低桩承台直立式结构护底设计探讨

Discussion on Design of Protective Bottom for Vertical Structure with Low Pile Cap

针对低桩承台直立式结构的承台下方存在会导致波能集中的空腔,从而使得其护底设计相比传统的直立式护岸或码头的护底设计更为复杂的问题,本文以深圳机场三跑道扩建工程的外海堤为例,探讨承台下方及前沿的护底设计方案,对常规设计方案在施工及计算方面存在的问题提出了优化,并采用2D及3D波浪物理模型试验验证了优化方案的合理性和安全性。本文的研究结论可为今后同类项目的护底设计提供借鉴。

Aiming at the problem that the cavities beneath the low pile cap of vertical structure concentrate wave energy,which leads to more complicated design of protective bottom in comparison with that of the traditional vertical revetment or berth structure.Based on the design of external sea dike in Runway No.3 extension project of Shenzhen Airport,the design plans of the protective bottom beneath the cap and of wharf apron are studied,and the construction and calculation problems existed in a conventional design plan are optimized.The optimized plan is verified rational and safe according to 2D and 3D physical model tests of wave.The conclusion can provide a reference for similar projects in the future.