摘要
基于典型的冲刷坑形态,通过改变冲刷深度,对单桩、五桩和九桩进行了冲刷前、后波浪力试验,研究了波浪荷载的变化规律。根据试验数据,对Morison公式的速度力系数和惯性力系数进行修正。结果表明,随着冲刷深度增大,桩基础所受波浪荷载总体呈减小趋势。同一冲刷深度条件下,桩基础所受波浪荷载随着水深增大而变小。JTS 145—2015《港口与航道水文规范》中速度力系数和惯性力系数取值相对保守,规范计算得出的速度力和惯性力约为实验室实测值的2.7倍和2.1倍。
Based on the typical shape of scour hole, we analyzed the change law of wave load by the experiment of the single pile, five piles and nine piles before and after scouring via to changing the scour depth. According to the experiment data, we corrected the drag force coefficient and inertia force coefficient of Morison formula. The result shows that the wave load of pile foundation is decreased with the increase of the scour depth. Under the condition of the same scour depth, the wave load of the pile foundation is decreased with the increase of water depth. It is relatively conservative of the drag force coefficient and inertia force coefficient in JTS 145-2015 Code of hydrology for harbour and waterway. The drag force and inertia force calculated by rules is 2.7 and 2.1 times than the forces measured by experiment.
作者
仇正中
刘建波
代浩
QIU Zheng-zhong;LIU Jian-bo;DAI Hao(CCCC Second Harbor Engineering Co., Ltd, Wuhan, Hubei 430040, China;School of Civil Engineering, Southeast University, Nanjing, Jiangsu 210000, China)
出处
《中国港湾建设》
2017年第2期48-52,共5页
China Harbour Engineering
基金
交通运输部应用基础研究项目(2013319759060)
关键词
桩基础
物理模型试验
波浪荷载
速度力系数
惯性力系数
pile foundation
physical model experiment
wave load
drag force coefficient
inertia force coefficient
