CN212452598U - Prefabricated building structure - Google Patents

Abstract

The utility model provides a prefabricated building structure, which comprises a pile body, a pile tip, a pre-embedded connecting piece and a detachable connecting piece, wherein the pile body is detachably connected with the pile tip; the embedded connecting piece is arranged at the end part of the pile body, a first through hole is formed in the pile tip, the first through hole is aligned with the embedded connecting piece, and the detachable connecting piece can be connected with the embedded connecting piece through the first through hole; the pile body comprises a hollow part and a solid part which are connected with each other, and the hollow part is hollow and surrounds to form a core groove. The pile tip enables the penetration capacity of the soil layer of the prefabricated building structure during sinking construction to be increased, the guiding effect can be achieved, and the probability of breakage of the prefabricated building structure can be reduced. In addition, the pile point is detachable and more flexible, and the requirements of different working conditions can be met.

Description

Prefabricated building structure

Technical Field

The utility model relates to a building technical field especially relates to a prefabricated building structure.

Background

In the field of building technology, in order to facilitate production and processing and reduce construction time, a prefabricated building structure is generally manufactured in a factory and then transported to a construction site for use. Most of the existing prefabricated building structures are solid structures or hollow structures, but the solid structures have the problems of overlarge weight, difficulty in transportation, waste of raw materials and the like; on the other hand, although the hollow structure can save raw materials, the shock resistance mechanical property and durability of the hollow structure cannot be guaranteed. Therefore, there is a need for an improved prefabricated building structure that can not only reduce weight and save raw materials, but also ensure its seismic mechanical properties and durability.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an improved prefabricated building structure.

The utility model provides a prefabricated building structure, which comprises a pile body, a pile tip, a pre-embedded connecting piece and a detachable connecting piece, wherein the pile body is detachably connected with the pile tip; the embedded connecting piece is arranged at the end part of the pile body, a first through hole is formed in the pile tip, the first through hole is aligned with the embedded connecting piece, and the detachable connecting piece can be connected with the embedded connecting piece through the first through hole; the pile body comprises a hollow part and a solid part which are connected with each other, and the hollow part is hollow and surrounds to form a core groove.

The pile body in the prefabricated building structure provided by the utility model comprises the hollow part and the solid part, thereby not only reducing the consumption of raw materials, reducing the weight and saving the manufacturing cost; when the prefabricated building structure is buried underground, the central part is located in a depth area with the highest earthquake wave frequency below the foundation, so that the earthquake resistance of the prefabricated building structure can be ensured, and the reliability of the prefabricated building structure in service is ensured. In addition, when the core slot is used with the opening facing downwards, the prefabricated building structure exerts pressure on the solid part when being buried underground, the phenomenon that the prefabricated building structure is damaged due to overlarge pressure intensity can be avoided, and the core slot can be matched with external components such as a pile tip and the like to seal the core slot so as to prevent underground water from entering. When the core slot is used with the opening facing upwards, the solid part can prevent underground water from entering the interior of the prefabricated building structure, effectively resists the corrosion of the underground water to the interior of the prefabricated building structure, and ensures the durability of the prefabricated building structure without core filling treatment. The pile tip enables the penetration capacity of the soil layer of the prefabricated building structure during sinking construction to be increased, the guiding effect can be achieved, and the probability of breakage of the prefabricated building structure can be reduced. In addition, the pile point is detachable and more flexible, and the requirements of different working conditions can be met.

The utility model discloses an in an embodiment, pre-buried connecting piece is equipped with the internal thread, it is equipped with the external screw thread to dismantle the connecting piece, pre-buried connecting piece with it passes through threaded connection to dismantle the connecting piece.

So set up, pre-buried connecting piece and dismantle between the connecting piece and be connected simply, the processing cost is low, and the fastness is good after connecting, can arrange outside electric tool in pairs and use, saves the engineering time.

In one embodiment of the present invention, the prefabricated building structure further comprises a first cage, the first cage is disposed inside the pile and is made of prestressed reinforcement; the first cage body comprises a plurality of first axial rib bodies, and the first axial rib bodies are arranged along the axial direction of the pile body; the embedded connecting piece is connected with the end part of the first axial rib body.

So set up, the tensioning machine can be connected with first axial muscle body to exert prestressing force to first axial muscle body, improve prefabricated building structure's bearing capacity. The tensioning machine and the first axial rib body are connected simply and conveniently, so that the construction time can be shortened, and the construction cost can be reduced.

The utility model discloses an in the embodiment, pre-buried connecting piece has the shrink mouth, first axial muscle body is close to relatively pre-buried connecting piece's tip has the upset head, the shrink mouth be used for right the upset head is spacing.

By the arrangement, the connection between the embedded connecting piece and the first axial rib body is simple, the heading forming is fast, and the operation of workers is convenient; and the tensile strength is high after connection.

The utility model discloses an in one embodiment, pre-buried connecting piece has the internal thread, the first axial muscle body has the external screw thread, pre-buried connecting piece with through threaded connection between the first axial muscle body.

By the arrangement, the processing mode is simple, and the cost is low; and the construction method is simple and convenient, and is convenient for workers to operate.

In an embodiment of the present invention, the pile body is a square pile, and the pile tip is a quadrangular pyramid.

By the arrangement, the square pile has a large outer surface area and is square or polygonal, and the repose angle between the pile body and the soil in the soil layer is much larger than that of a round outer surface, so that the hollow square pile can obtain larger bearing capacity than a tubular pile under the same geological conditions, and a large amount of basic funds are saved for engineering; by contrast, the bearing capacity of the square pile is larger, and the manufacturing cost of the bearing capacity per kilo-newton (KN) is lower than that of the prestressed concrete pipe pile, so that a designer can prefer the square pile under the same design bearing capacity, and the fund is saved; the theoretically calculated shearing resistance of the square pile is 2-3 times of that of the equivalent tubular pile, which shows that the square pile has excellent seismic performance and is suitable for building foundations of areas with multiple earthquakes, high-rise buildings and large-area basements; the local hollow square pile inherits and develops the characteristic of low construction breakage rate of the original concrete square pile, and the high-strength concrete is matched with the square head, so that the high-strength concrete has better impact resistance and much lower pile head breakage rate than the tubular pile.

In one embodiment of the present invention, the reinforcing rib includes a reinforcing portion and a relief portion connected to each other, the reinforcing portion is a quadrangular pyramid, and an edge of the reinforcing portion corresponds to an edge of the pile toe; the yielding part is used for yielding the first through hole.

By the arrangement, the reinforcing part corresponds to the pile tip in shape, so that the pile tip can be prevented from being damaged in the pile sinking process, and the bearing capacity of the pile tip is improved; let position portion can let position first through-hole, and the strengthening rib is rationally distributed.

In an embodiment of the present invention, the pile tip includes a metal tip, and the metal tip is disposed at an end of the pile body opposite to the pile tip.

So set up, the tip of stake point is the metal material rather than the concrete material, can enough improve the efficiency when prefabricated building structure squeezes into the soil body, can prevent again that the concrete of stake point department from droing, arouses prefabricated building structure's intensity decline.

In one embodiment of the present invention, the first through hole has a filling stopper therein, and the filling stopper is used for filling and sealing the first through hole.

So set up, can prevent that prefabricated building structure is in the in-service process, during groundwater or other underground impurity got into the pile body from first through-hole, prevented that first cage from being corroded, prolonged prefabricated building structure's life.

In an embodiment of the present invention, the reinforcing rib is made of at least one of deformed steel bar, steel bar for prestressed concrete, stainless steel bar, hot rolled steel bar, medium strength prestressed steel wire, stress-relief steel wire, steel strand, prestressed twisted steel bar, low carbon steel hot rolled disc strip, and cold drawn low carbon steel wire for concrete product.

So set up, the intensity of strengthening rib is high, difficult fracture to low price is simple easily to get.

In an embodiment of the present invention, the number of the first through holes is 4 to 20.

So set up, can enough guarantee the joint strength of stake point and pile body, can avoid the excessive bearing capacity of stake point loss again.

In an embodiment of the present invention, the pile body is a tubular pile, and the pile tip is a cone.

By the arrangement, the pipe pile is wide in application range, mature in manufacturing process and low in manufacturing cost.

Drawings

Fig. 1 is a schematic view of a prefabricated building structure according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the prefabricated building structure of FIG. 1 taken along section A-A;

FIG. 3 is a cross-sectional view of the prefabricated building structure of FIG. 1 taken at section B-B;

FIG. 4 is a schematic view of the construction of the pile tip of the prefabricated building structure of FIG. 1;

FIG. 5 is a schematic view of a pile tip according to a second embodiment of the present invention;

fig. 6 is a schematic view of a pile tip according to a third embodiment of the present invention;

FIG. 7 is a schematic view of the use of the pre-buried connector shown in FIG. 1;

FIG. 8 is a schematic view of the use of two prefabricated building structures in abutting joint;

FIG. 9 is a schematic structural diagram of a quick docking assembly in one embodiment;

FIG. 10 is a schematic structural view of a quick docking assembly according to another embodiment;

FIG. 11 is a schematic view of a prefabricated building structure and a platform;

fig. 12 is a partially enlarged view of the portion C shown in fig. 11.

Description of the main elements

100. Prefabricating a building structure; 101. a pile body; 102. pile tip; 1020. reinforcing ribs; 1021. a reinforcing portion; 1022. a relief portion; 1023. a first through hole; 1024. a metal tip; 1025. a metal bracket; 10. a hollow portion; 20. a solid portion; 30. a first cage; 40. a second cage; 11. a core groove; 50. mounting a plate; 31. a first axial rib body; 32. a first radial rib; 41. a second axial rib; 42. a second radial rib body; 60. a corner protecting sleeve; 70. pre-burying a connecting piece; 311. heading; 71. a constriction; 72. an annular projection; 80. disassembling the connecting piece; 200. a quick docking assembly; 210. a first insert table; 211. a first fixed part; 212. a first insertion part; 213. a first extension portion; 214. a first step surface; 220. a first base; 221. a second fixed part; 222. a fin; 230. a second insert table; 231. a third fixed part; 232. a second insertion part; 233. a first groove; 240. a second base; 241. a first end face; 242. a second end face; 250. looping; 300. a pile hoop; 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 belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on 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 in the description of the invention herein 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 prefabricated building structure 100 refers to various pile bodies which are transported to a construction site for use after being prefabricated. The prefabricated building structure 100 may be produced centrally in a factory or prefabricated around a site. The axial length and the radial circumference of the prefabricated building structure 100 can be made as required, and the reinforcement ratio can be designed according to the stress during the transportation, hoisting and pressing of the pile, so that the flexibility is high. In addition, the prefabricated building structure 100 belongs to a part of soil-squeezing piles, so that the cross-sectional area of a 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.

Fig. 1 is a schematic view of a prefabricated building structure according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view of the prefabricated building structure of FIG. 1 taken along section A-A; fig. 3 is a cross-sectional view of the prefabricated building structure shown in fig. 1, taken along section B-B.

The utility model provides a prefabricated building structure 100 is applied to the foundation building among the building technology field. In this embodiment, the prefabricated building structure 100 is used to prefabricate a vertically stressed pile. It is understood that in other embodiments, the prefabricated building structure 100 may also be used in other engineering fields, such as fabricated buildings, etc., and may also be used for horizontal load-bearing piles or composite load-bearing piles, etc.

Most of the existing prefabricated building structures are solid structures or hollow structures, but the solid structures have the problems of overlarge weight, difficulty in transportation, waste of raw materials and the like; on the other hand, although the hollow structure can save raw materials, the shock resistance mechanical property and durability of the hollow structure cannot be guaranteed.

The utility model provides a prefabricated building structure 100, which comprises a pile body 101, a pile tip 102, a pre-embedded connecting piece 70 and a detachable connecting piece 80, wherein the pile body 101 and the pile tip 102 are detachably connected; the embedded connecting piece 70 is arranged at the end part of the pile body 101, the pile tip 102 is provided with a first through hole 1023, the first through hole 1023 is aligned with the embedded connecting piece 70, and the detachable connecting piece 80 can be connected with the embedded connecting piece 70 through the first through hole 1023; the pile body 101 includes a hollow portion 10 and a solid portion 20 connected to each other, and the hollow portion 10 is hollow and surrounds a core hole 11.

The pile body 101 in the prefabricated building structure 100 provided by the utility model comprises the hollow part 10 and the solid part 20, which not only reduces the consumption of raw materials, lightens the weight and saves the manufacturing cost; when the prefabricated building structure 100 is buried underground, the central unit 20 is located in a depth region where seismic waves having the highest frequency of occurrence below a foundation are located, so that the seismic capacity of the prefabricated building structure 100 can be ensured, and the reliability of the prefabricated building structure 100 in service is ensured. In addition, when the core slot 11 is used with the opening facing downward, the prefabricated building structure 100 applies pressure to the solid portion 20 when being buried under the ground, so that the phenomenon that the prefabricated building structure 100 is damaged due to excessive pressure can be avoided, and the core slot 11 can be matched with external members such as a pile tip to seal the core slot 11 to prevent the ground water from entering. When the core hole 11 is used with its opening facing upward, the solid portion 20 prevents groundwater from entering the interior of the prefabricated construction structure 100, effectively resists the groundwater from corroding the interior of the prefabricated construction structure 100, and ensures the durability of the prefabricated construction structure 100 without a core filling process. The pile tip 102 increases the penetration of the soil layer during the sinking construction of the prefabricated building structure 100, can play a guiding role, and can also reduce the probability of the prefabricated building structure 100 breaking. In addition, the pile tip 102 is detachable and more flexible, and can meet the requirements of different working conditions.

Preferably, the hollow portion 10 and the solid portion 20 are made of a concrete material, and the outer peripheral walls of the hollow portion 10 and the solid portion 20 are substantially the same shape.

It is understood that the stub tip 102 may be located at an end of the stub body 101 relatively close to the hollow portion 10, or at an end relatively close to the solid portion 20.

The utility model discloses an in an embodiment, pre-buried connecting piece 70 is equipped with the internal thread, and it is equipped with the external screw thread to dismantle connecting piece 80, and pre-buried connecting piece 70 passes through threaded connection with dismantling connecting piece 80.

So set up, it is simple to be connected between pre-buried connecting piece 70 and the dismantlement connecting piece 80, and the processing cost is low, and the fastness is good after connecting, can arrange outside electric tool to use, saves the engineering time.

It is understood that, in other embodiments, the pre-embedded connection member 70 and the detachable connection member 80 may be connected by other methods such as welding, which is not limited herein.

Preferably, the release coupling 80 is a bolt.

In an embodiment of the present invention, the embedded connector 70 has a contraction opening 71, the end of the first axial rib 31 relatively close to the embedded connector 70 has an upset 311, and the contraction opening 71 is used for limiting the upset 311.

By the arrangement, the connection between the embedded connecting piece 70 and the first axial rib body 31 is simple, and the forming of the upset head 311 is fast, so that the operation of workers is convenient; and the tensile strength is high after connection.

In an embodiment of the present invention, the pre-embedded connection member 70 has an internal thread, the first axial rib 31 has an external thread, and the pre-embedded connection member 70 is connected to the first axial rib 31 through a thread.

By the arrangement, the processing mode is simple, and the cost is low; and the construction method is simple and convenient, and is convenient for workers to operate.

In one embodiment of the present invention, the reinforcing rib 1020 includes a reinforcing portion 1021 and a receding portion 1022 which are connected to each other, the reinforcing portion 1021 is a quadrangular pyramid shape, and an edge of the reinforcing portion 1021 corresponds to an edge of the pile toe 102; the yielding portion 1022 is used for yielding the first through hole 1023.

With the arrangement, the reinforcing part 1021 corresponds to the shape of the pile tip 102, so that the pile tip 102 can be prevented from being damaged in the pile sinking process, and the bearing capacity of the pile tip 102 is improved; the yielding part 1022 can yield the first through hole 1023, and the reinforcing ribs 1020 are reasonable in layout.

In one embodiment of the present invention, the first through hole 1023 has a filling plug therein for filling and sealing the first through hole 1023.

So set up, can prevent that prefabricated building structure 100 is in the in-service process, during groundwater or other underground impurity get into pile 101 from first through-hole 1023, prevented that first cage 30 from being corroded, prolonged prefabricated building structure 100's life.

Specifically, the filling plugging material is cement mixture, epoxy resin, structural adhesive and the like, and the filling plugging material can be sealed in an anticorrosion way.

In an embodiment of the present invention, the reinforcing rib 1020 is made of at least one of deformed steel bar, steel bar for prestressed concrete, stainless steel bar, hot rolled steel bar, medium strength prestressed steel wire, stress relief steel wire, steel strand, prestressed twisted steel bar, low carbon steel hot rolled disc strip, and cold drawn low carbon steel wire for concrete product.

So set up, strengthening rib 1020's intensity is high, difficult fracture to low price is simple easily obtained.

In an embodiment of the present invention, the number of the first through holes 1023 is 4 to 12.

By the arrangement, the connection strength of the pile tip 102 and the pile body 101 can be ensured, and the pile tip 102 can be prevented from losing too much bearing capacity.

Referring to fig. 1 again, in order to facilitate the positioning between the stake tip 102 and the stake body 101, a protrusion is disposed on the stake tip 102, and can be fixed after being inserted into the core groove 11; or, the end of the solid part 20 in the pile body 101 is provided with a groove, and the protrusion on the pile tip 102 is inserted into the groove at the end of the solid part 20 and then fixed.

It is understood that in other embodiments, the end of the solid portion 20 of the pile body 101 may be provided with a protrusion, and the tip may be provided with a groove, so as to enable quick butt-fixing between the pile body 101 and the tip 102.

Referring to fig. 4, fig. 4 is a schematic view illustrating the structure of the pile tip of the prefabricated building structure shown in fig. 1.

In one embodiment of the present invention, the pile body 101 is a square pile, and the pile tip 102 is a quadrangular pyramid.

By the arrangement, the square pile has a large outer surface area and is square or polygonal, and the repose angle between the pile body 101 and soil in a soil layer is much larger than that of a round outer surface, so that the hollow square pile can obtain larger bearing capacity than a tubular pile under the same geological conditions, and a large amount of basic funds are saved for engineering; by contrast, the bearing capacity of the square pile is larger, and the manufacturing cost of the bearing capacity per kilo-newton (KN) is lower than that of the prestressed concrete pipe pile, so that a designer can prefer the square pile under the same design bearing capacity, and the fund is saved; the theoretically calculated shearing resistance of the square pile is 2-3 times of that of the equivalent tubular pile, which shows that the square pile has excellent seismic performance and is suitable for building foundations of areas with multiple earthquakes, high-rise buildings and large-area basements; the local hollow square pile inherits and develops the characteristic of low construction breakage rate of the original concrete square pile, and the high-strength concrete is matched with the square head, so that the high-strength concrete has better impact resistance and much lower pile head breakage rate than the tubular pile.

In another embodiment of the present invention, the pile body 101 is a tubular pile, and the pile tip 102 is a cone.

By the arrangement, the pipe pile is wide in application range, mature in manufacturing process and low in manufacturing cost.

In one embodiment, the prefabricated building structure 100 is a partially hollow square pile. At this time, the prefabricated building structure 100 is substantially rectangular parallelepiped, the hollow portion 10 and the solid portion 20 are also substantially rectangular parallelepiped and made of concrete, and a core groove 11 having a cylindrical peripheral wall is opened in the middle of the hollow portion 10; the second cage 40 and the first cage 30 are both substantially rectangular, the second cage 40 is disposed in the solid portion 20, the first cage 30 is disposed in the hollow portion 10 and the solid portion 20, and the second cage 40 is fitted over the first cage 30.

It is understood that in other embodiments, the pile 101 may also be substantially cylindrical or polygonal (e.g., triangular, pentagonal, hexagonal, octagonal, etc.) cylindrical; the pile tip 102 is conical, and the cross section of the pile tip 102 corresponds to the cross section of the pile body 101 (for example, the pile body 101 is a pentagonal column, and the pile tip 102 is a pentagonal cone); the peripheral wall of the core hole 11 may have a polygonal (e.g., triangular, square, rectangular, pentagonal, hexagonal, octagonal, etc.) cylindrical shape.

Referring to fig. 5 and 6 together, fig. 5 is a schematic view of a pile tip according to a second embodiment of the present invention; fig. 6 is a schematic view of a pile tip according to a third embodiment of the present invention.

In one embodiment of the present invention, the pile tip 102 includes a metal tip 1024, and the metal tip 1024 is disposed at an end of the pile tip 102 facing away from the pile body 101.

With the arrangement, the tip of the pile tip 102 is made of metal material instead of concrete material, so that the efficiency of the prefabricated building structure 100 in driving into the soil body can be improved, and the falling of the concrete at the pile tip 102 can be prevented to cause the strength reduction of the prefabricated building structure 100.

In one embodiment, the stub tip 102 further comprises a metal bracket 1025, wherein the outer peripheral wall of the metal bracket 1025 is of a truncated cone structure with a notch at the end part, and the end with the smaller inner diameter in the truncated cone structure is used for installing the metal tip 1024; the interior of the metal tines 1024 and the metal brackets 1025 are filled with concrete.

So set up, stake point 102 forms the outside structure for metal crate, inside is the concrete, and when stake point 102 was beaten into the soil body, metal crate had better penetrating power, and the concrete can give stake point 102 higher intensity to the concrete can not drop in metal crate's inside.

In a second embodiment shown in fig. 5, the metal prongs 1024 in the stub tip 102 are hollow and tapered, and the maximum outer diameter of the metal prongs 1024 is less than or equal to the minimum inner diameter of the metal support 1025, so as to achieve a snap fit between the metal prongs 1024 and the metal support 1025. In addition, metal frame 1025 has a through hole, and the concrete inside the metal frame has a through hole to form a first through hole 1023 on pile tip 102.

The third embodiment shown in fig. 6 is substantially the same as the second embodiment shown in fig. 5, except that the metal tip 1024 in the stub tip 102 is a solid structure; preferably, the solid structure is recessed relatively close to the end of the pile body 101 to increase the bonding force between the metal tip 1024 and the concrete.

Preferably, the metal prongs 1024 and the metal frame 1025 can be further fixedly connected by gluing, screwing, welding, or the like.

It is understood that in other embodiments, the metal tip 1024 may have other shapes, such as cross shape, step shape, wave shape, etc., as long as the function of guiding the pile body can be achieved during construction.

In one embodiment of the present invention, the prefabricated building structure 100 further comprises a first cage 30, the first cage 30 is disposed inside the pile body and the first cage 30 is made of prestressed reinforcement; the first cage body 30 comprises a plurality of first axial rib bodies 31, and the first axial rib bodies 31 are arranged along the axial direction of the pile body; the embedded connector 70 is connected to an end of the first axial rib 31.

According to the arrangement, before the prefabricated building structure 100 is used, prestress is applied to the steel bars in advance through a pre-tensioning method or a post-tensioning method to form prestressed steel bars, when the prefabricated building structure 100 bears tensile force generated by external load, the existing prestress in 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 the development of the cracks of the prefabricated building structure 100 are delayed, and the loads such as soil body extrusion, underground water scouring, earthquake load and self-gravity load which can be borne by the prefabricated building structure 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 first cage 30 is made of prestressed steel bars, so that the solid portion 20 and the hollow portion 10 have high vertical stress capability, and an integral stress foundation is formed. The tensioning machine can be connected with the first axial rib body 31, prestress is applied to the first axial rib body 31, and bearing capacity of the prefabricated building structure 100 is improved; the tensioning machine and the first axial rib body 31 are connected simply and conveniently, so that the construction time can be shortened, and the construction cost can be reduced.

In an embodiment of the present invention, the first cage 30 further comprises a first radial rib 32, the plurality of first axial ribs 31 form a frame of the first cage 30, and the first radial rib 32 spirally surrounds the frame of the first cage 30; the first radial rib 32 and the first axial rib 31 are fixed by spot welding.

With the arrangement, the first cage body 30 has high bearing strength and simple processing, and only the first radial rib bodies 32 are wound on the frame formed by the first axial rib bodies 31 while the plurality of first axial rib bodies 31 are axially transported, so that the working hours are saved; and can increase the number of turns and the encryption length that first radial muscle body 32 spirals around at the great position of atress degree as required, for example increase the number of turns and the encryption length that first radial muscle body 32 spirals around at the both ends of first cage 30, prevent that prefabricated building structure 100 from suffering structural failure when burying underground the excessive strength of bearing.

It is understood that, in other embodiments, the first radial rib 32 and the first axial rib 31, and the second axial rib 41 and the second radial rib 42 may be fixed by snapping, binding, or the like, which is not listed here.

In one embodiment, the first axial reinforcement 31 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 relief wire, a stranded wire, and a prestressed twisted steel; and/or the presence of a catalyst in the reaction mixture,

the first 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-relief wire, a strand, a prestressed twisted steel, a low carbon hot rolled steel disc strip, and a cold drawn low carbon wire for concrete products.

With the arrangement, when the tensioning machine is used for tensioning the first axial rib body 31, the first axial rib body 31 can bear larger prestress, the prestress can be well kept not to be lost, and the pressure borne by the tensioning machine in the service process is larger; in addition, when the tensioning machine is used for tensioning the first axial rib body 31, the first axial rib body 31 can transmit pretension to the first radial rib body 32, so that the first radial rib body 32 can also obtain a certain degree of pretension, the first radial rib body 32 can better receive and retain the prestress transmitted by the first axial rib body 31 by adopting the steel bars, and the situation that the first radial rib body 32 is brittle when the first cage body 30 is tensioned is avoided.

It is understood that the outer edge of the cross section of the first cage 30 is circular or polygonal, and the polygonal is triangular, square/rectangular, pentagonal, hexagonal, etc., which are not listed here.

With such an arrangement, the first cages 30 of different shapes can be designed according to the practical application and the corresponding stress condition of the prefabricated building structure 100, so as to achieve different force bearing effects.

In an embodiment of the present invention, the prefabricated building structure 100 further includes a second cage body 40, the second cage body 40 is disposed in the solid portion 20, and the first cage body 30 is disposed in the solid portion 20 and the hollow portion 10 and encloses the second cage body 40.

With such an arrangement, the arrangement of the second cage body 40 increases the local reinforcement ratio at the solid part 20, so that the longitudinal stress capacity and the anti-shearing force capacity are not lowered or raised relative to the solid pile, and the tensile capacity, the compressive capacity, the seismic capacity and the durability of the prefabricated building structure 100 are improved.

In one embodiment of the present invention, the second cage 40 extends to the end of the solid portion 20 relatively far from the hollow portion 10.

With such an arrangement, the end portion of the solid portion 20 relatively far away from the hollow portion 10 can be supported by the second cage 40, so as to prevent the end portion of the solid portion 20 from deforming and falling off during use or service, and the end portion of the solid portion 20 can bear larger pressure when the prefabricated building structure 100 is buried underground, and the prefabricated building structure 100 can be buried underground quickly.

In other embodiments, the second cage 40 may be located inside the solid portion 20, which may prevent the second cage 40 from being exposed to air and corroded.

It is understood that the outer edge of the cross-section of the second cage 40 is circular or polygonal, and the polygonal shape is triangular, square/rectangular, pentagonal, hexagonal, etc., which are not listed here.

With the arrangement, the second cages 40 in different shapes can be designed according to the practical application and the corresponding stress condition of the prefabricated building structure 100, so as to achieve different force bearing effects.

In one embodiment of the present invention, the second cage 40 is made of prestressed or deformed steel.

So set up, second cage 40 can select prestressing steel or screw-thread steel as required, and prestressing steel can further improve prefabricated building structure 100's vertical atress ability, and the screw-thread steel can reduce prefabricated building structure 100's cost of manufacture.

In an embodiment of the present invention, the second cage 40 includes a second axial rib 41 and a second radial rib 42, the second axial ribs 41 form a frame of the second cage 40, and the second radial rib 42 spirally surrounds the frame of the second cage 40; the second radial rib 42 and the second axial rib 41 are fixed by spot welding.

With the arrangement, the second cage body 40 and the first cage body 30 are simple and convenient in processing method and easy to produce, and meanwhile, the binding force between the axial rib bodies and the radial rib bodies is strong, so that the cage body is high in strength and not easy to deform in the using process.

In one embodiment, the second axial rib body 41 is made of at least one of deformed steel bars, steel bars for prestressed concrete (PC steel bars), stainless steel bars, hot rolled steel bars, medium strength prestressed wires, stress relief wires, steel strands, and prestressed deformed steel bars; and/or the presence of a catalyst in the reaction mixture,

the second radial rib 42 is made of at least one of deformed steel bars, prestressed concrete steel bars (PC steel bars), stainless steel bars, hot-rolled steel bars, medium-strength prestressed steel wires, stress-relief steel wires, steel strands, prestressed twisted steel bars, low-carbon steel hot-rolled disc strips, and cold-drawn low-carbon steel wires for concrete products.

In an embodiment of the present invention, the prefabricated building structure 100 further includes a mounting plate 50, the mounting plate 50 is disposed on the wall surface of the core chase 11 near one end of the solid portion 20, and the second cage 40 extends to the mounting plate 50 and is connected to the mounting plate 50.

So set up, the mounting panel 50 not only can make the second cage body 40 fixed, prevents that the second cage body 40 from warping and misplacing in the in-service process, can also prevent that the core print 11 from being close to the lateral wall of solid portion 20 relatively on the concrete drops, avoids the second cage body 40 to expose in the air, prevents the corruption of the second cage body 40, influences the use strength of the second cage body 40.

Specifically, the mounting plate 50 is a steel plate. The second cage 40 is welded to the mounting plate 50.

In an embodiment of the present invention, the prefabricated building structure 100 further includes a corner protector 60, the corner protector 60 being disposed on an end of the solid portion 20 relatively far from the hollow portion 10, and/or the corner protector 60 being disposed on an end of the hollow portion 10 relatively far from the solid portion 20.

With such an arrangement, the precast building structure 100 can be prevented from falling off the concrete on the end of the precast building structure 100 during the process of being buried in the ground or during service, which causes the second cage 40 or the first cage 30 to be exposed to corrosion, so that the strength of the precast building structure 100 is reduced.

Specifically, the corner protector 60 is carbon structural steel, preferably Q235 steel; the thickness of the corner protector 60 is 0.5mm to 12mm, and the height of the corner protector 60 in the axial direction of the prefabricated building structure 100 is 60mm to 500 mm. Preferably, the corner protector 60 has a thickness of 1mm to 8mm, and the height of the corner protector 60 in the axial direction of the prefabricated building structure 100 is 80mm to 200 mm.

Referring to fig. 7, fig. 7 is a schematic structural diagram of the embedded connector 70 shown in fig. 1.

In an embodiment of the present invention, the end of the first axial rib 31 relatively close to the pile tip 102 is provided with a pre-embedded connector 70, and the pre-embedded connector 70 is provided with a thread.

So set up, the tensioning machine can be through pre-buried connecting piece 70 connection first axial muscle body 31, and pre-buried connecting piece 70's setting can simplify the step of being connected between tensioning machine and the first axial muscle body 31, has saved the required length of time of stretch-draw. When the first cage 30 is connected with the stretch-draw machine through the external steel bar, the external steel bar can be quickly connected with the embedded connecting piece 70 through threads, the connection mode is simple, and the reliability of the connection position is high.

In an embodiment of the present invention, the second cage 40 is provided with a pre-embedded connector 70, and the pre-embedded connector 70 is located at an end of the solid portion 20 relatively far away from the hollow portion 10.

So configured, at the time of building construction, the prefabricated building structure 100 is generally required to be spliced with another prefabricated building structure to extend the length of the prefabricated building structure 100, or a cap 400 is poured after reinforcing bars are connected to the top of the prefabricated building structure 100 to bear superstructure. The second cage body 40 is provided with the embedded connecting piece 70, so that the combination rate of the two prefabricated building structures 100 can be increased; or the reinforcement ratio of the bearing platform 400 is improved, the connection mode between the prefabricated building structure 100 and the bearing platform 400 is simplified, the force transmission link in the stress process is reduced, the integral vertical stress capacity of the prefabricated building structure 100 is improved, and the mechanical property of the prefabricated building structure 100 and the bearing platform is guaranteed.

In one embodiment, the embedded connector 70 has an internal thread, the second axial rib 41 has an external thread, and the second axial rib 41 is connected with the embedded connector 70 through a thread.

In one embodiment, the pre-embedded connector 70 has a contraction opening 71 for connecting with the second axial rib 41 or the first axial rib 31; the end of the second axial rib 41 or the first axial rib 31 connected with the embedded connector 70 is provided with an upset 311, and the contraction opening 71 is used for limiting the upset 311.

In one embodiment of the present invention, the embedded connector 70 is further protruded with an annular protrusion 72 on the outer peripheral wall relatively close to the end of the prefabricated building structure 100. Preferably, the outer diameter of the annular protrusion 72 is gradually reduced from the end part of the embedded connector 70 to the middle part; the outer peripheral wall of the annular projection 72 is an arc surface.

With such an arrangement, the annular protrusion 72 can homogenize the prestress, so that the prestress which can be borne by the second cage 40 and/or the first cage 30 during the pre-stretching is larger, and the damage of the pre-buried connecting piece 70 is prevented.

It should be noted that the embedded connectors 70 in the two prefabricated building structures 100 may be of the same type or different types, and may be selected according to the working conditions.

In one embodiment of the present invention, the pre-buried connector 70 is formed together with the prefabricated building structure 100. It is understood that in other embodiments, the pre-embedded connectors 70 may be later connected to the second cage 40 or the first cage 30. The operation steps are that the concrete at the end of the prefabricated building structure 100 is chiseled to expose the first axial direction reinforcing steel bar or the second axial direction reinforcing steel bar, then the embedded connector 70 is connected to the end of the first axial direction reinforcing steel bar or the second axial direction reinforcing steel bar, and then the end of the first axial direction reinforcing steel bar or the second axial direction reinforcing steel bar is formed with the upset 311 by hot working, thus completing the connection.

The prefabricated building structures 100 may be used not only alone, but in combination with a plurality of prefabricated building structures 100. For example, two, three, four or even more prefabricated building structures 100 may be docked for use as required by the operating conditions.

Referring to fig. 8, fig. 8 is a schematic view illustrating the butt joint of two prefabricated building structures 100.

In one embodiment, the first cage 30 of each of the two prefabricated building structures 100 is provided with a quick connector, and the two quick connectors can be connected by a quick docking assembly 200 to extend the length of the prefabricated building structure 100.

In one embodiment, the quick docking assembly 200 is a ferrous metal. Preferably, the quick dock assembly 200 is carbon steel or alloy steel. Specifically, the quick butt joint assembly 200 is carbon steel, chromium vanadium steel, chromium nickel steel, chromium molybdenum steel, chromium nickel molybdenum steel, chromium manganese silicon steel, ultra-high strength steel or stainless steel. It is understood that in other embodiments, the quick dock assembly 200 may be constructed of other materials.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a quick docking assembly 200 according to an embodiment.

The quick docking assembly 200 in the first embodiment includes a first docking station 210 and a first base 220, the first docking station 210 includes a first fixing portion 211, a first inserting portion 212 and a first extending portion 213 located between the first fixing portion 211 and the first inserting portion 212, the first base 220 includes a second fixing portion 221 and a plurality of fins 222 connected to the second fixing portion 221, the first docking station 210 is connected to the quick connector of one of the prefabricated building structures 100 through the first fixing portion 211, and the first base 220 is connected to the quick connector of another prefabricated building structure 100 through the second fixing portion 221; the first plug part 212 is convexly arranged on the first extension part 213, and a first step surface 214 is formed between the first plug part 212 and the first extension part 213; the plurality of fins 222 are arranged around each other; the first inserting stage 210 can pass through the openings defined by the plurality of fins 222 through elastic expansion of the fins 222, the fins 222 can elastically contract and enclose the first extending portion 213, and the end surfaces of the fins 222 and the first step surface 214 of the first inserting stage 210 are oppositely arranged.

In this embodiment, the use process of the quick docking assembly 200 is as follows: the first plug 210 is connected with the embedded connector 70 in one prefabricated building structure 100 through a first fixing part 211, and the first base 220 is connected with the embedded connector 70 in the other prefabricated building structure 100 through a second fixing part 221; extending the first inserting-connecting part 212 and the first extending part 213 of the first inserting stage 210 into the inner wall of the first base 220 and moving along the inserting direction α, wherein the first inserting-connecting part 212 of the first inserting stage 210 applies pressure to the fin 222, so that the fin 222 elastically expands until the first inserting-connecting part 212 passes through the fin 222; when the first socket 210 is applied with a force in the direction opposite to the insertion direction α, the end of the fin 222 abuts against the first step surface 214 between the first socket 212 and the first extension 213 to limit the first socket 210.

The rapid docking assembly 200 and the embedded connector 70 provided by the embodiment are simple and convenient to mount, after the first plugging portion 212 of the first plugging platform 210 is inserted into the first base 220, the fin 222 can elastically contract and close the extension portion of the first base 220, the end portion of the fin 222 abuts against the step surface of the first plugging platform 210, and the abutting surface between the end portion of the fin 222 and the first step surface 214 of the first plugging platform 210 is approximately annular, so that the abutting area is large, the joint strength between two prefabricated building structures 100 can be ensured, and particularly, the vertical stress performance is greatly improved; the fins 222 not only can enclose the first extension part 213 of the insert table, but also can limit the first extension part 213, and prevent the first extension part 213 from shaking in the radial direction. In addition, the rapid docking assembly 200 provided by the embodiment has the advantages of simple processing technology, low cost and wide application range.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a quick docking assembly 200 according to another embodiment.

The quick docking assembly 200 of the second embodiment includes a second socket 230, a second base 240 and a ring buckle 250, wherein the second socket 230 includes a third fixing portion 231 and a second plugging portion 232 disposed oppositely, and the second plugging portion 232 is formed with a first groove 233; the second base 240 includes a first end surface 241 and a second end surface 242 which are oppositely arranged; the ring buckle 250 has an opening (not shown) and can be elastically contracted, and the ring buckle 250 is sleeved on the second insert stage 230 and accommodated in the first groove 233; the ring buckle 250 can be inserted into the second base 240 along the insertion direction together with the second insertion portion 232 of the second socket 230, and the ring buckle 250 can abut against the second end surface 242 of the second base 240 through elastic expansion and limit the reverse movement of the second socket 230 along the insertion direction.

After the second inserting portion 232 of the second inserting stage 230 is inserted into the second base 240, the ring buckle 250 can be ejected out of the first groove 233 through the elastic expansion portion and abuts against the second end face 242 of the second base 240, an abutting surface between the ring buckle 250 and the second end face 242 is approximately annular, an abutting area is large, the joint strength between two embedded connectors 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.

In one embodiment, after the two prefabricated building structures 100 are butted, a pile collar 300 is disposed on the peripheral wall of the junction between the two prefabricated building structures, and the pile collar 300 is used for fastening the butted joint of the two prefabricated building structures 100 to prevent the two prefabricated building structures 100 from being dislocated during use or service.

It is understood that the two prefabricated building structures 100 may be the same prefabricated pile or different prefabricated piles; the pile can be a solid pile, a hollow pile or a local hollow pile; can be a square pile or a tubular pile.

In one embodiment, a glue coating (not shown) is also provided between two prefabricated building structures 100. The glue coating layer fills the gap between the two prefabricated building structures 100 and the gap between the prefabricated building structures 100 and the quick butt joint component 200, prevents water or oxygen from corroding the first cage body 30, the second cage body 40 and the quick butt joint component 200 after being immersed, and increases the corrosion resistance of the components; after the glue coating layer is cured, the two prefabricated building structures 100 can be shaken or rotated, the rapid butt joint assembly and the prefabricated building structures 100 can be prevented from shaking or rotating, and the stability of the prefabricated building structures 100 is improved; the cured glue coating layer can bear the force, so that the two prefabricated building structures 100 are combined more tightly and firmly, and the stress performance is better; in addition, the glue coating layer can also play a role in uniform stress after being cured, even if the situation that the stress is slightly uneven exists between the two prefabricated building structures 100 or between the prefabricated building structures 100 and the quick butt joint assembly 200, the cured glue coating layer can also balance the stress, the vertical stress capacity of the prefabricated building structures 100 is improved, and the service life of the prefabricated building structures 100 is prolonged.

In one embodiment of the present invention, the adhesive layer is a paste adhesive.

So set up, the glue of paste is convenient for attach to and is difficult for flowing on prefabricated building structure 100's terminal surface to the glue of paste can also be extruded to prefabricated building structure 100 and dock the subassembly 200 fast when the butt joint between, makes to dock closely between subassembly 200 and the prefabricated building structure 100 fast, and whole prefabricated building structure 100 stability in use is better.

In one embodiment of the present invention, the adhesive is a two-liquid hybrid hardened glue (AB glue).

So set up, AB glue has that warehousing and transportation performance is good, uses more in a flexible way, and bonding strength is high, has advantages such as good vertical atress performance after the solidification.

In one embodiment of the present invention, the adhesive is an epoxy resin.

According to the arrangement, the epoxy resin has strong adhesive force, the chemical structure of the epoxy resin contains aliphatic hydroxyl, ether and extremely active epoxy groups, and the hydroxyl and the ether have high polarity, so that the epoxy resin has strong adhesive force, and the epoxy resin can firmly bond concrete, stone and various metal materials; the epoxy resin AB glue can be prepared into glue with different viscosities, the curing degree of the AB glue can be adjusted through normal-temperature curing, heating curing and other modes, and the curing time can be controlled within minutes to hours; in addition, the epoxy resin AB glue has good performance, and the cured epoxy resin AB glue has good performance, high mechanical strength, yellowing resistance, medium resistance, long aging resistance time, good electrical insulation, water resistance and moisture resistance and small volume shrinkage; the epoxy resin AB glue is nontoxic, has no three-waste emission in production, does not bring harm to the environment when in use, and meets the requirement of environmental protection; in addition, the epoxy resin AB glue has wide and easily available sources, low price and low cost.

Referring to fig. 11, fig. 11 is a schematic structural diagram of the prefabricated building structure 100 and the platform 400.

In one embodiment, prefabricated building structure 100 is mated to a cap 400.

In this embodiment, the solid portion 20 of the prefabricated building structure 100 is connected to the cap 400. The ends of the second cage body 40 and the first cage body 30, which are relatively far away from the hollow part 10, are provided with pre-embedded connectors 70, the pre-embedded connectors 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 mold, and the bearing platform 400 is formed after the concrete is dried and formed. In the embodiment, the second cage body 40 and the first cage body 30 are both provided with the embedded connecting pieces 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 method is safer and more reliable; but also better transfer the forces experienced by the cap 400 to the underlying foundation.

It is understood that in other embodiments, if the bearing platform 400 does not need to have very high bearing capacity, only the second cage 40 or the first cage 30 may be provided with the embedded connector 70 at the end relatively far from the hollow portion 10, and the embedded connector 70 is fixedly connected with the force transmission rib 410.

Referring to fig. 12, fig. 12 is a partially enlarged view of the portion C shown in fig. 11.

In one embodiment, the embedded connector 70 is provided with a through thread, one end of the embedded connector 70 is in threaded connection with the first axial rib 31 or the second axial rib 41, 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 embedded connector 70 may also be another type of steel bar, and the embedded connector 70 may also be fixedly connected to the first axial rib 31, the second axial rib 41, or the force transmission rib 410 by welding, clamping, or the like. Preferably, the embedded connector 70 is provided with an internal thread, the force transmission rib body 410 is provided with an external thread, and the two are connected in a threaded fit manner, so that the connection is simple and convenient, and the time cost during construction is saved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical 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 (10)

1. A prefabricated building structure (100) is characterized by comprising a pile body (101), a pile tip (102), a pre-embedded connecting piece (70) and a detachable connecting piece (80), wherein the pile body (101) is detachably connected with the pile tip (102); the embedded connecting piece (70) is arranged at the end part of the pile body (101), a first through hole (1023) is formed in the pile tip (102), the first through hole (1023) is aligned with the embedded connecting piece (70), and the detachable connecting piece (80) can be connected with the embedded connecting piece (70) through the first through hole (1023); the pile body (101) comprises a hollow part (10) and a solid part (20) which are connected with each other, and the hollow part (10) is hollow and surrounds to form a core groove (11).

2. The prefabricated building structure (100) of claim 1, wherein the pre-embedded connector (70) is provided with an internal thread, the disassembled connector (80) is provided with an external thread, and the pre-embedded connector (70) is in threaded connection with the disassembled connector (80).

3. The prefabricated building structure (100) of claim 1, wherein said prefabricated building structure (100) further comprises a first cage (30), said first cage (30) being arranged inside said pile (101) and said first cage (30) being made of prestressed reinforcement; the first cage body (30) comprises a plurality of first axial rib bodies (31), and the first axial rib bodies (31) are arranged along the axial direction of the pile body (101); the embedded connecting piece (70) is connected with the end part of the first axial rib body (31).

4. Prefabricated building structure (100) according to claim 3, characterised in that said pre-embedded connectors (70) have constrictions (71), the ends of said first axial tendons (31) relatively close to said pre-embedded connectors (70) having upsets (311), said constrictions (71) being adapted to limit said upsets (311).

5. Prefabricated building structure (100) according to claim 3, characterised in that said pre-buried connection (70) has an internal thread and said first axial rib (31) has an external thread, said pre-buried connection (70) being screwed to said first axial rib (31).

6. Prefabricated building structure (100) according to claim 1, characterized in that said pile body (101) is a square pile and said pile tip (102) is a quadrangular pyramid.

7. Prefabricated building structure (100) according to claim 6, characterized in that said pile tip (102) comprises a reinforcement bar (1020); the reinforcing rib (1020) comprises a reinforcing part (1021) and a yielding part (1022) which are connected with each other, the reinforcing part (1021) is in a quadrangular pyramid shape, and the edge of the reinforcing part (1021) corresponds to the edge of the pile toe (102); the yielding part (1022) is used for yielding the first through hole (1023).

8. Prefabricated building structure (100) according to claim 1, characterised in that said pile tip (102) comprises a metal tip (1024), said metal tip (1024) being arranged at the end of said pile tip (102) facing away from said pile body (101).

9. The prefabricated building structure (100) of claim 7 wherein said reinforcing bars (1020) are made of at least one of deformed steel bars, steel bars for prestressed concrete, steel bars for stainless steel, hot rolled steel bars, medium strength prestressed steel wires, stress relief steel wires, steel strands, prestressed deformed steel bars, hot rolled steel coils of mild steel, cold drawn mild steel wires for concrete products.

10. A prefabricated building structure (100) according to claim 1, wherein said first through holes (1023) have a filling plug therein for filling and sealing said first through holes (1023); and/or the presence of a catalyst in the reaction mixture,

the number of the first through holes (1023) is 4 to 20; and/or the presence of a catalyst in the reaction mixture,

the pile body (101) is a tubular pile, and the pile tip (102) is a cone.

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