used generally is divided into two kinds in the pile foundation construction at present, and a kind of is round stake (pile tube), and another kind is full square stake (square pile).Pile vertical carrying capacity divides pile side resistance and end resistance.The collateral resistance stake, stake top vertical load is born by pile side resistance, and pile side resistance is given birth to frictional resistance by pile body face and stake side local products usually.If increase a stake top vertical bearing capacity, just must increase stake long or increase the sectional area of pile body.

If can change the shape of pile body, stake top vertical load bears 1. side skin frictions, the 2. shearing force of soil by pile side resistance by two power.Stake is long or increase the sectional area of pile body not increasing, and just can increase a top vertical load.

Summary of the invention

For structural deficiency in the prior art, the utility model provides a kind of bamboo joint type prestress concrete offcenter squared pile, by the variation of pile body shape, in the situation that do not increase the long and dowel section area of stake, by the variation of pile body shape, improve the effect of pile vertical carrying capacity and resistance to plucking ability.

For achieving the above object, the technical solution adopted in the utility model provides a kind of bamboo joint type prestress concrete offcenter squared pile, include the concrete pile body, be vertical cylindrical hole in the middle of in the pile body, a reinforcing cage is arranged in the pile body, and respectively there is the end plate of a square-outside and round-inside at the pile body two ends, and wherein: described pile body is divided into multistage, the cross sectional shape of pile body multistage is that four jiaos of squares and octagon are arranged alternately, and it is four jiaos of squares that the two ends section of described pile body is cross sectional shape.

Effect of the present utility model is long with the identical stake of same cross-sectional in identical region, can give full play to pile body vertical compression intensity, improves resistance to compression, the resistance to plucking resistance of stake.Bamboo joint type prestress concrete offcenter squared pile of the present utility model is applicable to the engineering that geology is weak and resistance to plucking is had relatively high expectations.Adopt this pile capacity to improve about 20 ﹪, uplift resistance improves about 15 ﹪, increases pile side friction or uplift resistance, improves the interaction of stake and soil.

Description of drawings

Fig. 1 is the utility model pile body partial structurtes sectional views;

Fig. 2 is the utility model end plate plan view;

Fig. 3 is the utility model end plate lateral view;

Fig. 4 is Fig. 3 B section enlarged drawing;

Fig. 5 is Fig. 2 A section enlarged drawing;

Fig. 6 is Fig. 2 partial sectional view;

Fig. 7 is the A-A sectional view of Fig. 1;

Fig. 8 is the B-B sectional view of Fig. 1;

Fig. 9 is the utility model quadrangle body reinforcing bar sectional view;

Figure 10 is the utility model octagon body reinforcing bar sectional view;

Figure 11 is the utility model quadrangle body elevation;

Figure 12 is the utility model octagon body Fig. 8 A angle elevation;

Figure 13 is the utility model reinforcement cage structure schematic diagram;

Figure 14 is the connection diagram of the utility model end plate and main muscle and heading.

Among the figure:

1, main muscle 2, circular stirrups 3, square stirrup 4, auxiliary muscle 5, end plate 6, quadrangle body 7, octagon body 8, stretch-draw hole 9, through wires hole 10, heading

The specific embodiment

Reaching by reference to the accompanying drawings embodiment is illustrated bamboo joint type prestress concrete offcenter squared pile of the present utility model.

Bamboo joint type prestress concrete offcenter squared pile design philosophy of the present utility model is for enlarging the scope of application of offcenter squared pile, the profile of design pile body is comprised of tetragonal body and all directions body, and the combining form in cross section is followed successively by quadrangle-octagon-quadrangle-octagon ... quadrangle.A reinforcing cage is arranged in the pile body, and respectively there is the metal end plate of a square-outside and round-inside at reinforcing cage master muscle two ends, and the inside and outside of reinforcing cage is concrete, and middle in the pile body is vertical cylindrical hole, and the two ends end plate is connected and fixed by heading and the reinforcing cage of reinforcing cage master muscle.

As shown in Figure 1, bamboo joint type prestress concrete offcenter squared pile structure of the present utility model is, include the concrete pile body, be vertical cylindrical hole in the middle of in the pile body, a reinforcing cage is arranged in the pile body, and respectively there is the end plate 5 of a square-outside and round-inside at the pile body two ends, and described pile body is divided into multistage, the cross sectional shape of pile body multistage is that four jiaos of squares and octagon are arranged alternately, and it is four jiaos of squares that the two ends section of described pile body is cross sectional shape.The length of octagon body 7 pile bodies of the quadrangle body 6 of described every section four jiaos of squares or octagon is 2-4 rice.

Four limit chamferings of described two ends end plate are 30 °, and chamfering is from base 2mm, and depth of chamfering H is 10～15mm.Described two ends end plate is connected and fixed by heading and the reinforcing cage of reinforcing cage master muscle.

Bamboo joint type prestress concrete offcenter squared pile of the present utility model, described reinforcing cage is comprised of main muscle 1, round spiral stirrup 2, auxiliary muscle 4, square spiral shape stirrup 3.＜=450 * 450 bamboo joint type square pile is by main muscle 1, round spiral stirrup 2.＞=500 * 500 bamboo joint type square pile is comprised of main muscle 1, round spiral stirrup 2, auxiliary muscle 4, square spiral shape stirrup 3.This square pile comprises two kinds of cross sections, and a kind of is the another kind of pile bodies that are comprised of two kinds of cross sections for the octagon cross section in four jiaos of square cross sections.Respectively there is the metal end plate 5 of a square-outside and round-inside at the pile body two ends, and a reinforcing cage is arranged in the pile body, and the inside and outside of reinforcing cage is concrete, and middle in the pile body is vertical cylindrical hole, and the two ends end plate is connected and fixed by heading and the reinforcing cage of reinforcing cage master muscle.

Shown in Fig. 2,3,4,5,6, respectively there is the end plate 5 of a square-outside and round-inside at the utility model pile body two ends, and end plate four limit chamferings are 30 °, and chamfering is from base 2mm, depth of chamfering H=10～15mm.Fig. 5 processing is pressed at end plate 5 middle parts, and the stretch-draw hole 8 of end plate is put at main muscle 1 two ends, then moves to respectively through wires hole 9 and carries out prestressed stretch-draw.After complete through stretch-draw, in mould, inject the concrete centrifugal moulding, formed the bamboo joint type prestress concrete offcenter squared pile through after steam-cured.

Fig. 7 is that quadrangle body sectional view, Fig. 8 are this octagon body sectional view, and the length of two kinds of outline bodies is decided by designing requirement.

Fig. 9 is that quadrangle body reinforcing bar sectional view, Figure 10 are that octagon body reinforcing bar sectional view, Figure 11 are that quadrangle body elevation, Figure 12 are that octagon body Fig. 8 A angle elevation, Figure 13 are the reinforcement cage structure schematic diagram, described reinforcing cage by main muscle 1, round spiral stirrup 2, auxiliary muscle 4, square spiral shape stirrup 3 form, the reinforcing cage two ends are fixed with end plate 5.

Be connected and fixed with reinforcing cage such as the heading 10 of Figure 14 two ends end plate 5 by reinforcing cage master muscle 1.

Claims

1. bamboo joint type prestress concrete offcenter squared pile, include the concrete pile body, be vertical cylindrical hole in the middle of in the pile body, a reinforcing cage is arranged in the pile body, respectively there is the end plate of a square-outside and round-inside at the pile body two ends, it is characterized in that: described pile body is divided into multistage, and the cross sectional shape of pile body multistage is that four jiaos of squares and octagon are arranged alternately, and it is four jiaos of squares that the two ends section of described pile body is cross sectional shape.

2. described bamboo joint type prestress concrete offcenter squared pile according to claim 1, it is characterized in that: the length of the pile body of described four jiaos of squares or octagon is 2-4 rice.

3. described bamboo joint type prestress concrete offcenter squared pile according to claim 1, it is characterized in that: four limit chamferings of described two ends end plate are 30 °, and chamfering is from base 2mm, and depth of chamfering H is 10～15mm.

4. described bamboo joint type prestress concrete offcenter squared pile according to claim 1, it is characterized in that: described two ends end plate is connected and fixed by heading and the reinforcing cage of reinforcing cage master muscle.