均质无黏性土发生流土破坏的试验研究  

EXPERIMENTAL STUDY ON FLOWING SOIL OF HOMOGENEOUS COHESIONLESS SOIL

作　　者：陆陈杰 LU Chenjie(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Institute of Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江大学岩土工程研究所,杭州310058

出　　处：《低温建筑技术》2022年第10期72-75,共4页Low Temperature Architecture Technology

摘　　要：为了探究粒径大小对无黏性土发生流土破坏的影响,开展了3种级配土的一维土柱流土破坏试验。结果表明无黏性土的流土破坏过程可划分为2个阶段,第一阶段土体未发生侵蚀,第二阶段土体经历了“发生→发展→破坏”的破坏过程。土体发生流土破坏的难易程度、破坏的临界流速会随着颗粒粒径增大而增大,而改变颗粒粒径对流土破坏的临界水力梯度几乎无影响。To explore the influence of particle size on the flowing soil failure of cohesionless soil, one-dimensional soil column flowing soil failure tests of three graded soils were carried out. The results show that the flowing soil failure process of cohesionless soil can be divided into two stages. In the first stage, the soil has not been eroded, and in the second stage, the soil has experienced a failure process of "occurrence → development → failure". The degree of difficulty and the critical velocity of flowing soil failure will increase with the increase of particle size, while the change of particle size has little effect on the critical hydraulic gradient of soil flow failure.

关 键 词：流土 无黏性土 临界水力梯度 颗粒粒径 

分 类 号：TU441[建筑科学—岩土工程]