Einsatz der Beobachtungsmethode zur Optimierung von Tunneldraenagesystemen

摘要

The reduction of water pressure with the help of drainages is a common and in some cases also indispensable means to carry out tunnels in high ground water levels reliable. Within the last few years it turned out that the cost-intensive maintenance of drainages because of scale deposits is to be seen as a disadvantage of draind tunnels in comparison with seald tunnels. But earlier examinations have shown that the basic concept of the drained tunnel is the best solution also with consideration of a high maintenance caused by scale deposits in many areas of application. One of the main problems is the fact that until today no uniform, systematic and scientifically safeguarded procedure exits which deals with planning, carrying out and operation of tunnel drainage systems. This procedure would make it for all its users possible to construct future drainage systems in a way that helps you to carry them out reliable and to use them with low maintenance. With the help of the observational method this gap can be closed. On the basis of theoretical examinations, analyses, testresults and experiences gathered in practice, recommendations for the use of the observational method for the optimisation of tunnel drainage systems are given here.