To simulate the deformation of soils in fill construction, it is necessary to build up the constructive model under the stress path of constant ratio of principal stress.
为了模拟填土工程中土体的变形，需要建立在等主应力比应力路径下的本构模型。
It was indicated by the existing researches that the principal stress ratio in the stress path of rockfill DAMS kept constant during the period of dam construction.
已有研究表明，土石坝内堆石料在填筑期的应力路径可近似为等应力比的路径。
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