High-stability precast pile

Abstract

The utility model provides a high-stability precast pile which comprises a pile body, end plates installed at the upper end and the lower end of the pile body and a reinforcement cage embedded in the pile body, and the reinforcement cage comprises a plurality of longitudinal reinforcements distributed at equal intervals in the circumferential direction and a plurality of ring reinforcements welded to the longitudinal reinforcements. Two layers of reinforcement cages are arranged, the longitudinal reinforcements of the reinforcement cage located at the inner ring are prestressed reinforcements or mixed reinforcements of prestressed reinforcements and non-prestressed reinforcements, and the longitudinal reinforcements of the reinforcement cage located at the outer ring are mixed reinforcements of prestressed reinforcements and non-prestressed reinforcements; the reinforcing ring plate and the stability increasing ring plate are embedded in the outer side wall of the pile body, and a circle of protruding part inserted into surrounding soil is arranged on the outer side wall of the stability increasing ring plate in the circumferential direction. The high-stability precast pile is high in vertical bearing capacity, good in ductility, high in horizontal bending resistance and shear resistance, reasonable in structural design and high in overall structural stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of precast piles, and particularly relates to a precast pile with high stability. Background Art

[0002] Concrete precast piles have the advantages of low production cost, large load-bearing capacity, firmness and durability, fast construction speed, simple construction and low technical difficulty, and are widely used in engineering construction such as buildings, roads, bridges, wharves, etc. Among them, prestressed concrete precast piles are favored due to their good vertical bearing capacity and low price. However, the existing prestressed concrete precast piles have poor ductility and weak horizontal bending and shear resistance. When subjected to a large lateral impact, the prestressed steel bars in the pile are prone to brittle failure. If a mixed reinforcement method of non-prestressed steel bars and prestressed steel bars is adopted, this situation can be alleviated. The existing mixed reinforcement mode has certain deficiencies in reinforcement ratio and reinforcement structure design, and there is still room for improvement in its ductility, horizontal bending and shear resistance. In addition, the vertical uplift resistance of precast piles also needs to be improved to enhance the overall stability of precast piles. Content of the Utility Model

[0003] In view of this, in order to solve the above technical problems, the utility model provides a precast pile with high stability, which has strong vertical bearing capacity, good ductility, high horizontal bending and shear resistance, reasonable structural design and strong overall structural stability.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A precast pile with high stability includes a pile body, end plates installed at both upper and lower ends of the pile body, and a steel reinforcement cage buried in the pile body. The steel reinforcement cage includes a plurality of longitudinal steel bars equally spaced along the circumferential direction and a plurality of hoop steel bars wound and welded on the longitudinal steel bars; the steel reinforcement cage is provided with two layers. The longitudinal steel bars of the steel reinforcement cage in the inner circle are prestressed steel bars or a mixed reinforcement of prestressed steel bars and non-prestressed steel bars, and the longitudinal steel bars of the steel reinforcement cage in the outer circle are a mixed reinforcement of prestressed steel bars and non-prestressed steel bars; it also includes a reinforcing ring plate and a stability-enhancing ring plate embedded on the outer side wall of the pile body, and a protruding part inserted into the surrounding soil is arranged along the circumferential direction on the outer side wall of the stability-enhancing ring plate.

[0006] The structural design of using a double-layer steel reinforcement cage can improve the reinforcement ratio and enhance the overall mechanical properties. The inner circle uses prestressed steel bars or a mixed reinforcement of prestressed steel bars and non-prestressed steel bars, and the outer circle uses a mixed reinforcement of prestressed steel bars and non-prestressed steel bars to optimize the steel bar skeleton structure. The prestressed steel bars provide good vertical bearing capacity, while the non-prestressed steel bars are used to improve ductility, horizontal bending and shear resistance. At the same time, a reinforcing ring plate and an uplift resistance improvement device are arranged on the pile body to improve the various properties of the precast pile as a whole and achieve the improvement of overall stability.

[0007] Further, the longitudinal steel bars of the steel reinforcement cage located in the outer ring are arranged in two circles, respectively arranged along the inner and outer circumferences of the circular steel bars.

[0008] The design structure of the outer ring steel reinforcement cage with two circles of longitudinal steel bars can not only increase the reinforcement ratio, thus improving the overall performance, but also increase the welding area with the circular steel bars, enhance the welding strength between the longitudinal steel bars and the circular steel bars, improve the overall stability of the framework, and reduce the risk brought by open welding.

[0009] Further, the longitudinal steel bars arranged inside the inner circumference of the circular steel bars of the steel reinforcement cage located in the outer ring are prestressed steel bars, and the longitudinal steel bars arranged outside are non-prestressed steel bars.

[0010] The prestressed steel bars arranged inside bear the vertical tensile and compressive forces, and the non-prestressed steel bars arranged outside bear the horizontal shear load, realizing the optimization of the horizontal shear resistance, bending resistance and vertical uplift resistance of the precast pile.

[0011] Further, there are multiple of the reinforcing ring plates and the stability-enhancing ring plates, which are alternately arranged at intervals one by one, further enhancing the horizontal shear resistance and bending resistance of the precast pile.

[0012] Further, a plurality of annular grooves for embedding the reinforcing ring plates and the stability-enhancing ring plates are axially distributed on the outer side wall of the pile body.

[0013] Further, the protruding part is of a conical ring structure, and its vertical section gradually becomes smaller in the direction away from the pile body.

[0014] The protruding part can be embedded in the surrounding soil. With the conical ring structure, the resistance during the pile driving process is small.

[0015] Further, the upper end surface of the protruding part is of a downwardly concave structure, forming a concave groove.

[0016] This not only reduces the self-weight of the protruding part, but also enables the surrounding soil to enter the concave groove through the design of the concave groove, enabling the protruding part to be better inserted into the surrounding soil layer and improving the uplift resistance.

[0017] Further, a plurality of vertically arranged rib plates are circumferentially distributed at intervals between the lower end surface of the protruding part and the outer side wall of the stability-enhancing ring plate.

[0018] The rib plates can not only strengthen the connection strength between the protruding part and the stability-enhancing ring plate, but also reduce the resistance suffered by the protruding part during the pile driving process. At the same time, they also have the function of combining with the surrounding soil layer to improve the stability of the precast pile in the soil layer.

[0019] Compared with the prior art, the high-stability precast pile of the present invention has the following advantages:

[0020] The high-stability precast pile described in the present utility model optimizes the precast pile structure from multiple angles by optimizing the hybrid reinforcement mode, increasing the reinforcement ratio, setting enhanced ring plates, and improving the anti-pulling performance device, so as to enhance the vertical bearing capacity, horizontal shear and bending resistance, ductility, and anti-pulling ability of the precast pile, and finally achieve the improvement of the overall stability of the precast pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0022] Figure 1 is a schematic internal structure diagram of the high-stability precast pile described in Embodiment 1 of the present utility model;

[0023] Figure 2 is a schematic external structure diagram of the high-stability precast pile described in Embodiment 1 of the present utility model;

[0024] Figure 3 is a schematic internal transverse sectional view of the high-stability precast pile described in Embodiment 1 of the present utility model;

[0025] Figure 4 is a schematic internal transverse sectional view of the high-stability precast pile described in Embodiment 2 of the present utility model;

[0026] Figure 5 is a schematic internal transverse sectional view of the high-stability precast pile described in Embodiment 3 of the present utility model.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS:

[0028] 1 - Pile body, 2 - Enhanced ring plate, 3 - Stability-enhancing ring plate, 4 - Longitudinal reinforcement, 5 - Circular reinforcement, 6 - Prestressed reinforcement, 7 - Non-prestressed reinforcement, 8 - Protrusion, 9 - Concave groove, 10 - Rib plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0032] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0033] Embodiment 1

[0034] As Figures 1 to 3 shown, a precast pile with high stability includes a pile body 1, end plates installed at the upper and lower ends of the pile body 1, a steel reinforcement cage buried in the pile body 1, a reinforcing ring plate 2 and a stability-enhancing ring plate 3 embedded on the outer side wall of the pile body 1;

[0035] Among them, the steel reinforcement cage includes a plurality of longitudinal steel bars 4 evenly distributed at equal intervals along the circumference and a plurality of hoop steel bars 5 wound and welded on the longitudinal steel bars 4; the steel reinforcement cage is provided with two layers. The longitudinal steel bars 4 of the steel reinforcement cage in the inner circle are a mixed reinforcement structure in which prestressed steel bars 6 and non-prestressed steel bars 7 are arranged at intervals one by one. The longitudinal steel bars 4 of the steel reinforcement cage in the outer circle are arranged in two circles, respectively arranged along the inner and outer circumferences of the hoop steel bars 5. The longitudinal steel bars 4 arranged on the inner circumference are prestressed steel bars 6, and the longitudinal steel bars 4 arranged on the outer circumference are non-prestressed steel bars 7;

[0036] A plurality of annular grooves for embedding the reinforcing ring plates 2 and the stabilizing ring plates 3 are axially distributed on the outer side wall of the pile body 1; there are a plurality of reinforcing ring plates 2 and stabilizing ring plates 3, which are alternately and spaced apart one by one; a circle of protruding parts 8 inserted into the surrounding soil layer is circumferentially arranged on the outer side wall of the stabilizing ring plate 3; the protruding part 8 is of a conical ring structure, and its vertical section gradually becomes smaller in the direction away from the pile body 1; the upper end surface of the protruding part 8 is of a downward concave structure, forming a concave groove 9; a plurality of vertically arranged rib plates 10 are circumferentially spaced apart between the lower end surface of the protruding part 8 and the outer side wall of the stabilizing ring plate 3.

[0037] Embodiment 2

[0038] On the basis of Embodiment 1, the difference from Embodiment 1 is that the structure of the steel reinforcement cage is different, as Figure 4 shown, the steel reinforcement cage is arranged in two layers. The longitudinal steel bars 4 of the steel reinforcement cage located in the inner circle are all prestressed steel bars 6. The longitudinal steel bars 4 of the steel reinforcement cage located in the outer circle are arranged in two circles, respectively arranged along the inner and outer circumferences of the hoop steel bars 5. The longitudinal steel bars 4 arranged in the inner circumference are prestressed steel bars 6, and the longitudinal steel bars 4 arranged in the outer circumference are non-prestressed steel bars 7.

[0039] Embodiment 3

[0040] On the basis of Embodiment 1, the difference from Embodiment 1 is that the structure of the steel reinforcement cage is different, as Figure 5 shown, the steel reinforcement cage is arranged in two layers. The longitudinal steel bars 4 of the steel reinforcement cage located in the inner circle are of a mixed reinforcement structure in which prestressed steel bars 6 and non-prestressed steel bars 7 are alternately arranged. The longitudinal steel bars 4 of the steel reinforcement cage located in the outer circle are arranged in two circles, respectively arranged along the inner and outer circumferences of the hoop steel bars 5. The longitudinal steel bars 4 arranged in the inner and outer circumferences are both of a mixed reinforcement structure in which prestressed steel bars 6 and non-prestressed steel bars 7 are alternately arranged.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precast pile with high stability, comprising a pile body, end plates installed at both upper and lower ends of the pile body, and a steel reinforcement cage buried in the pile body. The steel reinforcement cage includes multiple longitudinal steel bars evenly distributed at equal intervals along the circumference and multiple circular steel bars wound and welded on the longitudinal steel bars, and is characterized in that: The steel reinforcement cage is provided with two layers. The longitudinal steel bars of the steel reinforcement cage located in the inner circle are prestressed steel bars or a mixture of prestressed steel bars and non-prestressed steel bars. The longitudinal steel bars of the steel reinforcement cage located in the outer circle are a mixture of prestressed steel bars and non-prestressed steel bars. It also includes a reinforcing ring plate and a stability-enhancing ring plate embedded on the outer side wall of the pile body. A circle of protruding parts inserted into the surrounding soil is provided along the circumferential direction on the outer side wall of the stability-enhancing ring plate.

2. The high-stability precast pile according to claim 1, wherein: The longitudinal steel bars of the steel reinforcement cage located in the outer circle are arranged in two circles, respectively arranged along the inner and outer circumferences of the circular steel bars.

3. The precast pile with high stability according to claim 2, wherein: The longitudinal steel bars arranged in the inner circumference of the circular steel bars of the steel reinforcement cage located in the outer circle are prestressed steel bars, and the longitudinal steel bars arranged in the outer circumference are non-prestressed steel bars.

4. The high-stability precast pile according to any one of claims 1 to 3, characterized in that: There are multiple of the reinforcing ring plates and the stability-enhancing ring plates, which are alternately and spaced apart one by one.

5. The precast pile with high stability according to claim 4, wherein: A plurality of annular grooves for embedding the reinforcing ring plate and the stability-enhancing ring plate are distributed along the axial direction on the outer side wall of the pile body.

6. The precast pile with high stability according to any one of claims 1 to 3, characterized in that: The protruding part is a ring-conical structure, and its vertical section gradually becomes smaller in the direction away from the pile body.

7. The high-stability precast pile according to claim 6, characterized in that: The upper end surface of the protruding part is of a downwardly concave structure, forming a concave groove.

8. The precast pile with high stability according to claim 6, wherein: Between the lower end surface of the protruding part and the outer side wall of the stability-enhancing ring plate, a plurality of vertically arranged rib plates are distributed at intervals along the circumferential direction.

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