摘要
针对吸力式基础(吸力桶)负压沉贯中的桶体倾斜,自行研制了专门的试验平台,并开展了一系列物理模型试验,模拟了水平与倾斜的地基初始状态下单个吸力桶贯入过程,探究了在地基倾斜状态下桶体贯入发生倾斜时的贯入机制。试验结果表明,吸力桶贯入深度演变曲线与贯入负压有关,其表示为三个规律性阶段:线性增加阶段、缓慢收敛阶段以及极限阶段。倾斜状态下贯入部位附近孔隙水压力的变化可反映基础的倾斜状态和倾斜程度。同时,负压的增大对桶基础倾斜有一定抑制作用。
This paper presents a series of model tests to simulate the penetration process of a suction bucket in horizontal and inclined seabed.The penetration mechanism of the bucket in inclined seabed is explored.A special test platform is developed for studying the tilt of the suction foundation(suction bucket)during the research.The results of the tests indicate that the curves of the penetration depth could be composed of three regular periods related to the negative pressure:Linear increasing stage,Slow convergence stage and The limit stage.In addition,the variation of pore water pressure near the penetration shows the inclined state and degree of the caisson.Meanwhile,the study shows that the increase of the negative pressure appears to be capable to avoid the inclination.
作者
谢立全
李晓波
马士力
XIE Liquan;LI Xiaobo;MA Shilli(Department of Hydraulic Engineering,Tongji University,Shanghai 200092,China)
出处
《结构工程师》
北大核心
2020年第1期113-119,共7页
Structural Engineers
关键词
吸力桶
贯入
倾斜
孔压
suction bucket
penetration
inclination
pore water pressure
