林政¹，赵智君²

（1 浙江省建筑设计研究院，杭州 310006； 2 浙江省超维建筑设计院，杭州 310011）

 

［摘要］利用吹填淤泥造地能够解决建设用地紧缺及吹填淤泥对环境污染等问题。联合IFCO BAT系统和TDR系统，设计大型模型试验对吹填土在自重及真空负压下固结特性进行研究。试验得到吹填淤泥在固结过程中孔隙比、渗透系数、孔隙水压力和土面沉降的变化情况，并整理得到孔隙比和渗透系数随有效应力的变化关系，发现与Tiller(1984,1985)模型接近，同时得到了Tiller模型中各项参数。还在Gibson一维大变形固结理论和Tiller模型基础上建立了以有效应力为控制变量的吹填淤泥在自重和负压作用下的固结模型，并用差分法对其进行求解。讨论了孔隙水压力在固结过程中的变化情况和固结度随负压的变化情况。最后，采用所提出的固结模型对吹填淤泥模型槽试验进行了分析，理论计算结果与试验结果相近。

［关键词］吹填淤泥;自重;负压;固结特性;孔隙水压力;有效应力;渗透系数;孔隙比;沉降

中图分类号：TU-472文献标识码：A文章编号：1002-848X(2012)08-0114-05

 

Lin Zheng¹, Zhao Zhijun²

(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China; 2 Zhejiang Chaowei Architectural Design Institute, Hangzhou 310011, China)

 

Abstract: Land reclaimed by dredger soils can solve the land shortage and pollution of dredger soil. Consolidation characteristics of dredger soil were studied by model test with IFCO BAT-system and TDR system. The varieties of porosity, permeability, pore pressure and settlement were gained, and the relations among porosity, permeability and effective stress were also obtained. It is found that the relationships are similar to Tiller's model of dredger soil, and the parameters of Tiller's model are gained. Based on Gibson's theory and Tiller's model, consolidation model for dredger soil is gained under self-weight and vacuum pressure. With this model, pore pressure and consolidation degree are discussed during the consolidation. The model tests are analyzed, and the analytic results are close to the testing results.

Keywords: dredger-oil;self-eight;vacuum pressure;consolidation characteristic;ore pressure;effective stress;permeability coefficient;porosity;settlement

作者简介：林政,博士,高级工程师,Email：linz2004@gmail.com。

 

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