吹填软土邓肯-张模型与应变硬化指数理论研究
摘要:天津滨海新区正在进行大规模吹填造陆工程,由于吹填土成分主要以细粒为主,固结不充分,工后沉降问题成为亟需解决的问题。通过吹填软土重塑样的三轴固结剪切试验,以试验所得的应力应变关系曲线为基础,比较研究了邓肯一张模型和应变硬化指数理论。结果表明:两种模型各有特点,邓肯张模型能够准确预测应力应变曲线的始末段,而应变硬化指数理论参数能够反映吹填重塑土的应变硬化能力。
Abstract:Large-scale reclamation project is being conducted in Tianjin Binhai New Area. For plentiful fine grain in dredger fill and uncompleted consolidation,the settlement after construction needs to be solved immediately.In thise paper, triaxial tests were performed on the remoulded samples of the soft dredger fill.Based on the analysis of the stress-strain curves derieved from the tests,duncan-chang model and strain hardening theory were compared.The results showed distinctive characteristies of both models:Duncan-Chang model can predict stress-strain curve accurately at the initial and last stage,but strain hardening theory may reflect strain hardening ability for remoulded dredger fill.
中文标题：
吹填软土邓肯-张模型与应变硬化指数理论研究
Study on Duncan-Chang Model and Strain Hardening Index Theory of Soft Dredger Fill
作者：
张艳,杨爱武,周金
Zhang Yan,Yang Aiwu,Zhou Jin
作者简介:张艳,1986年生,女,汉族,天津人,在读硕士研究生。研究方向:软土工程技术研究,E-mall:kosy.happy@163.com
通讯地址：
1. 天津城市建设学院 土木工程系, 天津 300381; 2. 天津市软土工程特性与工程环境重点实验室, 天津 300381
1.Departmentofcivilengineering,TianjinInstitueofurbanconstruction,Tianjin300381,China; 2.KeylaboratoryengineeringcharacterandengineeringenvironmentofsoftsoilinTianjin,Tianjin300381,China
中图分类号:TU411;TU447
doi:10.3969/j.issn.1007-2993.2011.02.005
出版物：岩土工程技术
收稿日期:2011-02-21
关键词:吹填软土,邓肯-张模型,应变硬化,三轴试验
Key words:soft dredger fill,Duncan-Chang model,strain hardening,triaxial test
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基金项目：
基金项目: 天津市科技发展计划重点科技攻关项目(06YESZSF4000) 天津市科技创新专项资金项目(07FDZDSF02101-04)
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