Abstract 959,945. Soil stabilization. CONCH INTERNATIONAL METHANE Ltd. April 18, 1963, No. 15244/63. Heading E1F. To permit of the formation of a frozen zone of soil in the ground freeze pipes 2 are inserted, preferably equidistantly from one another, into the ground along the line of the top of the soil zone to be frozen, the pipes being alternately vertical and at an angle of from 3-30 degrees to the vertical. If the zone encircles an intended excavation the refrigerant inlet to each of those freeze pipes, the bottoms of which are nearest the excavation, is in the external annulus of the freeze pipe and the refrigerant inlet into each of the remaining freeze pipes is into the inner pipe of each of said pipes.
A METHOD FOR CONSTRUCTING A FROZEN WALL FOR AN EXCAVATION IN THE GROUND WHICH COMPRISES INSERTING FREEZE PIPES INTO THE GROUND ALONG THE LINE OF THE TOP OF THE DESIRED WALL, SAID FREEZE PIPES BEING ALTERNATELY VERTICAL AND AT AN ANGLE OF FROM 3* TO 30* TO THE VERTICAL WITH THE TOPS OF SAID FREEZE PIPES BEING CLOSER TOGETHER THAN THE BOTTOMS, AND CIRCULATING A REFRIGERANT THROUGH SAID FREEZE PIPES UNTIL THE FROZEN WALL IS COMPLETE.
Claim 2
Independent Claim
76 words
A METHOD FOR CONSTRUCTING A FROZEN WALL FOR AN EXCAVATION IN THE GROUND WHICH COMPRISES INSERTING FREEZE PIPES INTO THE GROUND ALONG THE LINE OF THE TOP OF THE DESIRED WALL, SAID FREEZE PIPES BEING ALTERNATELY VERTICAL AND AT AN ANGLE OF FROM 3* TO 30* TO THE VERTICAL WITH THE TOPS OF SAID FREEZE PIPES BEING CLOSER TOGETHER THAN THE BOTTOMS, AND CIRCULATING A REFRIGERANT THROUGH SAID FREEZE PIPES UNTIL THE FROZEN WALL IS COMPLETE.