A pile body enlarged body precast pile

Abstract

The utility model discloses a pile body enlarging body prefabricated pile relates to prefabricated pile technical field. The utility model discloses, including reinforcement cage body and the concrete pile body of pouring on its surface, the surface of reinforcement cage body and located the bottom end at concrete pile body pours and has concrete expansion petal body, the top of concrete expansion petal body and the bottom end of concrete pile body is connected with the deformation metal ring. The utility model discloses, and reinforcement cage body provides tensile strength for whole structure, and the surface pours concrete pile body and forms the main body structure of stake, when reaching the predetermined depth after piling, the expansion mechanism set up in the inside of pile body exerts the pressure to the downside, and the pressure is passed to concrete expansion petal body, owing to the deformation metal ring connection between concrete expansion petal body top and concrete pile body bottom, and it can deform to allow concrete expansion petal body to spread out radially outward, and finally forms an enlarged head at the bottom of concrete pile body, and the end bearing area and side friction of stake are increased significantly.

Description

Technical Field

[0001] This utility model relates to the field of precast pile technology, specifically to a precast pile with an enlarged pile body. Background Technology

[0002] In existing pile foundation projects, the commonly used precast piles, with their ordinary diameter, require increased pile length or the use of larger diameter piles in soft soil layers or situations with high bearing requirements. However, the pile diameter is limited by transportation and construction equipment. In-situ enlarged piles or cast-in-place piles in soft soil layers require on-site casting or soil improvement, resulting in long construction cycles and high costs. Ordinary precast piles do not make full use of side friction resistance, and the overall bearing capacity improvement is limited.

[0003] Therefore, a precast pile with an enlarged pile body is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a precast pile with an enlarged pile body in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A precast pile with an enlarged body includes a steel cage and a concrete pile body cast on its surface. A concrete enlarged petal is cast on the surface of the steel cage and at the bottom end of the concrete pile body. A deformable metal ring is connected between the top end of the concrete enlarged petal and the bottom end of the concrete pile body. An enlargement mechanism is provided on the inner wall of the steel cage. Pressure is applied to the enlargement mechanism to unfold the concrete enlarged petal.

[0006] Furthermore, a top metal ring is fixedly fitted on the top of the concrete pile body, and the top metal ring is welded to the end of the reinforcing cage.

[0007] Furthermore, both the steel cage and the deformable metal ring can deform to facilitate the unfolding of the concrete expansion petals.

[0008] Furthermore, the expanding mechanism includes a limiting metal ring fixedly installed on the inner wall of the concrete pile body, an expanding cone block is movably inserted into the limiting metal ring block, and a limiting block is fixedly installed at the top of the expanding cone block.

[0009] Furthermore, the inner wall of the concrete enlarged petal is provided with an arc-shaped wedge surface, which is fitted to the enlarged cone block.

[0010] Furthermore, the large-head diameter of the enlarged cone is smaller than the diameter of the concrete pile body, but larger than the maximum diameter of the arc-shaped wedge surface.

[0011] The beneficial effects of this utility model are as follows: The reinforcing cage provides tensile strength for the entire structure, and the concrete pile body poured on its surface forms the main structure of the pile. When the pile reaches the predetermined depth, the enlarging mechanism set inside the pile body applies downward pressure, which is transmitted to the concrete enlarging petals. Since the deformable metal ring is connected between the top of the concrete enlarging petal and the bottom of the concrete pile body, it can deform, thereby allowing the concrete enlarging petal to expand outward radially, and finally forming an enlarged head at the bottom of the concrete pile body, which significantly increases the end bearing area and side friction resistance of the pile. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a front sectional view of the present invention; Figure 4 This is a partial exploded view of this utility model; Reference numerals: 1. Reinforcing cage; 2. Concrete pile body; 3. Top metal ring; 4. Concrete enlarging petal; 41. Arc-shaped wedge surface; 5. Deformable metal ring; 6. Enlarging mechanism; 601. Limiting metal ring; 602. Enlarging cone block; 603. Limiting block. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0016] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figures 1 to 4 As shown, a precast pile with an enlarged body includes a steel cage 1 and a concrete pile body 2 cast on its surface. A concrete enlarged petal 4 is cast on the surface of the steel cage 1 and at the bottom end of the concrete pile body 2. A deformable metal ring 5 is connected between the top end of the concrete enlarged petal 4 and the bottom end of the concrete pile body 2. An enlargement mechanism 6 is provided on the inner wall of the steel cage 1. Pressure is applied to the enlargement mechanism 6 to unfold the concrete enlarged petal 4. like Figure 2 , Figure 3 , Figure 4 As shown, specifically, the expanding mechanism 6 includes a limiting metal ring 601 fixedly installed on the inner wall of the concrete pile body 2, an expanding cone 602 movably inserted into the limiting metal ring 601, and a limiting block 603 fixedly installed at the top of the expanding cone 602.

[0018] More specifically, when downward pressure is applied to the steel cage 1 during construction, the expanding cone 602 moves upward under the constraint of the limiting metal ring 601. Due to the cone-shaped structure of the expanding cone 602, it will squeeze the surrounding concrete expanding petals 4 during its movement, forcing them to expand radially.

[0019] In some practical applications, the inner wall of the concrete enlarged flap 4 is provided with an arc-shaped wedge surface 41, which is fitted to the enlarged cone block 602.

[0020] More specifically, the inner wall of the concrete expanding petal 4 is pre-cut with an arc-shaped wedge surface 41 at a specific angle, which fits closely with the conical surface of the expanding cone 602. When the expanding cone 602 moves, its conical surface interacts with the arc-shaped wedge surface 41, efficiently converting the downward linear motion into a radial component force that causes the concrete expanding petal 4 to expand outward, thus ensuring the smoothness and effectiveness of the expansion process.

[0021] In some practical applications, the large-head diameter of the enlarged cone 602 is smaller than the diameter of the concrete pile body 2, but larger than the maximum diameter of the arc-shaped wedge surface 41.

[0022] More specifically, by enlarging the diameter of the large head of the cone 602 to be greater than the maximum diameter of the arc-shaped wedge surface 41, the movement of the enlarged cone 602 forces the concrete enlarged petal 4 to unfold.

[0023] In practical applications, a top metal ring 3 is fixedly fitted on the top of the concrete pile body 2, and the top metal ring 3 is welded to the end of the reinforcing cage 1.

[0024] More specifically, the top metal ring 3 at the top of the concrete pile body 2 prevents the top of the concrete pile body 2 from cracking when it is subjected to the impact force of the pile driver.

[0025] In some practical applications, both the reinforcing cage 1 and the deformable metal ring 5 can deform to facilitate the unfolding of the concrete expansion petals 4.

[0026] More specifically, when subjected to vertical pressure from the expanding mechanism 6, the steel cage 1 and the deformable metal ring 5 first undergo yielding deformation, releasing the radial constraint on the concrete expanding petal 4 and providing space and deformation conditions for the concrete expanding petal 4 to expand outward.

[0027] In summary: The steel cage 1 provides tensile strength for the entire structure, and the concrete pile body 2 cast on its surface forms the main structure of the pile. When the pile reaches the predetermined depth, the expansion mechanism 6 set inside the pile body applies downward pressure, which is transmitted to the concrete expansion petal 4. Since the deformable metal ring 5 is connected between the top of the concrete expansion petal 4 and the bottom of the concrete pile body 2, it can deform, thereby allowing the concrete expansion petal 4 to expand outward radially, and finally forming an enlarged head at the bottom of the concrete pile body 2, which significantly increases the end bearing area and side friction resistance of the pile.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precast pile with an enlarged shaft, characterized in that, The structure includes a steel cage (1) and a concrete pile body (2) cast on its surface. A concrete enlarged petal (4) is cast on the surface of the steel cage (1) and at the bottom of the concrete pile body (2). A deformable metal ring (5) is connected between the top of the concrete enlarged petal (4) and the bottom of the concrete pile body (2). An enlargement mechanism (6) is provided on the inner wall of the steel cage (1). Pressure is applied to the enlargement mechanism (6) to unfold the concrete enlarged petal (4).

2. The precast pile with enlarged shaft according to claim 1, characterized in that, The top of the concrete pile body (2) is fixedly fitted with a top metal ring (3), and the top metal ring (3) is welded to the end of the steel cage (1).

3. A precast pile with an enlarged shaft according to claim 1, characterized in that, Both the steel cage (1) and the deformable metal ring (5) can be deformed to facilitate the unfolding of the concrete expansion petals (4).

4. A precast pile with an enlarged shaft according to claim 1, characterized in that, The expanding mechanism (6) includes a limiting metal ring (601) fixedly installed on the inner wall of the concrete pile body (2), an expanding cone (602) is movably inserted into the limiting metal ring (601), and a limiting block (603) is fixedly installed at the top of the expanding cone (602).

5. A precast pile with an enlarged shaft according to claim 4, characterized in that, The inner wall of the concrete enlarged petal (4) is provided with an arc-shaped wedge surface (41), which is fitted to the enlarged cone block (602).

6. A precast pile with an enlarged shaft according to claim 5, characterized in that, The large-head diameter of the enlarged cone (602) is smaller than the diameter of the concrete pile body (2), but larger than the maximum diameter of the arc-shaped wedge (41).

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