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以天津滨海新区吹填场地经过真空预压处理的吹填软土为试验材料,对原状土及其重塑土基本性质与蠕变特性进行了试验研究。试验结果表明:经过真空预压处理后的吹填软土同时具有结构性和蠕变性,结构性的存在,对土体蠕变具有重要的影响。在修正的剑桥模型的基础上,对其进行改进,使其考虑结构性的影响,并以此作为蠕变屈服函数,建立了考虑结构性影响的吹填软土半经验半理论蠕变模型。计算结果表明,该模型符合结构性吹填软土实际,可在工程实践中应用。
The basic properties and creep characteristics of undisturbed soil and its remolded soil were studied by using the soft soil under vacuum preloading in the reclaimed land in Tianjin Binhai New Area as the experimental material. The results show that the infilled soft soil after vacuum preloading has both structural and creep properties and structural properties, and plays an important role in the creep of soil. Based on the modified Cambridge model, this model is modified to consider its structural influence. Based on this model, a semi-empirical semi-theoretical creep model of soft soil filled with soft soil considering the structural effect is established. The calculation results show that the model accords with the actual structure of soft clay and can be applied in engineering practice.