VOLUME CHANGE BEHAVIOR OF COLLAPSIBLE COMPACTED GNEISS SOIL
VOLUME CHANGE BEHAVIOR OF COLLAPSIBLE COMPACTED GNEISS SOIL
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DOI：
10.1061/(asce)1090-0241(2000)126:10(907
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发表时间：
2000-10
影响因子：
3.9
通讯作者：
J. H. Pereira;D. Fredlund
中科院分区：
文献类型：
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作者：
J. H. Pereira;D. Fredlund
对压实亚稳结构性残积片麻岩土的力学特性进行了试验研究。体积变化进行了研究，使用传统的oedometer细胞和三轴渗透率系统的应力状态变量独立控制。湿应力路径被用来反映现场条件与塌陷的地球结构。压实试样固结下的各向同性和k0-oedometer条件。总体积变化和含水量的变化进行了测量，在指定的基质吸力值以下的湿应力路径下，在给定的负载。通过对试验数据的分析，确定了亚稳结构土的体积变化本构关系。采用最佳拟合模型预测压实亚稳结构残积土湿陷过程中的体积变化特性。测量数据进行了讨论，从唯象和微观的观点。预言...
The mechanical behavior of a compacted metastable-structured residual gneiss soil was experimentally investigated. Volume changes were investigated using both a conventional oedometer cell and a triaxial permeameter system where the stress state variables were independently controlled. Wetting stress paths were utilized to reflect field conditions associated with collapsing earth structures. The compacted specimens were consolidated under both isotropic and k0-oedometer conditions. Measurements of total volume change and water content change were made at specified matric suction values following a wetting stress path under a given loading. The experimental data were analyzed to define volume change constitutive relationships for the metastable-structured soil. Best-fit modeling was used for predicting the volume change behavior of the compacted metastable-structured residual soil during wetting-induced collapse. The measured data are discussed from both phenomenological and microscopic viewpoints. Predict...