Hollow Floor Slab Formwork Splicing for Lightweight Construction
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Solution Overview
Problem
Existing building construction methods face challenges with heavyweight thermal insulation roofs that are incompatible with design requirements and pose load-bearing risks, and sound insulating floorslabs with poor soundproofing due to high concrete cross-sectional areas.
Innovation Solution
A lightweight hollow floorslab formwork system featuring a flat plate with supporting legs, protective plates, and reversely-fastened plates for easy splicing and concrete pouring, reducing weight and enhancing sound insulation by minimizing the concrete's cross-sectional area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal insulation bricks are used to create a leakage-proof roof with thermal insulation layer, then the roof achieves leakage-proof and thermal insulation effects, but the weight of the roof increases greatly, rendering it incompatible with building design requirements and posing load-bearing risks
Solution Approach 1:
The patent uses a waterproof membrane layer (thin film) combined with a lightweight thermal insulation layer to achieve leakage-proof and thermal insulation effects without the heavy weight of traditional thermal insulation bricks. The thin film structure provides effective waterproofing while maintaining lightweight construction.
Solution Approach 2:
The patent changes the material parameters from heavy thermal insulation bricks to lightweight thermal insulation materials (such as polystyrene foam or polyurethane foam), achieving the same thermal insulation effect with significantly reduced weight, thus resolving the contradiction between reliability and weight.
2Reliability
If thermal insulation bricks are laid to form thermal insulation layer, then the roof structure is completed, but the construction process requires additional cement filling between bricks, increasing construction complexity and time consumption
Solution Approach 1:
The patent extracts and eliminates the complex multi-step construction process involving cement filling between bricks. By using an integrated waterproof membrane layer combined with a continuous thermal insulation layer, the construction process is simplified to direct layering without additional filling operations, reducing both complexity and time consumption.
Solution Approach 2:
The patent merges the waterproofing function and thermal insulation function into a integrated structure where the waterproof membrane layer works in conjunction with the thermal insulation layer, eliminating the need for separate cement filling steps and simplifying the overall construction process.
3Object-affected harmful factors
If expandable polystyrene spheres are arranged in concrete layer with steel bars, then sound insulating effects are achieved by changing sound transmission area and medium, but the cross-sectional area of concrete still accounts for 40% to 50%, resulting in poor sound insulating effects
Solution Approach 1:
The patent uses porous or hollow structural elements (such as hollow floor slab formwork with cavity structures) instead of solid concrete with scattered polystyrene spheres. The porous/hollow structure provides superior sound insulation by creating air gaps and reducing sound transmission paths, while minimizing the actual concrete material volume, thus resolving the contradiction between sound insulation effectiveness and concrete quantity.
Data Source
AI summary
The present invention provides a hollow floorslab formwork, a hollow floorslab structure and a construction method of hollow floorslab. The hollow floorslab structure is formed by splicing together a plurality of hollow floorslab formworks, and the hollow floorslab formworks each comprise a flat plate portion (1). A lower portion of the flat plate portion is provided with a plurality of supporting legs (4), and an outer edge of the flat plate portion is provided with a frame (2) comprising a plurality of protective plates (21, 22, 23,24). The protective plates are each provided with a reversely-fastened plate (31, 32), and adjacent hollow floorslab formworks are spliced together by fastening the reversely-fastened plates on the protective plates. The construction method comprises the following steps: a first hollow floorslab formwork is laid first; other periphery on a former hollow floorslab formwork, except the periphery provided with a reversely-fastened plate, is spliced with a latter hollow floorslab formwork, and the reversely-fastened plate of the latter hollow floorslab formwork is fastened on the protective plate of the former hollow floorslab formwork.