利用q_c,D_(50)评价砂土地震液化势研究  

LIQUEFACTION PREDICTION BASED ON q_c AND D_(50)

作　　者：张荣祥[1] 石兆吉[2] 

机构地区：[1]建设部综合勘察研究设计院,中国北京100000 [2]国家地震局工程力学研究所,中国哈尔滨150080

出　　处：《地震工程与工程振动》1995年第1期100-110,共11页Earthquake Engineering and Engineering Dynamics

摘　　要：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q_c和平均粒径D_(50)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。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.

关 键 词：砂土液化 液化势 锥头阻力 平均粒径 地震 

分 类 号：TU435[建筑科学—岩土工程]