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根据黄土的工程特性,在大量的黄土湿陷试验成果的基础上,分析了黄土增湿变形的特征。试验结果表明土在某一级荷重下,黄土的湿陷变形随起始含水量的增加而减小,在小的浸水压力范围内,随压力的增大而增大,而在大的压力范围内,却随压力的增大而减小,但黄土的湿陷总变形不受浸水路径和加荷路径的影响。黄土在较小压力下减湿时,会增大后期的湿陷,在应力较大且不变条件下减湿时,对后期的浸水湿陷并无影响。并应用割线模量理论方法,初步建立了黄土增湿湿陷变形的计算方法。
According to the engineering characteristics of loess, based on a large number of loess collapsibility test results, the characteristics of loess humidification deformation are analyzed. The test results show that the deformation of loess collapses decreases with the increase of initial water content under a certain level of load, increases with the increase of pressure in a small range of submergence pressure, and increases with the increase of pressure in a large pressure range But decreases with the increase of pressure, but the total deformation of loess collapse is not affected by the flooding path and loading path. When the loess is dehumidified under a little pressure, it will increase the later collapsing. When the loess is dehumidified under a large and constant stress, it has no effect on the submerged slump in the later stage. And the method of secant modulus theory is used to establish the calculation method of humidification and collapse of loess.