Stiffness reinforcing connector for rear top expanding arm of tubular pile
By designing the strength of the top arm for pipe piles to strengthen the joint and using the jack and grouting chamber structure to form the enlarged head, the problem of fragility of pipe pile joints is solved, the bearing capacity and shear strength are significantly improved, and the construction process is simplified.
Patent Information
- Application Number
- CN202420622017.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Pipe pile joints are fragile when subjected to horizontal loads and seismic loads, making it difficult to effectively deal with it, and the prior art is difficult to improve their bearing capacity.
Design a reinforcement joint for the strength of the pipe pile rear top expansion arm. Through the jack and grouting chamber structure of the upper and lower joints, the top plate in the joint is opened to form a pile arm, and an enlarged head is formed by grouting to wrap the upper and lower joints. Make it a whole and improve vertical and horizontal bearing capacity.
It effectively solves the problem of pipe pile joint fracture, significantly improves vertical and horizontal bearing capacity, and increases shear strength by reinforcing, reduces sinking resistance, simplifies construction, and saves time and costs.
Smart Images
Figure CN222161229U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of civil engineering pile foundations, and in particular relates to a rigid reinforcement joint for a rear top expansion arm of a pipe pile. Background Art
[0002] Pipe pile foundations are widely used in high-rise buildings. Pipe piles are prefabricated in factories and can be installed on site, which makes the construction efficient. However, the length of prefabricated piles is generally more than ten meters, and each section is connected by a joint. Therefore, the joint of the pipe pile is the weakest part of the pipe pile. As a result, the pipe pile is difficult to withstand horizontal loads and seismic loads. Therefore, how to effectively handle the joint of the pipe pile is currently a difficult problem that the industry needs to solve urgently. Utility Model Content
[0003] The utility model provides a rigid reinforcement joint for a rear top expansion arm of a pipe pile, which greatly improves the vertical and horizontal bearing capacity of a pile foundation.
[0004] The technical solution adopted by the utility model to solve the technical problem is: a rigid reinforcement joint for the rear top expansion arm of a pipe pile, the reinforcement joint connects two adjacent pipe piles, the reinforcement joint comprises an upper joint and a lower joint, the upper joint is located at the upper end of the pipe pile, and the lower joint is located at the lower end of the pipe pile;
[0005] The upper joint includes an upper joint body, a first upper reinforcing plate, a first grouting chamber, four first transverse top jacks, four first top plates, a first lower reinforcing plate, and a plurality of positioning holes. The first upper reinforcing plate is located at the upper part of the upper joint body, the first grouting chamber is arranged below the first upper reinforcing plate, the four first transverse top jacks are located below the first grouting chamber, and the four first transverse top jacks are distributed in four directions along the horizontal plane, a first top plate is arranged at the output end of each first transverse top jack, the first lower reinforcing plate is arranged below the first transverse top jack, and a plurality of positioning holes are opened on the first lower reinforcing plate;
[0006] The lower joint includes a lower joint body, a second upper reinforcing plate, a plurality of positioning columns, a second grouting chamber, four second transverse top jacks, four second top plates, and a second lower reinforcing plate. The second upper reinforcing plate is located at the upper part of the lower joint body. The second upper reinforcing plate is provided with positioning columns matching the positioning holes. The second grouting chamber is arranged below the second upper reinforcing plate. The four second transverse top jacks are located below the second grouting chamber, and the four second transverse top jacks are distributed in four directions along the horizontal plane. A second top plate is arranged at the output end of each second transverse top jack, and the second lower reinforcing plate is arranged below the second transverse top jack.
[0007] As a further preferred embodiment of the present invention, the material of the upper joint and the lower joint is the same as that of the pipe pile, and the concrete strength of the upper joint and the lower joint is one level higher than the strength of the pile body.
[0008] As a further preferred embodiment of the present invention, the first upper reinforcing plate, the first lower reinforcing plate, the second upper reinforcing plate and the second lower reinforcing plate are all reinforced.
[0009] As a further preferred embodiment of the present invention, the diameter of the positioning holes is between 30 mm and 60 mm, and the number of the positioning holes is between 2 and 6.
[0010] As a further preferred embodiment of the present invention, the first grouting chamber and the second grouting chamber have the same structure, and both have circular or cross-shaped cross-sections and are hollow.
[0011] As a further preferred embodiment of the present invention, the first grouting chamber is located in the upper half of the first top plate, and before the first horizontal top jack is operated, the outer wall of the first grouting chamber is tightly fitted to the first top plate;
[0012] The second grouting chamber is located in the upper half of the second top plate, and before the second cross top jack is not operated, the outer wall of the second grouting chamber is tightly fitted to the second top plate.
[0013] As a further preferred embodiment of the present invention, the four first transverse top jacks and the four second transverse top jacks are all distributed in a cross shape.
[0014] As a further preferred embodiment of the present invention, a hydraulic conversion chamber is provided in the middle of the four first transverse top jacks and the four second transverse top jacks.
[0015] As a further preferred embodiment of the present invention, the oil pressure conversion chamber is a hexahedron, the oil pressure conversion chamber is connected to the oil pipe, and the four sides of the oil pressure conversion chamber side wall are respectively connected to the first horizontal top jack or the second horizontal top jack.
[0016] As a further preference of the utility model, it also includes a plurality of grouting pipes, sealing joints, and flow controllers. The plurality of grouting pipes are connected in sequence and extend from the external environment to the inside of the pipe pile, and are connected to the first grouting chamber and the second grouting chamber through sealing joints; a flow controller is provided on each section of the grouting pipe.
[0017] Through the above technical solution, compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model uses a jack to push open the top plate in the joint to form a pile arm, and then grouting is performed in the pile arm to form a rigid pile arm. Further grouting is performed to form an enlarged head. The enlarged head can completely wrap the upper and lower joints to make the pipe pile a whole, thereby solving the problem of broken pipe piles. At the same time, the enlarged head can also improve the vertical and horizontal bearing capacity of the pipe pile. At the same time, due to the existence of the pile arm, the shear strength of the enlarged head itself is greatly improved, and the enlarged head is formed into a rigid enlarged head with reinforcement. At the same time, it can also reduce the sinking resistance, facilitate construction, and save construction time and construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the rigid reinforcement joint for the rear top expansion arm of the pipe pile according to the utility model;
[0020] Figure 2 This is a diagram of the first top plate and the second top plate of the utility model before being opened;
[0021] Figure 3 This is a state diagram after the first top plate and the second top plate of the utility model are pushed open.
[0022] In the figure: 1 is a pile cap, 2 is a pipe pile, 3-1 is a positioning column, 3-2 is a positioning hole, 4 is an upper joint, 5 is a lower joint, 6 is a pile head reinforcement piece, 7 is a first upper reinforcing plate, 8 is a first grouting chamber, 9 is a first transverse top jack, 10 is an oil pressure conversion chamber, 11 is a sealing joint, 12 is a flow controller, 13 is a first lower reinforcing plate, 14 is a first top plate, 15 is a grouting pipe, 16 is an oil pipe, 17 is an enlarged head, 18 is a pile arm, 19 is a second upper reinforcing plate, 20 is a second lower reinforcing plate, 21 is a second grouting chamber, 22 is a second transverse top jack, and 23 is a second top plate. DETAILED DESCRIPTION
[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0024] In the description of the present utility model, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention. Example
[0025] This embodiment provides a preferred implementation scheme, a stiffening joint for a rear expansion arm of a pipe pile, such as Figures 1 to 3 As shown, the reinforced joint connects two adjacent pipe piles 2, and the reinforced joint includes an upper joint 4 and a lower joint 5, the upper joint 4 is located at the upper end of the pipe pile 2, and the lower joint 5 is located at the lower end of the pipe pile 2. Several pipe piles 2 are connected into an integrated structure, and a pile cap 1 is arranged on the top of the integrated structure, and a pile head reinforcement member 6 is arranged at the bottom, which is used to prevent the pile head from being damaged.
[0026] The above-mentioned upper joint 4 includes an upper joint body, a first upper reinforcing plate 7, a first grouting chamber 8, four first transverse top jacks 9, four first top plates 14, a first lower reinforcing plate 13, and a plurality of positioning holes 3-2. The upper joint body is a columnar structure, and the first upper reinforcing plate 7, the first grouting chamber 8, four first transverse top jacks 9, the first lower reinforcing plate 13, and a plurality of positioning holes 3-2 are all located in the upper joint body.
[0027] The first upper reinforcing plate 7 is located at the upper part of the upper joint body, and the first upper reinforcing plate 7 is reinforced. The first grouting chamber 8 is arranged below the first upper reinforcing plate 7 .
[0028] The four first transverse top jacks 9 are located below the first grouting chamber 8, and the four first transverse top jacks 9 are distributed in four directions along the horizontal plane; preferably, the four first transverse top jacks 9 are distributed in a cross shape.
[0029] A first top plate 14 is provided at the output end of each first transverse top jack 9. The first top plate 14 is in an arc shape, and its curvature is the same as that of the pipe pile 2. The height of the first top plate 14 is one-third of the height of the upper joint body, and the outer circumference of the first top plate 14 is one-fourth of the circumference of the pipe pile 2. The first top plate 14 will move radially along the upper joint body with the operation of the first transverse top jack 9. The first transverse top jack 9 can push the first top plate 14 out of the pipe pile 2 to form a pile arm 18, and at the same time, the grouting channel between the first grouting chamber 8 and the first top plate 14 is opened. Preferably, in order to facilitate the formation of the pile arm 18, through holes are opened at the corresponding positions of the upper joint body and the pipe pile 2 to facilitate the ejection of the first top plate 14.
[0030] The first lower reinforcing plate 13 is arranged below the first horizontal top jack 9, and the first lower reinforcing plate 13 is reinforced; a plurality of positioning holes 3-2 are provided on the first lower reinforcing plate 13, preferably, the diameter of the positioning holes 3-2 is between 30mm-60mm, and the number of the positioning holes 3-2 is set between 2-6 according to the pile diameter.
[0031] Specifically, the first grouting chamber 8 is in the upper half of the first top plate 14, and before the first cross-top jack 9 is not operated, the first top plate 14 is tightly attached to the outer wall of the first grouting chamber 8; when the first top plate 14 is opened, the grouting channels at the first grouting chamber 8 and the first top plate 14 are opened, and the slurry can be pressed into the pile arm 18 from the grouting channels.
[0032] The above-mentioned lower joint 5 includes a lower joint body, a second upper reinforcing plate 19, a plurality of positioning columns 3-1, a second grouting chamber 21, four second transverse top jacks 22, four second top plates 23, and a second lower reinforcing plate 20. The lower joint body is a columnar structure, and the second upper reinforcing plate 19, a plurality of positioning columns 3-1, a second grouting chamber 21, four second transverse top jacks 22, four second top plates 23, and a second lower reinforcing plate 20 are all located in the lower joint body.
[0033] The second upper reinforcing plate 19 is located at the upper part of the lower joint body, and the second upper reinforcing plate 19 is reinforced. The second upper reinforcing plate 19 is provided with positioning columns 3-1 matched with the positioning holes 3-2, and the number of positioning columns 3-1 is the same as the number of positioning holes 3-2. The second grouting chamber 21 is arranged below the second upper reinforcing plate 19.
[0034] The four second transverse top jacks 22 are located below the second grouting chamber 21 , and the four second transverse top jacks 22 are distributed in four directions along the horizontal plane; preferably, the four second transverse top jacks 22 are distributed in a cross shape.
[0035] A second top plate 23 is provided at the output end of each second transverse top jack 22, and the second top plate 23 will move radially along the lower joint body as the second transverse top jack 22 operates; the second transverse top jack 22 can push the second top plate 23 out of the pipe pile 2 to form the pile arm 18, and at the same time the grouting channel between the second grouting chamber 21 and the second top plate 23 is opened. Preferably, in order to facilitate the formation of the pile arm 18, through holes are opened at corresponding positions of the lower joint body and the pipe pile 2 to facilitate the ejection of the second top plate 23.
[0036] The second lower reinforcing plate 20 is disposed below the second transverse top jack 22 , and the second lower reinforcing plate 20 is reinforced.
[0037] Specifically, the second grouting chamber 21 is located in the upper half of the second top plate 23, and the second top plate 23 is tightly attached to the outer wall of the second grouting chamber 21 before the second horizontal top jack 22 is operated; when the second top plate 23 is opened, the grouting channels at the second grouting chamber 21 and the second top plate 23 are opened, and the slurry can be pressed into the pile arm 18 from the grouting channel. First, the ends of each section of the pipe pile 2 are connected together by welding or threading. After the pipe pile 2 is completely statically pressed or driven into the designed depth of the soil layer, the first horizontal top jack 9 and the second horizontal top jack 22 are pressurized by oiling, the first top plate 14 and the second top plate 23 are pushed open, and then grouting is injected into the pile arm 18. Finally, the slurry wraps the joint of the pipe pile 2, and an enlarged head 17 is formed at the joint. The pipe pile 2 is formed into a whole by the enlarged head 17, which solves the problem of broken piles at the joint of the pipe pile 2 and greatly improves the vertical and horizontal bearing capacity of the foundation of the pipe pile 2.
[0038] In this embodiment, a hydraulic conversion chamber 10 is arranged in the middle of the four first horizontal top jacks 9 and the four second horizontal top jacks 22. The hydraulic conversion chamber 10 is a hexahedron, the hydraulic conversion chamber 10 is connected to the oil pipe 16, and the four sides of the side wall of the hydraulic conversion chamber 10 are respectively connected to the first horizontal top jack 9 or the second horizontal top jack 22. The four first horizontal top jacks 9 and the four second horizontal top jacks 22 can be ejected simultaneously by supplying oil through the hydraulic conversion chamber 10.
[0039] This embodiment further includes a plurality of grouting pipes 15, sealing joints 11, and flow controllers 12. The plurality of grouting pipes 15 are sequentially connected and extend from the external environment to the inside of the pipe pile 2, and are connected to the first grouting chamber 8 and the second grouting chamber 21 through the sealing joints 11. A flow controller 12 is provided on each section of the grouting pipe 15, which can facilitate the control of the grouting amount of the slurry.
[0040] In this embodiment, the material of the upper joint 4 and the lower joint 5 is the same as that of the pipe pile 2, and the concrete strength of the upper joint 4 and the lower joint 5 is one level higher than the strength of the pile body.
[0041] In this embodiment, the first grouting chamber 8 and the second grouting chamber 21 have the same structure, and both have circular or cross-shaped cross-sections and are hollow.
[0042] The specific operation steps of this implementation plan are as follows:
[0043] Step S1: design the jacking force of the first horizontal top jack 9 and the second horizontal top jack 22 according to the geological survey data;
[0044] Step S2: installing the first upper reinforcing plate 7, the first lower reinforcing plate 13, the first grouting chamber 8, the four first transverse top jacks 9, and the four first top plates 14 in the upper joint body to form the upper joint 4, and installing the second upper reinforcing plate 19, the second grouting chamber 21, the four second transverse top jacks 22, the four second top plates 23, and the second lower reinforcing plate 20 in the lower joint body to form the lower joint 5;
[0045] Step S3: The first section of the pipe pile 2 is driven into the soil. When the upper joint 5 on the first section of the pipe pile 2 reaches the mud surface, the second section of the pipe pile 3, the third section of the pipe pile 3, ... the nth section of the pipe pile 3 are installed in sequence. The upper joint 5 of the pipe pile 2 first pressed into the soil is welded or threadedly connected with the lower joint 5 of the pipe pile 2 to be pressed into the soil to form a preliminary connection. Repeat the above steps until the installation of the last section of the pipe pile 2 is completed.
[0046] Step S4: After the installation is completed, oil is supplied to the oil pressure conversion chamber 10 through the oil pipe 16 to push open the first horizontal top jack 9 and the second horizontal top jack 22, so that a cavity is formed around the upper joint 4 and the lower joint 5;
[0047] Step S5: Then grout is injected into the cavity to form an enlarged head 17.
[0048] The utility model uses the first transverse top jack 9 to push open the first top plate 14 in the upper joint 4 to form the pile arm 18, and the second transverse top jack 22 to push open the second top plate 23 in the lower joint 5 to form the pile arm 18, and then grouting is performed in the pile arm 18 to form a rigid pile arm 18, and further grouting is performed to form an enlarged head 17, which can completely wrap the upper and lower joints, so that the pipe pile 2 becomes a whole, and solves the problem of broken piles of the pipe pile 2; at the same time, the enlarged head 17 can also improve the vertical and horizontal bearing capacity of the pipe pile 2. At the same time, due to the existence of the pile arm 18, the shear strength of the enlarged head 17 itself is greatly improved, and the enlarged head 17 is formed into a rigid enlarged head with reinforcement. At the same time, it can also reduce the sinking resistance, facilitate construction, and save construction time and construction costs.
[0049] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.
[0050] The meaning of "and / or" described in this application means that the situations where each exists alone or both exist at the same time are included.
[0051] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.
[0052] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A stiffening joint for a rear expansion arm of a pipe pile, characterized in that: The reinforced joint connects two adjacent pipe piles (2), and the reinforced joint comprises an upper joint (4) and a lower joint (5), wherein the upper joint (4) is located at the upper end of the pipe pile (2), and the lower joint (5) is located at the lower end of the pipe pile (2); The upper joint (4) comprises an upper joint body, a first upper reinforcing plate (7), a first grouting chamber (8), four first transverse top jacks (9), four first top plates (14), a first lower reinforcing plate (13), and a plurality of positioning holes (3-2); the first upper reinforcing plate (7) is located at the upper part of the upper joint body; the first grouting chamber (8) is arranged below the first upper reinforcing plate (7); the four first transverse top jacks (9) are located below the first grouting chamber (8); the four first transverse top jacks (9) are distributed in four directions along a horizontal plane; a first top plate (14) is arranged at the output end of each first transverse top jack (9); the first lower reinforcing plate (13) is arranged below the first transverse top jack (9); and a plurality of positioning holes (3-2) are provided on the first lower reinforcing plate (13); The lower joint (5) comprises a lower joint body, a second upper reinforcing plate (19), a plurality of positioning columns (3-1), a second grouting chamber (21), four second transverse top jacks (22), four second top plates (23), and a second lower reinforcing plate (20). The second upper reinforcing plate (19) is located at the upper part of the lower joint body. The second upper reinforcing plate (19) is provided with a positioning column (3-1) matched with the positioning hole (3-2). The second grouting chamber (21) is provided below the second upper reinforcing plate (19). The four second transverse top jacks (22) are located below the second grouting chamber (21). The four second transverse top jacks (22) are distributed in four directions along a horizontal plane. A second top plate (23) is provided at the output end of each second transverse top jack (22). The second lower reinforcing plate (20) is provided below the second transverse top jack (22).
2. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: The material of the upper joint (4) and the lower joint (5) is the same as that of the pipe pile (2), and the concrete strength of the upper joint (4) and the lower joint (5) is one level higher than the strength of the pile body.
3. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: The first upper reinforcing plate (7), the first lower reinforcing plate (13), the second upper reinforcing plate (19), and the second lower reinforcing plate (20) are all reinforced.
4. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: The diameter of the positioning hole (3-2) is between 30 mm and 60 mm, and the number of the positioning holes (3-2) is between 2 and 6.
5. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: The first grouting chamber (8) and the second grouting chamber (21) have the same structure, and both have circular or cross-shaped cross-sections and are hollow.
6. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 5, characterized in that: The first grouting chamber (8) is located in the upper half of the first top plate (14), and before the first horizontal top jack (9) is operated, the outer wall of the first grouting chamber (8) is tightly fitted to the first top plate (14); The second grouting chamber (21) is located in the upper half of the second top plate (23), and before the second horizontal top jack (22) is operated, the outer wall of the second grouting chamber (21) is tightly fitted to the second top plate (23).
7. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: The four first transverse top jacks (9) and the four second transverse top jacks (22) are all distributed in a cross shape.
8. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 7, characterized in that: A hydraulic conversion chamber (10) is provided in the middle of each of the four first transverse top jacks (9) and the four second transverse top jacks (22).
9. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 7, characterized in that: The oil pressure conversion chamber (10) is a hexahedron, the oil pressure conversion chamber (10) is connected to the oil pipe (16), and the four sides of the side wall of the oil pressure conversion chamber (10) are respectively connected to the first horizontal top jack (9) or the second horizontal top jack (22).
10. The rigid reinforcement joint for the rear expansion arm of a pipe pile according to claim 1, characterized in that: It also includes a plurality of grouting pipes (15), sealing joints (11), and a flow controller (12); the plurality of grouting pipes (15) are sequentially connected and extend from the external environment to the inside of the pipe pile (2), and are connected to the first grouting chamber (8) and the second grouting chamber (21) via the sealing joints (11); and a flow controller (12) is provided on each section of the grouting pipe (15).