Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation and Analysis of Canal Test Section and Siphon Areas Towaoc Canal Reach 2, Colorado
Prompted by documented hydro compaction settlement of 3 to 4 feet in areas of an irrigated 100-acre agricultural plot on the Ute Mountain Tribal Reservation (Rippon, 1964), the Bureau of Reclamation initiated an extensive geotechnical investigation to determine the depth and aerial extent of collapsible alluvial soils and their effect on the design of Reach 2 of Towaoc Canal and appurtenant structures. The geotechnical investigation of Towaoc Canal soil collapse susceptibility was conducted in two phases. The purposes of phase I were to: (1) Qualitatively evaluate the collapse susceptibility of surficial materials of the Towaoc, Colorado, area, particularly in the vicinity of the proposed Towaoc Canal alignment. Seven qualitative methods based on physical properties tests were evaluated to determine which were the most reliable and simplest to use for identification of collapse susceptibility; (2) Quantitatively evaluate collapse settlement from representative undisturbed samples using methods proposed by Jennings and Knight (1956-1957); (3) Compare and correlate qualitative and quantitative results; (4) Correlate laboratory test results with actual in situ collapse settlement (hydro compaction). Purposes of the phase II study were to: (1) Conduct a full-scale field investigation of an instrumented canal section and embankment, to enable comparison of measured settlement with predictions based on laboratory tests of undisturbed samples. These data could be used to indicate whether other sections (particularly fill sections) along Towaoc Canal Reach 2 should be pretreated; (2) Qualitatively determine the collapse susceptibility based on physical properties tests; (3) Estimate the amount of potential collapse at siphon structure sites based on analysis of odometer test results of undisturbed samples; (4) Recommend the most effective and economical method(s) of siphon-site pretreatment.
Investigation and Analysis of Canal Test Section and Siphon Areas Towaoc Canal Reach 2, Colorado
Prompted by documented hydro compaction settlement of 3 to 4 feet in areas of an irrigated 100-acre agricultural plot on the Ute Mountain Tribal Reservation (Rippon, 1964), the Bureau of Reclamation initiated an extensive geotechnical investigation to determine the depth and aerial extent of collapsible alluvial soils and their effect on the design of Reach 2 of Towaoc Canal and appurtenant structures. The geotechnical investigation of Towaoc Canal soil collapse susceptibility was conducted in two phases. The purposes of phase I were to: (1) Qualitatively evaluate the collapse susceptibility of surficial materials of the Towaoc, Colorado, area, particularly in the vicinity of the proposed Towaoc Canal alignment. Seven qualitative methods based on physical properties tests were evaluated to determine which were the most reliable and simplest to use for identification of collapse susceptibility; (2) Quantitatively evaluate collapse settlement from representative undisturbed samples using methods proposed by Jennings and Knight (1956-1957); (3) Compare and correlate qualitative and quantitative results; (4) Correlate laboratory test results with actual in situ collapse settlement (hydro compaction). Purposes of the phase II study were to: (1) Conduct a full-scale field investigation of an instrumented canal section and embankment, to enable comparison of measured settlement with predictions based on laboratory tests of undisturbed samples. These data could be used to indicate whether other sections (particularly fill sections) along Towaoc Canal Reach 2 should be pretreated; (2) Qualitatively determine the collapse susceptibility based on physical properties tests; (3) Estimate the amount of potential collapse at siphon structure sites based on analysis of odometer test results of undisturbed samples; (4) Recommend the most effective and economical method(s) of siphon-site pretreatment.
Investigation and Analysis of Canal Test Section and Siphon Areas Towaoc Canal Reach 2, Colorado
R. Luehring (Autor:in)
1990
202 pages
Report
Keine Angabe
Englisch
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