Reinforcement cage hanging bar

Abstract

The utility model relates to the technical field of pile foundation engineering construction, in particular to a steel reinforcement cage hanging bar which comprises a hanging bar body, a hanging ring is fixed to the top end of the hanging bar body, and the hanging bar body sequentially comprises an upper-section hanging bar body, a middle-section hanging bar body and a lower-section hanging bar body from top to bottom. Two transverse short steel bars are welded to the bottom of the lower section hanging bar and form a clamping opening, the width of the clamping opening is gradually reduced outwards, the minimum width of the clamping opening is larger than the diameter of a reinforcement cage ring bar, a blade is fixed to the portion, above the clamping opening, of the lower section hanging bar, and a cutting edge is arranged on the upper end face of the blade. The steel reinforcement cage hanging bar is simple in structure, low in manufacturing cost and capable of being repeatedly used, hanging bar waste is effectively reduced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation engineering construction, in particular to a lifting bar for steel reinforcement cage. Background Technique

[0002] In pile foundation engineering, a lifting bar is generally used to lower the steel reinforcement cage. The bottom end of the lifting bar is welded to the steel bars at the top end of the steel reinforcement cage. A lifting ring is arranged at the top end of the lifting bar. The steel reinforcement cage is lowered to a proper position by using the lifting bar. Then, an I-beam is inserted into the lifting rings of the two symmetrically arranged lifting bars. The I-beam is placed horizontally on the steel casing, and then the next pile foundation construction step is carried out. At present, the lifting bar cannot be taken out in this way, resulting in waste of steel bars. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the deficiencies of the background technique and provide a lifting bar for steel reinforcement cage.

[0004] The present invention is realized by the following technical solutions:

[0005] A lifting bar for steel reinforcement cage includes a lifting bar. A lifting ring is fixed at the top end of the lifting bar. The lifting bar sequentially includes an upper section lifting bar, a middle section lifting bar and a lower section lifting bar from top to bottom. External threads are provided on the upper section lifting bar, the middle section lifting bar and the lower section lifting bar. The upper section lifting bar, the middle section lifting bar and the lower section lifting bar are connected together through a sleeve provided with internal threads. Two transverse short steel bars are welded at the bottom of the lower section lifting bar. The length of the short steel bars is less than the steel bar protection layer thickness. The lowermost short steel bar inclines upward. The two short steel bars form a clamping opening. The width of the clamping opening gradually decreases outward. The minimum width of the clamping opening is greater than the diameter of the circular steel bar of the steel reinforcement cage. A blade is fixed on the lower section lifting bar above the clamping opening. A cutting edge is provided on the upper end face of the blade.

[0006] Preferably, the blade is a triangular iron sheet.

[0007] Preferably, the included angle between the lowermost short steel bar and the lower section lifting bar is 70°-85°.

[0008] Preferably, the minimum width of the clamping opening is 1 cm larger than the diameter of the circular steel bar of the steel reinforcement cage.

[0009] The lifting bar for steel reinforcement cage of the present invention has a simple structure, low manufacturing cost, can be reused, effectively reduces the waste of lifting bars and reduces the cost. Brief Description of the Drawings

[0010] Figure 1 It is a structural schematic diagram during the construction of this embodiment;

[0011] Figure 2 It is a structural schematic diagram of this embodiment.

[0012] In the figure, 1 is a circular steel bar, 2 is a vertical steel bar, 3 is a lifting ring, 4 is an upper section lifting bar, 5 is a middle section lifting bar, 6 is a lower section lifting bar, 7 is a sleeve, 8 is a clamping opening, and 9 is a blade. Detailed implementation mode

[0013] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0014] In this embodiment, the lifting bars for lowering the steel reinforcement cage are divided into three major sections, which are the upper lifting bar 4, the middle lifting bar 5 and the lower lifting bar 6 from top to bottom. The top end of the upper lifting bar 4 is fixed with a lifting ring 3. The upper lifting bar 4, the middle lifting bar 5 and the lower lifting bar 6 are all provided with external threads, and the upper lifting bar 4 and the middle lifting bar 5 as well as the middle reinforcing bar and the lower lifting bar 6 are connected together through sleeves 7 provided with internal threads. The length of the entire lifting bar can be adjusted by the lengths of the upper lifting bar 4, the middle lifting bar 5 and the lower lifting bar 6 connected to the sleeve 7 respectively.

[0015] Two horizontal short reinforcing bars are welded to the bottom of the lower lifting bar 6. The lengths of the two short reinforcing bars are both less than the thickness of the steel reinforcement protection layer of the pile foundation. The lowermost short reinforcing bar is slightly inclined upward. Preferably, the included angle between the lowermost short reinforcing bar and the lower lifting bar 6 is between 70° and 85°. The upper short reinforcing bar can also be slightly inclined downward. The two short reinforcing bars form a clamping opening 8, and the clamping opening 8 is used to clamp the hoop 1 of the steel reinforcement cage. The width of the clamping opening 8 gradually decreases outward. The minimum width of the clamping opening 8 is greater than the diameter of the hoop 1 of the steel reinforcement cage. Preferably, the minimum width of the clamping opening 8 is 1 cm larger than the diameter of the hoop 1 of the steel reinforcement cage. A blade 9 is fixed on the lower lifting bar 6 above the clamping opening 8. In this embodiment, the blade 9 is a triangular iron sheet, and a cutting edge is provided on the upper end surface of the blade 9, and a sharp cutting edge is formed on the upper end surface of the blade 9.

[0016] According to the elevation of the hoop 1 at the top of the steel reinforcement cage of the pile foundation and the elevation of the top of the steel protection cylinder, the total length of the lifting bar is calculated. The upper lifting bar 4, the middle lifting bar 5 and the lower lifting bar 6 are threadedly connected into a whole with the sleeve 7, and the total length of the lifting bar is adjusted. Two lifting bars of this embodiment are symmetrically used on both sides of the steel reinforcement cage. The lifting bars are attached to the inner side of the steel reinforcement cage. Then, the hoop 1 at the top of the steel reinforcement cage is clamped into the clamping opening 8, and the lifting bar is tied to the vertical reinforcement 2 of the steel reinforcement cage above the top hoop 1 with a self-locking nylon tie above the blade 9. Then, the lifting bar is slowly lowered into the pile foundation hole together with the steel reinforcement cage. After being lowered to the designed position, an I-beam is passed through the lifting rings 3 of the two lifting bars, and the I-beam is horizontally supported on the steel protection cylinder. Then, according to the normal construction steps of the pile foundation, the conduit is installed, the hole is cleaned, the concrete is poured, etc. After the concrete is poured, the I-beam is pulled out, the lifting bar is rotated to take out the clamping opening 8 from the hoop 1, and then the lifting bar is pulled upward forcefully. The self-locking nylon tie is cut off with the blade 9 on the lower lifting bar 6, so as to separate the lifting bar from the steel reinforcement cage, and then the lifting bar is pulled out of the pile foundation hole.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A lifting bar for a steel reinforcement cage, comprising a lifting bar, with a lifting ring (3) fixed to the top end of the lifting bar, characterized in that: The hanger bar successively includes an upper-section hanger bar (4), a middle-section hanger bar (5) and a lower-section hanger bar (6) from top to bottom. The upper-section hanger bar (4), the middle-section hanger bar (5) and the lower-section hanger bar (6) are all provided with external threads, and the upper-section hanger bar (4), the middle-section hanger bar (5) and the lower-section hanger bar (6) are connected together through a sleeve (7) provided with internal threads; two transverse short steel bars are welded at the bottom of the lower-section hanger bar (6). The length of the short steel bars is less than the steel bar protection layer thickness. The lowermost short steel bar inclines upward. The two short steel bars form a clamping opening (8). The width of the clamping opening (8) gradually narrows outward. The minimum width of the clamping opening (8) is greater than the diameter of the cage circular bar (1). A blade (9) is fixed on the lower-section hanger bar (6) above the clamping opening (8). A cutting edge is provided on the upper end face of the blade (9).

2. The lifting bar of the steel reinforcement cage according to claim 1, characterized in that: The blade (9) is a triangular iron sheet.

3. The lifting bar for steel cage according to claim 1, characterized in that: The included angle between the lowermost short steel bar and the lower-section hanger bar (6) is 70°-85°.

4. The steel cage suspension bar according to claim 1, wherein: The minimum width of the clamping opening is 1 cm larger than the diameter of the cage circular bar.

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