›› 2010, Vol. 31 ›› Issue (1): 187-192.

• Geotechnical Engineering • Previous Articles     Next Articles

Test of dynamic properties of loess and Study on resistance of earthquake impact for earth-rock dam on deep loess foundation

CEN Wei-jun1，GU Gan-chen1，MIN Jia-ju2，SUI Shi-jun2   

  1. 1. College of Water Conservancy & Hydropower Engineering, Hohai University, Nanjing 210098, China; 2. Beifang Investigation, Design & Research Co. Ltd., of China Hydropower Consulting Group, Tianjin 300222, China
  • Received:2008-07-16 Online:2010-01-10 Published:2010-02-02

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Abstract:

The dynamic triaxial test, resonance column test and other dynamic tests are carried out for the loesses which exist on subgrade and core wall of an earth-rock dam on deep loess foundation. The dynamic shear strength, dynamic stress-strain relation, dynamic pore water pressure curves and other dynamic parameters are obtained. Based on the dynamic test results and static analysis, the dynamic response analysis of the dam with foundation is calculated by 3D nonlinear effective stress FEM. The calculation results show that the loess foundation will be liquefied under the earthquake intensity Ⅶ. Therefore, an economical measure for overcoming the liquefying disaster is proposed. The effect of the resisting measure for earthquake destroying is discussed; and the optimum result is obtained at last.

Key words: loess, earth-rock dam, dynamic properties, crack, dynamic pore water pressure, liquefaction, resistance of earthquake impact

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