低有效应力状态下疏浚泥不排水强度试验研究  

Research on Undrained Shear Strength of Dredged Slurries after Self-consolidation

作　　者：徐桂中[1] 别学清[2] 周金荥 

机构地区：[1]盐城工学院,盐城210008 [2]江苏省工程勘测研究院,扬州225002 [3]青岛久瑞建筑工程有限公司,青岛266061

出　　处：《科学技术与工程》2013年第33期10042-10045,10049,共5页Science Technology and Engineering

摘　　要：运用平板贯入剪切法对自重固结后的高含水率疏浚泥进行不排水强度试验,探讨低有效应力状态时试验结果。疏浚泥自重固结后的不排水强度随含水率的增加非线性降低。在相同含水率时,自重固结后的不排水强度显著大于重塑状态时的不排水强度。同时高含水率疏浚泥自重固结后的不排水强度随有效应力的变化关系与天然沉积土的强度包线相似,当有效应力小于0.2 kPa时,不排水强度随有效应力的变化较小,当有效应力大于0.2 kPa时,不排水强度随有效应力的增大而增大。Plate penetration teston undrained sheastrength were performed on dredged slurrieafteserf-con- solidation, which indicatethathe undrained sheastrength of dredged slurrieafteself-consolidation decreasenonlinearly with watecontenincreasing and ilargethan the undrained strength of reconstituted dredged slurrieathe same condition. Besides, the undrained sheastrength of dredged slurrieafteself-consolidation increasewith effective stresincreasing when effective stresilagethan0. 2 kPa, buchangelittle with effective stresin- creasing when effective streslowethan 0. 2 kPa, which isimilato the relationship between sheastrength of na- ture clay and effective stress.

关 键 词：疏浚泥 不排水强度 含水率 有效应力 

分 类 号：TU11[建筑科学—建筑理论]