Abstract:
An adjustable manhole cover frame assembly for mounting on a manhole basin upper section (12 ) has an outer ring (22) and an inner ring (20) engaging the outer ring by screw threads and supporting the manhole cover (10). The lower annular surface of the frame assembly rests on a convexly curved surface (36C) of a metallic adapter (36), which in turn rests on the generally flat surface ( 12A) of the manhole basin upper section (12); this allows the orientation of the frame assembly to be adjusted. Also, the frame assembly itself may have parts which allow its upper part to be adjusted for slope when the lower part of the frame assembly has been fixed. Another feature is a hinge mechanism (16) having a hinge arm (74) connecting two pivots (72,76), and having interlocking means (18) which prevent the hinge side of the cover from being raised when the cover is closed.
Abstract:
Freeze wells may be used to isolate an area for soil remediation. Freeze wells may form a frozen barrier around a treatment area. The frozen barrier may inhibit fluid from entering into the treatment area. The frozen barrier may also inhibit migration of contamination out of the treatment area. The frozen barrier may be used to surround all of the perimeter of the treatment area. A frozen barrier may also be formed above or below a treatment area. Freeze wells may be activated in advance of soil remediation so that a frozen barrier is formed when soil remediation is begun. The soil remediation may be accomplished by any type of soil remediation system, including a thermal soil remediation system. Heaters of a thermal soil remediation system may be may be placed close to the frozen barrier without the barrier being broken through during remediation.
Abstract:
Die Erfindung betrifft ein Verfahren zur Erzeugung eines zusammenhängenden Eiskörpers (100, 200) in einem Erdbodenbereich (1), wobei erste Kühllanzen (10) in den Erdbodenbereich (1) eingebracht werden, in dem der zusammenhängende Eiskörper (100, 200) in Gegenwart einer den Erdbodenbereich (1) durchströmenden Strömung (S) eines fluiden Strömungsmittels, insbesondere in Form von Grundwasser, zu erzeugen ist, wobei ein erster Kälteträger (T) in die ersten Kühllanzen (10) eingeleitet wird, und wobei weiterhin zumindest eine zweite Kühllanze (20) auf einer strömungszugewandten Seite (2) der ersten Kühllanzen (10) in den Erdbodenbereich (1) eingebracht wird und ein zweiter Kälteträger (T'), der eine Temperatur aufweist, die niedriger ist als die Temperatur des ersten Kälteträgers (T), in die mindestens eine zweite Kältelanze (20) eingeleitet wird, um die Ausbildung eines zusammenhängenden Eiskörpers (100, 200) zu unterstützen, der sämtliche Kühllanzen (10, 20) umschließt.
Abstract:
A device for current generation and storage with superconductors in the cold sink in which a shelved store (1) has been set up in difficult ground after a cold wall (2) has been formed by the cold sink. Air is to be cooled by thermal and mechanical effects until it can be broken down into its component parts (low-pressure fractionation). Preferably nitrogen, possibly with the addition of helium, is to be continuously cooled further under the protection of the preferably insulated cold wall and finally stored at the lowest pressures and temperatures until it facilitates the production of electric power by means of generators in the shortest possible time on being re-heated. The temperatures attainable in the cold wall make it likely that primarily the useful properties of superconducting materials can be exploited because, for instance, the viscosity is reduced and it is possible to counter heating through resistances. The useful storage may be extended to other materials.
Abstract:
The invention includes a method of making and using a flowable thermal backfill. The flowable thermal backfill has a low thermal resistivity, useful for filling trenches containing electrical cables and other lines that generate heat. The method includes process steps of blending ingredients of stone, sand and fly ash, making a flowable thermal fill by mixing the blended stone, sand and fly ash with Portland cement and water, and pouring the flowable thermal fill in an excavation containing heat generating lines, immediately after mixing the flowable thermal backfill.
Abstract:
The invention includes a method of making and using a flowable thermal backfill. The flowable thermal backfill has a low thermal resistivity, useful for filling trenches containing electrical cables and other lines that generate heat. The method includes process steps of blending ingredients of stone, sand and fly ash, making a flowable thermal fill by mixing the blended stone, sand and fly ash with Portland cement and water, and pouring the flowable thermal fill in an excavation containing heat generating lines, immediately after mixing the flowable thermal backfill.