緩傾斜護岸では，高波浪時において護岸背後の道路で通行障害が発生することがある．本研究では，まず現地調査を行って，越波による車両の危険性を明らかにした．水理模型実験では，3種類の周期条件に対して波高を変化させて，(1)海側車線部における最大越波水脈厚，(2)越波流量，(3)車両に働く水平波力，の特性を明らかにした．また，最も周期の長い条件に対して，最大越波水脈厚の空間分布を示した．さらに，最大越波水脈厚を指標として，車両に働く波圧分布を定式化するとともに，車両滑動実験によりその妥当性を確認した．
Traffic hindrances were often caused by overtopping waves under storm wave conditions on coastal roads behind gently sloping seawalls. In this study, the damage risk of vehicles due to wave overtopping was revealed by the field observation data. Based on the results of hydraulic model experiments with irregular waves, the characteristics of wave overtopping water thickness, wave overtopping rate and the horizontal wave force on the vehicle were disclosed for three wave period conditions at the sea side road section. The relationship between maximum wave overtopping thickness and offshore wave height was shown for wave period conditions. In order to examine the stability of vehicles for the longest wave period condition, the wave pressure distribution was formulated as a function of the wave overtopping thickness on the road. The validity of the calculation formula was also confirmed by the sliding experiment of vehicles.
地球規模の海面水温の変動を考慮したインドネシアの河川水位の長期予測
JSCE_72_4_I1_I6
(962.13KB)
