Snap ring lowering device for offshore large-diameter bored pile reinforcement cage

Abstract

The utility model provides a seaborne large-diameter bored pile reinforcement cage lowering snap ring device which comprises a plurality of sets of hanging frames evenly arranged in the circumferential direction of the upper middle portion of a reinforcement cage, each set of hanging frame comprises two adjacent U-shaped snap rings, U-shaped openings of the U-shaped snap rings face downwards, and the center lines of the U-shaped openings are arranged in the radial direction of the reinforcement cage. By the adoption of the structure, the reinforcement cage can be temporarily hung on the lowering platform, the problems that the reinforcement cage of an offshore large-diameter pile is usually large in dead weight and prone to deformation are solved, the reinforcement cage can be hoisted and placed, the shape of the reinforcement cage is not damaged, lowering can be simply and reliably suspended, and it is guaranteed that the construction process is smoothly and reliably conducted.

Description

Technical Field

[0001] This utility model belongs to the field of offshore steel cage lowering technology, and in particular relates to a locking ring device for lowering offshore large-diameter drilled pile steel cages. Background Technology

[0002] In the construction of large-scale offshore bridges, based on stress requirements, the bridge pile foundation typically involves driving in permanent steel casings, lowering the reinforcing cage, and then pouring underwater concrete. During the lowering of the reinforcing cage, it is usually done in sections using a lowering platform. However, in the event of unforeseen circumstances, it is unavoidable to temporarily halt the lowering process. Currently, there is a lack of hanging structures at the ends of the reinforcing cage, so during construction, the sections can only be stacked on floating cranes. However, the reinforcing cages for large-diameter offshore piles are quite heavy, and this stacking method can easily lead to deformation of the cage, causing inconvenience to construction. Utility Model Content

[0003] In view of this, the present invention aims to propose a locking ring device for lowering the steel cage of a large-diameter bored pile at sea, so as to reasonably place the steel cage, effectively prevent its deformation, and ensure the smooth progress of construction.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A device for lowering a steel cage for a large-diameter offshore bored pile includes an array of mounting frames evenly arranged circumferentially in the upper part of the steel cage. Each set of mounting frames includes two adjacent U-shaped clasps with the U-shaped opening facing downwards and the center line of the U-shaped opening arranged radially along the steel cage.

[0006] Furthermore, the U-shaped retaining ring is welded to the reinforcing cage.

[0007] Furthermore, the width of the U-shaped opening of the U-shaped retaining ring is equal to the distance between two adjacent vertical main bars of the reinforcing cage, the U-shaped retaining ring is tightly attached to the two adjacent vertical main bars of the reinforcing cage, and the top of the U-shaped retaining ring is close to the reinforcing bar of the reinforcing cage.

[0008] Furthermore, the reinforcing cage includes an inner reinforcing cage and an outer reinforcing cage. The inner and outer reinforcing cages each include a number of vertical main bars, stirrups, and reinforcing bars evenly arranged in the circumferential direction. The number of vertical main bars are connected and fixed by stirrups and reinforcing bars. The inner and outer reinforcing cages are respectively provided with hanging frames, and the hanging frames of the inner and outer reinforcing cages are arranged correspondingly.

[0009] Compared with existing technologies, the present invention provides a shackle device for lowering the reinforcing cage of a large-diameter offshore bored pile, which has the following advantages:

[0010] By adopting the structure of this utility model, the steel cage can be temporarily hung on the lowering platform, which solves the problem that the steel cage of large-diameter offshore piles is usually heavy and easily deformed. This device can hoist and place the steel cage without damaging its shape, and the lowering can be paused simply and reliably, ensuring the smooth and reliable progress of the construction process. Attached Figure Description

[0011] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0012] Figure 1 This is a plan view of a steel cage lowering clamping device for a large-diameter bored pile at sea, as described in an embodiment of this utility model.

[0013] Figure 2 for Figure 1 Enlarged view of A;

[0014] Figure 3 This is an elevation view of a steel cage lowering clamping device for a large-diameter bored pile at sea, as described in an embodiment of this utility model.

[0015] Figure 4 This is a cross-sectional view of a steel cage lowering clamping device for large-diameter bored piles at sea, as described in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Steel casing; 2. U-shaped retaining ring; 3. Vertical main reinforcement; 4. Stirrups; 5. Reinforcing bars; 6. Reinforcing cage. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-4 As shown, a device for lowering a steel cage for a large-diameter offshore bored pile includes an array of mounting frames evenly arranged in the circumferential direction at the upper part of the steel cage 6. Each set of mounting frames includes two adjacent U-shaped shackles 2, with the U-shaped opening of the U-shaped shackles 2 facing downwards and the center line of the U-shaped opening arranged radially along the steel cage 6.

[0023] In this invention, the U-shaped retaining ring 2 is preferably made of bent round steel, comprising two upright sections and an arc-shaped section connecting the two upright sections to form a U-shaped opening. The width of the U-shaped opening of the U-shaped retaining ring 2, i.e., the distance between its two upright sections, is equal to the distance between two adjacent vertical main reinforcing bars 3 on the reinforcing cage 6. The two upright sections of the U-shaped retaining ring 2 are tightly attached to the two adjacent vertical main reinforcing bars 3 of the reinforcing cage 6 and then welded. The top of the U-shaped retaining ring 2, i.e., the uppermost end of its arc-shaped section, is tightly attached to the reinforcing bar 5 of the reinforcing cage and then welded. At this time, the U-shaped retaining ring 2 is tightly attached to the reinforcing cage 6, and the line connecting its two upright sections is perpendicular to the diameter of the reinforcing cage, i.e., the center line of the U-shaped opening is set radially along the reinforcing cage 6. This connection structure facilitates the use of a hoisting rope to pass through the U-shaped retaining ring 2 to hang the reinforcing cage 6 on the lowering platform, preventing deformation of the reinforcing cage. At the same time, the U-shaped retaining ring 2 will not affect the subsequent concrete pouring.

[0024] In this invention, the reinforcing cage 6 of the large-diameter steel casing 1 is a large-diameter reinforcing cage. To increase its tensile strength, the reinforcing cage 6 is configured as a double-layered cage, including an inner reinforcing cage and an outer reinforcing cage. The inner and outer reinforcing cages each include several vertical main bars 3, stirrups 4, and reinforcing bars 5 evenly arranged in the circumferential direction. The vertical main bars 3 of the inner and outer layers are arranged in pairs, with several groups in each group, and the two vertical main bars 3 in each group are in contact with each other. The vertical main bars 3 of the inner and outer reinforcing cages are directly opposite each other. The several groups of vertical main bars 3 of the inner and outer layers are connected and fixed by corresponding stirrups 4 and reinforcing bars 5. Due to the large weight of the reinforcing cage 6, in order to improve the stability of the reinforcing cage during placement, hanging frames are set in the inner and outer reinforcing cages respectively. Two U-shaped clamps 2 of the hanging frames are set between two adjacent groups of vertical main bars, and the two in contact vertical main bars 3 are connected to their respective adjacent vertical main bars by the two U-shaped clamps 2. The inner and outer steel cages are arranged with corresponding hanging racks. The steel cages can be hung by passing a rope through the hanging racks of the inner and outer steel cages to ensure that the steel cages are hung stably.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for lowering a reinforcing cage for a large-diameter offshore bored pile, characterized in that: The assembly includes a series of hanging racks evenly arranged in the circumferential direction at the upper part of the steel cage (6). Each set of hanging racks includes two adjacent U-shaped retaining rings (2). The U-shaped opening of the U-shaped retaining rings (2) faces downward and the center line of the U-shaped opening is arranged radially along the steel cage (6).

2. The device for lowering the reinforcing cage of a large-diameter offshore bored pile according to claim 1, characterized in that: The U-shaped retaining ring (2) and the reinforcing cage (6) are welded together.

3. The device for lowering the reinforcing cage of a large-diameter offshore bored pile according to claim 2, characterized in that: The width of the U-shaped opening of the U-shaped clasp (2) is equal to the distance between the two adjacent vertical main bars (3) of the steel cage (6). The U-shaped clasp (2) is close to the two adjacent vertical main bars (3) of the steel cage (6), and the top of the U-shaped clasp (2) is close to the reinforcing bar (5) of the steel cage.

4. The device for lowering the reinforcing cage of a large-diameter offshore bored pile according to claim 1, characterized in that: The steel cage (6) includes an inner steel cage and an outer steel cage. The inner steel cage and the outer steel cage each include a number of vertical main bars (3), stirrups (4) and reinforcing bars (5) evenly arranged in the circumferential direction. The number of vertical main bars (3) are connected and fixed by stirrups (4) and reinforcing bars (5). The inner steel cage and the outer steel cage are respectively provided with hanging frames, and the hanging frames of the inner steel cage and the outer steel cage are arranged correspondingly.

Images