通过低液限黏土的静力触探模型试验, 揭示锥尖阻力、 侧摩阻力、 比贯入阻力、 土体干密度、 含水率等参数之间 的关系及变化规律。试验结果表明: 锥尖阻力与比贯入阻力之间具有较好的相关关系, 锥尖阻力约为比贯入阻力的 0186~ 0 1 92倍; 探头周围土体受力作用机理的改变是产生临界深度的主要原因; 对于相同含水率, 直角坐标系内锥 尖阻力与干密度之间为对数关系, 两者取对数后为线性关系; 对于相同干密度, 锥尖阻力随含水率的减小而增大, 但 锥尖阻力与含水率的线性关系随干密度的增大逐步减弱。

Form the static cone penetration model test of clay with low liquid limit, the relationships among the tip resistance, side friction, specific penetration resistance, dry density, and water content were determined as well as the variation law of the above parameters. T he results showed that (1) the tip resistance has good correlation with the specific penetration resistance, and the tip resistance is 0. 86~ 0. 92 times of the specific penetration resistance; (2) variation of the stress mechanism for the surround2 ing soil of probe is the main reason for the generation of critical depth; (3) under the same water content, the tip resistance has a logarithmic relationship with the dry density in the rectangular coordinate system, and there is a linear relationship between log tip resistance and log dry density; and ( 4) under the same dry density, the tip resistance has a negative correlation with wa 2 ter content, and the linear relationship between the tip resistance and water content becomes weaker with the increasing of dry density.

水利部科技推广计划项目( TG1414) ; 水利部公益性行业科研专项( 201401022; 201101012) ; 安徽省自然科学基金项目 (148085M E99)