A prefabricated pile with high bearing capacity

Abstract

The utility model provides a high-bearing capacity prefabricated pile, belonging to the technical field of prefabricated piles; comprising: a first pile body; a second pile body, arranged on the top of the first pile body; two grouting channels, arranged in the first pile body and the second pile body, the two grouting channels are symmetrically arranged. The utility model can grout cement slurry into the soil layer by setting the grouting channel, and then form a strong and uniform spray in the pile bottom and the soil around the pile through the grouting part, effectively penetrate into the gaps between soil particles, increase the lateral surface area of ​​the pile body and the soil, improve the lateral resistance, and at the same time improve the end resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated piles, in particular to a prefabricated pile with high bearing capacity. Background Art

[0002] Prestressed concrete precast piles are a type of precast pile with a special cross-sectional design. Their characteristic is that the pile body has multiple "bamboo nodes" like bamboo. This structure makes it superior to traditional pipe piles in terms of friction resistance and pull-out resistance.

[0003] At present, the existing precast piles are inserted into clay or other soft soil layers. Clay and other soft soil layers usually have a low degree of consolidation, which means that their initial bearing capacity is not high and they are prone to large volume changes and compression under load, resulting in increased sinking of the precast piles, affecting the stability and safety of the superstructure. Therefore, the present application provides a high-bearing-capacity precast pile to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a prefabricated pile with high bearing capacity to solve the problem that the existing prefabricated pile is fixed only by the squeezing force of the surrounding soil layer, which affects the stability of the prefabricated pile.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A high-bearing capacity prefabricated pile comprises: a first pile body; a second pile body arranged on the top of the first pile body; and two grouting channels arranged in the first pile body and the second pile body, wherein the two grouting channels are symmetrically arranged.

[0007] It also includes: a guide groove, which is arranged at the bottom of the first pile body; and the guide groove is connected to the grouting channel.

[0008] It also includes: the guide groove gradually expands toward the edge of the first pile body along the grouting channel.

[0009] It also includes: a cavity, which is arranged in the first pile body and the second pile body; the first pile body and the second pile body cooperate to form a rectangular or trapezoidal recess.

[0010] It also includes: the first pile body can be set in a square or round shape; the second pile body can be set in a square or round shape.

[0011] It also includes: two grouting parts, which are connected and arranged on the second pile body, are symmetrically arranged, and one side of the grouting part extends into the second pile body and is connected to the grouting channel. The grouting part includes: an expansion and contraction pipe, which is connected and arranged on the second pile body and is connected to the grouting channel; and a stabilizing pipe, which is connected and arranged on the expansion and contraction pipe.

[0012] It also includes: an expansion pipe, which is connected to the stable pipe; and a nozzle part, which is connected to the expansion pipe.

[0013] It also includes: the nozzle part includes: a nozzle body, which is connected and arranged on the expansion tube; a blocking piece, which is slidably arranged in the nozzle body; and a tension spring, which is arranged in the nozzle body.

[0014] It also includes: a plurality of spray holes, which are arranged on the nozzle body; and the size of the blocking sheet is larger than the size of the spray holes.

[0015] It also includes: one side of each tension spring is fixedly connected to the outer side of the inner cavity of the nozzle body, and the other side is fixedly connected to the outer side of the blocking plate, and each tension spring is perpendicular to the outer side of the blocking plate connected thereto.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, by setting up a grouting channel, cement slurry can be grouted into the soil layer, and then a strong and uniform spray is formed in the soil at the bottom of the pile and around the pile through the grouting part, which effectively penetrates into the gaps between soil particles, increases the lateral surface area of ​​the pile body and the soil, improves the lateral resistance, and can also improve the end resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of precast piles with high bearing capacity;

[0020] Figure 2 is a cross-sectional view of the first pile structure;

[0021] Figure 3 This is a bottom view of the bottom column structure;

[0022] Figure 4 It is a schematic diagram of the grouting part structure;

[0023] Figure 5 This is a cross-sectional view of the nozzle structure.

[0024] [reference numerals]

[0025] 1. First pile body; 2. Second pile body; 3. Grouting channel; 4. Grouting part; 5. Cavity; 6. Guide groove; 41. Expander tube; 42. Stabilizing tube; 43. Expansion tube; 44. Nozzle part; 441. Nozzle body; 442. Tension spring; 443. Spray hole; 444. Blocking plate.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0027] The following is a detailed description of a high-bearing capacity prefabricated pile provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0028] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a high-bearing capacity precast pile, comprising: a first pile body 1; a second pile body 2, arranged on the top of the first pile body 1; two grouting channels 3, arranged in the first pile body 1 and the second pile body 2, and the two grouting channels 3 are symmetrically arranged. By setting the grouting channels 3, after the precast pile is hammered into the ground, cement slurry can be injected into the soil layer to reinforce the precast pile.

[0029] like Figure 3 As shown, it also includes: a guide groove 6, which is arranged at the bottom of the first pile body 1; and the guide groove 6 is connected to the grouting channel 3. By providing the guide groove 6, the cement slurry can be guided to move outwards without blocking the grouting channel 3.

[0030] like Figure 3 As shown, the guide groove 6 gradually expands along the grouting channel 3 toward the edge of the first pile body 1. By setting the guide groove 6 to gradually expand, it gradually widens from the grouting channel 3 to the pile end to reduce fluid resistance and promote rapid and uniform diffusion of cement slurry.

[0031] like Figure 2As shown, it also includes: a cavity 5, which is arranged in the first pile body 1 and the second pile body 2; the first pile body 1 and the second pile body 2 cooperate to form a rectangular or trapezoidal recess. By arranging the first pile body 1 and the second pile body 2 to cooperate with each other, an enhanced structural stability and lateral resistance effect can be formed, so that when the pile body is subjected to lateral force, it can more effectively disperse and transmit the force to the bottom soil through its shape change, thereby enhancing the ability of the pile body to resist lateral thrust; by arranging the trapezoidal recess, in the process of the pile body being driven into the soil, the trapezoidal recess can produce a squeezing effect on the surrounding soil, promote the rearrangement and close contact between soil particles, especially when combined with cement slurry injection, these trapezoidal areas can be more fully filled to form a more solid cement-soil composite, thereby enhancing the bonding force between the pile body and the soil.

[0032] like Figure 1 As shown, it also includes: a first pile body 1, which can be set in a square or round shape; a second pile body 2, which can be set in a square or round shape. By setting the first pile body 1 in a square shape, square piles may be easier to arrange in densely built areas, and the occupied space is more efficient. In particular, when constructing in a limited space, the square piles have a larger surface area when in contact with the soil, which is conducive to providing better side friction resistance, which is beneficial to improving the pull-out resistance and lateral stability of the pile; the first pile body 1 is set in a round shape, and the circular cross-section makes the stress distribution at each point of the pile body more uniform, reduces the local stress concentration phenomenon, and is more beneficial for bearing axial loads. The circular pile is subject to less resistance when driving or drilling into the soil; the second pile body 2 can be set in a square shape, which is particularly beneficial for applications that require enhanced friction between the pile body and the surrounding soil, such as use in loose or weak foundations to improve the stability of the overall structure; the second pile body 2 can be set in a round shape, and the circular pile is subject to less resistance when driving or drilling into the soil.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, it also includes: two grouting parts 4, which are connected and arranged on the second pile body 2, are symmetrically arranged, and one side of the grouting part 4 extends into the second pile body 2 and is connected to the grouting channel 3. The grouting part 4 includes: an expansion and contraction pipe 41, which is connected and arranged on the second pile body 2 and is connected to the grouting channel 3; a stabilizing pipe 42, which is connected and arranged on the expansion and contraction pipe 41.

[0034] By setting up the grouting part 4, the cement slurry can be evenly diffused in the first pile body 1, the second pile body 2 and the soil around the pile, forming a strong lateral and end resistance, so that the cement slurry can be evenly diffused into the soil around the first pile body 1 and the second pile body 2, thereby enhancing the soil consolidation at the pile end, improving the end resistance, and facilitating the stable insertion and load-bearing of the pile body.

[0035] like Figure 1 , Figure 2 and Figure 4 As shown, it also includes: an expansion pipe 43, which is connected to the stabilizing pipe 42; and a nozzle part 44, which is connected to the expansion pipe 43. By setting the stabilizing pipe 42, the flow of cement slurry is smoothed, turbulence or pressure fluctuation that may be formed in the expansion and contraction pipe 41 is eliminated, and the cement slurry is ensured to enter the subsequent grouting process in a more uniform and stable state.

[0036] like Figure 2 , Figure 4 and Figure 5 As shown, the nozzle part 44 also includes: a nozzle body 441, which is connected and arranged on the expansion tube 43; a blocking piece 444, which is slidably arranged in the nozzle body 441; and a tension spring 442, which is arranged in the nozzle body 441. By arranging the blocking piece 444, the spray hole 443 can be blocked. When grouting is required, the blocking piece 444 is pushed to move, the slurry spray hole 443 is opened, and the spraying operation is performed to avoid the blockage of the soil slurry spray hole 443.

[0037] like Figure 4 and Figure 5 As shown, it also includes: a plurality of spray holes 443, which are arranged on the nozzle body 441; and the size of the blocking sheet 444 is larger than the size of the spray holes 443. By setting the spray holes 443, cement slurry can be sprayed out to reinforce the soil around the pile body. The spray holes 443 can be arranged in a staggered row or a circular array so that the cement slurry spreads all around.

[0038] like Figure 5 As shown, it also includes: one side of each tension spring 442 is fixedly connected to the outer side of the inner cavity of the nozzle body 441, and the other side is fixedly connected to the outer side of the blocking plate 444, and each tension spring 442 is perpendicular to the outer side of the blocking plate 444 connected to it.

[0039] The technical solution provided by the utility model comprises the following steps: selecting a good construction area, installing a guide rod on the pile position, the guide rod being used to guide the vertical fall of the pile to ensure the verticality of the pile, setting up a pile frame, the pile frame being used to support the hammering equipment to ensure that the hammering force is vertically transmitted to the pile, using a crane to lift the prefabricated pile, aligning it with the pile position, slowly lowering it to a predetermined depth through the guide rod, and starting hammering with equipment such as a diesel hammer, a hydraulic hammer or a vibrating hammer. During the piling process, the hammering force is adjusted according to the soil type and the feedback of the pile. When the pile reaches the designed depth or reaches the bearing capacity requirement, the hammering is stopped. The grouting channel 3 is unblocked and connected with the external delivery pipe through the grouting channel 3. The cement slurry flows downward through the grouting channel 3, and a part of it enters the grouting part 4. The cement slurry first passes through the expansion and contraction tube 41 to increase the flow rate of the cement slurry, then enters the stabilizing tube 42, and finally enters the expansion tube 43, thereby entering the nozzle body 441, pushing the blocking piece 444 to move outward, opening the spray hole 443, and allowing the cement slurry to spray outward; a part continues to flow downward, and with the cooperation of the guide groove 6, is evenly diffused in the soil around the first pile body 1 and the second pile body 2.

[0040] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A prefabricated pile with high bearing capacity, characterized in that: include: A first pile body (1); A second pile body (2) is arranged on top of the first pile body (1); Two grouting channels (3) are arranged in the first pile body (1) and the second pile body (2), and the two grouting channels (3) are symmetrically arranged.

2. The high-bearing capacity prefabricated pile according to claim 1, characterized in that: Also includes: A guide groove (6) is arranged at the bottom of the first pile body (1); Furthermore, the guide groove (6) is in communication with the grouting channel (3).

3. The high-bearing capacity prefabricated pile according to claim 2, characterized in that: Also includes: The guide groove (6) gradually expands along the grouting channel (3) toward the edge of the first pile body (1).

4. The high-bearing capacity prefabricated pile according to claim 1, characterized in that: Also includes: A cavity (5) is arranged in the first pile body (1) and the second pile body (2); The first pile body (1) and the second pile body (2) cooperate to form a rectangular or trapezoidal recess.

5. The high-bearing capacity prefabricated pile according to claim 1, characterized in that: Also includes: The first pile body (1) can be arranged in a square or circular shape; The second pile body (2) can be arranged in a square or circular shape.

6. The high-bearing capacity prefabricated pile according to claim 1, characterized in that: Also includes: Two grouting parts (4) are connected and arranged on the second pile body (2) in a symmetrical manner, and one side of the grouting part (4) extends into the second pile body (2) and is connected to the grouting channel (3). The grouting part (4) comprises: an expansion and contraction tube (41) which is arranged in communication with the second pile body (2) and is in communication with the grouting channel (3); A stabilizing pipe (42) is arranged in communication with the expansion and contraction pipe (41).

7. The high-bearing capacity prefabricated pile according to claim 6, characterized in that: Also includes: An expansion tube (43) is arranged in communication with the stable tube (42); The nozzle portion (44) is arranged in communication with the expansion tube (43).

8. The high-bearing capacity prefabricated pile according to claim 7, characterized in that: Also includes: The nozzle portion (44) comprises: A nozzle body (441) is connected and arranged on the expansion tube (43); A blocking sheet (444) slidably disposed in the nozzle body (441); A tension spring (442) is arranged in the nozzle body (441).

9. The high-bearing capacity prefabricated pile according to claim 8, characterized in that: Also includes: A plurality of spray holes (443) are arranged on the nozzle body (441); Furthermore, the size of the blocking sheet (444) is larger than the size of the spray hole (443).

10. The high-bearing capacity prefabricated pile according to claim 9, characterized in that: Also includes: One side of each tension spring (442) is fixedly connected to the outer side of the inner cavity of the nozzle body (441), and the other side is fixedly connected to the outer side of the blocking plate (444), and each tension spring (442) is perpendicular to the outer side of the blocking plate (444) to which it is connected.

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