钱塘江河口浅层粉土吹填后的动力特性试验

Dynamic Characteristics Test of Qiantang River Estuary after the Shallow Silt Reclamation

选取钱塘江河口广泛分布的浅层粉土,经水力吹填后进行不同频率下的动力特性试验。试验结果表明：粉土的轴应变随时间的发展是非线性的;随着频率的增大,粉土的动应力适当提高,试样达到破坏所需的振动次数也增多;动荷载的作用可使孔压的发展在最初的振次内急剧上升到最终孔压的50%~60%。

This paper selected the Qiantang river estuary widespread shallow silt, carried out dynamic characteristics test under different frequencies after hydraulic fill. Experimental results show that the axial strain of the silt is nonlinear with the development of the time. With the increasing frequency, dynamic stress of the silt increases appropriately, the samples require more vibration times to achieve damage. The effect of dynamic load can make the pore pressure rise sharply to 50% ~ 60% of the final pore pressure within the initial vibration times.