Experimental Study on Development Characteristics of Dynamic Pore-water Pressure of Anti-filter Material in High Earth-rock Dam

A series of dynamic triaxial tests which used saturated samples of three different particle size distribution anti-filter materials in high earth-rock dams have been investigated for the development of dynamic pore-water pressure. The experimental results show that the relationship between mu(d)/sigma'(m), and N/N-f in the same consolidation condition are unitary if we applied different dynamic stress to the same particle size distribution anti-filter material. Besides, if N/N-f<0.6, the value of mu(d)/sigma'(m) increases quickly. The increase rate of mu(d)/sigma'(m), will be slower if N/N-f >= 0.6. When the consolidation stress ratio is invariant, the change of ambient pressure has no effect on relationship between mu(d)/sigma'(m). and N/N-f. When the gradation and ambient pressure of anti-filter material are changeless, the change of consolidation stress ratio has obvious effects on relationship between mu(d)/sigma'(m) and N/N-f. When the value of consolidation stress ratio is increase, the number of dynamic pore-water pressure ratio obviously decrease. When the consolidation condition of anti-filter material is changeless, the change of anti-filter material's grade doesn't have obvious effects on the relationship between mu(d)/sigma'(m) and N/N-f.