Abstract
A survey of the design method of preventive structures against rock falls and an improved design procedure are presented.
At first, a current investigative procedure of slopes before the design of preventive structures is outlined and a present design method is generally remarks. Secondly, a motion of falling rocks and an estimation of falling speed and location of rocks are described.
Thirdly, many formula estimating impact design load derived from the elastic contact theory, the elastic or visco-elastic and plastic theory and experimental results are discussed.
Finally, a rational design procedure is proposed.
