水力插板与抛石斜坡复合堤稳定机理

在海岸防护堤坝工程中,采用水力插板桩技术修筑直立墙,并在墙前水下形成抛石护坡,此种水力插板与抛石斜坡组成的的复合堤,已在工程实践中表现出良好的安全稳定性。对直立堤、抛石堤以及复合堤3种堤型开展不同波况下直立墙上和抛石护坡中波压力的试验研究,对复合堤的稳定性优于直立堤和抛石堤的机理进行分析。试验结果表明,抛石护坡明显降低了直立墙上的波压力,减轻了波浪冲击;直立墙阻止越浪带动抛石堤顶部块体向堤后运动,避免抛石护坡的过度破坏。两者结合使复合堤具有比直立堤和抛石堤更好的稳定性。

Stability mechanisms of hydraulic sliding panel-rubble slope composite breakwater

In coastal protection breakwater engineering,vertical wall is constructed by hydraulic sliding panel technology,and rubble slope is formed underwater in front of the wall.This kind of composite breakwater has shown good safety and stability in engineering practice.Three types of breakwaters (vertical breakwater,rubble-mound breakwater and composite breakwater) are tested under different wave conditions,and the mechanism for the better stability of the composite breakwater comparing with other 2 type breakwaters is studied.The test result shows that the rubble slope reduces the wave pressure on the vertical wall and wave impact significantly;the vertical wall also prevents the rubble mound from moving behind the breakwater and avoids excessive damage of the rubble slope.The combination of them produces better stability comparing with the vertical dike or the rubble slope.