Sewerage and Drainage # 1979 Brigthon
The main concern over the behaviour of buried plastics pipes is the occurrence of deflection. Theories are useless if not checked by field measurements to remove uncertainties, Over the last 15 years. 25 km of pipeline in 600 different sections have been measured in 5 West-European countries in quite different circum- stances. Conclusions can be drawn on how to lay pipes and how to avoid difficulties. Of course the critical aspect of the field measurements is the long-term behaviour of the pipes.