Erosion Control Mat with Protrusions and Flaps
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Solution Overview
Problem
Existing erosion control mats fail to effectively conform to underlying surfaces and prevent horizontal shifting and vertical uplifting of soil or other materials in areas with high water flow and turbulence, due to their rigidity and lightweight structure.
Innovation Solution
A heavyweight, flexible erosion control mat with protrusions and pore columns that extend through its thickness, featuring pressure-responsive flaps to manage water flow and secure the mat and underlying materials, allowing for modular construction and integration with supplemental ballast and geotextile fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid mat structure with smooth bottom surface is used, then the mat maintains structural stability, but it cannot closely conform to the underlying soil surface and requires fasteners for placement
Solution Approach 1:
The patent employs a flexible mat structure with a compliant bottom surface that can conform to irregular soil topography. The mat incorporates protrusions that extend through the thickness to mechanically interlock with the underlying surface, providing stability without requiring fasteners. This flexible design allows the mat to adapt to varying ground conditions while maintaining structural integrity under water flow loads.
Solution Approach 2:
The mat features a curved or contoured bottom surface with protrusions that follow the natural irregularities of the soil surface. This curvature enables the mat to wrap around and conform to uneven terrain, eliminating the need for rigid flat surfaces and fastener systems while maintaining stable placement in erosion control applications.
2Ease of operation
If lightweight buoyant materials are used for the mat, then the mat is easy to install and handles well, but it is incapable of resisting uplifting forces from turbulent water flow and wave action
Solution Approach 1:
The patent incorporates ballast elements within the mat structure that provide downward force to counteract the buoyant forces and uplifting pressures from turbulent water flow and wave action. This ballast system allows the mat to remain stable and anchored to the underlying surface without requiring heavy overall construction, maintaining ease of installation while providing sufficient resistance to hydrodynamic forces.
Solution Approach 2:
The mat utilizes a composite construction combining lightweight buoyant materials for ease of handling with integrated ballast components and reinforcement elements for strength. This composite approach allows the mat to exhibit both buoyant characteristics for easy deployment and sufficient weight and structural integrity to resist turbulent water forces and wave loading.
3Manufacturing precision
If an open matrix structure is used, then the mat allows water flow through it, but it is incapable of sufficiently preventing movement of soil particles beneath and through the structure
Solution Approach 1:
The patent employs a porous mat structure with controlled void spaces that allow water flow to pass through while providing mechanical filtration of soil particles. The pore size and distribution are optimized to permit hydraulic conductivity for drainage and flow-through applications while retaining fine soil particles that could be lost through the structure. This porous design addresses both water flow requirements and soil particle prevention needs.
Solution Approach 2:
The mat incorporates nested or layered structures where finer filtering elements are positioned within or between larger structural components. This nested arrangement creates multiple levels of particle retention while maintaining overall water flow permeability, effectively preventing soil particle loss through the mat structure while preserving hydraulic functionality.
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 mat effectively prevents soil erosion by conforming to the underlying surface, resisting wave action and turbulence, and reducing soil particle loss through its pore columns, while also providing a durable and safe surface for pedestrian and aquatic use.
Implementation Method 1
greater water flow force is needed to extract the soil particles up through the pore columns
Implementation Method 2
protrusions that extend and penetrate into the underlying surface to confine the soil or other particles beneath the mat and/or that prevent horizontal shifting of the mat during high stress water flow
Implementation Method 3
a top cover sheet with pressure reactive flaps that close during wave run-up to prevent erosion while allowing for the release of hydraulic pressure from beneath the soil
Data Source
AI summary
An erosion control ballast and soil confinement mat for use in water flow conditions is provided. The mat is made of a non-buoyant, relatively heavy and substantially flexible material with a plurality of pores stamped or pre-cast therein that allow for the inflow of water, the establishment of vegetation growth through the mat, and the in-filling of the pores with supplemental ballast materials such as gravel or soil. The bottom side of the mat has protrusions that extend into the underlying surface to prevent horizontal shifting and confine soil materials and/or another erosion control mat such as an erosion control blanket or turf reinforcement mat, while also preventing migration of the mat itself under high shear force water flow. The top surface of the mat may be provided with flaps that cover the pore openings during periods of strong water flow to prevent excessive water flow from entering the pores and eroding the underlying soil.