Anti-shear pile and preparation method thereof

Abstract

The invention discloses an anti-shear pile and a preparation method thereof.The anti-shear pile comprises a pile body and a reinforcement cage arranged in the pile body and further comprises a supporting plate, the supporting plate is connected with the inner wall of the pile body and comprises a reinforcement mesh plate and a concrete plate, the reinforcement mesh plate is connected with the reinforcement cage, and the concrete plate is connected with the inner wall of the pile body; the supporting plates are distributed in the axial direction of the pile body. The multiple concrete slabs are arranged in the pile body and connected with the inner wall of the pile body, the resistance of the pile body to soil shear force can be remarkably improved, namely the shear bearing capacity (horizontal load resistance) and the bending rigidity of the pile body are improved, and therefore the number or the diameter of piles is reduced under the same condition, and the overall engineering cost is reduced. Compared with a traditional hollow pipe pile, the shear-resistant pile has the advantages that through reasonable arrangement of the internal concrete slabs, on the premise that the shear resistance is not reduced, the material consumption of the pile body is reduced, and the dual goals of structure optimization and material saving are achieved. Therefore, the shear strength is guaranteed, the weight of the pile foundation is reduced, and convenience is provided for transportation and installation.

Description

Technical Field

[0001] The invention relates to the field of prefabricated piles, and in particular to a shear-resistant pile and a preparation method thereof. Background Art

[0002] With the development of urbanization and the acceleration of infrastructure construction, the height of buildings is increasing, and the requirements for foundation treatment technology are also increasing. Traditional pile foundation technologies such as precast concrete piles and bored piles often require larger pile diameters or more piles to meet the structural bearing capacity requirements when facing complex geological conditions, especially in unfavorable environments such as high groundwater levels and soft soil layers. However, this method not only increases the cost of the project, but may also lead to a series of problems such as increased construction difficulty and extended construction period due to the increase in pile diameter.

[0003] Among the many ground treatment methods, pile foundation technology is widely used due to its high bearing capacity and stability. However, when facing soil shear force, traditional solid or hollow pipe piles often need to increase the cross-sectional area or number of piles to enhance their shear resistance. Although this method can solve the shear resistance problem to a certain extent, it inevitably leads to excessive use of materials, increases project costs, and may cause unnecessary burdens on the environment. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a shear pile and a preparation method thereof.

[0005] The present invention provides a shear pile and a preparation method thereof, which adopts the following technical scheme: A shear pile comprises a pile body and a steel cage arranged in the pile body, and also comprises a support plate, wherein the support plate is connected to the inner wall of the pile body, the support plate comprises a steel mesh plate and a concrete plate, the steel mesh plate is connected to the steel cage, and the concrete plate is connected to the inner wall of the pile body; the support plates are distributed along the axial direction of the pile body.

[0006] Through the above technical solution, by arranging multiple concrete plates in the pile body and connecting them to the inner wall of the pile body, the pile body's resistance to soil shear force can be significantly improved, thereby reducing the number or diameter of the piles under the same conditions, and reducing the cost of the overall project. Compared with traditional hollow pipe piles, the shear piles of the present invention reduce the material consumption of the pile body by reasonably arranging the internal concrete plates without sacrificing the shear resistance, thereby achieving the dual goals of structural optimization and material saving. Therefore, while ensuring the shear strength, the weight of the pile foundation is also reduced, which provides convenience for transportation and installation.

[0007] As a preferred embodiment of the present invention, the cross-section of the pile body is a rectangular or circular structure.

[0008] Through the above technical solution, the pile body is a rectangular or circular structure, so that the shear pile can be applied to commonly used pipe piles, square piles or other rectangular piles.

[0009] As a preferred embodiment of the present invention, a hole is provided at the center of the concrete slab of the support plate.

[0010] The above technical solution allows the support plate to be prepared by centrifugal process, thereby improving production efficiency and ensuring the quality of the support plate. The presence of holes also helps to reduce material usage and manufacturing costs while maintaining good shear resistance, making the pile both economical and strong.

[0011] The present invention also discloses another method for preparing a shear pile, comprising the following steps: S1. Prepare the mold and apply the release agent on the mold; S2, installing the steel cage in the mold and putting on the tension end plate, the steel cage is also provided with a plurality of groups of steel mesh plates, and the steel mesh plates are tied together with the steel cage; S3. Place concrete in the mold. When placing concrete, the amount of concrete at the steel mesh plate needs to be greater than that in other areas; S4. Prestress the steel cage according to the designed tension stress, and then lock and anchor it; S5. After the mold is closed, the entire mold is placed on a centrifuge for centrifugal molding; S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7, steam curing the formed piles; S8. Release the cured solid square piles from the mould.

[0012] Through the above technical solution, by connecting the steel mesh plate to the steel cage, the concrete is centrifugally formed onto the steel mesh plate by using the concrete centrifugal forming method to form a support plate. This method ensures the high quality of the final product. In particular, the centrifugal forming technology is used to form the pile body and the support plate as one piece, so that the concrete distribution is more even, thereby improving the structural strength and durability of the shear pile.

[0013] As a preferred embodiment of the present invention, step S2 also includes the step of installing baffles, where baffles are installed on both sides of the steel mesh plate, the diameter of the baffles is smaller than the inner diameter of the steel cage, and the distance between the outer periphery of the baffles and the steel cage is not less than the distance between the steel cage and the inner wall of the pile body.

[0014] Through the above technical solution, the design of installing baffles on both sides of the steel mesh can effectively prevent concrete from overflowing during the pouring process, ensuring the accuracy of the geometric dimensions of the shear pile during the forming process. The presence of the baffles also protects the steel mesh from deformation or displacement during the pouring process, thereby ensuring the structural integrity of the shear pile.

[0015] As a preferred embodiment of the present invention, the baffle and the steel cage are connected by a pull rope and a hook.

[0016] Through the above technical solution, the baffle is connected to the steel cage by a drawstring and a hook, which is easy to install and improves production efficiency. The drawstring and hook connection method ensures the stability of the baffle during the centrifugal process of the mold and prevents it from falling off or deflecting due to external forces.

[0017] As a preferred embodiment of the present invention, the baffle is made of a material that melts at high temperature.

[0018] Through the above technical solution, the baffle is made of a material that melts at high temperature and will melt during the steaming process of the pile body.

[0019] The present invention also discloses another method for preparing a shear pile, comprising the following steps: S1. Prepare the mold and apply the release agent on the mold; S2, installing a steel cage in a mold and putting on a tensioning end plate, wherein a plurality of precast concrete panels are distributed on the steel cage along the length direction, wherein the precast concrete panels include a steel mesh panel and a concrete layer, wherein the steel mesh panel protrudes to the outer periphery of the concrete layer, and the protruding steel mesh panel is tied together with the steel cage; S3, placing concrete in the mold; S4. Prestress the steel cage according to the designed tension stress, and then lock and anchor it; S5. After the mold is closed, the entire mold is placed on a centrifuge for centrifugal molding; S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7, steam curing the formed piles; S8. Release the cured solid square piles from the mould.

[0020] Through the above technical solution, by combining precast concrete slabs with steel mesh plates, the preparation of shear piles is made more convenient and efficient. The use of precast concrete slabs can also control the quality of concrete in advance to ensure that the support plates can be fully covered with concrete, thereby improving the consistency and reliability of the overall structure.

[0021] As a preferred embodiment of the present invention, there is a certain distance between the outer periphery of the concrete layer and the steel cage, and the distance is not less than the thickness from the steel cage to the inner wall of the pile body.

[0022] Through the above technical solution, there is a certain distance between the outer periphery of the concrete layer and the steel cage, which is not less than the thickness from the steel cage to the inner wall of the pile body, ensuring that the concrete layer does not occupy the space of the pile body and does not affect the formation of the pile body.

[0023] As a preferred embodiment of the present invention, the outer peripheral surface of the concrete slab is an uneven structure, and uneven structures are also provided on the front and back sides of the concrete slab near the edge.

[0024] Through the above technical solution, the uneven structure at the front and back edges of the concrete slab increases the friction between the slab and the pile body, and improves the firmness of the connection. This structural design can also improve the flow properties of concrete, making it easier to compact during the pouring process, thereby further improving the mechanical properties of the shear pile.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The present invention provides a shear pile, which significantly enhances the ability of the pile to resist soil shear force by arranging multiple concrete plates in the pile body and connecting them to the inner wall of the pile body. Compared with the traditional pile foundation, the design reduces the amount of material required for the pile body without sacrificing the shear resistance, thereby effectively reducing the cost of the overall project while ensuring the structural strength. In addition, due to the reduced weight of the shear pile, it is not only convenient for the transportation and installation of the pile foundation, but also reduces the construction difficulty and shortens the construction period.

[0026] 2. The shear pile of the present invention realizes structural optimization by rationally arranging the support plate in the pile body. The support plate is composed of a steel mesh plate and a concrete plate, wherein the concrete plate is tightly combined with the inner wall of the pile body, and the steel mesh plate is connected to the steel cage in the pile body. Such a design not only ensures the shear strength, but also achieves the purpose of saving resources by reducing unnecessary material use. At the same time, due to the introduction of the support plate, the structure of the pile body is more stable and reliable, which helps to reduce material waste during the construction process and has positive significance for environmental protection.

[0027] 3. The preparation method of the shear pile adopts a combination of precast concrete panels and steel mesh panels, which makes the production process of the shear pile more efficient and convenient. The use of precast concrete panels makes it possible to control the quality of concrete during the production stage, ensuring that the support plate can be completely covered with concrete, improving the consistency and reliability of the overall structure. In addition, the use of centrifugal molding technology can achieve uniform distribution of concrete, further improving the structural strength and durability of the shear pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a shear pile of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure for preparing shear piles according to Example 1 of the present invention.

[0030] Figure 3 yes Figure 2 Enlarged view of part A.

[0031] Figure 4 It is a schematic diagram of the structure of the mold undergoing centrifugation.

[0032] Figure 5 It is a schematic diagram of the shear pile preparation structure of Example 2 of the present invention.

[0033] Explanation of the reference numerals: 1. Pile body; 2. Steel cage; 3. Support plate; 4. Mould; 5. End plate; 6. Precast concrete slab; 7. Baffle; 31. Concrete slab; 32. Steel mesh; 401. Inner mould; 402. Outer shell; 403. Tensioning rod; 404 Rolling ring; 405. First fixed end plate; 406. Second fixed end plate; 407. Tensioning end plate; 61. Concrete layer. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 The present invention is described in further detail.

[0035] Example 1 like Figure 1 As shown, this embodiment discloses a shear pile, including a pile body 1 and a steel cage 2 arranged in the pile body. In this embodiment, the cross section of the pile body 1 is square. The pile body 1 is a hollow structure in the middle. A support plate 3 is arranged in the middle hollow layer of the pile body 1. The support plate 3 includes a concrete plate 31 and a steel mesh plate 32 embedded in the concrete plate 31. The steel mesh plate 32 extends into the pile body 1 and is connected to the steel cage 2 in the pile body 1. In this embodiment, the steel mesh plate 32 and the steel cage 2 are connected by binding. The concrete plate 31 is connected to the inner wall of the pile body 1. In this embodiment, the concrete plate 31 and the pile body 1 are an integrally formed concrete structure.

[0036] In this embodiment, the support plates 3 are spaced apart along the length direction of the pile body, and the distance between two adjacent support plates 3 is determined according to the design requirements. By arranging a plurality of support plates 3 in the pile body 1, the pile body 1 can significantly improve its ability to resist soil shear force, thereby reducing the number or diameter of the piles under the same conditions, and reducing the cost of the overall project. Compared with traditional hollow pipe piles or hollow square piles, the shear piles of this embodiment reduce the material consumption of the pile body without sacrificing shear performance by reasonably arranging the internal support plates, thereby achieving the dual goals of structural optimization and material saving. Therefore, while ensuring the shear strength, the weight of the pile foundation is also reduced, which provides convenience for transportation and installation.

[0037] Reference Figures 2 to 4 A shear pile of this embodiment is prepared by the following method: S1. Prepare mold 4 and apply release agent on mold 4. Figure 2 and Figure 3 The mold includes an inner mold 401 and an outer shell 402, and the inner mold 401 and the outer shell 402 are welded by a rib plate. The cross section of the inner mold 401 is a square structure, and the cross section of the outer shell 402 is a circle. An annular rolling ring 404 is arranged on the outer peripheral surface of the outer shell 402, and the annular rolling ring 404 is used to be placed on a centrifuge for centrifugation.

[0038] The inner mold 401 includes a symmetrical upper mold and a lower mold, and the outer shell includes an upper shell and a lower shell. The upper shell and the lower shell can be locked and fixed by using locking bolts.

[0039] A first fixed end plate 405 and a second fixed end plate 406 are respectively provided at both ends of the lower mold, and a tensioning end plate 407 is also provided in the lower mold 402. The tensioning end plate 407 is connected through a tensioning rod 403. One end of the tensioning rod 403 is connected to the tensioning end plate 407, and the other end of the tensioning rod 403 passes through the second fixed end plate 406 to connect with an external tensioning mechanism. An opening is provided at the center of the first fixed end plate 405, and a plastic film is provided to seal the opening. An isolation agent is applied to the upper mold and the lower mold of the inner mold 401, the lower mold, and the tensioning end plate.

[0040] S2, installing the steel cage 2 in the mold and putting on the tension end plate 407, the steel cage 2 is also provided with a plurality of groups of steel mesh plates 32, the steel mesh plates 32 are tied together with the steel cage 2, the specific steps are: S21. According to the number of steel mesh panels 32 to be installed, the steel mesh panels 32 are installed in the prepared steel cage 2, and a baffle 7 made of foam material is set in the front and rear directions of each steel mesh panel 32. The baffles made of foam material are round or square. The baffles 7 do not contact the steel cage 2, and the distance between the outer periphery of the baffle 7 and the steel cage 2 is not less than the distance between the steel cage 2 and the inner wall of the pile body 1 (to ensure that the baffle 7 does not affect the forming of the pile body 1 during the subsequent centrifugation process). The baffles 7 are tied to the steel cage 2 with fine steel wire ropes to complete the fixation, and the steel mesh panels 32 are tied to the steel cage 2 to complete the fixation of the steel mesh panels 32 and the baffles 7.

[0041] S22, after the steel mesh plate 32 and the baffle plate 7 are fixed, the end plates 5 are installed at both ends of the steel cage 2, and the steel cage 2 is hoisted into the lower mold for installation.

[0042] S23, locking the end plates 5 at both ends of the steel cage 2 with the first fixed end plate 405 and the tensioning end plate 407 respectively.

[0043] S3. Placing concrete in the mold. Evenly distribute the concrete into the lower mold by a concrete placing machine. When placing the concrete, the amount of concrete at the steel mesh plate 32 needs to be greater than that in other areas.

[0044] S4. Prestress the steel cage 2 according to the designed tension stress, and then lock and anchor it.

[0045] S5, the upper mold is transported to the upper part of the lower mold by a crane, and the upper mold is installed on the lower mold, so that the upper mold and the lower mold are molded together, and the entire mold is locked to complete the mold closing. After the mold 4 is molded together, the mold 4 is placed on a centrifuge as a whole for centrifugal molding.

[0046] S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7, steam curing the formed piles. The steam curing system can be determined according to the raw materials and equipment conditions used. After steam curing, the baffle 7 will be melted.

[0047] S8. Release the cured pile body from the mould.

[0048] Embodiment 2: Reference Figure 5 The present embodiment discloses a shear pile, which is the same as that of the embodiment 1 in other aspects, except that the preparation method of the support plate 3 in the present embodiment is different from that in the embodiment 1. The preparation method of the shear pile in the present embodiment adopts the following steps: S1. Prepare mold 4 and apply release agent on mold 4. Figure 2 and Figure 3 The mold includes an inner mold 401 and an outer shell 402, and the inner mold 401 and the outer shell 402 are welded by a rib plate. The cross section of the inner mold 401 is a square structure, and the cross section of the outer shell 402 is a circle. An annular rolling ring 404 is arranged on the outer peripheral surface of the outer shell 402, and the annular rolling ring 404 is used to be placed on a centrifuge for centrifugation.

[0049] The inner mold 401 includes a symmetrical upper mold and a lower mold, and the outer shell includes an upper shell and a lower shell. The upper shell and the lower shell can be locked and fixed by using locking bolts.

[0050] A first fixed end plate 405 and a second fixed end plate 406 are respectively provided at both ends of the lower mold, and a tensioning end plate 407 is also provided in the lower mold 402. The tensioning end plate 407 is connected through a tensioning rod 403. One end of the tensioning rod 403 is connected to the tensioning end plate 407, and the other end of the tensioning rod 403 passes through the second fixed end plate 406 to connect with an external tensioning mechanism. An opening is provided at the center of the first fixed end plate 405, and a plastic film is provided to seal the opening. An isolation agent is applied to the upper mold and the lower mold of the inner mold 401, the lower mold, and the tensioning end plate.

[0051] S2, installing the steel cage 2 in the mold and putting on the tension end plate 407, the steel cage 2 is also provided with a plurality of groups of steel mesh plates 32, the steel mesh plates 32 are tied together with the steel cage 2, the specific steps are: S21, according to the number of support plates 3 required for the shear pile design, a precast concrete slab 6 is installed in the prepared steel cage 2, and the precast concrete slab 6 includes a steel mesh plate 32 and a concrete layer 61. The steel mesh plate 32 protrudes to the outer periphery of the concrete layer 61, and the steel mesh plate 32 protruding to the outer periphery of the concrete layer 61 is tied together with the steel cage 2. The concrete layer 61 is circular or square, and there is a certain distance between the outer periphery of the concrete layer 61 and the steel cage, and the distance needs to be greater than the thickness from the steel cage 2 to the inner wall of the pile body 1, so as to ensure that the concrete layer 61 does not affect the formation of the pile body 1.

[0052] The outer peripheral surface of the concrete layer 61 is an uneven structure, and an uneven structure is also provided on the front and back sides of the concrete layer 61 near the edge, which is conducive to the connection between the concrete and the concrete layer 61 during subsequent centrifugation.

[0053] S22, after a plurality of precast concrete slabs 6 are fixed, end plates 5 are installed at both ends of the steel cage 2, and the steel cage 2 is hoisted into the lower mold for installation.

[0054] S23, locking the end plates 5 at both ends of the steel cage 2 with the first fixed end plate 405 and the tensioning end plate 407 respectively.

[0055] S3. Placing concrete in the mold. Use a concrete placing machine to evenly distribute the concrete into the lower mold. When placing the concrete, the amount of concrete at the precast concrete slab 6 needs to be slightly larger than that in other areas.

[0056] S4. Prestress the steel cage 2 according to the designed tension stress, and then lock and anchor it.

[0057] S5, the upper mold is transported to the upper part of the lower mold by a crane, and the upper mold is installed on the lower mold, so that the upper mold and the lower mold are molded together, and the entire mold is locked to complete the mold closing. After the mold 4 is molded together, the mold 4 is placed on a centrifuge as a whole for centrifugal molding.

[0058] S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7. Steam cure the formed piles. The steam curing system can be determined based on the raw materials and equipment conditions used.

[0059] S8. Release the cured pile from the mould.

[0060] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shear pile, comprising a pile body (1) and a steel cage (2) arranged in the pile body (1), characterized in that: It also comprises a support plate (3), the support plate (3) being connected to the inner wall of the pile body (1), the support plate (3) comprising a steel mesh plate (32) and a concrete plate (31), the steel mesh plate (32) being connected to the steel cage (2), and the concrete plate (31) being connected to the inner wall of the pile body (1); the support plate (3) is distributed along the axial direction of the pile body (1).

2. A shear pile according to claim 1, characterized in that: The cross-section of the pile body (1) is a rectangular or circular structure.

3. A shear pile according to claim 1 or 2, characterized in that: The concrete plate (31) of the support plate (3) is provided with a hole at the centre.

4. A method for preparing a shear pile as claimed in any one of claims 1 to 3, characterized in that: The steps include: S1. Prepare the mold (4) and apply a release agent on the mold; S2, installing the steel cage (2) in the mold (4) and installing a tensioning end plate (407), wherein a plurality of groups of steel mesh plates (32) are also arranged on the steel cage (2), and the steel mesh plates (32) are tied together with the steel cage (2); S3, placing concrete in the mold (2), and when placing concrete, the amount of concrete at the steel mesh plate (32) needs to be greater than that in other areas; S4, prestressing the steel cage (2) according to the designed tension stress, and then locking and anchoring it; S5, after the mold is closed, the mold (4) is placed as a whole on a centrifuge for centrifugal molding; S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7, steam curing the formed piles; S8. Release and demould the cured shear piles.

5. The method for preparing a shear pile according to claim 4, characterized in that: The step S2 also includes the step of installing a baffle (7), wherein the baffle (7) is installed on both sides of the steel mesh plate (32), and the distance between the outer periphery of the baffle (7) and the steel cage (2) is not less than the distance between the steel cage (2) and the inner wall of the pile body (1).

6. The method for preparing a shear pile according to claim 5, characterized in that: The baffle (7) and the steel cage (2) are connected via a drawstring and a hook.

7. The method for preparing a shear pile according to claim 5, characterized in that: The baffle (7) is made of a material that melts at high temperatures.

8. A method for preparing a shear pile as claimed in any one of claims 1 to 3, characterized in that: The steps include: S1, preparing a mold (4) and applying a release agent on the mold (4); S2, installing the steel cage (2) in the mold and placing a tensioning end plate (407), wherein a plurality of groups of precast concrete panels (6) are distributed on the steel cage (2) along the length direction, wherein the precast concrete panels (6) include a steel mesh panel (32) and a concrete layer (61), wherein the steel mesh panel (32) protrudes from the outer periphery of the concrete layer (61), and the protruding steel mesh panel (32) is tied together with the steel cage (2); S3, placing concrete in the mold (4); S4, prestressing the steel cage (2) according to the designed tension stress, and then locking and anchoring it; S5, after the mold (4) is closed, the mold (4) is placed as a whole on a centrifuge for centrifugal molding; S6. After centrifugation is completed, pour out all the remaining slurry from the concrete; S7, steam curing the formed piles; S8. Release and demould the cured shear piles.

9. The method for preparing a shear pile according to claim 8, characterized in that: There is a certain distance between the outer periphery of the concrete layer (61) and the steel cage (2), and the distance is not less than the thickness from the steel cage (2) to the inner wall of the pile body (1).

10. The method for preparing a shear pile according to claim 9, characterized in that: The outer peripheral surface of the concrete layer (61) is an uneven structure, and uneven structures are also provided on the front and back surfaces of the concrete layer (61) near the edges.

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