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AbstractAbstract
[en] An estimate on what influence a glaciation has on the bedrock at larger depths can in some degree be based on geological examples. A more obvious picture can be produced by applying elasticity and plasticity theories. The geological examples indicate that there are two effects of a glaciation which are of interest in the actual relation: partly shear stresses caused by tangential forces when the ice moves over the bedrock, partly increased stresses caused by the weight of the ice. The largest influence from the tangential shear forces on the bedrock will be attained at or near the front of an advancing mass of ice. A conclusion is that these is no possibility for an advancing glacier to break up and create openings of more than a few meters depth in a bedrock of the quality that will be chosen for the disposal. The depository can not be opened and exposed by the ice movements. The pressure from the ice on the land-surface will be of the order 30MPa. At a depth of 500 m the vertical stress will increase from 13 to 43MPa. The horizontal stresses will increase with about 15MPa
Original Title
Inverkan av glaciation paa en deponeringsanlaeggning belaegen i urberg 500 m under markytan
Primary Subject
Source
Mar 1978; 23 p
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Report
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