澳门某工程取水口水上基坑设计

由于水上基坑处于水陆交界处或直接位于水域中,工程面临波浪、潮流等作用,其设计方法与陆上基坑有较大差异。以澳门某工程取水口基坑围护工程为例,通过弹性地基梁计算方法和数值模拟计算方法,分别分析了在无动水条件和水流波浪动水条件下围护结构的变形和受力特性,并分析了围护桩刚度和坑底加固参数的敏感性。结果表明:基坑临水侧采用刚度较大的围护桩以及坑底加固可以显著减少水上基坑变形,保证基坑的稳定性。研究可以为类似水上基坑工程设计提供思路和方法。

Design on excavation in water area of water intake of a project in Macao

Excavation in water area is located at the junction of land and water or directly in the water area,which suffers the impact of wave and tide,so the design method of excavation in water area is different from that of excavation in land.Based on the excavation of water intake of a project in Macao,the paper studies the deformation and internal force of the enclosure wall by using elastic foundation beam theory and numerical simulation when the excavation suffers hydrodynamic load and no hydrodynamic load respectively,and analyzes the sensibility on the rigidity of the enclosure wall and the parameter of pit bottom reinforcement.The results show that using enclosure wall of high rigidity in the water side and pit bottom reinforcement can reduce the deformation and enhance stability of the excavation obviously.The research can provide design ideas and methods for similar projects.