Abstract
A sand layer has been usually laid on rock sheds as shock absorbing material against a falling rock. However, recently new shock absorbing materials have been expected against a big impulsive force. This time, the shock absorbing behavior of the expanded polystyrol against a falling rock is experimentally investigated.
Experiments have been carried out for the following four types of arrangement.
(1) Expanded polystyrol blocks only.
(2) Alternate layers of sand and expanded polystyrol blocks. (3) Sand layer only.
(4) Protection methods of the surface.
From the experimental results, the formula for the impulsive design load are proposed when the expanded polystyrol is laid on the rock sheds against a falling rock.
