Sediment-control fences with anisotropic strength and stiffness properties
AssigneeFriendly Environment 14 LP
InventorsThomas Kyle Segroves, Stephen Matthew Sliger, Kevin Brian Wolfe, R. Alan Sutton
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Abstract
Sediment-control fences designed to withstand hydrostatic forces associated with elevated backwater against the fence are disclosed. The fences are made of anisotropic fabric having different mechanical properties such as strength and stiffness in the machine direction versus the transverse direction. The anisotropic fabric may include fibrillated yarns in one direction and monofilaments in another direction. The sediment-control fences may be used without the necessity of wire or chain-link backed supports that are conventionally used to resist structural failure due to hydraulic overtopping of the fences.
Claims24
A sediment-control fence comprising an anisotropic fabric having a lower grade line and an upper edge defining an installed height extending between the lower grade line and the upper edge, the anisotropic fabric comprising fibrillated yarn running in a transverse direction substantially parallel with the installed height, or running in a machine direction substantially parallel with a length of the anisotropic fabric, wherein a tensile strength of the anisotropic fabric in the machine direction remains substantially constant along the installed height.
A sediment-control fence system comprising:
- anchoring posts;
- and
- a sediment-control fence for attachment to the anchoring posts comprising an anisotropic fabric having a lower grade line and an upper edge defining an installed height extending between the lower grade line and the upper edge, the anisotropic fabric comprising fibrillated yarn running in a transverse direction substantially parallel with the installed height, or running in a machine direction substantially parallel with a length of the anisotropic fabric, wherein a tensile strength of the anisotropic fabric in the machine direction remains substantially constant along the installed height.
Dependencies are inferred from the claim text.