Markens betydelse för vägräckens funktion: FUD RT Vägkroppens betydelse för vägutrustningars funktion

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Background; Trafikverket (the Swedish Transport Administration) was asking for enhanced information about interaction between soil grading, bearing capacity and type approved vehicle restraints systems.

Purpose: To get enhanced knowledge about interaction between soil grading, bearing capacity and type approved vehicle restraints systems.

Method: Dynamic testing with an impact sled, some static push/pull tests and finally some full-scale crash testing with a passenger car into a barrier.

Results: Barrier posts should not have a shorter length below ground level than 1.0 meter. A slope shoulder behind a barrier installation should not be arranged closer than 0.6 meter behind the same. In soil with less bearing capacity or compact ability it is probably possible to enhance barrier functionality by using even longer barrier posts, with a larger proportion of the post being inserted into ground.

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