A tufted geotextile includes a backing sheet tufted to resemble grass with polymeric yarns that when tufted form loops or bridges on a back side and tufts that extend as grass-like blades from an upper surface. Each line of tuft blades is tufted with a repeating stitching pattern generally of a weft portion along a tuft line first axis and warp portions disposed in a first direction at an angle to the first weft portion. The tufts define interstices that define cells that receive and trap infill for resisting displacement and movement of the infill under loading such as hydraulic flow or granular flow due to wind, seismic, vibrations, expansion and contraction loading, and the like. Each line of tuft blades is sewn along an alternating, interconnected “C-shaped” stitching pattern or square wave stitching pattern to define diverting tufts to restrict infill displacement and water flow.

A soil completely-covered structure includes a base layer, slope body filling soil and a buffering layer; the base layer is arranged around a vertical tank body and is made of a base material located on a ground floor, and a first filling gap is formed between the base layer and an outer wall of the vertical tank body; the slope body filling soil is arranged on the base layer, a second filling gap is formed between the side of the slope body filling soil and the outer wall of the vertical tank body, and a side slope surface is formed on the outer side of the slope body filling soil; and the buffering layer is formed in the first filling gap and the second filling gap, and the buffering material fills the first filling gap and the second filling gap to wrap the surface of the vertical tank body.

Systems and methods are provided for re-purposing discarded asphalt shingles as soil stabilizers in building and land surface constructions. Discarded (and typically “degraded”) Asphalt Shingles (DAS) are placed beneath building foundation slabs and parking lots in overlapping patterns to replace a measured amount of removed expansive soil to serve as a moisture barrier. DAS can be utilized beneath parking lots in areas of expansive soils by layering the shingles in overlapping patterns to create a moisture barrier from water intrusion from above or below. Building block system (BBS) units may be produced to facilitate handling and transport of the DAS materials to the construction site.

A capping assembly (10) for mounting on a covering (12) is disclosed. The capping assembly (10) comprises a cap (14) which can be disposed on the covering (12), a securing arrangement (18) to enable the capping assembly (10) to be secured on the covering (12). The capping assembly (10) further includes an insertion member (16) for insertion through the covering (12). The cap (14) can be attached to the insertion member (16). The securing arrangement (18) comprises a securing device (20) and a holding formation (44) to hold the securing device (20), the holding formation (44) being provided on the insertion member (16).

A structure and method for three-dimensional restoration of slope soil in an abandoned ion-absorbed rare earth mining area, belonging to the field of ecological restoration technologies. The structure for three-dimensional restoration of slope soil in an abandoned ion-absorbed rare earth mining area provided by the present invention includes an ecological water-harvesting pond, ecological intercepting ditches, an improved soil layer laid on the surface of a to-be-restored slope region and a soil restoration ecological network disposed on the improved soil layer. The improved soil layer, the ecological water-harvesting pond and the ecological intercepting ditches are each provided with a combined plant synusia system. The restoration structure provided by the present invention can effectively improve an extremely degraded ecological environment of the abandoned ion-absorbed rare earth mining area caused by tailings waste land and restore the degraded or polluted mining area soil and environment caused by mine destruction during rare earth mining.

A weight system for a landfill tarpaulin. A pair of parallel chains are retained within a pair of sleeves in the tarp. A plurality of parallel wire lines traverse the tarpaulin. A plurality of elongated coupler bodies are provided with each coupler body having a first end terminating in an eyelet, a second, opposed end terminating in a hollow recess, and an attached threaded protrusion to the underside of the body. A chain fastener passes through one eyelet, passes through one of the links of the chain, and passes through the sleeve of the tarp. A tarp fastener passes through a washer, passes through the tarp, passes through an optional washer, and is threadably connected to the elongated coupler body. Each end of the wire lines is received and held in place by the hollow recess.

A landfill gas recovery system includes a waste layer disposed in a landfill and a capping layer overlying the waste layer. The capping layer includes a cured sealing layer and a loose fill layer between the waste layer and the cured sealing layer. The loose fill layer includes a granular fill material. The cured sealing layer includes a composite of the granular fill material and a cured water soluble polymer. The cured sealing layer is substantially impermeable to landfill gases formed within the waste layer.

A landfill gas recovery system includes a waste layer disposed in a landfill and a capping layer overlying the waste layer. The capping layer includes a cured sealing layer and a loose fill layer between the waste layer and the cured sealing layer. The loose fill layer includes a granular fill material. The cured sealing layer includes a composite of the granular fill material and a cured water soluble polymer. The cured sealing layer is substantially impermeable to landfill gases formed within the waste layer.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system, the gas extraction system comprising well piping for coupling a plurality of wells to a gas output. The control system comprises a controller configured to: obtain a value indicating measured energy content of landfill gas collected at the gas output from the plurality of wells; determine whether the measured energy content is different from a target energy content; and in response to determining that the measured energy content is different from the target energy content: control a plurality of valves disposed in the well piping to change flow rates of landfill gas being extracted from at least some of the plurality of wells at least in part by changing degrees to which the plurality of valves are open.

A soil completely-covered structure includes a base layer, slope body filling soil and a buffering layer; the base layer is arranged around a vertical tank body and is made of a base material located on a ground floor, and a first filling gap is formed between the base layer and an outer wall of the vertical tank body; the slope body filling soil is arranged on the base layer, a second filling gap is formed between the side of the slope body filling soil and the outer wall of the vertical tank body, and a side slope surface is formed on the outer side of the slope body filling soil; and the buffering layer is formed in the first filling gap and the second filling gap, and the buffering material fills the first filling gap and the second filling gap to wrap the surface of the vertical tank body.