Parameters of Duncan-Chang model for hydrostratigraphic units in Shanghai City

ZHANGYun

2008 Vol. 35, No. 1

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ZHANGYun, . Parameters of Duncan-Chang model for hydrostratigraphic units in Shanghai City[J]. Hydrogeology & Engineering Geology, 2008, 35(1): 19-22.

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ZHANGYun, . Parameters of Duncan-Chang model for hydrostratigraphic units in Shanghai City[J]. Hydrogeology & Engineering Geology, 2008, 35(1): 19-22.

Parameters of Duncan-Chang model for hydrostratigraphic units in Shanghai City

ZHANGYun,
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Corresponding authors: ZHANGYun ; ; ; ; ; ;

Publish Date: 15 February 2008

Abstract

Abstract

Many soil samples were acquired from different hydrostratigraphic units in Shanghai City.Drained consolidated triaxial tests were performed.Based on the tests,the parameters in Duncan-Chang model for the units in Shanghai City have been obtained and the change in the parameters has been discussed.The test results indicate that the value of k for clays is smaller than that for sands,whereas the value of kur/k for clays is greater than that for sands.The value of kur/k range within 4～10 for clays and 2～7 for sands.The value of k is closely related to the value of internal friction angle φ and increases with φ in exponential function approximately.The failure ratio Rf often changes between 0.70 and 0.85.And nur/n is nearly not related to n and n often changes within 0.5～1.0.
- Duncan-Chang model /
- parameter /
- Shanghai City /
- land subsidence