利用qc,D50评价砂土地震液化势研究

本文根据国内外地震液化调查资料，建立了利用双桥静力触探锥头阻力ｑｃ和平均粒径Ｄ５０判别地震液化势的半经验性方法。这种方法对评价地震液化势是颇为有效的。

LIQUEFACTION PREDICTION BASED ON q_c AND D_(50)

A review of field liquefaction behavior during earthquakes has been made with emphasis on the cone penetration test(CPT)qc-values and the grain size of the soils. From that,several practical methods to evaluate the liquefaction potential have been developed. In view of the field data of soil liquefaction during recent earthquakes especially the field data of silt in Tianjing during Tangshan earthquake we have developed a liquefaction assessment method using CPT and D50. The critical nomalized cone resistance (qnc)cr,is defined as a function both of the cyclic stress ratio and the mean size of soil. The liquefaction prediction method presented here has been proved very useful for the present time.