摘要
以天津滨海新区吹填场地经过真空预压处理的吹填软土为试验材料,对原状土及其重塑土基本性质与蠕变特性进行了试验研究。试验结果表明:经过真空预压处理后的吹填软土同时具有结构性和蠕变性,结构性的存在,对土体蠕变具有重要的影响。在修正的剑桥模型的基础上,对其进行改进,使其考虑结构性的影响,并以此作为蠕变屈服函数,建立了考虑结构性影响的吹填软土半经验半理论蠕变模型。计算结果表明,该模型符合结构性吹填软土实际,可在工程实践中应用。
The basic characteristics and creep properties of undisturbed and remolded soft dredger fills treated by vacuum preloading from reclamation site in Binhai New Area of Tianjin,are studied.The results show that the soft dredger fill treated by vacuum preloading not only has structural characteristics but also has creep properties;the structural characteristics play a very important role in creep properties of the soil.Through updating the modified Cambridge model,it can consider the impact of structural characteristics;then making it as yield function of creep model,a semi-empirical and semi-theoretical creep model considering the impact of structural characteristics is established.The calculated results show that this model fits the fact of structural soft dredger fill,so it can be put into engineering practice.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2012年第11期3213-3218,3224,共7页
Rock and Soil Mechanics
基金
天津市科技发展计划项目(No.06YFSZSF04000
No.11JCZDJC23900)
关键词
吹填软土
结构性
结构屈服应力
蠕变模型
soft dredger fill
structure
structure yield stress
creep model
