中文摘要：

复合型软土固化剂中各膨胀性组分之间的比例,以及膨胀性组分总体与胶结性组分之间的比例对固化剂的性能有很大影响。以水泥作为胶结性组分、以硫铝酸盐水泥与石膏或高铝水泥与石膏作为膨胀性组分构成复合型软土固化剂固化软土,通过无侧限抗压强度试验、XRD试验,确定了各膨胀性组分之间的最佳比例和膨胀性组分总体与胶结性组分之间的最佳比例,并提出了确定各比例的方法。结果表明：各膨胀性组分之间的比例应符合各组分能充分反应全部生成膨胀性水化物;膨胀组分总体与胶结组分之间的比例宜根据土样孔隙率及其最大填充程度确定。文中结论对于高效软土固化剂设计具有重要指导意义。

英文摘要：

The compound stabilizer performance is impacted by the ratio of expansible component and the quantity ratio of total expansible component to cementations component.In this paper firstly cement is used as cementitious component,and sulphoaluminate cement（or alumina cement） and gypsum is used as expansible component.Then the optimum ratio of expansible component and the optimum quantity ratio of total expansible component to cementitious component are determined by unconfined compressive strength test and XRD test,and the design method of ratio is proposed.The results show that：the ratio of expansible component should guarantee every component react fully and generate expansible hydrates totally;the optimum quantity ratio of total expansible component to cementitious component should be designed according to the porosity of soil sample and the maximum porosity filling degree.These conclusions have important guidance significance for effective soft soil stabilizer design.