风化碎石回填土的稳定性试验研究

Experimental Research on the Steady State of Completely Decomposed Granite Fills

在大量三轴实验的基础上 ,对全风化的花岗岩回填土的稳定性进行了分析研究 .对试样的相对压实度、初始含水量、应变速率、固结比、试样的重塑、排水条件因素等对稳定状态的影响进行了试验研究 .试样在轴向应变为 2 0 %左右时达到稳定状态 .试样的稳定状态线在 qss～ p’ss图中是唯一的直线 ,而在vss～logp’ss图中则不是唯一 。

Based on a comprehensive triaxial testing program, the steady state of completely decomposed granite fills is analyzed. The effect of relative compaction, initial moisture content of specimens, strain rate, consolidation ratio and reconstitution of specimens and drainage condition are investigated. Specimens reach the steady state at the axial strain of about 20%. The steady state line is a unique linear line on the q ss ～p' ss plot, but it is not unique on the v ss ～ log p' ss plot; its location on the v ss ～ log p' ss plot depends on the above mentioned factors.