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Abstract The creep behaviors and models of Xilongchi main rockfill and dam foundation gravel are studied through triaxial creep tests. The factors and value range of creep model parameters are analyzed. Based on the test results，the axial and volumetric creep characteristics can be described by a power function in which model parameters are determined by test for creep characteristics. With the stress level increasing，the initial axial creep a of the main rockfill increases while the axial creep strain exponential b decreases obviously，which can be described by exponential function and linear function respectively. The change ranges of the other parameters are achieved by the test results.
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Received: 10 July 2008
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