混凝土铰链排护坡式海堤排体稳定性试验研究

摘要

通过波浪断面物理模型试验,对混凝土铰链排护坡式海堤排体在不同水深、波高、波周期、波浪类型及压载块体间距等条件下的稳定性展开研究,揭示了排体不同部位的失稳特点.试验结果表明:当水深一定时,波高或波周期越大,排体稳定性越差;不规则波作用对排体稳定性的影响显著大于规则波作用;排体失稳主要发生在首尾边缘部分,而内部稳定性较好,当排体采用首尾边缘压载块体厚度大、内部压载块体厚度小的结构形式时,仍具有良好的稳定效果;压载块体间距对排体稳定性、抗冲、变形和保护岸滩能力及垫层碎石质量的选取均具有一定影响,在实际工程中应综合考虑各因素合理确定.%Through wave section physical model experiment,the stability of the mattress of seawall with hinged concrete slab mattress revetment is studied under different conditions such as water depth,wave height,wave period,wave type and ballast block's space.The characteristics of instability for different parts of mattress are revealed.The experiment results show that the stability of mattress is worse under the circumstance that wave height is higher or wave period is longer when the water depth is the same.The impact action of irregular wave on the stability of mattress is significantly more than action of regular wave.The instability of mattress occurs mainly in the edge of head and tail part,and the stability of internal part is better.The mattress still has good stability when it uses the structural type that the edge of head and tail ballast block with large thickness and the internal ballast block with small thickness.Ballast block's space should be determined rationally with consideration of all factors in actual engineering because it will influence the stability and the ability of abrasion-resistance,deformation and beach protection of mattress and the selection of gravel cushion.