波浪荷载下钙质砂孔压增长特性的试验研究  

Experimental Research on Development Pattern of Pore Water Pressure of Carbonate Sand Under Wave Loads

作　　者：虞海珍[1] 汪稔[2] 赵文光[1] 李建国[2] 何杨[3] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074 [2]中科院武汉岩土力学研究所,武汉430070 [3]大连理工大学岩土工程研究所,大连116024

出　　处：《武汉理工大学学报》2006年第11期86-89,共4页Journal of Wuhan University of Technology

摘　　要：利用土工静力-动力液压三轴-扭剪多功能剪切仪模拟海洋波浪的加载形式,对相对密度为30%的钙质砂进行扭转和竖向加载耦合循环剪切试验,着重研究波浪荷载作用下主应力方向连续旋转及初始主应力方向角α0对饱和钙质砂孔隙水压力增长特性的影响。结果表明,主应力方向的连续旋转导致了钙质砂中孔隙水压力的增长。初始主应力方向和动应力幅值对钙质砂的孔压增长模式有显著的影响;归一化后的孔隙水压力比与广义剪应变之间的关系可以用双曲线表示。The .soil static and dynamic universal triaxial and torsional shear apparatus which can simulate the cyclic stress characteristic of ocean wave were used to perform experimental tests on loose carbonate sands with a relative density of 30% subjected to vertical-and-torsional coupling cyclic shear. The tests were carried out to investigate the effects of the continuous rotation of principal stress and the rotation angle of initial principal stress α0 on the development pattern of pore water pressure of saturated carbonate sand under wave loads. It was showed that the continuous rotation of principal stress induced the development of pore water pressure in carbonate sand. The initial orientation of principal stress and the amplitude of cyclic shear stress affected the development pattern of pore water pressure significantly. The results also showed that the relationship between the normalized pore water pressure and the generalized strain fit the bilinear model.

关 键 词：波浪荷载 钙质砂 孔隙水压力 

分 类 号：TU435[建筑科学—岩土工程]