A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic tunneling in St. Peter Sandstone at Minneapolis, Minn
Cutting sandstone by streams of water under pressure from nozzles and pumping resulting sand to surface has reduced cost of storm sewer construction in use since 1934; tunnel driven 6000 ft at grade of 1 ft per thousand; sand pumps are rubber lined, designed to work against head of 100 ft; either 4-in. or 6-in. diam suction and discharge openings.
Hydraulic tunneling in St. Peter Sandstone at Minneapolis, Minn
Cutting sandstone by streams of water under pressure from nozzles and pumping resulting sand to surface has reduced cost of storm sewer construction in use since 1934; tunnel driven 6000 ft at grade of 1 ft per thousand; sand pumps are rubber lined, designed to work against head of 100 ft; either 4-in. or 6-in. diam suction and discharge openings.
Hydraulic tunneling in St. Peter Sandstone at Minneapolis, Minn
U S Bur Mines -- Information Cir
Lewis, W.E. (author)
1950
12 pages
7 Supp plates
Report
English
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