Experimental speculation on scour due to jet flow focusing on the soil particle and the soil element scale level
Experimental speculation on scour due to jet flow focusing on the soil particle and the soil element scale level
复制标题
关注土壤颗粒和土壤元素尺度水平的射流冲刷实验推测
DOI：
10.2208/kaigan.70.i_1041
复制
发表时间：
2014
影响因子：
--
通讯作者：
K. Tsurugasaki
中科院分区：
文献类型：
--
作者：
T. Matsuda;K. Maeda;Michio Miyake;J. Miyamoto;H. Sumida;K. Tsurugasaki
海啸冲刷导致结构物承载力下降。在东日本大地震中，八户港发生了海啸溢流冲刷防波堤的灾害。本文采用两种不同渗透性的岩土材料，从泥沙地基中的牵引力和孔隙水压力两个方面，探讨了溢流冲刷机理。结果，在牵引力的作用下发生冲刷。当采用桑迪土时，冲刷剖面与Yeh等人提出的冲刷剖面相同。然而，我们发现，超孔隙水压力产生的地面由于射流，液化发生。因此，我们需要认识到，分层是由于溢出而产生的。
Scouring due to tsunami causes a decrease in the bearing capacity of structures. Disaster of the breakwater with scour due to tsunami overflow was occurred at Hachinohe-port in East Japan Great Earthquake. The present study attempted to explicate the scouring mechanism due to overflow focusing on the tractive force and the pore water pressure in the sediment ground by using two-type geomaterials that is different permeability. As a result, scour was occurred with tractive force. The scour profile had same profile as proposed by Yeh et al. when sandy soil used. However, we found that the excess pore water pressure was generated in the ground due to jet flow, and liquefaction was occurred. Therefore, we need to recognize that the liquefaction-layer is generated due to overflow.