CN218291920U - Concrete precast pile - Google Patents

Abstract

The utility model provides a concrete precast pile, including the pile body, the pile body tip has the protection subassembly, the inside rigidity skeleton that has pre-buried in the concrete of pile body, the rigidity skeleton includes by many main muscle interval arrangements and encircles main muscle battle array and the outer loop that forms content space and winds the stirrup of main muscle battle array, the protection subassembly includes: the hoop, the net piece connected to the hoop, and a plurality of reinforcing ribs with end parts connected to the net piece, wherein the other ends of the reinforcing ribs are connected with the main ribs or the hoops. Through the intensity of cuff, net piece and strengthening rib reinforcing pile body tip for the protection subassembly effectively protects pile body tip, and net piece and strengthening rib are connected, and when pile body tip received the hammering, the strengthening rib formed to support and more effectual will do all can the power transmission for the rigidity skeleton to the net piece, so that the pile body tip is difficult because of relapseing hammering breakage or fracture.

Description

Concrete precast pile

Technical Field

The utility model relates to a precast concrete pile technical field, concretely relates to precast concrete pile.

Background

The precast concrete pile has the advantages of low production cost, capability of bearing larger load, firmness and durability, high construction speed, simple construction, low technical difficulty and excellent performance, and can be widely applied to engineering construction of buildings, roads, bridges, wharfs and the like.

In the concrete precast pile construction process, the hammering pile sinking is the most common pile sinking method for the concrete precast pile due to the high construction speed, the mechanization degree is high, the application range is wide, the field civilization degree is high, the hammering pile sinking utilizes the instantaneous impact mechanical energy when the pile hammer falls down, the resistance of a soil body to the pile is overcome, the static balance state of the pile body is damaged, the pile body sinks, a new static balance state is reached, the pile head is repeatedly hammered, the pile body also sinks continuously, but the problems of pile head breaking, cracking and the like are easily caused by repeated hammering, and the pile sinking quality is seriously influenced.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that current precast pile terminal surface intensity is low, the utility model provides a concrete precast pile.

For realizing the purpose of the utility model, the utility model adopts the following technical proposal:

the utility model provides a concrete precast pile, includes the pile body, pile body tip has the protection subassembly, the inside rigid framework that has pre-buried in the concrete of pile body, rigid framework includes by many main muscle interval arrangements and encircles main muscle battle array and the outer loop that forms the content space and winds the stirrup of main muscle battle array, the protection subassembly includes: the hoop, connect in the net piece of hoop, many tip connect in the strengthening rib of net piece, the strengthening rib other end is connected the main muscle or the stirrup.

Compared with the prior art, the beneficial effects of the utility model are that: through the intensity of cuff, net piece and strengthening rib reinforcing pile body tip for the protection subassembly effectively protects pile body tip, and net piece and strengthening rib are connected, and when pile body tip received the hammering, the strengthening rib formed to support and more effectual will do all can the power transmission for the rigidity skeleton to the net piece, so that the pile body tip is difficult for because of beating repeatedly broken or the fracture.

Preferably, one end of the reinforcing rib connected with the mesh is a first connecting point, one end of the reinforcing rib connected with the main rib or the stirrup is a second connecting point, and an included angle alpha is formed between a connecting line between at least part of the first connecting point and the second connecting point of the reinforcing rib and the central axis of the pile body, wherein the included angle alpha is more than or equal to 20 degrees and less than or equal to 80 degrees.

Preferably, at least part of the reinforcing ribs pass through a central axis of the inner space.

Preferably, at least part of the reinforcing ribs are connected with the mesh at multiple points.

Preferably, the cuff includes circumference hoop the angle bead cover of pile body tip and by the angle bead board that angle bead cover front end is buckled towards pile body axis direction and is extended, the front end of angle bead cover with pile body top surface parallel and level, the angle bead board covers the part at least pile body top surface.

Preferably, the reinforcing ribs and the ribs of the mesh are of an integral structure; or the reinforcing ribs and the mesh sheets are welded or clamped or bound or hooped or bonded, and the reinforcing ribs and the corner protection sleeves or the corner protection plates are welded or clamped or bonded.

Preferably, the reinforcing rib is welded, hooped or bonded with the main rib or the hoop rib.

Preferably, the corner protector is an annular body closed in the circumferential direction, the inner side of the corner protector is provided with more than one annular groove or thread-shaped groove, and the rear end of the corner protector is in an outward-expanding horn shape.

Preferably, the corner protector and the corner protector plate are formed into the ferrule by welding, press-molding or casting.

Preferably, the corner protection plate is connected with a plurality of connecting nuts, the connecting nuts are annularly arranged on the corner protection plate at equal intervals, the connecting nuts are connected with the end parts of the main ribs, and the circumferential edge of each connecting nut is provided with more than one reinforcing rib;

the corner protection plate is provided with a mounting hole, and the inner cavity of the connecting nut is communicated with the mounting hole; or a plurality of mounting holes are annularly arranged on the corner protection plate at equal intervals, and the inner cavity of the connecting nut is communicated with the corresponding mounting holes.

Preferably, the circumferential outer side surface of the connecting nut is connected with the reinforcing rib.

Preferably, the diameter of the mounting hole is larger than or equal to the inner diameter of the connecting nut.

Preferably, the top surface of the connecting nut is flush with or lower than the top surface of the mounting hole.

Preferably, the connecting nut is fixed on the corner protection plate in a welding, clamping or threaded connection mode.

Preferably, coupling nut's tip has the joint boss, coupling nut has the mounting groove that runs through circumference lateral wall in joint boss one side, the upset head of main muscle passes through the mounting groove and gets into in the coupling nut and with the spacing joint of joint boss.

Preferably, the connecting nut is internally threaded or bonded with a sealing stopper, the sealing stopper is positioned at the front end of the mounting groove, the sealing stopper is provided with a mounting part, and the mounting part is a screwing groove or a screwing protrusion.

Preferably, the sealing barrier is a sealing baffle.

Preferably, the hoop surrounds the main rib array for one circle, at least part of the hoop forms an inward-folded section which is concave towards the direction close to the content space between two adjacent main ribs, and at least part of the hoop forms an arched section which is arched towards the direction far away from the content space between two adjacent main ribs.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a concrete precast pile according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a connection state of the protection component and the rigid frame in the embodiment of the present invention;

fig. 3 is a schematic perspective view of a protection component in an embodiment of the present invention;

FIG. 4 is a schematic perspective view of an embodiment of the present invention;

FIG. 5 is a schematic perspective view of the connection state of the ferrule and the mesh sheet according to the embodiment of the present invention;

FIG. 6 is a plan view of a state in which the ferrule and the coupling nut are coupled according to the embodiment of the present invention;

fig. 7 is a schematic perspective view of a coupling nut according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of the embodiment of the present invention showing the connection between the connecting nut and the upset head of the main rib and the seal stopper;

fig. 9 is a schematic perspective view of a sealing stopper according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of a concrete precast pile according to an embodiment of the present invention.

Reference numerals: 10. pile body; 1. a protection component; 11. a ferrule; 111. a corner protecting sleeve; 112. corner protecting plates; 12. a mesh sheet; 13. reinforcing ribs; 2. a rigid skeleton; 21. a main rib; 211. heading; 22. hooping; 221. an inflected section; 222. an arching section; 223. a circular arc section; 23. a content space; 3. a connecting nut; 31. mounting grooves; 32. clamping the boss; 4. mounting holes; 5. a seal stop; 51. a mounting portion.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

In this document, terms such as "upper, lower, inner, and outer" are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, the terms are not to be interpreted as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any actual relationship or order between such elements.

The first embodiment,

Referring to fig. 1 to 5, this embodiment provides a concrete precast pile, including pile shaft 10, pile shaft 10 tip has protection component 1, and pile shaft 10 is inside to have pre-buried in the rigid framework 2 of concrete, and rigid framework 2 includes by many main muscle 21 interval arrangements and encircle the main muscle battle array that forms content space 23 and the stirrup 22 of outer surrounding main muscle battle array, and protection component 1 includes: a hoop 11, a mesh sheet 12 connected to the hoop 11, and a plurality of reinforcing ribs 13 having end portions connected to the mesh sheet 12, and the other ends of the reinforcing ribs 13 are connected to a main rib 21 or a stirrup 22. Through the intensity of cuff 11, net piece 12 and strengthening rib 13 reinforcing pile body 10 tip for protection subassembly 1 effectively protects pile body 10 tip, and net piece 12 and strengthening rib 13 are connected, and when pile body 10 tip received the hammering, strengthening rib 13 formed the support and more effective transmit the power to rigid frame 2 to net piece 12, so that pile body 10 tip is difficult because of repeatedly hammering breakage or fracture.

Specifically, when the precast concrete pile is manufactured, the hoop 11 and the mesh 12 are sleeved at the end part of the rigid framework 2, one end of the reinforcing rib 13 is connected to the mesh 12, the other end of the reinforcing rib is connected to the main rib 21 or the hoop 22, then the rigid framework 2 and the protection assembly 1 are placed in a forming die for pouring concrete, the outer side of the hoop 11 abuts against the inner side of a side template of the die, so that the concrete at the end part of the precast concrete pile after forming is hooped by the hoop 11 to protect the end part of the pile body 10, and the end part of the pile body 10 is provided with the mesh 12 and the reinforcing rib 13 to enhance the strength of the mesh 12 and the reinforcing rib 13, so that the end part of the pile body 10 can be effectively protected, and the end part of the pile body 10 is not easy to be broken or cracked due to repeated hammering. Referring to fig. 5, the mesh sheet 12 mounted on the hoop 11 may be a double-layer mesh sheet, and the reinforcing ribs 13 are connected to both the two layers of mesh sheets 12 to reinforce the strength of the end portion of the pile body 10.

Preferably, referring to fig. 2 to 4, one end of the reinforcing rib 13 connected to the mesh 12 is a first connection point, one end of the reinforcing rib 13 connected to the main rib 21 or the hoop 22 is a second connection point, and an included angle α formed by a connection line between the first connection point and the second connection point of at least part of the reinforcing rib 13 and the central axis of the pile body 10 is greater than or equal to 20 ° and less than or equal to 80 °, that is, the reinforcing rib 13 is obliquely arranged or bent relative to the length direction of the pile body 10, so that not only is the length of the reinforcing rib 13 increased, but also the strength of the end portion of the pile body 10 is further enhanced, and the strength of the end portion of the pile body 10 can also be enhanced in the length direction and the radial direction of the pile body 10.

Preferably, referring to fig. 3, at least a part of the reinforcing ribs 13 pass through the central axis of the content space 23, specifically, one end of at least a part of the reinforcing ribs 13 is connected to the mesh 12, and the other end of the reinforcing ribs 13 passes through the central axis of the content space 23 and then is connected to the main rib 21 or the stirrup 22, so that not only is the length of the reinforcing ribs 13 increased and the strength of the end part of the pile body 10 further enhanced, but also the strength of the content space 23 is enhanced and the possibility of concrete crushing or cracking at the content space 23 is reduced because the reinforcing ribs 13 are at least partially positioned in the content space 23 of the main rib array.

Preferably, referring to fig. 3, at least some of the ribs 13 are connected to the mesh 12 at multiple points, so as to increase the connection strength between the ribs 13 and the mesh 12, further enhance the support of the mesh 12 by the ribs 13, and further enhance the strength of the end of the pile body 10.

Preferably, referring to fig. 2 to 5, the ferrule 11 includes a corner protector 111 circumferentially surrounding the end of the pile body 10 and a corner protector 112 extending from the front end of the corner protector 111 toward the central axis of the pile body 10, the front end of the corner protector 111 is flush with the top surface of the pile body 10, the corner protector 112 at least covers a part of the top surface of the pile body 10, the corner protector 111 protects the side end of the pile body 10 in the longitudinal direction, and the corner protector 112 protects the top surface of the pile body 10, and more preferably, the corner protector 111 and the corner protector 112 are integrally formed into the ferrule 11 by welding, pressing or casting, but not limited to these processing methods, as long as the corner protector 111 and the corner protector 112 can be effectively connected. The front end refers to the end of the angle bead sleeve 111 close to the top surface of the pile body 10, and the reverse refers to the end of the angle bead sleeve 111 far away from the top surface of the pile body 10.

Preferably, the reinforcing ribs 13 and the ribs of the mesh sheet 12 are integrated, specifically, when the protection assembly 1 is manufactured, the mesh sheet 12 is welded to the hoop 11, and the ribs of the mesh sheet 12 are bent and extended in the central axis direction of the volume space 23 at the welding position with the hoop 11 to form the reinforcing ribs 13, and then are connected with the main ribs 21 or the hoop ribs 22; or the reinforcing ribs 13 and the mesh sheets 12 are hooped or bound or welded or clamped or bonded, of course, the connection method is not limited to these connection methods, as long as the reinforcing ribs 13 and the mesh sheets 12 can be effectively connected, preferably, the reinforcing ribs 13 are also connected with the corner protection sleeves 111 or the corner protection plates 112, so that the connection and support effect of the reinforcing ribs 13 is enhanced, and the strength of the end part of the pile body 10 is further enhanced.

Preferably, the reinforcing rib 13 is welded, hooped or bonded with the main rib 21 or the stirrup 22; of course, the present invention is not limited to these connection methods, as long as the reinforcing rib 13 can be effectively connected to the main rib 21 or the stirrup 22, and it is preferable that the reinforcing rib 13 is connected to the main rib 21 to enhance the force transmission effect.

Preferably, referring to fig. 2 to 3 and 5, the corner protector 111 is a circumferentially closed annular body, and the inside of the corner protector 111 has one or more annular grooves or thread-shaped grooves, referring to fig. 2 to 3, and the inside of the corner protector 111 has annular protrusions, referring to fig. 5, and the inside of the corner protector 111 has thread-shaped protrusions, and the annular grooves or thread-shaped grooves can improve the structural strength of the corner protector 111 and the bonding strength with the concrete precast pile, and preferably, the inside of the corner protector 111 has thread-shaped protrusions.

The existing corner protection sleeve 111 cannot be effectively abutted to the inner side of a side template of a mold, the existing gap is large, the connection is not tight, the sealing is not tight, and slurry leakage at two ends of a product is caused.

Example II,

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

Referring to fig. 1 to 9, the concrete precast pile provided by the present embodiment has such a different structural design as compared to the first embodiment:

referring to fig. 2 and 6, the corner protection plate 112 is connected with a plurality of connecting nuts 3, the connecting nuts 3 are connected with the ends of the main ribs 21, and the mechanical connecting structures are connected through the connecting nuts 3 to realize the butt joint of adjacent precast concrete piles. A plurality of coupling nuts 3 are arranged on the corner plate 112 at equal intervals in an annular manner, and may be arranged in a circular manner or a square manner, and are arranged according to the shape of the pile body 10 or the shape of the rigid frame 2. The circumferential edge of the connecting nut 3 is provided with more than one reinforcing rib 13, preferably, the circumferential edges of a plurality of connecting nuts 3 are provided with the reinforcing ribs 13, and the strength of the end part of the pile body 10 is enhanced.

Specifically, referring to fig. 6, the corner protection plate 112 may be provided with a mounting hole 4, the connecting nuts 3 are annularly spaced along the mounting hole 4, and the inner cavities of the connecting nuts 3 are all communicated with the mounting hole 4, so that the inner cavities of the connecting nuts 3 are exposed to be capable of being connected with a mechanical connection structure; alternatively, referring to fig. 5, the angle-protecting plate 112 has a plurality of mounting holes 4 arranged in a ring shape at equal intervals, and the inner cavity of the connecting nut 3 is communicated with the corresponding mounting hole 4, so that the inner cavity of the corresponding connecting nut 3 is exposed to enable connection of the mechanical connecting structure. The connecting nut 3 is preferably fixed to the corner plate 112 by welding, snapping or screwing. Of course, the present invention is not limited to these connection methods, as long as the connection nut 3 can be effectively connected to the corner protection plate 112.

Preferably, referring to fig. 2 to 3, the circumferential outer side surface of the connecting nut 3 is connected with a reinforcing rib 13 to reinforce the strength of the end part of the pile body 10.

Preferably, the diameter of the mounting hole 4 is larger than or equal to the inner diameter of the connecting nut 3, so that the mounting hole 4 is prevented from interfering with the connection of the connecting nut 3 and the mechanical connecting structure.

Preferably, the top surface of the connecting nut 3 is flush with the top surface of the mounting hole 4 or lower than the top surface of the mounting hole 4, that is, the connecting nut 3 sinks relative to the end surface of the pile body 10, so that the damage or deformation of the connecting nut 3 caused during the transportation or construction of the concrete precast pile is avoided.

Preferably, referring to fig. 7 to 8, the inner side of the end of the coupling nut 3 is provided with a clamping boss 32, and the upset 211 of the main rib 21 can form a limiting block with the clamping boss 32. Connecting nut 3 has the mounting groove 31 that runs through circumference lateral wall in joint boss 32 one side, and the upset 211 of main muscle 21 passes through mounting groove 31 and gets into connecting nut 3 in and with the spacing joint of joint boss 32, makes things convenient for connecting nut 3 and main muscle 21 to be connected.

Preferably, referring to fig. 8 to 9, the coupling nut 3 is internally threaded or bonded with a sealing stopper 5, the sealing stopper 5 is located at the front end of the mounting groove 31, the sealing stopper 5 has a mounting portion 51, the mounting portion 51 is a screwing groove or a screwing protrusion, and concrete entering the coupling nut 3 from the mounting groove 31 is stopped by the sealing stopper 5, so as to avoid affecting the connection between the other side of the coupling nut 3 and the mechanical connection structure. Specifically, as shown in fig. 8 and 9, the sealing stopper 5 has an external thread, the coupling nut 3 has an internal thread, and after the coupling nut 3 is coupled to the main rib 21, the sealing stopper 5 is installed in the coupling nut 3, and then the rigid frame 2 and the protective member 1 are placed in a mold and concrete is poured. More preferably, as shown in fig. 9, the sealing stopper 5 is a sealing baffle, or the sealing stopper 5 is a sealing nut with a blind hole, the mechanical connecting structure is installed in the sealing nut, and the installation part 51 at the end of the sealing nut is an inner hexagonal or inner octagonal screwing part.

Example III,

In this embodiment, the same portions as those in the first and second embodiments are given the same reference numerals, and the same description is omitted.

Referring to fig. 1 to 10, the concrete precast pile provided by this embodiment has such a different structural design compared to the first and second embodiments:

in one circle of the stirrup 22 surrounding the main rib array, at least a part of the stirrup 22 forms an inward-folded section 221 between two adjacent main ribs 21, which is concave towards the direction close to the content space 23, and at least a part of the stirrup 22 forms an arched section 222 between two adjacent main ribs 21, which is arched towards the direction away from the content space 23. At each fixed connection position with the main reinforcement 21, the stirrup 22 is bent to form an arc section 223; meanwhile, between two adjacent main ribs 21, the stirrup 22 forms an inward-folded section 221 which is concave towards the direction close to the content space 23, between two adjacent main ribs 21, the stirrup 22 forms an arched section 222 which is arched towards the direction far away from the content space 23, the circular arc section 223 is in arc connection with the inward-folded section 221 or/and the arched section 222, and the stirrup 22 integrally forms a wave-shaped outer surrounding main rib array. The arrangement of the circular arc section 223, the inward-turned section 221 and the arched section 222 improves the strength of the rigid framework 2 and the concrete precast pile.

In the first to third embodiments, at least some technical implementations may be combined or replaced without departing from the spirit and scope of the present invention.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and embellishments made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a concrete precast pile, its characterized in that, includes pile body (10), pile body (10) tip has protection subassembly (1), pile body (10) inside has pre-buried in rigid frame (2) of concrete, rigid frame (2) include by many main muscle (21) interval arrangement and encircle main muscle battle array and the outer loop that forms content space (23) and wind stirrup (22) of main muscle battle array, protection subassembly (1) includes: the hoop (11), the net piece (12) connected to the hoop (11), and a plurality of reinforcing ribs (13) of which the end parts are connected with the net piece (12), wherein the other ends of the reinforcing ribs (13) are connected with the main ribs (21) or the stirrups (22).

2. The precast concrete pile according to claim 1, wherein one end of the reinforcing rib (13) connected with the mesh (12) is a first connecting point, one end of the reinforcing rib (13) connected with the main rib (21) or the hoop rib (22) is a second connecting point, and a connecting line between at least part of the first connecting point and the second connecting point of the reinforcing rib (13) forms an included angle α with the central axis of the pile body (10), wherein α is greater than or equal to 20 ° and less than or equal to 80 °;

and/or at least part of the reinforcing ribs (13) penetrate through the central axis of the content space (23);

and/or at least part of the reinforcing ribs (13) are connected with the mesh (12) at multiple points.

3. The precast concrete pile according to claim 1, wherein the hoop (11) comprises a corner protection sleeve (111) circumferentially surrounding the end of the pile body (10) and a corner protection plate (112) bent and extended from the front end of the corner protection sleeve (111) towards the central axis of the pile body (10), the front end of the corner protection sleeve (111) is flush with the top surface of the pile body (10), and the corner protection plate (112) covers at least a part of the top surface of the pile body (10).

4. A precast concrete pile according to claim 3, wherein the reinforcing ribs (13) are of an integral structure with the ribs of the mesh sheet (12); or the reinforcing ribs (13) are welded or clamped or hooped or bound or bonded with the mesh sheets (12), and the reinforcing ribs (13) are welded or clamped or bonded with the corner protection sleeves (111) or the corner protection plates (112);

and/or the reinforcing rib (13) is welded or hooped or bonded with the main rib (21) or the hoop rib (22);

and/or the corner protector sleeve (111) is a circumferentially closed annular body, the inner side of the corner protector sleeve (111) is provided with more than one annular groove or thread-shaped groove, and the rear end of the corner protector sleeve (111) is in an outward-expanding horn shape;

and/or the angle protection sleeve (111) and the angle protection plate (112) are integrally formed into the hoop (11) by welding, stamping or casting.

5. The concrete precast pile according to claim 3, wherein a plurality of connecting nuts (3) are connected to the corner protection plate (112), the plurality of connecting nuts (3) are annularly arranged on the corner protection plate (112) at equal intervals, the connecting nuts (3) are connected with the ends of the main ribs (21), and the circumferential edge of the connecting nut (3) is provided with more than one reinforcing rib (13);

the corner protecting plate (112) is provided with a mounting hole (4), and the inner cavity of the connecting nut (3) is communicated with the mounting hole (4); or a plurality of mounting holes (4) are annularly arranged on the corner protecting plate (112) at equal intervals, and the inner cavity of the connecting nut (3) is communicated with the corresponding mounting holes (4).

6. Concrete precast pile according to claim 5, characterized in that the connection nut (3) is connected with the reinforcement (13) on the outer circumferential side;

and/or the diameter of the mounting hole (4) is larger than or equal to the inner diameter of the connecting nut (3);

and/or the top surface of the connecting nut (3) is flush with the top surface of the mounting hole (4) or lower than the top surface of the mounting hole (4);

and/or the connecting nut (3) is fixed on the corner protection plate (112) in a welding, clamping or threaded connection mode.

7. The concrete precast pile according to claim 5, wherein the end of the connecting nut (3) is provided with a clamping boss (32), the connecting nut (3) is provided with a mounting groove (31) penetrating through the circumferential side wall on one side of the clamping boss (32), and the upset head (211) of the main rib (21) enters the connecting nut (3) through the mounting groove (31) and is in limited clamping connection with the clamping boss (32).

8. The concrete precast pile according to claim 7, wherein the connecting nut (3) is internally threaded or bonded with a sealing stopper (5), the sealing stopper (5) is located at the front end of the mounting groove (31), the sealing stopper (5) is provided with a mounting portion (51), and the mounting portion (51) is a screwing groove or a screwing protrusion.

9. Concrete precast pile according to claim 8 characterized in that the sealing stop (5) is a sealing stop.

10. The concrete precast pile according to any one of claims 1 to 9, wherein the stirrups (22) are wound around the main reinforcement array, at least a part of the stirrups (22) form an inward-folded section (221) between two adjacent main reinforcements (21) and concave toward the content space (23), and at least a part of the stirrups (22) form an arched section (222) between two adjacent main reinforcements (21) and arched away from the content space (23).

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