Nierji Water Conservancy Foundation Of Sand And Gravel Layer Liquefaction Evaluation

This article discussed the application of shear stress pairing method to evaluation dam base vibration liquefaction of earth-fill dam according to the problem that the sand and gravel layer of main dam base could be liquefied in the condition of seismic intensity grade Vll in the design of Nierji hydro project. To determine if the dam base been liquefied through contrasting the shear stress which caused sand and gravel layer liquefied measured from indoor dynamic triaxial teat with calculated shear stress caused by earthquake in different depth of sand and gravel layer. And according to result of comparison to direct the design scheme of dam base. Moreover, this article also discussed how the variation of relative density and average grain diameter influenced the shear stress of sand and gravel layer.