Multi-point bearing type large-diameter super-long cast-in-place pile reinforcement cage lifting appliance

Abstract

The utility model relates to a multipoint bearing type large-diameter super-long cast-in-place pile reinforcement cage lifting appliance which comprises a bearing steel ring, the difference value between the diameter of the bearing steel ring and the diameter of a reinforcement cage is 0-0.5 m, and a plurality of stiffening steel plates which are distributed along the center of the bearing steel ring at equal intervals in a surrounding mode are arranged on the inner wall of the bearing steel ring. A plurality of hanging ring holes are formed in the steel ring wall of the bearing steel ring, and the hanging ring holes and the stiffening steel plates are distributed in a staggered mode in the circumferential direction of the bearing steel ring. The lifting ring holes are distributed in the circumferential direction of the steel ring wall of the bearing steel ring at equal intervals, two circles of lifting ring holes are formed in the steel ring wall of the bearing steel ring and distributed in the axial direction of the bearing steel ring, one circle of lifting ring holes are connected with a lifting hook of a crane through a steel wire rope, and the other circle of lifting ring holes are connected with a lifting point of a reinforcement cage through a steel wire rope and a shackle combined butterfly buckle rotating ring. According to the utility model, the problems of quality and safety accidents caused by inelastic deformation of the reinforcement cage or unsoldering of the hoisting points due to few hoisting points and large stress of the hoisting points in the existing hoisting technology are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering construction, and particularly relates to a multi-point bearing type large-diameter and ultra-long cast-in-place pile reinforcement cage hanger. Background Art

[0002] According to Chapter 2 of the Technical Specifications for Highway Bridge and Culvert Construction (JTGT3650-2020), cast-in-place piles with a diameter greater than or equal to 2.5m are called large-diameter cast-in-place piles; cast-in-place piles with a pile length greater than or equal to 90m are called extra-long cast-in-place piles. In general, the total weight of the reinforcement cage of large-diameter extra-long cast-in-place piles generally exceeds 60T. During hoisting, steel wire ropes are placed on the reinforcement bars of the reinforcement cage and then hoisted and installed. The following problems may be encountered during the hoisting process:

[0003] 1) Due to the small number of lifting points, the stress at the drop point position is relatively large. When the last few sections of the steel cage are lowered, the overall weight is large and it is very likely that the lifting points will be unwelded, resulting in safety accidents such as the overturning of the steel cage and the side rollover of the crane, causing casualties and economic losses;

[0004] 2) During the hoisting process, the steel frame is prone to inelastic deformation, which causes the steel cage axis to deviate and cannot be installed smoothly;

[0005] 3) Since one end of the steel wire rope is put on the reinforcing steel bars of the steel cage and the other end is put on the hook of the crane, during the lifting process, the force angle between the multiple steel wire ropes and the steel cage is inclined, which will cause the side wall of the steel cage to be squeezed toward the center and deformed. Due to the long length of the super-long cast-in-place piles, it is difficult to splice adjacent steel cages. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a multi-point load-bearing large-diameter and extra-long cast-in-place pile reinforcement cage hoist to solve the problems of the existing hoisting technology, such as the small number of lifting points and the large stress at the lifting points, which may cause the reinforcement cage to undergo non-elastic deformation or the lifting points to become unwelded, leading to quality and safety accidents.

[0007] The purpose of the utility model is achieved through the following technical scheme. The multi-point load-bearing large-diameter super-long cast-in-place pile steel cage hanger includes a load-bearing steel ring, the difference between the diameter of the load-bearing steel ring and the diameter of the steel cage is 0 to 0.5 meters, the inner wall of the load-bearing steel ring is provided with a plurality of reinforcing steel plates which are equally spaced and distributed around the center of the load-bearing steel ring, a plurality of lifting ring holes are opened on the steel ring wall of the load-bearing steel ring, and the lifting ring holes and the reinforcing steel plates are staggered along the circumference of the load-bearing steel ring; the lifting ring holes are equally spaced along the circumference of the steel ring wall of the load-bearing steel ring, and two circles of lifting ring holes are provided on the steel ring wall of the load-bearing steel ring and distributed axially along the load-bearing steel ring, one circle of the lifting ring holes is connected to the hook of the crane through a wire rope, and the other circle of the lifting ring holes is connected to the lifting point of the steel cage through a wire rope and a butterfly buckle swivel of a shackle combination.

[0008] The beneficial effects of the utility model are as follows: compared with the prior art, by arranging a load-bearing steel ring and a stiffening steel plate, and arranging two circles of several lifting eye holes on the load-bearing steel ring, the force points can be partially dispersed to the sling, so as to solve the problems of the existing lifting technology with few lifting points, large stress at the lifting points, or de-soldering of the lifting points causing quality and safety accidents; by setting the difference between the diameter of the load-bearing steel ring and the diameter of the steel cage, during the lifting process, the force angle of the sling and the steel cage is close to vertical, so that the welding seam of the lifting point is not easy to de-solder, the safety is significantly improved, and the steel cage will not be caused to have inelastic deformation.

[0009] Preferably, the load-bearing steel ring is rolled from a steel strip and is welded at the joints by full penetration; it is easy to process and light in weight, and is welded at the joints by full penetration, so the quality is more stable.

[0010] Preferably, the number of the eyelets is 16, with 8 eyelets in each circle, and the eyelets between the upper and lower circles are distributed correspondingly, and the adjacent eyelets in each circle are distributed at an angle of 45° along the center of the load-bearing steel ring; through the arrangement of the above structure, the number of lifting points of the steel cage is increased from 4 in the traditional process to 8, each lifting point is less stressed, and it is safer and more reliable during the lifting process, and the adjacent eyelets are distributed at an angle of 45°, so the stress on the lifting points is more uniform.

[0011] Preferably, the spacing between the upper and lower circles of the eyelets and the upper and lower ends of the load-bearing steel ring is 5 cm, and the eyelets are bored and chamfered at the corners of the eyelets; this reduces the wear between the eyelets and the wire ropes and increases safety, and the spacing between the eyelets and the upper and lower ends of the load-bearing steel ring provides better stress stability for the eyelets.

[0012] Preferably, 8 stiffening steel plates are provided, one end of each stiffening steel plate is fixed to the inner wall of the load-bearing steel ring by a full-penetration fillet weld, and the other ends of each stiffening steel plate are welded together and fixed; through the arrangement of the above structure, the strength of the sling is improved, and at the same time, through the full-penetration fillet weld, the quality after fixation is more stable.

[0013] Preferably, the stiffening steel plates are distributed at an angle of 45° along the center of the load-bearing steel ring, and the spacing between the stiffening steel plates and the eye holes along the inner wall of the load-bearing steel ring is 5 cm; adjacent stiffening steel plates are distributed at an angle of 45°, so that the force distribution of the entire sling is more uniform, and the spacing between the stiffening steel plates and the eye holes does not affect the insertion of the eye holes and the steel wire rope, and at the same time, the strength at the eye holes is also better.

[0014] Preferably, the height of the stiffening steel plate is equal to the height of the load-bearing steel ring, and the thickness of the stiffening steel plate is equal to the thickness of the load-bearing steel ring; in this way, the stiffening steel plate and the load-bearing steel ring can be made of the same material, which is easy to purchase and process, and the cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the top view of the structure of a multi-point bearing type large-diameter and ultra-long cast-in-place pile reinforcement cage hanger.

[0016] Figure 2 It is a schematic diagram of the actual application structure of the multi-point bearing type large-diameter and ultra-long cast-in-place pile reinforcement cage hanger of the utility model.

[0017] The numbers in the attached drawings are: 1. load-bearing steel ring; 2. stiffening steel plate; 3. steel wire rope; 4. hook; 5. shackle combination butterfly buckle swivel; 6. steel cage; 11. eyelet hole; 12. splicing. DETAILED DESCRIPTION

[0018] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figure 1 , 2As shown, the utility model includes a load-bearing steel ring 1, the difference between the diameter of the load-bearing steel ring 1 and the diameter of the steel cage is 0 to 0.5 meters, and the diameter of the load-bearing steel ring 1 is generally 2.8 meters. The inner wall of the load-bearing steel ring 1 is provided with a plurality of reinforcing steel plates 2 which are equally spaced and distributed around the center of the load-bearing steel ring 1. A plurality of lifting ring holes 11 are opened on the steel ring wall of the load-bearing steel ring 1, and the lifting ring holes 11 and the reinforcing steel plates 2 are staggered along the circumference of the load-bearing steel ring 1; the lifting ring holes 11 are equally spaced and distributed along the circumference of the steel ring wall of the load-bearing steel ring 1, and Two circles of lifting eye holes 11 are arranged on the steel ring wall of the load-bearing steel ring 1 and are distributed axially along the load-bearing steel ring 1. One circle of lifting eye holes 11 is connected to the hook 4 of the crane through a steel wire rope 3, and the other circle of lifting eye holes 11 is connected to the lifting point of the steel cage 6 through a steel wire rope 3 and a shackle combination butterfly buckle swivel 5. In order to meet the lifting needs of various large-diameter cast-in-place pile steel cages, a 25t finished shackle is inserted into the lifting eye 11 connected to the steel cage 6 at the lower layer, and a finished 21.2t butterfly buckle is inserted under the shackle to meet the needs of changing the pile diameter and reduce the stress concentration phenomenon of the lifting eye hole.

[0019] The advantages of this utility are:

[0020] 1. Easy processing and light weight: The slings are made of conventional bulk materials on the market, which are easy to purchase, and the processing technology is mature and convenient. The overall rigidity of the slings is large and the weight is only about 1.3t.

[0021] 2. Good use effect: Through practice, this hoist is easy to install, the steel cage has almost no deformation during the hoisting process, and the use effect is good.

[0022] 3. Safe and reliable: The number of lifting points of the steel cage is increased from 4 in the traditional process to 8. The force on each lifting point is small, the force angle is close to vertical, the welds at the lifting points are not easy to fall off, and the safety is significantly improved.

[0023] The load-bearing steel ring 1 is rolled from a steel strip and is welded at the joint 12 by full penetration. After the weld is welded, a pyrotechnic correction process is used to eliminate the weld stress, and the correction temperature is 700°C.

[0024] There are 16 eye holes 11 , 8 eye holes 11 in each circle, the eye holes 11 between the upper and lower circles are distributed correspondingly, and the adjacent eye holes 11 in each circle are distributed at an angle of 45° along the center of the load-bearing steel ring 1 .

[0025] The distance between the upper and lower ring holes 11 and the upper and lower ends of the load-bearing steel ring 1 is 5 cm, and the ring holes 11 are bored and chamfered at the corners.

[0026] There are 8 stiffening steel plates 2, one end of which is fixed to the inner wall of the load-bearing steel ring 1 by a full penetration fillet weld, and the other ends of the stiffening steel plates 2 are welded together and fixed. After all welds are welded, a pyrotechnic correction process is used to eliminate weld stress, and the correction temperature is 700°C.

[0027] The reinforcing steel plates 2 are distributed at an angle of 45° along the center of the load-bearing steel ring 1, and the spacing between the reinforcing steel plates 2 and the eyelet holes 11 along the inner wall of the load-bearing steel ring 1 is 5 cm.

[0028] The height of the stiffening steel plate 2 is equal to the height of the load-bearing steel ring 1 , and the thickness of the stiffening steel plate 2 is equal to the thickness of the load-bearing steel ring 1 .

[0029] The hoisting method of the utility model is: first, the upper ring eyelet 11 of the load-bearing steel ring 1 is connected to the hook 4 of the crane through the wire rope 3, and the lower ring eyelet 11 is connected to the lifting point of the steel cage 6 through the wire rope 3 and the shackle combination butterfly buckle swivel 5; then, the large crane with the load-bearing steel ring 1 hoists one end of the steel cage 6, and the other end of the steel cage 6 is hoisted by the small crane; finally, the large crane with the load-bearing steel ring 1 lifts the steel cage 6, and the small crane assists and aligns it, and transfers it to the top of the drilled hole.

[0030] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger, comprising a load-bearing steel ring (1), characterized in that: The difference between the diameter of the load-bearing steel ring (1) and the diameter of the steel cage is 0 to 0.5 meters. The inner wall of the load-bearing steel ring (1) is provided with a plurality of reinforcing steel plates (2) which are distributed around the center of the load-bearing steel ring (1) in a surrounding manner with equal spacing. The steel ring wall of the load-bearing steel ring (1) is provided with a plurality of lifting ring holes (11), and the lifting ring holes (11) and the reinforcing steel plates (2) are staggeredly distributed along the circumference of the load-bearing steel ring (1); The lifting eye holes (11) are distributed at equal intervals along the circumference of the steel ring wall of the load-bearing steel ring (1), and two circles of lifting eye holes (11) are provided on the steel ring wall of the load-bearing steel ring (1) and are distributed axially along the load-bearing steel ring (1), one circle of the lifting eye holes (11) is connected to the hook (4) of the crane through a steel wire rope (3), and the other circle of the lifting eye holes (11) is connected to the lifting point of the steel cage (6) through a steel wire rope (3) and a shackle combination butterfly buckle swivel (5).

2. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 1 is characterized in that: The load-bearing steel ring (1) is formed by rolling a steel strip and is welded at the joint (12) by full penetration.

3. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 1 or 2, characterized in that: The lifting eye holes (11) are provided with 16 in number, with 8 in each circle of lifting eye holes (11), the lifting eye holes (11) between the upper and lower circles are distributed correspondingly, and the lifting eye holes (11) adjacent to each circle are distributed at an angle of 45° along the center of the load-bearing steel ring (1).

4. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 3 is characterized in that: The distance between the upper and lower circles of the lifting eye holes (11) and the upper and lower ends of the load-bearing steel ring (1) is 5 cm, and the lifting eye holes (11) are bored and chamfered at the corners of the lifting eye holes (11).

5. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 1 is characterized in that: Eight stiffening steel plates (2) are provided, one end of each stiffening steel plate (2) is fixed to the inner wall of the load-bearing steel ring (1) by means of a full penetration fillet weld, and the other ends of each stiffening steel plate (2) are fixed by welding.

6. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 5 is characterized in that: The stiffening steel plates (2) are distributed at an angle of 45° along the center of the load-bearing steel ring (1), and the spacing between the stiffening steel plates (2) and the eyelet holes (11) along the inner wall of the load-bearing steel ring (1) is 5 cm.

7. The multi-point bearing type large diameter and extra-long cast-in-place pile reinforcement cage hanger according to claim 1 is characterized in that: The height of the stiffening steel plate (2) is equal to the height of the load-bearing steel ring (1), and the thickness of the stiffening steel plate (2) is equal to the thickness of the load-bearing steel ring (1).

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