地震液化判别问题探讨  

Discussion on Problems of Seismic Liquefaction Estimation

作　　者：刘振红[1] 张一[1] 陈艳国[1] 

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《资源环境与工程》2015年第5期706-709,共4页Resources Environment & Engineering

摘　　要：《建筑抗震设计规范》(GB 50011—2010)采用非线性公式计算临界标准贯入击数,对采用地震分组调整系数区分远震、近震的影响,液化深度可计算至20 m,能全面反映地震液化的实际情况。《水利水电工程地质勘察规范》(GB 50487—2008)采用线性公式计算临界标准贯入击数,虽然与建筑规范差别不大,液化深度若推延至20 m,将出现较大误差。因此,在计算时可根据工程的实际运用工况,按水利规范对实测标贯击数进行修正,采用建筑规范计算环境条件改变后的液化指数,以全面评价环境条件改变对场地液化等级的影响。In code for Seismic Design of Buildings （GB 50011-2010）,nonlinear formula is used for calculating the value of critical of standard penetration hammering number with different effect coefficient for distant earthquake and local earthquake,and the calculated liquefaction depth can reach to 20m,which can reflect the real condition of earthquake liquefaction.In Code for Engineering Geological Investigation of Water resources and Hydropower （GB50487-2008）,the value of critical of standard penetration hammering number is calculated by using linear formula ,there are no great differ-ences between the results of the two calculating methods ,however ,if the liquefaction depth postpone 20 m,it will be a lar-ger error.Therefore,according to the actual use conditions of the project ,correct the actual measured Standard Penetration Number .In accordance with Engineering Geological Investigation of Water resources and Hydropower ,at the same time , calculate the liquefaction index after the changed environmental conditions ,in order to fully evaluate the impact on site liquefaction grade because of the changed environmental conditions .

关 键 词：地下水位抬升 液化指数 液化等级 

分 类 号：P315[天文地球—地震学]