Abstract
This paper describes the impulsive force and the rate of check of drifting woods at the stockade, as the second stage of a series of study on the check. In the former, the authors derive theoretically the expression relating to the value of p corresponding to the impulsive force and set up the safety section of the pier by expanding it. In the latter, the authors research experimentally on the effect of check of the stockade and make clear the mechanism of initial check of drifting woods and the relations between the rate of check and some relating factors.
