Rectangular Fiber Sheet for Sediment Control
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Solution Overview
Problem
Conventional wattles and logs for perimeter sediment control, slope length shortening, and check dam applications are inefficient due to their circular shape, which results in inadequate contact with the ground, requiring additional installation steps and leading to performance issues and inefficient use of space for transportation and storage.
Innovation Solution
A fiber sheet system comprising a nonwoven natural fiber felt with a rectangular cross-section and attached netting, where the fiber sheet has a high area density and a ratio of height to width that allows for effective sediment control, with stakes and netting sections designed to secure and reinforce the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional circular wattles and logs are used, then they can be constructed by stuffing filler into a netting tube, but they result in inadequate ground contact and require additional installation steps such as trenches and anchoring ropes
Solution Approach 1:
The patent changes the cross-sectional shape from circular to rectangular, creating an asymmetric form that allows the entire perimeter to contact the ground uniformly. This rectangular configuration eliminates the gaps that occur with circular shapes, providing continuous ground contact along the entire length of the wattle or log without requiring additional anchoring measures
2Ease of manufacture
If conventional circular logs are used, then they can be constructed with netting and filler, but water flows between the log and ground, undercutting the log and defeating its purpose
Solution Approach 1:
The rectangular cross-section creates continuous contact between the log and ground, eliminating the gaps that allow water to flow underneath. This asymmetric shape ensures that the entire perimeter engages with the ground surface, preventing water from undercutting the structure and maintaining its effectiveness in sediment control applications
3Reliability
If conventional thick wattles and logs are used, then they provide sediment control function, but they occupy excessive space and reduce the number of linear meters that can be transported and stored per pallet
Solution Approach 1:
The patent optimizes the dimensional parameters by changing from circular to rectangular cross-section, which allows for more efficient packing arrangements during transportation and storage. The rectangular shape enables better stacking and utilization of pallet space, increasing the number of linear meters that can be transported per pallet while maintaining the necessary thickness for effective sediment control
Data Source
AI summary
A fiber sheet system suitable for controlling erosion and stabilizing soil is described that comprises a fiber sheet comprising a natural fiber felt. The fiber sheet has a top side width smaller than the height and the length of the fiber sheet. A netting contacts the front and rear sides of the fiber sheet.