真空预压土体强度增长计算方法

Method for calculating strength growth of soft foundation with vacuum preloading treatment

为了探究在土体强度增长计算中有效应力法和有效固结压力法之间的联系,以某工程真空预压处理软土地基为背景,结合现场监测数据,用有效应力法和有效固结压力法分别计算折减系数η和强度增长率K,并与现场实测的土体强度增长值进行对比,以验证利用真空预压法处理的软土地基土的强度增长规律。结果表明:两种方法计算的η与K均呈一次线性关系,K随η的增加而增加,并且二者随着土体深度的增加有递增趋势。

In order to analyze the relationship between the effective stress method and the effective consolidation pressure method, taking soft foundation with vacuum preloading treatment as an example, reduction coefficient η and strength growth rate K were calculated using these two methods, respectively. The calculated values were compared with the measured value, and the rule of soil strength growth for soft foundation after vacuum preloading was disclosed. It can be concluded that η and K calculated by these two methods arc in a linear relationship, K is increasing with η, η and K are increasing with the depth of the soil foundation.