Reinforcement fixing device for cast-in-place pile
By using steel formwork and limiting devices to fix the main reinforcement bars during the construction of cast-in-place piles, the problems of main reinforcement bar displacement and pile head damage were solved, and accurate control of pile diameter and elevation was achieved, thus improving construction quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 山东金驰建设有限公司
- Filing Date
- 2025-04-27
- Publication Date
- 2026-06-02
AI Technical Summary
In the construction of cast-in-place piles, problems such as misalignment of main reinforcement, insufficient protective layer, non-standard pile diameter, and damage to pile heads make it difficult to guarantee the construction quality.
The system uses steel formwork, limiting rods, limiting rings, main reinforcement sleeves, and limiting clamps to form a ring structure, which fixes the position of the main reinforcement, ensuring that the position of the main reinforcement is accurate after the pile head is broken, and that the protective layer meets the design requirements. The steel formwork also controls the pile diameter and elevation to avoid damage to the pile head.
Ensure accurate placement of main reinforcement bars, that the protective layer meets design requirements, and that the pile diameter and elevation are accurate. Avoid damage to pile heads, save on maintenance costs, and ensure that the surface of the reinforcement bars is clean and free of contamination to improve construction quality.
Smart Images
Figure CN224314191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cast-in-place pile construction technology, and specifically discloses a cast-in-place pile reinforcement fixing device. Background Technology
[0002] Cast-in-place piles are a type of pile foundation structure formed by creating pile holes in the ground through mechanical drilling, pipe driving, or manual excavation, followed by placing a steel cage and pouring concrete. They are widely used in building construction, road and bridge engineering, municipal engineering, and other fields, especially in the foundations of high-rise buildings, industrial plants, and other buildings that need to withstand large vertical loads.
[0003] In existing technologies for cast-in-place pile construction, after the reinforcing cage is lowered, no effective positioning control measures are taken for the main reinforcement bars. This leads to the main reinforcement bars shifting after concrete pouring, resulting in excessively large or small spacing between the main reinforcement bars and insufficient protective layer. Furthermore, no effective measures are taken to control the pile top diameter. During the drilling process, hole collapse or pile head removal can easily cause damage, resulting in non-standard cross-sectional dimensions of the exposed portion of the pile body extending into the pile cap or raft slab, which does not meet design requirements. In addition, the main reinforcement bars are not treated. When the pile head is removed later, the main reinforcement bars are covered with concrete slurry and concrete blocks, and there are even problems such as bending and breakage of the pile head reinforcement bars, making the later processing complicated and cumbersome. Utility Model Content
[0004] To address the shortcomings of the existing technology, this utility model provides a reinforcement fixing device for cast-in-place piles, which ensures that the main reinforcement is accurately positioned and the protective layer meets design requirements after the pile head is broken; ensures the accuracy of the pile diameter and pile top elevation after earthwork excavation and pile head breaking, avoiding damage to the pile head; and ensures that the reinforcement is straight and the surface is clean and uncontaminated after the pile head concrete is removed, thus guaranteeing the construction quality of the reinforcement.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] The aforementioned reinforcement fixing device for cast-in-place piles includes a steel formwork. The steel formwork is in the shape of a ring. Several sets of limiting rods are welded to the top of the steel formwork along the circumference. The limiting rods extend radially toward the inside of the steel formwork. Limiting rings are welded to the ends of the limiting rods away from the steel formwork. Main reinforcement sleeves are provided on the limiting rods. Two limiting clamps are snapped onto the upper part of the main reinforcement sleeves.
[0007] Furthermore, the feature is that several sets of limiting links are evenly and spaced apart.
[0008] Furthermore, each set of limiting links includes two links, which are parallel and spaced apart, and the distance between the two limiting links is adapted to the diameter of the main reinforcement.
[0009] Furthermore, the main reinforcement sleeve is fitted between the two limiting links, and the inner diameter of the main reinforcement sleeve is larger than the diameter of the main reinforcement.
[0010] Furthermore, the limiting clamp has a semi-circular structure as a whole.
[0011] Furthermore, the two limiting clamps are spaced apart in the vertical direction.
[0012] Furthermore, several clamps are welded to the opposite sides of the two limiting clamps along with several main reinforcing bar sleeves.
[0013] Furthermore, two of the clamps are respectively installed at both ends of the limiting clamp.
[0014] Furthermore, the two clamps located at the same end of the two limiting clamps are attached to the same main reinforcement sleeve, and the two clamps located at the other end of the two limiting clamps are attached to another main reinforcement sleeve.
[0015] Furthermore, the clamp has an overall U-shaped structure, and the opening of the clamp is located at the end away from the limiting clamp.
[0016] The beneficial effects of this utility model are:
[0017] This invention, by setting a limiting ring and a limiting connecting rod, can limit the position of the main reinforcement bars, preventing displacement and ensuring the accuracy of the main reinforcement bar position after pile head removal, thereby ensuring that the protective layer meets design requirements. By setting a steel formwork, the top elevation of the steel formwork is the pile top elevation after pile head removal, ensuring the accuracy of the pile diameter and pile top elevation after earthwork excavation and pile head removal, avoiding pile head damage, saving pile head repair and replacement costs, and facilitating pile head waterproofing construction. By setting main reinforcement sleeves and limiting clamps, the main reinforcement sleeves are installed on the main reinforcement bars before the reinforcement cage is installed and their ends are sealed. At the same time, the limiting clamps connect all the reinforcement bars into a whole. After the pile head concrete is removed, earthwork is excavated, the limiting clamps are removed, and the main reinforcement sleeves are pulled out for reuse. The main reinforcement bars are straight and the surface is clean and uncontaminated, ensuring the construction quality of the reinforcement. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A;
[0020] Figure 3 This is a schematic diagram of the limiting clamp and clamp of this utility model.
[0021] In the diagram: 1. Steel formwork; 2. Limiting ring; 3. Limiting connecting rod; 4. Main reinforcement sleeve; 5. Limiting clamp; 6. Clamp. Detailed Implementation
[0022] The present invention will now be described and explained in detail with reference to the accompanying drawings.
[0023] Example 1
[0024] like Figure 1-3 As shown, the cast-in-place pile reinforcement fixing device includes a steel template 1. The steel template 1 is generally in the shape of a ring. Several sets of limiting rods 3 are welded to the top of the steel template 1 along the circumference. The limiting rods 3 extend radially towards the inside of the steel template 1. A limiting ring 2 is welded to the end of the several sets of limiting rods 3 away from the steel template 1. A main reinforcement sleeve 4 is provided on each of the several sets of limiting rods 3. Two limiting clamps 5 are clamped to the upper part of the several sets of main reinforcement sleeves 4.
[0025] By setting the limiting ring 2 and the limiting connecting rod 3, the position of the main reinforcement can be limited to prevent displacement, ensuring the accuracy of the main reinforcement position after the pile head is broken, thus ensuring that the protective layer meets the design requirements. By setting the steel formwork 1, the top elevation of the steel formwork 1 is the pile top elevation after the pile head is broken, ensuring the accuracy of the pile diameter and pile top elevation after earthwork excavation and pile head breaking, avoiding pile head damage, saving the cost of pile head repair and replacement, and facilitating the construction of pile head waterproofing. By setting the main reinforcement sleeve 4 and the limiting clamp 5, the main reinforcement sleeve 4 is installed on the main reinforcement before the reinforcement cage is installed and its two ends are sealed. At the same time, the limiting clamp 5 connects all the reinforcement into a whole. After the pile head concrete is removed, earthwork is excavated, the limiting clamp 5 is removed, and the main reinforcement sleeve 4 is pulled out for reuse. The main reinforcement is straight and the surface is clean and uncontaminated, ensuring the construction quality of the reinforcement.
[0026] Several sets of limit linkages 3 are evenly spaced.
[0027] Each set of limiting links 3 includes two links, which are parallel and spaced apart, and the spacing between the two limiting links 3 is adapted to the diameter of the main reinforcement. This allows the main reinforcement to pass through the narrow space enclosed by the steel formwork 1, the limiting ring 2, and the two limiting links 3, preventing displacement of the main reinforcement.
[0028] The main reinforcement sleeve 4 is fitted between the two limiting connecting rods 3, and the inner diameter of the main reinforcement sleeve 4 is larger than the diameter of the main reinforcement. This facilitates the fitting of the main reinforcement sleeve 4 onto the outer surface of the main reinforcement.
[0029] The limiting clamp 5 has a semi-circular structure.
[0030] Two limiting clamps 5 are spaced apart in the vertical direction.
[0031] Several clamps 6 are welded to the opposite sides of the two limiting clamps 5 and several main reinforcement sleeves 4.
[0032] Two clamps 6 are respectively installed at both ends of the limiting clamp 5.
[0033] Two clamps 6 located at the same end of the two limiting clamps 5 are clamped onto the same main reinforcement sleeve 4, and two clamps 6 located at the other end of the two limiting clamps 5 are clamped onto another main reinforcement sleeve 4.
[0034] The clamp 6 has a U-shaped structure, and the opening of the clamp 6 is located at the end away from the limiting clamp 5.
[0035] With the above setup, several clamps 6 are attached to the outer surface of several main reinforcement sleeves 4, and two clamps 6 at the same end of two limiting clamps 5 are attached to the same main reinforcement sleeve 4, while two clamps 6 at the other end of two limiting clamps 5 are attached to another main reinforcement sleeve 4. This allows the main reinforcement to be connected into a single unit. After the pile head concrete is removed, earthwork excavation is carried out, the limiting clamps 5 are removed, and the main reinforcement sleeve 4 is pulled out for reuse. The main reinforcement is straight and the surface is clean and free of contamination, ensuring the construction quality of the reinforcement.
[0036] Working principle and process:
[0037] A steel formwork 1 is fabricated according to the pile diameter. Several sets of limiting rods 3 are welded onto the steel formwork 1 according to the spacing and position of the main reinforcement bars. Then, limiting rings 2 are welded to the ends of the limiting rods 3 furthest from the steel formwork 1. During the installation of the pile reinforcement cage, the steel formwork 1 is welded to the cage, and the top elevation of the steel formwork 1 is controlled to be the pile top elevation after the pile head is removed. The main reinforcement bars of the pile then pass through the narrow space enclosed by the steel formwork 1, the limiting rings 2, and the two limiting rods 3 to prevent the main reinforcement bars from collapsing. Displacement, and then according to the position of the main reinforcement, several clamps 6 are welded to the opposite sides of the two limiting clamps 5. Then, several main reinforcement sleeves 4 are sleeved on the outer surface of several main reinforcements, and several clamps 6 are clamped on the outer surface of several main reinforcement sleeves 4. Among them, two clamps 6 located at the same end of the two limiting clamps 5 are clamped on the same main reinforcement sleeve 4, and two clamps 6 located at the other end of the two limiting clamps 5 are clamped on the corresponding other main reinforcement sleeve 4, connecting the main reinforcements of the cast-in-place pile into a whole, and finally concrete is poured.
Claims
1. A reinforcement fixing device for cast-in-place piles, comprising a steel formwork (1), characterized in that, The steel formwork (1) has a circular structure. Several sets of limiting rods (3) are welded to the top of the steel formwork (1) along the circumference. The limiting rods (3) extend radially to the inside of the steel formwork (1). A limiting ring (2) is welded to the end of the several sets of limiting rods (3) away from the steel formwork (1). Main reinforcement sleeves (4) are provided on the several sets of limiting rods (3). Two limiting clamps (5) are clamped to the upper part of the several main reinforcement sleeves (4).
2. The reinforcement fixing device for cast-in-place piles according to claim 1, characterized in that, Several sets of limiting links (3) are evenly and spaced apart.
3. The reinforcement fixing device for cast-in-place piles according to claim 2, characterized in that, Each set of limiting links (3) includes two, the two limiting links (3) are parallel and spaced apart, and the spacing between the two limiting links (3) is adapted to the diameter of the main reinforcement.
4. The reinforcement fixing device for cast-in-place piles according to claim 3, characterized in that, The main reinforcement sleeve (4) is set between the two limiting connecting rods (3), and the inner diameter of the main reinforcement sleeve (4) is greater than the diameter of the main reinforcement.
5. The reinforcement fixing device for cast-in-place piles according to claim 1, characterized in that, The limiting clamp (5) has a semi-circular structure.
6. The reinforcement fixing device for cast-in-place piles according to claim 5, characterized in that, Two limiting clamps (5) are spaced apart in the vertical direction.
7. The reinforcement fixing device for cast-in-place piles according to claim 6, characterized in that, Several main reinforcement sleeves (4) are welded to the opposite sides of the two limiting clamps (5) with several clamps (6).
8. The reinforcement fixing device for cast-in-place piles according to claim 7, characterized in that, Two clamps (6) are respectively set at both ends of the limiting clamp (5).
9. The reinforcement fixing device for cast-in-place piles according to claim 8, characterized in that, Two clamps (6) located at the same end of the two limiting clamps (5) are clamped onto the same main reinforcement sleeve (4), and two clamps (6) located at the other end of the two limiting clamps (5) are clamped onto another main reinforcement sleeve (4).
10. The reinforcement fixing device for cast-in-place piles according to claim 7, characterized in that, The clamp (6) has a U-shaped structure, and the opening of the clamp (6) is located at the end away from the limiting clamp (5).