粉煤灰湿陷变形的三轴试验和计算

Triaxial test and calculation about collapsibility deformation of coal ash

采用双压力室三轴仪对粉煤灰试样进行了单线法湿陷试验,研究了在静水压力作用以及在不同应力状态和应力水平下粉煤灰湿陷变形的规律,得出了粉煤灰湿陷变形的经验计算公式。提出了计算粉煤灰地基湿陷变形的“全应变曲线”增量有限元法。基于本文的试验结果,对一个粉煤灰地基的湿陷变形进行了有限元计算。

By a triaxial apparatus with a double pressure cell , single line collapsibility tests of coal ash have been carried out. Some relations of collapsibility deformation of the coal ash samples only under the normal stress and under different stress states and stress levels have been obtained. The empirical formula for calculating collapsibility deformation has been presented on the basis of test data. An increment FEM using “full strain curve” for coal ash ground has been put forth; and a calculation example has been done.