Modular Interlocking Green Roof System with Capillary Mat
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Solution Overview
Problem
Existing green roof systems face challenges with water management, root rot, and weight distribution, making it difficult to create a continuous bed of soil on rooftops while ensuring easy transportability and safety, especially with traditional tray systems that are labor-intensive and prone to erosion.
Innovation Solution
A modular interlocking system with a base layer featuring reservoirs to prevent water flow and interlocking portions, combined with a water-permeable layer and detachable walls for soil containment, allowing for pre-vegetation and easy installation, which includes a capillary fabric mat for moisture regulation and root stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a continuous bed of soil is used on rooftops, then even distribution of vegetation and water reserves is improved, but soil placement becomes labor intensive and difficult to transport
Solution Approach 1:
The continuous soil bed is divided into modular trays that can be independently filled, transported, and installed. Each tray contains a portion of the growing media and vegetation, allowing for easier handling and placement on rooftops while maintaining the continuous bed configuration when assembled together.
Solution Approach 2:
The trays are pre-filled with growing media and pre-vegetated before installation on the rooftop. This preliminary preparation of soil placement and vegetation establishment occurs ground-level where equipment and materials are more accessible, significantly reducing on-roof labor intensity and transport requirements.
2Ease of operation
If trays filled with growing media and vegetation are used, then transportability and arrangement flexibility are improved, but water management problems such as root rot and insufficient watering occur
Solution Approach 1:
The water management system is segmented into multiple functional layers within each tray: a water-permeable barrier layer prevents excessive water accumulation at the bottom, while a capillary fabric mat layer distributes water evenly throughout the growing media. This segmented approach to water management prevents both root rot from waterlogging and insufficient watering.
Solution Approach 2:
A water-permeable barrier layer is introduced as an intermediary between the tray bottom and the growing media to regulate water flow and prevent water accumulation that causes root rot. Additionally, a capillary fabric mat acts as an intermediary to wick and distribute water uniformly throughout the soil, ensuring reliable water management.
3Ease of operation
If trays are used to contain soil, then transportability is improved, but erosion control and root entanglement are compromised
Solution Approach 1:
A capillary fabric mat layer is introduced as a flexible thin film within the tray system. This fabric mat provides erosion control by stabilizing the growing media and allowing root entanglement for anchorage, while still permitting water and air movement. The flexible nature of the fabric mat maintains transportability of the trays.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively manages water distribution, prevents root rot, and ensures a continuous soil bed on rooftops, reducing labor costs and enhancing the longevity of the green roof by providing a stable and evenly distributed soil depth, while allowing for easy transport and installation.
Implementation Method 1
A composite mat is employed to regulate moisture content through diffusion and capillary movement
Implementation Method 2
A composite mat is employed to regulate moisture content through diffusion and capillary movement
Implementation Method 3
A composite mat is employed to regulate moisture content through diffusion and capillary movement
Implementation Method 4
a base layer having a plurality of reservoirs configured to prevent water flow through a lower portion
Data Source
AI summary
A modular unit, system and method include a base layer having a plurality of reservoirs configured to prevent water flow through a lower portion, the lower portion for contacting a support surface, and having interlocking portions configured to interlock adjacent base layers when installed. A water permeable layer is disposed over the base layer. A detachable wall is mountable on the base layer to contain planting media. The water permeable layer may include a water-holding capillary fabric mat layer with entangled filaments.