Advanced Geotech Systems LLC

Other

Tenax Corporation

Aigen Zhao

Peter J Ianniello

Giovanni Capra

Gary L Shaffer

Numerous embodiments of one or more layers of void-maintaining synthetic drainable base courses ('VMSDBC's') are provided as incorporated into landfills and other waste containment facilities.

Drainable base course for a landfill and method of forming the same

A myriad of permutations of void-maintaining membrane laminates are provided. Laminates of the invention are particularly useful for providing high performance drainage within layered paved structures such as highways, airport runways and parking lots. Void-maintaining laminates of the invention comprise compression elements that are shaped, adapted and arranged to cooperate with base and upper layers such that superior flow capacities are attained through their void spaces, channels and paths, even under pressures in excess of 5,000 lbs per square inch.

High-flow void-maintaining membrane laminates, grids and methods

Numerous embodiments of a synthetic drainable base course (&ldquo;SDBC&rdquo;), and paved structures that may advantageously include an SDBC, are provided. As a key advantage of SDBC's according to the invention, they are of sufficient capacities and structural strength to be used within layered paved structures such as highways, airport runways and parking lots, to provide drainage superior to that afforded by conventional means and methods involving the use of open graded base courses that are typically formed of natural soils and aggregate and are extremely expensive to install. The invention includes means and methods that use conventional heavy equipment for installing an SDBC during the construction of a roadway or other paved surface.

Void-maintaining synthetic drainable base courses and methods for extending the useful life of paved structures

Unitary void-maintaining geocomposites, and drainage systems utilizing those geocomposites, are provided for location below a road surface or below a large structure such as a building, retaining wall or parking lot. In some embodiments, the geocomposites include at least one fluid-transmissible layer, preferably a geotextile, attached adjacent an upper or lower surface, or both surfaces, of a polymer-based core element. In other embodiments, the core element is constructed such that no geotextile layer is needed. Characteristic of the core element is high transmissivity, that is, a high rate of horizontal flow of gases or liquids through the core. Characteristic of the at least one fluid-transmissible layer is high permittivity, that is, a high rate of vertical transmission of liquids and gases through the geotextile layer and into the core element. Also characteristic of fluid-transmissible layers of the invention is high exclusivity with respect to solid materials. Core elements and fluid-transmissible layers can be formed simultaneously as a unit, or the several components may be bonded to one another by welding or adhesives. The systems include further drain means that communicate with the geocomposite structures of the system, such as perforated pipes and the like, which can connect further to culverts, ditches or waterways. The geocomposite structures and drain means may be placed below the subgrade, over the subgrade, or at the top and bottom of the base underlying a roadway or large structure. Unitary void-maintaining geocomposites can form part of a greater subsurface geosynthetic system that provides reinforcement, separation, and drainage for the structure to thereby extend its useful life and decrease maintenance costs.

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Clarksville, MD, United States of America

Aigen Zhao