【摘要】：鹽水凍結(jié)是地層止水和加固方法之一,但是含地下水流飽和砂層凍結(jié)時(shí)凍結(jié)壁發(fā)展緩慢甚至不交圈,而液氮凍結(jié)可以快速解決地下水流問題。本文結(jié)合市政工程中經(jīng)常采用布孔形式,以飽和砂滲流地層的人工凍結(jié)過程作為研究對(duì)象,采用數(shù)值模擬和物理試驗(yàn)兩種研究方法對(duì)滲流作用下液氮凍結(jié)溫度場發(fā)展規(guī)律進(jìn)行系統(tǒng)研究�？紤]到液氮溫度的不均勻性,通過數(shù)值模擬研究管壁溫度分布情況,并結(jié)合實(shí)際情況建立Comsol計(jì)算模型。通過偏微分方程實(shí)現(xiàn)滲流場與溫度場的耦合。通過單管計(jì)算結(jié)果得出不同流速與管壁溫度在地下水流作用下液氮凍結(jié)溫度場發(fā)展規(guī)律;通過典型參數(shù)分析,得出四根凍結(jié)管在滲流作用下的凍結(jié)規(guī)律;通過單因素分析研究地下水流速、凍結(jié)管間距、管壁溫度以及水流溫度對(duì)凍結(jié)溫度場的影響;運(yùn)用正交試驗(yàn)研究各因素對(duì)液氮凍結(jié)滲流溫度場和交圈時(shí)間的影響顯著性。根據(jù)相似準(zhǔn)則,進(jìn)行物理試驗(yàn)研究得出各測點(diǎn)溫度變化情況,依據(jù)測點(diǎn)溫度求出凍結(jié)壁厚度變化規(guī)律。根據(jù)試驗(yàn)中測得的管壁溫度通過相似準(zhǔn)則還原到原型進(jìn)行數(shù)值模擬,得出結(jié)果與物理試驗(yàn)進(jìn)行對(duì)照驗(yàn)證數(shù)值模擬的可靠性。
[Abstract]:Salt water freezing is one of the methods to stop water and reinforce the formation, but the freezing wall develops slowly or even does not cross the circle when the saturated sand layer with groundwater flow is frozen, and liquid nitrogen freezing can solve the problem of groundwater flow quickly. In this paper, the artificial freezing process of saturated sand percolation formation is often used in municipal engineering. The development of liquid nitrogen freezing temperature field under seepage is studied systematically by numerical simulation and physical test. Considering the inhomogeneity of liquid nitrogen temperature, the temperature distribution of pipe wall was studied by numerical simulation, and the Comsol calculation model was established according to the actual situation. The coupling of seepage field and temperature field is realized by partial differential equation. The development law of liquid nitrogen freezing temperature field under the action of groundwater flow with different velocity of flow and tube wall temperature is obtained by single pipe calculation, and the freezing law of four freezing tubes under seepage is obtained through the analysis of typical parameters. The effects of the flow velocity of groundwater, the spacing of freezing tubes, the temperature of pipe wall and the temperature of water flow on the freezing temperature field were studied by single factor analysis, and the effects of these factors on the temperature field and intersecting time of liquid nitrogen freezing seepage were studied by orthogonal test. According to the similarity criterion, physical experiments were carried out to obtain the temperature variation of each measuring point, and the variation law of freezing wall thickness was obtained according to the temperature of the measuring point. According to the measured wall temperature in the experiment, the tube wall temperature is reduced to the prototype by similarity criterion, and the results are compared with the physical test to verify the reliability of the numerical simulation.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU99

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 胡向東;韓延廣;虞興福;;雙排管凍結(jié)穩(wěn)態(tài)溫度場廣義解析解[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年03期

2 胡俊;楊平;;大直徑杯型凍土壁溫度場數(shù)值分析[J];巖土力學(xué);2015年02期

3 馮梅梅;楊維好;高娟;;含裂隙構(gòu)造滲流地層人工凍結(jié)壁發(fā)育及影響因素分析[J];采礦與安全工程學(xué)報(bào);2014年06期

4 杜艷珍;舒曉;張甲;;基于格子玻爾茲曼方法的多孔介質(zhì)滲流模擬[J];石油化工應(yīng)用;2014年04期

5 高書豹;曹小為;;液氮凍結(jié)技術(shù)在盾構(gòu)井二次封水中的應(yīng)用[J];工程與建設(shè);2014年02期

6 徐軼;徐青;;基于COMSOL Multiphysics的滲流有限元分析[J];武漢大學(xué)學(xué)報(bào)(工學(xué)版);2014年02期

7 石榮劍;岳豐田;張勇;陸路;;斜井液氮補(bǔ)強(qiáng)凍結(jié)溫度場分布特征[J];巖石力學(xué)與工程學(xué)報(bào);2014年03期

8 胡向東;郭旺;張洛瑜;;直角絕熱邊界附近少量凍結(jié)管穩(wěn)態(tài)溫度場解析解[J];浙江大學(xué)學(xué)報(bào)(工學(xué)版);2014年03期

9 胡向東;任輝;;3排管凍結(jié)梯形-拋物弓疊合等效溫度場模型和平均溫度[J];煤炭學(xué)報(bào);2014年01期

10 高娟;馮梅梅;高乾;;地鐵聯(lián)絡(luò)通道凍結(jié)施工的熱-流-固(THM)耦合分析[J];冰川凍土;2013年04期

相關(guān)會(huì)議論文 前2條

1 周曉敏;郭永富;趙志福;;滲流作用下豎井凍結(jié)壁形成規(guī)律的仿真研究[A];礦山建設(shè)工程新進(jìn)展——2006全國礦山建設(shè)學(xué)術(shù)會(huì)議文集（上冊(cè)）[C];2006年

2 董志秋;;地下動(dòng)水對(duì)地層凍結(jié)的影響及預(yù)防措施[A];地層凍結(jié)工程技術(shù)和應(yīng)用——中國地層凍結(jié)工程40年論文集[C];1995年

相關(guān)博士學(xué)位論文 前1條

1 魯建華;基于格子Boltzmann方法的多孔介質(zhì)內(nèi)流動(dòng)與傳熱的微觀模擬[D];華中科技大學(xué);2009年

相關(guān)碩士學(xué)位論文 前2條

1 高娟;裂隙巖體凍結(jié)溫度場與滲流場耦合作用機(jī)理及應(yīng)用研究[D];中國礦業(yè)大學(xué);2014年

2 鄧平平;基于格子Boltzmann方法的二維多孔介質(zhì)滲流研究[D];大連理工大學(xué);2014年

，

本文編號(hào)：2200236