密实砂土内摩擦角对地基承载力性状影响分析与研究

【摘要】 通过对密实砂土进行一系列三轴排水压缩试验,探讨了砂土的峰值内摩擦角φmax和剩余内摩擦角φres随应力水平的变化规律。运用三轴试验以及离心试验结果,从数值上计算并分析了土的内摩擦角对承载力因数Ny的影响;即承载力因数Ny随着基础尺寸增加而减小是因为土的内摩擦角随着应力水平增加而减小以及土渐进破坏所致,实际内摩擦角值在φmax和φres之间。更多还原

【Abstract】 Based on a series of drained triaxial compression tests the peak friction angle( )and the residual friction angle( )of sand change with stress level were investigated.Using the triaxial test data and the centrifuge test results,quantitative estimation and analysis of the effect of soil friction angle on the bearing capacity factor( )has been presented.The decrease of with footing size is due to the fact that soil friction angles and decrease with stress level and progressive failure of soil,which reduces soil frction angle to a value between and .更多还原