Positioning device for shallow-buried cast-in-situ bored pile foundation reinforcement cage

Abstract

The utility model relates to a positioning device for a shallow-buried cast-in-situ bored pile foundation reinforcement cage, which comprises a positioning rod, wherein the positioning rod is arranged in a steel casing and is arranged along the length direction of the steel casing; the upper end of the positioning rod is detachably matched with the upper end of the steel casing; the positioning block is installed on the positioning rod, the positioning block abuts against the inner wall of the steel casing, the positioning block is assembled to be capable of keeping the distance between the positioning rod and the inner wall of the steel casing, and when the positioning device is used, the positioning rod is hoisted in the steel casing, so that the upper end of the positioning rod is fixed to the upper end of the steel casing; the positioning blocks at the lower ends of the positioning rods abut against the inner wall of the steel casing, when the reinforcement cage is hoisted, the reinforcement cage is hoisted downwards along the area defined by the positioning rods, the thickness of a concrete protection layer formed between the outer surface of the reinforcement cage and the inner wall of the steel casing can be kept through the positioning rods, and deviation of the pile foundation reinforcement cage during installation is avoided; accurate positioning of the reinforcement cage in the steel casing is achieved, and it can be guaranteed that the thickness of a protection layer of the reinforcement cage is consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge pile foundation construction, in particular to a reinforcement cage positioning device for shallow buried bored cast-in-place pile foundations. Background Art

[0002] Bored piles have the advantages of high bearing capacity and reliable construction quality, and are currently widely used in construction and bridge engineering. The positioning quality of the pile foundation steel cage affects the subsequent construction of the lower structure such as piers, and directly restricts the construction progress, cost and quality of the project. Although the bored pile construction technology is very mature, the problem of pile foundation steel cage offset has always existed. Therefore, a bored pile steel cage positioning device that is easy to operate should be provided. Utility Model Content

[0003] The purpose of the utility model is to provide a positioning device for a reinforcement cage of a shallow buried bored pile foundation, which can avoid displacement of the reinforcement cage of the pile foundation during installation, achieve accurate positioning of the reinforcement cage in the steel casing, and ensure a consistent thickness of the reinforcement cage protection layer after the pile foundation concrete is formed.

[0004] The technical solution to the technical problem in the utility model adopts the following technical solution: In a preferred embodiment of the utility model, a reinforcement cage positioning device for shallow buried bored pile foundation comprises:

[0005] A positioning rod is disposed in the steel casing and arranged along the length direction of the steel casing;

[0006] The upper end of the positioning rod and the upper end of the steel casing form a detachable fit;

[0007] A positioning block is mounted on the positioning rod and abuts against the inner wall of the steel casing. The positioning block is assembled to maintain the spacing between the positioning rod and the inner wall of the steel casing.

[0008] The utility model also has the following technical features:

[0009] In one embodiment of the utility model, a plurality of groups of positioning rods are arranged at intervals along the circumferential direction of the inner wall of the steel casing, and the area enclosed by the plurality of groups of positioning rods constitutes the area through which the steel cage passes.

[0010] In an embodiment of the utility model, a clamping plate is provided at the upper end of the positioning rod, and the clamping plate is detachably connected to the upper end of the steel casing.

[0011] In an embodiment of the utility model, the clamping plate is in the shape of a plate as a whole, and a clamping opening is provided on the clamping plate, and the clamping opening forms a clamping fit with the upper end of the steel casing.

[0012] In an embodiment of the present invention, the clamping plate and the upper end of the positioning rod form a clamping fit.

[0013] In one embodiment of the utility model, the positioning rod is tubular as a whole, an opening is provided in the length direction of the tube wall of the positioning rod, one end of the clamping plate extends into the opening and is provided with a sliding column, the sliding column is slidably arranged in the tube cavity of the positioning rod, and the upper end of the positioning rod is closed.

[0014] In an embodiment of the present invention, a lifting hole is provided on the plate surface of the clamping plate.

[0015] In an embodiment of the present invention, the extending direction of the positioning block is consistent with that of the clamping plate, and one end of the positioning block extends into the opening and is provided with a guide column.

[0016] In an embodiment of the utility model, a cover cap is provided at the lower end pipe opening of the positioning rod, and the cover cap and the lower end pipe opening of the positioning rod form a detachable connection.

[0017] Compared with the prior art, the beneficial effects of the utility model are embodied in that when the positioning device is in use, the positioning rod is hoisted in the steel casing, and the upper end of the positioning rod is fixed to the upper end of the steel casing, so that the positioning block at the lower end of the positioning rod abuts against the inner wall of the steel casing, and the positioning block makes the distance between the upper and lower ends of the positioning rod and the steel casing consistent. When the steel cage is hoisted, the steel cage is hoisted downward along the area enclosed by the positioning rods. The positioning rods can be used to maintain the thickness of the concrete protective layer between the outer surface of the steel cage and the inner wall of the steel casing. The positioning device can avoid the displacement of the pile foundation steel cage during installation, realize the precise positioning of the steel cage in the steel casing, and ensure the consistency of the thickness of the steel cage protective layer after the pile foundation concrete is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural view of a reinforcement cage positioning device for shallow-buried bored pile foundations in one embodiment of the utility model;

[0019] Figure 2 It is a top view of a reinforcement cage positioning device for shallow-buried bored pile foundations in one embodiment of the utility model;

[0020] Figure 3 It is a cross-sectional view of a reinforcement cage positioning device for shallow-buried bored pile foundations in one embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a single positioning rod used in a shallow buried bored cast-in-place pile foundation reinforcement cage positioning device in one embodiment of the utility model;

[0022] Figure 5The utility model is a front view of a single positioning rod used for a reinforcement cage positioning device for shallow-buried bored pile foundations in one embodiment. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0025] See also Figure 1 , Figure 3 and Figure 5 In the actual hoisting of the steel cage, due to the offset problem between the steel cage and the steel casing, after pouring the concrete, the thickness of the concrete protective layer formed between the steel cage and the steel casing is inconsistent, which leads to the unqualified concrete bored pile after forming. In this regard, the utility model proposes a steel cage positioning device for shallow buried bored pile foundation, including a positioning rod 10, which is arranged in a steel casing 20 and arranged along the length direction of the steel casing 20; the upper end of the positioning rod 10 and the upper end of the steel casing 20 form a detachable fit; a positioning block 30, which is installed on the positioning rod 10, and the positioning block 30 is abutted against the inner wall of the steel casing 20, and the positioning block 30 is assembled to maintain the spacing between the positioning rod 10 and the inner wall of the steel casing 20.

[0026] In one embodiment, a clamping plate 40 is disposed at the upper end of the positioning rod 10 , and the clamping plate 40 is detachably connected to the upper end of the steel casing 20 .

[0027] In one embodiment, the snap-in plate 40 forms a snap-fit ​​with the upper end of the positioning rod 10 . The snap-in plate 40 is plate-shaped as a whole and is provided with a snap-fit ​​opening 41 . The snap-fit ​​opening 41 forms a snap-fit ​​with the upper end of the steel casing 20 .

[0028] In one embodiment, the positioning rod 10 is hoisted into the steel casing 20 by a hoisting device, and the clamping opening 41 on the clamping plate 40 is clamped on the upper end of the steel casing 20, thereby fixing the positioning rod 10, and the positioning block 30 at the lower end of the positioning rod 10 abuts against the inner wall of the steel casing 20, so that the distance between the positioning rod 10 and the steel casing 20 can be kept constant.

[0029] In one embodiment, a plurality of positioning rods 10 are arranged at intervals along the circumferential direction of the inner wall of the steel casing 20, and the area enclosed by the plurality of positioning rods 10 constitutes the area through which the steel cage passes.

[0030] In some embodiments, see Figure 2 The positioning rods 10 are arranged in three groups along the circumference of the steel casing 20 .

[0031] In some embodiments, the positioning rods 10 are arranged in four groups along the circumference of the steel casing 20 , and the positioning rods 10 are distributed at equal angles along the circumferential direction of the steel casing 20 .

[0032] In some embodiments, the clamping plate 40 is fixed to the positioning rod 10 by welding.

[0033] In one embodiment, see Figure 4 The positioning rod 10 is tubular as a whole, and an opening 11 is provided in the length direction of the tube wall of the positioning rod 10. One end of the clamping plate 40 extends into the opening 11 and is provided with a sliding column 42. The sliding column 42 is slidably set in the tube cavity of the positioning rod 10, and the upper end of the positioning rod 10 is closed.

[0034] In one embodiment, the clamping plate 40 is introduced through the lower end of the positioning rod 10 until it slides to the upper end of the positioning rod 10 , thereby achieving connection between the clamping plate 40 and the positioning rod 10 .

[0035] In one embodiment, see Figure 4 and Figure 5 In order to facilitate the hoisting installation and hoisting disassembly of the entire positioning rod 10, a hoisting hole 43 is provided on the plate surface of the clamping plate 40.

[0036] In some embodiments, the positioning block 30 is fixed to the positioning rod 10 by welding.

[0037] In one embodiment, the positioning block 30 and the clamping plate 40 extend in the same direction, and one end of the positioning block 30 extends into the opening 11 and is provided with a guide column 31 .

[0038] In one embodiment, see Figure 4 and Figure 5In order to facilitate the installation and removal of the positioning block 30 and the locking plate 40 and the positioning rod 10, a cap 12 is provided at the lower end of the positioning rod 10, and the cap 12 and the lower end of the positioning rod 10 form a detachable connection.

[0039] In short, when the positioning device is in use, the positioning rod 10 is hoisted in the steel casing 20, and the upper end of the positioning rod 10 is fixed to the upper end of the steel casing 20, so that the positioning block 30 at the lower end of the positioning rod 10 abuts against the inner wall of the steel casing 20, and the positioning block 30 makes the distance between the upper and lower ends of the positioning rod 10 and the steel casing 20 consistent. When the steel cage is hoisted, the steel cage is hoisted downward along the area enclosed by the positioning rod 10. The positioning rod 10 can be used to maintain the thickness of the concrete protective layer between the outer surface of the steel cage and the inner wall of the steel casing 20. The positioning device can avoid the displacement of the pile foundation steel cage during installation, realize the precise positioning of the steel cage in the steel casing 20, and ensure the consistency of the thickness of the steel cage protective layer after the pile foundation concrete is formed.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positioning device for shallow buried bored pile foundation reinforcement cage, characterized in that: include A positioning rod (10) is disposed in the steel casing (20) and arranged along the length direction of the steel casing (20); The upper end of the positioning rod (10) and the upper end of the steel casing (20) form a detachable fit; A positioning block (30) is mounted on the positioning rod (10), and the positioning block (30) abuts against the inner wall of the steel casing (20). The positioning block (30) is assembled to maintain the distance between the positioning rod (10) and the inner wall of the steel casing (20).

2. A positioning device for shallow buried bored pile foundation reinforcement cage according to claim 1, characterized in that: A plurality of groups of positioning rods (10) are arranged at intervals in the circumferential direction of the inner wall of the steel casing (20), and the area enclosed by the plurality of groups of positioning rods (10) constitutes an area through which the steel cage passes.

3. The positioning device for shallow buried bored pile foundation reinforcement cage according to claim 1, characterized in that: A clamping plate (40) is provided at the upper end of the positioning rod (10), and the clamping plate (40) is detachably connected to the upper end of the steel casing (20).

4. A positioning device for shallow buried bored pile foundation reinforcement cage according to claim 3, characterized in that: The clamping plate (40) is in the shape of a plate as a whole. A clamping opening (41) is provided on the clamping plate (40). The clamping opening (41) forms a clamping fit with the upper end of the steel casing (20).

5. A positioning device for shallow buried bored pile foundation reinforcement cage according to claim 4, characterized in that: The clamping plate (40) and the upper end of the positioning rod (10) form a clamping fit.

6. A positioning device for shallow buried bored pile foundation reinforcement cage according to claim 5, characterized in that: The positioning rod (10) is tubular as a whole, and an opening (11) is provided in the length direction of the tube wall of the positioning rod (10). One end of the clamping plate (40) extends into the opening (11) and is provided with a sliding column (42). The sliding column (42) is slidably arranged in the tube cavity of the positioning rod (10), and the upper end of the positioning rod (10) is closed.

7. The positioning device for shallow buried bored pile foundation reinforcement cage according to claim 5, characterized in that: A lifting hole (43) is provided on the plate surface of the clamping plate (40).

8. The positioning device for shallow buried bored pile foundation reinforcement cage according to claim 5, characterized in that: The positioning block (30) and the clamping plate (40) extend in the same direction, and one end of the positioning block (30) extends into the opening (11) and is provided with a guide column (31).

9. A positioning device for shallow buried bored pile foundation reinforcement cage according to claim 8, characterized in that: The lower end pipe opening of the positioning rod (10) is provided with a cover cap (12), and the cover cap (12) and the lower end pipe opening of the positioning rod (10) are detachably connected.

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