Prefabricated pipe pile facilitating carrier pile construction

Abstract

The utility model relates to a kind of prefabricated pipe piles facilitating carrier pile construction, including prefabricated pipe body, the lower pile body lateral wall of prefabricated pipe body is uniformly spaced and is set with filler extrusion hole along its circumference, and the filler extrusion hole is through the inside and outside of prefabricated pipe body;The filler extrusion hole is provided with the one-way valve that can be opened from inside to outside;The filler extrusion hole and one-way valve of the lower pile body circumferentially arranged in the prefabricated pipe body of the application cooperate with each other, in addition to not affecting the normal sinking pile operation of prefabricated pipe body, but also can open additional extrusion passage along the lower circumferential setting of prefabricated pipe body for the filler of internal ramming when carrier pile construction is carried out by means of the prefabricated pipe body, so that the lower circumferential of prefabricated pipe body is wrapped by filler simultaneously, i. E. The ramming expansion body formed by filler can wrap the lower end of prefabricated pipe body, and the carrier pile formed in this way has higher uplift bearing capacity, and can solve the problem of low uplift bearing capacity of existing carrier pile.

Description

Technical Field

[0001] This utility model relates to the field of carrier pile construction technology, and specifically to a precast pipe pile that facilitates carrier pile construction. Background Technology

[0002] The carrier pile is formed by ramming filling material inside the precast pipe pile to form a rammed and expanded body at the pile end. The structure formed by the rammed and expanded body and the precast pipe pile structure not only compacts the soil around the pile, but also significantly increases the load-bearing area at the pile end of the precast pipe pile, thereby greatly improving the vertical bearing capacity of the pile foundation.

[0003] However, given that the rammed and expanded body is located at the pile end, the connection interface between the precast pipe pile body and the rammed and expanded body is easily damaged when subjected to upward pulling forces such as buoyancy. Due to this weak link, the overall design value of the pull-out bearing capacity of the carrier pile is usually low after the construction is completed. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a precast pipe pile that is easy to construct as a carrier pile, thus solving the problem of low pull-out bearing capacity of carrier piles in the prior art.

[0005] To achieve the above objectives, this utility model provides a precast pipe pile that facilitates the construction of carrier piles, including a precast pipe body. The lower part of the pile body sidewall of the precast pipe body is provided with filler extrusion holes evenly distributed along its circumference, and the filler extrusion holes penetrate the inner and outer sides of the precast pipe body.

[0006] The filler extrusion hole is equipped with a one-way valve that can be opened from the inside to the outside. This valve is used to prevent soil from entering the pile through the filler extrusion hole during the precast pipe pile driving process, and to allow the filler to be extruded outward through the filler extrusion hole during the compaction of the carrier pile.

[0007] By adopting this technical solution, the filler extrusion holes and one-way valves arranged around the lower part of the precast pipe pile body work together. In addition to not affecting the normal pile driving operation of the precast pipe body, it can also open additional extrusion channels along the lower circumference of the precast pipe body for the internally compacted filler when using the precast pipe body for carrier pile construction. This allows the lower circumference of the precast pipe body to be simultaneously wrapped by the filler, that is, the rammed and expanded body formed by the filler can wrap around the lower end of the precast pipe body. The carrier pile formed in this way has a higher pull-out bearing capacity, which can solve the problem of low pull-out bearing capacity of existing carrier piles.

[0008] Furthermore, a ring of filler extrusion holes evenly spaced along the circumference of the side wall of the precast pipe body constitutes a group;

[0009] The precast pipe body has multiple sets of filler extrusion holes along the height of the lower pile body, and the positions of adjacent filler extrusion holes in adjacent sets are staggered.

[0010] By adopting this technical solution, increasing the filler extrusion holes in the height direction can improve the coverage height of the filler extrusion during the construction of the carrier pile, thereby further improving the pull-out bearing capacity of the formed carrier pile; the staggered setting of adjacent filler extrusion holes can reduce the impact of setting a large number of filler extrusion holes on the strength of the precast pipe.

[0011] Furthermore, the filler extrusion hole is the internal cavity of the pre-embedded steel pipe;

[0012] The embedded steel pipe is connected to the reinforcing cage of the precast pipe body and is fixed inside its side wall by the precast integral casting along with the precast pipe body.

[0013] By adopting this technical solution, the pre-embedded steel pipe forms the filler extrusion hole, which can compensate for the impact of direct drilling on the structural strength of the precast pipe body; the connection between the pre-embedded steel pipe and the reinforcing cage of the precast pipe body can ensure the stability of the overall precast structure.

[0014] Furthermore, the one-way valve is connected to one end of the pre-embedded steel pipe that extends through the inside of the precast pipe body sidewall.

[0015] By adopting this technical solution, placing the one-way valve at the end of the pre-embedded steel pipe that protrudes from the side wall of the precast pipe can completely prevent soil from entering the interior of the pre-embedded steel pipe during pile driving.

[0016] Furthermore, the one-way valve is a flap structure that is hinged to the pre-embedded steel pipe and can cover the internal cavity of the pre-embedded steel pipe. Its hinge position is located on the lower side of the end of the pre-embedded steel pipe, and there is damping at the hinge position.

[0017] By adopting this technical solution, the flap structure with the hinged position located on the lower side of the end of the pre-embedded steel pipe has the ability to flip up and down. In addition to automatically closing and improving the closing effect on the pre-embedded steel pipe through soil pressure during the precast pipe pile driving, it can also be opened outward under pressure when the filling material is extruded, achieving a complementary effect with the two construction steps. The damping setting at the hinged position is to avoid the problem of the flap structure of the one-way valve failing to close the pre-embedded steel pipe due to its own weight when the pile driving just begins.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] The filler extrusion holes and one-way valves arranged around the lower part of the precast pipe body work together to not only avoid affecting the normal pile driving operation of the precast pipe body, but also to open additional extrusion channels along the lower circumference of the precast pipe body for the internally compacted filler when using the precast pipe body for carrier pile construction. This allows the lower circumference of the precast pipe body to be simultaneously wrapped by the filler, meaning that the rammed and expanded body formed by the filler can wrap around the lower end of the precast pipe body. The carrier pile formed in this way has a higher pull-out bearing capacity, which can solve the problem of low pull-out bearing capacity of existing carrier piles. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the precast pipe pile of this utility model, which facilitates the construction of carrier piles.

[0021] Figure 2 for Figure 1 Schematic diagram of the sectional view along the central AA direction;

[0022] Figure 3 This is a schematic diagram of the location of the extrusion hole in the precast pipe pile of this utility model, which facilitates the construction of carrier piles;

[0023] Figure 4 This is a schematic diagram showing the completion of the carrier pile construction.

[0024] Explanation of reference numerals in the attached drawings: 1. Precast pipe body; 2. Packing extrusion hole; 3. Check valve; 4. Embedded steel pipe; 5. Rammer body. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to the appendix. Figure 1 and 3 This utility model provides a precast pipe pile that facilitates the construction of carrier piles, including a precast pipe body 1. The lower part of the pile body side wall of the precast pipe body 1 is provided with filler extrusion holes 2 evenly distributed along its circumference, and the filler extrusion holes 2 penetrate the inner and outer sides of the precast pipe body 1. A one-way valve 3 that can be opened from the inside to the outside is provided at the filler extrusion hole 2 to prevent soil from entering the pile through the filler extrusion hole 2 during the pile driving process of the precast pipe pile, and to allow the filler to be extruded outward from the filler extrusion hole 2 when the filler is tamped during the construction of the carrier pile.

[0027] The filler extrusion holes 2 and one-way valves 3 arranged circumferentially around the lower part of the precast pipe body 1 work together to not only avoid affecting the normal pile driving operation of the precast pipe body 1, but also to open additional extrusion channels along the lower circumference of the precast pipe body 1 for the internally compacted filler during the construction of the carrier pile using the precast pipe body 1. This allows the lower circumference of the precast pipe body 1 to be simultaneously wrapped by the filler, that is, the rammed and expanded body 5 formed by the filler can wrap around the lower end of the precast pipe body 1, as shown in the attached figure. Figure 4As shown, the carrier piles formed in this way have higher tensile strength, which can solve the problem of low tensile strength of existing carrier piles.

[0028] Please see the appendix Figure 1 A ring of filler extrusion holes 2 evenly spaced along the circumference of the side wall of the precast pipe body 1 constitutes a group; multiple groups of filler extrusion holes 2 are provided in the height direction of the lower pile body of the precast pipe body 1, and the positions of adjacent filler extrusion holes 2 in adjacent groups are staggered; increasing the filler extrusion holes 2 in the height direction can increase the coverage height of the filler extrusion during the construction of the carrier pile, thereby further improving the pull-out bearing effect of the formed carrier pile; the staggered arrangement of adjacent filler extrusion holes 2 can reduce the impact of setting a large number of filler extrusion holes 2 on the strength of the precast pipe body 1.

[0029] Please see the appendix Figure 3 The filler extrusion hole 2 is the internal cavity of the pre-embedded steel pipe 4. The filler extrusion hole 2 is formed by the pre-embedded steel pipe 4, which can compensate for the impact of direct opening on the structural strength of the precast pipe body 1. The pre-embedded steel pipe 4 is connected to the reinforcing cage of the precast pipe body 1 and is fixed inside its side wall during the precast integral casting of the precast pipe body 1. The connection between the pre-embedded steel pipe 4 and the reinforcing cage of the precast pipe body 1 can ensure the stability of the overall precast structure.

[0030] Furthermore, the one-way valve 3 is connected to one end of the pre-embedded steel pipe 4 that protrudes from the inside of the side wall of the precast pipe body 1; this can completely prevent the soil from entering the interior of the pre-embedded steel pipe 4 when the precast pipe body 1 is driven into the pile.

[0031] Furthermore, the one-way valve 3 is a flap structure hinged to the pre-embedded steel pipe 4 and capable of covering the internal cavity of the pre-embedded steel pipe 4. Its hinge position is located on the lower side of the end of the pre-embedded steel pipe 4, and there is damping at the hinge position. The flap structure with the hinge position on the lower side of the end of the pre-embedded steel pipe 4 has the ability to flip up and down. In addition to automatically closing and improving the closing effect on the pre-embedded steel pipe 4 by soil pressure when the precast pipe body 1 is driven into the pile, it can also be opened outward under pressure when the filler is extruded, achieving a complementary effect with the two construction steps. The damping setting at the hinge position is to avoid the problem that the flap structure of the one-way valve 3 will fail to close the pre-embedded steel pipe 4 due to its own weight when the pile driving just begins.

[0032] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A precast pipe pile facilitating construction of a carrier pile, comprising a precast pipe body, characterized in that: The lower pile sidewall of the precast pipe body is provided with filler extrusion holes evenly distributed around its circumference, and the filler extrusion holes penetrate the inner and outer sides of the precast pipe body. The filler extrusion hole is equipped with a one-way valve that can be opened from the inside to the outside. This valve is used to prevent soil from entering the pile through the filler extrusion hole during the precast pipe pile driving process, and to allow the filler to be extruded outward through the filler extrusion hole during the compaction of the carrier pile.

2. The precast pipe pile for facilitating construction of a pile carrier according to claim 1, characterized in that: A ring of filler extrusion holes, evenly spaced along the circumference of the sidewall of the precast pipe, constitutes a group. The precast pipe body has multiple sets of filler extrusion holes along the height of the lower pile body, and the positions of adjacent filler extrusion holes in adjacent sets are staggered.

3. A precast pipe pile for facilitating construction of a pile shaft in accordance with claim 2, wherein: The filler extrusion hole is the internal cavity of the pre-embedded steel pipe; The embedded steel pipe is connected to the reinforcing cage of the precast pipe body and is fixed inside its side wall by the precast integral casting along with the precast pipe body.

4. The precast pipe pile for easy construction of carrier piles according to claim 3, characterized in that: The one-way valve is connected to one end of the pre-embedded steel pipe that protrudes from the inside of the side wall of the precast pipe body.

5. A precast pipe pile for facilitating construction of a pile shaft in accordance with claim 4, wherein: The one-way valve is a flap structure that is hinged to the pre-embedded steel pipe and can cover the internal cavity of the pre-embedded steel pipe. Its hinge position is located on the lower side of the end of the pre-embedded steel pipe, and there is damping at the hinge position.

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