摘要
To provide the freezing design parameters for the project that needs the cement reinforced soil,the artificial ground freezing method for the added reinforcement in urban subway constructions is used.In order to master the mechanical properties and design parameters of frozen cement soil,a series of tests research on the unconfined compressive test of freezing cement soil in laboratory are conducted.The tests showe that with the decreasing temperature or the increasing cement content,the unconfined compressive strength of the cement soil linearity increases.With the increasing curing period,the unconfined compressive strength of the cement soil logarithmically increases.With the decreasing temperature,the elastic modulus of cement soil linearly increases.In normal temperature,the elastic modulus increases linearly with the increase in cement ratio.In temperature of-10℃,the elastic modulus exponential increases with the increase in cement ratio,and the elastic modulus logarithmically increases with the cement ratio increases.Of the three factors of temperature,cement ratio and age,the impact of temperature on the compressive strength of cement soil is the largest.With the increasing cement content and curing period,the ratio of the compressive strength ato the compressive strength of freezing cement soil and cement soil at room temperature exponentially decreases,and eventually stabilizes.
