Enhanced precast pile

Abstract

The utility model provides a reinforced precast pile which comprises a pile body and end plates arranged at the upper end and the lower end of the pile body. The pile body is a concrete pile body, and a reinforcement cage is embedded in the pile body; the reinforcement cage comprises a plurality of longitudinal reinforcement groups distributed at equal intervals in the circumferential direction and a plurality of ring reinforcements wound on the longitudinal reinforcement groups; each longitudinal steel bar set is composed of two longitudinal steel bars, and the two longitudinal steel bars are arranged in the radial direction of the pile body and welded to the inner side and the outer side of the ring steel bar correspondingly. The end plate comprises an end plate body and an anchoring assembly arranged on the side, opposite to the pile body, of the end plate body, and the anchoring assembly is anchored in concrete of the pile body. The reinforced precast pile is reasonable in structural design, high in horizontal shear resistance, bending resistance and vertical pulling resistance, good in connectivity between the pile body and the end plates and high in overall stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of prefabricated piles, in particular to a reinforced prefabricated pile. Background Art

[0002] Precast concrete piles have the advantages of low production cost, ability to withstand large loads, durability, fast construction speed, simple construction, and low technical difficulty, and are widely used in the construction of buildings, roads, bridges, docks, etc. However, existing precast concrete piles still have some shortcomings, such as poor connectivity between the pile body and the end plate, insufficient vertical pull-out resistance, horizontal shear resistance, and bending resistance of the pile body itself, and limited overall stability of the precast piles. Utility Model Content

[0003] In view of this, in order to solve the above technical problems, the utility model proposes a reinforced precast pile with reasonable structural design, strong horizontal shear and bending resistance and vertical pull-out resistance, good connection between the pile body and the end plate, and high overall stability.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A reinforced prefabricated pile comprises a pile body and end plates arranged at the upper and lower ends of the pile body, wherein the pile body is a concrete pile body with a steel cage buried inside;

[0006] The steel cage includes a plurality of longitudinal steel bar groups equally spaced along the circumferential direction and a plurality of ring steel bars wound around the longitudinal steel bar groups; each of the longitudinal steel bar groups is composed of two longitudinal steel bars, which are arranged in the radial direction of the pile body and are welded to the inner and outer sides of the ring steel bar respectively;

[0007] The end plate comprises an end plate body and an anchoring assembly arranged on a side of the end plate body opposite to the pile body, and the anchoring assembly is anchored in the concrete of the pile body.

[0008] The steel cage buried in the concrete pile body adopts multiple ring steel bars to wrap multiple longitudinal steel bar groups composed of two longitudinal steel bars. The two longitudinal steel bars are arranged according to the radial direction of the pile body and are respectively welded to the inner and outer sides of the ring steel bars. The overall strength and stability of the steel cage are improved, which can effectively enhance the vertical tensile strength and horizontal shear and bending resistance of the pile body. At the same time, the end plate is provided with an anchor assembly to improve the connectivity with the pile body, and the overall stability of the precast pile is effectively enhanced.

[0009] Furthermore, the longitudinal steel bar group includes a prestressed steel bar group and a non-prestressed steel bar group, the two longitudinal steel bars in the prestressed steel bar group are both prestressed steel bars, and the two longitudinal steel bars in the non-prestressed steel bar group are both non-prestressed steel bars; the prestressed steel bar group and the non-prestressed steel bar group are distributed at intervals; the ends of the two longitudinal steel bars in the prestressed steel bar group are fixed to the reinforcement fixing holes on the end plate body, and the ends of the two longitudinal steel bars in the prestressed steel bar group are staggered from the anchor assembly.

[0010] The prestressed steel bar groups and non-prestressed steel bar groups are arranged at intervals to optimize the steel cage structure and improve stability. The prestressed steel bar groups can bear vertical tension and pressure, while the non-prestressed steel bar groups bear horizontal shear loads. Combining the prestressed steel bar groups and the non-prestressed steel bar groups can optimize the horizontal shear and bending resistance and vertical pull-out resistance of the precast piles under a certain reinforcement ratio.

[0011] Furthermore, the end plate body is an annular structure provided with a center hole; the anchor assembly includes an outer reinforcement hoop plate circumferentially arranged along the outer edge of the end plate body, an inner reinforcement hoop plate circumferentially arranged along the inner edge of the end plate body, and anchor steel bars fixed to the end plate body between the outer reinforcement hoop plate and the inner reinforcement hoop plate; the outer reinforcement hoop plate is sleeved on the outer side wall at the end head of the pile body, the inner reinforcement hoop plate is embedded in the inner side wall at the end head of the pile body, and the anchor steel bars are anchored in the concrete at the end head of the pile body.

[0012] The end plate is firmly connected to the concrete pile body at multiple points through external reinforcement hoops, internal reinforcement hoops and anchor steel bars, which enhances the bonding strength between the end plate and the pile body concrete, reduces the risk of fracture between the end plate and the pile body, and enhances the overall stability.

[0013] Furthermore, a plurality of through holes are formed on the outer reinforcement hoop plate and the inner reinforcement hoop plate in the circumferential direction.

[0014] When pouring concrete, the concrete can enter the through hole and combine more firmly with the outer reinforcement hoop plate and the inner reinforcement hoop plate.

[0015] Furthermore, the anchoring steel bar includes a reinforcing steel bar having one end fixed to the end plate body and an anchor head arranged at the other end of the reinforcing steel bar.

[0016] Furthermore, an FRP reinforced tube is fitted on the inner wall of the pile body.

[0017] FRP reinforced pipes can further enhance the bearing capacity, bending and shear resistance of the pile body and improve the overall stability.

[0018] Furthermore, a connecting pipe sleeve is provided at the bottom of the inner reinforcement hoop plate, and an outer wall of the connecting pipe sleeve is provided with an external thread; both ends of the FRP reinforced pipe are provided with internal threads adapted to the external threads on the outer wall of the connecting pipe sleeve, and both ends of the FRP reinforced pipe are connected to the connecting pipe sleeves at both ends by threaded connection.

[0019] The FRP reinforced pipe is connected to the end plates on both sides by threaded connection, which facilitates the assembly of the structural frame during the preparation process and enables the frame to be hoisted as a whole into the mold for concrete pouring after assembly.

[0020] Compared with the prior art, the reinforced prefabricated piles described in the utility model have the following advantages:

[0021] (1) The reinforced precast pile described in the utility model adopts a special steel cage structure, which effectively improves the overall strength and stability of the steel cage, thereby effectively enhancing the vertical pull-out resistance and horizontal shear and bending resistance of the pile body. At the same time, the end plate is provided with an anchor assembly, which can improve the connection with the pile body, and the overall stability of the precast pile is significantly enhanced;

[0022] (2) The reinforced precast pile described in the utility model optimizes the steel cage structure by arranging the prestressed steel bar group and the non-prestressed steel bar group at intervals, and the layout is reasonable. The stress steel bar group improves the vertical tensile and compressive resistance, and the non-prestressed steel bar group improves the horizontal shear resistance. Under a certain reinforcement ratio, the horizontal shear resistance, bending resistance and vertical pull-out resistance of the precast pile are optimized, thereby enhancing stability.

[0023] (3) The end plate of the reinforced precast pile described in the utility model is firmly connected to the concrete pile body at multiple points through the outer reinforcement hoop plate, the inner reinforcement hoop plate and the anchor steel bar, thereby enhancing the bonding force between the end plate and the pile body concrete, reducing the risk of fracture between the end plate and the pile body, and enhancing the overall stability;

[0024] (4) The reinforced prefabricated piles described in the present invention are also provided with FRP reinforcement tubes to further enhance the bearing capacity, bending and shearing resistance of the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the enhanced prefabricated pile described in Example 1 of the utility model;

[0027] Figure 2 for Figure 1 The cross-sectional view at AA in FIG.

[0028] Figure 3 It is a structural schematic diagram of one side of the end plate corresponding to the pile body described in Example 1 of the utility model;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the enhanced precast pile described in Example 2 of the utility model;

[0030] Figure 5 This is a schematic structural diagram of one side of the end plate corresponding to the pile body described in Example 2 of the utility model;

[0031] Figure 6 This is a schematic structural diagram of the reinforced precast piles described in Example 3 of the utility model.

[0032] Description of reference numerals:

[0033] 1-pile body, 2-end plate, 3-longitudinal steel bar group, 4-ring steel bar, 5-prestressed steel bar group, 6-non-prestressed steel bar group, 7-end plate body, 8-anchor assembly, 9-rebar fixing hole, 10-external reinforcement hoop plate, 11-inner reinforcement hoop plate, 12-anchor steel bar, 13-through hole, 14-FRP reinforced pipe, 15-connecting pipe sleeve. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0038] Example 1

[0039] like Figure 1 , 2 As shown in 3, a reinforced prefabricated pile comprises a pile body 1 and end plates 2 arranged at the upper and lower ends of the pile body 1;

[0040] The pile body 1 is a concrete pile body, and a steel cage is buried inside; the steel cage includes a plurality of longitudinal steel bar groups 3 distributed at equal intervals along the circumferential direction and a plurality of ring steel bars 4 wound around the longitudinal steel bar groups 3; each longitudinal steel bar group 3 is composed of two longitudinal steel bars, which are arranged in the radial direction of the pile body 1 and are welded to the inner and outer sides of the ring steel bar 4 respectively; the longitudinal steel bar group 3 includes a prestressed steel bar group 5 and a non-prestressed steel bar group 6, the two longitudinal steel bars in the prestressed steel bar group 5 are both prestressed steel bars, and the two longitudinal steel bars in the non-prestressed steel bar group 6 are both non-prestressed steel bars; the prestressed steel bar group 5 and the non-prestressed steel bar group 6 are distributed at intervals;

[0041] The end plate 2 includes an end plate body 7 and an anchor assembly 8 arranged on the side of the end plate body 7 opposite to the pile body 1; the end plate body 7 is an annular structure with a central hole, on which a plurality of reinforcing bar fixing holes 9 are distributed, and the ends of the two longitudinal steel bars in the prestressed steel bar group 5 are fixed to the corresponding reinforcing bar fixing holes 9 and staggered with the anchor assembly 8; the anchor assembly 8 includes an outer reinforcing hoop plate 10 arranged circumferentially along the outer edge of the end plate body 7, an inner reinforcing hoop plate 11 arranged circumferentially along the inner edge of the end plate body 7, and an outer reinforcing hoop plate 12 arranged The anchor steel bar 12 is fixed to the end plate body 7 between the plate 10 and the inner reinforcement hoop plate 11; the outer reinforcement hoop plate 10 is sleeved on the outer side wall at the end of the pile body 1, and the inner reinforcement hoop plate 11 is embedded in the inner side wall at the end of the pile body 11. A plurality of through holes 13 are opened in the circumferential direction on the outer reinforcement hoop plate 10 and the inner reinforcement hoop plate 11; the anchor steel bar 12 includes a reinforcement steel bar fixed to the end plate body 7 at one end and an anchor head arranged at the other end of the reinforcement steel bar, and the anchor steel bar anchor 12 is fixed in the concrete at the end of the pile body 1.

[0042] Example 2

[0043] On the basis of Example 1, different from Example 1, Figure 4 and 5 As shown, the longitudinal steel bar groups 3 are all prestressed steel bar groups 5, and the two longitudinal steel bars in the prestressed steel bar groups 5 are all prestressed steel bars; corresponding numbers and positions of reinforcement fixing holes 9 are distributed on the end plate body 7, and the ends of the two longitudinal steel bars in the prestressed steel bar groups 5 are fixed to the corresponding reinforcement fixing holes 9 and staggered with the anchor assembly 8.

[0044] Example 3

[0045] On the basis of Example 1, different from Example 1, Figure 6As shown, an FRP reinforced pipe 14 is fitted on the inner wall of the pile body 1; a connecting pipe sleeve 15 is provided at the bottom of the inner reinforcing hoop plate 11, and an outer wall of the connecting pipe sleeve 15 is provided with an external thread; both ends of the FRP reinforced pipe 14 are provided with internal threads adapted to the external threads on the outer wall of the connecting pipe sleeve 15, and both ends of the FRP reinforced pipe 14 are connected to the connecting pipe sleeves 15 at both ends by threaded connection.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced prefabricated pile, comprising a pile body and end plates arranged at the upper and lower ends of the pile body, wherein the pile body is a concrete pile body with a steel cage buried inside; characterized in that: The steel cage includes a plurality of longitudinal steel bar groups equally spaced along the circumferential direction and a plurality of ring steel bars wound around the longitudinal steel bar groups; each of the longitudinal steel bar groups is composed of two longitudinal steel bars, which are arranged in the radial direction of the pile body and are welded to the inner and outer sides of the ring steel bar respectively; The end plate comprises an end plate body and an anchoring assembly arranged on a side of the end plate body opposite to the pile body, and the anchoring assembly is anchored in the concrete of the pile body.

2. The reinforced prefabricated pile according to claim 1, characterized in that: The longitudinal steel bar group includes a prestressed steel bar group and a non-prestressed steel bar group, the two longitudinal steel bars in the prestressed steel bar group are both prestressed steel bars, and the two longitudinal steel bars in the non-prestressed steel bar group are both non-prestressed steel bars; the prestressed steel bar group and the non-prestressed steel bar group are distributed at intervals; the ends of the two longitudinal steel bars in the prestressed steel bar group are fixed to the reinforcement fixing holes on the end plate body, and the ends of the two longitudinal steel bars in the prestressed steel bar group are staggered from the anchor assembly.

3. The reinforced prefabricated pile according to claim 1 or 2, characterized in that: The end plate body is an annular structure with a center hole; the anchor assembly includes an outer reinforcement hoop plate circumferentially arranged along the outer edge of the end plate body, an inner reinforcement hoop plate circumferentially arranged along the inner edge of the end plate body, and anchor steel bars fixed to the end plate body between the outer reinforcement hoop plate and the inner reinforcement hoop plate; the outer reinforcement hoop plate is sleeved on the outer side wall at the end of the pile body, the inner reinforcement hoop plate is embedded in the inner side wall at the end of the pile body, and the anchor steel bars are anchored in the concrete at the end of the pile body.

4. The reinforced prefabricated pile according to claim 3, characterized in that: The outer reinforcement hoop plate and the inner reinforcement hoop plate are provided with a plurality of through holes along the circumferential direction.

5. The reinforced prefabricated pile according to claim 3, characterized in that: The anchoring steel bar comprises a reinforcing steel bar having one end fixed to the end plate body and an anchor head arranged at the other end of the reinforcing steel bar.

6. The reinforced prefabricated pile according to claim 3, characterized in that: The inner wall of the pile body is fitted with an FRP reinforced tube.

7. The reinforced prefabricated pile according to claim 6, characterized in that: A connecting sleeve is provided at the bottom of the inner reinforcement hoop plate, and an outer wall of the connecting sleeve is provided with an external thread; both ends of the FRP reinforced pipe are provided with internal threads adapted to the external threads on the outer wall of the connecting sleeve, and both ends of the FRP reinforced pipe are connected to the connecting sleeves at both ends by threaded connection.

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