A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sinking large-diameter, concrete-lined access shaft -- Harold D. Roberts tunnel, Colorado
Access shaft was construction facility to expedite completion of 23 mi water-diversion tunnel; methods used in sinking vertical 916 ft deep, 16 ft diam shaft below depth of 140 ft were based on Bain system of lining circular shaft with concrete and involved immediate support with nonreinforced concrete lining of each succeeding 20 ft of shaft excavation; shaft excavation equipment.
Sinking large-diameter, concrete-lined access shaft -- Harold D. Roberts tunnel, Colorado
Access shaft was construction facility to expedite completion of 23 mi water-diversion tunnel; methods used in sinking vertical 916 ft deep, 16 ft diam shaft below depth of 140 ft were based on Bain system of lining circular shaft with concrete and involved immediate support with nonreinforced concrete lining of each succeeding 20 ft of shaft excavation; shaft excavation equipment.
Sinking large-diameter, concrete-lined access shaft -- Harold D. Roberts tunnel, Colorado
U S Bur Mines -- Information Cir
Bolmer, R.L. (author)
1961
70 pages
Map, Plate
Report
English
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Methods and costs of sinking circular concrete-lined ventilation shaft
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