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以乌鲁木齐市粉质粘土为研究对象,研究了含水率、压实度和冻融循环对回弹模量的影响。在大量实验的基础上,得出了相关土类基本参数、相关曲线、试件制备数据。最后对所得回弹模量试验结果采用正交试验分析方法进行了显著性分析。结果显示:不同类型的土样在历经3~4次循环后,其回弹模量值基本全都趋于稳定。含水率、压实度以及冻融循环作用对回弹模量影响程度排序为:含水率>冻融循环作用>压实度。得出了正交试验方法下的最佳组合状态。
Taking silty clay in Urumqi as the research object, the influence of moisture content, compaction degree and freeze-thaw cycles on the elastic modulus was studied. Based on a large number of experiments, the related soil basic parameters, correlation curves and specimen preparation data were obtained. At last, the test results of the obtained rebound modulus were analyzed by using orthogonal test. The results show that the elastic modulus values of different types of soil tend to be stable after all three or four cycles. The influence of moisture content, compaction degree and the effect of freeze-thaw cycles on the springback modulus are: moisture content> freeze-thaw cycle effect> compaction degree. The best combination under orthogonal test is obtained.