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为研究海洋桥梁施工围堰在波浪作用下波浪压力的分布规律,通过现场实测及数值模拟的方法,对海洋桥梁施工过程中使用的大尺度钢围堰表面波浪压力进行了研究.基于三维绕射理论,使用代表波法,对实测有效波高进行规则波模拟,确定了波压力峰值沿围堰表面的分布规律以及随水深的变化规律,并对围堰表面的波浪动压力峰值进行了分析,并与实测值进行了对比.结果表明:三维绕射理论能合理地模拟围堰表面波压力分布;在绕射效应的影响下,波浪总压力、波浪动压力均呈现出迎浪侧大、背浪侧小的特点,波浪动压最大增幅可达125%;实测总压力随水深增加而增加,波浪动压力峰值随水深增加而减小.
In order to study the distribution of wave pressure of cofferdam in marine bridge construction under wave, the surface wave pressure of large-scale steel cofferdam used in the construction of marine bridge was studied by on-the-spot measurement and numerical simulation method.Based on three-dimensional diffraction Theory, the representative wave method was used to simulate the measured effective wave height. The distribution of wave pressure peaks along the cofferdam surface and the variation with water depth were determined. The wave dynamic pressure peaks on the cofferdam surface were analyzed. The results show that the three-dimensional diffraction theory can reasonably simulate the surface pressure distribution of the cofferdam. Under the influence of the diffraction effect, the total wave pressure and the dynamic pressure of the wave show a large wave-front, The characteristic of the small side, the largest dynamic pressure wave up to 125%; measured total pressure increases with water depth increases, wave pressure wave peak decreases with water depth increases.