摘要
在波浪和海流作用下,多层粉质土海床可能会发生液化破坏,进而影响工程构筑物的安全。以黄河三角洲为背景,选取垦东地区三种典型粉质土海床,基于Terzaghi固结方程和Biot渗流理论,验证了波流作用下多层土海床累积孔压响应模型,探讨了三种不同典型海床累积孔压与液化特征的差异,以及波流参数对海床动力响应的影响。结果表明,上覆硬壳层的海床累积孔压竖向分布出现了两个峰值,并且液化深度可达7.8 m,流速、波高和水深对累积孔压影响显著,而周期影响相对较小。此外,当波浪传播方向顺流时,随着流速的增大,上层土体累积孔压逐渐增大,降低了海床的稳定性。
Based on Tergazhi’s consolidation equation and Biot’s seepage theory,we established the residual pore pressure model and verified its applicability in the multilayered seabed of Yellow River Delta where the hyperbolic pore pressure module of silty soil under combined wave and current has been developing,and explored also the difference among the characteristics of accumulated pore pressure and liquefaction in various seabed.In addition,we clarified the effects of current and wave on the dynamic response.The numerical results demonstrated that seabed with upper harder layer is easier to be destroyed than others.Current velocity,wave height and mean water depth significantly influenced the accumulated pore pressure while wave period weakly did so.Accumulated pore pressure in the upper layer increased with current velocity,thus declined the stability of seabed.
作者
于雅琼
王起刚
谭长伟
丁奇奇
王伟
常季青
于淼
Yu Yaqiong;Wang Qigang;Tan Changwei;Ding Qiqi;Wang Wei;Chang Jiqing;Yu Miao(Qingdao Surveying&Mapping Institute,Qingdao,Shandong 266032,China;Qingdao Geotechnical Engineering Research Center,Qingdao,Shandong 266032,China)
出处
《海洋湖沼通报》
CSCD
北大核心
2021年第3期41-47,共7页
Transactions of Oceanology and Limnology
基金
国家自然科学基金项目--波浪作用下海上风电场桩基土体液化响应研究—以黄河三角洲为例(41572247)资助。
关键词
累积孔压
动力响应
粉质土
硬壳层
波流
Accumulated pore pressure
Dynamic response
Silty soil
Harder layer
Wave-current
