A light and safe ladder cage attaching and embedding device applied to a square pier column

Abstract

The utility model discloses a portable safe ladder cage attached embedding device applied to square pier column, it includes embedding climber, high -strength screw rod and ladder cage connecting component, embedding climber is embedded in the pouring process of square pier column, one end of high -strength screw rod is connected with embedding climber thread, and the other end is detachably connected with ladder cage connecting component, the one end of ladder cage connecting component away from high -strength screw rod is fixed with ladder cage stand. The device is not influenced by the cross -sectional size change of square pier column, and the application range is wide, can be installed on the hydraulic climbing form modification platform, reduces the operation safety risk, and can eliminate the hidden danger of corrosion channel caused by traditional embedded steel plate, does not have irreversible damage to the main structure of bridge, and the structure is light, convenient to dismount.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge construction safety facilities, specifically a lightweight and safe ladder cage attachment pre-embedded device applied to square piers. It is mainly used in the construction process of bridge square piers to achieve a stable connection between the ladder cage and the pier, ensuring the safety of construction personnel going up and down. Background Technology

[0002] In highway bridge construction, square piers have become increasingly common due to their good structural stability and ease of construction. In particular, in actual projects, square piers not only cover a variety of fixed cross-sectional dimensions but also have variable cross-sectional designs, which places higher demands on the adaptability of the ladder cage attachment device.

[0003] Traditional ladder cage attachment methods are mainly divided into two categories: one is clamp attachment, which involves fixing the ladder cage to the pier surface using custom-sized clamps. However, this method has obvious drawbacks: first, it has a narrow scope of application, requiring clamps to be customized according to the specific cross-sectional dimensions of the pier, necessitating multiple replacements when dealing with piers with variable cross-sections, resulting in low material reuse rate; second, it is heavy, with a single clamp typically weighing over 400 kg, requiring workers to use a suspended platform for installation, posing a very high safety risk; and third, it has low installation efficiency, requiring multiple people to work together to assemble the clamps.

[0004] The second method is the pre-embedded steel plate attachment, where steel plates are embedded during the pier construction, and the ladder cage connectors are fixed to the embedded steel plates by welding or bolts in the later stages of construction. Although this method is relatively simple to operate, it has a fatal hidden danger: gaps can easily form between the embedded steel plate and the pier concrete, allowing rainwater and moisture to seep in and cause the steel plate to rust, forming "rust channels." Over time, this can lead to corrosion of the internal steel bars of the pier, causing irreversible damage to the main structure of the bridge and resulting in extremely high maintenance costs later on.

[0005] Currently, hydraulic climbing formwork is widely used in the construction of high piers in the industry. This process achieves stable attachment of the climbing formwork system through the cooperation of pre-embedded climbing cones and wall-mounting components, and has the advantages of convenient assembly and disassembly and minimal damage to the structure. If the core principle of this process can be applied to ladder cage attachment, it is expected to solve the pain points of traditional methods. Based on this, this utility model proposes a lightweight and safe ladder cage attachment pre-embedded device for square piers. Summary of the Invention

[0006] The purpose of this utility model is to provide a lightweight and safe pre-embedded device for attaching ladder cages to square piers, so as to solve the problems of narrow application range and high safety risk of traditional clamp-type attachment, and easy rust channel generation of pre-embedded steel plate attachment, and achieve the ladder cage attachment requirements of "wide application, safe installation and no structural damage".

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a lightweight and safe ladder cage attachment pre-embedded device applied to square pier columns, comprising a pre-embedded climbing cone, a high-strength screw, and a ladder cage connecting component; the pre-embedded climbing cone is pre-embedded during the casting and forming process of the square pier column, and the connecting end of the pre-embedded climbing cone protrudes from the surface of the pier column; one end of the high-strength screw is threadedly connected to the connecting end of the pre-embedded climbing cone, and the other end is detachably connected to the ladder cage connecting component; the end of the ladder cage connecting component away from the high-strength screw is fixed to the column of the ladder cage.

[0008] More preferably, the pre-embedded climbing cone includes a cone-shaped body and a connecting sleeve; the cone-shaped body is embedded inside the pier column; one end of the connecting sleeve is coaxially fixed with the cone-shaped body, and the other end extends out of the pier column surface to form a connecting end, and the inner wall is provided with an internal thread that matches the high-strength screw to ensure connection stability.

[0009] Preferably, the pre-embedded climbing cone is made of No. 45 tempered steel (high strength) with galvanized surface treatment; the high-strength screw is an 8.8 grade high-strength bolt with hot-dip galvanized surface for corrosion protection, ensuring corrosion resistance for long-term outdoor use.

[0010] The advantages of this application are as follows: This utility model discloses a lightweight and safe ladder cage attachment pre-embedded device for square pier columns, which includes a pre-embedded climbing cone, a high-strength screw rod, and a ladder cage connecting component; the pre-embedded climbing cone is pre-embedded during the casting of the square pier column, one end of the high-strength screw rod is threadedly connected to the pre-embedded climbing cone, and the other end is detachably connected to the ladder cage connecting component; the end of the ladder cage connecting component away from the high-strength screw rod is fixed to the ladder cage column. This device is not affected by changes in the cross-sectional dimensions of the square pier column, has a wide range of applications; it can be installed on a hydraulic climbing formwork modification platform, reducing operational safety risks; and it can eliminate the hidden danger of rust channels caused by traditional pre-embedded steel plates, causing no irreversible damage to the main structure of the bridge, and is lightweight and easy to assemble and disassemble. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the pre-embedded climbing cone structure in this practical application; Figure 2 This is a schematic diagram of the assembly of the overall device of this utility model with the square pier column and the ladder cage; The serial numbers in the diagram correspond to the following names: 1- Bolt bolt hole; 2- Cage connecting component; 3- Pier column; 4- Embedded climbing cone; 401- Conical body; 402- Connecting sleeve; 5- High-strength bolt. Detailed Implementation

[0012] To illustrate the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0013] Make holes on the pier formwork corresponding to the attachment position of the ladder cage, extend the connecting sleeve 402 of the pre-embedded climbing cone 4 out of the formwork, and fix the cone body 401 on the steel reinforcement cage to ensure that the axis of the pre-embedded climbing cone 4 is perpendicular to the surface of the pier. Pour the concrete and vibrate it to ensure it is compacted. Once the concrete strength reaches 70% of the design value, remove the formwork and clean the debris inside the connecting sleeve 402.

[0014] During implementation, screw one end of the high-strength screw rod 5 into the connecting sleeve 402 and the other end into the ladder cage connecting component 2. Rotate the high-strength screw rod 5 to adjust the distance between the ladder cage and the pier column 3. After adjusting to the correct position, tighten the screw rod to ensure that the clamp is secure. Regularly check the tightness of the high-strength screw 5, and tighten it promptly if it becomes loose; After the ladder cage is removed, first unscrew the high-strength screw 5, then use a special tool (such as a cone puller) to pull the pre-embedded climbing cone 4 out of the pier column 3 to form a pre-embedded hole; fill the pre-embedded hole with micro-expansion concrete, vibrate it to make it dense, and smooth the surface. After the concrete has initially set, attach the sealing cap to the opening of the pre-embedded hole with structural adhesive to complete the sealing.

[0015] This device, through the combination of pre-embedded climbing cones and detachable connectors, not only solves the compatibility and safety issues of traditional clamps, but also eliminates the risk of corrosion of pre-embedded steel plates. It can be widely used in the construction of ladder cage attachment for various square pier columns (including variable cross-sections), and has significant economic and safety benefits.

[0016] The embedded climbing cone 4 is made of No. 45 tempered steel with galvanized surface treatment; the high-strength screw 5 is an 8.8 grade high-strength bolt with hot-dip galvanized anti-corrosion treatment.

[0017] The above description is not intended to limit this application, nor is this application limited to the examples described above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this application should be protected by this application.

Claims

1. A lightweight and safe ladder cage attachment pre-embedded device for use on square piers, characterized in that: It includes a pre-embedded climbing cone (4), a high-strength screw (5), and a ladder cage connecting component (2); the pre-embedded climbing cone (4) is pre-embedded during the casting and forming process of the pier column (3), and the connecting end of the pre-embedded climbing cone (4) is exposed on the surface of the pier column (3); one end of the high-strength screw (5) is threadedly connected to the connecting end of the pre-embedded climbing cone (4), and the other end is detachably connected to the ladder cage connecting component (2); the end of the ladder cage connecting component (2) away from the pre-embedded climbing cone (4) is fixed to the column of the ladder cage.

2. The lightweight and safe ladder cage attachment pre-embedded device for square piers according to claim 1, characterized in that: The pre-embedded climbing cone (4) includes a cone-shaped body (401) and a connecting sleeve (402); the cone-shaped body (401) is embedded inside the pier (3), one end of the connecting sleeve (402) is coaxially fixed with the cone-shaped body (401), and the other end extends out of the surface of the pier (3) to form a connecting end; the inner wall of the connecting sleeve (402) is provided with an internal thread that matches the high-strength screw (5).

3. The lightweight and safe ladder cage attachment pre-embedded device for square piers according to claim 1, characterized in that: The embedded climbing cone (4) is made of No. 45 tempered steel with galvanized surface treatment; the high-strength screw (5) is an 8.8 grade high-strength bolt with hot-dip galvanized anti-corrosion treatment.

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