本文關(guān)鍵詞：非飽和土土水特性曲線與滲透系數(shù)試驗(yàn)研究　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 非飽和土 基質(zhì)吸力 飽和度 土水特性曲線 滲透系數(shù) 試驗(yàn)驗(yàn)證

【摘要】：現(xiàn)有的土力學(xué)理論體系中,大部分理論都是在假設(shè)土體為飽和土的基礎(chǔ)上建立的,即認(rèn)為土只由土骨架和孔隙水組成。而在實(shí)際工程中所接觸的土,大部分為三相土,即除土骨架和孔隙水之外,還有氣相的存在。這樣的土被稱為非飽和土。針對非飽和土的各方面特性的研究是目前巖土工程學(xué)界的一個重要課題。本文在前人已有的理論成果的基礎(chǔ)上,對非飽和土的滲流特性進(jìn)行了試驗(yàn)研究。 土水特性曲線與滲透系數(shù)是非飽和土滲流研究當(dāng)中非常重要的內(nèi)容。本文對土水特性曲線與滲透系數(shù)的意義、特性與應(yīng)用進(jìn)行了介紹,并總結(jié)了前人獲取非飽和土土水特性曲線與滲透系數(shù)的試驗(yàn)及理論方法。在此基礎(chǔ)上,本文應(yīng)用大連理工大學(xué)巖土與環(huán)境力學(xué)實(shí)驗(yàn)室自主研發(fā)的非飽和土土水特性曲線與滲透系數(shù)聯(lián)合測量儀,對非飽和黃土與硅微粉的滲透特性進(jìn)行了試驗(yàn)研究,并得到相應(yīng)的土水特性曲線與滲透系數(shù)。根據(jù)試驗(yàn)結(jié)果對土水特性曲線進(jìn)行了VG模型擬合,闡述了非飽和土的滲透系數(shù)與基質(zhì)吸力以及土體飽和度之間的變化關(guān)系。通過對比兩種土的試驗(yàn)結(jié)果,結(jié)合其各自基本物理特性,尤其是顆粒組成情況,討論了粒徑不同對滲透特性的影響。 本文還從孔隙水的平衡方程出發(fā),結(jié)合非飽和土中土水間相互作用力理論,對非飽和土中孔隙水滲流運(yùn)動方程與滲透系數(shù)的理論公式進(jìn)行了推導(dǎo)。并根據(jù)滲透試驗(yàn)研究的數(shù)據(jù)結(jié)果對非飽和土滲透系數(shù)的理論公式進(jìn)行了驗(yàn)證,確定了其合理性。
[Abstract]:In the existing soil mechanics theory system, most of the theories are based on the assumption that the soil is saturated soil, that is, the soil is only composed of soil skeleton and pore water. Most of them are three-phase soil, that is, except soil skeleton and pore water. There is also the existence of gas phase. Such soil is called unsaturated soil. The study of various characteristics of unsaturated soil is an important subject in geotechnical engineering. This paper is based on the previous theoretical results. The seepage characteristics of unsaturated soil are studied experimentally. Soil-water characteristic curve and permeability coefficient are very important in the study of unsaturated soil seepage. The significance, characteristics and application of soil-water characteristic curve and permeability coefficient are introduced in this paper. The experimental and theoretical methods for obtaining the characteristic curve and permeability coefficient of unsaturated soil were summarized. In this paper, the permeation characteristics of unsaturated loess and silicon powder were studied by using the instrument of unsaturated soil water characteristic curve and permeability coefficient developed by the laboratory of geotechnical and environmental mechanics of Dalian University of Technology. The corresponding soil-water characteristic curve and permeability coefficient were obtained. According to the test results, the soil-water characteristic curve was fitted by VG model. The relationship between the permeability coefficient of unsaturated soil and the matrix suction and the saturation of soil is expounded. By comparing the experimental results of the two soils and combining their respective basic physical characteristics, especially the particle composition. The influence of particle size on permeability was discussed. Based on the equilibrium equation of pore water and the theory of interaction between soil and water in unsaturated soil, this paper also discusses the relationship between soil and water. The equation of porous water seepage and the theoretical formula of permeability coefficient in unsaturated soil are deduced, and the theoretical formula of permeability coefficient of unsaturated soil is verified according to the data of permeation test. The rationality is determined.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 戚國慶,黃潤秋;土水特征曲線的通用數(shù)學(xué)模型研究[J];工程地質(zhì)學(xué)報(bào);2004年02期

2 李志清;李濤;胡瑞林;李熊;李壯舉;;非飽和土土水特征曲線(SWCC)測試與預(yù)測[J];工程地質(zhì)學(xué)報(bào);2007年05期

3 殷宗澤;土力學(xué)學(xué)科發(fā)展的現(xiàn)狀與展望[J];河海大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年01期

4 趙永富;田恩龍;張國棟;;達(dá)西定律與滲流控制[J];黑龍江水利科技;2008年04期

5 梁愛民;劉瀟;;非飽和土滲透系數(shù)的試驗(yàn)研究[J];井岡山大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年02期

6 張吉明;李順群;任慶新;;非飽和土的基質(zhì)吸力與毛細(xì)吸力[J];山西建筑;2007年23期

7 吳元莉;項(xiàng)偉;趙冬;;非飽和馬蘭黃土土-水特征曲線研究[J];安全與環(huán)境工程;2011年04期

8 龔壁衛(wèi),劉艷華,詹良通;非飽和土力學(xué)理論的研究意義及其工程應(yīng)用[J];人民長江;1999年07期

9 邵龍?zhí)?相間相互作用原理與土壤水動力學(xué)基本方程[J];水科學(xué)進(jìn)展;2002年05期

10 鄭衛(wèi)鋒,洪帥,邵龍?zhí)?陳繼光,張?jiān)?精密水壓力發(fā)生器的研制與應(yīng)用[J];實(shí)驗(yàn)力學(xué);2003年03期

相關(guān)博士學(xué)位論文 前3條

1 梁愛民;非飽和土壤滲透特性及飽和入滲機(jī)理試驗(yàn)研究[D];大連理工大學(xué);2008年

2 張雪東;土水特征曲線及其在非飽和土力學(xué)中應(yīng)用的基本問題研究[D];北京交通大學(xué);2010年

3 侯龍;非飽和土孔隙水作用機(jī)理及其在邊坡穩(wěn)定分析中的應(yīng)用研究[D];重慶大學(xué);2012年

，

本文編號：1395243