Accurate positioning device for lowering reinforcement cage

Abstract

The utility model discloses a reinforcement cage lowering accurate positioning device which comprises a frame body and a rolling body, the frame body comprises a horizontal transverse bar and two supporting frames arranged in parallel at an interval, one ends of the two supporting frames are connected with a main bar of a reinforcement cage, and the two ends of the horizontal transverse bar are connected with the other ends of the two supporting frames respectively. The rolling body is rotatably installed on the horizontal transverse bar and abuts against the inner wall of the steel casing. According to the accurate positioning device for lowering the reinforcement cage, in the lowering process of the reinforcement cage, the rolling body can be attached to the inner wall of a steel casing all the time and slide downwards along with the reinforcement cage, and support is formed in the direction perpendicular to the moving direction of the reinforcement cage, so that deviation of the reinforcement cage in the lowering process is avoided, and the pile foundation centering efficiency and the construction quality are guaranteed. Meanwhile, the two sets of supporting frames are arranged in parallel and can stably support the rolling body, and the situation that the rolling body swings left and right, and consequently the reinforcement cage deviates left and right in the lowering process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, and in particular to a precise positioning device for lowering a reinforcement cage. Background Art

[0002] In the field of bridge construction, bored piles have good static bearing capacity, can withstand large loads, have a long service life, are suitable for various soil layers, and have good adaptability. Bored piles have certain seismic resistance in earthquakes and can provide good seismic resistance when an earthquake occurs. Bored pile construction technology is advanced, construction is fast, safe and reliable, and material consumption is low, which can achieve high-quality construction of the project.

[0003] At present, the steel cage of bored piles is usually lowered by setting a steel pole on the top of the casing. The hole positioning needs to restore the center of the pile through the protection pile. The surveyor measures the center of the steel cage to make it coincide with the center of the pile, and then inserts the steel pole into the steel cage lifting ring to lower the steel cage. The existing steel cage lowering device solves the problem of steel cage positioning to a certain extent.

[0004] However, the current method of lowering the pile foundation steel cage cannot accurately position it at one time. In actual use, it consumes manpower and requires a large number of workers. In addition, the accuracy of manual centering is low, the construction is relatively random, and the centering quality of the steel cage is difficult to guarantee, which easily causes the steel cage to deviate, ultimately affecting the centering efficiency and construction quality of the pile foundation, as well as the difficulty of subsequent top cap construction. With the increase in the number of bridge constructions and the continuous improvement of pile requirements, it is urgent to innovate the precise positioning device for lowering the pile foundation steel cage. Utility Model Content

[0005] Based on this, it is necessary to provide a precise positioning device for lowering a steel cage, as the existing method for lowering the steel cage makes it difficult to ensure the centering quality of the steel cage, which easily causes the steel cage to be misaligned.

[0006] A steel cage lowering precision positioning device, comprising a frame body and a rolling body;

[0007] The frame body includes horizontal transverse reinforcement and two support frames arranged in parallel at intervals, one end of the two support frames is connected to the main reinforcement of the steel cage, and the two ends of the horizontal transverse reinforcement are respectively connected to the other ends of the two support frames;

[0008] The rolling body is rotatably mounted on the horizontal cross rib, and the rolling body abuts against the inner wall of the steel casing.

[0009] In one of the embodiments, the frame body further includes short limiting ribs, the short limiting ribs are installed on the horizontal transverse ribs, and the short limiting ribs are provided on both sides of the rolling body.

[0010] In one of the embodiments, the rolling element is made of concrete.

[0011] In one embodiment, the support frame is U-shaped, and the support frame includes a first rod body, a second rod body and an arc rod. The first rod body and the second rod body are connected to the main reinforcement of the steel cage, the two ends of the arc rod are connected to the first rod body and the second rod body, and the horizontal cross reinforcement is connected to the arc rod.

[0012] In one embodiment, the horizontal cross rib is connected to the midpoint of the arc-shaped rod.

[0013] When the above-mentioned precise positioning device for lowering the steel cage is actually used, multiple precise positioning devices for lowering the steel cage are installed at circumferential intervals of the steel cage, and two support frames are connected to the main bars of the steel cage, so that the rolling body abuts against the inner wall of the steel casing. During the lowering process of the steel cage, the rolling body can always stick to the inner wall of the steel casing and slide down with the steel cage, forming support perpendicular to the moving direction of the steel cage, thereby avoiding displacement of the steel cage during the lowering process and ensuring the centering efficiency and construction quality of the pile foundation. At the same time, two groups of support frames are set in parallel to form a stable support for the rolling body, avoiding the rolling body from swinging left and right, resulting in left and right deviation during the lowering process of the steel cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0015] Figure 1 It is a schematic diagram of the structure of a precise positioning device for lowering a steel cage in one embodiment.

[0016] Reference numerals:

[0017] 10-frame, 11-horizontal cross ribs, 12-support frame, 121-first rod body, 122-second rod body, 123-arc rod, 13-limiting short ribs, 14-main ribs, 20-rolling body. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] See also Figure 1 In one embodiment, a plurality of steel cage lowering precise positioning devices are installed at intervals in the circumference of the steel cage to center the steel cage during the lowering process. The plurality of steel cage lowering precise positioning devices can be arranged horizontally at intervals in a circle in the circumference, or can be arranged spirally at intervals in the circumference.

[0022] Specifically, the positioning device includes a frame 10 and a rolling body 20. The frame 10 is installed on the steel cage, and the rolling body 20 is installed on the frame 10. The rolling body 20 abuts against the inner wall of the steel casing so that it rolls along the inner wall of the steel casing during the lowering of the steel cage to achieve the centering positioning of the steel cage.

[0023] In one embodiment, the frame 10 includes a horizontal transverse rib 11 and two support frames 12, the two support frames 12 are arranged in parallel at intervals, one end of the two support frames 12 is connected to the main rib 14 of the steel cage, the two ends of the horizontal transverse rib 11 are respectively connected to the other ends of the two support frames 12, and the rolling body 20 is rotatably mounted on the horizontal transverse rib 11. Among them, two groups of support frames 12 are arranged in parallel, which can form a stable support for the rolling body 20, and prevent the rolling body 20 from swinging left and right, resulting in left and right deviation during the lowering process of the steel cage.

[0024] In one embodiment, one end of the support frame 12 is welded to the main reinforcement 14 of the steel cage, and the horizontal transverse reinforcement 11 is welded to the support frame 12. Of course, in other embodiments, the support frame 12 can also be tied and fixed to the main reinforcement 14 of the steel cage, and the connection between the horizontal transverse reinforcement 11 and the support frame 12 is bolted or the like.

[0025] In one embodiment, the support frame 12 is U-shaped, and includes a first rod 121, a second rod 122, and an arc rod 123. The first rod 121 and the second rod 122 are arranged in parallel with each other, the first rod 121 and the second rod 122 are connected to the main reinforcement 14 of the reinforcement cage, the two ends of the arc rod 123 are connected to the first rod 121 and the second rod 122, and the horizontal cross reinforcement 11 is connected to the arc rod 123.

[0026] Specifically, the horizontal cross rib 11 is connected to the midpoint of the arc rod 123 to ensure that the support frame 12 is evenly stressed and avoid eccentric loading.

[0027] In one embodiment, the support frame 12 is formed by bending a steel bar twice, which can ensure the strength and production efficiency of the support frame 12. It is understandable that in other embodiments, the support frame 12 can also be formed by combining and connecting the first rod body 121, the second rod body 122 and the arc rod 123.

[0028] In one embodiment, the frame 10 also includes a limiting short rib 13, which is installed on the horizontal transverse rib 11. The limiting short rib 13 is provided on both sides of the rolling body 20. The limiting short rib 13 can limit the rolling body 20 to prevent the rolling body 20 from moving left and right, causing displacement during the lowering of the steel cage.

[0029] In one embodiment, the rolling body 20 is made of concrete, and the rolling body 20 is made of the protective layer pad of the steel cage, which can facilitate material collection and reduce costs. It is understandable that in other embodiments, the rolling body 20 can also be made of a harder material that is not easily deformed, such as iron, hard plastic, etc.

[0030] When the above-mentioned precise positioning device for lowering the steel cage is actually used, multiple precise positioning devices for lowering the steel cage are installed at intervals in the circumference of the steel cage, and two support frames 12 are connected to the main bars 14 of the steel cage, so that the rolling body 20 abuts against the inner wall of the steel casing. During the lowering process of the steel cage, the rolling body 20 can always stick to the inner wall of the steel casing and slide down with the steel cage, forming support in a direction perpendicular to the moving direction of the steel cage, thereby avoiding displacement during the lowering process of the steel cage, ensuring the centering efficiency and construction quality of the pile foundation, and being able to locate the plane position of the steel cage, ensuring that the main bars 14 of the steel cage avoid the base steel bars. At the same time, two groups of support frames 12 are arranged in parallel, which can form a stable support for the rolling body 20, avoiding the rolling body 20 from swinging left and right, resulting in left and right deviation during the lowering process of the steel cage.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A precise positioning device for lowering a steel cage, characterized in that: Including frame and rolling element; The frame body includes horizontal transverse reinforcement and two support frames arranged in parallel at intervals, one end of the two support frames is connected to the main reinforcement of the steel cage, and the two ends of the horizontal transverse reinforcement are respectively connected to the other ends of the two support frames; The rolling body is rotatably mounted on the horizontal cross rib, and the rolling body abuts against the inner wall of the steel casing.

2. The steel cage lowering precise positioning device according to claim 1 is characterized in that: The frame body also includes short limiting ribs, which are installed on the horizontal transverse ribs. The short limiting ribs are arranged on both sides of the rolling body.

3. The steel cage lowering precise positioning device according to claim 1 is characterized in that: The rolling element is made of concrete.

4. The steel cage lowering precise positioning device according to claim 1 is characterized in that: The support frame is U-shaped and includes a first rod body, a second rod body and an arc rod. The first rod body and the second rod body are connected to the main reinforcement of the steel cage. The two ends of the arc rod are connected to the first rod body and the second rod body. The horizontal transverse reinforcement is connected to the arc rod.

5. The steel cage lowering precise positioning device according to claim 4 is characterized in that: The horizontal cross rib is connected to the midpoint of the arc-shaped rod.

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