波浪作用下新型六角块体固沙效果试验研究

Experimental study on sand fixation effect of new hexagonal block under wave action

采用框格结构固土的生态护岸是护岸工程的新趋势,框格固土能力是生态护岸建设成败的关键一环。介绍多宫格块体这种新型的生态护岸六角块体,并通过室内水槽试验研究块体空腔内部泥沙在波浪作用后的侵蚀深度。试验结果表明:斜坡堤上多宫格块体内部泥沙侵蚀深度符合沿堤从上到下先增后减的规律,同时泥沙侵蚀深度会随波高的增大而增大,斜坡堤不同位置以及单个块体不同部位泥沙侵蚀深度不同,改变块体空腔内填充的泥沙类型会影响侵蚀深度但不影响斜坡堤上侵蚀的整体规律。相比于框格栅栏板,多宫格块体具有更好的固沙效果,可以为植物护岸提供良好的生长环境。

The ecological bank revetment using the sash structure to stabilize the soil is a new trend of bank revetment projects.The ability of the sash to stabilize the soil is a key part of the success of the ecological bank revetment construction.This paper introduces the multi-grid block,a new type of eco-revetment hexagonal block,and studies the erosion depth of the sediment inside the block cavity after wave action through indoor water tank experiments. The test results show that the depth of sediment erosion in the multi-grid block on the slope embankment follows the rule of increasing and then decreasing from top to bottom along the embankment. At the same time,the depth of sediment erosion will increase as the wave height increases. And the depth of sediment erosion in different parts of a single block is different.Changing the type of sediment filled in the block cavity will affect the depth of erosion but not the overall law of erosion on the slope.Compared with the frame grill fence board,the multi-grid block has a better sand-fixing effect,and can provide a good growth environment for plant revetments.