粘土流变特性的再认识及确定长期强度的新方法

The Farther Study for the Rheological Behaviour of Clay Soil and the New Determination Method of Long-term Strength

桩基、边坡工程中C、φ值的正确选取是最为重要的。实验室中模拟,一则要考虑应力状态的相似,二则要使方法经济实用。平衡剪法即应此而生。此方法已应用于实践中,且取得了很好的经济效益。长期(494天)的单剪蠕变实验表明,固结压力对变形破坏有着决定性的影响。因此,进行数据整理时应考虑到固结压力的作用。同时,蠕变实验中存在着一个时间尺度效应。实验是在自行设计的应变式单剪仪上进行的。文章最后还进行了实验结果的对比分析。

Simple shearing creep carried for a long time (494 day) indicates that ths consolidation pressure affects the deformation and failure of clay soil heavily. So in the calculation of data,we must take the consolidation pressure into consideration.Furthermore,there is a time scale effect in the creep tests. In the laboratory,we carried out the balance shearing tests with strain-controlled simple shearing apparatus designed by myself, the test results are compared.