Inflatable recoverable cast-in-place pile reinforcement cage orifice positioning device

Abstract

The utility model provides an inflatable recoverable cast-in-place pile reinforcement cage orifice positioning device which comprises a protective rubber sleeve and an inflatable bag, the protective rubber sleeve is wrapped outside the inflatable bag, the inflatable bag is deepened out of an inflation and exhaust pipe, the tail end of the inflation and exhaust pipe is an inflation nozzle, and an air stop valve and a pressure gauge are sequentially arranged close to the inflation nozzle. Reinforcing ribs are fixed outside the protective rubber sleeve in a binding mode, a control rod extends out of the reinforcing ribs, and the protective rubber sleeve and the inflatable bag are arranged between the drill hole and the reinforcement cage. In the placing process of the cast-in-place concrete pile construction reinforcement cage, the device is adopted, the thickness of the protection layer is increased or decreased through inflation and exhaust of the air bags, the annular protection layer is adopted, it is guaranteed that the reinforcement cage is centered, structural axis stress is guaranteed, and meanwhile the thickness of the concrete protection layer is effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering pile foundation construction technology, specifically relating to an inflatable recyclable cast-in-place pile reinforcement cage orifice positioning device. Background Technology

[0002] Currently, in the construction of cast-in-place concrete piles, the traditional protective block has a small contact area with the borehole wall, and the protective block often intrudes into the borehole wall, especially in areas with soft soil layers. This leads to insufficient thickness of the steel reinforcement protective layer. In order to ensure the thickness of the protective layer of the steel reinforcement cage in cast-in-place piles, this utility model was developed. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this utility model aims to solve the problem of insufficient protective layer of reinforcing bars in cast-in-place piles by adopting an inflatable ring-shaped protective measure for the reinforcing cage. Through inflation and deflation, the structure expands and contracts, forming a ring-shaped protective layer to achieve the purpose of positioning the reinforcing cage; through inflation, the reinforcing cage is fixed in the center, ensuring the thickness of the protective layer. An inflatable, recyclable cast-in-place pile reinforcing cage orifice positioning device is provided.

[0004] Its main technical solution is: an inflatable recyclable cast-in-place pile reinforcement cage orifice positioning device, including a protective rubber sleeve and an air bladder. The protective rubber sleeve is wrapped around the air bladder. An inflation and exhaust pipe extends out of the air bladder. The end of the inflation and exhaust pipe is an inflation nozzle. A stop valve and a pressure gauge are arranged in sequence near the inflation nozzle.

[0005] Furthermore, the protective sleeve is secured with reinforcing ribs by binding, and control rods extend from the reinforcing ribs.

[0006] Furthermore, the protective sleeve and the inflatable bladder are placed between the drill hole and the reinforcing cage.

[0007] Furthermore, the reinforcing ribs and control rods are made of round steel or threaded steel, the control rods have a diameter of 16mm, and the reinforcing ribs have a diameter of not less than 16mm.

[0008] Furthermore, the protective sleeve and the inflatable bladder are located at the position of the first reinforcing ring at the top of the steel cage.

[0009] The beneficial effects of this utility model are as follows:

[0010] This device is used during the placement of the reinforcing cage in the construction of cast-in-place concrete piles. It increases or decreases the thickness of the protective layer by inflating and deflating the airbag. The use of a ring-shaped protective layer ensures that the reinforcing cage is centered, ensures the axial force of the structure, and effectively ensures the thickness of the concrete protective layer.

[0011] The construction materials are common, the construction is convenient and easy to operate; in areas with soft soil layers, the construction method of the protective layer of the cast-in-place pile reinforcement cage is improved to ensure that the reinforcement cage is centered, thus ensuring the durability of the structure. The device can be recycled, which is a green construction method. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the positioning device for the steel cage opening of the cast-in-place pile according to this utility model;

[0014] Figure 2 This is a schematic diagram of the AA cross-sectional structure of this utility model;

[0015] The components include: 1. Inflation nozzle; 2. Air stop valve; 3. Pressure gauge; 4. Control rod; 5. Inflation and exhaust pipes; 6. Reinforcing cage; 7. Reinforcing ribs; 8. Protective rubber sleeve; 9. Inflation bladder; 10. Drill hole. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] The purpose of this device is to solve the problem of insufficient protective layer of cast-in-place pile reinforcement. It adopts an inflatable ring-shaped protection measure for the reinforcement cage. By inflating and expanding, it aims to fix the reinforcement cage in the center and ensure the thickness of the protective layer of the reinforcement cage.

[0019] The specific implementation method is as follows: an inflatable recyclable cast-in-place pile reinforcement cage orifice positioning device, including: a protective rubber sleeve, an air bladder, and supporting devices other than the former two.

[0020] The reinforcing rib 7 can be made of round steel or threaded steel, and its diameter should not be less than 16mm. The diameter of the reinforcing rib 7 should be slightly larger than the outer diameter of the reinforcing cage 6. The protective rubber sleeve 8 is fixed on the reinforcing rib 7.

[0021] The control rod 4 can be made of round steel or threaded steel with a diameter of 16mm. Its length is determined according to the length of the blank section of the drill hole 10, and it is advisable to make it about 10cm above the ground elevation.

[0022] The protective sleeve 8 is made of recycled rubber tires bonded and sewn together. It protects the airbag 9 from damage. In the uninflated state, its inner diameter is basically the same as the outer diameter of the reinforcing rib 7. The reinforcing rib 7 and the protective sleeve 8 are tied together to protect the airbag 9 from damage. The reinforcing rib 7 plays a role in shaping and stabilizing.

[0023] The airbag 9 is made of butyl rubber that can withstand a pressure of not less than 0.20MPa. The inflation and deflation pipes 5 are made of PE pressure pipes, and their length should be 0.50m above the ground elevation. They are securely connected to the pressure gauge 3 and the air stop valve 2 by fixing pipe clamps.

[0024] The air compressor injects gas into the air bladder 9 through the air inlet 1. The air bladder 9 expands, and the protective sleeve 8 expands. After the pressure gauge 3 shows that the set pressure has been reached, the air stop valve 2 is closed. Under the action of the ring pressure, the steel cage 6 is located at the center of the borehole 10.

[0025] When the concrete of the cast-in-place pile is poured to the borehole opening, the air stop valve 2 is opened to release the air. Under the pressure of the surrounding concrete and mud, the gas in the air bladder 9 is released, the volume decreases, and the device is taken out through the control rod 4.

[0026] This inflatable, recyclable cast-in-place pile reinforcement cage borehole positioning device is implemented as follows: After the cast-in-place pile borehole is completed and accepted, the reinforcement cage 6 is placed at the borehole opening, and this device is placed at the position of the first reinforcing ring on the top of the reinforcement cage 6, and lowered together with the reinforcement cage 6 to the design elevation. The construction is carried out in the sequence of inflation, de-gassing, grouting, venting, and device removal according to the aforementioned construction steps.

[0027] The specific operation includes the following steps:

[0028] Step 1: Drill a hole 10.

[0029] Step 2: Install the positioning device on the reinforcing cage 6 according to the requirements of the utility model. Lower the reinforcing cage 6 to the design elevation. Adjust the length of the control rod 4 reasonably according to the length of the open section, so that the control rod 4 protrudes about 10.0cm from the opening. The control rod 4 can be made of 16mm threaded steel bar. Inflate the air bag 9 through the inflation nozzle 1 and the inflation and exhaust pipe 5. The air bag 9 expands. Observe the pressure gauge 3. Stop pressurizing when the air pressure reaches a certain level and close the air stop valve 2.

[0030] Step 3: Proceed with the normal grouting operation for the cast-in-place piles.

[0031] Step 4: After the filling is completed, open the gas stop valve 2 to release the gas in the air bladder 9, and take out the device through the control rod 4.

[0032] This positioning device has the following advantages:

[0033] This device is used during the placement of the reinforcing cage in the construction of cast-in-place concrete piles. It increases or decreases the thickness of the protective layer by inflating and deflating the airbag. The use of a ring-shaped protective layer ensures that the reinforcing cage is centered, ensures the axial force of the structure, and effectively ensures the thickness of the concrete protective layer.

[0034] The construction materials are common, the construction is convenient and easy to operate; in areas with soft soil layers, the construction method of the protective layer of the cast-in-place pile reinforcement cage is improved to ensure that the reinforcement cage is centered, thus ensuring the durability of the structure. The device can be recycled, which is a green construction method.

[0035] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An inflatable recoverable cast-in-place pile reinforcement cage orifice positioning device comprising a protective rubber sleeve (8), an inflatable bladder (9), characterized in that: The protective rubber sleeve (8) is wrapped outside the air bag (9), the air bag (9) is deep outside the air inflation, exhaust pipe (5), the tail end of the air inflation, exhaust pipe (5) is air inflation nozzle (1), close to the air inflation nozzle (1) is provided with air stop valve (2) and pressure gauge (3) in turn.

2. The inflation type recoverable cast-in-place pile reinforcement cage orifice positioning device according to claim 1, characterized in that: The protective rubber sleeve (8) is fixed with reinforcing ribs (7) outside the protective rubber sleeve (8), and the reinforcing ribs (7) extend outside the control rod (4).

3. The inflation type recoverable cast-in-place pile reinforcement cage orifice positioning device according to claim 1, characterized in that: The protective rubber sleeve (8) and the air bag (9) are arranged between the drill hole (10) and the reinforcement cage (6).

4. The inflation type recoverable cast-in-place pile reinforcement cage orifice positioning device according to claim 2, characterized in that: The reinforcing ribs (7) and the control rod (4) are made of round steel or threaded steel, the diameter of the control rod (4) is 16mm, and the diameter of the reinforcing ribs (7) is not less than 16mm.

5. The inflation type recoverable cast-in-place pile reinforcement cage orifice positioning device according to claim 2, characterized in that: The protective rubber sleeve (8) and the air bag (9) are located at the first reinforcing ring position on the top of the reinforcement cage (6).

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