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林政¹，趙智君²

（1 浙江省建筑設(shè)計(jì)研究院，杭州 310006； 2 浙江省超維建筑設(shè)計(jì)院，杭州 310011）

 

［摘要］利用吹填淤泥造地能夠解決建設(shè)用地緊缺及吹填淤泥對(duì)環(huán)境污染等問(wèn)題。聯(lián)合IFCO BAT系統(tǒng)和TDR系統(tǒng)，設(shè)計(jì)大型模型試驗(yàn)對(duì)吹填土在自重及真空負(fù)壓下固結(jié)特性進(jìn)行研究。試驗(yàn)得到吹填淤泥在固結(jié)過(guò)程中孔隙比、滲透系數(shù)、孔隙水壓力和土面沉降的變化情況，并整理得到孔隙比和滲透系數(shù)隨有效應(yīng)力的變化關(guān)系，發(fā)現(xiàn)與Tiller(1984,1985)模型接近，同時(shí)得到了Tiller模型中各項(xiàng)參數(shù)。還在Gibson一維大變形固結(jié)理論和Tiller模型基礎(chǔ)上建立了以有效應(yīng)力為控制變量的吹填淤泥在自重和負(fù)壓作用下的固結(jié)模型，并用差分法對(duì)其進(jìn)行求解。討論了孔隙水壓力在固結(jié)過(guò)程中的變化情況和固結(jié)度隨負(fù)壓的變化情況。最后，采用所提出的固結(jié)模型對(duì)吹填淤泥模型槽試驗(yàn)進(jìn)行了分析，理論計(jì)算結(jié)果與試驗(yàn)結(jié)果相近。

［關(guān)鍵詞］吹填淤泥;自重;負(fù)壓;固結(jié)特性;孔隙水壓力;有效應(yīng)力;滲透系數(shù);孔隙比;沉降

中圖分類(lèi)號(hào)：TU-472文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：林政,博士,高級(jí)工程師,Email：linz2004@gmail.com。

 

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