Download or read book Pressures of Thermal Origin Exerted by Ice Sheets Upon Hydraulic Structures written by M. Drouin and published by . This book was released on 1974 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice expands or contracts as a function of temperature variation. Thus, partial or total restriction of the expansion of a sheet of ice gives rise to conditions of stress which the engineer must consider in analyzing the stability of hydraulic structures subjected to them. Each site at which a hydraulic structure is installed has its own particular characteristics; the principal ones are the following: meteorological conditions, texture and structure of the ice, topography of banks, thickness of the ice, thickness and density of the snow covering the ice, and cracks in the ice sheet. The objective of this research was to study pressures of thermal origin exerted by ice sheets as a function of these parameters. Variations in air temperature are also the cause of the formation of ice ramparts and pressure crests. Ramparts are formed at the peripheries of lakes whose shores offer little resistance to the free expansion of ice sheets. At present, Canadian engineers are using values from 15,000 to 30,000 kg per linear meter (10,000 to 20,000 lbs per linear foot) in their calculations. A thrust equal to 22,500 kg per linear meter (15,000 lbs per linear foot) has the same capability of overturning a concrete gravity dam 12.5 meters (38 feet) high as the thrust exerted by the water. An Additional volume of concrete, on the order of 30 percent, is necessary to assure the stability of such a structure subjected to this thrust exerted by the ice. These values indeed point up the importance of more precisely determining the intensity of this force as a function of the numerous variables found in nature.
Download or read book Pressures of Thermal Origin Exerted by Ice Sheets Upon Hydraulic Structures Les Poussees D Origine Thermique Exercees Par Les Couverts de Glace Sur Les Structures Hydrauliques written by M. Drouin and published by . This book was released on 1974 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice expands or contracts as a function of temperature variation. Thus, partial or total restriction of the expansion of a sheet of ice gives rise to conditions of stress which the engineer must consider in analyzing the stability of hydraulic structures subjected to them. Each site at which a hydraulic structure is installed has its own particular characteristics; the principal ones are the following: meteorological conditions, texture and structure of the ice, topography of banks, thickness of the ice, thickness and density of the snow covering the ice, and cracks in the ice sheet. The objective of this research was to study pressures of thermal origin exerted by ice sheets as a function of these parameters. Variations in air temperature are also the cause of the formation of ice ramparts and pressure crests. Ramparts are formed at the peripheries of lakes whose shores offer little resistance to the free expansion of ice sheets. At present, Canadian engineers are using values from 15,000 to 30,000 kg per linear meter (10,000 to 20,000 lbs per linear foot) in their calculations. A thrust equal to 22,500 kg per linear meter (15,000 lbs per linear foot) has the same capability of overturning a concrete gravity dam 12.5 meters (38 feet) high as the thrust exerted by the water. An Additional volume of concrete, on the order of 30 percent, is necessary to assure the stability of such a structure subjected to this thrust exerted by the ice. These values indeed point up the importance of more precisely determining the intensity of this force as a function of the numerous variables found in nature.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River and Lake Ice Engineering written by George D. Ashton and published by Water Resources Publication. This book was released on 1986 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water resources Investigations written by and published by . This book was released on 1977 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Report Corps of Engineers U S Army Cold Regions Research and Engineering Laboratory written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1972 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CRREL Technical Publications 1950 1975 written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Engineering Guide for Design and Construction of Small Craft Harbors written by C. Allen Wortley and published by . This book was released on 1978 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cold Region Structural Engineering written by Esa M. Eranti and published by . This book was released on 1986 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highlights newest design and construction techniques giving guidance on such topics as ice forces on structures, snow and icing problems, earthworks and foundation construction in permafrost, special design considerations for seasonal frost areas, moisture and condensation control, protection of underground utility lines, and construction during winter in arctic and subarctic regions.
Download or read book POAC 79 written by and published by . This book was released on 1979 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Engineering for Rivers and Lakes Bibliography written by C. Allen Wortley and published by . This book was released on 1987 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States 1970 written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1970 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States and Canada written by and published by . This book was released on 1972 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Marine Environment and Structural Design written by John Gaythwaite and published by . This book was released on 1981 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Ice Pressures on Dams written by and published by . This book was released on 1991 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rising temperatures can cause the thermal expansion of an ice sheet covering a reservoir and exert significant pressure on hydraulic structures such as dams. Since the design method currently used for dams fails to consider the complexity of the problem, empirical and theoretical methods were developed to predict ice pressure. This reports looks at some of the methods of predicting ice pressures and applies them to dams in the Sudbury, North Bay, and Muskoka areas.
