The present invention relates generally to building, shoring, drainage and flood control structures and, in particular, to these structures having at least one side covered with synthetic turf.
As described in
Such prior art arrangements generally suffer from being unsightly due to the exposed flexible sheet material (geotextile or sheet film). They also suffer from having a limited life, as UV radiation tends to break down the flexible sheet material (geotextile or sheet film), leading to premature failure.
Generally described, the present invention relates to earthwork basket-like structures utilizing synthetic turf to improve weatherability (longevity in spite of being exposed to wind, rain, and sun) and to improve the visual aesthetics. These earthwork baskets are typically made of wire or mesh cage or a basket and have common industry names of gabion, gabion mattress, gabion basket, reno mattress, or concentainer. These earthwork baskets are typically used for applications involving flood control, flood barriers, retaining walls, walls and barriers, drainage channels, grade control, erosion control, shoreline and coastal protection, and slope reinforcement.
In a first example embodiment, the present invention comprises an earthwork basket including a multi-sided wire or mesh cage or basket which optionally can be erected from a flat, folded configuration to an erect, fillable configuration. The earthwork basket also includes a liner for lining at least part of the multi-sided cage. The liner is made from a synthetic turf comprising a backing and a plurality of synthetic grass blades tufted into and extending from the backing. In example forms, the backing is comprised of one or more geotextile(s), which optionally may be coated to increase tuft bind. The synthetic turf is placed along at least one side of the multi-sided cage. In example embodiments, the synthetic turf is placed along one side or face of the cage, while in other embodiments the synthetic turf is placed along multiple sides or faces of the cage.
The earthwork basket can take various shapes, such as cylindrical, cubic, brick, block, triangular, oval, L-shaped, V-shaped, etc. In one form, the multi-sided cage has 2 sides. In a preferred form, the multi-sided cage has 6 sides.
Preferably, the synthetic turf faces outwardly from the multi-sided cage and optionally the synthetic turf is positioned along multiple sides of the multi-sided cage. Preferably, the synthetic turf is installed on the inside face(s) of the multi-sided cage and optionally the synthetic turf is installed on the outside face(s) of the multi-sided cage.
Optionally, one or more sides of the multi-sided cage can be lined with a geotextile and/or sheet film liner. Thus, the synthetic turf need not be used on every face or side of the cage, although it can be so used if desired.
In another example embodiment, the present invention relates to a bundle of earthwork basket-like blocks including a plurality of earthwork basket-like blocks mechanically fastened to one another to form a bundle. Each earthwork basket-like block has a wire or mesh cage or basket structure optionally erectable from a folded configuration to an erect fillable configuration and a liner for containing loose fill material within the earthwork basket-like block. The liner includes a synthetic turf positioned along at least one portion of the earthwork basket-like block, with the synthetic turf including a synthetic backing and a plurality of synthetic blades tufted to and extending from the synthetic backing. The synthetic turf is oriented in the earthwork basket-like block so that the synthetic blades extend and face outwardly from the earthwork basket-like block.
The specific techniques and structures employed to improve over the drawbacks of the prior devices and accomplish the advantages described herein will become apparent from the following detailed description of example embodiments and the appended drawings and claims.
Generally described, the present invention relates to earthwork basket constructions for preventing erosion on flood control structures, channels, and slopes; for providing reinforcement to walls and slopes; and for creating a barrier.
In example embodiments, the earthwork basket 10 is filled with rock, gravel, soil materials, sand, shredded tires, ash, soil colliery waste, small particular aggregate, other loose material, or cementitious material. In one preferred form, the earthwork basket is filled with soil. Preferably, when the earthwork basket 10 is filled with soil, the liner 30 is utilized to contain the soil within the basket 20. Optionally, an additional secondary liner 40 can be provided along one or more faces of the basket 20 as desired. For example, as depicted in
In example forms, the basket 20 can be constructed from steel, galvanized steel, zinc-coated steel, stainless steel, PVC-coated steel, aluminum, fiberglass, or polymeric material. Generally, the basket 20 has junctions that are welded, fused, single twisted, double twisted, or woven together. In typical forms, the basket is double twisted or welded together. Preferably, the earthwork basket 10 can take various shapes, such as cylindrical, cubic, brick, block, triangular, oval, L-shaped, V-shaped, and various other shapes as desired. Preferably, the basket 20 can be erected from a flat, folded configuration to an erect, fillable configuration. Preferably, the synthetic turf is affixed to the one or more faces of the basket 20 by heat bonding, adhesive bonding, stitching or sewing, mechanical fasteners, or combinations thereof.
Preferably, the earthwork basket 10 is modular and is capable of being stacked on top of another earthwork basket 10. Optionally, the earthwork basket 10 can be placed side-by-side or butted end-to-end with one or more additional earthwork baskets 10.
Optionally, the synthetic turf comprises synthetic blade-like elements tufted into a synthetic backing. Preferably, the synthetic turf is used as a principal component of the system. It can be constructed using a knitting machine or tufting machine that may use, for example, over 1,000 needles to produce a turf width of about 15 feet. Preferably, the synthetic turf includes synthetic grass blades which comprise polyethylene monofilament and/or slit-film fibrillated and non-fibrillated fibers tufted to have a blade length of between about 0.5 inches and 4 inches. Other polymers can be used for the synthetic grass blades, as desired. Preferably, the synthetic grass blades are tufted to have a blade length of between about 1.5 inches and 3 inches. Most preferably, the synthetic grass blades are tufted to have a blade length of about 1.5 inches. Optionally, the synthetic grass blades are tufted to have a density of between about 20 ounces/square yard and about 120-ounces/square yard. Preferably, the synthetic grass blades have a thickness of at least about 100 microns.
The synthetic grass blades are tufted into the substrate or backing comprising a synthetic woven or non-woven fabric. Moreover, this backing can be a single-ply backing or can be a multi-ply backing, as desired. Optionally, the backing fabric may be coated to increase the tuft bind resistance.
The chemical composition of the synthetic turf components should be selected to resist degradation by exposure to sunlight, which generates heat and contains ultraviolet radiation. The polymer yarns should not become brittle when subjected to low temperatures. The selection of the synthetic grass color and texture should be aesthetically pleasing.
The grass-like components preferably consist of green or tan polyethylene fibers 41 of about 1.5 to about 2.5 inches in length tufted into a woven or non-woven fabric. For added strength, an additional fabric component backing can be tufted for improving dimensional stability. The polyethylene grass filaments 41 preferably have an extended operational life of at least 15 years.
Advantageously, the earthwork basket construction according to the present invention provides a good barrier from flooding and other threats, good protection against erosion in flood control and drainage structures, and good reinforcement of walls and slopes. The present earthwork basket construction has good durability, low-cost, excellent erosion control and water control, and a rather natural, pleasant appearance.
It is to be understood that this invention is not limited to the specific devices, methods, conditions, or parameters of the example embodiments described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only. Thus, the terminology is intended to be broadly construed and is not intended to be unnecessarily limiting of the claimed invention. For example, as used in the specification including the appended claims, the singular forms "a," "an," and "the" include the plural, the term "or" means "and/or," and reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. In addition, any methods described herein are not intended to be limited to the sequence of steps described but can be carried out in other sequences, unless expressly stated otherwise herein.
While the claimed invention has been shown and described in example forms, it will be apparent to those skilled in the art that many modifications, additions, and deletions can be made therein without departing from the spirit and scope of the invention as defined by the following claims.
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.