Core filling structure for compression-resistant pile head of large-diameter prefabricated hollow pipe pile
By using core piles, pallets and grouting material layers on the compression-resistant pile heads of prefabricated hollow pipe piles, the problems of complex and low efficiency of core filling construction in the existing technology are solved, industrial production and green construction are achieved, and the improvement of the improvement of Construction efficiency and quality reliability.
Patent Information
- Application Number
- CN202420428735.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The existing prefabricated hollow pipe piles have complex core filling process, low efficiency, uneven physical quality, and easy to have problems such as insufficient core filling depth, uneven steel bar layout, uneven concrete pouring concrete, and leaking slurry, which affects the piles. The integrity and reliability of the connection between the head and the main structure.
The core filling structure of large diameter prefabricated hollow pipe piles is adopted to compressive pile heads, including core piles, pallets and grouting material layers. The core piles include steel cages, positioning ring plates and grouting pipes. The core piles are prefabricated in the factory and in The grouting material is filled on site through grouting pipes to achieve core filling of the pile head.
Through standardized production and construction, the workload of on-site production and pouring concrete is reduced, the quality of the solid structure is ensured, industrial production and green construction are achieved, and construction efficiency and quality reliability are improved.
Smart Images
Figure CN222477430U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of construction, and in particular relates to a large-diameter prefabricated hollow pipe pile compression pile head core filling structure. Background Art
[0002] Prestressed concrete pipe piles have the advantages of high bearing capacity, economy, environmental protection, reliable construction quality, convenience and speed, and are widely used in engineering construction. After the prefabricated hollow pipe pile compression pile excavation pile head elevation is in place, in order to increase the strength of the pile head, the integrity of the connection with the main structure and the waterproofness, the pile head needs to be filled with cast-in-place reinforced concrete.
[0003] The existing core filling construction process is complicated, inefficient, takes a long time to maintain, and has uneven quality. It is prone to common problems such as insufficient core filling depth, uneven steel bar arrangement, loose concrete pouring, and slurry leakage, which affect the integrity and reliability of the connection between the pile head and the main structure pedestal. Utility Model Content
[0004] In view of the shortcomings of the prior art, the utility model provides a large-diameter prefabricated hollow pipe pile compression pile head core filling structure, which can ensure the quality of the entity structure, realize industrialized production and green construction, and can be promoted and applied in actual projects.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a large-diameter prefabricated hollow pipe pile compression pile head core filling structure, including a core pile, a supporting plate, and a grouting material layer;
[0006] The core pile and the support plate are both arranged in the hollow pipe pile. The core pile includes a steel cage, a positioning ring plate, and a grouting pipe. The support plate is located below the steel cage. The grouting pipe is fixed to the steel cage and the support plate at the same time. A slurry outlet hole is provided on the side wall of the grouting pipe. A lap plate is fixed to the top of the positioning ring plate. The lap plate is overlapped on the top of the pile wall of the hollow pipe pile. The positioning ring plate is fixed to the steel cage. The grouting material layer is filled in the hollow pipe pile, and the grouting material layer is located above the support plate.
[0007] Preferably, the steel cage comprises a plurality of longitudinal bars and a plurality of stirrups, the longitudinal bars are fixed to the stirrups, and the positioning ring plate is fixed to the longitudinal bars.
[0008] Preferably, the plurality of longitudinal bars are evenly spaced apart in the circumferential direction, and the plurality of stirrups are evenly spaced apart in the vertical direction.
[0009] Preferably, the positioning ring plate is provided with a plurality of through holes, the plurality of through holes correspond one-to-one to the plurality of longitudinal ribs, and the longitudinal ribs are inserted into the corresponding through holes.
[0010] Preferably, the coaxial fixing sleeve on the outer side of the support plate is provided with an expansion water stop ring, and the outer side wall of the expansion water stop ring is gap-matched with the inner side wall of the hollow pipe pile.
[0011] Preferably, the top of the grouting pipe is 300 mm higher than the top of the hollow pipe pile.
[0012] Preferably, the support plate is spaced 100 mm from the steel cage.
[0013] Preferably, the support plate and the positioning ring plate are both steel plates.
[0014] Preferably, the grouting pipe is fixed to the support plate by welding.
[0015] Preferably, the support plate is provided with a through hole compatible with the grouting pipe, the grouting pipe passes through the through hole, the bottom of the grouting pipe is closed, the outer wall of the grouting pipe is provided with an external thread, the grouting pipe is screwed to a limiting nut through the external thread, and the support plate is overlapped on the limiting nut.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] The utility model provides a large-diameter prefabricated hollow pipe pile compression pile head core filling structure, wherein the core pile includes a steel cage, a positioning ring plate, and a grouting pipe, which can be prefabricated in a factory. During construction, the bottom of the grouting pipe is connected to the support plate, and then placed in the pipe cavity, so that the lap plate is overlapped on the top of the pile wall, and finally grouting is performed through the grouting pipe. In this way, the large-diameter prefabricated hollow pipe pile head core filling construction can be produced according to the standardized components, realize on-site standardized construction, reduce the workload of on-site production, tying steel bars and pouring concrete, ensure the quality of the entity structure, and realize industrialized production and green construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic front view of a large diameter prefabricated hollow pipe pile compression pile core filling structure provided in an embodiment of the utility model;
[0019] Figure 2 A schematic diagram of the top view of a positioning ring plate of a large-diameter prefabricated hollow pipe pile compression pile core filling structure provided in an embodiment of the utility model;
[0020] Figure 3 A schematic front view of the bottom end of a grouting pipe and related parts of a large-diameter prefabricated hollow pipe pile compression pile head core filling structure provided by an embodiment of the utility model;
[0021] Figure 4 A schematic front view of the bottom end of a grouting pipe and related parts of a large-diameter prefabricated hollow pipe pile compression pile head core filling structure provided by an embodiment of the utility model.
[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0023] 1. Hollow pipe pile; 2. Core pile; 3. Grouting pipe; 4. Support plate; 5. Expansion water stop ring; 6. Grouting material layer; 21. Longitudinal reinforcement; 22. Stirrups; 23. Positioning ring plate; 24. Overlap plate; 25. Through hole; 31. Grouting hole; 32. Limit nut. DETAILED DESCRIPTION
[0024] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.
[0025] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.
[0026] like Figure 1 As shown, this embodiment provides a large-diameter prefabricated hollow pipe pile compression pile head core filling structure, including a core pile 2, a support plate 4, and a grouting material layer 6;
[0027] The core pile 2 and the support plate 4 are both arranged in the hollow pipe pile 1. The core pile 2 includes a steel cage, a positioning ring plate 23, and a grouting pipe 3. The support plate 4 is located below the steel cage. The grouting pipe 3 is fixed to the steel cage and the support plate 4 at the same time. A grouting hole 31 is provided on the side wall of the bottom end of the grouting pipe 3. Four lap plates 24 are fixed to the top of the positioning ring plate 23. Figure 2 As shown, the four lap plates 24 are respectively located in front, back, left and right of the positioning ring plate 23, the outer diameter of the positioning ring plate 23 is smaller than the inner diameter of the hollow pipe pile 1, and the positioning ring plate 23 is coaxial with the hollow pipe pile 1, and the four lap plates 24 are all overlapped at the top of the pile wall of the hollow pipe pile 1, and the positioning ring plate 23 is fixed to the steel cage. The grouting material layer 6 is filled inside the hollow pipe pile 1, and the grouting material layer 6 is located above the support plate 4, the top of the grouting material layer 6 is flush with the bottom of the positioning ring plate 23, and the concrete strength of the grouting material layer 6 is at least one level higher than the strength of the main structure foundation, and has micro-expansion.
[0028] The core pile 2 can be prefabricated in a factory, that is, the steel cage, the positioning ring plate 23 and the grouting pipe 3 are an integrated structure, that is, the relative positions of the steel cage, the positioning ring plate 23 and the grouting pipe 3 are fixed. In this way, during construction, after the prefabricated hollow pipe pile compression pile excavation pile head elevation is constructed in place, the floating slurry on the inner wall of the pile head tube cavity is cleaned and brushed with pure cement slurry. Then, according to the outer diameter D and wall thickness t of the hollow pipe pile 1, a suitable core pile 2 is selected, and then the core pile 2 is straightened and placed into the hollow pipe pile 1. After the lowering depth is in place, the four lap plates 24 are overlapped on the top of the pile wall of the hollow pipe pile 1, thereby limiting the core pile 2. Then, a professional grouting tool is used to connect the grouting pipe 3, and grouting is performed through the grouting pipe 3, so that the grouting material flows out from the grouting hole 31 to fill the gap between the core pile 2 and the hollow pipe pile 1. The grouting material gradually rises from the support plate 4 until it is filled and dense to the pile head elevation, and the grouting is stopped. After the grouting material is cured, the pile head core filling work is completed.
[0029] In this embodiment, the steel cage includes a plurality of longitudinal bars 21 and a plurality of stirrups 22, the longitudinal bars 21 and the stirrups 22 can be welded and fixed, the top of the longitudinal bars 21 extends into the cap, the plurality of longitudinal bars 21 are arranged evenly spaced along the circumference with the axis of the hollow pipe pile 1 as the center, and the plurality of stirrups 22 are evenly spaced along the vertical direction. The grouting pipe 3 can be connected and fixed to one of the stirrups 22 by steel bars.
[0030] The outer diameter of the core pile 2 can be D1=d-40mm, d is the inner diameter of the hollow pipe pile 1, and for the convenience of industrial production, a 50mm modulus can be taken, and the minimum diameter is 300mm; the length L of the core pile 2 can be 3 times of D, and for the convenience of industrial production, a 100mm modulus can be taken, and the minimum length is 1500mm. Specifically, the parameters of the various components of the core pile 2 can be taken according to Table 1.
[0031] Table 1
[0032]
[0033] For example, when the outer diameter D of the hollow pipe pile 1 is 600 mm and the wall thickness t is 110 or 130 mm, the core pile 2 that can be used has an outer diameter D1 of 300 mm and a length L of 1800 mm, and the longitudinal reinforcements are made of 6 third-grade steels with a diameter of 16 mm, and the stirrups are made of third-grade steel with a diameter of 8 mm, and the spacing between two adjacent stirrups is 200 mm;
[0034] When the outer diameter D of the hollow pipe pile 1 is 1200 mm and the wall thickness t is 150 mm, the core pile 2 that can be used has an outer diameter D1 of 850 mm and a length L of 3600 mm. The longitudinal reinforcements are 10 third-grade steels with a diameter of 20 mm, the stirrups are third-grade steels with a diameter of 10 mm, and the spacing between two adjacent stirrups is 200 mm.
[0035] In this embodiment, the positioning ring plate 23 may be a steel plate, and the positioning ring plate 23 and the longitudinal ribs 21 may be fixed by welding. Figure 2 As shown, the positioning ring plate 23 may be provided with a plurality of through holes 25 , and the plurality of through holes 25 correspond one-to-one to the plurality of longitudinal ribs 21 , and the longitudinal ribs 21 are inserted into the corresponding through holes 25 .
[0036] In this embodiment, an expansion water stop ring 5 can be coaxially fixedly sleeved on the outer side of the support plate 4, and the outer wall of the expansion water stop ring 5 is gap-matched with the inner wall of the hollow pipe pile 1. During construction, the expansion water stop ring 5 is first sleeved on the outer side of the support plate 4, and then the support plate 4 and the core pile 2 are placed in the hollow pipe pile 1. During grouting, the expansion water stop ring 5 expands and closes the bottom tube cavity of the core pile 2 after encountering water, which can prevent the grouting material from flowing out of the gap between the support plate 4 and the core pile 2.
[0037] In this embodiment, the top of the grouting pipe 3 is 300 mm higher than the top of the hollow pipe pile 1. The support plate 4 is spaced 100 mm from the steel cage, so that there is enough space during construction.
[0038] like Figure 3 As shown, the support plate 4 can be a steel plate. The grouting pipe 3 can be welded and fixed to the support plate 4.
[0039] like Figure 4 As shown, the support plate 4 may be provided with a through hole matched with the grouting pipe 3, the grouting pipe 3 passes through the through hole, the bottom of the grouting pipe 3 is closed, the outer wall of the grouting pipe 3 is provided with an external thread, the grouting pipe 3 is screwed with a limit nut 32 through the external thread, and the support plate 4 is overlapped on the limit nut 32. In this way, during construction, the grouting pipe 3 is passed through the through hole, and then the limit nut 32 is tightened, which is convenient and quick to install.
[0040] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.
[0041] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0042] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A large diameter prefabricated hollow pipe pile compression pile head core filling structure, characterized in that: It comprises a core pile (2), a support plate (4), and a grouting material layer (6); The core pile (2) and the support plate (4) are both arranged in the hollow pipe pile (1); the core pile (2) comprises a steel cage, a positioning ring plate (23), and a grouting pipe (3); the support plate (4) is located below the steel cage; the grouting pipe (3) is fixed to the steel cage and the support plate (4) at the same time; a grouting hole (31) is provided on the side wall of the grouting pipe (3); a lap plate (24) is fixed to the top of the positioning ring plate (23); the lap plate (24) is overlapped on the top of the pile wall of the hollow pipe pile (1); the positioning ring plate (23) is fixed to the steel cage; the grouting material layer (6) is filled in the hollow pipe pile (1), and the grouting material layer (6) is located above the support plate (4).
2. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1 is characterized in that: The steel cage comprises a plurality of longitudinal bars (21) and a plurality of stirrups (22); the longitudinal bars (21) are fixed to the stirrups (22); and the positioning ring plate (23) is fixed to the longitudinal bars (21).
3. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 2 is characterized in that: The plurality of longitudinal bars (21) are evenly spaced apart in the circumferential direction, and the plurality of stirrups (22) are evenly spaced apart in the vertical direction.
4. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 2 is characterized in that: The positioning ring plate (23) is provided with a plurality of through holes (25), the plurality of through holes (25) correspond one-to-one to the plurality of longitudinal ribs (21), and the longitudinal ribs (21) are inserted into the corresponding through holes (25).
5. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1 is characterized in that: An expansion water stop ring (5) is provided on the coaxial fixing sleeve outside the support plate (4), and the outer wall of the expansion water stop ring (5) is clearance-matched with the inner wall of the hollow pipe pile (1).
6. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1 is characterized in that: The top end of the grouting pipe (3) is 300 mm higher than the top end of the hollow pipe pile (1).
7. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1 is characterized in that: The support plate (4) is spaced 100 mm from the steel cage.
8. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1 is characterized in that: The support plate (4) and the positioning ring plate (23) are both steel plates.
9. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1, characterized in that: The grouting pipe (3) is fixed to the supporting plate (4) by welding.
10. The large-diameter prefabricated hollow pipe pile compression pile head core filling structure according to claim 1, characterized in that: The support plate (4) is provided with a through hole matched with the grouting pipe (3), the grouting pipe (3) passes through the through hole, the bottom of the grouting pipe (3) is closed, the outer wall of the grouting pipe (3) is provided with an external thread, the grouting pipe (3) is screwed to a limiting nut (32) via the external thread, and the support plate (4) is overlapped on the limiting nut (32).