A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic Transportation and Solids Separation of Excavated Materials in Tunnels
The purpose of this report is to provide a detailed account of the techniques employed in constructing tunnels, i.e., transit guideways, within the St. Peter sandstone by hydraulic means. The St. Peter is a unique, well compacted layer of granular material which can be excavated with relative ease (soft ground techniques) yet behaves similar to a moderately competent hard rock surrounding an opening. This hydraulic method has resulted in tunneling costs substantially below the national average for soft rock, and may provide a basis for reducing cost of tunnel construction in similar materials. Important in hydraulic methods is a tremendous consumption of water. Solutions for the disposal of this water have been to effect a coarse separation and dispose of the fines bearing effluent in the environment. Environmental concerns prohibit this type of pollutant, therefore alternate proposals for the disposal of the contaminant effluent must be developed. Several possibilities are suggested within the text and methods are discussed which will satisfy conditions imposed by each alternative.
Hydraulic Transportation and Solids Separation of Excavated Materials in Tunnels
The purpose of this report is to provide a detailed account of the techniques employed in constructing tunnels, i.e., transit guideways, within the St. Peter sandstone by hydraulic means. The St. Peter is a unique, well compacted layer of granular material which can be excavated with relative ease (soft ground techniques) yet behaves similar to a moderately competent hard rock surrounding an opening. This hydraulic method has resulted in tunneling costs substantially below the national average for soft rock, and may provide a basis for reducing cost of tunnel construction in similar materials. Important in hydraulic methods is a tremendous consumption of water. Solutions for the disposal of this water have been to effect a coarse separation and dispose of the fines bearing effluent in the environment. Environmental concerns prohibit this type of pollutant, therefore alternate proposals for the disposal of the contaminant effluent must be developed. Several possibilities are suggested within the text and methods are discussed which will satisfy conditions imposed by each alternative.
Hydraulic Transportation and Solids Separation of Excavated Materials in Tunnels
C. R. Nelson (author) / D. H. Yardley (author) / R. J. Havrilak (author) / S. M. Miller (author)
1975
178 pages
Report
No indication
English
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