吸力式桶形基础负压安装的渗流侵蚀过程研究

沈侃敏; 王宽君; 单治钢; 俞剑; 王滨

doi:10.19912/j.0254-0096.tynxb.2020-0774

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太阳能学报 ›› 2022, Vol. 43 ›› Issue (4) : 380-386. DOI: 10.19912/j.0254-0096.tynxb.2020-0774

电化学储能安全性与退役动力电池梯次利用关键技术专题

吸力式桶形基础负压安装的渗流侵蚀过程研究

沈侃敏^1,2, 王宽君¹, 单治钢¹, 俞剑², 王滨¹

作者信息 +

SEEPAGE INDUCED EROSION PROCESS OF SUCTION BUCKET FOUNDATIONS INSTALLATION UNDER NEGATIVE PRESSURE

Shen Kanmin^1,2, Wang Kuanjun¹, Shan Zhigang¹, Yu Jian², Wang Bin¹

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文章历史 +

摘要

针对吸力式桶形基础负压安装渗流侵蚀效应,建立轴对称坐标下吸力桶在砂性土中负压沉贯的数值模型,应用包含土骨架、流体和液化土颗粒的三相耦合模型描述海床土体,计算负压作用下海床的渗流场分布,并模拟负压引起的渗流侵蚀过程。渗流侵蚀可改变不同区域土体的渗透率,进而引起水力梯度从内侧向外侧转移。基于孔隙水压力场的重新分布,揭示出负压安装的“安全机制”,并对安装临界吸力的变化进行评价,从而为吸力桶的安装提供工程建议。

Abstract

In order to investigate the seepage erosion effect of suction bucket foundation installation under negative pressure, the numerical model of a suction bucket embedded in sand is built in axisymmetric coordinate. A multi-phase model with soil skeleton,fluidized fine particles and water is used to describe the soil. The seepage field during suction installation is firstly calculated, and then the development process of seepage erosion caused by suction installation under negative pressure is simulated. The seepage erosion leads to different permeability values in different zones of the seabed soil, and redistributes the hydraulic gradient from internal side to external side. The “safety mechanism” during suction installation is then revealed and variation of the critical suction is evaluated to provide an advice for suction installation of buckets..

导出引用

沈侃敏, 王宽君, 单治钢, 俞剑, 王滨. 吸力式桶形基础负压安装的渗流侵蚀过程研究[J]. 太阳能学报. 2022, 43(4): 380-386 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0774

Shen Kanmin, Wang Kuanjun, Shan Zhigang, Yu Jian, Wang Bin. SEEPAGE INDUCED EROSION PROCESS OF SUCTION BUCKET FOUNDATIONS INSTALLATION UNDER NEGATIVE PRESSURE[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 380-386 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0774

中图分类号： TU470

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