... ABSTRACT In very shallow areas, the possibility that coastal dikes and seawalls is destroyed by waves smaller than the design wave is high. Many field cases indicated that the main reasons of the failures of the structures were the scour in the front of the structures and the sand outflow from...

... buildings for refuges are about 100 years, the life of soil refuge mounds are about 500 years. However, in the case of soil mounds, countermeasures to destruction by scour are required. banking road water depth bed load coefficient uniformity coefficient median grain size coastal dike mound...

... ABSTRACT Coastal dikes may be destroyed or suffer serious inundation damage from high waves that exceed their design scale. This indicates there should be functions for mitigating damages from unexpectedly high waves. This research addresses this need through model experiments, focused...

... ABSTRACT The main purpose of this study is to investigate the characteristics of wave force reduction by the coastal dike and the bottom roughness through hydraulic model experiments applying Froude similarity's law with the scale of 1 to 100. It was clarified that tsunami wave force...

... ABSTRACT After the 2011 off the Pacific coast of Tohoku Earthquake Tsunami, coastal dikes in Japan are required to be improved their tenacity. It is reported that scours of coastal dikes caused by tsunami overflow mainly occurred at the toe of the landward slope. In this study, fixed- bed...

... ABSTRACT An earthquake occurred off the Pacific coast of Tohoku on 11 March 2011, which triggered massive tsunami waves of 10 m or more. The tsunami caused severe damage to coastal structures, such as coastal dikes and seawalls. It has been reported that one of the causes of the failure...

... Abstract There are many cases in which coastal dike or seawalls are broken by waves lower in height than the design height. And, they don't usually received waves of great power, because they are constructed on very shallow coasts or sand beaches. 0The causes of the destruction are erosion...

... Abstract Evidence shows that coastal dikes and seawalls could be damaged or destroyed by coastal scours and the suction of backfilling materials. As the impacts of coastal erosion and global warming become severer, it is necessary to be able to predict the suction rate of backfilling materials...

... Abstract In a beach or a shallow area, there are a few cases that coastal dikes were destroyed directly by strong wave force. On the other hand, a lot of field cases show that scour and suction caused by the continuing action of waves bring their destruction gradually. Therefore...

... ABSTRACT Coastal dikes and seawalls in shallow areas are vulnerable to scour and suction forces of big waves. In a few cases of these structures in a beach or shallow area, they have been destroyed directly by strong wave forces. A lot of field cases also show that scour and suction caused...

... Field Survey of Cracks Occurred on Aged Concrete-Armored Coastal Dikes Yoshiharu Yoshida, Koichiro Iwata Department of Civil Engineering, College of Engineering, Chubu University Kasugai, Aichi, Japan and Yuko Yamauchi Yamauchi Construction Company Tahara, Aichi, Japan ABSTRACT The purpose...

... ABSTRACT Past experience has shown that by far the most widespread source of earthquake-induced damage to coastal dikes and embankments has been liquefaction of loose, saturated, sandy foundation soils that often prevail throughout the marine environment. In this paper, the potential of using...