Abstract: Based on analyses of the traditio protection function, groin form selection, lay Practical operation results show that the sheet and can improve the stability of groins. The seawall protection and siltation accretion. nal rockfill groins, the sheet-pile groin is out of groin group, and structure design of -pile groins can reduce beach scour near the sheet-pile groin has been widely applicated presented. The seawall the groin are analyzed. ponds and local scour, to estuarine regulation,