Druckschachtpanzerungen - Überbrückung eines Einzelrisses im Felsmantel

In a former paper of the authors a concept for dimensioning pressure shafts, considering the passive resistance of rock-mass, has been developed. The assumption made there was that many cracks are distributed evenly over the circumference. The width of a single fissure was estimated by a reduction factor on the cumulated width of cracks. This question was now investigated analytically on basis of common mechanical principles and was confirmed by FE calculations. On hand of examples a dimensioning concept for bridging a single fissure by the steel lining has been developed. In the annex questions frequently arising over the planning process are discussed. It is intended to facilitate an overall judgement of the individual system by better knowledge of the complex relations