The Stability Riprap on Scattered Submerged Breakwater due to Physical Model

J. Ocean Eng. Technol. 2010;24(1):106-115.

Park Sang-Kil,Kim Woo-Saeng,Lee Jae-Sung,Kim Sung-Hun

Department of Civil Engineering Pusan National University,Department of Civil Engineering Pusan National University,Department of Civil Engineering Pusan National University,Department of Civil Engineering Pusan National University

난적잠제 상부 사석의 안정에 관한 실험적 연구

박상길,김우생,이재성,김성훈

부산대학교 사회환경시스템공학부,부산대학교 사회환경시스템공학부,부산대학교 사회환경시스템공학부,부산대학교 사회환경시스템공학부

Keywords: Artificial intertidal zone, Scattered riprap submerged breakwater, Wave breakers type, Riprap of stability, Calculating the weight of riprap

핵심용어: 인공조간대, 난적 잠제, 쇄파형상, 사석안정, 사석중량산정

Abstract

This study described the stability of riprap, which was examined by a two-dimensional physical model of a scattered riprap submarine breakwater. Artificial reef structures made of scattered riprap are used like artificial intertidal zone structures as waterfront seaside structures. To prevent topography change in such an artificial intertidal zone the energy is reduced at the scattered riprap submarine breakwater by intercepting high waves. The breaking waves are converted into flow on the front surface slope of the submarine breakwater, which follows the upper part of the artificial intertidal zone. Because of this phenomenon of resisting water flow, it is very important to calculate the required weight of the riprap to maintain its stability. The results of a physical model can be abstracted as shown below. First, distribute the wave breaking types occurring on the front surface slope of the submarine breakwater and arrange it in relation to the movement of riprap. Second, using the hydraulic phenomenon that occurs at the depth of the scattered riprap submarine breakwater, propose a calculation formula for the velocity distribution showing the influence on the stability of the riprap. Third, propose and compare values, which can be obtained by experiments and calculations for riprap stability on the front surface of the artificial intertidal zone. Fourth, calculate the required weight for riprap stability.