CN216422986U

CN216422986U - Precast pile

Info

Publication number: CN216422986U
Application number: CN202122496365.6U
Authority: CN
Inventors: 许顺良
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-29
Filing date: 2021-10-15
Publication date: 2022-05-03
Anticipated expiration: 2031-10-15
Also published as: CN113199626A

Abstract

The utility model relates to a precast pile, including pile body, the first axial rib body and the second axial rib body all set up in the pile body and extend along the axial direction of pile body, and the first axial rib body is prestretch the reinforcing bar with the second axial rib body, and the first axial rib body is different with the diameter of the second axial rib body, the utility model provides a pair of precast pile, the diameter is different and be prestretch the first axial rib body of reinforcing bar and the atress ability that the second axial rib body can increase precast pile, under the circumstances that guarantees precast pile safe and reliable atress intensity is high, can also reduce the weight of the rib body in the precast pile, save the technology cost.

Description

Precast pile

RELATED APPLICATIONS

The priority of the chinese patent application entitled "prestressed reinforcement tensioning method, prefabricated building structure and method of making same", filed on 29/4/2021, application No. 202110476474.3, is hereby incorporated by reference in its entirety.

Technical Field

The utility model relates to a prefabricated building field especially relates to a precast pile.

Background

In the field of building technology, in order to facilitate production and processing and reduce construction time, a precast pile is generally fabricated in a factory and then transported to a construction site for use. In a traditional precast pile, the internal reinforcing steel bars are usually the same, but the same reinforcing steel bars can cause the problems of increased material consumption of the reinforcing steel bars, increased cost, increased weight of the pile body and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a precast pile.

The utility model also provides a precast pile, including pile body, the first axial muscle body and the second axial muscle body, the first axial muscle body reaches the second axial muscle body all sets up in the pile body and follow the axial direction of pile body extends, the first axial muscle body with the second axial muscle body is prestretching the reinforcing bar, just the first axial muscle body with the diameter of the second axial muscle body is different.

In an embodiment of the present invention, the pile body is a solid pile, the first axial rib and the second axial rib together form a steel bar structure, and the steel bar structure is along the radial cross-sectional shape of the pile body is different from the radial cross-sectional shape of the pile body.

The utility model discloses an embodiment, the precast pile still includes radial muscle body, first axial muscle body second axial muscle body with radial muscle body forms the steel reinforcement cage jointly, first axial muscle body with second axial muscle body forms jointly the frame of steel reinforcement cage, radial muscle body spiral centers on the periphery of the frame of steel reinforcement cage.

In an embodiment of the present invention, the pile body is a solid pipe pile, and the reinforcement cage is a polygonal prism; alternatively, the first and second electrodes may be,

the pile body is a square pile, and the reinforcement cage is cylindrical or polygonal prism-shaped.

In an embodiment of the present invention, the first axial rib and the second axial rib are made of the same material.

The utility model discloses an embodiment, the steel reinforcement cage is polygonal prism shape, the diameter of first axial muscle body is greater than the diameter of second axial muscle body, first axial muscle body forms the axial edge of steel reinforcement cage, one or more the second axial muscle body is located two adjacent between the first axial muscle body.

In an embodiment of the present invention, the reinforcement cage is cylindrical, the first axial rib and the second axial rib are distributed in a staggered manner, and the first axial rib is disposed at an edge corresponding to the pile.

In an embodiment of the present invention, the radial rib body is fixed to the first axial rib body and the second axial rib body by spot welding.

In an embodiment of the present invention, the radial rib is disposed at the two ends of the reinforcement cage and the spiral of the middle portion is greater than the spiral of the middle portion.

In an embodiment of the present invention, the reinforcement cage is a plurality of, and a plurality of, the reinforcement cage is mutually sleeved.

The utility model provides a precast pile, the diameter is different and be the atress ability that the first axial muscle body that prestretches the reinforcing bar can increase the precast pile with the second axial muscle body, under the circumstances that guarantees precast pile safe and reliable atress intensity is high, can also reduce the weight of the muscle body in the precast pile, saves the technology cost.

Drawings

FIG. 1 is a schematic illustration of prestressed reinforcement tensioning in one embodiment;

FIG. 2 is a schematic view of the connection of the tensioning device and the reinforcing bars of FIG. 1;

FIG. 3 is a schematic view of another embodiment of the connection of the tensioning device to the rebar;

FIG. 4 is a schematic view of another embodiment of the connection of the tensioning device to the reinforcement bar;

FIG. 5 is a schematic cross-sectional view of a precast pile in one embodiment;

fig. 6 is a schematic cross-sectional view of a precast pile in another embodiment;

fig. 7 is a schematic cross-sectional view of a precast pile in another embodiment;

fig. 8 is a schematic structural view of a precast pile in another embodiment;

fig. 9 is a schematic structural view of a precast pile in another embodiment;

FIG. 10 is a schematic diagram of a quick docking assembly according to one embodiment;

FIG. 11 is a schematic structural view of the docking station of FIG. 10;

FIG. 12 is a schematic view of the base of FIG. 10;

FIG. 13 is a top view of the clasp of FIG. 12;

FIG. 14 is a cross-sectional view of the clasp of FIG. 12;

fig. 15 is a schematic view of two precast piles being connected to each other;

fig. 16 is a schematic view of another embodiment of the interconnection of two precast piles;

FIG. 17 is a schematic structural view of a precast pile and a pile cap;

fig. 18 is a partially enlarged view of a portion a shown in fig. 17.

100. Prefabricating a pile; 101. a pile body; 102. a first axial rib body; 103. a second axial rib; 32. a radial rib body; 311. heading; 60. a pile hoop; 61. a steel plate; 70. a connecting member; 71. a constriction; 200. a quick docking assembly; 210. inserting a platform; 211. a fixed part; 212. a plug-in part; 213. a first groove; 220. a base; 221. a first end face; 222. a second end face; 230. looping; 300. a tensioning device; 301. stretching a screw rod; 310. tensioning the screw; 320. stretching the plate; 330. a threaded connection; 331. a through hole; 340. a connecting rod; 350. an abutting member; 400. a bearing platform; 410. force transmission rib body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The precast pile refers to various pile bodies which are transported to a construction site for use after being prefabricated. The precast pile can be produced in a centralized way in a factory and can also be precast around a field. The axial length and the radial circumference of the precast pile can be manufactured as required, the reinforcement ratio can be designed according to the stress during carrying, hoisting and pressing the pile, and the flexibility is high. In addition, the precast pile belongs to a part of soil-squeezing piles, so that the cross-sectional area of the bearing platform is effectively saved, the manufacturing cost is saved, the stress release of soil bodies after the soil bodies are damaged is facilitated, the phenomena of pile body inclination and the like caused by soil body squeezing are reduced, and the construction of other nearby pile bodies is facilitated.

Referring to fig. 8 to 9, the present invention provides a precast pile 100 for a foundation building in the field of construction technology. In this embodiment, the precast pile 100 is used to prefabricate a vertically stressed pile. It is understood that in other embodiments, the precast pile 100 can also be applied to other engineering fields, such as fabricated buildings, etc., and can also be applied to horizontal load-bearing piles or composite load-bearing piles, etc.

The precast pile 100 comprises a pile body 101, wherein the pile body 101 is made of pouring concrete, and can be a solid pile (as shown in fig. 8 and 9) or a hollow pile or a partial hollow pile. The outer peripheral wall of the pile body 101 may be cylindrical or prismatic, and is not particularly limited thereto.

In the field of building technology, in order to facilitate production and processing and reduce construction time, a precast pile is generally fabricated in a factory and then transported to a construction site for use. In a traditional precast pile, the internal reinforcing steel bars are usually the same, but the same reinforcing steel bars easily cause the problems of increased material consumption of the reinforcing steel bars, increased cost, increased weight of the pile body and the like.

Based on this, the utility model provides a precast pile 100, including pile body 101, the first axial muscle body 102 and the second axial muscle body 103 all set up in pile body 101 and extend along the axial direction of pile body 101, and the first axial muscle body 102 is prestretching the reinforcing bar with the second axial muscle body 103, and the diameter of the first axial muscle body 102 and the second axial muscle body 103 is different.

Thus, the first axial rib body 102 and the second axial rib body 103 which have different diameters and are pre-stretched steel bars can increase the stress capacity of the precast pile 100, and the weight of the rib body in the precast pile 100 can be reduced under the condition that the precast pile 100 is safe and reliable and has high stress strength.

Further, referring to fig. 6 and 7, fig. 6 is a schematic cross-sectional view of a precast pile in another embodiment; fig. 7 is a schematic cross-sectional view of a precast pile in another embodiment. In this embodiment, pile body 101 is a solid pile, and first axial rib 102 and second axial rib 103 together form a steel bar structure (not numbered), and the shape of the steel bar structure in the radial cross section of pile body 101 is different from the shape of the radial cross section of pile body 101. It is understood that in other embodiments, the radial cross-sectional shape of the steel bar structure along the pile body 101 may be the same as the radial cross-sectional shape of the pile body 101, as shown in fig. 5.

So, steel bar structure's structural shape can cooperate pile body 101 to make precast pile 100 reach better bearing strength jointly, strengthens precast pile 100's security and reliability.

Preferably, in this embodiment, the precast pile further includes a radial reinforcement body 32, the first axial reinforcement body 102, the second axial reinforcement body 103 and the radial reinforcement body 32 together form a reinforcement cage, the first axial reinforcement body 102 and the second axial reinforcement body 103 together form a framework of the reinforcement cage, and the radial reinforcement body 32 spirally surrounds the periphery of the framework of the reinforcement cage.

Thus, the radial rib 32 spirally surrounds the reinforcement cage formed by the first axial rib 102 and the second axial rib 103, so that the stress capacity of the precast pile 100 in the axial direction and the radial direction can be increased, and the integral bearing capacity and reliability of the precast pile 100 can be further enhanced. It is understood that in other embodiments, the radial ribs 32 may surround the frame formed by the first axial ribs 102 and the second axial ribs 103 in other manners, as long as the radial ribs 32 can ensure the precast pile 100 to perform the reinforcement function.

Preferably, the pile body 101 is a solid pipe pile, and the reinforcement cage is polygonal prism-shaped; or the pile body 101 is a square pile, and the reinforcement cage is cylindrical or polygonal prism-shaped.

In this way, the cross-sectional shape of the pile body 101 can be made different from the cross-sectional shape of the reinforcement cage, which has an effect of enhancing the bearing capacity of the precast pile 100, and it is understood that in other embodiments, the pile body 101 of the precast pile 100 may be substantially cylindrical or polygonal (e.g., triangular, pentagonal, hexagonal, octagonal, etc.) cylindrical.

Preferably, the first axial rib 102 and the second axial rib 103 are made of the same material. Is convenient to manufacture and saves the process cost.

Preferably, the reinforcement cage is polygonal prism-shaped, the diameter of the first axial rib 102 is larger than that of the second axial rib 103, the first axial rib 102 forms an axial edge of the reinforcement cage, and one or more second axial ribs 103 are located between two adjacent first axial ribs 102.

Preferably, in the present embodiment, the reinforcement cage has a quadrangular prism shape, and each of the first axial rib 102 and the second axial rib 103 is four. It will be appreciated that in other embodiments the diameter of the second axial rib 103 may also be arranged larger than the diameter of the first axial rib 102.

In another embodiment of the present invention, the reinforcement cage is cylindrical, the first axial rib 102 and the second axial rib 103 are staggered, and the first axial rib 102 is disposed at the edge corresponding to the pile 101.

The diameter of first axial rib 102 is greater than the diameter of second axial rib 103, so that the arrangement of first axial rib 102 at the edge of pile 101 ensures the load-bearing capacity of precast pile 100.

Preferably, in the present embodiment, the radial rib 32 is fixed to the first axial rib 102 and the second axial rib 103 by spot welding. Spot welding can make the combination between the muscle body more firm, difficult separation, can understand, in other embodiments. The radial ribs 32 and the first and second

axial ribs

102 and 103 may be tied or otherwise fixed by steel wires.

Preferably, the number of helical turns of the radial rib 32 at the two ends of the reinforcement cage is greater than the number of helical turns in the middle. Therefore, the structure of the maximum stress position of the two ends of the precast pile 100 can be firmer, the bearing capacity of the two ends is enhanced, and the rib body is not easy to break.

Preferably, the reinforcement cage is a plurality of, and a plurality of reinforcement cages are established each other in the cover. Therefore, the firmness of the reinforcement cage can be further increased, and the bearing capacity of the precast pile 100 is ensured.

In conventional precast piles, the internal reinforcing bars are generally the same reinforcing bars in order to apply tension. When the steel bars in the precast pile are different steel bars, a secondary tensioning method is usually adopted, but the secondary tensioning method causes the processing flow of the precast pile to be more complicated, the construction time to be long and the yield to be influenced.

Based on this, the application also provides a prestressed reinforcement tensioning method, the prestressed reinforcement in the precast pile 100 comprises a first axial reinforcement body 102 and a second axial reinforcement body 103, and the maximum tensioning force which can be borne by the first axial reinforcement body 102 is different from that of the second axial reinforcement body 103;

the prestressed reinforcement tensioning method comprises the following steps:

s1, setting preset tension degrees of the first axial tendon 102 and the second axial tendon 103;

s2, calculating the lengths of the first axial rib 102 and the second axial rib 103 before being stretched according to the elongation of the first axial rib 102 and the second axial rib 103 and a preset tension degree;

and S3, tensioning the first axial rib body 102 and the second axial rib body 103 at one time, so that the first axial rib body 102 and the second axial rib body 103 reach a preset tensioning degree at the same time.

It should be noted that tensioning the first axial rib 102 and the second axial rib 103 at one time means that after the first axial rib 102 and the second axial rib 103 are respectively connected to the tensioning device, only one time of starting the tensioning device is needed to prestretch the first axial rib 102 and the second axial rib 103 at the same time.

In this embodiment, the first axial rib 102 and the second axial rib 103 are made of the same material, but have different diameters, so that the maximum tensile force that the first axial rib 102 can bear is different from that of the second axial rib 103. In the following description of the present invention, the following assumptions are made for convenience of explanation: the diameter of the first axial rib 102 is greater than the diameter of the second axial rib 103, and the length of the first axial rib 102 is less than the length of the second axial rib 103, which will not be described in detail later. It is understood that in other embodiments, the difference between the maximum tensile forces that the first axial rib 102 and the second axial rib 103 can bear may also be derived from different materials or other physical and chemical properties.

The utility model provides a prestressing steel stretch-draw method can once only stretch-draw two kinds of even multiple different muscle bodies, has saved the required time of stretch-draw reinforcing bar greatly, has simplified the stretch-draw flow simultaneously, is favorable to improving product output.

In the present embodiment, only two different tendon bodies are stretched at one time, and it is understood that in other embodiments, three or more different tendon bodies may be stretched at one time.

Further, in step S1, the preset tension degree of the first axial rib 102 is set to 60% to 80% of the maximum tension force that the first axial rib 102 can bear; and/or the presence of a catalyst in the reaction mixture,

the predetermined degree of tensioning of the second axial tendon 103 is set to 60% to 80% of the maximum tensioning force that the second axial tendon 103 can withstand.

The maximum tensile force that the first axial rib 102 and/or the second axial rib 103 can bear is the tensile force that the first axial rib 102 and/or the second axial rib 103 receive when the first axial rib 102 and/or the second axial rib 103 is broken by applying the tensile force. That is, when the first axial rib 102 and/or the second axial rib 103 is broken, the tensile force applied to the first axial rib 102 and/or the second axial rib 103 is 100%.

In one embodiment, as shown in fig. 1, the tensioning device 300 includes a tensioning machine (not shown), a tensioning screw 301, a tensioning plate 320 and a plurality of tensioning screws 310, the tensioning machine is fixedly connected to the tensioning screw 301, and the tensioning machine is capable of applying a tensioning force to the tensioning screw 301; the tensioning screw rod 301 is in threaded connection with the tensioning plate 320, and the tensioning screw rod 301 can drive the tensioning plate 320 to move; the tensioning plate 320 is provided with a plurality of threaded holes (not numbered), the plurality of threaded holes are used for being in threaded connection with the plurality of tensioning screws 310, and the tensioning plate 320 can drive the plurality of tensioning screws 310 to move; the tensioning screw 310 may be connected to the first axial tendon 102 or the second axial tendon 103 and may apply a tensioning force to the first axial tendon 102 or the second axial tendon 103. The diameter of the tension screw rod 301 is larger than that of the tension screw 310, and the cross-sectional area of the tension screw rod 301 may be the sum of the cross-sectional areas of all the tension screws 310 used for tensioning.

Preferably, the preset tension degree of the first axial rib body 102 is set to 70% of the maximum tension force that the first axial rib body 102 can bear; and/or the presence of a catalyst in the reaction mixture,

the preset degree of tensioning of the second axial tendon 103 is set to 70% of the maximum tensioning force that the second axial tendon 103 can withstand.

In one embodiment, the first axial rib 102 and the second axial rib 103 are of different lengths;

step S3 includes:

in step S31, the shorter one of the first axial tendon 102 and the second axial tendon 103 is stretched first, and the longer one is stretched later, so that the first axial tendon 102 and the second axial tendon 103 reach a preset stretching degree at the same time.

At the moment, the prestressed reinforcement tensioning method comprises the following steps:

s1, setting preset tensioning degrees of the first axial rib body 102 and the second axial rib body 103 respectively;

in step S31, the shorter one of the first axial tendon 102 and the second axial tendon 103 is tensioned, and the longer one is tensioned, so that the first axial tendon 102 and the second axial tendon 103 reach a preset tensioning degree at the same time.

Further, referring to fig. 1, step S31 includes:

step S311, the shorter one of the first axial rib 102 and the second axial rib 103 is connected to the tensioning device, then is in a linear shape, and is tensioned first, the longer one of the first axial rib 102 and the second axial rib 103 is connected to the tensioning device, then is in a curved shape, and as the tensioning is performed, the longer one is changed from the curved shape to the linear shape, and then is tensioned, so that the first axial rib 102 and the second axial rib 103 reach the preset tensioning degree at the same time.

s311, the shorter one of the first axial tendon 102 and the second axial tendon 103 is connected to a tensioning device, then is in a linear shape, and is tensioned first, the longer one of the first axial tendon 102 and the second axial tendon 103 is connected to the tensioning device, then is in a curved shape, and as the tensioning is performed, the longer one is changed from the curved shape to the linear shape, and then is tensioned, so that the first axial tendon 102 and the second axial tendon 103 reach a preset tensioning degree at the same time.

Referring to fig. 2, in detail, the ends of the first axial rib 102 and the second axial rib 103 are respectively provided with a connecting member 70; and the two connectors 70 are identical;

the first axial tendon 102 and the second axial tendon 103 are connected to the tensioning device by the connecting member 70.

With such an arrangement, the tensioning device can be in threaded connection with the connecting member 70 through the tensioning screw 310, so that the tensioning device can apply a tensile force to the first axial rib body 102 and/or the second axial rib body 103; the connecting member 70 can be conveniently matched with a tensioning device to tension the first axial reinforcement body 102 and the second axial reinforcement body 103, and after the precast pile is formed, the connecting member 70 is positioned at the end part of the pile body 101 and can also be used for butting two precast piles.

In one embodiment, the end of the connecting member 70 is further provided with a contraction opening 71, and the contraction opening 71 is used for connecting the first axial rib 102 and the second axial rib 103; the ends of the first axial rib 102 and the second axial rib 103 are provided with upsets 311, and the outer diameter of the upsets 311 is larger than the inner diameter of the contraction opening 71. The first axial bead 102 and the second axial bead 103 are inserted into the connecting member 70 and then abut against the contraction port 71 via the upset 311.

With this arrangement, the connecting element 70 can axially limit the upset 311 through the constricted opening 71, so that the first axial rib 102 and the second axial rib 103 are connected to the connecting element 70.

It is understood that in other embodiments, the connecting member 70 may have a through thread, the end of the first axial rib 102 and/or the second axial rib 103 may have an external thread matching the internal thread, and the first axial rib 102 and/or the second axial rib 103 may be fixedly connected to the connecting member 70 by the thread.

Referring to fig. 3 and 4, step S31 further includes:

in step S312, the shorter one of the first axial tendon 102 and the second axial tendon 103 is subjected to the tensioning force applied by the tensioning device and is tensioned, and the longer one of the first axial tendon 102 and the second axial tendon 103 is subjected to the tensioning force applied by the tensioning device and is tensioned, so that the first axial tendon 102 and the second axial tendon 103 reach the preset tensioning degree at the same time.

Further, referring to fig. 3 and 4, the ends of the first axial rib 102 and the second axial rib 103 are respectively provided with a connecting member 70 matching with the first axial rib 102 and the second axial rib 103;

the tensioning device 300 first contacts the connecting element 70 arranged in correspondence with the shorter of the first axial tendon 102 and the second axial tendon 103 and applies a tensioning force to it, and then contacts the connecting element 70 arranged in correspondence with the longer of the first axial tendon 102 and the second axial tendon 103 and applies a tensioning force to it.

It should be noted that, the "tension device 300 contacts the connecting element 70 correspondingly disposed on the first axial tendon 102/the second axial tendon 103" may directly contact the connecting element 70 and apply tension thereto, or may contact the connecting element 70 through an intermediate element (for example, the threaded connecting element 330 shown in fig. 4) and apply tension thereto.

Specifically, referring to fig. 3 again, the connecting element 70 in fig. 3 is a structure with a through thread inside, one end of the connecting element 70 is connected with the first axial tendon 102 or the second axial tendon 103 through a thread, at this time, the first axial tendon 102 and the second axial tendon 103 are preferably made of threaded steel, and the other end of the connecting element 70 is used for being connected with the through thread tendon 410 in the pile cap 400 after the precast pile 100 is formed, as shown in fig. 17 and 18.

In the embodiment shown in fig. 3, the tensioning device 300 includes the tensioning plate 320, and when in use, the tensioning plate 320 may be firstly sleeved on the plurality of first axial tendons 102 and the plurality of second axial tendons 103, and then the plurality of connecting members 70 are respectively connected with the first axial tendons 102 and the plurality of second axial tendons 103, and after the tensioning device is opened, the tensioning plate 320 moves along the N direction shown in fig. 3, abuts against the connecting members 70, and applies a tensioning force to the first axial tendons 102 and the plurality of second axial tendons 103 through the connecting members 70. If the diameter of the first axial tendon 102 is larger and can bear a larger maximum tensile force, the tension plate 320 contacts the connecting member 70 on the first axial tendon 102 and applies a force to the connecting member, and after the first axial tendon 102 is tensioned to be substantially the same as the total length of the second axial tendon 103, the tension plate 320 applies a tensile force to the first axial tendon 102 and the second axial tendon 103 at the same time, so that the first axial tendon 102 and the second axial tendon 103 can reach a preset tension degree at the same time.

In another embodiment, as shown in fig. 4, the tensioning device 300 may also tension the first axial tendon 102 and the second axial tendon 103 by means of a threaded connection 330 in cooperation with the connection 70. In this embodiment, the threaded connection 330 is screwed to the connection 70, and a movement space (not numbered) is formed between the threaded connection 330 and the first/second

axial ribs

102, 103 in the connection 70. The threaded connector 330 is provided with a through hole 331 therein, the tensioning device 300 comprises a connecting rod 340 and an abutting piece 350, the connecting rod 340 is arranged through the through hole 331 and can move in the through hole 331, the outer diameter of the abutting piece 350 is larger than the inner diameter of the through hole 331, and the distance (L3 in FIG. 5) between the threaded connector 330 and the abutting piece 350 corresponding to the first axial rib 102 is different from the distance (L2 in FIG. 5) between the threaded connector 330 and the abutting piece 350 corresponding to the second axial rib 103. When the tensioning device 300 is started, the abutting part 350 corresponding to the first axial tendon 102 abuts against the matched threaded connecting part 330 first, and a tensioning force is applied to the first axial tendon 102 first, and at this time, the distance of movement of the abutting part 350 corresponding to the second axial tendon 103 in the movement space is an idle stroke; as the length of the first axial tendon 102 is close to that of the second axial tendon 103, the abutting part 350 corresponding to the second axial tendon 103 abuts against the matched threaded connecting part 330 and stretches the second axial tendon 103 for a while, so that the effects of stretching the first axial tendon 102 with a short length first and stretching the second axial tendon 103 with a long length second are achieved.

It is to be understood that, when the length difference between the end of the first axial rib 102 and the end of the second axial rib 103 is denoted as L1, the difference between L2 and L3 should preferably be substantially the same as L1, that is, L1 is L2-L3. With the arrangement, when the first axial rib body 102 is stretched to the same length as the second axial rib body 103, the tensioning device 300 starts to apply tensioning force to the second axial rib body 103, so that the lengths of the first axial rib body 102 and the second axial rib body 103 after tensioning are substantially the same, and the preset tensioning degree can be achieved.

Preferably, the distance (L3) between the threaded connection 330 and the abutment 350 corresponding to the first axial rib 102 is greater than 0. So set up, when starting tensioning equipment 300, threaded connection 330 and butt 350 between have certain buffer distance, are favorable to protecting threaded connection 330, avoid threaded connection 330 to receive great instantaneous impact force, prolong threaded connection 330's life. It is to be understood that in other embodiments, L3 may be set to 0 if it is desired to tension the first axial tendon 102 more quickly, without limitation.

To facilitate the installation of the threaded connector 330, further, the peripheral wall of the end of the threaded connector 330 opposite to the abutment member 350 is provided with a polygonal shape, such as a regular hexagon or a regular octagon, so as to facilitate the installation of the mating power tool into the connector 70, thereby increasing the installation speed.

Preferably, before tensioning, the end of the threaded connection 330 corresponding to the first axial tendon 102 that is relatively far from the first axial tendon 102 is located on the same radial plane as the end of the threaded connection 330 corresponding to the second axial tendon 103 that is relatively far from the second axial tendon 103, in order to facilitate the setting of the tensioning plate 320. It should be noted that if it is desired that the two threaded connectors 330 are still located in the same radial plane after tensioning, the threaded connector 330 corresponding to the first axial rib 102 may be screwed on until the threaded connector 330 corresponding to the second axial rib 103 is located in the same radial plane.

The utility model also provides a precast pile manufacturing method, the precast pile comprises a pile body, a first axial rib body 102 and a second axial rib body 103 are arranged in the pile body, and the maximum tensile force which can be borne by the first axial rib body 102 is different from the second axial rib body 103;

the manufacturing method of the precast pile comprises the following steps:

a1, stretching the first axial reinforcement body 102 and the second axial reinforcement body 103 by the prestressed reinforcement tensioning method;

a2, pouring concrete into the mould;

a3, stretching the first axial rib 102 and the second axial rib 103 after the concrete is dried;

and A4, obtaining the precast pile.

The utility model provides a precast pile manufacturing method adopts above-mentioned prestressed reinforcement stretch-draw method for can have different muscle bodies in the precast pile, not only can satisfy different mechanical strength's demand, can also reduce the manufacturing cost of precast pile, make the muscle body in the precast pile can arrange the use according to the demand. In addition, the reinforcing steel bars in the precast pile are stretched in a pre-stretching mode and then are stretched, so that the bearing capacity of the reinforcing steel bars can be greatly improved, and the reinforcing steel bars are not easy to break; the reinforcing bar can produce the shrink of certain degree when putting to open for the combination between reinforcing bar and the concrete is inseparabler, especially twisted steel, can be more firm with the interlock between the concrete.

Referring to fig. 8 to 10 again, the present invention is not limited to the shape of the precast pile 100. Optionally, in one of the embodiments, the precast pile 100 is a square pile, that is, the outer shape of the pile body 101 is a cuboid, the precast pile 100 in the form of a square pile/a local solid pile is taken as an example for illustration, and for the precast piles 100 in other forms, the present invention is not described in detail.

It is understood that the outer edge of the cross section of the steel bar structure is circular or polygonal, and the polygonal is triangular, square/rectangular, pentagonal, hexagonal, etc., which are not listed here.

With the arrangement, the steel bar structures with different shapes can be designed according to the practical application and the corresponding stress condition of the precast pile 100, so as to achieve different force bearing effects.

In one embodiment of the present invention, the steel bar structure is made of prestressed steel bars.

According to the arrangement, the precast pile 100 is pre-stressed to form the prestressed steel bars before being used, when the precast pile 100 bears the tensile force generated by the external load, the pre-stress existing in the concrete is firstly counteracted, then the prestressed steel bars are stressed, and finally the concrete is tensioned and then cracks appear along with the increase of the load, so that the appearance and development of the cracks of the precast pile 100 are delayed, and the loads such as soil extrusion, underground water scouring, earthquake load and self-gravity load which can be borne by the precast pile 100 are improved. The deformed steel bar is a steel bar with a rib on the surface, and can better bear the action of external force due to the function of the rib and the larger bonding capacity of concrete. The steel bar structure is composed of prestressed steel bars, so that the pile body 101 has high vertical stress capacity, and an integral stress foundation is formed.

Preferably, the radial ribs 32 are fixed to the first axial rib 102 and the second axial rib 103 by spot welding.

Due to the arrangement, the strength of the reinforcing steel bar structure is high, the processing is simple, and the radial rib bodies 32 are wound on a frame formed by the first axial rib bodies 102 and the second axial rib bodies 103 only when the plurality of first axial rib bodies 102 and the plurality of second axial rib bodies 103 are axially transported, so that the working hours are saved; and can increase radial muscle body 32 spiral number of turns and the encryption length that surrounds at the great position of atress degree as required, increase radial muscle body 32 spiral number of turns and encryption length that surrounds at the both ends of steel bar structure (not numbered), prevent that precast pile 100 from suffering the structural damage too big bearing when burying underground.

Further, as shown in fig. 7, preferably, a second steel bar structure (not numbered) is further disposed in the pile body 101, the second steel bar structure is located inside the first steel bar structure, the second steel bar structure is similar to the first steel bar structure, and only the radial dimension of the steel bar structure or the steel reinforcement cage is changed. It is understood that, in other embodiments, the radial rib 32 and the first axial rib 102 and the second axial rib 103 may be fixed by snapping, binding, etc., which are not listed here.

So set up, the anti-seismic performance of precast pile 100 can be further strengthened to two steel bar structure that the size is different wear to establish in pile body 101, again can cooperate with the strain amplitude and the rate of change of meeting an emergency when the concrete of restraint pile body 101 is bent or is drawn, prevent the appearance and the diffusion of crackle.

In one embodiment, the first axial rib body 102 and/or the second axial rib body 103 are made of at least one of a steel bar for prestressed concrete (PC steel bar), a stainless steel bar, a hot rolled steel bar, a medium strength prestressed steel wire, a stress-relieving steel wire, a steel strand, a prestressed twisted steel bar, and/or,

the radial rib 32 is made of at least one of a steel bar for prestressed concrete (PC steel bar), a stainless steel bar, a hot rolled steel bar, a medium strength prestressed wire, a stress-relieving wire, a steel strand, a prestressed twisted steel, a low carbon steel hot rolled disk strip, and a cold drawn low carbon steel wire for concrete products.

Preferably, the solid pile body 101 is made of a concrete material.

In one embodiment, the precast pile 100 further comprises a pile hoop 60, and the pile hoop 60 is disposed on the outer peripheral wall of the end of the pile body 101, so as to prevent the concrete at the end of the precast pile 100 from falling off when the precast pile 100 is buried underground or in service, and further prevent the steel bars from being exposed to corrosion. The pile hoop 60 can wrap the end part of the pile body 101, so that the surface of the pile body 101 is smoother and tidier, and the concrete at the end part of the pile body 101 can be protected; in addition, the pile body 101 can be vibrated more sufficiently when concrete is filled, and the breakage rate of the pile body 101 is reduced, so that the prepared precast pile 100 has higher strength and better quality.

Pile cuff 60 is carbon structural steel, preferably Q235 steel; the thickness of the pile hoop 60 is 0.5mm to 12mm, and the height of the pile hoop 60 along the axial direction of the precast pile 100 is 60mm to 500 mm. Preferably, the thickness of the pile hoop 60 is 1mm to 8mm, and the height of the pile hoop 60 along the axial direction of the precast pile 100 is 80mm to 200 mm.

In one embodiment, the first axial rib 102 and/or the second axial rib 103 is provided with a connecting member 70, and the connecting member 70 is located at the end of the pile body 101. So configured, in the construction of a building, the precast pile 100 is generally required to be spliced with another precast pile 100 to extend the length of the precast pile 100, or a cap is poured after reinforcing bars are attached to the top of the precast pile 100 to bear the superstructure. The connecting piece 70 is arranged on the first axial rib body 102 and/or the second axial rib body 103, so that the combination rate between the two precast piles 100 can be increased, or the reinforcement rate of the bearing platform can be improved, the connection mode between the precast pile 100 and the bearing platform is simplified, and the integral vertical stress capacity of the precast pile 100 is improved.

In one embodiment, the connecting member 70 has an internal thread, the end of the first axial rib 102 and/or the second axial rib 103 is provided with an external thread adapted to the internal thread, and the first axial rib 102 and/or the second axial rib 103 is fixedly connected to the connecting member 70 by the thread.

In one embodiment, the end of the connecting member 70 is further provided with a contraction opening 71, and the contraction opening 71 is used for connecting with the first axial rib 102 and/or the second axial rib 103; an upset 311 is arranged at the end of the first axial rib 102 and/or the second axial rib 103, and the outer diameter of the upset 311 is larger than the inner diameter of the contraction opening 71. The first axial rib 102 and/or the second axial rib 103 is inserted into the connecting member 70 and then abuts against the contraction port 71 through the upset 311.

With this arrangement, the connecting element 70 can axially limit the upset 311 via the constriction 71, so that the first axial rib 102 and/or the second axial rib 103 remain connected to the connecting element 70.

It should be noted that, when two precast piles 100 are spliced, the types of the connecting members 70 in the two precast piles 100 may be the same or different, and may be selected according to actual construction conditions.

Referring to fig. 10 to 14, the two precast piles 100 are connected by the quick butt joint assembly 200, so that the butt joint speed is high and the mechanical strength is high after the butt joint.

The quick docking assembly 200 comprises a socket 210, a base 220 and a buckle 230, wherein the socket 210 comprises a fixing portion 211 and a plugging portion 212 which are oppositely arranged, and the plugging portion 212 is provided with a first groove 213; the base 220 includes a first end surface 221 and a second end surface 222 disposed opposite to each other; the ring buckle 230 is C-shaped (i.e. has an opening) and can be elastically contracted, and the ring buckle 230 is sleeved on the inserting platform 210 and is accommodated in the first groove 213; the ring 230 can be inserted into the base 220 along the insertion direction (the α direction shown in fig. 10) together with the plug 212 of the socket 210, and the ring 230 can abut against the second end surface 222 of the base 220 by elastic expansion and limit the movement of the socket 210 along the opposite direction of the insertion direction.

After the insertion portion 212 of the socket 210 is inserted into the base 220, the ring buckle 230 can be ejected out of the first groove 213 through the elastic expansion portion and abut against the second end face 222 of the base 220, an abutting surface between the ring buckle 230 and the second end face 222 is approximately annular, an abutting area is large, the joint strength between the two connecting members 70 can be ensured, and particularly, the vertical stress performance is greatly improved. In addition, the rapid docking assembly 200 provided by the embodiment has the advantages of simple processing technology, low cost and wide application range.

It is understood that the insertion direction α can be, but is not limited to, the above-mentioned directions, and even partial angular offsets should be included in the scope of the present invention.

The quick docking assembly 200 is only an example, and two precast piles 100 may be connected by other types of quick docking assemblies 200, which are not listed here.

Referring to fig. 15 and 16, fig. 15 is a schematic view illustrating two precast piles being connected to each other; fig. 16 is a schematic view of another embodiment of the interconnection of two precast piles.

In one embodiment, two pre-fabricated piles 100 are butt-jointed and then welded and fixed by a pile ferrule 60, as shown in fig. 14. The pile hoops 60 of the two precast piles 100 are directly welded and fixed by utilizing the metal performance of the pile hoops 60, so that the connection strength of the two precast piles 100 is increased, the two precast piles 100 are connected by the quick butt joint assembly 200 and connected by welding the pile hoops 60, and the stability is better.

In another embodiment, two precast piles 100 are butt-jointed and then welded and fixed with the pile ferrule 60 through the steel plate 61, as shown in fig. 14. So set up, can reduce the welding degree of difficulty, increase the joint strength between two precast piles 100 after the welding.

Specifically, for example, when the pile body 101 is a square pile, the steel plate 61 is preferably an angle steel; when the pile body 101 is a tubular pile, the steel plate 61 is semicircular or circular arc.

Referring to fig. 17, fig. 17 is a schematic structural diagram of a precast pile 100 and a platform 400.

In one embodiment, precast pile 100 is mated with a cap 400.

In this embodiment, the precast pile 100 is connected with a cap 400. The end parts of the first axial rib body and the second axial rib body are respectively provided with a connecting piece 70, the connecting pieces 70 are fixedly connected with the force transmission rib bodies 410, a plurality of force transmission rib bodies 410 form a stress frame in the bearing platform 400, then concrete is poured into a mould, and the bearing platform 400 is formed after the concrete is dried and formed. In the embodiment, the first axial rib body or the second axial rib body is provided with the connecting piece 70, so that the reinforcement ratio in the bearing platform 400 can be greatly improved, the bearing capacity of the bearing platform 400 can be improved, the force transmission link is reduced, and the bearing platform is safer and more reliable; but also better transfer the forces borne by the cap 400 to the underlying foundation.

It will be appreciated that in other embodiments, if the platform 400 does not need to have a very high load-bearing capacity, only the first or second axial rib may have a connector 70 at its end, the connector 70 being fixedly connected to the force-transmitting rib 410.

Referring to fig. 18, fig. 18 is a partially enlarged view of a portion a shown in fig. 17.

In one embodiment, the connecting member 70 is provided with a through thread, and one end of the connecting member 70 is in threaded connection with the first axial rib 102 or the second axial rib 103, and the other end is in threaded connection with the force transmission rib 410.

Preferably, the force transmitting rib body 410 is a threaded steel.

It is understood that in other embodiments, the connecting member 70 may be other types of steel bars, and the connecting member 70 may be fixedly connected to the first axial rib 102, the second axial rib 103, or the force transmission rib 410 by welding, clamping, or the like. Preferably, the connecting member 70 is provided with an internal thread, and the force transmission rib body 410 is provided with an external thread, and the two are connected in a thread fit manner, so that the connection is simple and convenient, and the time cost during construction is saved.

By adopting the prestressed reinforcement tensioning method, two or even more different reinforcement bodies can be tensioned at one time, the time for tensioning the reinforcement is greatly saved, the tensioning flow is simplified, and the product yield is improved.

In addition, the prestressed reinforcement tensioning method can also enable the precast pile 100 to have different reinforcement bodies, so that the requirements for different mechanical strengths can be met, the production cost of the precast pile can be reduced, and the reinforcement bodies in the precast pile can be matched according to requirements.

The utility model provides a precast pile 100, the diameter is different and be the first axial muscle body 102 and the second axial muscle body 103 that prestretch the reinforcing bar can increase precast pile 100's atress ability, under the circumstances that guarantees precast pile 100 safe and reliable atress intensity is high, can also reduce the weight of the muscle body in precast pile 100, saves the technology cost.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The precast pile is characterized by comprising a pile body (101), a first axial rib body (102) and a second axial rib body (103), wherein the first axial rib body (102) and the second axial rib body (103) are both arranged in the pile body (101) and extend along the axial direction of the pile body (101), the first axial rib body (102) and the second axial rib body (103) are both pre-stretched steel bars, and the diameters of the first axial rib body (102) and the second axial rib body (103) are different.

2. A precast pile according to claim 1, characterized in that the pile body (101) is a solid pile, and the first axial tendon (102) and the second axial tendon (103) together form a rebar structure having a radial cross-sectional shape along the pile body (101) different from the radial cross-sectional shape of the pile body (101).

3. The precast pile of claim 2, characterized in that it further comprises a radial rib body (32), wherein the first axial rib body (102), the second axial rib body (103) and the radial rib body (32) together form a reinforcement cage, wherein the first axial rib body (102) and the second axial rib body (103) together form a framework of the reinforcement cage, and wherein the radial rib body (32) is screwed around the periphery of the framework of the reinforcement cage.

4. The precast pile according to claim 3, wherein the pile body (101) is a solid tubular pile, and the reinforcement cage is a polygonal prism; alternatively, the first and second electrodes may be,

the pile body (101) is a square pile, and the reinforcement cage is cylindrical or polygonal prism-shaped.

5. A precast pile according to claim 4, characterized in that the first axial tendons (102) and the second axial tendons (103) are of the same material.

6. A precast pile according to claim 5, characterized in that the reinforcement cage is polygonal prism-shaped, the diameter of the first axial tendons (102) is larger than the diameter of the second axial tendons (103), the first axial tendons (102) form the axial edges of the reinforcement cage, and one or more second axial tendons (103) are located between two adjacent first axial tendons (102).

7. A precast pile according to claim 5, characterized in that the reinforcement cage is cylindrical, the first axial tendons (102) and the second axial tendons (103) are staggered, and the first axial tendons (102) are arranged at the edges corresponding to the pile body (101).

8. A precast pile according to claim 3, characterized in that the radial ribs (32) are spot welded to the first axial rib (102) and the second axial rib (103).

9. A precast pile according to claim 3, characterized in that the number of helical turns of the radial tendons (32) at the ends of the cage is greater than the number of helical turns in the middle.

10. A precast pile according to any one of claims 3 to 9, wherein there are a plurality of reinforcement cages, and a plurality of reinforcement cages are nested with each other.