碎石改良高液限红粘土击实性能试验研究

摘要

In order to study the effect of crushed stone on the improved high liquid limit red clay, two groups of crushed stone with different diameters were selected and mixed into the test soil sample with different proportion. Then a compaction test is implemented on improved test soil sample. The high liquid limit red clay that improved by different admixture ratio of rubble have different change rules of compaction curve ,which indicates that the optimum moisture decreases and the maximum dry density increases while its admixture increases. Both the clayey gathering effect of the high liquid limit red clay and the diameter of crushed stone have influences on the effect of soil improving. Although the maximum dry density of two groups is increasing with the rise of admixture, the trends of both are different, and the improved effects of both are different.%为了研究碎石对改良高液限红粘土的影响，选用两组不同粒径的碎石，按不同比例掺入试验土样中，并进行击实试验。实验结果表明不同掺料比的碎石改良高液限红粘土的击实曲线变化规律不同，随着掺料比的增加最优含水率逐渐减小，最大干密度逐渐增大。由于碎石的粒径大小和高液限红粘土的土团效应对碎石改良此类土均有影响，尽管两种碎石改良土最大干密度均随着掺料比的增加而逐渐增大，但二者的趋势存在差异，可见二者的改良效果有区别。