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以天然应变为基础,引入考虑软土次固结本构模型的沉降计算方法,对申嘉湖高速公路K95+24取土并进行室内单向固结试验。结果表明:以天然应变为基础作出的εH-lnt曲线相比于以线应变为基础作出的εc-lnt曲线更有规律,当应力小于200 kPa时,文中计算的结果与传统方法计算的结果差别较小,当应力大于200 kPa时,本文计算的结果同实测值更为符合。同时,以天然应变为基础的Istoache本构模型所计算的P-T-S曲线相比于传统方法的计算值更加于实测值相符。
Taking the natural strain as the foundation, the settlement calculation method considering the sub-consolidation constitutive model of soft soil was introduced to take the soil from K95 + 24 of Shenjiahu Expressway for indoor unidirectional consolidation test. The results show that the εH-lnt curve based on the natural strain is more regular than the εc-lnt curve based on the linear strain. When the stress is less than 200 kPa, the difference between the calculated result and the traditional method Smaller, when the stress is greater than 200 kPa, the results calculated in this paper are more in line with the measured values. At the same time, the calculated P-T-S curve of Istoache’s constitutive model based on natural strain is more in line with the measured value than the traditional method.