Hard layer immersed tube pile tip

Abstract

The utility model discloses a hard layer immersed tube pile tip, which relates to the technical field of pile foundation treatment, and comprises shaft supports arranged at an opening at the lower end of an immersed tube and comprising two sides of the lower end of the immersed tube, and two material doors positioned at the opening at the bottom end of the immersed tube and rotationally connected to the shaft supports, and the pile tip is positioned below the material door and is fixed on the shaft support, and the pile tip is a cone. The pile tip has the advantages that the pile tip can penetrate through a deep and thick hard layer, damage to the material door due to the fact that the hard layer is difficult to penetrate through can be avoided, and therefore the material door is protected, and the service life of the pile tip is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation treatment technology, and more specifically, it relates to a hard-layer driven pipe pile tip. Background Technology

[0002] Existing driven pipe pile tips, such as the Chinese utility model patent disclosed in patent authorization announcement number CN 210712828 U, disclose a driven pipe pile shoe, which is set at the opening at the lower end of the driven pipe. It includes a first hinge plate, a second hinge plate, a pile tip plate, two hinge plate shaft supports, a hinge plate bushing, and a hinge plate mounting shaft. The two hinge plate shaft supports are fixed to both sides of the lower end of the driven pipe, and the pile tip plate is welded and fixed between the two hinge plate shaft supports. The hinge plate mounting shaft is set between the two hinge plate shaft supports and located above the pile tip plate. The lower ends of the first and second hinge plates are respectively welded to the hinge plate bushings. The first and second hinge plates close upwards and open downwards along the hinge plate mounting shaft. This technical solution adopts a two-lobed hinge structure, which can realize the automatic and smooth closing and opening of the lower opening.

[0003] However, the driven pile shoe provided in this technical solution is only suitable for soft foundation treatment. Currently, foundation reinforcement treatment often encounters geological conditions where the strata contain hard layers of gravel or construction waste. These hard layers have uneven distribution of hardness and significant thickness variations. For such geological conditions, the driving resistance of the driven pile is high, requiring extremely high penetration power from the construction equipment. The existing technical solution uses a pile tip plate. However, when dealing with foundations with such hard layers, this type of tip plate not only fails to penetrate the deeper hard layers but also easily damages the hinge plates when the driven pile encounters hard strata, reducing the service life of the driven pile tip. Utility Model Content

[0004] To address this problem in practical applications, the purpose of this utility model is to propose a hard-layer driven pile tip that can not only penetrate the hard layer but also protect the storage compartment door to extend the service life of the driven pile tip. The specific solution is as follows:

[0005] A hard-layer driven pipe pile tip is set at the lower end opening of the driven pipe, including shaft supports on both sides of the lower end of the driven pipe, two material gates located at the bottom opening of the driven pipe and rotatably connected to the shaft supports, the material gates being rotated to close the opening upwards or open it downwards, and a pile tip located below the material gates and fixed to the shaft supports, the pile tip being a cone.

[0006] Furthermore, the cone is a cylindrical cone.

[0007] Furthermore, the cone is a solid structure.

[0008] Furthermore, the pile tip is made of alloy steel.

[0009] Furthermore, the upper ends of the pile tip are directly welded to the side walls of the two axle supports.

[0010] Furthermore, the pile tip is welded to the shaft support via a connecting block, and the pile tip is either welded to the connecting block or the pile tip and the connecting block are integrally formed.

[0011] Furthermore, it also includes two limiting blocks, which are located between the two material gates and the pile tip, respectively, to limit the downward opening angle of the two material gates.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, the tip of the driven pipe pile is improved to a solid alloy steel conical pile tip. This conical pile tip can not only penetrate a thick hard layer, but also avoid damage to the material gate caused by the inability to penetrate the hard layer, thereby protecting the material gate and extending the service life of the pile tip. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention (when the material gate is closed upwards);

[0015] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention (when the material gate is opened downwards);

[0016] Figure 3 This is a side view of Embodiment 1 of the present utility model;

[0017] Figure 4 This is a schematic diagram showing the overall structure of the limiting block in Embodiment 1 of this utility model;

[0018] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model (when the material gate is closed upwards).

[0019] Attached reference numerals: 1. Submerged tube; 2. Inclined opening; 3. Shaft support; 4. Shaft assembly; 5. Material gate; 6. Pile tip; 7. Connecting block; 8. Limiting block. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] like Figure 1-3 As shown, a hard-layer driven pipe pile tip, located at the lower opening of the driven pipe 1, includes a shaft support 3, a shaft assembly 4, a material gate 5, and a pile tip 6, wherein:

[0023] The lower end of the immersed tube 1 has two oblique openings 2 that are symmetrical about the central axis of the end of the immersed tube 1.

[0024] The shaft supports 3 are located on both sides of the lower end of the immersed tube 1. More specifically, the two shaft supports 3 are symmetrically arranged about the central axis of the immersed tube 1, and each shaft support 3 is located at the intersection of the inclined surfaces between the two inclined openings 2. Preferably, the shaft supports 3 are fixed to the immersed tube 1 by welding or bolting.

[0025] The shaft assembly 4 is horizontally positioned between the two shaft supports 3, and the center of the shaft assembly 4 is located on the vertical surface where the inclined surfaces intersect between the two inclined openings 2.

[0026] The material gate 5 is located at the bottom opening of the submerged tube 1 and is rotatably connected to the shaft support 3 via the shaft assembly 4. The material gate 5 is rotated to close the oblique opening 2 upward or open it downward. More specifically, each material gate 5 is located between two shaft supports 3, and the end face of the material gate 5 matches the oblique opening 2, so that when the two material gates 5 are fully closed upward, the two material gates 5 can completely seal the oblique opening 2 at the bottom of the submerged tube 1.

[0027] In one possible embodiment, the shaft assembly 4 includes an independent rotating shaft (not shown in the figure), which is rotatably connected to two shaft supports 3. One end of the material gate 5 is welded to the rotating shaft to realize the rotation of the material gate 5. At this time, the two material gates 5 rotate synchronously with the rotation of the rotating shaft.

[0028] In another possible embodiment, the shaft assembly 4 includes a mounting shaft and two sets of bushings. The mounting shaft is fixed to the two shaft supports 3 by welding or bolting. The two sets of bushings are respectively fitted onto the mounting shaft. Two material gates 5 are welded onto the two sets of bushings to realize the rotation of the material gates 5. At this time, the two material gates 5 can rotate independently.

[0029] The pile tip 6 is located below the material gate 5 and fixed to the shaft support 3. The pile tip 6 is a cone. The pointed end of the cone faces downward. The cone can be a round cone or a pyramid, preferably a round cone. The cone pile tip 6 not only allows it to easily penetrate the thick hard layer, but also avoids damage to the material gate 5 caused by the inability to penetrate the hard layer.

[0030] In addition, the cone is a solid structure, which enhances its strength and durability, ensuring that it is not easily damaged when driving piles in hard layers.

[0031] The pile tip 6 is made of alloy steel. This material has excellent hardness and wear resistance, and can cope with various complex geological conditions.

[0032] The pile tip 6 is welded to the shaft support 3 via the connecting block 7, which improves the strength and reliability of the connection.

[0033] The pile tip 6 is welded to the connecting block 7 or the pile tip 6 and the connecting block 7 are integrally formed to adapt to different production needs.

[0034] Furthermore, such as Figure 4 As shown, the hard-layer driven pile tip also includes two limiting blocks 8, which are located between the two material gates 5 and the pile tip 6, and are welded to both sides of the connecting block 7, respectively, to limit the downward opening angle of the two material gates 5. The limiting blocks 8 can be an inverted semi-conical plate structure or a straight plate structure that intersects the connecting plate in a cross shape. It should be understood that this application does not limit the shape of the limiting blocks 8, and any structure that can limit the downward opening angle of the material gates 5 can be considered within the protection scope of this application. Preferably, the limiting blocks 8 limit the downward opening angle of the material gates 5 to between 30° and 60°, and the angle can be adjusted according to the actual working conditions.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that: Figure 5 As shown, the upper two sides of the pile tip 6 are directly welded to the side walls of the two shaft supports 3, which can reduce the number of parts and thus reduce the production cost of the pile tip 6 of the driven tube 1. Preferably, the upper two sides of the pile tip 6 are flattened to match the shape of the side walls of the shaft supports 3, which can increase the welding area between the pile tip 6 and the shaft supports 3, thereby improving the installation stability of the two and helping to improve the service life of the pile tip 6.

[0037] At this time, the limiting block 8 can be located at the top of the cone tip 6 to limit the downward opening angle of the material gate 5 and avoid the material gate 5 from being difficult to close later.

[0038] The specific implementation principle of this utility model is as follows:

[0039] When the sinking pipe 1 is driven downward, the two material gates 5 are obstructed by the soil layer and rotate upward until the lower end of the sinking pipe 1 is sealed by the oblique opening 2. During the sinking process of the sinking pipe 1, the cone pile tip 6 breaks the rocks to penetrate the thick hard layer.

[0040] When the immersed tube 1 sinks to the designed depth, it enters the stage of lifting the immersed tube 1. During the upward lifting process, the two material gates 5 are obstructed by the soil layer and rotated downward by the gravity of the crushed stone. The oblique opening 2 at the lower end of the immersed tube 1 is opened, and the crushed stone can fall into the sinking hole. At the same time, due to the action of the limiting block 8, the two material gates 5 cannot be opened downward indefinitely to prevent the subsequent reverse insertion stage from not being able to close smoothly.

[0041] Repeat the above two processes for reverse insertion until the construction is completed, thus completing the hard-layer driven pipe pile construction.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A hard-layer driven pipe pile tip, disposed at the lower end opening of the driven pipe, comprising shaft supports located on both sides of the lower end of the driven pipe, and two material gates located at the bottom opening of the driven pipe and rotatably connected to the shaft supports, wherein the material gates are rotated to close the opening upwards or open it downwards, characterized in that, It also includes a cone-shaped pile tip located below the material gate and fixed to the shaft support.

2. The hard-layer driven pipe pile tip according to claim 1, characterized in that, The cone is a cylindrical cone.

3. The hard-layer driven pipe pile tip according to claim 1, characterized in that, The cone is a solid structure.

4. The hard-layer driven pipe pile tip according to claim 1, characterized in that, The pile tip is made of alloy steel.

5. The hard-layer driven pipe pile tip according to claim 1, characterized in that, The upper ends of the pile tip are directly welded to the side walls of the two axle supports.

6. The hard-layer driven pipe pile tip according to claim 1, characterized in that, The pile tip is welded to the shaft support via a connecting block, and the pile tip is either welded to the connecting block or the pile tip and the connecting block are integrally formed.

7. The hard-layer driven pipe pile tip according to claim 5 or 6, characterized in that, It also includes two limiting blocks, which are located between the two material gates and the pile tip, respectively, to limit the downward opening angle of the two material gates.

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