饱和粉土振动孔隙水压力的试验研究

Study on Pore Water Pressure of Saturated and Disturbed Sandy Loam During Cyclic Loading

本文通过饱和粉土的动三轴试验，总结和分析了饱和粉土的振动孔隙水压力发展规律，提出了振动孔压力比与振次比之间满足幂函数关系的孔压发展模式，说明了饱和少粘性土振动初期孔压急剧上升随之逐渐趋于稳定的特点，并分析了产生的原因及其粘粒的影响，验证了Lee提出的振动孔压比U/σ0'可以表示为大主应变ξ1的单一函数这一结论，推导出振动孔压发展极限值与团结比民间的关系，为实际工程和进一步的研究提供了参考依据．

Based on the results of dynamic triaxial tests on saturated and disturbed sandy loam, the special regularity of pore water pressure development is studied and analyzed in this paper. A relationship of pore water pressure ratio versus vibration number ratio is found out. A new model of pore water pressure development is proposed, The characteristic of sandy loam is demonstrated that pore water pressure increasing rapidly under the early cyclic loading and increasing slowly later. And the reason and effects of clay content is studied. The pore pressure -strain relationship that suggest by Lo. Is proved in the tests. The relationship that ultimated pore pressure lonsalidation ratio is deduced. The results and concusions of this paper provide references both for practical prerjects and further studies.