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前人曾指出液化后伴随着超孔隙水压重新分配的渗透会引起流体破坏的可能性。为了研究这一现象,利用实验室三轴试验将孔隙水注入土壤检测了土壤的渗透剪切破坏。该实验是在各项异性的固结作用后保持差应力,使用孔隙水控制装置在体积不变的应变控制条件下将孔隙水注入。实验中所用的材料是在1995年神户地震时被液化的常规洁净细砂和风化的花岗岩土壤。本文以实验结果为基础,讨论了由孔隙水注入引起的渗透剪切破坏判据和导致后液化行为的剪切应变发展特征。
Previously, it has been pointed out that the infiltration of liquefied water with the redistribution of excess pore water pressure can cause the possibility of fluid destruction. To investigate this phenomenon, pore-water was injected into the soil using laboratory triaxial tests to detect soil seepage shear failure. The experiment is to maintain the differential stress after the consolidation of the opposite sex, using the pore water control device to inject the pore water under constant volumetric strain control conditions. Materials used in the experiment were conventional clean sand and weathered granite soils liquefied at the 1995 Kobe earthquake. Based on the experimental results, this paper discusses the criterion of seepage shear failure caused by pore water injection and the development of shear strain that leads to post-liquefaction behavior.