A precast concrete variable diameter pile foundation

Abstract

The utility model discloses a prefabricated concrete variable diameter pile foundation, including first variable diameter pile foundation and second variable diameter pile foundation, first variable diameter pile foundation, second variable diameter pile foundation distributes upside down, and the outer wall of first variable diameter pile foundation, second variable diameter pile foundation is tangent, the bottom diameter of variable diameter pile body is greater than the outer diameter of variable diameter pile body, first variable diameter pile foundation, second variable diameter pile foundation is connected through the installation mechanism. The utility model discloses through variable diameter design and installation mechanism innovation, has strengthened the pile foundation bearing and stability, has solved traditional pile foundation connection not firm, the problem of insufficient bearing, sets up installation mechanism and reinforcing mechanism, has further promoted the connection intensity and overall stability between the pile foundation, has guaranteed the safe and reliable of building structure, especially applicable to the building engineering under the complex geological condition, has extensive practical value.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete variable diameter pile foundation technology, and in particular to a precast concrete variable diameter pile foundation. Background Technology

[0002] In the field of building construction, pile foundations, as an important foundation structure, bear the crucial task of transferring the load from the superstructure to deep, stable soil or rock layers. With the continuous development of building technology and the increasing height of buildings, higher requirements are placed on the bearing capacity and stability of pile foundations. Precast concrete piles, due to their advantages such as fast construction speed and controllable quality, have been widely used in building construction.

[0003] However, traditional precast concrete pile foundations still have some shortcomings in terms of connection methods and bearing capacity. For example, the connection between piles is often not strong enough, and they are prone to loosening or failure under external forces, thus affecting the stability and safety of the entire building structure. In addition, traditional pile foundations are also inadequate in terms of bearing capacity and deformation resistance when dealing with complex geological conditions. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems by proposing a precast concrete variable diameter pile foundation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precast concrete variable diameter pile foundation includes a first variable diameter pile foundation and a second variable diameter pile foundation, which are distributed vertically and have tangent outer walls. The bottom diameter of the variable diameter pile body is larger than its outer diameter, and the first and second variable diameter pile foundations are connected by an installation mechanism.

[0007] Preferably, the installation mechanism includes an installation groove disposed at the upper end of the second variable diameter pile foundation, a connecting block that mates with the installation groove is fixed at the bottom of the variable diameter pile body, a plurality of first tie bars are installed at the bottom of the connecting block, and a first through hole and a second through hole are provided through the second variable diameter pile foundation, through which concrete can be injected into the installation groove.

[0008] Preferably, the connecting block and the variable diameter pile body are integrally formed by casting, and a fixing rib is provided between the connecting block and the variable diameter pile body.

[0009] Preferably, the first tie rod is located inside the connecting block and the variable diameter pile body, and the first tie rod extends out through the bottom of the connecting block.

[0010] Preferably, the first through hole is located below the second through hole, and the first through hole and the second through hole are arranged opposite to each other on the second variable diameter pile foundation.

[0011] Preferably, the installation mechanism includes an annular groove at the upper end of the second variable diameter pile foundation, and the bottom of the first variable diameter pile foundation is provided with a plurality of second tie bars. When the first variable diameter pile foundation and the second variable diameter pile foundation abut against each other, the second tie bars are located in the annular groove. The second variable diameter pile foundation is provided with a third through hole and a fourth through hole that communicate with the annular groove.

[0012] Preferably, the third through hole is located above the fourth through hole, and concrete is injected into the annular groove through the fourth through hole.

[0013] Preferably, the second tie rod is pre-embedded in the first variable diameter pile foundation, and the end of the second tie rod is bent.

[0014] Preferably, the system further includes a reinforcement mechanism, which includes a connecting ring fitted onto the first variable-diameter pile foundation and the second variable-diameter pile foundation. Each connecting ring is welded with a flange, and the two flanges are connected by a connector.

[0015] Preferably, the connecting ring is tightly fitted to the outer wall of the first variable diameter pile foundation and the second variable diameter pile foundation.

[0016] Compared with the prior art, the advantages of this utility model are as follows:

[0017] 1. By setting up installation grooves and connecting blocks, as well as pre-embedded first or second tie bars, a firm connection between the first and second variable-diameter pile foundations is achieved. This connection method not only ensures the coaxial connection between the pile foundations, but also enhances the stability and tensile strength of the connection through the anchoring effect between the tie bars and the concrete.

[0018] 2. The bottom diameter of the first variable-diameter pile foundation is larger than the outer diameter of the second variable-diameter pile foundation. This variable-diameter design helps to increase the contact area between the pile foundation and the soil layer, thereby improving the bearing capacity of the pile foundation. At the same time, by optimizing the structural design and material selection of the pile foundation, the compressive and shear resistance of the pile foundation is further enhanced.

[0019] 3. It has good adaptability and flexibility, and can be customized according to different geological conditions and engineering needs. By adjusting parameters such as the diameter, length and connection method of the pile foundation, the bearing capacity and stability requirements under different geological conditions can be met.

[0020] 4. A reinforcement mechanism is installed, which tightly connects the two variable-diameter piles together through connecting rings and flanges, further enhancing the overall stability of the pile foundations. This reinforcement mechanism effectively resists external loads and deformations, ensuring the stability and safety of the building structure.

[0021] In summary, this utility model enhances the bearing capacity and stability of pile foundations through variable diameter design and innovative installation mechanism, solving the problems of weak connection and insufficient bearing capacity of traditional pile foundations. The installation and reinforcement mechanisms further improve the connection strength and overall stability between pile foundations, ensuring the safety and reliability of building structures. It is particularly suitable for building projects under complex geological conditions and has broad practical value. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a precast concrete variable diameter pile foundation proposed in Example 1;

[0023] Figure 2 This is a split view of a precast concrete variable diameter pile foundation proposed in Example 1;

[0024] Figure 3 This is a cross-sectional view of a precast concrete variable diameter pile foundation proposed in Example 1;

[0025] Figure 4 This is a schematic diagram of a precast concrete variable diameter pile foundation proposed in Example 2;

[0026] Figure 5 This is a schematic diagram of a precast concrete variable diameter pile foundation proposed in Example 3.

[0027] In the figure: 1 First variable diameter pile foundation, 2 Second variable diameter pile foundation, 3 Installation groove, 4 Connecting block, 5 First tie rod, 6 First through hole, 7 Second through hole, 8 Second tie rod, 9 Third through hole, 10 Fourth through hole, 11 Connecting ring, 12 Flange, 13 Connecting piece, 14 Annular groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1

[0030] Reference Figures 1-3 A precast concrete variable-diameter pile foundation includes a first variable-diameter pile foundation 1 and a second variable-diameter pile foundation 2, which are distributed vertically and whose outer walls are tangent. The bottom diameter of the first variable-diameter pile foundation 1 is larger than the outer diameter of the second variable-diameter pile foundation 2. This design helps to enhance the bearing capacity and stability of the pile foundation. The first variable-diameter pile foundation 1 and the second variable-diameter pile foundation 2 are connected by an installation mechanism. The installation mechanism includes an installation groove 3 set at the upper end of the second variable-diameter pile foundation 2. The size and shape of the installation groove 3 match the connecting block 4 to ensure the accuracy and stability of the connection.

[0031] The bottom of the first variable-diameter pile foundation 1 is fixed with a connecting block 4 that mates with the mounting groove 3. The connecting block 4 and the first variable-diameter pile foundation 1 are integrally formed by casting. This integral forming design can greatly enhance the connection strength between the two. A fixing bar is provided between the connecting block 4 and the first variable-diameter pile foundation 1. The addition of the fixing bar can further improve the stability of the connection and prevent relative displacement between the connecting block 4 and the first variable-diameter pile foundation 1.

[0032] Multiple first tie rods 5 are installed at the bottom of the connecting block 4. The first tie rods 5 are located inside the connecting block 4 and the first variable diameter pile 1, and extend out through the bottom of the connecting block 4. The extended part of the first tie rod 5 helps to form a good anchoring effect with the concrete in the installation groove 3. The second variable diameter pile 2 is provided with a first through hole 6 and a second through hole 7. The first through hole 6 is located below the second through hole 7, and the two are set opposite to each other on the second variable diameter pile 2. This design facilitates the injection of concrete from below and the discharge of air and excess concrete from above. Concrete is injected into the installation groove 3 through the first through hole 6 until the concrete is discharged into the second through hole 7. After the concrete solidifies, it can firmly fix the connecting block 4 and the first tie rods 5 in the installation groove 3, forming a stable connection.

[0033] Example 2

[0034] Reference Figure 4 The difference between this embodiment and Embodiment 1 is that the installation mechanism in this embodiment includes an annular groove 14 disposed at the upper end of the second variable diameter pile foundation 2. The design of the annular groove 14 provides good accommodation space for the second tie rod 8. Multiple second tie rods 8 are provided at the bottom of the first variable diameter pile foundation 1. The second tie rods 8 are pre-embedded in the first variable diameter pile foundation 1, and the ends of the second tie rods 8 are bent. This bent design can enhance the anchoring effect between the second tie rods 8 and the concrete.

[0035] When the first variable-diameter pile 1 and the second variable-diameter pile 2 abut against each other, the second tie rod 8 is located within the annular groove 14, forming a tight connection between the second tie rod 8 and the concrete within the annular groove 14. The second variable-diameter pile 2 is perforated with a third through hole 9 and a fourth through hole 10, both communicating with the annular groove 14. The third through hole 9 is located above the fourth through hole 10. Concrete is injected into the annular groove 14 through the fourth through hole 10, fully filling the groove and firmly fixing the second tie rod 8 within it. After the concrete solidifies, it further improves the stability of the installation of the first variable-diameter pile 1 and the second variable-diameter pile 2, ensuring the overall performance of the pile foundations.

[0036] Example 3

[0037] Reference Figure 5The difference between this embodiment and embodiments 1 and 2 is that this embodiment also includes a reinforcement mechanism. The reinforcement mechanism includes a connecting ring 11 fitted onto the first variable diameter pile 1 and the second variable diameter pile 2. The design of the connecting ring 11 provides additional support and reinforcement for the pile foundation. A flange 12 is welded onto each connecting ring 11. The addition of the flange 12 facilitates the tight connection of the two flanges 12 together through the connector 13.

[0038] Two flanges 12 are connected by a connector 13, which can be a bolt, nut, or other fastener. This fastener securely connects the two flanges 12 together, thereby enhancing the overall stability of the pile foundation. A connecting ring 11 is tightly fitted against the outer wall of the first variable-diameter pile 1 and the second variable-diameter pile 2, ensuring that the connecting ring 11 can fully exert its reinforcing effect. This reinforcement mechanism design can further improve the bearing capacity and deformation resistance of the pile foundation, ensuring its stability and safety under complex geological conditions.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precast concrete variable diameter pile foundation, comprising a first variable diameter pile foundation (1) and a second variable diameter pile foundation (2), characterized in that, The first variable diameter pile foundation (1) and the second variable diameter pile foundation (2) are distributed vertically, and the outer walls of the first variable diameter pile foundation (1) and the second variable diameter pile foundation (2) are tangent to each other. The bottom diameter of the first variable diameter pile foundation (1) is larger than the outer diameter of the second variable diameter pile foundation (2). The first variable diameter pile foundation (1) and the second variable diameter pile foundation (2) are connected by an installation mechanism.

2. The precast concrete variable diameter pile foundation according to claim 1, characterized in that, The installation mechanism includes an installation groove (3) set at the upper end of the second variable diameter pile foundation (2), a connecting block (4) that cooperates with the installation groove (3) is fixed at the bottom of the first variable diameter pile foundation (1), a plurality of first tie bars (5) are installed at the bottom of the connecting block (4), and a first through hole (6) and a second through hole (7) are provided through the second variable diameter pile foundation (2), and concrete can be injected into the installation groove (3) through the first through hole (6).

3. A precast concrete variable diameter pile foundation according to claim 2, characterized in that, The connecting block (4) and the first variable diameter pile foundation (1) are integrally formed by casting, and a fixing bar is provided between the connecting block (4) and the first variable diameter pile foundation (1).

4. A precast concrete variable diameter pile foundation according to claim 2, characterized in that, The first tie bar (5) is located inside the connecting block (4) and the first variable diameter pile (1), and the first tie bar (5) extends out through the bottom of the connecting block (4).

5. A precast concrete variable diameter pile foundation according to claim 2, characterized in that, The first through hole (6) is located below the second through hole (7), and the first through hole (6) and the second through hole (7) are set opposite to each other on the second variable diameter pile foundation (2).

6. A precast concrete variable diameter pile foundation according to claim 1, characterized in that, The installation mechanism includes an annular groove (14) set at the upper end of the second variable diameter pile foundation (2). The bottom of the first variable diameter pile foundation (1) is provided with a plurality of second tie bars (8). When the first variable diameter pile foundation (1) and the second variable diameter pile foundation (2) abut against each other, the second tie bars (8) are located in the annular groove (14). The second variable diameter pile foundation (2) is provided with a third through hole (9) and a fourth through hole (10) that are connected to the annular groove (14).

7. A precast concrete variable diameter pile foundation according to claim 6, characterized in that, The third through hole (9) is located above the fourth through hole (10), and concrete is injected into the annular groove (14) through the fourth through hole (10).

8. A precast concrete variable diameter pile foundation according to claim 6, characterized in that, The second tie rod (8) is embedded in the first variable diameter pile foundation (1), and the end of the second tie rod (8) is bent.

9. A precast concrete variable diameter pile foundation according to claim 1, characterized in that, It also includes a reinforcement mechanism, which includes a connecting ring (11) fitted on the first variable diameter pile foundation (1) and the second variable diameter pile foundation (2). Each connecting ring (11) is welded with a flange (12), and the two flanges (12) are connected by a connector (13).

10. A precast concrete variable diameter pile foundation according to claim 9, characterized in that, The connecting ring (11) is tightly attached to the outer wall of the first variable diameter pile foundation (1) and the second variable diameter pile foundation (2).

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