Secondary grouting construction device and method for top truss column foot of reverse building method supporting column

Abstract

The invention discloses a secondary grouting construction device and method for a top truss column foot of a reverse building method supporting column, and belongs to the technical field of building construction. The construction device comprises a steel plate hoop assembly and a grouting funnel, the steel plate hoop assembly is formed by assembling two L-shaped steel plates with bolt connection lug buckles and mounting bolts, the steel plate hoop assembly is detachably fixed to the top of a steel column through the mounting bolts, and the grouting funnel is matched with a truss column bottom plate grouting hole. The construction method comprises the steps that the L-shaped steel plates are assembled and fixed to form the grouting baffle, grouting materials are poured into the gap between the steel column and the truss column bottom plate through the funnel, and after the grouting materials reach the design strength, the assembly is disassembled and cleaned for recycling. Scaffolds do not need to be erected, assemblies are convenient to disassemble and assemble and can be repeatedly used, the construction efficiency is greatly improved compared with a traditional wood pattern mode, the comprehensive cost is reduced, the grouting quality is stable, universality is high, the requirement for green construction is met, and the method is suitable for secondary grouting construction of the roof truss through the reverse building method.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a secondary grouting construction device and method for supporting the top truss column base of a column using the reverse construction method. Background Technology

[0002] When using the reverse construction method for the roof truss of a factory building, the steel columns are constructed first, and the floor slabs are constructed after the roof truss is completed. Before constructing the roof truss, grouting within the steel columns must be completed, and the concrete encasing of the upper parts of the steel columns begins after the roof truss is finished. During the installation of the roof truss structure, the gap between the top of the steel columns and the bottom plate of the truss columns requires secondary grouting. Since the bottom plate of the truss columns is larger than the cross-section of the main structural steel columns, traditional grouting uses wooden molds as templates for the grout material. This method requires scaffolding support below the templates, resulting in low construction efficiency and high costs. Summary of the Invention

[0003] To address the aforementioned problems, this invention discloses a secondary grouting construction device and method for the top truss column foot of a support column using the reverse construction method, thereby solving the technical defects of low construction efficiency and high cost in the prior art where the secondary grouting construction of the top truss column foot of a support column using wooden formwork and scaffolding is employed.

[0004] A secondary grouting construction device for the top truss column foot of a support column using a reverse construction method includes a steel plate clamp assembly and a grouting funnel;

[0005] The steel plate clamp assembly is composed of two L-shaped steel plates and mounting bolts. Each L-shaped steel plate has two bent ends forming bolt connection lugs, each lug having a bolt connection hole. The two L-shaped steel plates are joined together via the bolt connection lugs to form a square frame structure matching the cross-sectional dimensions of the steel column, with the inner side of the square frame structure tightly fitted to the outer perimeter of the steel column. The mounting bolts pass through the bolt connection holes to securely connect the two L-shaped steel plates, allowing the square frame structure to be detachably fixed to the top outer perimeter of the steel column.

[0006] The grouting funnel is detachably installed at the grouting hole of the truss column base plate to inject grout into the gap between the top of the steel column and the truss column base plate.

[0007] Preferably, the thickness of the L-shaped steel plate is 5.5 to 6.5 mm.

[0008] Preferably, the bolt connection hole is an oblong through hole.

[0009] Preferably, the grouting funnel is made of steel plate, and the lower opening size of the grouting funnel is adapted to the grouting hole size of the truss column base plate.

[0010] Preferably, both ends of each L-shaped steel plate are bent at 45° to form the bolt connection lugs. After two L-shaped steel plates are joined together, the bolt connection lugs fit together one by one.

[0011] In addition, this invention also discloses a method for secondary grouting at the top truss column base of a support column using the reverse construction method. The method employs the aforementioned secondary grouting device for the top truss column base of a support column using the reverse construction method, and includes the following steps:

[0012] Step 1: Assemble two L-shaped steel plates into a square frame structure by connecting them with bolts and fastening them with bolts. Then, use mounting bolts to pass through the bolt connection holes and tighten them to make the square frame structure detachably fixed to the outer perimeter of the top of the steel column, forming a grouting material baffle that fits tightly with the outer perimeter of the steel column.

[0013] Step 2: Open grouting holes on the bottom plate of the truss column, detachably install the grouting funnel at the grouting hole, and inject grouting material into the gap between the top of the steel column and the bottom plate of the truss column through the grouting funnel until the gap is completely filled with grouting material.

[0014] Step 3: After the grout has solidified to the design strength, loosen the installation bolts, remove the L-shaped steel plate and grouting funnel, and clean the residual grout on the component surface for subsequent secondary grouting construction of the steel column.

[0015] Compared with the prior art, the above invention has at least one of the following advantages or beneficial effects:

[0016] 1) Significantly Improved Construction Efficiency: This invention assembles grouting baffles using steel plate clamp components, which can be directly and detachably fixed to the top of the steel column. This eliminates the need for erecting and dismantling scaffolding support systems, greatly simplifying the construction process, reducing preparation and finishing time, and significantly improving construction efficiency. Furthermore, the ease of assembly and dismantling of the components further enhances construction convenience.

[0017] 2): The core components of this invention are all made of steel, which can be reused multiple times, avoiding the material waste of traditional wooden molds that are used only once, and greatly reducing material costs; at the same time, it saves the labor costs of scaffolding erection and dismantling, and the overall construction cost can be reduced by more than 70%.

[0018] 3) The square frame structure formed by the steel plate clamp assembly fits tightly with the outer periphery of the steel column, providing good sealing performance and effectively preventing the overflow or leakage of grout. The precise guiding effect of the grouting funnel ensures that the grout can fill the entire gap evenly and fully, improving the connection strength between the steel column and the truss column and ensuring structural safety.

[0019] 4) The steel plate clamp assembly can be adapted to steel columns with different cross-sectional dimensions through the size adjustment function of the waist-shaped through hole, which is suitable for secondary grouting scenarios of various reverse construction roof trusses; the assembly can be reused, reducing wood consumption and construction waste generation, which is in line with the industry development trend of green construction and energy conservation and environmental protection. Attached Figure Description

[0020] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; the emphasis is on illustrating the gist of the invention.

[0021] Figure 1 This is a schematic diagram of the structural state of the steel plate clamp assembly in an embodiment of the present invention;

[0022] Figure 2 This is a top view of the steel plate clamp assembly installed on the steel column in an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0024] Figure 4 This is a schematic diagram of the secondary grouting construction device for the top truss column foot of the reverse construction method in an embodiment of the present invention;

[0025] Among them, 1. Steel plate clamp assembly; 11. L-shaped steel plate; 12. Bolt connection lugs; 13. Mounting bolts; 2. Auxiliary mechanism; 2. Steel column; 3. Truss column; 4. Base plate; 5. Grouting funnel; 6. Secondary grouting material. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but these are not intended to limit the scope of the invention.

[0027] Example 1

[0028] As shown in Figures 1-4, this embodiment discloses a secondary grouting construction device for the top truss column foot of a support column using the reverse construction method. Specifically, the construction device includes a steel plate clamp assembly 1 and a grouting funnel 5. The steel plate clamp assembly 1 is assembled from two 6mm thick L-shaped steel plates 11 and mounting bolts 13 (generally ordinary bolts are sufficient). Both ends of each L-shaped steel plate 11 are bent at 45° to form bolt connection lugs 12. After the two L-shaped steel plates 11 are joined together, the bolt connection lugs 12 fit together one-to-one. The bolt connection lugs 12 are provided with bolt connection holes, which are oblong through holes. These oblong through holes are used to achieve dimensional fine-tuning when assembling the two L-shaped steel plates 11. This allows the frame structure to be adapted to steel columns 2 with a certain range of cross-sectional dimensions, improving the versatility of the device and avoiding the problem of being unable to assemble due to slight deviations in the cross-sectional dimensions of the steel columns 2. Two L-shaped steel plates 11 are joined together by bolted connecting lugs 12 to form a square frame structure that matches the cross-sectional dimensions of the steel column 2, and the inner side of the square frame structure is tightly fitted to the outer perimeter of the steel column 2. The mounting bolts 13 are inserted into the bolt connection holes to fasten the two L-shaped steel plates 11, so that the square frame structure can be detachably fixed to the top outer perimeter of the steel column 2. This eliminates the need for wooden formwork and additional scaffolding to form a grouting baffle, simplifying the construction process. The grouting funnel 5 is detachably installed at the grouting hole of the bottom plate 4 of the truss column 3 to inject grout into the gap between the top of the steel column 2 and the bottom plate 4 of the truss column 3. Its function is to guide the grout to flow precisely into the gap between the top of the steel column 2 and the bottom plate 4 of the truss column 3 to form a secondary grouting layer 6, avoiding grout spillage and improving the accuracy and fullness of grouting.

[0029] Specifically, the grouting funnel 5 is made of steel plate, and the lower opening size of the grouting funnel 5 is adapted to the grouting hole size of the bottom plate of the truss column 3.

[0030] Example 2:

[0031] This embodiment discloses a method for secondary grouting at the base of a truss column at the top of a support column using the reverse construction method. The method employs the secondary grouting device for the truss column base at the top of a support column using the reverse construction method described in Embodiment 1 above. The method includes the following steps:

[0032] Step 1: Assemble two L-shaped steel plates by connecting them with bolts to form a square frame structure. Insert mounting bolts through the bolt holes and tighten them, allowing the square frame structure to be detachably fixed to the outer perimeter of the steel column, forming a grouting material baffle that fits tightly against the outer perimeter of the steel column. At this point, the inner side of the square frame structure is tightly fitted to the outer perimeter of the steel column, forming a grouting material baffle that prevents grouting material from overflowing. This step requires no scaffolding support and is convenient and efficient.

[0033] Step 2: Open grouting holes on the bottom plate of the truss column. Detachably install a grouting funnel at the grouting hole. Slowly inject grout into the gap between the top of the steel column and the bottom plate of the truss column through the grouting funnel until the gap is completely filled with grout. During the injection process, the injection speed needs to be controlled to avoid air bubbles caused by injecting too quickly. At the same time, continuously observe the grouting situation until the gap is completely filled with grout and the grout slightly overflows from the edge of the gap, indicating that the grouting is full, and stop the injection.

[0034] Step 3: After the grout has solidified to the design strength (usually C40 or higher, depending on the construction design requirements), use a wrench to loosen the mounting bolts, remove the L-shaped steel plate and grouting funnel, and clean the removed L-shaped steel plate, mounting bolts, and grouting funnel to remove any residual grout. Check the components for damage. If the components are intact, they can be directly transferred to the secondary grouting area of ​​the next steel column and the above steps can be repeated for recycling.

[0035] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0036] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A secondary grouting construction device for the top truss column base of a support column using the reverse construction method, characterized in that, Includes steel plate clamping assemblies and grouting funnels; The steel plate clamp assembly is composed of two L-shaped steel plates and mounting bolts. Each L-shaped steel plate has two bent ends forming bolt connection lugs, each lug having a bolt connection hole. The two L-shaped steel plates are joined together via the bolt connection lugs to form a square frame structure matching the cross-sectional dimensions of the steel column, with the inner side of the square frame structure tightly fitted to the outer perimeter of the steel column. The mounting bolts pass through the bolt connection holes to securely connect the two L-shaped steel plates, allowing the square frame structure to be detachably fixed to the top outer perimeter of the steel column. The grouting funnel is detachably installed at the grouting hole of the truss column base plate to inject grout into the gap between the top of the steel column and the truss column base plate.

2. The secondary grouting construction device for the top truss column foot of the reverse construction method as described in claim 1, characterized in that, The thickness of the L-shaped steel plate is 5.5 to 6.5 mm.

3. The secondary grouting construction device for the top truss column foot of the reverse construction method as described in claim 1, characterized in that, The bolt connection hole is a waist-shaped through hole.

4. The secondary grouting construction device for the top truss column foot of the reverse construction method as described in claim 1, characterized in that, The grouting funnel is made of steel plate, and the lower opening size of the grouting funnel is adapted to the grouting hole size of the truss column base plate.

5. The secondary grouting construction device for the top truss column foot of the reverse construction method as described in claim 1, characterized in that, Both ends of each L-shaped steel plate are bent at 45° to form the bolt connection lugs. After two L-shaped steel plates are joined together, the bolt connection lugs fit together one by one.

6. A method for secondary grouting at the base of a truss column at the top of a support column using a reverse construction method, characterized in that... The construction method using the reverse construction method for secondary grouting of the truss column base at the top of the support column according to any one of claims 1 to 5 includes the following steps: Step 1: Assemble two L-shaped steel plates into a square frame structure by connecting them with bolts and fastening them with bolts. Then, use mounting bolts to pass through the bolt connection holes and tighten them to make the square frame structure detachably fixed to the outer perimeter of the top of the steel column, forming a grouting material baffle that fits tightly with the outer perimeter of the steel column. Step 2: Open grouting holes on the bottom plate of the truss column, detachably install the grouting funnel at the grouting hole, and inject grouting material into the gap between the top of the steel column and the bottom plate of the truss column through the grouting funnel until the gap is completely filled with grouting material. Step 3: After the grout has solidified to the design strength, loosen the installation bolts, remove the L-shaped steel plate and grouting funnel, and clean the residual grout on the component surface for subsequent secondary grouting construction of the steel column.

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