潮汐水位对海底地层孔隙水压影响研究
STUDY ON THE INFLUENCE OF TIDAL WATER LEVEL ON PORE WATER PRESSURE IN SEABED LAYERS
陈孔福 1何志坚 1魏龙海 1舒恒 1崔庆龙1
作者信息
- 1. 中交第二公路勘察设计研究院有限公司,武汉 430056;中交集团隧道与地下空间工程技术研发中心,武汉 430056
- 折叠
摘要
潮汐作用会使海底地层一定深度内的孔隙水压不断改变,进而影响隧道结构寿命.以厦门同安进出岛通道工程为背景,采用COMSOL Multiphysics有限元软件模拟潮汐作用对海底地层的影响,探讨了潮汐作用下地层渗透性、地基土刚度、潮汐幅值等关键参数对海底地层响应的敏感性.研究结果表明,随着深度的增加,地层受潮汐作用的影响逐渐减小,落潮、涨潮对粉质黏土地层影响深度分别为3.0、4.2 m.建设海底隧道工程时,为避免或减小隧道工程受潮汐作用的影响,选线时应尽量采用合适的深度.分析结果可为后续海底隧道选线提供参考与借鉴.
Abstract
Tidal effects cause fluctuations in pore water pressure within a certain depth of the seabed,which can im-pact the lifespan of tunnel structures.Using the Xiamen Tong'an Island Access Project as a case study,this research employs COMSOL Multiphysics finite element software to simulate the effects of tidal action on the seabed.It investi-gates the sensitivity of key parameters,such as soil permeability,foundation soil stiffness,and tidal amplitude on the seabed response under tidal influence.The findings indicate that the impact of tidal action decreases with increasing depth.Specifically,the influence depths for ebb tide and flood tide on silty clay layers are 3.0 m and 4.2 m,respec-tively.To mitigate the impact of tidal action during the construction of underwater tunnel projects,it is recommended to select appropriate depths during route planning.The analysis results provide valuable references for future under-water tunnel alignment decisions.
关键词
隧道工程/海底地层/数值模拟/潮汐水位/孔隙水压/敏感性分析Key words
tunnel engineering/seabed stratum/numerical simulation/tide level/pore water pressure/sensitivity analysis引用本文复制引用
出版年
2024
NETL
NSTL
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