摘要
Rock-fill dykes are often damaged caused by rapid flow currents in a mountainriver. Based on the relationship between the rock size on cover layer and its incipient velocity,it is found that rock weight is directly proportional to the 6th-9th power of incipient velocity,and 50% increase of the velocity may result in about 40 times increase of the rock weight.Therefore, it is inappropriate to improve the stability of rock-fill dykes by simply increasing therock weight. Some new measures should be used to reach this purpose.
Rock-fill dykes are often damaged caused by rapid flow currents in a mountainriver. Based on the relationship between the rock size on cover layer and its incipient velocity,it is found that rock weight is directly proportional to the 6th-9th power of incipient velocity,and 50% increase of the velocity may result in about 40 times increase of the rock weight.Therefore, it is inappropriate to improve the stability of rock-fill dykes by simply increasing therock weight. Some new measures should be used to reach this purpose.
基金
ThisworkwasfinanciallysupportedbyResearchProjectofTransportationInfrastuctureinWestChina (2 0 0 1 318 2 2 4 6 8),MinistryofCommunication
China .
