Utforming av bergtunnlar. Etapp 9
Publish date: 2002-01-01
Report number: FOI-R--0421--SE
Written in: Swedish
In order to study the propagation of blast wave in tunnel systems, a project started 1995 with tests in full scale and model scale. The full-scale test has been performed in a rock tunnel at the shooting range in Älvdalen. In this phase (9) the effect of different sizes of holes(>1 m2) in a barrier were studied. The objective of this study was to verify that protection for certain equipment can be achieved behind a barrier not completely closed. The pressures were monitored in the whole tunnel system but the emphasis was on the effects behind the barrier. In this phase, only full-scale tests were performed. A charge of 125 or 625 kg of ANFO were detonated at different distances from the barrier. When the hole is 1 m2 the pressure starts to build up more slowly behind the barrier.