Abstract:
A sealing arrangement for a pole assembly having a tubular base, a tubular upper mast of smaller diameter, and a cladding. An end of the upper mast is inserted within an end of the base and a portion of the base overlaps the upper mast and is fastened thereto, with the cladding surrounding the base. The sealing arrangement comprises a transition ring and a seal assembly. The transition ring surrounds a portion of the base, upper mast and cladding. The transition ring having an internal downwardly facing surface, and the seal assembly is disposed within said transition ring to seal between the external surface of the upper mast and the transition ring. The seal assembly comprising a sealing plate and a seal disposed between the downwardly facing surface and the sealing plate, and the sealing action of the seal assembly is actuated by the sealing plate squeezing said seal.
Abstract:
Geocomposite articles that can provide a barrier against high conductivity water e.g., ocean water, are described and their method of manufacture, for waterproofing surfaces that contact high conductivity water. The geocomposite article mat includes a woven or non- woven geotextile sheet or mat containing a powdered or granular partially cross-linked acrylamide/acrylate/acrylic acid copolymer across its entire major surface(s). The powdered or granular copolymer has an unexpectedly high free-swell when hydrated with High Conductivity water, such as ocean water. A liquid-impermeable cover sheet is adhered to the upper major surfaces of the filled copolymer-carrying geotextile to provide a primary high conductivity water barrier layer that, if ruptured, is sealed by the swell of an underlying layer of water-insoluble, partially cross-linked acrylamide/acrylic acid copolymer.
Abstract:
An advanced containment system for containing buried waste (102) and associated leachate. A series of small diameter parallel tunnels (410) are serially excavated using a micro tunneling machine (400, 302). Steel tubes are placed in each tunnel and are interlocked with tubes in adjacent tunnels. The tubes are then filled with grout.
Abstract:
The invention relates to fine mineral powder with the following state variables:, a particle size of essentially up to 0.1 mm; a density of 0.9 to 1.2 kg/l; 7-12 % water; 0.5-3.5 % Na2O; and a specific surface per volume of particles of essentially 0.25 to 0.5 m /cm . The fine mineral powder is quick-dried into a microporous state. The evaporation-drying process is carried out over a short residence time and at a low product temperature, preferably with an inlet temperature of 300-700 DEG C and an outlet temperature less than/equal to 85 DEG C, without exceeding a safe inner particle temperature of approximately 60 DEG C. The resulting microporous fine grit has defined material properties, is stable in cement and forms excellent impervious wall materials with various types of cement.
Abstract:
Aground water flow device (1) has a support element (3) and a filter sheet (5). The filter sheet has a first side (7) and a second side (9). Tubes (13) are provided with flow apertures (11) which are large enough to allow the passage of water and soil particles. The tubes (13) each have an inner space (17). The tubes (13) each hold one of the filter sheets (5) in their inner space (17).A first part of the flow apertures (11) is facing the first side (7) of the filter sheets (5) and a second part of the flow apertures (1) is facing the second side (9) of the filter sheets (5), defining in each tube (13) a flow path (19) for ground water from the first part of the flow apertures (11) through the filter sheet (5) to the second part of the flow apertures (11).
Abstract:
A method is disclosed for constructing a diaphragm wall by casting alternate primary (10, 11) and secondary (20) panels in the ground. The primary panels (10, 11) are excavated and cast first, and a cutter joint (15) or similar jointing profile is then milled into the side faces of the primary panels (10, 11) before casting the secondary panels (10). The primary panel casting regions are prepared for casting by positioning sacrificial displacement elements (31) in the regions where joint milling is to be performed. The sacrificial displacement elements (31) may be hollow elements or blocks of relatively easily millable material such as lightweight concrete. Primary panels (10, 11) cast in this way can be milled more easily, and particularly when the milling tool is at an angle to the surface being milled.
Abstract:
A cutting/mixing tool for thin diaphragm walls mounted at the end of at least one drilling rod (47) moved by a slidable assembly (42, 62) along a tower (41), carried by an operating drilling machine (40); the tool (45) being characterized in that it is made up of a body (10), which bears in its central part two digging/mixing wheels (20a, 20b) provided on the periphery with cutting means (82) and set alongside one another at a minimum distance (d) and coaxial about an axis (x) substantially perpendicular to the direction of digging (z); the wheels (20a, 20b) projecting from slits (81) of the body (10), which contains at least partially means (1-4, 50-52) for transmission of motion to the wheels, said means being positioned externally with respect to the wheels.
Abstract:
Processes and methods relating to treating contaminants and collecting desired substances from a zone of interest using subterranean collection and containment barriers. Tubular casings having interlock structures are used to create subterranean barriers for containing and treating buried waste and its effluents. The subterranean barrier includes an effluent collection system. Treatment solutions provided to the zone of interest pass therethrough and are collected by the barrier and treated or recovered, allowing on-site remediation. Barrier components may be used to in the treatment by collecting or removing contaminants or other materials from the zone of interest.