某库区移民场地条件变化后的砂土液化研究
STUDY ON SANDY SOIL LIQUEFACTION AFTER THE CHANGE OF RESETTLEMENT SITE CONDITIONS IN A RESERVOIR AREA
吕庆强 1蔡伟2
作者信息
- 1. 四川省交通勘察设计研究院有限公司,成都 610031
- 2. 浙江华东建设工程有限公司,杭州 310030
- 折叠
摘要
砂土液化研究多聚焦于饱和土体,但常因工程建设导致场地条件变化导致原处于非饱和状态的无黏性土或少黏性土达到饱和状态,在地震作用下可能发生砂土液化.以金沙江某移民场地为典型案例,采用颗粒分析和标准贯入锤击数法,研究水库蓄水或场地垫高等工况变化条件下,饱和少黏性土和无黏性土的液化判别.分析和计算得出含粉土砂存在砂土液化情况及砂土液化范围,进而提出了解决砂土液化的措施建议.场地条件变化后的砂土液化研究对类似工程设计和建设具有一定参考价值.
Abstract
The study of sand liquefaction mostly focuses on saturated soils,but often changes in site conditions due to engineering construction lead to saturation of non-cohesive soils or less cohesive soils originally in unsaturated state,and sand liquefaction may occur under seismic action.A typical case of a migration site in Jinsha River is used to study the liquefaction discrimination of less cohesive soils and cohesionless soils under the changing conditions of reservoir storage or site pad height by using particle analysis and standard penetration hammering number method.The liquefaction of sandy soil containing silt and the extent of sandy soil liquefaction are analyzed and calculated,and then the proposed measures to solve the sandy soil liquefaction are proposed.The study of sandy soil liquefaction after changing site conditions is of reference value for the design and construction of similar projects.
关键词
砂土液化/颗粒分析/标准贯入/液化等级Key words
sand liquefaction/particle analysis/standard penetration/liquefaction grade引用本文复制引用
出版年
2024
NETL
NSTL
万方数据