Special-shaped prestressed concrete pipe pile with high bearing capacity

Abstract

The utility model discloses a special-shaped prestressed concrete pipe pile with high bearing capacity, which is characterized in that the outer diameter of a first end plate is larger than that of a second end plate, a reinforcing structure positioned between a first skirt edge and a reinforcement cage is arranged on the first end plate, and the reinforcing structure comprises a plurality of main reinforcements and spiral reinforcing reinforcements; the first end plate, the second end plate, the reinforcement cage and the reinforcing structure are combined together through the iron wires between the reinforcing structure and the reinforcement cage, and subsequent processing of the concrete layer is facilitated; meanwhile, the concrete layer is provided with an annular transition slope on the peripheral side of the reinforcing structure, the large-outer-diameter end of the annular transition slope is the same as the outer diameter of the concrete layer close to the first end plate, and the small-outer-diameter end of the annular transition slope is the same as the outer diameter of the concrete layer close to the second end plate; and finally, the special-shaped prestressed concrete pipe pile with high bearing capacity at the lower end is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pipe piles, in particular to a high-bearing capacity special-shaped prestressed concrete pipe pile. Background Art

[0002] Prestressed concrete pipe piles have the characteristics of strong bearing capacity, good resistance to impact, strong penetration, short construction period, convenient construction, easy pile layout, low comprehensive cost, etc. They can be widely used in industrial and civil buildings, bridges, highways, railways, ports, water conservancy and other projects. Both ends of the prestressed concrete pipe piles are equipped with end plates, which are used to fix the steel bar ends of the steel cage inside the prestressed concrete pipe piles.

[0003] When driving piles, a pile tip is usually welded at the lower end of the first section of concrete pipe pile to ensure its penetration. However, the bearing capacity borne by the lower end of the first section of concrete pipe pile is relatively large, resulting in poor structural strength of the first section of concrete pipe pile. Utility Model Content

[0004] The utility model aims to provide a high-bearing capacity special-shaped prestressed concrete pipe pile, which has the function of improving the bearing capacity of the lower end of the concrete pipe pile body.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: a high-bearing capacity special-shaped prestressed concrete pipe pile, comprising a first end plate located at the bottom, a second end plate located at the top, a steel cage arranged between the first end plate and the second end plate, and a concrete layer, wherein the concrete layer is combined between the first end plate, the second end plate and the steel cage, the outer diameter of the first end plate is greater than the outer diameter of the second end plate, a first annular skirt is arranged on the first end plate, a reinforcing structure located between the first skirt and the steel cage is arranged on the first end plate, the reinforcing structure comprises a plurality of main steel bars arranged in a circumferential array, and reinforcing steel bars welded on the peripheral sides of the plurality of main steel bars and in a spiral shape, and the main steel bars comprise reinforcing steel bars arranged close to the main steel bars. A first vertical section near the first end plate, a curved section arranged above the first vertical section, and a second vertical section arranged above the curved section, wherein the lower ends of several of the first vertical sections are provided with positioning sections that abut against the inner side of the first skirt, the curved sections extend upwardly and obliquely toward the direction close to the steel cage, and the reinforcement structure and the steel cage are fixed by binding with multiple iron wires; the outer diameter of the concrete layer close to the first end plate is greater than the outer diameter close to the second end plate, and the concrete layer is provided with an annular transition slope on the peripheral side of the reinforcement structure, the end with a larger outer diameter of the annular transition slope is the same as the outer diameter of the concrete layer close to the first end plate, and the end with a smaller outer diameter of the annular transition slope is the same as the outer diameter of the concrete layer close to the second end plate.

[0006] The utility model is further configured as follows: a second annular second skirt is provided on the second end plate, a plurality of first annular reinforcement protrusions are provided on the peripheral side of the first skirt, and a plurality of second annular reinforcement protrusions are provided on the peripheral side of the second skirt.

[0007] The utility model is further configured as follows: one end of the first skirt is welded and arranged on the first end plate, and one end of the second skirt is welded and arranged on the second end plate.

[0008] The utility model is further configured as follows: a first annular groove is provided on the peripheral side of the first end plate, one end of the first skirt is embedded in the first annular groove after deformation, and a second annular groove is provided on the peripheral side of the second end plate, one end of the second skirt is embedded in the second annular groove after deformation.

[0009] The utility model is further configured as follows: the middle part of the concrete layer has a central hole with a circular cross-section, the end of the steel cage close to the first end plate is provided with a baffle located above the reinforcement structure, the baffle isolates the central hole of the concrete layer, the central hole of the concrete layer close to the first end plate is provided with a concrete reinforcement column, the concrete reinforcement column is combined between the inner circle of the concrete layer, the inner circle of the first end plate, and the baffle.

[0010] The utility model is further configured as follows: a support plate with a hanging ring is welded on the first end plate.

[0011] In summary, the beneficial effects of the utility model are:

[0012] 1. By setting the outer diameter of the first end plate to be larger than the outer diameter of the second end plate, and setting a reinforcing structure between the first skirt and the steel cage on the first end plate, the reinforcing structure includes a plurality of main steel bars and spiral reinforcing steel bars, and iron wires are passed between the reinforcing structure and the steel cage, the first end plate, the second end plate, the steel cage and the reinforcing structure are combined together, which is convenient for the subsequent processing of the concrete layer; at the same time, the concrete layer is provided with an annular transition slope on the peripheral side of the reinforcing structure, the end with a larger outer diameter of the annular transition slope is the same as the outer diameter of the concrete layer close to the first end plate, and the end with a smaller outer diameter of the annular transition slope is the same as the outer diameter of the concrete layer close to the second end plate; finally, a special-shaped prestressed concrete pipe pile with a high bearing capacity at the lower end is obtained;

[0013] 2. Several first annular reinforcement protrusions on the first skirt and second annular reinforcement protrusions on the second skirt can improve the structural strength of the first skirt and the second skirt, increase the ability to withstand earth pressure and water scouring, and ensure stability;

[0014] 3. The first skirt and the second skirt can be installed by welding to achieve connection with the first end plate and the second end plate respectively;

[0015] 4. The first skirt and the second skirt can be embedded and installed by deformation to achieve connection with the first end plate and the second end plate respectively, and avoid environmental pollution caused by welding;

[0016] 5. By setting baffles and concrete reinforcement columns, the bearing capacity of the lower end of the concrete pipe pile is further improved, thereby improving the structural strength;

[0017] 6. Due to the setting of baffles and concrete reinforcement columns, it is inconvenient to lift the concrete pipe piles. Support plates and hanging rings are set by welding to facilitate the lifting of concrete pipe piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of Example 1;

[0019] Figure 2 is a schematic diagram of the structure after the concrete layer is removed in Example 1;

[0020] Figure 3 is a structural schematic diagram of the reinforcement structure in Example 1;

[0021] Figure 4 is a schematic structural diagram of Example 2;

[0022] Figure 5 is a schematic cross-sectional view of the local structure of Example 2;

[0023] Figure 6 It is a structural cross-sectional view of the first end plate, the first skirt, the second end plate, and the second skirt in Example 3.

[0024] Figure numerals: 1. first end plate; 11. first annular groove; 2. second end plate; 21. second annular groove; 3. steel cage; 4. concrete layer; 41. annular transition slope; 42. center hole; 5. first skirt; 51. first annular reinforcing protrusion; 6. second skirt; 61. second annular reinforcing protrusion; 7. reinforcing structure; 71. main steel bar; 711. first vertical section; 712. curved section; 713. second vertical section; 714. positioning section; 72. reinforcing steel bar; 8. baffle; 9. concrete reinforcement column; 10. support plate; 101. hanging ring. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Embodiment 1: A high-bearing capacity special-shaped prestressed concrete pipe pile, such as Figure 1 and Figure 2 As shown, it includes a first end plate 1 located at the bottom, a second end plate 2 located at the top, a steel cage 3 arranged between the first end plate 1 and the second end plate 2, and a concrete layer 4.

[0027] like Figure 1 and Figure 2 As shown, the outer diameter of the first end plate 1 is greater than the outer diameter of the second end plate 2, and a first annular skirt 5 is provided on the first end plate 1, and a second annular skirt 6 is provided on the second end plate 2. A plurality of first annular reinforcement protrusions 51 are provided on the circumference of the first skirt 5, and a plurality of second annular reinforcement protrusions 61 are provided on the circumference of the second skirt 6. At the same time, one end of the first skirt 5 is welded to the first end plate 1, and one end of the second skirt 6 is welded to the second end plate 2.

[0028] like Figure 1 and Figure 2 As shown, the concrete layer 4 is combined between the first end plate 1, the second end plate 2, the first skirt 5, the second skirt 6 and the steel cage 3. The concrete layer 4 has a central hole 42 with a circular cross section in the middle.

[0029] like Figures 1 to 3 As shown, a reinforcing structure 7 located between the first skirt 5 and the steel cage 3 is provided on the first end plate 1. The reinforcing structure 7 includes a plurality of main steel bars 71 arranged in a circumferential array, and a reinforcing steel bar 72 welded and arranged on the peripheral side of the plurality of main steel bars 71 and in a spiral shape. The main steel bars 71 include a first vertical section 711 close to the first end plate 1, a curved section 712 arranged above the first vertical section 711, and a second vertical section 713 arranged above the curved section 712, wherein the lower ends of the first vertical sections 711 at intervals are provided with a positioning section 714 that abuts against the inner side of the first skirt 5, and the curved section 712 extends upwardly and obliquely toward the direction close to the steel cage 3. The reinforcing structure 7 and the steel cage 3 are fixed by a plurality of wire ties (not shown in the figure).

[0030] like Figures 1 to 3 As shown, the outer diameter of the concrete layer 4 close to the first end plate 1 is larger than the outer diameter close to the second end plate 2, and the concrete layer 4 is provided with an annular transition slope 41 on the peripheral side of the reinforcing structure 7, and the end of the annular transition slope 41 with a larger outer diameter is the same as the outer diameter of the concrete layer 4 close to the first end plate 1, and the end of the annular transition slope 41 with a smaller outer diameter is the same as the outer diameter of the concrete layer 4 close to the second end plate 2.

[0031] Implementation effect: By setting the outer diameter of the first end plate 1 to be larger than the outer diameter of the second end plate 2, and setting the reinforcing structure 7 between the first skirt 5 and the steel cage 3 on the first end plate 1, the reinforcing structure 7 includes a plurality of main steel bars 71 and spiral reinforcing steel bars 72, and the reinforcing structure 7 and the steel cage 3 are connected by iron wires, the first end plate 1, the second end plate 2, the steel cage 3 and the reinforcing structure 7 are combined together, which is convenient for the subsequent processing of the concrete layer 4; at the same time, the concrete layer 4 is provided with an annular transition slope 41 on the peripheral side of the reinforcing structure 7, the end with a larger outer diameter of the annular transition slope 41 is the same as the outer diameter of the concrete layer 4 close to the first end plate 1, and the end with a smaller outer diameter of the annular transition slope 41 is the same as the outer diameter of the concrete layer 4 close to the second end plate 2; finally, a special-shaped prestressed concrete pipe pile with high bearing capacity at the lower end is obtained. The first annular reinforcing protrusions 51 on the first skirt 5 and the second annular reinforcing protrusions 61 on the second skirt 6 can improve the structural strength of the first skirt 5 and the second skirt 6, improve the strength to withstand earth pressure and water scouring, and ensure stability. The first skirt 5 and the second skirt 6 can be installed by welding to be connected to the first end plate 1 and the second end plate 2 respectively.

[0032] Embodiment 2: A high-bearing capacity special-shaped prestressed concrete pipe pile, such as Figure 4 and Figure 5 As shown, the difference from Example 1 is that a baffle 8 located above the reinforcement structure 7 is provided at one end of the steel cage 3 close to the first end plate 1, the baffle 8 isolates the central hole 42 of the concrete layer 4, a concrete reinforcement column 9 is provided in the central hole 42 of one end of the concrete layer 4 close to the first end plate 1, and the concrete reinforcement column 9 is combined between the inner circle of the concrete layer 4, the inner circle of the first end plate 1, and the baffle 8. At the same time, a support plate 10 with a hanging ring 101 is welded on the first end plate 1.

[0033] Implementation effect: By setting the baffle 8 and the concrete reinforcement column 9, the bearing capacity of the lower end of the concrete pipe pile is further improved, and the structural strength is improved. At the same time, due to the setting of the baffle 8 and the concrete reinforcement column 9, the concrete pipe pile is inconvenient to lift, and the support plate 10 and the hanging ring 101 are welded to facilitate the lifting of the concrete pipe pile.

[0034] Embodiment 3: A high-bearing capacity special-shaped prestressed concrete pipe pile, such as Figure 6 As shown, the difference from Example 1 is that a first annular groove 11 is provided on the circumferential side of the first end plate 1, and one end of the first skirt 5 is embedded in the first annular groove 11 after being deformed, and a second annular groove 21 is provided on the circumferential side of the second end plate 2, and one end of the second skirt 6 is embedded in the second annular groove 21 after being deformed.

[0035] Implementation effect: The first skirt 5 and the second skirt 6 can be embedded and installed by deformation to achieve connection with the first end plate 1 and the second end plate 2 respectively, and avoid environmental pollution caused by welding.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-bearing capacity special-shaped prestressed concrete pipe pile, comprising a first end plate (1) located at a lower part, a second end plate (2) located at an upper part, a steel cage (3) arranged between the first end plate (1) and the second end plate (2), and a concrete layer (4), wherein the concrete layer (4) is combined between the first end plate (1), the second end plate (2) and the steel cage (3), and characterized in that: The outer diameter of the first end plate (1) is greater than the outer diameter of the second end plate (2); the first end plate (1) is provided with a first annular skirt (5); the first end plate (1) is provided with a reinforcing structure (7) located between the first skirt (5) and the steel cage (3); the reinforcing structure (7) comprises a plurality of main steel bars (71) arranged in a circumferential array, and reinforcing steel bars (72) welded to the circumference of the plurality of main steel bars (71) and in a spiral shape; the main steel bars (71) comprise a first skirt (5) disposed near the first end plate; (1) a first vertical section (711), a curved section (712) arranged above the first vertical section (711), and a second vertical section (713) arranged above the curved section (712), wherein the lower ends of a plurality of the first vertical sections (711) are provided with positioning sections (714) which abut against the inner side of the first skirt (5), the curved section (712) extends upwardly and obliquely toward the direction approaching the steel cage (3), and the reinforcing structure (7) and the steel cage (3) are bound and fixed by a plurality of iron wires; The outer diameter of the concrete layer (4) close to the first end plate (1) is larger than the outer diameter close to the second end plate (2); the concrete layer (4) is provided with an annular transition slope (41) on the peripheral side of the reinforcing structure (7); the end with a larger outer diameter of the annular transition slope (41) is the same as the outer diameter of the concrete layer (4) close to the first end plate (1); and the end with a smaller outer diameter of the annular transition slope (41) is the same as the outer diameter of the concrete layer (4) close to the second end plate (2).

2. A high-bearing capacity special-shaped prestressed concrete pipe pile according to claim 1, characterized in that: The second end plate (2) is provided with a second annular skirt (6), the first skirt (5) is provided with a plurality of first annular reinforcement protrusions (51) on its circumferential side, and the second skirt (6) is provided with a plurality of second annular reinforcement protrusions (61) on its circumferential side.

3. A high-bearing capacity special-shaped prestressed concrete pipe pile according to claim 2, characterized in that: One end of the first skirt (5) is welded to the first end plate (1), and one end of the second skirt (6) is welded to the second end plate (2).

4. A high-bearing capacity special-shaped prestressed concrete pipe pile according to claim 2, characterized in that: A first annular groove (11) is provided on the circumferential side of the first end plate (1), and one end of the first skirt (5) is embedded in the first annular groove (11) after being deformed; a second annular groove (21) is provided on the circumferential side of the second end plate (2), and one end of the second skirt (6) is embedded in the second annular groove (21) after being deformed.

5. The high-bearing capacity special-shaped prestressed concrete pipe pile according to claim 1, characterized in that: The concrete layer (4) has a central hole (42) with a circular cross-section in the middle, and the end of the steel cage (3) close to the first end plate (1) is provided with a baffle (8) located above the reinforcement structure (7), and the baffle (8) isolates the central hole (42) of the concrete layer (4). A concrete reinforcement column (9) is provided in the central hole (42) at the end of the concrete layer (4) close to the first end plate (1), and the concrete reinforcement column (9) is combined between the inner circle of the concrete layer (4), the inner circle of the first end plate (1), and the baffle (8).

6. A high-bearing capacity special-shaped prestressed concrete pipe pile according to claim 1, characterized in that: A support plate (10) having a hanging ring (101) is welded onto the first end plate (1).

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