Annular lifting appliance applied to super-large-diameter pile foundation reinforcement cage

Abstract

The utility model discloses an annular lifting appliance applied to a super-large-diameter pile foundation reinforcement cage, which comprises a top plate, a bottom plate, a web plate, an inner support, a bottom plate lifting lug and a web plate lifting lug, and the top plate, the bottom plate and the web plate are welded to form an annular box body structure; four inner supports are uniformly arranged on the inner wall of the web plate; web plate lifting lugs are arranged on the inner walls of the web plates, bottom plate lifting lugs are arranged on the outer walls of the web plates, and six vertically-through lifting bar holes are evenly formed in the top plate and the bottom plate. According to the special annular lifting appliance for lifting the super-large-diameter pile foundation reinforcement cage, common materials on a construction site can be welded to form an integral annular structure, compared with a traditional shoulder pole beam lifting appliance which is formed by splicing a single shoulder pole beam or two shoulder pole beams in a cross mode, the integral strength is higher, and meanwhile the requirement for arrangement of lifting bars of the super-large-diameter pile foundation reinforcement cage can be met. The annular lifting appliance has the advantages of high overall strength, strong functionality, better construction quality, strong practicability, simple structure, easiness in manufacturing and processing and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering pile foundation construction, in particular to an annular hanger applied to a super-large diameter pile foundation steel cage. Background Art

[0002] In recent years, bridge construction has developed rapidly, and the scale of bridges has continuously broken records. Extra-large diameter pile foundations are also used in various large-scale bridge projects. The functionality and strength of traditional small-diameter pile foundation tooling equipment are not up to par with the construction requirements of extra-large diameter pile foundations, and the tooling equipment suitable for extra-large diameter pile foundation construction is constantly being innovated.

[0003] Lowering the pile foundation cage is a critical step in pile foundation construction. Lifting the cage requires a pile foundation cage hoist, serving as an intermediate structure connecting the cage and the crane. The cage hoist ensures the cage remains vertical during lowering, preventing tilting or deformation. The cage is hoisted and lowered in sections, butted together. When the final section is lowered, hoisting bars of the same specifications as the cage's main bars must be installed to vertically position the entire cage, ensuring it is lowered into the desired position. The tops of the hoisting bars are mounted on the hoist and symmetrically distributed along the circumference to ensure verticality and accurate positioning of the cage. Traditional pile foundation cage hoists consist of a single or two cross-beam beams. Because they are not circular, they can only accommodate a maximum of four hoisting bars along the circumference. However, due to the heavy weight of the cage for extra-large diameter piles, six hoisting bars are typically required for lowering. Traditional pile foundation cage hoists, however, do not meet these requirements in terms of strength and functionality. Therefore, the design and application of annular slings suitable for the construction of super-large diameter pile foundation reinforcement cages is imminent. Summary of the Invention

[0004] The purpose of the utility model is to provide a ring-shaped sling for use in super-large diameter pile foundation reinforcement cages. The sling has high overall strength and can meet the requirements of more than 6 suspension bars being evenly and symmetrically distributed along the circumferential direction on the sling, thereby ensuring the verticality and positioning accuracy of the super-large diameter pile foundation reinforcement cage when it is hoisted and lowered.

[0005] The purpose of this utility model is achieved in this way:

[0006] A ring-shaped sling used for super-large diameter pile foundation reinforcement cages is characterized by: comprising a top plate, a bottom plate, a web plate, an inner support, a bottom plate lifting ear and a web plate lifting ear, the top plate and the bottom plate are horizontal ring-shaped steel plates placed parallel to each other and having the same inner and outer diameters, a web plate is provided between the outer edge of the top plate and the outer edge of the bottom plate, and the top plate, the bottom plate and the web plate are welded to form an annular box structure; four inner supports with both ends fixed to the inner wall of the web plate are evenly provided on the inner wall of the vertical ring-shaped web plate; a web plate lifting ear pointing to the center of the circle and with a web plate lifting hole at the front end is provided between two adjacent inner supports on the inner wall of the web plate, a bottom plate lifting ear pointing to the center of the circle and with a bottom plate lifting hole at the front end is provided on the outer wall of the web plate at positions corresponding to the inner and outer positions of the web plate lifting ear, and six lifting reinforcement holes that pass through the top and bottom plates are evenly provided.

[0007] The top plate and bottom plate are both circular steel plates with a thickness of 2 cm and a width of 30 cm.

[0008] The web is a curved steel plate with a width of 40 cm and a thickness of 2 cm, which is made up of two semicircular half webs.

[0009] The inner support is I-25 steel, which is used to improve the overall strength and rigidity of the ring spreader.

[0010] The bottom plate lifting lugs and web plate lifting lugs are both 3.2cm thick steel plates. The bottom plate lifting lugs are used to connect the ring sling and the pile foundation steel cage, and there are 4 of them; the web plate lifting lugs are used as lifting points for the crane to lift the ring sling, and there are 4 of them.

[0011] The diameter of the hanger hole is The lifting bars used to install the pile foundation reinforcement cage are arranged symmetrically along the circumference of the ring sling, thereby ensuring that the entire pile foundation reinforcement cage is always in a vertical state when lowered without tilting or deformation.

[0012] The annular sling of the present invention is an integral annular structure, and its diameter is the same as that of the pile foundation. As a special annular sling for lifting reinforcement cages of super-large diameter pile foundations, the present invention can utilize common materials on the construction site to weld into an integral annular structure. Compared with the traditional single or two cross-assembled shoulder beam slings, the overall strength is higher, and at the same time, it can meet the requirements for setting the lifting bars of super-large diameter pile foundation reinforcement cages.

[0013] The utility model has the following advantages:

[0014] 1. High overall strength. The ring sling is formed into a ring-shaped whole by welding various components. The internal support is welded and installed on the inner wall of the web to enhance the overall stability of the structure and meet the requirements of lifting extra-large diameter steel cages.

[0015] 2. Strong functionality. The ring sling can be used as a sling for lifting the super-large diameter pile foundation reinforcement cage, and can also be used to install the lifting bars. After the pile foundation reinforcement cage is lowered into place, due to the large cross-sectional size of the structure of the utility model, it can also be used as an operating platform for the next step of the pile foundation process, which is highly functional.

[0016] 3. Better construction quality. The ring-shaped hoist has a ring-shaped structure, and the cross-sectional dimensions match those of the extra-large diameter pile foundation reinforcement cage. This allows for more than six lifting bars to be evenly and symmetrically distributed along the circumference. Therefore, when used as a hoist to hoist the pile foundation reinforcement cage, the cage can be guaranteed to bear a balanced force without tilting or deformation, thereby ensuring the verticality and positioning accuracy of the extra-large diameter pile foundation reinforcement cage during hoisting and lowering, and guaranteeing the construction quality of the cage installation.

[0017] 4. Highly practical, the ring hanger has a simple structure and is easy to manufacture and process. It can be modified according to the diameters of pile foundation reinforcement cages and can be used for pile foundation reinforcement cages of different cross-sectional sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the structural design diagram of the utility model

[0019] Figure 2 for Figure 1 Top view of . DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the following embodiments and accompanying drawings.

[0021] A circular hanger for an extra-large diameter pile foundation reinforcement cage comprises a top plate 1, a bottom plate 2, a web plate 3, inner supports 4, a bottom plate lifting lug 5, a web plate lifting lug 6, and a lifting rod hole 7. The top plate 1 and bottom plate 2 are horizontal annular steel plates placed parallel to each other and having the same inner and outer diameters. The web plate 3 is disposed between the outer edges of the top plate 1 and the bottom plate 2. The top plate 1, bottom plate 2, and web plate 3 are welded to form an annular box structure. Four inner supports 4 are evenly disposed on the inner wall of the vertical annular web plate 3, with both ends fixed to the inner wall of the web plate 3. A web plate lifting lug 6 pointing toward the center of the circle and having a web plate lifting hole at the front end is disposed between two adjacent inner supports 4 on the inner wall of the web plate 3. A bottom plate lifting lug 5 pointing toward the center of the circle and having a bottom plate lifting hole at the front end is disposed on the outer wall of the web plate 3, corresponding to the inner and outer positions of the web plate lifting lug 6. Six vertically extending lifting rod holes 7 are evenly disposed on the top plate 1 and bottom plate 2 for inserting and installing lifting rods 8.

[0022] The top plate 1 and the bottom plate 2 are both annular steel plates with a thickness of 2 cm and a width of 30 cm.

[0023] The web 3 is a curved steel plate with a width of 40 cm and a thickness of 2 cm, which is formed by splicing two semicircular steel plates.

[0024] The inner support 4 is made of I-25 steel and is used to improve the overall strength and rigidity of the ring spreader.

[0025] The bottom plate lifting lugs 5 and web plate lifting lugs 6 are both 3.2cm thick steel plates. Four bottom plate lifting lugs 5 connect the ring sling to the pile foundation reinforcement cage. Four web plate lifting lugs 6 serve as lifting points for the ring sling. The straight-line distance between the symmetrical bottom plate lifting lugs 5 matches the diameter of the pile foundation reinforcement cage, ensuring the cage remains vertical during installation.

[0026] The diameter of the hanger hole 7 is The lifting bars used to install the pile foundation reinforcement cage are arranged symmetrically along the circumference of the ring sling, thereby ensuring that the entire pile foundation reinforcement cage is always in a vertical state when lowered without tilting or deformation.

[0027] Working principle:

[0028] The pile foundation cage is installed in sections, typically 6-12 meters in length. Before lowering the cage, wire ropes are used to connect the web lugs 6 on the ring spreader to the crane, and the bottom lugs 5 on the ring spreader to the cage. The crane then lifts the cage section through the ring spreader for installation. Before lowering the final section, a lifting rod 8 is inserted through the lifting rod hole 7 on the ring spreader. A sleeve is installed at the top of the lifting rod, locking it against the ring spreader's top plate 1 to prevent it from moving. The crane lifts the last section of the pile foundation steel cage through the circular sling and connects it with the previous section of the pile foundation steel cage installed in the pile foundation hole to form a whole. Then the crane lowers the pile foundation steel cage. When the top of the pile foundation steel cage is lowered to the working surface of the platform, the end of the lifting bar is welded to the main bar of the last section of the pile foundation steel cage. The steel wire rope connecting the circular sling and the pile foundation steel cage is released, and the lifting bar replaces the steel wire rope to connect the pile foundation steel cage and the circular sling. Finally, the crane continues to lower the pile foundation steel cage to the designed position through the circular sling and the lifting bar, completing the lowering and installation of the entire pile foundation steel cage.

[0029] The above are only preferred feasible implementation cases of the present invention, and do not limit the scope of rights of the present invention. Any equivalent structural changes made using the contents of the present invention specification and drawings are included in the scope of rights of the present invention.

Claims

1. A ring-shaped hanger for use in super-large diameter pile foundation reinforcement cages, characterized by: It includes a top plate, a bottom plate, a web plate, an inner support, a bottom plate lifting ear and a web plate lifting ear. The top plate and the bottom plate are horizontal annular steel plates placed parallel to each other and with the same inner and outer diameters. A web plate is provided between the outer edge of the top plate and the outer edge of the bottom plate. The top plate, the bottom plate and the web plate are welded to form an annular box structure. Four inner supports with both ends fixed on the inner wall of the web plate are evenly provided on the inner wall of the vertical annular web plate. A web plate lifting ear pointing to the center of the circle and with a web plate lifting hole at the front end is provided between two adjacent inner supports on the inner wall of the web plate. A bottom plate lifting ear pointing to the center of the circle and with a bottom plate lifting hole at the front end is provided on the outer wall of the web plate at positions corresponding to the inner and outer positions of the web plate lifting ear. Six vertically through-going lifting reinforcement holes are evenly provided on the top plate and the bottom plate.

2. The annular hanger for use in an extra-large diameter pile foundation reinforcement cage according to claim 1, characterized in that: The top plate and bottom plate are both circular steel plates with a thickness of 2 cm and a width of 30 cm.

3. The annular hanger for use in an extra-large diameter pile foundation reinforcement cage according to claim 1, characterized in that: The web is a curved steel plate with a width of 40 cm and a thickness of 2 cm, which is made up of two semicircular half webs.

4. The annular hanger for use in an extra-large diameter pile foundation reinforcement cage according to claim 1, characterized in that: The bottom plate lifting lugs and the web plate lifting lugs are both 3.2 cm thick steel plates. There are 4 bottom plate lifting lugs and 4 web plate lifting lugs.

5. The annular hanger for use in an extra-large diameter pile foundation reinforcement cage according to claim 1, characterized in that: The diameter of the hanger hole for installing the steel cage hanger is Arranged symmetrically along the circumference of the ring sling.

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