基于均匀设计的重力式沉箱码头抗倾稳定敏感性分析

Sensitivity analysis of anti-overturning stability of gravity caisson wharf based on uniform design

运用数论中的均匀设计思想,选择影响重力式沉箱码头抗倾稳定的主要因素进行敏感性分析,可以通过较少次数的试验获得良好的试验效果。以泉州某重力式沉箱码头为例,选取码头前行波高、回填块石内摩擦角、码头面门机荷载以及沉箱宽度等4个因素来设计数值试验,对其抗倾稳定性进行了敏感性分析。结果表明:对于常见形式的重力式沉箱码头,后方回填块石的内摩擦角φ为最敏感因素,沉箱宽度l次之,码头面门机荷载N以及码头前行波高h为较不敏感因素。

The calculation of anti-overturning stability is an important part in the structure design of gravity caisson wharf. The method of uniform design is used for the sensitivity analysis of anti-overturning stability of gravity caisson type wharfs, which can effectively reduce the test times and improve the test effectiveness. As a case study, the sensitivity analysis of a caisson gravity wharf in Quanzhou is carried out with selecting four factors including the wave height, angle of internal friction of the backfill rubble, gantry crane load on wharf and the width of a caisson. It is found that for common forms of gravity caisson wharf, the angle of internal friction of the backfill rubble and the width of a caisson are the most sensitive factors, while the gantry crane load on wharf and wave height are less sensitive factors