本文選題：試驗(yàn)方法 + 沉積固結(jié)　； 參考：《巖土工程學(xué)報(bào)》2017年03期

【摘要】：大變形自重固結(jié)理論可廣泛應(yīng)用于堆場(chǎng)設(shè)計(jì)和堆場(chǎng)吹填淤泥處理等方面,但對(duì)于沉積柱試驗(yàn)中淤泥的自重固結(jié)性質(zhì),尤其是非線性壓縮關(guān)系和非線性滲透關(guān)系,并沒有進(jìn)行詳細(xì)深入地研究。利用研制的沉積固結(jié)試驗(yàn)方法研究了太湖和白馬湖吹填淤泥的自重固結(jié)性質(zhì)。該方法由沉積柱、孔隙水壓力測(cè)試裝置和分層真空取樣裝置組成,利用該方法可得到淤泥自重固結(jié)過(guò)程中泥水界面、超靜孔隙水壓力、密度、有效應(yīng)力、顆粒分布、壓縮關(guān)系和滲透關(guān)系等參數(shù)的變化規(guī)律。壓縮關(guān)系試驗(yàn)結(jié)果表明:兩種淤泥壓縮關(guān)系是非線性的。在較低的有效應(yīng)力時(shí)隨有效應(yīng)力的增大孔隙比迅速減小,在較高的有效應(yīng)力時(shí)隨有效應(yīng)力的增大孔隙比減小趨勢(shì)趨緩。存在一個(gè)有效應(yīng)力的分界點(diǎn),低于此點(diǎn)不同時(shí)間時(shí)有效應(yīng)力與孔隙比的關(guān)系較為分散,此時(shí)淤泥的壓縮性很大,高于此點(diǎn)不同時(shí)間時(shí)有效應(yīng)力與孔隙比的關(guān)系可認(rèn)為是唯一的。兩種淤泥滲透關(guān)系是非線性的。淤泥的非線性壓縮關(guān)系和滲透關(guān)系可采用冪函數(shù)關(guān)系。
[Abstract]:The theory of self-gravity consolidation with large deformation can be widely used in the design of yard and the treatment of silt filling in the yard, but for the characteristics of self-gravity consolidation of silt in sediment column test, especially the nonlinear compression relation and nonlinear permeation relation. No detailed and in-depth study has been carried out. The self-weight consolidation properties of dredged silt in Taihu Lake and Baima Lake were studied by using the sedimentation consolidation test method developed in this paper. The method is composed of sedimentary column, pore water pressure test device and stratified vacuum sampling device. The mud water interface, excess pore water pressure, density, effective stress and particle distribution can be obtained by using this method during the process of self-consolidation of silt. The change rule of compression relation and permeability relation. The results of compression relation test show that the compression relationship of two kinds of silt is nonlinear. The void ratio decreases rapidly with the increase of effective stress at lower effective stress, and slows down with the increase of effective stress at higher effective stress. There is a dividing point of effective stress, and the relation between effective stress and void ratio is scattered at different time below this point. At this time, the compressibility of silt is very large, and the relation between effective stress and void ratio at different time is considered to be unique. The relationship between the two kinds of silt permeability is nonlinear. The nonlinear compression relation and permeability relation of silt can adopt power function relation.
【作者單位】： 國(guó)家海洋局南海規(guī)劃與環(huán)境研究院;重慶交通大學(xué)水利水運(yùn)工程教育部重點(diǎn)實(shí)驗(yàn)室;南京水利科學(xué)研究院巖土工程研究所;河海大學(xué)環(huán)境學(xué)院;河海大學(xué)地球科學(xué)與工程學(xué)院;
【基金】：重慶交通大學(xué)國(guó)家內(nèi)河航道整治工程技術(shù)研究中心暨水利水運(yùn)工程教育部重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(SLK2015B01) 國(guó)家自然科學(xué)基金項(xiàng)目(51209142;51278172)
【分類號(hào)】：TU41

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