山东交通科技

为探究水泥改良土路基在冻融循环作用下的刚度变化规律，采用室内试验研究压实度、含水率及冻融循环次数对水泥改良土的回弹模量及CBR影响规律。研究结果表明，水泥改良土回弹模量及CBR均随含水率增加先增加后减少，随压实度增大而增大，随冻融循环次数增加而减小，且二者存在良好幂函数关系。

To investigate the change rule of stiffness of cement improved soil roadbed under the action of freezethaw cycle, the indoor test was used to study the effect of compaction, water content and the number of freezethaw cycles on the resilience modulus and CBR of cement improved soil. The results show that there is a good correlation between the resilience modulus and CBR of cement-improved soil, which increases and then decreases with the increase of water content, increases with the increase of compaction, and decreases with the increase of the number of freeze-thaw cycles.