某坝基覆盖层深层粉土地震液化判别方法研究  

Study on Seismic Liquefaction Discrimination Method of Deep Silt in Dam Overburden

作　　者：余敏 陈曦阳 Yu Min;Chen Xiyang(China Machinery TIDI Geotechnical Engineering Co.,Ltd.,Wuhan 430014,Hubei,China)

机构地区：[1]中机三勘岩土工程有限公司,湖北武汉430014

出　　处：《岩土工程技术》2021年第6期382-386,共5页Geotechnical Engineering Technique

摘　　要：以某坝基覆盖层深度19.5~31.0 m范围内深层粉土为研究对象,进行了液化可能性判别。根据土样颗粒级配进行了液化初判,对于初判可能发生液化的土样采用相对含水率法进行复判,并结合动三轴液化试验成果,采用seed法对土层液化可能性进行了复核验证。结果表明:坝基覆盖层深度19.5~31.0 m范围内的饱和粉土层存在着液化的可能。采用的判别方法和取得的成果可以为类似工程场地液化判别提供参考和借鉴。Liquefaction discrimination was conducted in deep silt of a dam overburden within the range of 19.50~31 m.According to the particle gradation of soil samples,the initial liquefaction discrimination was accomplished.For the soil samples that can be liquefied in the initial discrimination,the relative water content method was used for the second discrimination.Combined with the results of the dynamic triaxial liquefaction test,the seed method was used to verify the possibility of soil liquefaction.The result shows that the deep silt within the range of 19.50~31 m of dam overburden may be liquefied.The method and results can provide reference for the liquefaction discrimination in the similar engineering.

关 键 词：深层粉土 液化判别 颗粒级配 相对含水率 液化试验 

分 类 号：TU195.2[建筑科学—建筑理论]