Polymer Concrete Underground Enclosure for Vehicular Loads and Water
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Solution Overview
Problem
Existing enclosures for electrical devices are not designed to withstand vehicular traffic and often fail under such loads, and they may not adequately prevent liquid ingress, limiting their installation locations and durability.
Innovation Solution
The enclosure is constructed from polymer concrete, capable of supporting vehicular loads and includes a design that prevents liquid ingress while housing electrical components, with a movable lid and a GFCI system to protect against water damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an enclosure is constructed from plastic material to reduce cost, then manufacturing cost is reduced, but the enclosure cannot support vehicular traffic loads
Solution Approach 1:
The patent applies composite materials by combining polymer concrete with reinforcing elements such as steel rebar or wire mesh within the enclosure structure. This composite construction provides both the cost-effectiveness of polymer-based materials and the structural strength needed to support vehicular traffic loads, resolving the contradiction between manufacturing cost and load-bearing capacity.
2Reliability
If an enclosure is designed to prevent liquid ingress through sealing, then electrical device protection is improved, but the enclosure cannot adequately support heavy vehicular loads
Solution Approach 1:
The patent uses polymer concrete composite materials that inherently provide both structural strength for vehicular load support and resistance to liquid infiltration. The composite structure maintains integrity under heavy loads while the material properties prevent liquid ingress, simultaneously addressing both reliability and strength requirements.
Solution Approach 2:
The patent implements localized sealing measures at critical joints and penetrations within the enclosure structure, rather than requiring complete sealing of the entire structure. This allows the majority of the enclosure to be constructed with load-bearing polymer concrete material, while specific local areas receive enhanced sealing treatment to prevent liquid ingress.
3Ease of operation
If an enclosure uses simple plastic construction for ease of installation, then installation complexity is reduced, but the enclosure fails under vehicular traffic
Solution Approach 1:
The patent divides the enclosure into modular segments that can be individually installed and then assembled together. Each module is pre-fabricated with reinforcement structures, allowing for simplified on-site installation while maintaining the structural integrity needed to support vehicular traffic loads.
Data Source
AI summary
An underground enclosure system includes an underground enclosure, a ground-fault circuit interrupter (GFCI), and an electrical outlet. The underground enclosure includes a base with a first wall that at least partially defines an internal volume. The wall includes a lip that extends into the internal volume. A lid is coupled to the base to at least partially enclose the volume. The lid can contact the lip and be received at least partially within the internal volume. The GFCI is disposed within the base and can receive electrical power. The electrical outlet is in electrical communication with the GFCI. The electrical outlet is positioned downstream from the GFCI. The electrical outlet can connect to an external electrical device and provide power to the external electrical device.