不同液化判别方法在下辽河地区的对比分析  

Comparative Analysis of Different Liquefaction Evaluation Methods in the Xialiaohe River

作　　者：齐鑫[1] 丁浩[1] 王奕月 QI Xin;DING Hao;WANG Yiyue(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)

机构地区：[1]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2024年第2期14-21,共8页Journal of Disaster Prevention And Reduction

基　　金：中国地震局地震科技星火计划项目(XH14013Y)。

摘　　要：结合海城地震液化资料,选取四种具有代表性的液化判别方法,通过判别结果与地震液化资料的对比分析,得出各种判别方法的优劣。四种方法可归纳为利用规范和室内实验两大类。结果表明:规范方法,判定结果的准确率为42.8%;调整的规范方法,准确率为88%;室内实验的输入正弦波方法,准确率为88%;室内实验的地震波法,准确率为77%。规范方法优点方便快捷,缺点是利用规范提供参数准确率有限;室内实验方法优点是物理原理清楚,缺点是需要进行土层地震反应计算。由此说明,利用规范方法,并适当调整参数,可以有效提高液化判定准确率。At present,there are many methods for liquefaction evaluation,but the accuracy of some methods is low.Based on the seismic liquefaction data of Haicheng,four representative liquefaction discrimination methods are selected to compare the discriminant results with the seismic liquefaction data,by which the advantages and the disadvantages of various discriminant methods are concluded.The four methods can be divided into two categories:utilization specification and laboratory experiment.The results showed that the accuracy of standard method was 42.8%,the accuracy of the criterion method of adjusting parameters is 88%,the input sinusoidal method in laboratory experiment has an accuracy of 88%,the accuracy of seismic wave method in laboratory experiments is 77%.The advantage of the specification method is convenient and fast,but the disadvantage is that the accuracy of parameters provided by the specification is limited.The advantage of laboratory experiment method is clear physical principle,but the disadvantage is that it needs to calculate seismic response of soil layer.It can be concluded that the accuracy of liquefaction determination can be effectively improved by using the standard method and adjusting the parameters.

关 键 词：液化 判别方法 实验准确率 海城地震 对比分析 

分 类 号：P315.9[天文地球—地震学] TU44[天文地球—固体地球物理学]