REKAYASA SIPIL
Vol 7, No 2 (2011)

Gerusan Kaki Akibat Gelombang Pecah Pada Struktur Impermeable Sloping Wall

Dalrino, Dalrino ( Jurusan Teknik Sipil Politeknik Negeri Padang )
Yurisman, Yurisman ( Jurusan Teknik Sipil Politeknik Negeri Padang )
Syofyan, Elvi Roza ( Jurusan Teknik Sipil Politeknik Negeri Padang )



Article Info

Publish Date
20 Mar 2012

Abstract

Toe scour is one of phenomenon that frequently experienced by coastal structures and was realized as the causative factor to structure failure. When the structure was placed at coastal environment, existence of that structure will affecting flow pattern at area, one of them is the breaking wave event at around toe area. When breaking wave happened, energy dissipation caused by breaking process compensated in the form of vortex and improvement of flow intensity that have ability to moving bed material from its origin position of rest around the toe. This Research was focused for the breaking wave condition that producing local scouring at toe structure. Testing variable consists of wave height (H ), wave period (T) and water depth at toe (ds). The characteristic of structure was impermeable sloping wall. Physical Modeling was conducted at wave flume with 40 m length, 0.6 m width and 1.1 m height in Balai Hidraulika and Geoteknik Keairan (BHGK) PUSAIR, Bandung. Analysis of the result showed that improvement of toe scour was affected by breaking wave improvement, bed agitation caused by breaking process, down rush flow velocity, decreasing of water depth at toe and increasing of wave length

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