本文選題：人工凍結(jié)法 + 單軸抗壓強(qiáng)度　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著天津地區(qū)地鐵建設(shè)的大規(guī)模推進(jìn),人工凍結(jié)法在盾構(gòu)進(jìn)出洞及聯(lián)絡(luò)通道開挖工程中的應(yīng)用得到廣泛應(yīng)用。但是針對天津地區(qū)不同土質(zhì)的人工凍土目前缺乏系統(tǒng)的試驗(yàn)研究,相關(guān)設(shè)計(jì)施工都是參照上海地區(qū)的規(guī)范和經(jīng)驗(yàn),不可避免的造成了一定的安全隱患和經(jīng)濟(jì)浪費(fèi)。本文結(jié)合天津地鐵5、6號線聯(lián)絡(luò)通道的建設(shè),對天津市市區(qū)范圍內(nèi)土層分布做了充分的調(diào)研,選取不同區(qū)域鉆孔,取樣基本包含了天津市所有的土層和土質(zhì)情況,通過室內(nèi)凍土實(shí)驗(yàn)對人工凍土的強(qiáng)度特性開展研究。第一章總結(jié)了人工凍結(jié)法在城市地鐵聯(lián)絡(luò)通道工程中的應(yīng)用概況,對人工凍土單軸抗壓強(qiáng)度特性、三軸抗剪強(qiáng)度特性、抗折強(qiáng)度特性以及凍結(jié)法聯(lián)絡(luò)通道開挖數(shù)值模擬的國內(nèi)外研究現(xiàn)狀進(jìn)行了調(diào)研,指出了本文研究的主要內(nèi)容。第二章開展了人工凍土單軸抗壓強(qiáng)度特性試驗(yàn)研究,給出不同溫度、不同土質(zhì)、不同含水量、不同含鹽量等條件下的單軸抗壓強(qiáng)度變化規(guī)律,對天津地區(qū)人工凍土的單軸無側(cè)限抗壓強(qiáng)度進(jìn)行了系統(tǒng)的分析研究。第三章進(jìn)行了人工凍土三軸抗剪強(qiáng)度特性試驗(yàn)研究,得到了不同土質(zhì)、不同溫度、不同含水量、不同含鹽量下的強(qiáng)度指標(biāo),為后文數(shù)值模擬的參數(shù)選取提供依據(jù)。第四章開展了人工凍土抗折強(qiáng)度特性試驗(yàn)研究,給出不同溫度、不同含水量下的抗折強(qiáng)度變化規(guī)律。實(shí)驗(yàn)采用新型試驗(yàn)設(shè)備,彌補(bǔ)了國內(nèi)外對該領(lǐng)域研究不足的空白,所得試驗(yàn)結(jié)果可為天津地區(qū)地下凍土工程的設(shè)計(jì)提供依據(jù)。第五章針對實(shí)際工程建立了ABAQUS二維有限元模型來模擬施工過程,模型參數(shù)的選取及結(jié)果對比分析以上文試驗(yàn)研究結(jié)果為依據(jù),從而使得數(shù)值模擬更加接近實(shí)際。
[Abstract]:With the development of subway construction in Tianjin area, artificial freezing method has been widely used in shield tunnel excavation. However, the artificial frozen soil of different soil quality in Tianjin is lack of systematic experimental research at present, and the related design and construction are all referring to the code and experience of Shanghai area, which inevitably leads to a certain safety hidden trouble and economic waste. In this paper, based on the construction of Tianjin Metro Line 5, 6, the distribution of soil layer in Tianjin urban area is investigated fully. Different regions are selected to drill holes. The sampling basically includes all soil layers and soil quality in Tianjin. The strength characteristics of artificial frozen soil were studied by indoor frozen soil experiment. The first chapter summarizes the application of artificial freezing method in urban subway communication channel engineering. The uniaxial compressive strength and triaxial shear strength of artificial frozen soil are analyzed. The characteristics of flexural strength and the current situation of numerical simulation of freezing contact channel excavation are investigated and the main contents of this paper are pointed out. In the second chapter, the uniaxial compressive strength of artificial frozen soil is studied, and the variation of uniaxial compressive strength under different temperature, different soil quality, different water content and different salt content is given. The uniaxial unconfined compressive strength of artificial frozen soil in Tianjin is studied systematically. In chapter 3, the experimental study on triaxial shear strength of artificial frozen soil is carried out, and the strength indexes of different soil quality, different temperature, different moisture content and different salt content are obtained, which provides the basis for the parameter selection of the later numerical simulation. In chapter 4, the experimental study on the flexural strength characteristics of artificial frozen soil is carried out, and the variation law of the flexural strength under different temperature and different moisture content is given. A new type of test equipment is used to make up for the lack of research in this field at home and abroad. The experimental results can provide a basis for the design of underground frozen soil engineering in Tianjin. In the fifth chapter, the ABAQUS two-dimensional finite element model is established to simulate the construction process. The selection of model parameters and the comparison of the results are based on the above experimental results, so that the numerical simulation is closer to reality.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU445

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李凱;程樺;;天津地鐵隧道修復(fù)工程凍土力學(xué)性能試驗(yàn)研究[J];安徽理工大學(xué)學(xué)報(自然科學(xué)版);2013年02期

2 高書豹;夏陽;曹小為;;某越江隧道超深聯(lián)絡(luò)通道凍結(jié)工程的數(shù)值模擬分析[J];河南城建學(xué)院學(xué)報;2012年03期

3 尹珍珍;陳有亮;王鵬;;上海人工凍結(jié)黏土單軸無側(cè)限抗壓強(qiáng)度試驗(yàn)研究[J];巖土力學(xué);2012年03期

4 趙景峰;;凍土抗拉強(qiáng)度與凍溫及含水率關(guān)系的試驗(yàn)研究[J];地質(zhì)與勘探;2011年06期

5 葉榮華;劉干斌;葉俊能;;寧波軌道交通人工凍土物理力學(xué)特性試驗(yàn)研究[J];工程勘察;2011年08期

6 王星童;趙維剛;;杭州地鐵凍結(jié)工程凍土力學(xué)特性試驗(yàn)研究[J];隧道建設(shè);2011年03期

7 齊吉琳;馬巍;;凍土的力學(xué)性質(zhì)及研究現(xiàn)狀[J];巖土力學(xué);2010年01期

8 張麗敏;李志軍;賈青;李廣偉;;人工淡水冰單軸壓縮強(qiáng)度試驗(yàn)研究[J];水利學(xué)報;2009年11期

9 陳有亮;王明;徐珊;常樂群;尹珍珍;;上海人工凍結(jié)軟黏土抗壓抗拉強(qiáng)度試驗(yàn)研究[J];巖土工程學(xué)報;2009年07期

10 李興龍;彭立敏;吳濤;翟旭東;;盾構(gòu)隧道聯(lián)絡(luò)通道施工力學(xué)行為數(shù)值模擬分析[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2009年04期

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本文編號：1851958