Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Tunnels - Machine Excavation Rate of Progress Machine Data
Information on 7 machine-bored water tunnels constructed by the Bureau of Reclamation is presented graphically and pictorially. Machine data, rates of progress, tunnel profiles, and rock types and strengths are given for each tunnel. The bored diameters of these tunnels vary from 9 to 20 ft. Rocks encountered in boring were: shale, sandstone, siltstone, rhyolite, and rhyodacite. The compressive strengths of these rocks were 1,400 to 17,000 psi. The boring rates of the machines used varied from 37 to 107 ft for the average calendar day. The maximum progress was 403 ft in one 3-shift day. This rate was attained in 17.3 hr of machine time while boring an 8 ft, 7 in. finished diameter tunnel through shale having a maximum compressive strength of 6,000 psi. Contract and miscellaneous data are also given for each of the tunnels. (Author)
Tunnels - Machine Excavation Rate of Progress Machine Data
Information on 7 machine-bored water tunnels constructed by the Bureau of Reclamation is presented graphically and pictorially. Machine data, rates of progress, tunnel profiles, and rock types and strengths are given for each tunnel. The bored diameters of these tunnels vary from 9 to 20 ft. Rocks encountered in boring were: shale, sandstone, siltstone, rhyolite, and rhyodacite. The compressive strengths of these rocks were 1,400 to 17,000 psi. The boring rates of the machines used varied from 37 to 107 ft for the average calendar day. The maximum progress was 403 ft in one 3-shift day. This rate was attained in 17.3 hr of machine time while boring an 8 ft, 7 in. finished diameter tunnel through shale having a maximum compressive strength of 6,000 psi. Contract and miscellaneous data are also given for each of the tunnels. (Author)
Tunnels - Machine Excavation Rate of Progress Machine Data
1972
17 pages
Report
Keine Angabe
Englisch
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