温州软粘土次固结变形特性试验研究  

Experimental Study on Secondary Consolidation Properties of Soft Soil in Wenzhou

作　　者：俞帆 杨帆[2,3] 李春玲[1] 钱丽英 夏唐代 YU Fan;YANG Fan;LI Chunling;QIAN Liying;XIA Tangdai

机构地区：[1]浙江省交通规划设计研究院有限公司,杭州310006 [2]软弱土与环境土工教育部重点实验室(浙江大学),杭州310058 [3]浙江大学滨海和城市岩土工程研究中心,杭州310058

出　　处：《公路交通技术》2018年第5期1-6,共6页Technology of Highway and Transport

基　　金：浙江省交通运输厅科技项目(2015J10)

摘　　要：为了研究取土仪器、取样深度、软粘土类型、固结压力及压缩指数等对次固结系数Cα的影响,对温州软粘土进行了室内一维固结(蠕变)试验,结果表明:1)取土仪器所产生的扰动影响将降低土体次固结系数;2)当固结压力达到一定值时,次固结系数与土体取样深度无关;3)不同类型的软粘土在不同固结压力下土体次固结系数表现出不同的变化特性;4)次固结系数与压缩指数之比Cα/Cc大致在0.025～0.043之间。通过本次室内试验及结果分析,可为后续预估工程次固结沉降提供理论基础,并对在类似地基上建造的工程具有一定借鉴意义。In order to study the effects of soil borrowing instrument, sampling depth, soft clay type, consolidation pressure and compression index on the secondary consolidation coefficient, this paper carries out an indoor one-dimensional consolidation （creep） test on Wenzhou soft soil. The results show that： 1） The disturbance effect caused by the soil borrowing instrument will reduce the secondary consolidation coefficient of the soil; 2） When the consolidation pressure reaches a certain value, the secondary consolidation coefficient has nothing to do with the sampling depth of the soil; 3） Different types of soft soil are different under the consolidation pressure, and the soil secondary consolidation coefficient shows different variation characteristics; 4） The ratio of secondary consolidation coefficient to compression index（ C α/C c ）as roughly between 0.025 and 0.043. Through this indoor test and analysis of results, this paper can provide a theoretical basis for the subsequent estimation of secondary consolidation settlement, and has certain referential significance for the construction of projects on similar foundations.

关 键 词：软粘土 固结压力 次固结系数 变形特性 

分 类 号：TU447[建筑科学—岩土工程]