Polyconcrete Wall Unit Reinforcement Net Anchorage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Polyconcrete building units, due to their low compressive strength and specific weight, require additional reinforcement for structural integrity and lifting, but existing reinforcement methods fail to provide sufficient pull-out strength and deflection resistance, especially for roof units under snow loads.
Innovation Solution
Incorporating a reinforcement net into the polyconcrete units and anchoring lifting devices within the net to enhance pull-out strength and structural support, using tensile reinforcement alone for roof units to manage compression resistance without increasing deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If lifting devices are anchored only in polyconcrete without reinforcement net, then the structure remains simple, but the pull-out strength is insufficient
Solution Approach 1:
The patent combines polyconcrete with a reinforcement net to create a composite structure. The reinforcement net (made of steel wires or rods) is embedded within the polyconcrete matrix, forming a composite material system where the steel provides tensile strength and anchorage while the polyconcrete provides compressive strength and structural form. This composite approach resolves the contradiction by achieving sufficient pull-out strength through the steel reinforcement while maintaining relative structural simplicity.
Solution Approach 2:
The reinforcement net is strategically positioned and distributed within the polyconcrete unit, particularly around lifting device anchorages. This local concentration of reinforcement provides enhanced pull-out strength exactly where needed (at lifting points) without requiring reinforcement throughout the entire structure, thus resolving the contradiction between strength and complexity.
2Stability of the object's composition
If tensile reinforcement is added to polyconcrete units, then deflection resistance improves, but the low compressive strength becomes a limiting factor
Solution Approach 1:
The patent creates a composite material system where steel reinforcement (providing tensile strength and deflection resistance) is combined with polyconcrete (providing compressive strength). The reinforcement net or bars are embedded within the polyconcrete matrix, forming a composite structure where each material contributes its superior property: steel for tension/deflection control and polyconcrete for compression. This resolves the contradiction by achieving both deflection resistance and maintaining awareness of compressive strength limitations.
Solution Approach 2:
The patent modifies the structural parameters by introducing reinforcement density, arrangement, and configuration as controllable variables. By adjusting the reinforcement ratio, spacing, and layout of the steel net or bars within the polyconcrete, the deflection resistance can be optimized while accounting for the inherent compressive strength limits of the polyconcrete material.
3Productivity
If wall units are made large to reduce quantity, then installation efficiency improves, but lifting and handling becomes more difficult
Solution Approach 1:
The patent incorporates lifting devices (such as loops, eyes, or integrated lifting points) directly into the polyconcrete units during manufacturing or formwork stage. This preliminary integration of lifting functionality allows large units to be easily handled and installed by providing predetermined, structurally sound attachment points, thus resolving the contradiction between large size for efficiency and ease of handling.
Solution Approach 2:
The reinforcement net serves multiple functions: it provides structural reinforcement for deflection resistance, enhances pull-out strength at anchorage points, and facilitates lifting and handling when integrated with lifting devices. This multi-functionality resolves the contradiction by making the same structural element (reinforcement net) serve both structural and handling purposes.
Data Source
Figure 1
Figure 2
AI summary
A wall unit (1) cast of super light concrete containing at least 50 % by volume expanded plastic material is provided with a reinforcing net (2) which forms the anchorage for lifting devices (3). The lifting devices (3) can have the form of a reinforcing rod being bent at an angle and having a hook (4) at each end for hooking to the reinforcement (2). Furthermore, the lifting devices (3) are welded to the reinforcement (2). A roof unit (6) having generally tensile reinforcement (7) and four lifting devices (8) anchored to the tensile reinforcement is also disclosed.