Method for manufacturing self-tapping screw aggregate connecting structure of fabricated composite wallboard and non-overhanging composite roof

Abstract

The invention discloses a self-tapping screw aggregate connecting structure of a fabricated composite wallboard and a non-overhanging composite roof and a construction method, and belongs to the technical field of fabricated concrete building structure engineering. The self-tapping screw block is a composite wallboard with a force transmission steel plate, an inner and outer leaf single-row reinforcing mesh concrete thin plate of a composite parapet wall, a composite roof with linear and L-shaped connecting steel plates, and a built-in steel structure concrete thin wallboard block with the thickness of the outer contour concrete thin plate of a force transmission steel plate area connected through self-tapping screws. And high-performance mortar is laid between the composite roof and the composite wall plate as well as between the composite roof and the composite parapet wall, so that a connection structure with concentrated force transmission of the self-tapping screw blocks and continuous force transmission of the post-cast strips for cooperative stress is formed. The connecting structure has the technical advantages of being good in connecting shear resistance and durability, the roof, the heat preservation plates at the joints of the roof, the wallboards and the parapet wall are continuous, the joints of the composite wallboards and the roof are filled with polystyrene foam, the thermal performance is good, and the connecting structure is suitable for construction of ultra-low-energy-consumption houses.

Description

technical field [0001] The invention relates to a block connection structure and method of self-tapping nails for an assembled composite wall panel and a composite roof without an overhang, and belongs to the technical field of assembled concrete building structure engineering. Background technique [0002] The technology research and development of ultra-low energy consumption houses has drawn great attention from the engineering community at home and abroad. However, at present, the construction technology of low-storey and ultra-low energy consumption houses in villages and towns, especially the prefabricated construction technology, is very lacking. The technical bottleneck problems existing in the prior art are: (1) The building (house) cover of the traditional prefabricated concrete shear wall structure mostly adopts the laminated floor cover, which has a large amount of cast-in-place, a long construction period, and poor thermal insulation performance. Cold bridges a...

AI Technical Summary

Problems solved by technology

However, at present, the construction technology of low-storey ultra-low energy consumption houses in villages and towns, especially the prefabricated construction technology is very lacking

The technical bottleneck problems existing in the prior art are: (1) The floor (house) cover of the traditional prefabricated concrete shear wall structure mostly adopts a laminated floor cover, which has a large amount of cast-in-place, a long construction period, and poor thermal insulation performance. It is easy to form cold bridges at the joints between the cover and the wall and the floor slabs, which is difficult to apply to the construction of ultra-low energy consumption houses

At the same time, the joints of the floor are affected by the ambient temperature and the freeze-thaw cycle, so it is difficult to guarantee the waterproof performance; (2) The traditional precast concrete shear wall and the building (roof) have thick steel bars and large spacing, and the cracking of the wall and floor slabs It is relatively common and has a great impact on the waterproof and thermal insulation performance of buildings

(3) Most of the traditional parapet walls without overhanging eaves are built with masonry structures, which are difficult to meet the needs of building assembly due to their heavy weight, poor seismic performance, and long construction period

(4) The traditional shear wall steel plate and roof bolt connection technology is not suitable for the assembly of the inner and outer leaf single-row reinforced mesh concrete thin-slab sandwich polystyrene board wall panels and composite roofs, because the inner and outer leaf wall boards are sandwiched between polystyrene boards. The polystyrene board is not allowed to drill holes and bolts, which makes it difficult to assemble the composite wall panel concrete thin wall panel and the composite roof concrete thin panel separately with the traditional steel plate bolt connection technology; (5) the price of self-tapping screws The price is much lower than that of bolts. The connection between the cold-formed thin-walled steel of the light steel keel structure is connected by self-tapping nails. The self-tapping nails penetrate the two connected light steel keels successively. The self-tapping nails are occluded and there is no extrusion friction; however, the assembly of the single-row reinforced mesh concrete thin-slab sandwich polystyrene board wall panels and composite roofs of the inner and outer leaves belongs to the assembly of reinforced concrete wall panels and composite roofs, and at the same time Friction and occlusal force are required. It is obvious that the current technology of directly connecting light steel keels with self-tapping nails is significantly different from the assembly of composite wall panels and composite roofs and their force transmission requirements; (5) the traditional prefabricated reinforced concrete roof The plywood is cast-in-place assembly at the support end and the concrete beam or shear wall through the post-cast belt. The structure of the parapet and waterproof layer needs to be carried out after the roof construction and maintenance are completed. The construction period is long, the cost is high, and the project quality is difficult to guarantee.

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