Prefabricated tubular pile

Abstract

The utility model discloses a prefabricated pipe pile which comprises a reinforcement cage, two ends and a pile body. Inward first horizontal bar bodies and vertical bar bodies are arranged at the two ends of the first connecting steel bars. The first end face of the end head is a connecting disc for connecting the first horizontal rib body, namely the first horizontal rib body is attached to the end face of the connecting disc. The second end face of the end head is connected with a flange plate of another prefabricated pipe pile. The inner wall of the end head is provided with an annular protrusion used for being connected with the vertical rib body. The connection between the first horizontal rib body and the connecting disc and the connection between the vertical rib body and the annular protrusion are designed, so that the end and the reinforcement cage are more stable, and after the pile body is poured, the end and the pile body are more stable.

Description

Technical Field

[0001] This utility model relates to prefabricated components, and in particular to a prefabricated pipe pile. Background Technology

[0002] Precast pipe piles generally consist of a reinforcing cage, end caps installed at both ends of the reinforcing cage, and a pile body cast using inner and outer molds to cover the reinforcing cage. The end caps typically have flanges for use when connecting two precast pipe piles. Precast pipe piles are commonly constructed using the static pressure method, which offers advantages such as minimal damage to the precast pipe piles and low construction noise. A pile driver travels to the construction position, hoists the precast pipe pile into the pile driver, and uses the pile driver's own weight and counterweight to provide reaction force, pressing the precast pipe pile into the soil. The stability between the end caps and the reinforcing cage, and between the end caps and the pile body, is crucial in static pressure construction, especially when connecting two precast pipe piles. Utility Model Content

[0003] This application provides a precast pipe pile designed to improve the stability between the end and the reinforcing cage, and the stability between the end and the pile body.

[0004] This application provides a precast pipe pile, comprising:

[0005] The reinforcing cage includes: a first connecting reinforcing bar arranged in a circular array of no less than eight bars; a plurality of first reinforcing bar hoops tied to the first connecting reinforcing bars; each first connecting reinforcing bar has a first horizontal reinforcing bar and a vertical reinforcing bar forming an inward L-shape at both ends;

[0006] The two ends are cylindrical and are installed at both ends of the reinforcing cage. The first end face of the end is a connecting plate for connecting the first horizontal reinforcement, and the second end face is a flange for connecting another precast pipe pile. The inner wall has an annular protrusion for connecting vertical reinforcement. The surface corresponding to the inner wall of the annular protrusion, the surface corresponding to the outer wall of the connecting plate, and the two ends can form a casting cavity.

[0007] The pile body is the first layer of concrete inside the casting cavity.

[0008] In some embodiments, the reinforcing cage also includes two sets of third reinforcing steel hoops; the annular protrusions have holes for each vertical bar to pass through; the two sets of third reinforcing steel hoops are respectively tied to the protruding parts of the vertical bars at both ends of the precast pipe pile; both ends also have a second concrete layer, which covers the protruding parts of the corresponding set of second reinforcing steel hoops and vertical bars.

[0009] In some embodiments, the reinforcing cage further includes: second connecting reinforcing bars of the same number as the first connecting reinforcing bars, and a plurality of second reinforcing bar hoops tied to the second connecting reinforcing bars; each second connecting reinforcing bar has outward-facing second horizontal reinforcing bars at both ends, and the second horizontal reinforcing bars are tied to the first horizontal reinforcing bars.

[0010] In some embodiments, the innermost third reinforcing bar sleeve in the two sets of second reinforcing bar sleeves fits into the corresponding annular protrusion.

[0011] In some embodiments, the connecting disc has multiple pairs of limiting protrusions at the position of each first horizontal rib for the first horizontal rib to be engaged.

[0012] In some embodiments, there are multiple reinforcing ribs between the connecting plate and the flange at the end.

[0013] In summary, this application discloses a precast pipe pile, comprising a reinforcing cage, two ends, and a pile body. Both ends of the first connecting reinforcing bar have inward-facing horizontal and vertical reinforcing bars. The first end face of the end is a connecting plate for connecting the first horizontal reinforcing bars, i.e., the first horizontal reinforcing bars are fitted to the end face of the connecting plate. The second end face of the end is a flange for connecting another precast pipe pile. The inner wall of the end has an annular protrusion for connecting the vertical reinforcing bars. The design of the connection between the first horizontal reinforcing bars and the connecting plate, and the connection between the vertical reinforcing bars and the annular protrusion, makes the connection between the end and the reinforcing cage more stable, and after the pile is cast, the connection between the end and the pile body is also more stable. Attached Figure Description

[0014] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0015] Figure 1 This is a schematic diagram of the present application;

[0016] Figure 2 for Figure 1 A cross-sectional view along AA;

[0017] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0018] Figure 4 This is a schematic diagram of the reinforcing cage and its ends;

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the middle;

[0020] Figure 6 This is a partial sectional view of the present application after the addition of the second connecting steel bar and the second steel bar hoop.

[0021] In the picture,

[0022] 1. Reinforcing cage; 1a. First connecting reinforcement; 1a1. First horizontal reinforcement; 1a2. Vertical reinforcement; 1b. First reinforcement hoop; 1c. Third reinforcement hoop; 1d. Second connecting reinforcement; 1d1. Second horizontal reinforcement; 1e. Second reinforcement hoop;

[0023] 2. End; 2a. Connecting plate; 2a1. Limiting protrusion; 2b. Flange; 2c. Annular protrusion; 2d. Reinforcing rib;

[0024] 3. Pile body;

[0025] 4. Second concrete layer. Specific Implementation

[0026] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0027] Please see Figure 1 and Figure 2 A precast pipe pile includes a steel cage 1, two ends 2, and a pile body 3.

[0028] Please see Figure 2 and Figure 4 The steel cage 1 includes multiple first connecting steel bars 1a and multiple first steel bar hoops 1b.

[0029] The number of first connecting reinforcing bars 1a is no less than eight, arranged in a circular array. Each first connecting reinforcing bar 1a has a first horizontal reinforcing bar 1a1 and a vertical reinforcing bar 1a2 at both ends, pointing inwards (towards the center of the circular array). The first horizontal reinforcing bars 1a1 and vertical reinforcing bars 1a2 form an L-shape. That is, for the ends of the first connecting reinforcing bars 1a, a 90-degree bend is performed first, followed by a second 90-degree bend on the bent portion. The diameter of the first connecting reinforcing bars 1a is selected based on the length of the precast pipe pile.

[0030] The first reinforcing bar sleeve 1b is made by bending a reinforcing bar of a corresponding length into a circular shape. The diameter of the reinforcing bar is selected according to the length of the precast pipe pile. The diameter of the bent circular sleeve matches that of multiple first connecting reinforcing bars 1a arranged in a circular array. Multiple first reinforcing bar sleeves 1b are tied to the first connecting reinforcing bars 1a with tie wire. The number of first reinforcing bar sleeves 1b is designed according to the length of the precast pipe pile to make the reinforcement ratio between 0.8% and 1.5%.

[0031] Please see Figure 1 and Figure 2 The two ends 2 are cylindrical and are installed at both ends of the steel cage 1, that is, at the first horizontal reinforcement 1a1 and the vertical reinforcement 1a2.

[0032] The first end face of end 2 is a connecting plate 2a for connecting the first horizontal reinforcement 1a1, that is, the first horizontal reinforcement 1a1 fits against the end face of the connecting plate 2a, and the specific connection method between the two can be by binding with wire. The second end face of end 2 is a flange 2b for connecting another precast pipe pile, and the specific connection method between the two can be by fasteners. The inner wall of end 2 has an annular protrusion 2c for connecting the vertical reinforcement 1a2, and the specific connection method between the two can be by binding with wire.

[0033] Please see Figure 3 In some embodiments, the reinforcing cage 1 further includes two sets of third reinforcing bar hoops 1c. Each annular protrusion 2c has a hole corresponding to the position of each vertical reinforcing bar 1a2 for it to pass through. The two sets of third reinforcing bar hoops 1c are respectively tied to the protruding portions of the vertical reinforcing bars 1a2 at both ends of the precast pipe pile. Both ends 2 also have a second concrete layer 4, which covers the protruding portions of the corresponding set of second reinforcing bar hoops 1e and vertical reinforcing bars 1a2. More specifically, after the two ends 2 are installed in the reinforcing cage 1, a cylindrical inner mold is used to pass through the two ends 2. The outer wall of the inner mold is fitted against the inner wall of the annular protrusion 2c, and the inner mold, annular protrusion 2c, and ends 2 form an area for the second concrete layer 4 to be filled.

[0034] The stability between the end 2 and the steel cage 1 is further improved by the through-hole of the third steel reinforcement hoop 1c and the vertical reinforcement 1a2.

[0035] Please see Figure 3 In some embodiments, in the two sets of second steel reinforcement sleeves 1e, the innermost third steel reinforcement sleeve 1c fits into the corresponding annular protrusion 2c.

[0036] For each end 2, the third reinforcing bar sleeve 1c is fitted to the corresponding annular protrusion 2c, connecting to the following two points: the first horizontal reinforcing bar 1a1 is fitted to the end face of the connecting plate 2a; the vertical reinforcing bar 1a2 passes through the hole in the annular protrusion 2c. This is equivalent to completing the connection between end 2 and reinforcing cage 1, meaning that the binding wire used above is not required between the first horizontal reinforcing bar 1a1 and the connecting plate 2a, or between the vertical reinforcing bar 1a2 and the annular protrusion 2c.

[0037] Please see Figure 4 and Figure 5 In some embodiments, based on the above embodiment where "the innermost third steel reinforcement sleeve 1c fits the corresponding annular protrusion 2c", the connecting disc 2a has multiple pairs of limiting protrusions 2a1 for the first horizontal reinforcement 1a1 to be inserted at the position of each first horizontal reinforcement 1a1.

[0038] Similar to the vertical rib 1a2 passing through the hole of the annular protrusion 2c, the first horizontal rib 1a1 is inserted into the limiting protrusion 2a1, further restricting the radial movement and axial rotation between the end 2 and the steel cage 1, thereby further improving stability.

[0039] Please see Figure 2 A casting cavity can be formed between the inner wall of the annular protrusion 2c, the outer wall of the connecting plate 2a, and the two ends 2. More specifically, in conjunction with the above "using a cylindrical inner mold through the two ends 2, with the outer wall of the inner mold fitting against the inner wall of the annular protrusion 2c", that is, the outer wall of the inner mold is the surface corresponding to the inner wall of the annular protrusion 2c; then using a cylindrical outer mold fitted into the two ends 2, with the inner wall of the outer mold fitting against the outer wall of the connecting plate 2a, that is, the inner wall of the outer mold is the surface corresponding to the outer wall of the connecting plate 2a.

[0040] The pile body 3 is the first concrete layer in the pouring cavity. That is, after the concrete is poured into the pouring cavity to form the pile body 3, the inner mold and the outer mold are removed.

[0041] Please see Figure 6 In some embodiments, the steel cage 1 also includes multiple second connecting steel bars 1d and multiple second steel bar sleeves 1e.

[0042] The number of second connecting steel bars 1d and first connecting steel bars 1a is the same, and their diameter is selected according to the length of the precast pipe pile. Each second connecting steel bar 1d has outward-facing second horizontal reinforcing bars 1d1 at both ends, which are tied to the first horizontal reinforcing bars 1a1 with tie wire. In conjunction with the above embodiment where "the connecting disc 2a corresponds to the position of each first horizontal reinforcing bar 1a1 with multiple pairs of limiting protrusions 2a1 for the first horizontal reinforcing bars 1a1 to be inserted," the limiting protrusions 2a1 can be extended to allow the second horizontal reinforcing bars 1d1 to also be inserted.

[0043] The second reinforcing bar sleeve 1e is made by bending reinforcing bars of a corresponding length into a circular ring. The diameter of the reinforcing bar is selected according to the length of the precast pipe pile. The diameter of the bent ring matches that of multiple second connecting reinforcing bars 1d arranged in a circular array. Multiple second reinforcing bar sleeves 1e are tied to the second connecting reinforcing bars 1d with tie wire. The number of second reinforcing bar sleeves 1e is designed according to the length of the precast pipe pile to ensure that the reinforcement ratio is between 0.8% and 1.5%.

[0044] The addition of a second connecting steel and a second reinforcing steel hoop 1e makes the pile body 3 and the reinforcing cage 1 more stable.

[0045] Please see Figure 1 In some embodiments, there are multiple reinforcing ribs 2d between the connecting disc 2a and the flange 2b of the end 2.

Claims

1. A precast pipe pile, characterized by, The utility model relates to a prefabricated pipe pile, which comprises a reinforcement cage (1) and two end heads (2). The reinforcement cage (1) comprises a plurality of first connecting steels (1a) arranged in a circular array and no less than eight, a plurality of first steel hoops (1b) tied to the first connecting steels (1a), a first horizontal steel body (1a1) and a vertical steel body (1a2) formed in an L shape inward at both ends of each first connecting steel (1a). The two end heads (2) are in the shape of a cylinder and are respectively installed at both ends of the reinforcement cage (1); the first end face of the end head (2) is a connecting disc (2a) for connecting the first horizontal steel body (1a1), the second end face is a flange disc (2b) for connecting another prefabricated pipe pile, and the inner wall has an annular protrusion (2c) for connecting the vertical steel body (1a2); the face corresponding to the inner wall of the annular protrusion (2c), the face corresponding to the outer wall of the connecting disc (2a), and the space between the two end heads (2) can form a pouring cavity. The pile body (3) is a first concrete layer in the pouring cavity.

2. A precast pipe pile according to claim 1, wherein The reinforcement cage (1) further comprises two groups of third steel hoops (1c); the annular protrusion (2c) has a hole position corresponding to the position of each vertical steel body (1a2) for the vertical steel body (1a2) to pass through; the two groups of third steel hoops (1c) are respectively tied to the passing-through parts of the vertical steel bodies (1a2) at both ends of the prefabricated pipe pile; the two end heads (2) further each have a second concrete layer (4) covering a corresponding group of second steel hoops (1e) and the passing-through part of the vertical steel body (1a2).

3. A precast pipe pile according to claim 1, wherein The reinforcement cage (1) further comprises a plurality of second connecting steels (1d) with the same number as the first connecting steels (1a), and a plurality of second steel hoops (1e) tied to the second connecting steels (1d); each second connecting steel (1d) has a second horizontal steel body (1d1) outward at both ends, and the second horizontal steel body (1d1) is tied to the first horizontal steel body (1a1).

4. A precast pipe pile according to claim 2, wherein Among the two groups of second steel hoops (1e), the innermost third steel hoop (1c) is attached to the corresponding annular protrusion (2c).

5. A precast pipe pile according to claim 3, wherein The connecting disc (2a) has a plurality of pairs of limiting protrusions (2a1) corresponding to the position of each first horizontal steel body (1a1) for the first horizontal steel body (1a1) to be clamped into.

6. A precast pipe pile according to claim 1, wherein The connecting disc (2a) and the flange disc (2b) of the end head (2) further have a plurality of reinforcing steels (2d).

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