Pile foundation reinforcement cage positioning device

Abstract

The utility model discloses a pile foundation reinforcement cage positioning device which comprises a frame and a positioning part, the frame is arranged at the top of a pile foundation casing, detachable rolling assemblies are correspondingly arranged in the frame in at least three directions, the rolling assemblies make contact with the outer wall of a reinforcement cage, and a laser assembly used for determining the center position of the frame is arranged on the frame. And the positioning parts are arranged in at least three directions of the outer wall of the upper part of the reinforcement cage. By arranging the rolling assemblies on the frame, the reinforcement cage is lowered in a rolling mode, lowering resistance is reduced, and abrasion to a protection wall of a pile casing is avoided; the center of the frame is accurately determined through the laser arranged on the frame, the center of the frame coincides with the center of the pile casing, and therefore it is guaranteed that a pile hole opening is positioned when the reinforcement cage is lowered; the positioning component is arranged to position the upper portion of the reinforcement cage, the situation that the center deviation exceeds the limit when the reinforcement cage is lowered is prevented, and accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation steel cage positioning, in particular to a pile foundation steel cage positioning device. Background Art

[0002] After the pile foundation steel cage is inspected and accepted, it is transported into the construction site and enters the link of lowering the steel cage. When hoisting multiple sections of steel cages, each section of the steel cage should be numbered in sequence. The upper erection bars of the steel cage inserted into the hole first are used to fix the cage body on the erection bars, and then the upper section of the steel cage is temporarily hoisted by a crane to connect the two sections of the steel cages. And so on, the steel cage is gradually lengthened and placed into the hole according to the number. During the lowering process of each section of the steel cage, protective layer pads should be installed. The spacing of the pads is not more than 2m vertically and not less than 4 places on the horizontal circumference. After being inspected and accepted by the on-site supervisor, it is then sunk into the hole and fixed at the correct elevation position with two suspension bars to ensure that the steel bars do not sink or float. The length of the suspension bars needs to be calculated accurately to ensure that the steel cage is lowered to the designed position. The traditional method usually requires workers to hold a plumb bob to check whether the center line of the pile protection and the center line of the steel cage coincide. The personnel operate on the pedal erected on the hole opening. It is easy to be dangerous if care is not taken. Moreover, the light in the hole is insufficient, and there are large errors in manual operation, and even the situation of pile foundation deviation may occur.

[0003] For example, Chinese Patent with the publication number CN202010023854 proposes a positioning device for a pile foundation steel cage and a construction method for a pile foundation steel cage, which includes a frame and a support component. At least three rolling components are arranged in the frame, and the channel formed by all the roller components is adapted to the outer diameter of the steel cage. At least three of the support components are connected to the outer wall of the lower part of the steel cage, and the support components are used to position the lower end of the steel cage. However, it cannot solve the problems of positioning the center of the pile foundation protection pile by the existing device, easy danger in manual positioning, and inability to construct at night due to environmental influence. Summary of the Utility Model

[0004] Aiming at the deficiencies in the above background art, the utility model proposes a pile foundation steel cage positioning device, which solves the problems that the existing device cannot be used at night due to environmental factors, and has large manual positioning errors and is prone to danger.

[0005] The technical solution of the utility model is realized as follows:

[0006] A positioning device for the steel reinforcement cage of a pile foundation, comprising a frame and positioning components. The frame is arranged on the top of the pile foundation casing. At least three sets of detachable rolling components are correspondingly arranged in the frame, and the rolling components are in contact with the outer wall of the steel reinforcement cage. A laser component for determining the central position of the frame is arranged on the frame. The positioning components are arranged on at least three directions on the outer wall of the upper part of the steel reinforcement cage. By arranging the rolling components on the frame, the steel reinforcement cage can be rolled down, reducing the resistance during lowering and avoiding abrasion to the retaining wall of the casing. By arranging the laser on the frame, the center of the frame can be accurately positioned, making the center of the frame coincide with the center of the casing, thus ensuring the positioning of the steel reinforcement cage at the pile hole orifice during lowering. By arranging the positioning components to position the upper part of the steel reinforcement cage, the central deviation of the steel reinforcement cage during lowering can be prevented from exceeding the limit, improving the accuracy.

[0007] Further, the rolling component includes a rolling element and a mounting frame. The rolling element is rotatably connected to the mounting frame, and the mounting frame is bolted to the inner side of the frame, replacing sliding friction with rolling friction, reducing the resistance during the lowering of the steel reinforcement cage and improving the lowering accuracy at the same time.

[0008] Further, the rolling element is a steel pipe or a roller, reducing the frictional force during the lowering of the steel reinforcement cage and avoiding abrasion to the retaining wall caused by the steel reinforcement cage.

[0009] Further, the frame is a square frame welded by equal-angle steel, using local materials and having a low cost. The laser component is arranged at the corners of the frame through support members, and the support members provide support for the laser, facilitating installation.

[0010] Further, the support member is an angle steel, fixedly connected to the corner of the frame, providing support for the laser and facilitating installation. The laser component includes four lasers. The lasers are arranged on the corresponding angle steels and two relatively arranged lasers are located on the same diagonal line. By using the lasers for positioning, the lowering accuracy is improved and deviation is avoided.

[0011] Further, the laser is bolted or welded to the support member, facilitating replacement.

[0012] Further, the frame is fixed to the top of the casing by welding or by ground anchors, ensuring the stability of the frame installation and improving the accuracy of positioning the steel reinforcement cage.

[0013] Further, the positioning component includes positioning steel bars circumferentially distributed on the outer wall of the steel reinforcement cage. The positioning steel bars are fixedly connected to the longitudinal bars of the steel reinforcement cage and are in contact with the inner wall of the casing, avoiding the central deviation of the steel reinforcement cage during lowering and improving the accuracy.

[0014] Furthermore, a support component is provided at the lower part of the steel reinforcement cage. The support component is distributed along the outer wall of the steel reinforcement cage and contacts the inner wall of the casing. The lower part of the steel reinforcement cage is positioned by the support component, improving the construction safety.

[0015] Furthermore, the support component is an ear bar, with a simple structure, convenient and practical.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The present utility model guides and fixes the steel reinforcement cage through the rolling components detachably arranged on the frame, greatly improving the positioning accuracy of the steel reinforcement cage for bored cast-in-place piles. The operation is simple, and it can be reused and is convenient for installation and disassembly. By setting the laser on the frame to determine the center position of the frame, it is convenient for the steel reinforcement cage to pass through the frame and thus position the center of the casing for construction. And even in the case of poor visibility in the hole at night, it can still well ensure the positioning accuracy of the steel reinforcement cage, reducing the inaccuracy and danger of manual positioning. By setting the positioning component to position the upper part of the steel reinforcement cage, it prevents the center deviation of the steel reinforcement cage from exceeding the limit when it is lowered, improving the accuracy. By setting the support component to position the lower part of the steel reinforcement cage, it can also avoid scratching the retaining wall by the steel reinforcement cage, reducing damage and improving the construction quality. Description of the Drawings

[0018] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is the top view of the frame structure of the present utility model;

[0020] Figure 2 It is the schematic diagram of the upper structure of the steel reinforcement cage during construction;

[0021] Figure 3 It is the schematic diagram of the lower structure of the steel reinforcement cage during construction;

[0022] 1. Frame; 2. Support component; 3. Rolling part; 4. Steel reinforcement cage; 5. Installation rack; 6. Borehole wall; 7. Casing; 8. Positioning steel bar; 9. Laser. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0024] Embodiment 1, as Figure 1 、 2 、shown in Figure 3, in this embodiment, a positioning device for a pile foundation steel reinforcement cage includes a frame 1 and positioning components. The frame 1 is square and consists of four section steel members made of equal-angle steel with dimensions of 100mm×100mm×8mm and connected by fillet welding on three sides; the frame 1 can be fixed to the top of the pile foundation casing 7 through ground anchors or welding. At least three sets of detachable rolling components are correspondingly arranged in the frame 1, and the rolling components are in contact with the outer wall of the steel reinforcement cage 4, enabling the steel reinforcement cage 4 to enter the casing 7 through the rolling components 4 in the frame 1; a laser component for determining the center position of the frame 1 is provided on the frame 1. After determining the center position of the frame 1, it is aligned with the center of the casing 7, enabling the steel reinforcement cage 4 to enter from the center position of the casing 7; the positioning components are arranged on at least three directions on the outer wall of the upper part of the steel reinforcement cage 4, and the upper part of the steel reinforcement cage 4 is positioned through the positioning components, reducing the center deviation when the steel reinforcement cage 4 is lowered.

[0025] On the basis of the above embodiment, as a preferred embodiment, as Figure 1 shown, the rolling component includes a rolling element 3 and a mounting bracket 5. The rolling element 3 is rotatably connected to the mounting bracket 5. The rolling element 3 is a steel pipe or a roller. The mounting bracket 5 is bolted to the inner side of the frame 1. The rolling element 3 is in contact with the outer wall of the steel reinforcement cage 4 to position the steel reinforcement cage 4, and during the lowering process of the steel reinforcement cage 4, it reduces the lowering resistance and wear with the rolling component.

[0026] On the basis of the above embodiment, as a preferred embodiment, the support members are equal-angle steel with dimensions of 63mm×63mm×5mm. The support members are welded at the four corners of the frame 1 and are fillet welded on three sides with the adjacent sides of the frame 1. The weld length is 50mm, and the weld leg size is 7mm; the laser component is arranged at the corners of the frame 1 through the support members. The laser component includes four lasers 9. The lasers 9 are arranged on the corresponding support members, and two relatively arranged lasers 9 are located on the same diagonal line. The center position of the casing 7 is located through the lasers 9, so that the steel reinforcement cage 4 enters from the center of the casing 7.

[0027] Embodiment 2, on the basis of Embodiment 1, is further optimized, as Figure 2As shown in the figure, the positioning component includes positioning steel bars 8 circumferentially distributed on the outer wall of the steel reinforcement cage 4. The positioning steel bars 8 are welded to the longitudinal bars of the steel reinforcement cage 4 and are in contact with the inner wall of the casing 7. The positioning component is arranged at the upper part of the steel reinforcement cage 4 to position the upper part of the steel reinforcement cage 4 and prevent the center deviation of the steel reinforcement cage 4 from exceeding the limit during lowering, reducing the wear of the steel reinforcement cage 4.

[0028] Embodiment 3 is a further optimization based on Embodiment 1. As Figure 3 shown in the figure, a supporting component 2 is provided at the lower part of the steel reinforcement cage 4 to ensure that the supporting component 2 can abut against the hole wall when the steel reinforcement cage 4 is lowered to the bottom of the hole, so as to realize the positioning control of the lower part of the steel reinforcement cage 4; the supporting component 2 includes ear bars welded to the longitudinal bars of the steel reinforcement cage 4. The ear bars are distributed along the outer wall of the steel reinforcement cage 4 and are in contact with the inner wall of the casing 7, avoiding scratching the hole wall by the steel reinforcement cage 4.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning device for the steel cage of a pile foundation, characterized in that: It includes a frame (1) and positioning components. The frame (1) is arranged at the top of the pile foundation casing (7). Removable rolling components are correspondingly arranged in at least three directions inside the frame (1). The rolling components are in contact with the outer wall of the reinforcement cage (4). A laser component for determining the central position of the frame (1) is arranged on the frame (1). The positioning components are arranged in at least three directions on the outer wall of the upper part of the reinforcement cage (4).

2. The pile foundation reinforcement cage positioning device according to claim 1, characterized in that: The rolling component includes a rolling element (3) and a mounting bracket (5). The rolling element (3) is rotatably connected to the mounting bracket (5), and the mounting bracket (5) is bolted to the inner side of the frame (1).

3. The pile foundation reinforcement cage positioning device according to claim 2, characterized in that: The rolling element (3) is a steel pipe or a roller.

4. The pile foundation reinforcement cage positioning device according to any one of claims 1 to 3, characterized in that: The frame (1) is a square frame welded by equal-angle steel. The laser component is arranged at the corners of the frame (1) through support members.

5. The pile foundation steel reinforcement cage positioning device according to claim 4, wherein: The support members are angle steel. The support members are fixedly connected to the four corners of the frame (1). The laser component includes four lasers (9). The lasers (9) are arranged on the corresponding support members, and two relatively arranged lasers (9) are located on the same diagonal line.

6. The pile foundation steel reinforcement cage positioning device according to claim 5, wherein: The lasers (9) are bolted or welded to the support members.

7. The pile foundation reinforcement cage positioning device according to claim 5, characterized in that: The frame (1) is fixed to the top of the casing (7) by welding or by ground anchors.

8. The pile foundation steel cage positioning device according to claim 1, characterized in that: The positioning components include positioning steel bars (8) circumferentially distributed on the outer wall of the reinforcement cage (4). The positioning steel bars (8) are fixedly connected to the longitudinal bars of the reinforcement cage (4) and are in contact with the inner wall of the casing (7).

9. The pile foundation steel cage positioning device according to claim 8, wherein: A support component (2) is arranged at the lower part of the reinforcement cage (4). The support component (2) is distributed along the outer wall of the reinforcement cage (4) and is in contact with the inner wall of the casing (7).

10. The pile foundation steel reinforcement cage positioning device according to claim 9, characterized in that: The support component (2) is an ear bar.

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