Pile casing assembly for preventing deviation of pile foundation reinforcement cage

Abstract

A pile casing assembly for preventing a pile foundation reinforcement cage from deviating comprises an outer cylinder fixedly arranged at the top in a foundation pit, the inner wall of the outer cylinder is fixedly connected with an inner cylinder, the outer diameter of the inner cylinder is equal to the inner diameter of the outer cylinder, and at least three limiting blocks are fixedly arranged on the inner wall of the inner cylinder in a circumferential array distribution mode. When the reinforcement cage makes contact with two of the limiting blocks at the same time, the deviation angle of the reinforcement cage is smaller than the allowable error angle. When the axis of the reinforcement cage deviates or inclines after the reinforcement cage is hoisted into the foundation pit, the outer wall of the reinforcement cage can make contact with the limiting blocks, so that the reinforcement cage cannot deviate by a larger distance from the axis of the foundation pit and incline by a larger angle, and the distance between the limiting blocks and the axis of the foundation pit and the circumferential angle between the adjacent limiting blocks are controlled. The axis deviation value and the inclination angle value of the reinforcement cage can be within the error range; the reinforcement cage can be directly poured after being hoisted into the foundation pit, and real-time correction is not needed, so that the construction of the pile foundation becomes simpler.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation construction, and in particular to a casing assembly for preventing a pile foundation reinforcement cage from being displaced. Background Art

[0002] In the construction industry, whether it is bridge construction or house construction, pile foundation construction must be carried out first. The quality of the pile foundation is related to the quality of the entire building. Therefore, ensuring the quality of the pile foundation is a top priority in the construction industry.

[0003] In the prior art, the process of building a pile foundation is usually to first excavate a foundation pit, then install a casing on the top of the foundation pit, then hoist the pre-made steel cage into the foundation pit through a hoisting device, then gradually pour concrete, and gradually remove the casing during the concrete pouring process until the foundation pit is filled with concrete, and the pile foundation can be formed after the concrete solidifies. In this process, the position of the steel cage in the foundation pit is related to the quality of the entire pile foundation, but in the process of hoisting and lowering, because the inner diameter of the foundation pit and the casing is larger than the outer diameter of the steel cage, after the steel cage falls, its axis may deviate too far from the axis of the foundation pit and exceed the error range. At the same time, due to the uneven bottom of the foundation pit or the impact of the steel cage during the pouring of concrete, the steel cage tilts beyond the error range, which makes the construction of the entire pile foundation unqualified and brings hidden dangers to the subsequent construction work. In order to make the deviation of the steel cage within the error range, it is usually necessary for construction personnel to observe the state of the steel cage in time and adjust and correct it in time, which makes the construction of the entire pile foundation more complicated and prolongs the construction period.

[0004] Therefore, the inventor needs to design a new casing assembly for preventing the pile foundation reinforcement cage from deviating to overcome the above problems. Summary of the invention

[0005] The main purpose of the present application is to provide a casing assembly for preventing the displacement of the reinforcement cage of the pile foundation, so as to solve the problems in the related art of excessive displacement of the reinforcement cage and complicated construction process during pile foundation construction.

[0006] In order to achieve the above-mentioned purpose, the present application provides a casing assembly for preventing the displacement of a pile foundation steel cage, comprising an outer cylinder fixedly arranged on the top of a foundation pit, the inner wall of the outer cylinder being fixedly connected to an inner cylinder, the outer diameter of the inner cylinder being equal to the inner diameter of the outer cylinder, and the inner wall of the inner cylinder being fixedly provided with at least three limit blocks distributed in a circular array, and when the steel cage contacts two of the limit blocks at the same time, its displacement angle is less than the allowable error angle.

[0007] Preferably, the top of the limit block has a chamfered surface.

[0008] Preferably, four limit blocks are provided in total.

[0009] Preferably, an assembly structure is fixedly arranged between the inner cylinder and the outer cylinder.

[0010] Preferably, the assembly structure includes a flange fixedly arranged on the top of the inner cylinder, and the inner cylinder is hung on the top of the outer cylinder through the flange.

[0011] Preferably, a plurality of first lifting ears are fixedly provided on the top of the flange.

[0012] Preferably, a plurality of second lifting ears are fixedly provided on the outer wall of the outer cylinder.

[0013] Preferably, the extending direction of the limiting block is the same as the extending direction of the inner cylinder.

[0014] Preferably, the steel cage includes a plurality of main bars distributed in a circular array and a plurality of annular reinforcing bars distributed linearly, and the annular reinforcing bars are fixedly connected to the outer sides of the main bars.

[0015] The utility model provides a casing assembly for preventing the displacement of a pile foundation reinforcement cage. Compared with the prior art, the utility model has the following beneficial effects:

[0016] When the axis of the steel cage is offset or tilted after being hoisted into the foundation pit, the outer wall of the steel cage will contact the limit block, making it impossible for the axis to be offset by a larger distance or tilted at a larger angle. By controlling the distance between the limit block and the axis of the foundation pit and the circumferential angle between adjacent limit blocks, the axis offset value and the tilt angle value of the steel cage can be within the error range; after the steel cage is hoisted into the foundation pit, it can be poured directly without the need for real-time correction, making the construction of the pile foundation simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0018] Figure 1 It is the overall structure diagram of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 It is an exploded view of the utility model.

[0021] Among them: 1. Outer tube; 2. Inner tube; 3. Limit block; 4. Chamfered surface; 5. Flanged edge; 6. First lifting ear; 7. Second lifting ear; 8. Main reinforcement; 9. Annular reinforcement. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0026] In addition, the term "plurality" shall mean two or more.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Embodiment 1:

[0029] like Figures 1 to 3As shown, a casing assembly for preventing a pile foundation reinforcement cage from being displaced comprises an outer cylinder 1 fixedly arranged at the top of a foundation pit, an inner cylinder 2 fixedly connected to the inner wall of the outer cylinder 1, the outer diameter of the inner cylinder 2 being equal to the inner diameter of the outer cylinder 1, and at least three limit blocks 3 fixedly arranged on the inner wall of the inner cylinder 2 in a circular array, and the displacement angle of the reinforcement cage when contacting two of the limit blocks 3 at the same time is less than the allowable error angle; during operation, after the foundation pit is excavated, the outer cylinder 1 is fixedly arranged at the top of the foundation pit, and the outer cylinder 1 provides a stable environment for the hoisting and concrete pouring of the pile foundation reinforcement cage, so as to prevent it from being affected by the external environment and causing the foundation pit to be displaced. Collapse, after the outer tube 1 is installed and before the steel cage is hoisted, the inner tube 2 is fixedly connected to the inner wall of the outer tube 1. When the axis of the steel cage is offset or tilted after being hoisted into the foundation pit, the outer wall of the steel cage will contact the limit block 3, making it impossible for the axis to be offset by a larger distance and tilted at a larger angle. By controlling the distance between the limit block 3 and the axis of the foundation pit and the circumferential angle between adjacent limit blocks 3, the axis offset value and the tilt angle value of the steel cage can be within the error range. For example, the thickness of the limit block 3 can be increased to reduce the minimum distance between the limit block 3 and the axis of the foundation pit, thereby reducing the offset distance of the steel cage and the tilt angle.

[0030] The top of the limit block 3 has a chamfered surface 4; during operation, when the steel cage is lowered, the main reinforcement 8 may fall on the limit block 3. If the top of the limit block 3 is a plane, the steel cage is blocked and cannot continue to be lowered, and then it is necessary to readjust the position for lowering. The chamfered surface 4 can make the main reinforcement 8 fall on the limit block 3 and still continue to be lowered, reducing the number of readjustment steps and making the lowering smoother.

[0031] There are four limit blocks 3 in total; when working, the limit blocks 3 are arranged on the inner wall of the inner tube 2 by integral molding or welding. The four limit blocks 3 can not only simplify the manufacture of the inner tube 2 and the limit blocks 3, but also fully ensure the deviation accuracy of the steel cage.

[0032] An assembly structure is fixedly arranged between the inner cylinder 2 and the outer cylinder 1; the assembly structure includes a flange 5 fixedly arranged on the top of the inner cylinder 2, and the inner cylinder 2 is hung on the top of the outer cylinder 1 through the flange 5; when working, the inner cylinder 2 is inserted into the outer cylinder 1 and gradually lowered until the flange 5 is hung on the inner wall of the outer cylinder 1 to achieve the installation of the two, and the installation method is simple.

[0033] A plurality of first lifting ears 6 are fixedly provided on the top of the flange 5 ; a plurality of second lifting ears 7 are fixedly provided on the outer wall of the outer tube 1 ; during operation, the inner tube 2 is lifted by the first lifting ears 6 , and the outer tube 1 is moved by the second lifting ears 7 .

[0034] The method for pouring pile foundation in this embodiment is as follows: after the outer tube 1 and the inner tube 2 are installed, the steel cage is directly hoisted into the foundation pit. Due to the limitation of the limiting block 3, concrete can be directly poured into the foundation pit. After the concrete reaches a certain height, the concrete covers a certain height of the bottom of the steel cage, making it difficult for the steel cage to move. At this time, the inner tube 2 is pulled out, and then the concrete pouring continues. When the concrete reaches the bottom of the outer tube 1, the outer tube 1 is pulled out while pouring concrete until the outer tube 1 is completely pulled out and the foundation pit is filled.

[0035] The extension direction of the limit block 3 is the same as that of the inner tube 2. During operation, if the limit block 3 is arranged transversely on the inner wall of the inner tube 2, the steel cage is easily obstructed by the limit block 3 due to deviation when it is suspended, and the contact range between the two is too large, so the steel cage is not easy to fall.

[0036] The steel cage includes a plurality of main bars 8 distributed in a circular array and a plurality of annular reinforcing bars 9 distributed in a linear manner, wherein the annular reinforcing bars 9 are fixedly connected to the outer sides of the main bars 8; during operation, if the steel cage is displaced after being lowered, the outer periphery of the annular reinforcing bars 9 will contact the limit blocks 3.

[0037] Embodiment 2: not shown in the figure, the difference between this embodiment and embodiment 1 is that the stop block 3 is fixedly arranged on the inner wall of the outer tube 1. Compared with embodiment 1, this embodiment reduces an inner tube 2 structure, and directly arranges the stop block 3 on the inner wall of the outer tube 1, but usually, the outer tube 1 is a standard part, and the deviation error of the steel cage required for each pile foundation may be different, and it is costly to construct outer tubes 1 of different specifications for different pile foundations.

[0038] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A casing assembly for preventing the displacement of a pile foundation reinforcement cage, characterized in that: The invention comprises an outer cylinder (1) fixedly arranged at the top of a foundation pit, the inner wall of the outer cylinder (1) being fixedly connected to an inner cylinder (2), the outer diameter of the inner cylinder (2) being equal to the inner diameter of the outer cylinder (1), and the inner wall of the inner cylinder (2) being fixedly arranged with at least three limit blocks (3) distributed in a circular array, and when the steel cage contacts two of the limit blocks (3) at the same time, the offset angle thereof is smaller than the allowable error angle.

2. A casing assembly for preventing displacement of a pile foundation reinforcement cage according to claim 1, characterized in that: The top of the limiting block (3) has a chamfered surface (4).

3. A casing assembly for preventing displacement of a pile foundation reinforcement cage according to claim 1, characterized in that: A total of four limit blocks (3) are provided.

4. A casing assembly for preventing displacement of a pile foundation reinforcement cage according to claim 1, characterized in that: An assembly structure is fixedly arranged between the inner cylinder (2) and the outer cylinder (1).

5. A casing assembly for preventing displacement of a pile foundation reinforcement cage as claimed in claim 4, characterized in that: The assembly structure comprises a flange (5) fixedly arranged on the top of the inner cylinder (2), and the inner cylinder (2) is hung on the top of the outer cylinder (1) through the flange (5).

6. A casing assembly for preventing displacement of a pile foundation reinforcement cage as claimed in claim 5, characterized in that: A plurality of first lifting ears (6) are fixedly arranged on the top of the flange (5).

7. A casing assembly for preventing displacement of a pile foundation reinforcement cage according to claim 1, characterized in that: A plurality of second lifting ears (7) are fixedly arranged on the outer wall of the outer cylinder (1).

8. A casing assembly for preventing displacement of a pile foundation reinforcement cage as claimed in claim 1, characterized in that: The extending direction of the limiting block (3) is the same as the extending direction of the inner cylinder (2).

9. A casing assembly for preventing displacement of a pile foundation reinforcement cage according to claim 1, characterized in that: The steel cage comprises a plurality of main bars (8) distributed in a circumferential array and a plurality of annular reinforcing bars (9) distributed in a linear manner, wherein the annular reinforcing bars (9) are fixedly connected to the outer sides of the main bars (8).

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