Wave absorbing device

Abstract

Provided is a wave absorbing device comprising one or more wave absorbing bodies having an inflow side face formed by removing part of a cylindrical body along the longitudinal direction and a C-shaped cross section, to be installed underwater in a relatively shallow shore with the inflow side face being oriented against the wave progress direction and inclined with respect to the wave progress direction. A longer wave absorbing and a number of shorter wave absorbing bodies are disposed in a straight line, the adjacent opening ends being opposed in proximity to each other with a gap being held therebetween.

1 . A wave absorbing device comprising:
 one or more wave absorbing bodies having an inflow side face formed by removing a part of a cylindrical body along a longitudinal direction and a C-shaped cross section, to be installed underwater in a relatively shallow shore with the inflow side face being oriented against a wave progress direction and inclined with respect to the wave progress direction;   wherein a body of the one or more wave absorbing bodies being available as at least one of a longer wave absorbing body a shorter wave absorbing body, the longer wave absorbing body being provided with a plurality of oblong relief holes formed at one or more appropriate intervals;   wherein on a plurality of shorter wave absorbing bodies being used, the respective shorter wave absorbing bodies being disposed in a straight line, one or more adjacent opening ends being opposed in proximity to each other with a gap being held therebetween;   wherein a wave hitting at least one of an offing side end of the longer wave absorbing body and an offing side end of a row of the shorter wave absorbing bodies creates a flow in at least one of an inside of the longer wave absorbing body and an inside of the row of the shorter wave absorbing bodies by a water flow pressure difference caused between the inside of the offing side end of the longer wave absorbing body and the inside of a land side end thereof, or between the inside of the offing side end of the row of the shorter wave absorbing bodies and the inside of the land side end of thereof.   
     
     
         2 . The wave absorbing device according to  claim 1 , wherein a sub-wave absorbing body having a same geometry as that of the wave absorbing body, and the same diameter as or a smaller diameter than that of the wave absorbing body is connected onto at least one of a top and a bottom of the wave absorbing body with an appropriate gap being provided. 
     
     
         3 . The wave absorbing device of  claim 1 , wherein the wave absorbing body has a plurality of fixing piles, being fixed in the sea by means of the plurality of fixing piles. 
     
     
         4 . The wave absorbing device according to  claim 3 , wherein each of the plurality of fixing piles is mounted to the wave absorbing body by means of a fixing pile mounting portion installed at a rear face of the wave absorbing body.