Edge-closing and opening-closing construction method for joint of prefabricated bearing platform moulding bed and cushion layer

Abstract

The invention relates to an edge closing and opening closing construction method for a joint part of a prefabricated bearing platform moulding bed and a cushion layer. The edge closing and opening closing construction method is characterized by comprising the following steps of a, mounting a prefabricated bearing platform template, b, measuring, positioning and paying off, c, pasting a grout stop strip, d, mounting a cushion layer wood template on an upper opening of a prefabricated brick moulding bed, e, pouring cushion layer concrete, and f, removing the template and cleaning. The edge closing and opening closing construction method for the joint of the prefabricated bearing platform moulding bed and the cushion layer has the advantages that the forming quality of the prefabricated rotary moulding bed at the joint of the prefabricated rotary moulding bed and the cushion layer is ensured, the forming effect of the edge closing and opening closing part is ensured to be excellent at one time, the construction progress is improved, the construction quality is ensured, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, in particular to a construction method for closing the edge of a junction between a prefabricated foundation formwork and a cushion layer. Background Art

[0002] Prefabricated foundation formwork is generally made of fine aggregate cement hollow prefabricated board formwork. It is formed by mixing fly ash, cement, and construction debris evenly and then uniformly extruding it in a production machine. It has good integrity and is a green building material that reuses construction debris.

[0003] Common prefabricated cap formwork dimensions are 90mm thick, 600mm wide, and 2000mm-3200mm long. Custom lengths can also be produced based on the on-site cap dimensions. Prefabricated brick formwork is also commonly used in projects, but the quality of the edge and joint finish is poor, affecting the quality of subsequent waterproofing.

[0004] Therefore, there are above-mentioned various inconveniences and problems in the use of known prefabricated brick mold. Summary of the Invention

[0005] The purpose of the present invention is to provide a safe and reliable construction method for finishing the edge and closing the junction of a prefabricated foundation formwork and a cushion layer.

[0006] To achieve the above objectives, the technical solution of the present invention is: A construction method for closing the edge of the junction between a prefabricated foundation formwork and a cushion layer, characterized by comprising the following steps: a. Installation of prefabricated foundation template According to the size of the prefabricated cap, complete the installation of the prefabricated cap template, and control the completion elevation of the prefabricated cap template at the bottom elevation of the concrete cushion layer; b. Measurement, positioning and laying out On the completed prefabricated brick formwork, a control line is drawn on the bottom edge of the prefabricated brick formwork according to the width of the cushion wood formwork; c. Paste the stop strip According to the control line of the prefabricated brick formwork, paste the mortar stop strip of the formwork on the top of the prefabricated brick formwork; d. Install the wooden formwork on the upper edge of the prefabricated brick formwork The width of the wooden formwork is determined according to the thickness of the concrete cushion layer. The lower edge of the precast brick formwork is increased by 50mm to coincide with the precast brick formwork. A square wooden rib is nailed to the center of the cushion layer formwork to increase the overall rigidity of the formwork. The lower edge of the formwork is closely attached to the precast formwork according to the control line and is nailed securely with cement nails. After measuring the squareness of the upper edge of the precast brick formwork, add diagonal supports at the corners. e. Pouring of cushion concrete When pouring the cushion concrete, for the joints with the formwork, the parts that cannot be vibrated by mechanical vibration are vibrated in place by inserting and tamping, and the joints are smooth; f. Demolding and cleaning When the concrete strength is ≥2.5MPa, the formwork shall be removed. After the formwork is removed, it shall be sorted and cleaned, the stop strips shall be removed and the base surface shall be cleaned; g. Construction of subsequent processes Carry out subsequent construction processes such as waterproofing.

[0007] The construction method for finishing the edge and the joint of the prefabricated foundation formwork and the cushion layer of the present invention can be further implemented by adopting the following technical measures.

[0008] The aforementioned method, wherein the slurry stop strip is straightly pasted on a 20 mm wide template.

[0009] In the aforementioned method, the width of the slurry stop strip is ≥20 mm.

[0010] After adopting the above technical solution, the construction method of closing the edge of the junction between the prefabricated foundation formwork and the cushion layer of the present invention has the following advantages: 1. Ensure the molding quality of the prefabricated tire transfer mold at the junction with the cushion layer; 2. Ensure the molding effect of the edge and seam is excellent in one go; 3. Improve construction progress, ensure construction quality and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the appearance of a prefabricated foundation template according to an embodiment of the present invention; Figure 2 This is a schematic plan view of the edge and end of a prefabricated cap template according to an embodiment of the present invention; Figure 3 for Figure 2 Cross-sectional view of AA; Figure 4 for Figure 2 Cross-sectional view of the middle BB; Figure 5 This is a schematic diagram of the closing node after the cushion layer is cast in an embodiment of the present invention.

[0012] In the figure: 1 diagonal support rod, 2 prefabricated brick formwork, 3 closing formwork, 4 supporting square timber, 5 backfill soil, 6 cement nails, 7 square timber back ribs, 8 wooden formwork, 9 mortar stop strips, 10 concrete cushion layer. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments and the accompanying drawings.

[0014] Example 1 The process flow of the construction method for closing the edge of the junction between the prefabricated foundation formwork and the cushion layer of the present invention is as follows: Installation of prefabricated foundation formwork → measurement, positioning and marking → pasting of stop grout strips → installation of upper cushion wooden formwork (nail the lower end to the prefabricated formwork with cement nails) → measurement of formwork squareness and installation of corner braces → pouring of cushion concrete → removal of side formwork without damaging corners → cleaning of formwork → subsequent waterproofing work.

[0015] Please refer to Figure 1-Figure 5 The method for finishing the interface between the prefabricated foundation formwork and the cushion layer of the present invention comprises the following steps: 1. Prefabricated template installation Complete the installation of precast formwork for the precast cap according to the dimensions of the precast cap. The precast formwork should be installed at the same elevation as the bottom of the concrete cushion. The formwork should be 15mm thick and glued together, with a width equal to the cushion width + 50mm (to fit closely with the precast brick formwork).

[0016] 2. Measurement, positioning and laying out On the completed prefabricated brick formwork, draw a control line at the bottom according to the width of the cushion wood formwork.

[0017] 3. Paste the stop strip According to the control line on the prefabricated brick formwork, stick a 20mm wide template stop strip straightly on the upper edge of the prefabricated formwork, ensuring that the stop strip is stuck straight and close to the prefabricated brick formwork.

[0018] 4. Install the wooden formwork for the upper concrete cushion The width of the wooden formwork 8 is determined based on the thickness of the concrete cushion 10. The lower edge is extended 50mm to coincide with the precast formwork. A 40mm x 90mm square timber backing rib 7 is nailed to the center of the cushion formwork to increase overall formwork rigidity. The lower edge of the formwork is aligned closely to the precast formwork according to the control line and secured with cement nails 6. After measuring the upper edge for squareness, diagonal corner supports are added. Support timbers 4 are 40mm x 90mm square timbers (for corner supports and formwork backing ribs). Cement nails are 30mm-40mm long and secure the lower edge of the formwork to ensure a close fit between the wooden formwork and the precast formwork.

[0019] 5. Pouring of cushion concrete When pouring the cushion layer, for the intersection with the closing formwork 3, the parts that cannot be vibrated by mechanical vibration are vibrated into place by inserting and tamping, so that the closing is smooth.

[0020] 6. Demolding and cleaning When the concrete strength is ≥2.5MPa (without damaging the edges and corners), the formwork can be removed. After the formwork is removed, it should be sorted and cleaned, the stop-grouting strips should be removed and the base surface should be cleaned.

[0021] 7. Post-process construction Carry out subsequent construction processes such as waterproofing.

[0022] The method for finishing the edges and closing the junction of the prefabricated pedestal formwork and the cushion layer of the present invention has been put into practical use in the Guangzhou Convention and Exhibition Center project. The project has a ground construction area of 68,000 square meters. The construction is simple and convenient, with fewer steps and more economical costs. By controlling the elevation of the upper opening of the prefabricated pedestal formwork, using stop strips and triangular supports, the requirements for the strength and stiffness of the formwork support are met, the one-time forming quality of the finishing is guaranteed, and a good base surface is provided for the construction of the waterproof layer. The construction quality of the junction between the prefabricated formwork and the cushion layer is effectively improved. The method is easy to master and easy to promote and use, and has been unanimously recognized by the supervision unit and the construction unit, welcomed by the operators, and has achieved good economic benefits and social impact.

[0023] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Persons skilled in the art may make various modifications or variations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions are intended to fall within the scope of the present invention and are defined by the claims.

Claims

1. A construction method for closing the edge of the junction between the prefabricated platform formwork and the cushion layer, characterized in that The following steps are involved: a. Installation of prefabricated foundation template According to the size of the prefabricated cap, complete the installation of the prefabricated cap template, and control the completion elevation of the prefabricated cap template at the bottom elevation of the concrete cushion layer; b. Measurement, positioning and laying out On the completed prefabricated brick formwork (2), a control line is drawn at the bottom of the prefabricated brick formwork according to the width of the cushion wood formwork; c. Paste the stop strip According to the control line of the prefabricated brick mold, the stopper strip (9) of the template is pasted on the upper edge of the prefabricated brick mold; d. Install the wooden formwork on the upper edge of the prefabricated brick formwork The width of the wooden formwork is determined according to the thickness of the concrete cushion layer (10). The lower edge of the precast brick formwork is increased by 50 mm to coincide with the precast brick formwork. A square wooden back rib (7) is nailed to the center of the cushion layer formwork to increase the overall rigidity of the formwork. The lower edge of the formwork is closely attached to the precast formwork according to the control line and is nailed firmly with cement nails (6). After measuring the squareness of the upper edge of the precast brick formwork, an oblique support (1) is added to the corner. e. Pouring of cushion concrete When pouring the cushion concrete, for the joints with the formwork, the parts that cannot be vibrated by mechanical vibration are vibrated in place by inserting and tamping, and the joints are smooth; f. Demolding and cleaning When the concrete strength is ≥2.5MPa, the formwork shall be removed. After the formwork is removed, it shall be sorted and cleaned, the stop strips shall be removed and the base surface shall be cleaned; g. Construction of subsequent processes Carry out subsequent construction processes such as waterproofing.

2. The method for finishing the edge of the junction between the prefabricated foundation formwork and the cushion layer according to claim 1, characterized in that: The stop strip is pasted straight on the 20mm wide template.

3. The method for finishing the edge of the junction between the prefabricated foundation formwork and the cushion layer according to claim 1, characterized in that: The width of the slurry-stopping strip is ≥20 mm.

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