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桩柱是广泛用于桥梁、码头等涉水建筑物的一种结构。滑坡产生的涌浪作用在桩柱的冲击力对整个涉水建筑物的稳定性及安全性有重要影响。通过物理模型试验,研究滑坡涌浪作用下,桩柱所受冲击力的特征。结合相关数据,提出滑坡涌浪作用下桩柱处动水压强极值的计算公式。试验结果表明,体积涌浪传播至桩柱时,对桩柱产生最大动水压强的极值沿桩柱轴向等值分布,与孤立波对桩柱作用力分布规律类似;而后冲击涌浪产生第二极值,其分布随水深而递减,规律与规则波类似。
Piles are widely used in bridges, wharves and other wading structures. The surge effect caused by the landslide has an important impact on the stability and safety of the entire wading building. Through the physical model test, the characteristics of the impact force of piles under the action of landslide surge are studied. Combining with the related data, the calculation formula of the extreme value of hydraulic pressure at the piles under the action of landslide surge is proposed. The experimental results show that when the bulk surge propagates to the pile, the extreme value of the maximum hydrodynamic pressure on the pile is equal to the axial distribution along the pile, which is similar to the law of force distribution of the isolated wave on the pile. The second extreme value, its distribution decreases with the depth of water, the law is similar to the regular wave.