斜坡基床上防浪结构设计探讨

直立式防波堤承受波峰推力一般是波谷吸力的1.3～1.6倍,斜坡式防波堤和护岸顶部的防浪墙,波峰作用力是结构的控制荷载,波谷时基本不受波吸力作用,结构承受的控制水平力具有方向性。提出防浪块体设置在斜坡基床上的方案,利用斜坡方向的自重力分力克服部分波峰水平力,实现防浪结构在波峰、波谷作用下的稳定性基本处于同一水平。通过结构受力特点和施工可行性分析,初步认为在防浪结构的稳定性由基床顶面抗滑控制的情况下,该方案结构受力合理,具有可实施性和应用价值。

Design method of wave-protection structure on rubble mound base

Horizontal wave loadings of breakwater with vertical face exerted by wave crests are usually 1.3-1.6 times of those by wave troughs.The design loadings for the crest structure on the top of the rubble mound breakwater or shore-protection structure are usually induced by action of wave crests rather than the wave suction of wave troughs,which implies that the horizontal wave loads exerting on the structures have obvious orientation.A method of installing the armour blocks on the rubble mound base is proposed to balance the horizontal wave loads by the gravity components of the armour blocks along the slope and to gain a consistent stability in the two modes of wave actions by wave crest and by wave trough,respectively.Through an analysis on the loading status and feasibility of construction,it is believed that in case that the stability of the crest structure is governed by sliding along the top face of the rubble mound base,such a designed structure is reasonable in terms of its loading status,possible to be implemented and has values of application.