Quick-release type large-diameter pile reinforcement cage inner supporting device

Abstract

The utility model relates to a quick release type large-diameter pile reinforcement cage inner supporting device which comprises an inner supporting steel pipe. The two ends of the inner supporting steel pipes are fixed to annular stirrups of the reinforcement cage through installation assemblies, the two ends of the inner supporting steel pipes are located on the intersection points of the annular stirrups of the reinforcement cage and vertical ribs, and each annular stirrup is provided with two inner supporting steel pipes. The two inner supporting steel pipes are located on the two opposite end faces of the annular stirrup correspondingly and distributed in a staggered mode. The inner supporting steel pipe and the installation assembly are used in cooperation, machining is convenient, the weight is light, gas cutting and electric welding are not needed in the dismantling process, the steel pipe is light in dead weight and not prone to falling off, safety is remarkably improved, flexible adjustment can be achieved according to the pile diameter, applicability is high, loss is almost avoided, carbon is low, environment friendliness is achieved, and universality is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of installation and construction of reinforcing cages for large-diameter bored piles, and particularly relates to a quick-release internal support device for large-diameter pile reinforcing cages. Background Technology

[0002] According to Chapter 2 of the "Technical Specification for Construction of Highway Bridges and Culverts" (JTGT3650-2020), cast-in-place piles with a diameter greater than or equal to 2.2m are called large-diameter cast-in-place piles. To ensure that the deformation of the reinforcing cage is controllable during the fabrication, transportation and hoisting process, the design drawings often use threaded steel bars with a diameter of 28mm or more, and weld them to the reinforcing ring of the reinforcing cage in the form of "triangular bracing" to improve the overall rigidity of the reinforcing cage.

[0003] Because the "triangular bracing" significantly reduces the space inside the rebar cage, to prevent "pipe jamming" and subsequent pouring accidents during hole cleaning and concrete pouring, the reinforcing "triangular bracing" must be removed when inserting the rebar into the hole during segmented installation on site. Generally, this is done on-site by flame cutting or electric welding, followed by manual removal of the reinforcing steel bars. The following problems may be encountered during rebar cage installation:

[0004] 1) Unsafe construction: Large-diameter pile reinforcement cages generally bear large loads, and the vertical reinforcement spacing is usually small. The on-site working environment is harsh. When using gas cutting or electric welding to cut the "triangular brace" reinforcement, the operating space is small, which can easily cause personnel injury.

[0005] 2) Impact on quality: Since the reinforcing bars of the "triangular brace" are generally made of threaded steel bars with a diameter of 28mm or more, they are heavy and easily fall into the hole during the cutting process and manual extraction of the reinforcing cage, thus causing pile foundation quality problems.

[0006] 3) Significant waste: The steel bars of the "triangular brace" are subject to significant losses during cutting and installation, resulting in waste, increased construction costs, and inconsistent with current concepts of low carbon, environmental protection, and sustainable development. Summary of the Invention

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a quick-release internal support device for large-diameter pile reinforcement cages, so as to solve the quality and safety problems that may be caused during the installation and disassembly of the "triangular brace" of large-diameter pile reinforcement cages.

[0008] The purpose of this utility model is achieved through the following technical solution: This quick-release large-diameter pile reinforcement cage internal support device includes an internal support steel pipe; both ends of the internal support steel pipe are fixed to the ring stirrups of the reinforcement cage by installation components, and both ends of the internal support steel pipe are located at the intersection of the ring stirrups and the vertical bars of the reinforcement cage. Two internal support steel pipes are installed on each ring stirrup, and the two internal support steel pipes are located on the opposite end faces of the ring stirrup and are staggered.

[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, the combination of internal support steel pipe and installation components makes processing convenient and lightweight. No gas cutting or electric welding is required during dismantling. Moreover, the steel pipe is lightweight and not easy to fall off, which significantly improves safety. It can be flexibly adjusted according to the pile diameter, has strong applicability, almost no loss, is low-carbon, environmentally friendly, and highly versatile.

[0010] Preferably, the two inner supporting steel pipes on the ring stirrups are arranged in a cross shape, and the inner supporting steel pipes on adjacent ring stirrups and distributed along the axial direction of the steel cage are also arranged in a cross shape. The cross shape arrangement makes the support force on a certain section of the steel cage more uniform, and the staggered arrangement of the inner supporting steel pipes on adjacent ring stirrups makes the support force distribution of the entire steel cage more uniform.

[0011] Preferably, each end of the inner support steel pipe is provided with two through holes, which penetrate the pipe wall of the inner support steel pipe. The installation assembly fixes the inner support steel pipe to the ring stirrups of the reinforcing cage by means of bolts passing through the through holes. By providing two through holes at each end of the inner support steel pipe, the inner support steel pipe can be well fixed to the ring stirrups, resulting in better stability.

[0012] Preferably, the mounting assembly includes a pressure plate located on the end face of the ring stirrup and distributed opposite to the inner support steel pipe; by setting the pressure plate, a stable installation and fixation can be achieved between the inner support steel pipe and the ring stirrup.

[0013] Preferably, the pressure plate has two mounting holes for inserting the bolt assembly, and the distance between the mounting holes is greater than the diameter of the ring stirrup. The mounting holes are racetrack-shaped. By opening the above two racetrack-shaped mounting holes on the pressure plate, it is convenient to adjust the insertion position of the bolt assembly between the inner support steel pipe and the ring stirrup.

[0014] Preferably, the bolt assembly includes a bolt, a nut, and a washer. The washer is placed at the tail of the bolt and passes through the through hole, with the head of the bolt extending out of the circumferential stirrup of the reinforcing cage. The nut is screwed onto the head of the bolt and abuts against the pressure plate. The above structure improves the installation stability between the inner support steel pipe and the circumferential stirrup.

[0015] Preferably, reinforcing ribs are welded at the intersection of the circumferential stirrups and the vertical ribs, and the reinforcing ribs are located at the two adjacent intersections of the circumferential stirrups and the vertical ribs at the end of the inner support steel pipe. With the above structure, due to the supporting force of the inner support steel pipe, during the lifting of the steel cage, there may be detachment or deformation at the two adjacent intersections of the inner support steel pipe, that is, the welding points of the circumferential stirrups and the vertical ribs. By setting the reinforcing ribs, this phenomenon can be greatly prevented. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the quick-release large-diameter pile reinforcement cage internal support device of this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of the internal support steel pipe of this utility model.

[0018] Figure 3 This is a schematic diagram of the main structure of the pressure plate of this utility model.

[0019] Figure 4 This is a schematic diagram of the actual application structure of the quick-release large-diameter pile reinforcement cage internal support device of this utility model.

[0020] The labels in the attached diagram are as follows: 1. Internal support steel pipe; 2. Installation component; 3. Reinforcing cage; 4. Bolt assembly; 5. Reinforcing bar; 11. Through hole; 21. Pressure plate; 22. Mounting hole; 31. Hoop; 32. Vertical bar; 41. Bolt; 42. Nut; 43. Washer. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 4 As shown, this utility model includes an inner supporting steel pipe 1; both ends of the inner supporting steel pipe 1 are fixed to the ring stirrups 31 of the reinforcing cage 3 by the installation components 2, and the two ends of the inner supporting steel pipe 1 are located at the intersection of the ring stirrups 31 and the vertical bars 32 of the reinforcing cage 3. Two inner supporting steel pipes 1 are installed on each ring stirrup 31, and the two inner supporting steel pipes 1 are located on opposite end faces of the ring stirrups 31 and are staggered. Easy to process and lightweight: The structure uses common bulk materials available on the market, making procurement easy, and the processing technology is mature and convenient. It has high overall rigidity and is flexible for on-site adjustment. Good performance: In practice, the inner support is simple to install and dismantle, and can be quickly completed by one worker. The reinforcing cage hardly deforms during hoisting, resulting in good performance. Safe and reliable: No gas cutting or electric welding is required during dismantling, and the steel pipe is lightweight and not easy to fall, significantly improving safety. High versatility: It can be flexibly adjusted according to the pile diameter, has strong applicability, almost no loss, and is low-carbon and environmentally friendly.

[0022] The two inner supporting steel pipes 1 on the ring stirrup 31 are arranged in a cross shape, and the inner supporting steel pipes 1 on adjacent ring stirrups 31 and distributed along the axial direction of the steel cage are also arranged in a cross shape.

[0023] Two through holes 11 are provided at both ends of the inner support steel pipe 1. The through holes 11 penetrate the pipe wall of the inner support steel pipe 1. The installation component 2 fixes the inner support steel pipe 1 to the ring stirrup 31 of the steel cage 3 by passing the bolt component 4 through the through holes 11.

[0024] The mounting assembly 2 includes a pressure plate 21, which is located on the end face of the hoop 31 and is distributed relative to the inner support steel pipe 1.

[0025] The pressure plate 21 has two mounting holes 22 for inserting the bolt assembly 4, and the hole spacing between the mounting holes 22 is greater than the diameter of the stirrup 31. The mounting holes 22 are racetrack-shaped mounting holes 22.

[0026] The bolt assembly 4 includes a bolt 41, a nut 42 and a washer 43. The washer 43 is placed at the tail of the bolt 41 and passes through the through hole 11 so that the head of the bolt 41 extends out of the ring stirrup 31 of the reinforcing cage 3. The nut 42 is screwed onto the head of the bolt 41 and abuts against the pressure plate 21.

[0027] A reinforcing rib 5 is welded at the intersection of the circumferential stirrup 31 and the vertical rib 32, and the reinforcing rib 5 is located at the two adjacent intersections of the circumferential stirrup 31 and the vertical rib 32 at the end of the inner support steel pipe 1.

[0028] The installation principle of this utility model is as follows: First, the fabricated steel cage is laid flat, and reinforcing bars 5 are welded to the two adjacent intersections of the ring stirrups 31 and the vertical bars 32 at the end of the inner support steel pipe 1; then, the support steel pipe 1, which is adapted to the diameter of the steel cage, is placed on the intersection of the ring stirrups 31 and the vertical bars 32, and is fixed by inserting the pressure plate 21 and bolt assembly 4 through the two through holes 11. The other end is operated in the same way; finally, each ring stirrup 31 distributed along the axial direction of the steel cage is operated through the above steps, and the adjacent inner support steel pipes 1, which are distributed in a cross shape, are staggered.

[0029] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quick-release large-diameter pile reinforcement cage internal support device, comprising an internal support steel pipe (1); characterized in that: Both ends of the inner support steel pipe (1) are fixed to the ring stirrups (31) of the steel cage (3) by the installation component (2), and both ends of the inner support steel pipe (1) are located at the intersection of the ring stirrups (31) and the vertical bars (32) of the steel cage (3). Two inner support steel pipes (1) are installed on each ring stirrup (31), and the two inner support steel pipes (1) are located on the opposite end faces of the ring stirrups (31) and are staggered.

2. The quick-release large-diameter pile reinforcement cage internal support device according to claim 1, characterized in that: The two inner supporting steel pipes (1) on the ring stirrup (31) are arranged in a cross shape, and the inner supporting steel pipes (1) on the adjacent ring stirrups (31) and distributed along the axial direction of the steel cage (3) are all arranged in a cross shape.

3. The quick-release large-diameter pile reinforcement cage internal support device according to claim 1, characterized in that: The inner support steel pipe (1) has two through holes (11) at both ends. The through holes (11) penetrate the pipe wall of the inner support steel pipe (1). The installation assembly (2) fixes the inner support steel pipe (1) to the ring stirrup (31) of the steel cage (3) by passing through the through holes (11) with bolt assembly (4).

4. The quick-release large-diameter pile reinforcement cage internal support device according to claim 3, characterized in that: The installation assembly (2) includes a pressure plate (21) located on the end face of the ring stirrup (31) and distributed relative to the inner support steel pipe (1).

5. The quick-release large-diameter pile reinforcement cage internal support device according to claim 4, characterized in that: The pressure plate (21) has two mounting holes (22) for inserting the bolt assembly (4), and the hole spacing between the mounting holes (22) is greater than the diameter of the ring stirrup (31). The mounting holes (22) are racetrack-shaped mounting holes (22).

6. The quick-release large-diameter pile reinforcement cage internal support device according to claim 4, characterized in that: The bolt assembly (4) includes a bolt (41), a nut (42) and a washer (43). The washer (43) is placed at the tail of the bolt (41) and passes through the through hole (11) so that the head of the bolt (41) extends out of the hoop (31) of the steel cage (3). The nut (42) is screwed onto the head of the bolt (41) and abuts against the pressure plate (21).

7. The quick-release large-diameter pile reinforcement cage internal support device according to claim 1, characterized in that: A reinforcing bar (5) is welded at the intersection of the circumferential stirrup (31) and the vertical bar (32), and the reinforcing bar (5) is located at the two adjacent intersections of the intersection of the circumferential stirrup (31) and the vertical bar (32) at the end of the inner support steel pipe (1).

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