Precast Wall Section With Cavity For Concrete Injection
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Solution Overview
Problem
Conventional precast concrete wall sections lack the strength and durability needed to withstand large soil retention loads and are prone to failure under impact, while in-situ casting methods are costly and hazardous due to the high cost of shuttering systems and safety precautions.
Innovation Solution
The development of precast concrete wall sections with connecting cavities and apertures that allow concrete to flow between sections, combined with a method of aligning and filling these cavities to create a strong, reinforced wall structure similar to in-situ casting, using recesses for reinforcing rods and staggered long rods for additional reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional precast concrete wall sections are used, then construction speed and ease of assembly are improved, but strength and impact resistance deteriorate
Solution Approach 1:
The patent merges the advantages of precast sections with in-situ casting by filling cavities between adjacent wall sections with concrete. This creates a combined structure where precast sections provide construction speed while the injected concrete provides continuous bonding and impact resistance, resolving the contradiction between productivity and strength.
Solution Approach 2:
The wall section uses composite construction combining precast concrete sections with injected concrete material. The cavity between front and rear face portions is filled with concrete to create a composite structure that combines the benefits of both precast and in-situ methods, achieving both speed and strength.
2Strength
If in-situ concrete wall casting is used, then strength and durability are improved, but cost and safety hazards worsen
Solution Approach 1:
The patent divides the wall into precast sections that are manufactured separately and then assembled. This segmentation eliminates the need for expensive shuttering systems required for complete in-situ casting, while the cavity filling with concrete maintains durability, thus reducing cost while preserving strength.
Solution Approach 2:
The wall sections are precast off-site before final assembly. This preliminary action allows manufacturing to occur in a controlled environment without requiring expensive temporary shuttering structures, reducing overall construction cost while maintaining the ability to achieve strong, durable walls through cavity filling.
3Ease of operation
If individual precast wall sections are used, then ease of assembly is improved, but structural integrity under load deteriorates
Solution Approach 1:
The patent combines individual precast sections into a unified structure by injecting concrete into cavities between sections. This merging process creates continuous bonding that improves soil retention capability and structural integrity while maintaining the assembly convenience of precast sections.
Solution Approach 2:
The injected concrete acts as an intermediary material that bonds adjacent precast wall sections together. This intermediary substance creates a unified structural system that improves reliability and soil retention capability while preserving the ease of assembly provided by the modular precast sections.
Data Source
AI summary
The invention relates to a freestanding wall section and a method of constructing a wall. The invention provides a wall section for use in building a wall comprising: a wall portion having a front face portion and a rear face portion; a connecting portion connecting said front face portion to said rear face portion and defining a cavity therebetween; in which the connecting portion has an aperture for receiving concrete mix and which in use allows the concrete mix to fill said cavity. The invention also provides a method of building a wall using such wall sections.