CN216194701U

CN216194701U - Concrete square pile end plate and prestressed concrete square pile comprising same

Info

Publication number: CN216194701U
Application number: CN202122418669.0U
Authority: CN
Inventors: 陈巧; 金忠良; 陆立东
Original assignee: Jianhua Construction Materials China Co Ltd; Jiangsu Jianhua New Wall Material Co Ltd
Current assignee: Jianhua Construction Materials China Co Ltd; Jiangsu Jianhua New Wall Material Co Ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-04-05
Anticipated expiration: 2031-10-08

Abstract

The utility model provides a concrete square pile end plate and a prestressed concrete square pile comprising the same, wherein the prestressed concrete square pile comprises a concrete pile body and a square pile end plate; the concrete pile body is internally provided with concrete, prestressed reinforcements and spiral stirrups, the spiral stirrups are wound outside the prestressed reinforcements to form a reinforcement cage, and the prestressed reinforcements and the spiral stirrups are wrapped by the concrete; the end plate main part sets up the one end at the concrete pile body at least, evenly is equipped with the stretch-draw screw hole and the prestressing steel anchor hole of a plurality of intercommunications in the end plate main part, the tip of prestressing steel passes the stretch-draw screw hole, installs at last in prestressing steel anchor hole. The utility model has the characteristics of simple structure, high bearing capacity, low manufacturing cost, high trial production efficiency and the like.

Description

Concrete square pile end plate and prestressed concrete square pile comprising same

Technical Field

The utility model belongs to the technical field of building pile foundation engineering, and particularly relates to a concrete square pile end plate and a prestressed concrete square pile comprising the same.

Background

The method is currently used for raising higher requirements on the performance of building foundations along with the improvement of the importance degree of modern buildings and the continuous increase of the building height. In areas with higher requirements for earthquake fortification, the building foundation not only meets the requirements of vertical compressive load, but also meets the requirements for earthquake fortification. Although the precast concrete piles cast in situ can meet the requirements at the same time through calculation and design, the environment is greatly polluted by the cast in situ, the construction can be continued after one month after the cast in situ is finished for a long construction period, and the construction cost is high, so precast concrete piles, particularly prestressed concrete piles, including prestressed concrete pipe piles and prestressed concrete square piles are adopted as foundation foundations of more engineering projects. The prestressed concrete square piles used at present are mainly of two types: prestressed concrete solid square piles and prestressed concrete hollow square piles. For the prestressed square pile, an end plate is generally arranged on an end plate of a pile body, so that the prestressed reinforcement and the end plate are connected together and then are integrally tensioned, and the prestress of the pile body is realized. The hollow square pile welding end plate in the prior art firstly passes the big through-hole of each strengthening rib connecting through-hole with each strengthening rib end promptly the upset cap of prestressing steel, and the end plate is passed to the level, makes the strengthening rib end fall into in the little through-hole of strengthening rib connecting through-hole, then, locks big through-hole (screw hole) with the bolt, prevents that the strengthening rib from sliding and deviating from. According to the scheme, in actual production, operators need to locally knock off the spiral stirrups at the ends of the reinforcement cages to integrally install the prestressed reinforcements on the end plates, so that the installation efficiency is low, the labor intensity is high, and hidden dangers exist in the quality of the ends of the precast piles.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, an object of the present invention is to provide a concrete square pile end plate and a prestressed concrete square pile including the end plate, which have the advantages of simple structure, high bearing capacity, low cost, simple installation, high manufacturing efficiency, etc.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a concrete square pile end plate, includes the end plate main part, evenly be equipped with multiunit stretch-draw screw hole and prestressed reinforcement anchor hole in the end plate main part, every group includes a stretch-draw screw hole and a prestressed reinforcement anchor hole, and the stretch-draw screw hole and the prestressed reinforcement anchor hole intercommunication of every group have horizontal contained angle between the line in the centre of a circle of the stretch-draw screw hole of mutual intercommunication and the centre of a circle in prestressed reinforcement anchor hole and the outward flange of end plate main part, and this horizontal contained angle is 30 ~ 60, and is a plurality of the centre of a circle in stretch-draw screw hole links into a rectangle, and is a plurality of the centre of a circle in prestressed reinforcement anchor hole links into a rectangle.

In the above scheme, the tensioning screw hole and the prestressed reinforcement anchoring hole are symmetrically arranged along the diagonal line of the end plate main body.

In the scheme, the circle centers of the tension screw holes and the prestressed reinforcement anchoring holes at the corners of the end plate main body are on the same straight line.

In the above scheme, the bight of end plate main part still is provided with the leveling hole, the leveling hole is established in the one side of the rectangle that the centre of a circle that keeps away from the stretch-draw screw hole is even.

Further, the number of the leveling holes is two.

A prestressed concrete square pile comprises a concrete square pile end plate and a concrete pile body; concrete, prestressed reinforcements and spiral stirrups are arranged in the concrete pile body, the spiral stirrups are wound outside the prestressed reinforcements to form reinforcement cages, and the reinforcement cages are wrapped by the concrete; the end plate main body of the concrete square pile end plate is at least arranged at one end of the concrete pile body, and the prestressed reinforcement is arranged in the prestressed reinforcement anchoring hole.

In the scheme, the pile sleeve is further comprised; the pile hoops are at least arranged on the outer surface of concrete at one end of the concrete pile body and connected with the clamping grooves of the end plate main body.

In the scheme, the prestressed reinforcement comprises a reinforcement body and an upsetting cap; at least one end of the steel bar main body is provided with an upsetting cap, the upsetting cap penetrates through the end face of the steel bar main body and is located in a prestressed steel bar anchoring hole of the end plate main body.

Furthermore, a plurality of continuous spiral grooves are uniformly distributed on the outer surfaces of the steel bar main body and the upsetting cap in the circumferential direction, and the spiral angle alpha of each spiral groove is 35-60 degrees.

Furthermore, the top of the heading cap is provided with a boss. The height of the boss is 0.1mm-10 mm.

Further, the upsetting cap is divided into an upper convex part and a lower concave part at the maximum diameter part, the lower concave part is connected with the steel bar main body, and the ratio of the height of the upper convex part to the height of the lower concave part is 1/8-1/2.

In the above scheme, the end plate main body is provided with the clamping table, and the clamping table of the end plate main body is used for butt joint with the clamping table of the connecting clamp.

In the above scheme, the reinforcement cage further comprises a plurality of non-prestressed reinforcements, and the non-prestressed reinforcements and the prestressed main reinforcements are arranged in a staggered manner.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, through angle adjustment of the steel bar anchoring hole and the tensioning screw hole, the spiral stirrup at the end part of the steel bar framework cage does not need to be knocked down when the end plate is installed, so that the field operation strength is greatly reduced, and the manufacturing efficiency of operators is improved. The leveling holes are formed in the angles of the end plates, so that the end plates can be prevented from being stressed eccentrically when being tensioned, the stress of the end plates is more uniform, the deformation of the end plates is avoided, and the flatness of the end plates is ensured. The utility model has the characteristics of simple structure, high bearing capacity, low manufacturing cost, high trial production efficiency and the like.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a first schematic structural view of an end plate body according to an embodiment of the present invention;

FIG. 2 is a second schematic structural view of an end plate body according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a prestressed concrete square pile according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a prestressed reinforcement structure according to an embodiment of the present invention;

FIG. 5 is an enlarged structural view of a spiral groove according to an embodiment of the present invention;

fig. 6 is a first structural diagram of a prestressed reinforcement according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken at A-A in FIG. 6;

FIG. 8 is a cross-sectional view taken at B-B of FIG. 6;

fig. 9 is a second structural diagram of a prestressed reinforcement according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view taken at A-A of FIG. 9;

FIG. 11 is a cross-sectional view taken at B-B of FIG. 9;

fig. 12 is a third structural diagram of a prestressed reinforcement according to an embodiment of the present invention;

FIG. 13 is a cross-sectional view taken at A-A of FIG. 12;

fig. 14 is a cross-sectional view at B-B in fig. 12.

In the figure: 1. a concrete pile body; 2. an end plate main body; 3. concrete; 4. pre-stressing the steel bars; 5. a spiral stirrup; 6. tensioning screw holes; 7. prestressed reinforcement anchoring holes; 8. leveling the hole; 9. a pile hoop; 10. a main body of reinforcing steel bar; 11. upsetting a cap; 12. a spiral groove; 13. a boss; 14. a circumferential groove; 15. an upper convex portion; 16. a lower recess; 17. clamping a platform; 18. a relief pattern; 19. concave lines.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The concrete square pile end plate comprises an end plate main body 2, wherein multiple groups of tensioning screw holes 6 and prestressed reinforcement anchoring holes 7 are uniformly formed in the end plate main body 2, each group comprises one tensioning screw hole 6 and one prestressed reinforcement anchoring hole 7, and the tensioning screw holes 6 and the prestressed reinforcement anchoring holes 7 of each group are communicated. And a plurality of groups of the tensioning screw holes 6 and the prestressed reinforcement anchoring holes 7 are symmetrically arranged along the diagonal line of the end plate main body 2.

As shown in fig. 1 and 2, the circle centers of the tension screw holes 6 and the prestressed reinforcement anchoring holes 7 at the corners of the end plate body 2 are located on the same straight line with the center of the end plate body 2, the horizontal included angle between the straight line and the outer edge of the end plate body 2 is 30-60 °, and the circle centers of the tension screw holes 6 at the other positions of the end plate body 2 and the circle centers of the prestressed reinforcement anchoring holes 7 are located on the same straight line and have a horizontal included angle of 30-60 ° with the outer edge of the end plate body 2, as shown in fig. 1 and 2, preferably, the included angle is represented by B in the drawing and is 45 °. The circle center of the tension screw hole 6 of the end plate main body 2 and the number of the prestressed reinforcement anchoring holes 7 can be set according to specific conditions.

According to this embodiment, preferably, the cross section where the circle centers of the prestressed reinforcements 4 are connected into a whole is rectangular, the cross section where the circle centers of the tensioning screw holes 6 are connected into a whole is also rectangular, and the cross section J is overlapped with the cross section I where the circle centers of the prestressed reinforcements 4 are connected into a whole after being wholly translated.

Preferably, the corner of the end plate main body 2 is provided with a tension leveling hole 8, and the leveling hole 8 is arranged on one side of a rectangle connected with the circle center far away from the tensioning screw hole 6. The quantity of leveling hole 8 is two, and the symmetry sets up in the stretch-draw screw hole 6 and the 7 both sides of prestressing steel anchor hole in end plate main part 2 bight, and the atress is more even. The eccentric stress of the end plate main body 2 during tensioning can be avoided, the stress of the end plate main body is more uniform, the deformation of the end plate main body 2 is avoided, and the flatness of the end plate main body 2 is ensured.

As shown in fig. 3, a prestressed concrete square pile includes a concrete pile body 1 and an end plate main body 2; concrete 3, prestressed reinforcements 4 and spiral stirrups 5 are arranged in the concrete pile body 1, the spiral stirrups 5 are wound outside the prestressed reinforcements 4 to form a reinforcement cage, and the prestressed reinforcements 4 and the spiral stirrups 5 are wrapped by the concrete 3; end plate main part 2 sets up the one end at concrete pile body 1 at least, and the cross-section of end plate main part 2 is hollow form or solid form, evenly is equipped with the stretch-draw screw hole 6 and the prestressing steel anchor hole 7 of a plurality of intercommunications on the end plate main part 2, and stretch-draw screw hole 6 is bigger than prestressing steel anchor hole 7, the tip of prestressing steel 4 passes stretch-draw screw hole 6, installs at last in prestressing steel anchor hole 7.

Preferably, the pile sleeve 9 is also included; the pile hoop 9 is arranged on the outer surface of the concrete pile body 1 and connected with the clamping groove of the end plate main body 2.

As shown in fig. 4, preferably, the prestressed reinforcement 4 includes a reinforcement body 10 and an upset cap 11; at least one end of reinforcing bar main part 10 is equipped with and upsets cap 11, the minimum diameter of upsetting cap 11 is more than or equal to the diameter of reinforcing bar main part 10, upset cap 11 passes reinforcing bar main part 10 terminal surface, and is located the prestressing steel anchor hole 7 of end plate main part 2.

Preferably, a plurality of continuous spiral grooves 12 are uniformly distributed on the outer surfaces of the reinforcing steel bar body 10 and the upsetting cap 11, and the spiral grooves 12 comprise convex patterns 18 and concave patterns 19. Preferably, the spiral groove 12 has a spiral angle α of 35 ° to 60 °, as shown in fig. 5.

As shown in fig. 6 to 14, preferably, the top of the heading cap 11 is provided with a boss 13, a circumferential groove 14 is provided outside the boss 13 along the circumference thereof, and the circumferential groove 14 surrounds the boss 13. Preferably, the boss 13 is cylindrical or truncated cone-shaped. Fig. 6 and 9 show that an end of the reinforcing bar body 10 is provided with an upset cap 11, wherein the boss 13 of fig. 6 is cylindrical, fig. 7 is a cross-sectional view taken along a-a in fig. 6, and fig. 8 is a cross-sectional view taken along B-B in fig. 6. The boss 13 of fig. 9 is in the shape of a truncated cone, fig. 10 is a sectional view taken along a-a in fig. 9, and fig. 11 is a sectional view taken along B-B in fig. 10. Fig. 12 shows that the two ends of the reinforcing steel bar body 10 are both provided with the upsetting caps 11. Fig. 13 is a sectional view taken at a-a in fig. 12, and fig. 14 is a sectional view taken at B-B in fig. 12.

Preferably, the height of the boss 13 is 0.1mm to 10 mm. When the boss 13 makes the reinforcing bar tip receive external load impact, can offset partly impact force earlier, avoid upsetting the cap 11 impaired to influence prestressed reinforcement 4's quality. And meanwhile, when the device is used for the end-plate-free precast pile, the device is combined with the sleeve for use, so that the stress transmission of the upper pile and the lower pile is facilitated after the upper pile is connected.

Preferably, the maximum cross-sectional area is taken as a plane to divide the upsetting cap 11 into an upper convex part 15 and a lower concave part 16 at the maximum diameter, the lower concave part 16 is connected with the steel bar body 10, the ratio of the height of the upper convex part 15 to the height of the lower concave part 16 is 1/8-1/2, so that the stress of the upsetting cap 11 is more reasonable, namely the height of the upper convex part 15 is not too large, otherwise, stress concentration at the upsetting cap 11 is easily caused, and the stress of the upsetting cap 11 is not facilitated.

Further, the outer end face of the end plate main body 2 is provided with a welding face or a clamping table 17, the clamping table 17 of the end plate main body 2 is used for being in butt joint with a clamping table of a connecting clamp, the connecting clamp is used for connecting an upper section prestressed concrete square pile and a lower section prestressed concrete square pile, and preferably, the width of a groove of the connecting clamp is larger than the sum of the thicknesses of the clamping tables of the upper section end plate and the lower section end plate by more than 0.5 mm.

According to this embodiment, preferably, the reinforcement cage further includes a plurality of non-prestressed reinforcements, and the non-prestressed reinforcements and the prestressed main reinforcements 4 are arranged in a staggered manner, so that the horizontal bending-resistant bearing capacity of the prestressed concrete square pile is improved.

In this embodiment, the upsetting cap 11 of the prestressed reinforcement firstly penetrates through the tensioning screw hole 6, and then the upsetting cap 11 of the prestressed reinforcement 4 is inclined by 35-50 degrees and pushed into the prestressed reinforcement anchoring hole 7, so that the spiral stirrups 5 at the end parts of the reinforcement cage do not need to be knocked down when the end plate main body 2 is installed, the field operation strength is greatly reduced, and the manufacturing efficiency of an operator is improved.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a concrete square pile end plate, its characterized in that, including end plate main part (2), evenly be equipped with multiunit stretch-draw screw hole (6) and prestressed reinforcement anchor hole (7) on end plate main part (2), every group includes a stretch-draw screw hole (6) and a prestressed reinforcement anchor hole (7), stretch-draw screw hole (6) and the prestressed reinforcement anchor hole (7) intercommunication of every group, have the horizontal contained angle between the line of the centre of a circle of the stretch-draw screw hole (6) and the centre of a circle of prestressed reinforcement anchor hole (7) that communicate each other and the outward flange of end plate main part (2), this horizontal contained angle is 30 ~ 60, and is a plurality of the centre of a circle of stretch-draw screw hole (6) links into a rectangle, and is a plurality of the centre of a circle of prestressed reinforcement anchor hole (7) links into a rectangle.

2. The concrete square pile end plate according to claim 1, wherein the plurality of sets of the tension screw holes (6) and the prestressed reinforcement anchoring holes (7) are symmetrically arranged along a diagonal line of the end plate body (2).

3. The concrete square pile end plate according to claim 1, wherein the center of the tension screw hole (6) and the center of the prestressed reinforcement anchoring hole (7) at the corner of the end plate body (2) are aligned with the center of the end plate body (2).

4. The concrete square pile end plate according to claim 1, wherein the corners of the end plate body (2) are further provided with leveling holes (8), and the leveling holes (8) are provided at one side of a rectangle connected away from the center of the tension screw hole (6).

5. Concrete square pile end plate according to claim 4, characterized in that the number of levelling holes (8) is two.

6. A prestressed concrete square pile, characterized by comprising a concrete square pile end plate according to any one of claims 1 to 5, and a concrete pile body (1); concrete (3), prestressed reinforcements (4) and spiral stirrups (5) are arranged in the concrete pile body (1), the spiral stirrups (5) are wound outside the prestressed reinforcements (4) to form a reinforcement cage, and the concrete (3) wraps the reinforcement cage; the end plate main body (2) of the concrete square pile end plate is at least arranged at one end of the concrete pile body (1), and the prestressed reinforcement (4) is installed in the prestressed reinforcement anchoring hole (7).

7. The prestressed concrete square pile of claim 6, further comprising a pile cuff (9); the pile hoop (9) is at least arranged on the outer concrete surface of one end of the concrete pile body (1) and connected with the clamping groove of the end plate main body (2).

8. Prestressed concrete square pile according to claim 6, characterized in that said prestressed reinforcement (4) comprises a reinforcement body (10) and an upsetting cap (11); at least one end of the steel bar body (10) is provided with an upsetting cap (11), the upsetting cap (11) penetrates through the end face of the steel bar body (10) and is located in a prestressed steel bar anchoring hole (7) of the end plate body (2).

9. The prestressed concrete square pile according to claim 8, wherein a plurality of continuous spiral grooves (12) are uniformly distributed on the outer surfaces of the steel bar body (10) and the upsetting cap (11) in the circumferential direction, and the spiral angle alpha of each spiral groove (12) is 35-60 degrees.

10. The prestressed concrete square pile according to claim 8, wherein a boss (13) is provided on the top of the heading cap (11), and the height of the boss (13) is 0.1mm-10 mm.

11. The prestressed concrete square pile according to claim 8, wherein the upset cap (11) is divided into an upper convex portion (15) and a lower concave portion (16) at the maximum diameter, the lower concave portion (16) is connected with the steel bar body (10), and the ratio of the height of the upper convex portion (15) to the height of the lower concave portion (16) is 1/8-1/2.

12. Prestressed concrete square pile according to claim 6, characterized in that the end plate body (2) is provided with a catch (17), the catch (17) of the end plate body (2) being intended to be in abutment with a catch of a connecting catch.

13. The prestressed concrete square pile of claim 6, wherein said reinforcement cage further comprises a plurality of non-prestressed reinforcements, said non-prestressed reinforcements and prestressed main reinforcements being arranged in a staggered manner.