大水深斜坡堤护面块体稳定重量的确定

近年来,军队和地方港口建设中,在一些水深达20 m的水域,选择了造价相对较高、但安全性和耐久性较好的斜坡式结构防波堤。但在确定护面块体稳定重量时却发现,按照相关规范计算的重量值偏小,不能满足安全性的要求。结合某船厂防波堤的断面物模试验,对大水深的斜坡堤护面块体的稳定性进行了初步分析,发现在该试验中块体的临界重量为8.15 t。并提出在计算块体稳定重量时应考虑水深的影响,适当降低块体稳定系数的取值。

Determination of Stable Weight of Armour Blocks for a Deep-water Inclined Breakwater

In recent years,some inclined breakwater with higher construction cost but better safety and durability have been built in sea areas with water depth up to 20 m.It is shown that the stable weight of armour blocks calculated based on the relevant code is on the light side and can't meet the requirement of safety.In this paper,a preliminary analysis of stability of armour blocks for a deep-water inclined breakwater is made in combination with the physical model test for a shipyard's breakwater.It is shown from the test results that the critical weight of armour blocks is 8.15 tons,and it is suggested that the effects of water depth should be taken into consideration in calculating the stable weight of armour blocks,and the selected stability coefficient for amour blocks can be adequately reduced.