Cast-in-place pile reinforcement cage for superfluid concrete drilling
By designing four-row positioning tooling on the cast-injected pile steel cage, the concentric origin is determined by using the fitting of concrete rollers to the inner wall of the pile hole and the adjustment bolts, the problems of difficulty in positioning the steel cage in the pile hole and poor uniformity of the protective layer are solved, and the accurate lowering of the steel cage and high-quality protective layer are achieved.
Patent Information
- Application Number
- CN202421536417.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In strata with high groundwater levels and soft soil layers, it is difficult to position the steel cages in the concrete inserted into the poured, resulting in poor verticality and poor uniformity of the protective layer, and poses quality and safety hazards.
A cast-injected pile reinforced cage for superfluid concrete drilling is designed, and a four-row positioning tooling is adopted, including steel bar brackets, concrete rollers and adjustment mechanisms. The concentric origin of the steel bar cage and the inner wall of the pile hole is determined by the attachment of the concrete rollers to the inner wall of the pile hole and the adjustment bolts to ensure that the lowering positioning of the steel bar cage is accurate and vertical.
It effectively solves the problem of the steel cage maintaining a vertical state in the pile hole and uniformity of the protective layer thickness in the pile hole, improves the construction quality and safety, and avoids the problem of the protective layer being easily corroded.
Smart Images
Figure CN222835227U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pile foundation steel cages, in particular to a cast-in-place pile steel cage used for superfluid concrete drilling. Background Art
[0002] Usually, dry drilling and mud wall drilling can visually observe the pile hole and more accurately measure the uniformity and verticality of the protective layer of the steel cage. For strata with high groundwater levels and soft soil layers, it is necessary to use the construction technology of bored pile drilling and then inserting the steel cage, but this technology is very difficult for the steel cage to be positioned in the poured concrete. The current traditional solution is to set a support frame or protective layer pad for the steel cage. The construction method of setting a protective layer pad for the steel cage is difficult to ensure the verticality of the steel cage. If a support frame is set on the positioning vertical reinforcement of the steel cage, the inner wall of the pile hole will corrode the support frame and eventually corrode the steel cage. In short, the traditional method of lowering the steel cage will have quality and safety risks. Utility Model Content
[0003] In view of the above problems, the utility model proposes a cast-in-place pile reinforcement cage for superfluid concrete drilling, which is used in the superfluid concrete bored cast-in-place pile post-placement reinforcement cage construction process to ensure that the reinforcement cage remains vertical in the pile hole and improve the uniformity of the thickness of the reinforcement cage protective layer.
[0004] To achieve the above purpose, the following technical scheme is adopted: a cast-in-place pile steel cage for superfluid concrete drilling includes a steel cage body and a plurality of positioning fixtures, wherein four longitudinal rows of positioning fixtures are arranged on the steel cage body, wherein every two longitudinal rows of positioning fixtures are symmetrical with the axis as the center, and each longitudinal row includes a plurality of positioning fixtures,
[0005] The positioning tooling includes a steel bar support, a concrete roller and two sets of adjustment mechanisms.
[0006] The steel bar bracket is a concave bracket formed by bending the two ends of the steel bar, including a roller support part at the transverse part and a bolt welding part at the bending part.
[0007] The concrete roller is a roller with the middle section as the center and the section radius gradually decreasing toward both ends. The concrete roller is assembled on the roller support part of the steel bar bracket to ensure that the concrete roller rotates with the roller support part as the axis.
[0008] The adjustment mechanism includes high-strength bolts and high-strength nuts. The high-strength bolts are assembled in the high-strength nuts. The ends of the bolt rods of each group of high-strength bolts are respectively welded to the ends of the corresponding bolt welding parts. Each group of high-strength nuts are respectively welded to the positioning vertical bars of two parallel steel cage bodies to ensure that the concrete rollers of the positioning tooling can be horizontally close to the inner wall of the pile hole.
[0009] Furthermore, the bolt welding portion and the roller supporting portion form an angle of 90°.
[0010] Furthermore, the distances from the center of the concrete roller to the two roller support parts are equal.
[0011] Furthermore, the high-strength bolt is a full-thread bolt.
[0012] Furthermore, the welding of the high-strength bolts and the ends of the bolt welding parts and the welding of the high-strength nuts and the positioning vertical bars of the steel cage body are both performed by projection welding.
[0013] Furthermore, two limit retaining rings are welded on the roller support portion, and the two limit retaining rings are respectively located at two end surfaces of the concrete roller.
[0014] Beneficial effects of the utility model: the utility model arranges four rows of several positioning tools on the vertical reinforcement of the steel cage positioning bar, takes the contact surface between the concrete roller and the inner wall of the pile hole as the reference point, determines the concentric origin of the steel cage and the inner wall of the pile hole by adjusting the bolts, and uses the concrete roller as the lowering guide rolling surface to ensure the positioning accuracy and verticality of the steel cage. At the same time, the concrete roller serves as a protective layer pad to ensure that the inner wall of the pile hole is isolated from the steel bar part, effectively solving the problem of easy corrosion of the protective layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a top view of the utility model;
[0016] Figure 2 It is the front view of the utility model;
[0017] Figure 3 A top view of the positioning tooling;
[0018] Figure 4 It is an application schematic diagram of the utility model.
[0019] As shown in the figure: 1. Steel bar support; 2. Concrete roller; 3. High-strength bolt; 4. High-strength nut; 5. Limiting ring; 100. Roller support part; 101. Bolt welding part; 700. Pile hole; 800. Positioning tooling; 900. Steel bar cage body; 901. Positioning vertical reinforcement. DETAILED DESCRIPTION
[0020] Example 1
[0021] The following is further described with reference to the accompanying drawings: Figure 1-3 To provide a cast-in-place pile reinforcement cage for superfluid concrete drilling, comprising a reinforcement cage body 900 and a plurality of positioning tools 800 arranged thereon,
[0022] Design and assembly of positioning tool 800: Positioning tool 800 includes a steel support 1, a concrete roller 2 and two sets of adjustment mechanisms, wherein:
[0023] The steel bar support 1 is a concave support formed by bending the two ends of the steel bar, wherein the transverse part is used as the roller support part 100, and the bolt welding parts 101 at the two bending parts are at a 90° angle with the roller support part 100.
[0024] The concrete roller 2 is cast in a mold using concrete. The concrete roller 2 is centered at the middle section, and the section radius gradually decreases toward both ends. The axial center is provided with an axial hole for matching with the steel bar bracket 1.
[0025] The adjustment mechanism includes a high-strength bolt 3 and a high-strength nut 4, wherein the high-strength bolt 3 is a full-thread bolt.
[0026] The concrete roller 2 is assembled on the roller support part 100 of the steel bar support 1, ensuring that the concrete roller 2 rotates with the roller support part 100 as the axis, and the distances from the center of the concrete roller 2 to the two roller support parts 100 are equal. After the concrete roller 2 is assembled, two limit retaining rings 5 are welded on the roller support part 100, and the two limit retaining rings 5 are respectively located at the two end faces of the concrete roller 2. The high-strength bolts 3 are assembled in the high-strength nuts 4, and the ends of the bolt rods of the high-strength bolts 3 of each set of adjustment mechanisms are respectively welded to the ends of the two bolt welding parts 101 by projection welding.
[0027] The positioning fixture 800 is assembled on the steel cage body 900. Four vertical rows of positioning fixtures 800 are assembled on the steel cage body 900. Among them, every two vertical rows of positioning fixtures 800 are symmetrical with the axis as the center. Each vertical row includes a plurality of positioning fixtures 800. The number of positioning fixtures 800 in each vertical row is determined according to the depth of the pile hole. The two high-strength nuts 4 of the adjustment mechanism of each positioning fixture 800 are respectively welded to the positioning vertical bars 901 of two parallel steel cage bodies 900 by projection welding, so as to ensure that the concrete roller 4 can be horizontally close to the inner wall of the pile hole 700.
[0028] like Figure 4As shown, before the cast-in-place pile reinforcement cage described in this example is lowered, the high-strength bolts 3 are first manually adjusted according to the actual situation of the pile hole 700, so that the distance from the center of the reinforcement cage body 900 to the contact surface of the concrete roller 2 at the corresponding point is equal to the radius of the pile hole 700, so as to ensure that the reinforcement cage is concentric with the pile hole. Since the post-placement reinforcement cage construction process is adopted, the cast-in-place pile reinforcement cage described in this example is hoisted to the top of the pile hole 700 and lowered, and the reinforcement cage is pressed into the concrete of the pile hole 700 by a third-party device. The reinforcement cage is lowered along the inner wall of the pile hole 700 through the concrete roller 2 on the positioning tool, forcing the reinforcement cage body to not deviate during the entire lowering process. At the same time, the concrete roller 3 separates all the reinforcement parts from the inner wall of the pile hole, effectively solving the problem of easy corrosion of the protective layer.
[0029] The present invention is not limited to the present embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.
Claims
1. A cast-in-place pile reinforcement cage for superfluid concrete drilling, comprising a reinforcement cage body (900) and a plurality of positioning fixtures (800), characterized in that: Four longitudinal rows of positioning tools (800) are arranged on the steel cage body (900), wherein every two longitudinal rows of positioning tools (800) are symmetrical with the axis as the center, and each longitudinal row includes a plurality of positioning tools (800). The positioning tool (800) comprises a steel bar support (1), a concrete roller (2) and two sets of adjustment mechanisms. The steel bar support (1) is a concave support formed by bending both ends of the steel bar, comprising a roller support portion (100) at the transverse portion and a bolt welding portion (101) at the bending portion. The concrete roller (2) is a roller with a middle section as the center and a section radius gradually decreasing toward both ends. The concrete roller (2) is assembled on the roller support part (100) of the steel bar support (1) to ensure that the concrete roller (2) rotates with the roller support part (100) as the axis. The adjustment mechanism comprises high-strength bolts (3) and high-strength nuts (4), the high-strength bolts (3) are assembled in the high-strength nuts (4), the ends of the bolt rods of each group of high-strength bolts (3) are respectively welded to the ends of the corresponding bolt welding parts (101), and each group of high-strength nuts (4) are respectively welded to the positioning vertical bars (901) of two parallel steel cage bodies (900), so as to ensure that the concrete rollers (2) of the positioning tooling (800) can be horizontally close to the inner wall of the pile hole (700).
2. The cast-in-place pile reinforcement cage according to claim 1, characterized in that: The bolt welding portion (101) and the roller supporting portion (100) form an angle of 90°.
3. The cast-in-place pile reinforcement cage according to claim 2, characterized in that: The distances from the center of the concrete roller (2) to the two roller support parts (100) are equal.
4. The cast-in-place pile reinforcement cage according to claim 3, characterized in that: The high-strength bolt (3) is a full-thread bolt.
5. The cast-in-place pile reinforcement cage according to claim 4, characterized in that: The welding of the high-strength bolt (3) and the end of the bolt welding portion (101) and the welding of the high-strength nut (4) and the positioning vertical reinforcement (901) of the steel cage body (900) are both performed by projection welding.
6. The cast-in-place pile reinforcement cage according to claim 5, characterized in that: Two limit retaining rings (5) are welded on the roller support part (100), and the two limit retaining rings (5) are respectively located at two end surfaces of the concrete roller (2).