CN215105281U

CN215105281U - Anchor-tension separated enhanced pile end anchoring plate and precast pile comprising same

Info

Publication number: CN215105281U
Application number: CN202120744083.0U
Authority: CN
Inventors: 金忠良; 陈巧; 赵鹏
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: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-12-10
Anticipated expiration: 2031-04-12

Abstract

The utility model relates to an anchor-tension separated enhanced pile end anchoring plate, which comprises a tension screw hole and a reinforcing steel bar anchoring hole, wherein the tension screw hole and the reinforcing steel bar anchoring hole are separated from each other, the reinforcing steel bar anchoring hole penetrates through the pile end anchoring plate, and the inner wall of the tension screw hole is provided with tension threads; the included angle alpha between the center of the tensioning screw hole and the center of the reinforcing steel bar anchoring hole and the central connecting line or the side line of the pile end anchoring plate is 6-45 degrees, the reinforcing steel bar anchoring hole is conical, and the cone angle beta of the reinforcing steel bar anchoring hole is 20-180 degrees. The application also provides an enhanced precast pile. The utility model provides a pile tip anchor plate has increased the intensity of pile tip anchor plate, has promoted the area of contact of reinforcing bar upset head with the end plate, promotes the anchorage performance of reinforcing bar and end plate, has reduced the stress concentration phenomenon that the reinforcing bar produced at stretch-draw in-process end plate, has promoted the tensile properties of end plate. The precast pile has the characteristics of simple structure, high resistance to pulling and horizontal bearing capacity, excellent performance of the steel bar anchoring plates at two ends of the pile, low manufacturing cost, high construction efficiency and the like.

Description

Anchor-tension separated enhanced pile end anchoring plate and precast pile comprising same

Technical Field

The utility model relates to a building engineering technical field especially relates to an anchor is opened enhancement mode pile tip anchor board of separation and is contained its precast pile.

Background

With the improvement of the importance degree of modern buildings and the continuous increase of the building height, higher requirements are put forward on the bearing capacity of the foundation, the natural foundation cannot better bear the load transmitted by the upper buildings, concrete piles are used as foundation piles of the foundation, and the piles are pressed into the ground by a pile pressing machine to form foundation piles, so that the upper parts of the foundation piles bear the buildings.

In the technical scheme of chinese patent CN202023189U, the name "a hollow square pile of basic concrete", the both ends of pile are equipped with the metal end plate that is connected with the steel reinforcement cage, are equipped with through wires hole and tension hole on the metal end plate, and the through wires hole is the counter sink, and the reinforcing bar is connected with the counter sink, and the tension hole links to each other with the through wires hole through the muscle groove separately. The end plate is provided with the rib grooves, so that the installation of the steel bars and the end plate is convenient, but the tensile bearing capacity of the end plate is reduced due to the rib grooves, so that hidden dangers exist in the stress of the steel bars and the counter sink holes, and particularly in the uplift engineering and the horizontal engineering, the tensile and horizontal bearing capacity of the pile body need to be reduced by considering the influence of the structure of the end plate on the performance of the pile body. In addition, the end plates need to be additionally provided with the rib grooves, so that the processing cost of the end plates is increased, and the production cost of the precast pile is increased.

In the chinese patent CN103290839B and the title "connecting structure of end plate and steel bar of prestressed concrete tubular pile", the end plate is provided with bolt holes, clamping arc grooves and scoring grooves, and the steel bar passes through the bolt holes and scoring grooves in the end plate and mounts the steel bar on the tapered hole, thereby realizing the connection between the steel bar and the end plate, the disadvantage of this connection scheme is the same as that of CN202023189U, and there is a step-shaped tapered hole because the end plate is provided, in order to meet the requirements of tensile and shear resistance of the end plate, the material of the end plate needs to be improved or the thickness of the end plate needs to be increased to meet the anchoring requirements of the steel bar and the end plate, thereby avoiding the quality problems that the end plate is pulled through in the tensile process of the steel bar, thereby greatly affecting the quality of the pile, once the end plate at the end is pulled through in the tensile process of the precast pile, the engineering has a significant problem.

SUMMERY OF THE UTILITY MODEL

For the anchor performance and the quality problem of solving current stake and end plate, the utility model provides an anchor is opened enhancement mode stake end anchor board of separation and is contained its precast pile.

The specific contents of the utility model are as follows: an anchor-tension separated enhanced pile end anchoring plate comprises a tension screw hole and a steel bar anchoring hole, wherein the tension screw hole and the steel bar anchoring hole are separated from each other, the steel bar anchoring hole penetrates through the pile end anchoring plate, and tension threads are arranged on the inner wall of the tension screw hole; the included angle alpha between the center of the tensioning screw hole and the center of the reinforcing steel bar anchoring hole and the central connecting line or the side line of the pile end anchoring plate is 6-45 degrees, the reinforcing steel bar anchoring hole is conical, and the cone angle beta of the reinforcing steel bar anchoring hole is 20-180 degrees.

Furthermore, an oblique angle is arranged at one end, close to the inner side of the pile end anchoring plate, of the steel bar anchoring hole.

Furthermore, the number ratio of the tension screw holes to the reinforcing steel bar anchoring holes is 0.4-5.

Furthermore, when the number ratio of the tensioning screw holes to the steel bar anchoring holes is larger than 1, the tensioning screw holes and the steel bar anchoring holes are distributed in groups, and the tensioning screw holes in each group are uniformly distributed around the steel bar anchoring holes.

Furthermore, the cross section of the pile end anchoring plate comprises an outer circle and an inner circle hollow shape, an outer circle and an inner circle hollow shape or a polygonal solid shape.

Furthermore, the centers of the tensioning screw holes and the reinforcing steel bar anchoring holes are distributed on the pile end anchoring plate according to the circumferences with the same or different radiuses, or are distributed according to the same rectangle or different rectangles, or are distributed on the same straight line according to the tensioning screw holes and the reinforcing steel bar anchoring holes in each group.

Furthermore, the pile end anchoring plate is provided with clamping teeth.

Furthermore, the number of the latch teeth is more than 4, the latch teeth are trapezoidal, and the included angle delta of the upper end of the trapezoid is 90-140 degrees.

Furthermore, the ratio of the diameter of the large opening to the diameter of the small opening of the steel bar anchoring hole is (1.5-2.2) to 1.

Furthermore, a sunken step is arranged at the edge of one side of the pile end anchoring plate.

Furthermore, the cross section of one side of the pile-end anchoring plate, which is contacted with the concrete, is larger than the area of the cross section of the other side of the pile-end anchoring plate, so that the end part of the pile-end anchoring plate, which is close to the concrete, forms a clamping table.

The utility model also provides a reinforced precast pile, which comprises any one of the reinforced pile-end anchoring plates with separated anchors, a pile body and a reinforcement cage, wherein the pile-end anchoring plates are respectively arranged at the two ends of the pile body,

the steel reinforcement cage comprises prestressed steel bars and spiral stirrups arranged on the outer sides of the prestressed steel bars, the number of the prestressed steel bars is consistent with the number of the steel reinforcement anchoring holes or less than the number of the steel reinforcement anchoring holes, upset heads are arranged at two ends of each prestressed steel bar, and the upset heads are arranged in the steel reinforcement anchoring holes;

the pile body comprises concrete and pile hoops, the concrete wraps the reinforcement cage, and the pile hoops are arranged at two ends of the pile body.

Further, the diameters of the maximum end and the minimum end of the upset head are respectively smaller than the diameter of a large opening and the diameter of a small opening of the steel bar anchoring hole; the thickness H of the pile end anchoring plate is larger than the height H of the steel bar heading.

Furthermore, one end of the pile sleeve hoop extending out of the concrete is matched with the step on one side edge of the pile-end anchoring plate.

Furthermore, a metal indentation is arranged on one side of the pile hoop, which is in contact with concrete.

Furthermore, the upset head of the prestressed reinforcement is a conical upset head, and the cone angle theta of the upset head is 20-180 degrees.

Furthermore, the outer surface of the prestressed reinforcement is provided with concave or convex threads.

Furthermore, a sealing device is arranged on the outer side of the heading of the prestressed reinforcement.

Further, the sealing means comprises a non-metallic material, the sealing means being able to withstand a temperature of at least 60 °.

The pile end anchoring plate of the utility model abandons the middle groove or the rib groove in the prior art, increases the strength of the pile end anchoring plate, and promotes the contact area between the steel bar heading and the end plate through the conical steel bar anchoring hole, thereby effectively promoting the anchoring performance between the steel bar and the end plate; the included angle alpha of the tension screw hole and the steel bar anchoring hole is 6-45 degrees, the stress concentration phenomenon of the steel bar in the tension process generated by the end plate is effectively reduced, the deformation of the end plate is effectively avoided, and the tensile property of the end plate is improved. The utility model discloses a precast pile realizes the mechanical connection of reinforcing bar and anchor board through reinforcing bar anchor board, reinforcing bar isotructure, has characteristics such as simple structure, resistance to plucking and the reinforcing bar anchor board performance of level bearing capacity height, stake both ends is excellent, the cost is low, the efficiency of construction is high.

Drawings

The following further explains the embodiments of the present invention with reference to the drawings.

Fig. 1 is a cross-sectional view of a pile-end anchor plate of example 1;

fig. 2 is a front view of the pile-end anchor plate of example 1;

fig. 3 is a cross-sectional view of the pile-end anchor plate of example 2;

fig. 4 is a front view of the pile-end anchor plate of example 3;

fig. 5 is a front view of the pile-end anchor plate of example 4;

fig. 6 is a front view of the pile-end anchor plate of example 5;

fig. 7 is a front view of the pile-end anchor plate of example 6;

fig. 8 is a front view of the pile-end anchor plate of example 7;

fig. 9 is a front view of the pile-end anchor plate of example 8;

fig. 10 is a front view of the pile-end anchor plate of example 9;

fig. 11 is a front view of the pile-end anchor plate of example 10;

fig. 12 is a schematic view of a precast pile of embodiment 11;

fig. 13 is a schematic view of the pile end anchor plate of example 11 assembled with prestressed reinforcement;

FIG. 14 is a schematic illustration of metal indentation of example 11;

fig. 15 is a schematic view of a prestressed reinforcement according to example 11;

fig. 16 is a schematic view of a prestressed reinforcement according to example 12;

fig. 17 is a schematic view of a prestressed reinforcement according to example 13.

Detailed Description

In the description of the present embodiment, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal, top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present embodiment and simplifying the description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the interior and exterior of the profile relative to the components themselves; "center, edge line" and the like refer to the center and edge line positions in the elevation or cross-sectional view of the respective components.

Example 1

As shown in fig. 1 and 2, this embodiment discloses an anchor-tensioning separated enhancement type pile-end anchoring plate, pile-end anchoring plate 1 is wholly excircle inner circle (i.e. the front view is wholly circular), including tensioning screw hole 11 and reinforcing steel bar anchoring hole 12, tensioning screw hole 11 and reinforcing steel bar anchoring hole 12 separate each other, and reinforcing steel bar anchoring hole 12 runs through pile-

end anchoring plate

1, and 11 inner walls of tensioning screw hole are equipped with the tensioning screw thread. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of a large opening to a small opening (namely the upper opening and the lower opening in the figure 1) is 1.5: 1. In this embodiment, the whole pile-end anchoring plate 1 may also be polygonal solid. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 1.5: 1, the taper angle beta range is suitable for the shape and the angle of a matched reinforcing steel bar upset head, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar upset head can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar upset head moves to a bar body of the reinforcing steel bar, and therefore the upset head is prevented from being damaged.

In this embodiment, the tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 correspond to each other one by one (i.e., the number ratio of the tensioning screw holes 11 to the reinforcing steel bar anchoring holes 12 is 1: 1), and there are 12 groups in total, and the groups are uniformly distributed on the pile end anchoring plate 1. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 2: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates.

The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the connecting line of the centers (namely the circle centers) of the pile end anchoring plates 1 respectively, and the range of the alpha is 6-45 degrees. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Preferably, the centers of the 12 sets of tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are located on a circumference which takes the center of the pile-end anchoring plate 1 as an origin and the distance from the center of the pile-end anchoring plate 1 to the center of the tensioning screw hole 11 (or the reinforcing steel bar anchoring hole 12) as a radius. Correspondingly, the number of the main reinforcements of the reinforcement cage to be assembled is 12, the main reinforcements are uniformly distributed in a circular shape, and the corresponding tensioning bolt mounting holes in the head and tail plates to be assembled are also distributed in a circular shape.

In this embodiment, a recessed step is provided at one side edge of the pile-end anchoring plate 1, and the step is formed by a cross section of the inner side of the end plate smaller than that of the other side toward the inner side of the end plate, i.e., the side in contact with the concrete. The step is convenient for the pile end anchoring plate 1 to be mutually matched with the pile hoops at the two ends of the precast pile when the precast pile is assembled, so that the end part of the pile hoop extends into the step.

According to the reinforced pile-end anchoring plate 1 with separated anchors and tension, the groove or the rib groove in the prior art is eliminated, so that the processing cost of the pile-end anchoring plate 1 is reduced, and the rigidity of the pile-end anchoring plate 1 is improved; the conical steel bar anchoring hole 12 is adapted to the steel bar heading, so that the contact area of the steel bar heading and the pile-end anchoring plate 1 is increased, and the anchoring performance of the steel bar and the pile-end anchoring plate 1 is effectively improved; the included angle alpha between the tensioning screw hole 11 and the reinforcing steel bar anchoring hole 12 is 6-45 degrees, so that the stress concentration phenomenon of the pile end anchoring plate 1 in the tensioning process of the reinforcing steel bar is effectively reduced. The deformation of the pile-end anchoring plate 1 is avoided, and the tensile property of the pile-end anchoring plate 1 is improved; therefore, the steel pipe has the characteristics of simple structure, high pulling resistance and horizontal bearing capacity, low manufacturing cost, high construction efficiency and the like, and has good application prospect.

Example 2

As shown in fig. 3, the present embodiment discloses a reinforced pile-end anchoring plate with split anchoring, wherein the end (i.e. small-mouth end) of the reinforcing steel bar anchoring hole 12 near the inner side of the pile-end anchoring plate is provided with a bevel 14; the cross section of one side of the pile-end anchoring plate, which is contacted with the concrete, is larger than the area of the cross section of the other side of the pile-end anchoring plate, so that the end part of the pile-end anchoring plate, which is close to the concrete, forms a clamping table 15. The remaining technical features are the same as those of embodiment 1, and are not described herein again.

The bevel angle in this embodiment refers to the bevel 14 in cross-section, which in actual construction is presented by a trumpet-shaped channel with a small top and a large bottom. The bevel angle 14 is arranged at a small opening of the steel bar anchoring hole 12, so that the guide effect can be achieved when a steel bar is inserted, and the steel bar is conveniently inserted. The clamping platform 15 of the present embodiment is in a shape of a step shape with a high step near the inner side of the pile-end anchoring plate and a low step near the outer side of the pile-end anchoring plate. The pile sleeve hoop corresponding to the clamping table 15 is provided with a bending part at the end part, and is in an L shape. When precast pile production is carried out like this, can adorn pile end anchor board earlier, equipment pile hoop again, only need with the department of buckling of pile hoop tip impress in the ka tai can, through the setting of this structure, can conveniently assemble the end plate with pile hoop on to improve the stability that both connect.

Example 3

As shown in fig. 4, this embodiment discloses an anchor-tensioning separated enhancement mode pile end anchor plate, and pile end anchor plate 1 is wholly circular in the excircle, including stretch-draw screw hole 11 and reinforcing bar anchor hole 12, stretch-draw screw hole 11 and reinforcing bar anchor hole 12 separate each other, and reinforcing bar anchor hole 12 runs through pile

end anchor plate

1, and 11 inner walls in stretch-draw screw hole are equipped with the stretch-draw screw thread. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of the large opening to the small opening is 1.5: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 1.5: 1, the taper angle beta range is suitable for the shape and the angle of a matched reinforcing steel bar upset head, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar upset head can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar upset head moves to a bar body of the reinforcing steel bar, and therefore the upset head is prevented from being damaged.

In this embodiment, every two tensioning screw holes 11 and one reinforcing steel bar anchoring hole 12 form a group (i.e. the number ratio of the tensioning screw holes 11 to the reinforcing steel bar anchoring holes 12 is 2: 1), and 12 groups are uniformly distributed on the pile end anchoring plate 1. The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the connecting line of the centers (namely the circle centers) of the pile end anchoring plates 1 respectively, and the range of the alpha is 6-45 degrees. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 2: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Preferably, the centers of the 12 sets of tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are located on a circumference which takes the center of the pile-end anchoring plate 1 as an origin and the distance from the center of the pile-end anchoring plate 1 to the center of the tensioning screw hole 11 (or the reinforcing steel bar anchoring hole 12) as a radius. Correspondingly, the number and the distribution condition of the main reinforcements of the reinforcement cage to be assembled are uniformly distributed in a circular shape, and the corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also distributed in a circular shape.

In this embodiment, a recessed step is provided at an edge of one side of the pile-end anchoring plate 1, so that the pile-end anchoring plate 1 is conveniently fitted with pile ferrules at two ends of a precast pile when the precast pile is assembled.

According to the reinforced pile-end anchoring plate with separated anchors and tension, the groove or the rib groove in the prior art is eliminated, so that the processing cost of the pile-end anchoring plate 1 is reduced, and the rigidity of the pile-end anchoring plate 1 is improved; the conical steel bar anchoring hole 12 is adapted to the steel bar heading, so that the contact area of the steel bar heading and the pile-end anchoring plate 1 is increased, and the anchoring performance of the steel bar and the pile-end anchoring plate 1 is effectively improved; the included angle alpha between the tensioning screw hole 11 and the reinforcing steel bar anchoring hole 12 is 6-45 degrees, so that the stress concentration phenomenon of the pile end anchoring plate 1 in the tensioning process of the reinforcing steel bar is effectively reduced. The deformation of the pile-end anchoring plate 1 is avoided, and the tensile property of the pile-end anchoring plate 1 is improved; therefore, the steel pipe has the characteristics of simple structure, high pulling resistance and horizontal bearing capacity, low manufacturing cost, high construction efficiency and the like, and has good application prospect.

Example 4

As shown in fig. 5, this embodiment discloses an anchor-tensioning separated enhancement type pile end anchoring plate, and pile end anchoring plate 1 is wholly circular in the excircle, including stretch-draw screw hole 11 and reinforcing bar anchoring hole 12, stretch-draw screw hole 11 and reinforcing bar anchoring hole 12 separate each other, and reinforcing bar anchoring hole 12 runs through pile

end anchoring plate

1, and 11 inner walls of stretch-draw screw hole are equipped with stretch-draw screw thread. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of the large opening to the small opening is 1.5: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 1.5: 1, the taper angle beta range is suitable for the shape and the angle of a matched reinforcing steel bar upset head, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar upset head can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar upset head moves to a bar body of the reinforcing steel bar, and therefore the upset head is prevented from being damaged.

In this embodiment, the tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 correspond to each other one by one, and there are 12 groups in total, and they are uniformly distributed on the pile end anchoring plate 1. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 1: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates.

The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the central connecting line of the pile end anchoring plate 1 respectively, and the range of the alpha is 6-45 degrees. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Preferably, in this embodiment, the pile-end anchoring plate 1 is further provided with trapezoidal latch teeth 13 facing the inside, the number of the latch teeth 13 is 5, the latch teeth are uniformly distributed on the inside of the pile-end anchoring plate 1, and an included angle δ of the upper ends of the trapezoidal latch teeth 13 is 90 ° to 140 °. The latch 13 enables the pile end anchoring plate 1 to be mutually clamped and fixed with the corresponding clamping structures on the head and tail plates in the precast pile production process; the latch is in a trapezoid shape, the actual shape is that the lower bottom edge is superposed with the arc of the inner side (the lower bottom edge is the arc actually), the length of the upper bottom is smaller than that of the lower bottom, and the two waists are equal; therefore, the included angle delta of the upper end of the trapezoidal latch 13 is set to be 90-140 degrees, the strength of the trapezoidal latch is increased in the range, the upper bottom is shorter, and the trapezoidal latch can be conveniently clamped with other clamping structures. In this embodiment, a recessed step is provided at an edge of one side of the pile-end anchoring plate 1, so that the pile-end anchoring plate 1 is conveniently fitted with pile ferrules at two ends of a precast pile when the precast pile is assembled.

Example 5

As shown in fig. 6, this embodiment discloses an anchor-tension separated enhancement type pile end anchoring plate, pile end anchoring plate 1 is wholly circular in the excircle (i.e. the front view is wholly circular), including tensioning screw hole 11 and reinforcing bar anchoring hole 12, tensioning screw hole 11 and reinforcing bar anchoring hole 12 separate each other, and reinforcing bar anchoring hole 12 runs through pile end anchoring plate 1, and tensioning screw thread is equipped with on 11 inner walls of tensioning screw hole. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of a large opening to a small opening (namely the upper opening and the lower opening in the figure 1) is 2: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 2: 1, the taper angle beta range is suitable for the shape and the angle of a matched reinforcing steel bar upset head, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar upset head can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar upset head moves to a bar body of the reinforcing steel bar, and therefore the upset head is prevented from being damaged.

In this embodiment, the tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 correspond to each other one by one (i.e., the number ratio of the tensioning screw holes 11 to the reinforcing steel bar anchoring holes 12 is 1: 1), and there are 12 groups in total, and the groups are uniformly distributed on the pile end anchoring plate 1. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 1: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the connecting line of the centers (namely the circle centers) of the pile end anchoring plates 1 respectively, and the range of the alpha is 6-45 degrees. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

In the preferred embodiment, in 12 groups, the tensioning screw hole 11 is located on a circumference with the center of the pile-end anchoring plate 1 as the origin and the distance from the pile-end anchoring plate 1 to the center of the tensioning screw hole 11 as the radius; the centers of the reinforcing steel bar anchoring holes 12 are all located on a circumference which takes the center of the pile-end anchoring plate 1 as an origin and the distance from the pile-end anchoring plate 1 to the center of the reinforcing steel bar anchoring hole 12 as a radius. The distance from the pile-end anchoring plate 1 to the center of the tensioning screw hole 11 is smaller than the distance from the pile-end anchoring plate 1 to the center of the reinforcing steel bar anchoring hole 12. Correspondingly, the number of the main reinforcements of the reinforcement cage to be assembled is 12, the main reinforcements are uniformly distributed in a circular shape, and the corresponding tensioning bolt mounting holes in the head and tail plates to be assembled are also distributed in a circular shape.

Example 6

As shown in fig. 7, this embodiment discloses an anchor-tensioning separated enhancement type pile end anchoring plate, pile end anchoring plate 1 is wholly circular in the excircle (i.e. the front view is wholly circular), including tensioning screw hole 11 and reinforcing steel bar anchoring hole 12, tensioning screw hole 11 and reinforcing steel bar anchoring hole 12 separate each other, and reinforcing steel bar anchoring hole 12 runs through pile end anchoring plate 1, and tensioning screw thread is equipped with on 11 inner walls of tensioning screw hole. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of a large opening to a small opening (namely the upper opening and the lower opening in the figure 1) is 2.2: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 2.2: 1, the taper angle beta range can be adapted to the shape and the angle of a matched reinforcing steel bar heading, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar heading can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar heading moves towards the rib body of the reinforcing steel bar, and therefore the heading is prevented from being damaged.

In this embodiment, every 5 tensioning screw holes 11 and 1 steel bar anchoring hole 12 form one group (that is, the number ratio of the tensioning screw holes 11 to the steel bar anchoring holes 12 is 5: 1), there are 10 groups in total, and the groups are uniformly distributed on the pile

end anchoring plate

1, and 5 tensioning screw holes 11 in each group are uniformly distributed around the steel bar anchoring holes 12. In this embodiment, 46 tensioning screw holes 11 may be omitted, and 4 tensioning screw holes 11 are uniformly distributed on the pile end anchoring plate 1, where the number ratio of the tensioning screw holes 11 to the reinforcing steel bar anchoring holes 12 is 0.4: 1. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in groups in a ratio of 5: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates.

In the preferred embodiment, in 10 groups, the centers of the reinforcing steel bar anchoring holes 12 in each group are all located on a circumference which takes the center of the pile-end anchoring plate 1 as the origin and the distance from the pile-end anchoring plate 1 to the center of the reinforcing steel bar anchoring hole 12 as the radius; the tensioning screw holes 11 at the corresponding positions in the 10 groups are positioned on the circumference which takes the center of the pile-end anchoring plate 1 as the origin and the distance from the pile-end anchoring plate 1 to the center of the tensioning screw hole 11 at the position as the radius. Correspondingly, the number of main bars of the reinforcement cage to be assembled is 10, the distribution condition is circular and uniform distribution, corresponding to the tensioning screw holes 11 at the same position in each group, and corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also circular.

Example 7

As shown in fig. 8, this embodiment discloses an anchor-tensioning separated reinforced pile end anchoring plate, and pile end anchoring plate 1 is wholly square outside and round inside hollow, and including tensioning screw hole 11 and reinforcing bar anchoring hole 12, tensioning screw hole 11 and reinforcing bar anchoring hole 12 separate each other, and reinforcing bar anchoring hole 12 runs through pile

end anchoring plate

1, and 11 inner walls of tensioning screw hole are equipped with the tensioning screw thread. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of the large opening to the small opening is 1.5: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 1.5: 1, the taper angle beta range can be adapted to the shape and the angle of a matched reinforcing steel bar heading, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar heading can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar heading moves towards the rib body of the reinforcing steel bar, and therefore the heading is prevented from being damaged.

In this embodiment, 1

tensioning screw hole

11 and 1 reinforcing steel bar anchoring hole 12 form one group (i.e. the ratio of the number of the tensioning screw holes 11 to the number of the reinforcing steel bar anchoring holes 12 is 1: 1), and there are 8 groups.

In the preferred embodiment, in 8 groups, the centers of the tensioning screw hole 11 and the reinforcing steel bar anchoring hole 12 are both located on a rectangle with the center of the pile-end anchoring plate 1 as the center, and specifically, the centers of the top and the sides of the rectangle are both provided with one tensioning screw hole 11. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 1: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. Correspondingly, the number of the main reinforcements of the reinforcement cage to be assembled is 8, the distribution condition is also rectangular, and the corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also rectangular.

The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the side of the pile end anchoring plate 1 respectively, and the range of the alpha is 6-45 degrees. Specifically, the center of the steel bar anchoring hole 12 is taken as a vertical foot, a rectangular side where the center of the steel bar anchoring hole 12 is located is taken as a vertical line towards the side of the pile-end anchoring plate 1 close to the point, the intersection point of the vertical line and the rectangular side and the center connecting line of the tensioning screw hole 11 are taken as, and the included angle between the connecting line and the vertical line is alpha. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Example 8

As shown in fig. 9, this embodiment discloses an anchor-tensioning separated reinforced pile end anchoring plate, and pile end anchoring plate 1 is wholly square outside and round inside hollow, and including tensioning screw hole 11 and reinforcing steel bar anchoring hole 12, tensioning screw hole 11 and reinforcing steel bar anchoring hole 12 separate each other, and reinforcing steel bar anchoring hole 12 runs through pile

end anchoring plate

In this embodiment, 1

tensioning screw hole

In the preferred embodiment, in 8 groups, the centers of the tensioning screw hole 11 and the reinforcing steel bar anchoring hole 12 are both located on a rectangle with the center of the pile-end anchoring plate 1 as the center, and specifically, the centers of the top and the sides of the rectangle are both provided with one tensioning screw hole 11. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 1: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. Correspondingly, the number of main reinforcements of the reinforcement cage to be assembled is 8, the distribution condition is also rectangular and uniformly distributed, and the corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also rectangular.

Preferably, in this embodiment, the pile-end anchoring plate 1 is further provided with trapezoidal latch teeth 13 facing the inside, the number of the latch teeth 13 is 5, the latch teeth are uniformly distributed on the inside of the pile-end anchoring plate 1, and an included angle δ of the upper ends of the trapezoidal latch teeth 13 is 90 ° to 140 °. The latch 13 enables the pile end anchoring plate 1 to be mutually clamped and fixed with the corresponding clamping structures on the head and tail plates in the precast pile production process; the latch is in a trapezoid shape, the actual shape is that the lower bottom edge is superposed with the arc of the inner side (the lower bottom edge is the arc actually), the length of the upper bottom is smaller than that of the lower bottom, and the two waists are equal; therefore, the included angle delta of the upper end of the trapezoidal latch 13 is set to be 90-140 degrees, the strength of the trapezoidal latch is increased in the range, the upper bottom is shorter, and the trapezoidal latch can be conveniently clamped with other clamping structures.

Example 9

As shown in fig. 10, this embodiment discloses an anchor-tensioning separated reinforced pile end anchoring plate, and pile end anchoring plate 1 is wholly square outside and round inside hollow, and includes tensioning screw hole 11 and reinforcing steel bar anchoring hole 12, and tensioning screw hole 11 and reinforcing steel bar anchoring hole 12 separate from each other, and reinforcing steel bar anchoring hole 12 runs through pile end anchoring plate 1, and tensioning screw thread is equipped with on 11 inner walls of tensioning screw hole. Wherein, the shape of the reinforcing steel bar anchoring hole 12 is conical, the range of the cone angle beta is 20 degrees to 180 degrees, and the diameter ratio of the large opening to the small opening is 1.5: 1. Reinforcing bar anchor hole 12 and stretch-draw screw hole 11 separate each other and run through stake end anchor plate 1, compare the groove of drawing that needs set up among the prior art, can increase stake end anchor plate 1's intensity to reduce the preparation degree of difficulty. The taper angle beta range of the reinforcing steel bar anchoring hole 12 is 20-180 degrees, the ratio of the diameters of large and small holes is set to be 1.5: 1, the taper angle beta range can be adapted to the shape and the angle of a matched reinforcing steel bar heading, on one hand, the taper shape is adopted, the contact range of the taper angle beta range and the reinforcing steel bar heading can be enlarged, on the other hand, when the taper angle range is larger than 20 degrees, the stress applied to the corresponding reinforcing steel bar heading moves towards the rib body of the reinforcing steel bar, and therefore the heading is prevented from being damaged.

In this embodiment, 2 tensioning screw holes 11 and 1 reinforcing steel bar anchoring hole 12 form one group (i.e. the ratio of the number of the tensioning screw holes 11 to the number of the reinforcing steel bar anchoring holes 12 is 2: 1), and there are 8 groups.

In the preferred embodiment, in 8 groups, the centers of the reinforcing steel bar anchoring holes 12 are all located on a rectangle centering on the center of the pile-end anchoring plate 1, and specifically, the centers of the vertexes and sides of the rectangle are all provided with a tensioning screw hole 11. A steel bar anchoring hole 12 corresponding to a tension screw hole 11 positioned at the center of the side of the rectangle is positioned on the rectangle; the reinforcing steel bar anchoring holes 12 corresponding to the tension screw holes 11 located at the vertex are located on the diagonal lines of the rectangle. The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 2: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. Correspondingly, the number of the main reinforcements of the reinforcement cage to be assembled is 8, the distribution condition is also rectangular, and the corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also rectangular.

The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the side of the pile end anchoring plate 1 respectively, and the range of the alpha is 6-45 degrees. Specifically, the center of the steel bar anchoring hole 12 is used as a vertical leg, a rectangular side where the center of the steel bar anchoring hole 12 is located is made to the side of the pile-end anchoring plate 1 closer to the point, a vertical line is made to the rectangular side, an intersection point of the vertical line and the rectangular side and the center of the tensioning screw hole 11 are made to be a connecting line, an included angle between the connecting line and the vertical line is α, and in the embodiment, only the tensioning screw hole 11 in the center of the rectangular side and the corresponding steel bar anchoring hole 12 have an included angle α. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Example 10

As shown in fig. 11, this embodiment discloses an anchor-tensioning separated reinforced pile end anchoring plate, and pile end anchoring plate 1 is wholly square outside and round inside hollow, and including tensioning screw hole 11 and reinforcing steel bar anchoring hole 12, tensioning screw hole 11 and reinforcing steel bar anchoring hole 12 separate each other, and reinforcing steel bar anchoring hole 12 runs through pile

end anchoring plate

In this embodiment, 2 tensioning screw holes 11 and 1 reinforcing bar anchoring hole 12 form a set (i.e. the number ratio of the tensioning screw holes 11 to the reinforcing bar anchoring holes 12 is 2: 1), there are 8 sets, and the tensioning screw holes 11 in each set are respectively disposed on two sides of the reinforcing bar anchoring holes 12 and located on the same straight line.

In the preferred embodiment, in 8 groups, the centers of the reinforcing steel bar anchoring holes 12 are all located on a rectangle centering on the center of the pile-end anchoring plate 1, and specifically, the centers of the vertexes and sides of the rectangle are all provided with a tensioning screw hole 11. A steel bar anchoring hole 12 corresponding to a tension screw hole 11 positioned at the center of the side of the rectangle is positioned on the rectangle; and the stretching screw holes 11 at the top points correspond to the reinforcing steel bar anchoring holes 12, are positioned on the rectangular side close to the inner side, and are positioned on the extension line of the rectangular side close to the outer side.

The tensioning screw holes 11 and the reinforcing steel bar anchoring holes 12 are uniformly distributed in a group in a ratio of 2: 1, so that the manufacturing process and difficulty can be reduced, and the tensioning screw holes are adaptive to the shape of a reinforcing steel bar cage to be assembled, the number of reinforcing steel bars and the number and distribution of the tensioning holes in the head and tail plates. Correspondingly, the number of the main reinforcements of the reinforcement cage to be assembled is 8, the distribution condition is also rectangular, and the corresponding tensioning bolt mounting holes on the head and tail plates to be assembled are also rectangular.

The center of the tensioning screw hole 11 and the center of the reinforcing steel bar anchoring hole 12 form an included angle alpha with the side of the pile end anchoring plate 1 respectively, and the range of the alpha is 6-45 degrees. Specifically, the center of the steel bar anchoring hole 12 is taken as a vertical foot, a rectangular side where the center of the steel bar anchoring hole 12 is located is made to the side of the pile-end anchoring plate 1 closer to the point, a vertical line is made, a connecting line is made between the intersection point of the vertical line and the rectangular side and the center of the tensioning screw hole 11, and the included angle between the connecting line and the vertical line is alpha. When the range of alpha is 6-45 degrees, the center of the tensioning screw hole 11 is closer to the reinforcing steel bar anchoring hole 12, the stress extreme value borne by the whole pile end anchoring plate 1 at the moment is smaller, and the tensile property is better.

Example 11

As shown in fig. 12 to 15, the present embodiment discloses a reinforced precast pile, including the reinforced pile-end anchoring plate 1 with separated anchors according to any one of embodiments 1 to 10, further including a pile body and a reinforcement cage, where the pile-end anchoring plate 1 is respectively disposed at two ends of the pile body, the reinforcement cage includes prestressed reinforcements 2 and spiral stirrups 3 disposed at outer sides of the prestressed reinforcements 2, the number of the prestressed reinforcements 2 is the same as or less than that of the reinforcement anchoring holes 12, both ends of the prestressed reinforcements 2 are provided with upsets 21, and the upsets 21 are disposed in the reinforcement anchoring holes 12; the diameters of the maximum end 211 and the minimum end 212 of the steel bar heading 21 are respectively smaller than the diameter of the large opening and the diameter of the small opening of the steel bar anchoring hole 12; the thickness H of the pile-end anchoring plate 1 is larger than the height H of the steel bar heading 21.

The upset 21 of the prestressed reinforcement 2 is a conical upset 21, and the cone angle theta is 20-180 degrees. The pile body includes concrete 4 and stake cuff 5, and concrete 4 parcel steel reinforcement cage, stake cuff 5 sets up the both ends at the pile body. One end of the pile sleeve 5 extending out of the concrete 4 is matched with a step on one side edge of the pile-end anchoring plate 1. The side of the pile sleeve 5 contacting the concrete 4 is provided with a metal indentation 51, in this embodiment, the metal indentation 51 is hexagonal, and other shapes can be used in practical production.

The pile-end anchoring plate 1 and the pile hoops 5 can be better connected through the steps of the pile-end anchoring plate 1 and the pile hoops 5; the metal indentation 51 is arranged on the inner side of the pile sleeve 5, so that the bonding performance of the pile sleeve 5 and the pile body concrete 4 is effectively improved.

In this embodiment, the taper angle of the tapered upset head 21 adopted by the precast pile is set to be more than 20 °, the performance of the steel bar upset head 21 is optimal, and the stress performance of the steel bar can be improved. The precast pile of this embodiment realizes the mechanical connection of reinforcing bar and anchor board through structures such as stake end anchor board 1, reinforcing bar, has simple structure, resistance to plucking and the horizontal bearing capacity height, the reinforcing bar anchor board performance at stake both ends is excellent, the cost is low, characteristics such as efficiency of construction height, can satisfy the needs of economic nature and security in the production process.

Example 12

As shown in fig. 12-14 and 16, the present embodiment discloses a reinforced precast pile, including the reinforced pile-end anchoring plate 1 with separated anchor tension according to any one of embodiments 1 to 10, further including a pile body and a reinforcement cage, where the pile-end anchoring plate 1 is respectively disposed at two ends of the pile body, the reinforcement cage includes prestressed reinforcements 2 and helical stirrups 3 disposed at outer sides of the prestressed reinforcements 2, the number of the prestressed reinforcements 2 is the same as or less than that of the reinforcement anchoring holes 12, both ends of the prestressed reinforcements 2 are provided with upsets 21, and the upsets 21 are disposed in the reinforcement anchoring holes 12; the diameters of the maximum end 211 and the minimum end 212 of the steel bar heading 21 are respectively smaller than the diameter of the large opening and the diameter of the small opening of the steel bar anchoring hole 12; the thickness H of the pile-end anchoring plate 1 is larger than the height H of the steel bar heading 21.

The upset 21 of the prestressed reinforcement 2 is a conical upset 21, and the cone angle theta is 20-180 degrees. The pile body includes concrete 4 and stake cuff 5, and concrete 4 parcel steel reinforcement cage, stake cuff 5 sets up the both ends at the pile body. One end of the pile sleeve 5 extending out of the concrete 4 is matched with a step on one side edge of the pile-end anchoring plate 1. The side of the pile hoop 5 in contact with the concrete 4 is provided with a metal indentation 51.

In the preferred embodiment, the outer surface of the prestressed reinforcement 2 is provided with the concave or convex screw thread 22, so that the contact area between the prestressed reinforcement 2 and the concrete 4 can be increased, and the strength of the precast pile can be increased.

Example 13

As shown in fig. 12-14 and 17, the present embodiment discloses a reinforced precast pile, including the reinforced pile-end anchoring plate 1 with separated anchor tension according to any one of embodiments 1 to 10, further including a pile body and a reinforcement cage, where the pile-end anchoring plate 1 is respectively disposed at two ends of the pile body, the reinforcement cage includes prestressed reinforcements 2 and helical stirrups 3 disposed at outer sides of the prestressed reinforcements 2, the number of the prestressed reinforcements 2 is the same as or less than that of the reinforcement anchoring holes 12, both ends of the prestressed reinforcements 2 are provided with upsets 21, and the upsets 21 are disposed in the reinforcement anchoring holes 12; the diameters of the maximum end 211 and the minimum end 212 of the steel bar heading 21 are respectively smaller than the diameter of the large opening and the diameter of the small opening of the steel bar anchoring hole 12; the thickness H of the pile-end anchoring plate 1 is larger than the height H of the steel bar heading 21.

In the preferred embodiment, the sealing device 23 is disposed outside the upset head 21 of the prestressed reinforcement 2, the sealing device 23 comprises a non-metallic material, and the sealing device 23 can withstand a temperature of at least 60 °. By arranging the sealing device 23, the situation that the upset head 21 rusts after contacting with the external environment can be prevented, the service life of the upset head is prolonged, and therefore the strength and the safety of the precast pile are improved.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an anchor-tension separated enhancement mode pile tip anchor plate which characterized in that: the pile end anchoring device comprises a tensioning screw hole and a steel bar anchoring hole, wherein the tensioning screw hole and the steel bar anchoring hole are separated from each other, the steel bar anchoring hole penetrates through a pile end anchoring plate, and tensioning threads are arranged on the inner wall of the tensioning screw hole; the included angle alpha between the center of the tensioning screw hole and the center of the reinforcing steel bar anchoring hole and the central connecting line or the side line of the pile end anchoring plate is 6-45 degrees, the reinforcing steel bar anchoring hole is conical, and the cone angle beta of the reinforcing steel bar anchoring hole is 20-180 degrees.

2. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: and an oblique angle is arranged at one end of the steel bar anchoring hole close to the inner side of the pile end anchoring plate.

3. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: the number ratio of the tension screw holes to the reinforcing steel bar anchoring holes is 0.4-5.

4. The anchor-tensioning split reinforced pile-end anchor plate of claim 3, wherein: when the number ratio of the tensioning screw holes to the steel bar anchoring holes is larger than 1, the tensioning screw holes and the steel bar anchoring holes are distributed in groups, and the tensioning screw holes in each group are uniformly distributed around the steel bar anchoring holes.

5. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: the cross section of the pile end anchoring plate comprises an excircle and inner circle hollow shape, an exterior and inner circle hollow shape or a polygonal solid shape.

6. The anchor-tensioning split reinforced pile-end anchor plate of claim 5, wherein: the centers of the tensioning screw holes and the reinforcing steel bar anchoring holes are distributed on the pile end anchoring plate according to the circumferences with the same or different radiuses, or are distributed according to the same rectangle or different rectangles, or are distributed on the same straight line according to the tensioning screw holes and the reinforcing steel bar anchoring holes in each group.

7. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: the pile end anchoring plate is provided with a latch.

8. The anchor-tensioning split reinforced pile-end anchor plate of claim 7, wherein: the number of the latch teeth is more than 4, the latch teeth are trapezoidal, and the included angle delta of the upper end of the trapezoid is 90-140 degrees.

9. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: the ratio of the diameter of the large opening to the diameter of the small opening of the steel bar anchoring hole is (1.5-2.2) to 1.

10. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: one side edge of the pile end anchoring plate is provided with a sunken step.

11. The anchor-tensioning split reinforced pile-end anchor plate of claim 1, wherein: the cross section of one side of the pile end anchoring plate, which is contacted with the concrete, is larger than the area of the cross section of the other side of the pile end anchoring plate, so that the end part of the pile end anchoring plate, which is close to the concrete, forms a clamping table.

12. A precast pile is characterized in that: the reinforced pile-end anchoring plate with separated anchoring and tensioning according to any one of claims 1 to 11, further comprising a pile body and a reinforcement cage, wherein the pile-end anchoring plates are respectively arranged at two ends of the pile body,

13. A precast pile as recited in claim 12, wherein: the diameters of the maximum end and the minimum end of the upset head are respectively smaller than the diameter of a large opening and the diameter of a small opening of the steel bar anchoring hole; the thickness H of the pile end anchoring plate is larger than the height H of the steel bar heading.

14. A precast pile as recited in claim 12, wherein: the end of the pile sleeve hoop extending out of the concrete is matched with the step on the side edge of the pile-end anchoring plate.

15. A precast pile as recited in claim 12, wherein: and a metal indentation is arranged on one side of the pile hoop, which is in contact with the concrete.

16. A precast pile as recited in claim 12, wherein: the heading of the prestressed reinforcement is a conical heading, and the cone angle theta of the heading is 20-180 degrees.

17. An augmented precast pile as recited in claim 12, wherein: the outer surface of the prestressed reinforcement is provided with concave or convex threads.

18. A precast pile as recited in claim 12, wherein: and a sealing device is arranged on the outer side of the heading of the prestressed reinforcement.

19. A precast pile as recited in claim 18, wherein: the seal comprises a non-metallic material, the seal being able to withstand temperatures of at least 60 °.