砂砾改良高液限红黏土的试验研究

Study on the experiment of the gravel modifying the high liquid limit red clay

为合理利用高液限红黏土作路堤填料,针对其易开裂、可压实和水稳定性差等特点,开展了砂砾改良试验研究,提出了以收缩开裂宽度、液塑限为指标确定最佳掺配率的方法,通过湖南衡大公路试验段的修筑,检验了砂砾改良方法的施工可行性和实际效果,为高液限红黏土路堤处治提供了具有实用价值的参考。

For using reasonably the high liquid limit red clay as the roadbed filler, according to the characteristics that the cracking of the clay is easy, the clay can be compacted and the water stability is not good, the author carries out the research of gravel improvement, puts forward the method how to determine the optimal admixture ratio taking the shrinkage cracking width and the liquid and plastic limit as the indexes. Through the construction of the test section of Heng-Da road in Hu＇ nan, the construction feasibility and the actual effect of the gravel improvement method are tested, which provides the valuable reference for the treatment of the embankment of the high liquid limit red clay.