Installation method of prefabricated box girder pedestal convenient to disassemble

Abstract

The invention relates to the technical field of box girders, in particular to an installation method of a prefabricated box girder pedestal convenient to disassemble. S1, a plurality of rows of bolt sets are pre-buried in the machining site in parallel; and S2, foundation concrete pouring is conducted on the machining site, and the tops of the bolt sets are located above the elevation of the foundation. And S3, after the foundation concrete is solidified, the I-shaped steel is jointly installed on the tops of the bolt sets in each row to serve as a supporting cross beam. And S4, L-shaped supporting longitudinal beams are welded to the two sides of the top of the supporting cross beam correspondingly. And S5, steel plates are laid between the horizontal sections of the supporting longitudinal beams. Due to the fact that detachable connection modes such as bolt connection and welding are adopted, the whole pedestal can be conveniently detached after a project is finished and used for other projects, the resource utilization rate is greatly improved, the construction cost is reduced, the construction efficiency and the resource utilization rate are improved, environment pollution is reduced, and the construction cost is reduced. The method is an important innovation in the modern prestress construction technology.

Description

Technical Field

[0001] The invention relates to the technical field of box beams, and in particular to an installation method for a prefabricated box beam pedestal which is easy to disassemble. Background Art

[0002] In the development history of prestressed construction technology in my country, prestressed box girders have become an important structural form in civil engineering fields such as bridges and buildings due to their significant advantages such as high strength, good durability and convenient construction. Especially in bridge engineering, prestressed box girders have been widely used, and a large number of highway and railway bridges have adopted standardized post-tensioning prestressed construction. In recent years, with the acceleration of urbanization and the continuous advancement of infrastructure construction, prestressed box girder technology has played an increasingly important role in various large, medium and small bridge projects.

[0003] However, in the manufacturing process of prestressed box girders, we are faced with a key problem: the relationship between the box girder and the base. In the manufacturing process of prestressed box girders, the relationship between the box girder and the base is crucial, because the base is the basis for supporting and fixing the box girder, which directly affects the manufacturing quality and construction efficiency of the box girder. In traditional construction, in order to facilitate the transportation of box girders and ensure the construction period, the box girder manufacturing and processing site is often temporarily built nearby according to the specific construction project, and the base is mostly designed for one-time use or difficult to disassemble. This temporary processing site and base are often difficult to effectively dismantle and reuse after the project is completed, which not only causes a waste of resources, but also may pollute the environment. Especially in projects that require frequent transfer of construction sites, the non-removability of traditional bases has become an important factor restricting construction efficiency. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem, thereby providing a method for installing a reusable and easily disassembled prefabricated box beam pedestal.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution: A method for installing a prefabricated box beam pedestal that is easy to disassemble comprises the following steps: S1: Several rows of bolt groups are embedded in parallel on the processing site.

[0006] S2: Concrete pouring of the foundation is carried out at the processing site, and the top of the bolt group is located above the elevation of the foundation.

[0007] S3: After the foundation concrete solidifies, an I-beam is installed on the top of each row of bolt groups as a supporting beam.

[0008] S4: L-shaped supporting longitudinal beams are welded on both sides of the top of the supporting cross beam.

[0009] S5: Steel plates are laid between the horizontal sections of the supporting longitudinal beams.

[0010] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: Due to the use of detachable connection methods such as bolt connection and welding, the entire pedestal can be easily disassembled after the project is completed and used in other projects, which greatly improves resource utilization, reduces construction costs, simplifies the construction process of box girder manufacturing and processing sites, reduces the construction and dismantling time of temporary processing sites, shortens the construction period, and improves overall construction efficiency. Traditional bases are often difficult to effectively dismantle and reuse after the project is completed, resulting in waste of resources. This easy-to-disassemble prefabricated box girder pedestal can avoid this problem, reduce the generation of construction waste, and is beneficial to environmental protection. This method not only improves construction efficiency and resource utilization, but also helps to reduce environmental pollution. It is an important innovation in modern prestressed construction technology.

[0011] Preferably, a further technical solution of the present invention is: Furthermore, each row of bolt groups includes at least two U-shaped bolts, and two ends of the U-shaped bolts respectively penetrate through two sides of the lower wing plate of the supporting beam and are fixed by nuts.

[0012] Furthermore, the distance between the U-bolt and the end of the supporting beam is at least 200 mm.

[0013] Furthermore, the spacing between adjacent bolt groups is between 1.8 and 2.2 meters.

[0014] Furthermore, the length of the supporting beam is between 1 and 1.2 meters.

[0015] Furthermore, the supporting longitudinal beam and the supporting cross beam are fixed by spot welding to facilitate subsequent dismantling work.

[0016] Furthermore, the height of the vertical section of the supporting longitudinal beam is between 35-50 mm.

[0017] Furthermore, the thickness of the steel plate is between 10-15 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the side structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of a top cross-sectional structure of an embodiment of the present invention; Marked in the figure: foundation 1, U-bolt 2, supporting cross beam 3, supporting longitudinal beam 4, steel plate 5. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0020] A method for installing a prefabricated box beam pedestal that is easy to disassemble comprises the following steps: S1: Several rows of bolt groups are embedded in parallel on the processing site. The spacing between adjacent bolt groups is between 1.8-2.2 meters, and a total of ten rows are set.

[0021] S2: Concrete pouring of foundation 1 is carried out at the processing site, and the top of the bolt group is located above the elevation of foundation 1.

[0022] S3: After the concrete of foundation 1 solidifies, an I-beam is installed on the top of each row of bolt groups as a supporting beam 3. The length of the supporting beam 3 is between 1-1.2 meters. Each row of bolt groups includes at least two U-bolts 2. The two ends of the U-bolts 2 respectively pass through the two sides of the lower wing plate of the supporting beam 3 and are fixed by nuts. The distance between the U-bolts 2 and the end of the supporting beam 3 is at least 200mm. After the pedestal is removed, the top of the U-bolts 2 located above the foundation 1 is cut off.

[0023] S4: L-shaped supporting longitudinal beams 4 are welded on both sides of the top of the supporting crossbeam 3. The vertical section height of the supporting longitudinal beam 4 is between 35-50mm. The vertical section of the supporting longitudinal beam 4 is responsible for supporting the side formwork of the box beam. The supporting longitudinal beam 4 and the supporting crossbeam 3 are fixed by spot welding for subsequent dismantling work.

[0024] S5: Steel plates 5 are laid between the horizontal sections supporting the longitudinal beams 4. The steel plates 5 support the bottom formwork of the box beam. Adjacent steel plates 5 along the length direction are fixed by welding. The thickness of the steel plates 5 is between 10-15 mm.

[0025] The box girder is manufactured between the steel plate 5 and the vertical section of the supporting longitudinal beam 4. Due to the use of detachable connection methods such as bolt connection and welding, the entire pedestal can be easily disassembled after the project is completed and used for other projects, thereby greatly improving resource utilization, reducing construction costs, simplifying the construction process of the box girder manufacturing and processing site, reducing the construction and dismantling time of the temporary processing site, shortening the construction period, and improving the overall construction efficiency. The traditional base is often difficult to effectively dismantle and reuse after the project is completed, resulting in a waste of resources. This easy-to-disassemble prefabricated box girder pedestal can avoid this problem, reduce the generation of construction waste, and is beneficial to environmental protection. This method not only improves construction efficiency and resource utilization, but also helps to reduce environmental pollution. It is an important innovation in modern prestressed construction technology.

[0026] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A method for installing a prefabricated box beam pedestal that is easy to disassemble, characterized in that: The steps include: S1: Several rows of bolts are embedded in parallel on the processing site; S2: Concrete pouring of foundation is carried out at the processing site, and the top of the bolt group is located above the elevation of the foundation; S3: After the foundation concrete solidifies, an I-beam is installed on the top of each row of bolt groups as a supporting beam; S4: L-shaped supporting longitudinal beams are welded on both sides of the top of the supporting cross beam; S5: Steel plates are laid between the horizontal sections of the supporting longitudinal beams.

2. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: Each row of bolt groups includes at least two U-shaped bolts, and two ends of the U-shaped bolts respectively penetrate through two sides of the lower wing plate of the supporting beam and are fixed by nuts.

3. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 2 is characterized in that: The distance between the U-bolts and the ends of the supporting beams should be at least 200 mm.

4. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: The spacing between adjacent bolt groups is between 1.8 and 2.2 meters.

5. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: The length of the supporting beams is between 1 and 1.2 meters.

6. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: The supporting longitudinal beams and supporting cross beams are fixed by spot welding to facilitate subsequent dismantling work.

7. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: The height of the vertical section of the supporting longitudinal beam is between 35-50mm.

8. The method for installing the detachable and reusable prefabricated box beam pedestal according to claim 1 is characterized in that: The thickness of the steel plate is between 10-15mm.

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