Pile head hollow pre-embedding device

Abstract

The utility model relates to a pile head hollow pre-embedding device, and belongs to the technical field of cast-in-place pile construction. Comprising a steel casing placed at the top end in a reinforcement cage, the reinforcement cage is placed in an outer casing, the upper end of the inner side of the reinforcement cage is fixedly connected with a fixed stirrup, and the steel casing comprises a circular base and four sets of fan-shaped columns. When concrete is poured, the steel casing is placed at the top end of the interior of the reinforcement cage in advance, so that the poured and formed pile head is in a blocked state, a constructor can perform pile breaking operation more conveniently, and the pile breaking efficiency is improved. And meanwhile, the outer sides of the vertical ribs of the reinforcement cage are movably sleeved with the PVC sleeves, the binding force between the concrete and the vertical ribs is remarkably reduced through the PVC sleeves, and when a constructor breaks the pile, the concrete and the vertical ribs can be more easily stripped. Due to the good separability, the risk of damage to the vertical ribs is remarkably reduced, and deformation or damage of the reinforcing steel bars caused in the pile breaking process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-in-place pile construction, in particular to a hollow pre-embedded device for a pile head. Background Art

[0002] During cast-in-place pile construction, to ensure the density of the pile body, the pile is usually overfilled. After the cast-in-place pile construction is completed, the pile head needs to be processed to reach the designed elevation. This process is called pile breaking, and its purpose is to remove excess or substandard pile head concrete.

[0003] Traditionally, pile head removal is performed manually or with the assistance of small mechanical forces. However, due to the solid and bulky nature of the pile head, this method is inefficient and often requires significant manpower and time. Furthermore, the pile removal process can easily damage the vertical reinforcement of the steel cage, causing deformation. Utility Model Content

[0004] In order to solve the above technical problems, the present invention provides a hollow pile head pre-embedded device. The technical solution of the present invention is as follows:

[0005] A hollow pre-buried pile head device, comprising a steel casing placed at the top of a steel cage, the steel cage placed in an outer casing, the outer sides of the vertical bars of the steel cage are movably sleeved with PVC sleeves, the inner upper end of the steel cage is fixedly connected to fixed stirrups, the steel casing comprises a circular base and four groups of fan-shaped columns, a center hole is opened through the center position of the surface of the circular base, a sleeve for placing a catheter is fixedly connected to the inside of the center hole, the four groups of fan-shaped columns are arranged in an annular array on the lower surface of the circular base, and the inner sides of the four groups of fan-shaped columns together form a center for accommodating the catheter A filling bin is formed between each two adjacent groups of fan-shaped columns, and the central filling bin is connected to the outer filling bin. The circular base is fixed to the fixed stirrups by four groups of anti-floating hooks, and four groups of arc-shaped positioning plates are placed between the outer casing and the steel cage. The arc-shaped positioning plates are tightly attached to the inner wall of the outer casing, and the lower surface of the arc-shaped positioning plates is flush with the lower surface of the fan-shaped columns. The upper surface of the arc-shaped positioning plates is fixedly connected to connecting rods, and the upper surface of the circular base is fixedly connected to four groups of support rods, and the four groups of connecting rods are respectively fixed to the four groups of support rods.

[0006] Optionally, four groups of through holes are equidistantly opened on the surface of the circular base, and the through holes are located between two adjacent groups of fan-shaped columns. The anti-floating hook includes an L-shaped bracket, and the vertical edge of the L-shaped bracket is movably placed inside the through hole. The horizontal edge of the L-shaped bracket is fixedly connected with a U-shaped clip, and the U-shaped clip is fastened to the outside of the fixed stirrup. A nut is provided on the outside of the vertical edge of the L-shaped bracket through an external thread, and the nut abuts against the upper surface of the circular base.

[0007] Optionally, a fixing hole is provided on one side of the upper end of the connecting rod, and a C-shaped seat is fixedly connected to one end of the support rod close to the connecting rod. The C-shaped seat is buckled on the outer side of the top end of the connecting rod, and a threaded hole is provided on one side of the C-shaped seat. The internal thread of the threaded hole is connected to a bolt, and the bolt passes through the threaded hole and abuts against the inside of the fixing hole.

[0008] Optionally, a side of the connecting rod close to the supporting rod is fixedly connected to a limiting block, and an inner side of the opening of the C-shaped seat is provided with a limiting groove for cooperating with the limiting block.

[0009] Optionally, a plurality of sets of hanging rings are fixedly connected to the upper surface of the circular base.

[0010] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations.

[0011] By means of the above solution, the beneficial effects of the present invention are as follows:

[0012] 1. During the concrete pouring process, the present invention pre-places a steel casing at the top of the reinforcement cage, resulting in a segmented pile head after pouring. This allows construction workers to more easily perform pile breaking operations, improving pile breaking efficiency. PVC sleeves are also installed on the outer sides of the vertical bars of the reinforcement cage. The use of these sleeves significantly reduces the bonding force between the concrete and the vertical bars, allowing construction workers to more easily separate the concrete from the bars during pile breaking. This excellent separation significantly reduces the risk of damage to the vertical bars and avoids deformation or damage to the steel bars caused by the pile breaking process.

[0013] 2. The position of the curved positioning plate is the elevation of the cast-in-place pile. Construction workers can break the pile according to the position of the curved positioning plate, reducing the time required for positioning. During the pile breaking process, construction workers can first peel the curved positioning plate from the concrete, thereby effectively separating the pile breaking area from the non-pile breaking area.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall appearance and structure of the hollow pile head pre-embedded device provided by the utility model;

[0016] Figure 2 A top view of the hollow pre-embedded pile head device provided by the utility model;

[0017] Figure 3 A bottom view of the hollow pile head pre-embedded device provided by the utility model;

[0018] Figure 4 A cross-sectional view of the hollow pre-embedded pile head device provided by the present utility model;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the hollow pre-embedded pile head device provided by the utility model;

[0020] Figure 6 This is a schematic diagram of the exploded structure of the steel casing, anti-floating hook, arc-shaped positioning plate and lifting ring in the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the steel casing in the utility model;

[0022] Figure 8 It is a schematic structural diagram of the matching arc-shaped positioning plate, connecting rod and supporting rod in the utility model.

[0023] Numbers in the figure: 1. Steel cage; 11. Fixed stirrups; 2. Outer casing; 3. Steel casing; 31. Circular base; 311. Center hole; 312. Through hole; 32. Fan-shaped column; 33. Center filling bin; 34. Outer filling bin; 35. Sleeve; 4. Anti-floating hook; 41. L-shaped bracket; 411. External thread; 42. U-shaped buckle; 43. Nut; 5. Arc-shaped positioning plate; 51. Connecting rod; 511. Fixing hole; 512. Limit block; 52. Support rod; 521. C-shaped seat; 522. Threaded hole; 523. Bolt; 524. Limit groove; 6. Lifting ring; 7. Conduit. DETAILED DESCRIPTION

[0024] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] See also Figure 1-8The utility model provides a hollow pre-embedded pile head device, including a steel casing 3 placed at the top end of a steel cage 1, the steel cage 1 is placed in an outer casing 2, the outer sides of the vertical bars of the steel cage 1 are movably sleeved with PVC sleeves, the upper end of the inner side of the steel cage 1 is fixedly connected with fixed stirrups 11, the steel casing 3 includes a circular base 31 and four groups of fan-shaped columns 32, a center hole 311 is opened through the center position of the surface of the circular base 31, and a sleeve 35 for placing a guide tube 7 is fixedly connected to the inside of the center hole 311, the four groups of fan-shaped columns 32 are arranged in an annular array on the lower surface of the circular base 31, and the inner sides of the four groups of fan-shaped columns 32 together form a space for accommodating the guide tube 7. The central filling bin 33 of the tube 7, an outer filling bin 34 is formed between each adjacent two groups of sector columns 32, the central filling bin 33 is connected to the outer filling bin 34, the circular base 31 is fixed to the fixed stirrups 11 through four groups of anti-floating hooks 4, four groups of arc-shaped positioning plates 5 are placed between the outer casing 2 and the steel cage 1, the arc-shaped positioning plates 5 are close to the inner wall of the outer casing 2, the lower surface of the arc-shaped positioning plates 5 is flush with the lower surface of the sector columns 32, the upper surface of the arc-shaped positioning plates 5 is fixedly connected to the connecting rod 51, the upper surface of the circular base 31 is fixedly connected to four groups of support rods 52, and the four groups of connecting rods 51 are respectively fixed to the four groups of support rods 52.

[0026] During concrete pouring, the present invention pre-places the steel casing 3 at the top of the inner reinforcement cage 1 (the over-filling area). This allows the poured pile head to be in a segmented state, making it easier for construction workers to break the pile and improving pile breaking efficiency. Furthermore, the PVC sleeves that are movably mounted on the outside of the vertical bars of the reinforcement cage 1 make it easier to separate the concrete from the vertical bars during the pile breaking process, significantly reducing damage to the bars.

[0027] Specifically, before lowering the steel cage 1, a PVC sleeve is placed on the outside of the vertical reinforcement and fixed with tape to facilitate the subsequent peeling of the concrete and vertical reinforcement. Next, the steel casing 3 is hoisted into the interior of the steel cage 1 and fixed with the anti-floating hook 4 and the fixed stirrup 11. Then, the conduit 7 is inserted from the center hole 311 into the center filling bin 33 for concrete pouring. At this time, the concrete flows along the center filling bin 33 to the outer filling bin 34, and then overflows between the outer casing 2 and the steel casing 3. Among them, when lowering the steel casing 3, the construction personnel need to determine the position of the steel casing 3 according to the design elevation of the bored pile (the area of the steel casing 3 is the over-pouring area, and is equivalent to the subsequent broken pile area). After the bored pile is initially solidified, the construction personnel release the fixation between the anti-floating hook 4 and the circular base 31, and at the same time release the fixation between the support rod 52 and the connecting rod 51, and then the steel casing 3 can be lifted.

[0028] Specifically, the steel casing 3 is indirectly fixed to the steel cage 1 by the anti-floating hook 4 and the fixing stirrup 11. In this way, when pouring concrete, the position of the steel casing 3 can be kept stable to prevent the steel casing 3 from floating.

[0029] Specifically, the position of the curved positioning plates 5 corresponds to the elevation of the cast-in-place pile. Construction workers can break the pile based on the position of the curved positioning plates 5, reducing the time required for positioning. During the pile breaking process, the curved positioning plates 5 can be peeled off from the concrete first, effectively separating the pile breaking area from the non-pile breaking area. The four sets of curved positioning plates 5 together form a complete ring, making it easier for construction workers to quickly peel off and remove the curved positioning plates 5 during pile breaking.

[0030] Furthermore, four groups of through holes 312 are equidistantly opened on the surface of the circular base 31, and the through holes 312 are located between two adjacent groups of fan-shaped columns 32. The anti-floating hook 4 includes an L-shaped bracket 41, and the vertical edge of the L-shaped bracket 41 is movably placed inside the through hole 312. The horizontal edge of the L-shaped bracket 41 is fixedly connected with a U-shaped clip 42, and the U-shaped clip 42 is buckled on the outside of the fixed stirrup 11. The outside of the vertical edge of the L-shaped bracket 41 is provided with a nut 43 through an external thread 411, and the nut 43 abuts against the upper surface of the circular base 31.

[0031] Specifically, after the steel casing 3 is hoisted to a suitable position, the L-shaped bracket 41 is manually rotated to engage the U-shaped buckle 42 with the fixed stirrup 11, and then the nut 43 is tightened. At this time, the steel casing 3 is firmly fixed to the fixed stirrup 11 through the anti-floating hook 4. When the steel casing 3 needs to be removed, it is only necessary to unscrew the nut 43 and lift the steel casing 3 upward. The L-shaped bracket 41 will gradually disengage from the through hole 312, thereby smoothly removing the steel casing 3.

[0032] Furthermore, a fixing hole 511 is provided on one side of the upper end of the connecting rod 51, and a C-shaped seat 521 is fixedly connected to one end of the support rod 52 close to the connecting rod 51. The C-shaped seat 521 is buckled on the outer side of the top end of the connecting rod 51, and a threaded hole 522 is provided on one side of the C-shaped seat 521. The internal thread of the threaded hole 522 is connected to a bolt 523, and the bolt 523 passes through the threaded hole 522 and abuts against the inside of the fixing hole 511.

[0033] Specifically, when lowering the steel casing 3, the connecting rod 51 and the support rod 52 need to be fixed with bolts 523 to ensure that the arc-shaped positioning plate 5 does not shift during the concrete pouring process. When the steel casing 3 needs to be removed, since the arc-shaped positioning plate 5 and the connecting rod 51 will be poured into the concrete, the bolts 523 used to fix the connecting rod 51 and the support rod 52 need to be removed, so that the connecting rod 51 and the support rod 52 can be disassembled, thereby conveniently removing the steel casing 3.

[0034] Furthermore, a side of the connecting rod 51 close to the supporting rod 52 is fixedly connected to the limiting block 512 , and a limiting groove 524 for cooperating with the limiting block 512 is formed on the inner side of the opening of the C-shaped seat 521 .

[0035] Specifically, the cooperation between the limiting block 512 and the limiting groove 524 makes the connection structure between the connecting rod 51 and the supporting rod 52 more stable, thereby ensuring that the arc-shaped positioning plate 5 will not shift during the concrete pouring process.

[0036] Furthermore, a plurality of sets of hanging rings 6 are fixedly connected to the upper surface of the circular base 31 .

[0037] Specifically, through the lifting ring 6, the construction workers can quickly lift the steel casing 3.

[0038] The above is only a preferred embodiment of the present invention and is not intended to limit 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 technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A hollow pile head embedded device, characterized by: The invention comprises a steel casing (3) placed at the top end of a steel cage (1), the steel cage (1) is placed in an outer casing (2), the outer sides of the vertical bars of the steel cage (1) are movably sleeved with PVC sleeves, the inner upper end of the steel cage (1) is fixedly connected with fixed stirrups (11), the steel casing (3) comprises a circular base (31) and four groups of fan-shaped columns (32), a central hole (311) is provided through the center position of the surface of the circular base (31), a sleeve (35) for placing a catheter (7) is fixedly connected inside the central hole (311), the four groups of fan-shaped columns (32) are arranged in an annular array on the lower surface of the circular base (31), and the inner sides of the four groups of fan-shaped columns (32) jointly form a central filling bin (33) for accommodating the catheter (7), each An outer filling bin (34) is formed between two adjacent groups of the sector columns (32), and the central filling bin (33) is connected to the outer filling bin (34). The circular base (31) is fixed to the fixed stirrups (11) through four groups of anti-floating hooks (4). Four groups of arc-shaped positioning plates (5) are placed between the outer casing (2) and the steel cage (1). The arc-shaped positioning plates (5) are tightly attached to the inner side wall of the outer casing (2). The lower surface of the arc-shaped positioning plates (5) is flush with the lower surface of the sector columns (32). The upper surface of the arc-shaped positioning plates (5) is fixedly connected to a connecting rod (51). The upper surface of the circular base (31) is fixedly connected to four groups of support rods (52). The four groups of connecting rods (51) are respectively fixed to the four groups of support rods (52).

2. A hollow pile head pre-embedded device according to claim 1, characterized in that: The surface of the circular base (31) is equidistantly penetrated with four groups of through holes (312), and the through holes (312) are located between two adjacent groups of fan-shaped columns (32). The anti-floating hook (4) includes an L-shaped bracket (41), and the vertical edge of the L-shaped bracket (41) is movably placed inside the through hole (312). The horizontal edge of the L-shaped bracket (41) is fixedly connected with a U-shaped buckle (42), and the U-shaped buckle (42) is buckled on the outside of the fixed stirrup (11). The vertical edge of the L-shaped bracket (41) is sleeved with a nut (43) through an external thread (411), and the nut (43) abuts against the upper surface of the circular base (31).

3. A hollow pile head pre-embedded device according to claim 1, characterized in that: A fixing hole (511) is provided on one side of the upper end of the connecting rod (51); a C-shaped seat (521) is fixedly connected to one end of the supporting rod (52) close to the connecting rod (51); the C-shaped seat (521) is buckled on the outer side of the top end of the connecting rod (51); a threaded hole (522) is provided through one side of the C-shaped seat (521); a bolt (523) is threadedly connected to the inside of the threaded hole (522); the bolt (523) passes through the threaded hole (522) and abuts against the inside of the fixing hole (511).

4. A hollow pile head pre-embedded device according to claim 3, characterized in that: The connecting rod (51) is fixedly connected to a limiting block (512) on one side close to the supporting rod (52), and a limiting groove (524) for cooperating with the limiting block (512) is provided on the inner side of the opening of the C-shaped seat (521).

5. A hollow pile head pre-embedded device according to claim 1, characterized in that: The upper surface of the circular base (31) is fixedly connected to a plurality of sets of hanging rings (6).

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