Accurate positioning device for lowering reinforcement cage after hole forming of cast-in-situ bored pile

Abstract

The utility model belongs to the technical field of building construction auxiliary devices, and particularly relates to an accurate positioning device for lowering a reinforcement cage after hole forming of a cast-in-situ bored pile. The positioning piece is arranged in the middle of the supporting frame and is of a cylindrical structure composed of a plurality of positioning arc-shaped plates with the same size; the inner ends of the positioning adjusting pieces are connected with the positioning arc-shaped plates, and the outer ends of the positioning adjusting pieces penetrate through the middle positions of the peripheral side walls of the supporting frame. The supporting frame, the positioning piece, the positioning adjusting piece and other parts are arranged, the level of the lowering reinforcement cage can be accurately adjusted, the reinforcement cage can be accurately lowered in the middle of a hole opening, the thickness of a reinforcement protection layer is further accurately adjusted, and the reinforcement cage deviation caused by too large thickness deviation of a pile body concrete protection layer is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction auxiliary devices, and specifically relates to a precise positioning device for lowering a steel cage after a bored pile is bored. Background Art

[0002] With the in-depth advancement of my country's infrastructure construction, bored piles are widely used in highway bridges, municipal engineering, railways, water transport and housing construction projects, and are the most widely used structural form in foundation engineering. Bored piles refer to piles made by forming pile holes in the foundation map through mechanical drilling, steel pipe squeezing or manual excavation at the construction site, setting steel cages inside and pouring concrete.

[0003] During the installation of the steel cage, due to the disturbance of the construction process and other reasons, the position of the steel cage at the hole mouth is prone to deviation and non-centering, which leads to the inconsistent thickness of the concrete layer around the steel cage in the formed bored pile, affecting the bearing capacity and durability of the bored pile. Therefore, during the installation of the steel cage, it is usually necessary to locate the position of the steel cage at the hole mouth to prevent the steel cage from moving during the subsequent construction process. Traditionally, the positioning of the steel cage at the hole mouth is generally achieved by welding limiting steel bars on the steel cage. The limiting effect of the limiting steel bar in the casing or the borehole can greatly reduce the deviation range of the steel cage at the hole mouth, thereby greatly reducing the deviation of the steel cage at the hole mouth. However, since the limiting steel bar is usually welded to the steel cage by manual welding, the connection angle between the limiting steel bar and the steel cage is prone to deviation, which will cause the limiting steel bar to not abut the inner wall of the casing or the inner wall of the borehole well during the actual construction process, so that the limiting steel bar needs to be corrected many times, which makes the positioning work not simple enough.

[0004] The prior art also discloses a steel cage positioning device, such as CN219793922U, which discloses a pile foundation steel cage positioning frame, including a disc, wherein the disc is provided with front-to-back and left-to-right through grooves, wherein the length direction of the through grooves faces the center of the disc, wherein a vertical plate is slidably inserted in the through grooves along the length direction, wherein a rectangular plate is fixedly connected to the lower end of the vertical plate, wherein a limit plate is fixedly connected to the lower end of the rectangular plate facing the center of the disc, wherein a positioning bolt is rotatably inserted to the upper part of the rectangular plate, and a screw is rotatably inserted to the side of the rectangular plate facing the center of the disc. The pile foundation steel cage positioning frame disclosed in the patent can first determine the central position where the steel cage needs to be installed, and then adjust the position of the truncated cone body by rotating the screw according to the size of the steel cage, so that the steel cage is always between the limit plate or the truncated cone body when placed downward, making the installation and positioning of the steel cage more convenient. It is undeniable that the pile foundation steel cage positioning frame disclosed in the patent can indeed achieve the above-mentioned technical effects, but it still has certain shortcomings: when the ground or the pile foundation hole is uneven, the disc cannot be adjusted horizontally and it is impossible to determine whether the disc is horizontal. When the disc is not in a horizontal state, the lowered steel cage will be offset.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a precise positioning device for lowering a reinforcement cage after a bored pile is bored, so as to solve the problems existing in the reinforcement cage positioning frame of the pile foundation in the background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A precise positioning device for lowering a steel cage after bored piles are bored, comprising:

[0009] The support frames for the level gauge are embedded in the middle of all four sides of the top;

[0010] A positioning member disposed at the middle of the support frame, wherein the positioning member is a cylindrical structure composed of a plurality of positioning arc-shaped plates of the same size;

[0011] The inner end is connected to the positioning arc plate and the outer end passes through the positioning adjustment piece at the middle of the side walls around the support frame.

[0012] Preferably, the support frame is square; and the number of the positioning arc plates is 4.

[0013] Preferably, the positioning adjustment member includes a positioning adjustment rod whose inner end is connected to the positioning arc plate and whose outer end passes through the middle position of the side walls of the support frame, a positioning locking nut which is sleeved on the positioning adjustment rod and located between the positioning arc plate and the support frame bracket and is threadedly matched with the positioning adjustment rod, and an adjustment cap fixed on the outer end of the positioning adjustment rod.

[0014] Preferably, first through holes corresponding to the positioning adjustment rods are provided on the side walls surrounding the support frame.

[0015] Preferably, the precise positioning device for lowering the steel cage after the bored pile is holed also includes a horizontal adjustment member arranged at the top corners around the support frame, and the horizontal adjustment member includes a bolt rod that passes through the support frame at the top corner position of the support frame and extends from its bottom, a pad horizontally fixed to the bottom end of the bolt rod, and a horizontal adjustment nut located below the support frame and threadedly matched with the bolt rod.

[0016] Preferably, second through holes corresponding to the bolt rods are provided at the top corners of the support frame.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model is provided with a support frame, through which the gravity of the steel cage can be diffused to the outer edge of the bored pile hole, reducing the force on the bored pile hole, thereby effectively avoiding the risk of hole collapse and improving construction safety performance.

[0019] (2) The utility model is provided with level adjustment members at the four corners of the support frame, which can adjust the level of the support frame and judge whether it is leveled through the bubbles of the spirit level embedded in the four sides of the support frame, so as to overcome the uneven surface of the site and avoid deviation when lowering the steel cage.

[0020] (3) The utility model is provided with a positioning member and a positioning adjustment member for adjusting the positioning member, which can cooperate with the horizontal adjustment member and the support frame to accurately adjust the level of the lowered steel cage, so that the steel cage can be accurately lowered in the center of the hole, and then the thickness of the steel protection layer can be accurately adjusted to avoid the displacement of the steel cage caused by excessive deviation in the thickness of the pile body concrete protection layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 A top view of

[0023] Figure 3 for Figure 1 The main view of

[0024] Description of main reference numerals:

[0025] 1. Support frame; 11. Level; 12. First through hole; 13. Second through hole;

[0026] 2. Positioning piece; 21. Positioning arc plate;

[0027] 3. Positioning adjustment member; 31. Positioning adjustment rod; 32. Positioning locking nut; 33. Adjustment cap;

[0028] 4. Horizontal adjustment piece; 41. Bolt rod; 42. Pad; 43. Horizontal adjustment nut. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solution of the utility model patent. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example

[0031] See attached Figure 1-3 , a precise positioning device for lowering a steel cage after bored piles are bored, comprising:

[0032] A square support frame 1 with a level 11 embedded in the middle of all four sides of the top;

[0033] A positioning member 2 is arranged at the middle of the support frame 1, and the positioning member 2 is a cylindrical structure composed of four positioning arc plates 21 of the same size;

[0034] The inner end is connected to the positioning arc plate 21 and the outer end passes through the middle position of the side wall around the support frame 1. Specifically, the positioning adjustment member 3 includes a positioning adjustment rod 31 whose inner end is connected to the positioning arc plate 21 and whose outer end passes through the middle position of the side wall around the support frame 1, a positioning locking nut 32 which is sleeved on the positioning adjustment rod 31 and is located between the positioning arc plate 21 and the support frame bracket 1 and is threadedly matched with the positioning adjustment rod 31, and an adjustment cap 33 fixed on the outer end of the positioning adjustment rod 31; it is not difficult to understand that the first through hole 12 corresponding to the positioning adjustment rod 31 is opened on the side wall around the support frame 1;

[0035] The horizontal adjustment member 4 is arranged at the top corners of the support frame 1, and the horizontal adjustment member 4 includes a bolt rod 41 that penetrates the support frame 1 from the top corner position of the support frame 1 and extends from the bottom thereof, a pad 42 horizontally fixed to the bottom end of the bolt rod 41, and a horizontal adjustment nut 43 located below the support frame 1 and threadedly matched with the bolt rod 41; it is not difficult to understand that second through holes 13 corresponding to the bolt rod 41 are opened at the top corners of the support frame 1.

[0036] When in use, the support frame 1 is sleeved on the casing and placed on the surface of the site. By observing the bubbles in the level 11, it is determined whether the support frame 1 is horizontal. If the support frame 1 is not in a horizontal state, the support frame 1 is adjusted horizontally with the help of the horizontal adjustment member 4. When adjusting, the horizontal adjustment nut 43 is rotated downward or upward to adjust the length of the bottom of the bolt rod 41 extending out of the bottom of the support frame 1. At this time, it is necessary to add that after the adjustment is completed, the horizontal adjustment nut 43 abuts against the bottom surface of the support frame 1. Through the above adjustment method, the support frame 1 can be adjusted to a horizontal state.

[0037] The diameter of the positioning member 2 is adjusted according to the diameter of the steel cage to be placed below. When adjusting, push the positioning adjustment rod 31 inward or outward to make the diameter of the positioning member 2 correspond to the diameter of the steel cage to be placed below, and keep the positioning member 2 and the casing in a concentric state, and then rotate the positioning locking nut 32 to make it abut against the inner wall of the support frame 1, thereby completing the centering of the steel cage. It should be supplemented that a very small gap is left between the positioning arc plate 21 and the steel cage to be placed below, which will not hinder the bottom of the steel cage.

[0038] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A precise positioning device for lowering a steel cage after bored piles are formed, characterized in that: include: There are support frames for level gauges embedded in the middle of all four sides of the top; A positioning member disposed at the middle of the support frame, wherein the positioning member is a cylindrical structure composed of a plurality of positioning arc-shaped plates of the same size; The inner end is connected to the positioning arc plate and the outer end passes through the positioning adjustment member at the middle of the side walls around the support frame; Wherein, the positioning adjustment member comprises a positioning adjustment rod whose inner end is connected to the positioning arc plate and whose outer end passes through the middle of the side walls around the support frame, a positioning locking nut sleeved on the positioning adjustment rod and located between the positioning arc plate and the support frame bracket and threadedly matched with the positioning adjustment rod, and an adjustment cap fixed on the outer end of the positioning adjustment rod; The side walls around the support frame are provided with first through holes corresponding to the positioning and adjusting rods.

2. The precise positioning device for lowering a steel cage after bored piles are formed according to claim 1, characterized in that: The support frame is square; the number of the positioning arc plates is 4.

3. The precise positioning device for lowering a steel cage after bored pile drilling according to claim 1 is characterized in that: The precise positioning device for lowering the steel cage after the bored pile is bored also includes a horizontal adjustment member arranged at the top corners around the support frame, and the horizontal adjustment member includes a bolt rod that passes through the support frame at the top corner position of the support frame and extends from its bottom, a pad horizontally fixed to the bottom end of the bolt rod, and a horizontal adjustment nut located below the support frame and threadedly matched with the bolt rod.

4. The precise positioning device for lowering a steel cage after bored pile drilling according to claim 3 is characterized in that: Second through holes corresponding to the bolt rods are provided at the top corners of the supporting frame.

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