基于冻融循环对石灰土地基土体回弹模量分析研究

Analysis and Research on Resilience Modulus of Lime Soil Based on Freeze-thaw Cycle

为了得到石灰土路基在冻融循环条件下其弹性模量以及其余的力学性质的变化规律,基于室内冻融循环实验,并采用动三轴试验,对石灰土路基试件进行反复加载和冻融循环,分析了不同含水率、不同掺灰比以及冻融循环次数对石灰土路基带来具体力学性质变化规律,从本次试验结果得到:上述因素均会对石灰土地基的回弹模量造成影响,其中,以冻融循环次数的影响最大。冻融循环次数越多,试件内含水率越大,掺灰比越小,则所受影响越明显。

In order to get the change rule of elastic modulus and other mechanical properties of calcareous soil subgrade under freeze-thaw cycle,based on indoor freeze-thaw cycle experiment and dynamic triaxial test,repeated loading and freeze-thaw cycle were carried out on calcareous soil subgrade specimen,and the change rule of concrete mechanical properties brought by different moisture content,different mixing ratio and freeze-thaw cycle times was analyzed.From this test result,it was found that all the above factors would affect the resilience modulus of calcareous soil subgrade,and the freeze-thaw cycle times had the greatest influence.And the more times of freeze-thaw cycles,the greater the water content in the specimen,and the smaller the mixing ratio of ash,the more obvious the influence is.