【摘要】：在我國內(nèi)蒙、新疆、東北等高緯度寒冷地區(qū),運營鐵路隧道病害尤其是滲漏水與凍害問題,一直是工程建設(shè)者與鐵路工務(wù)部門重點關(guān)注的對象。隧道常在春融期出現(xiàn)涌漏,滲漏水在冬季會引發(fā)各種凍害,如洞頂?shù)醣狻⑦厜毂�、道床結(jié)冰等。滲漏水與冰凍相互影響,互為因果,嚴(yán)重影響著混凝土結(jié)構(gòu)的使用壽命及行車安全。 本文在查閱了國內(nèi)外隧道病害整治資料的基礎(chǔ)之上,結(jié)合內(nèi)蒙地區(qū)集包鐵路八蘇木隧道病害整治的實際情況,對高寒地區(qū)隧道滲漏水及凍害整治技術(shù)展開研究。研究內(nèi)容及成果包括： ·在查閱大量隧道病害整治案例及成因分析基礎(chǔ)上,將八蘇木隧道病害劃分為襯砌結(jié)構(gòu)性病害、滲漏水病害、凍害三大類,并對各類病害情況進(jìn)行統(tǒng)計,結(jié)合統(tǒng)計資料分析各類病害產(chǎn)生原因。 ·采用三維CFD軟件對八蘇木隧道溫度場進(jìn)行數(shù)值模擬,分析通風(fēng)與否以及保溫層鋪設(shè)與否四種工況下隧道溫度場分布規(guī)律,得到已運營鐵路隧道冬季需防寒長度為800m左右,設(shè)置保溫層可避免圍巖中形成凍融圈,有效防止凍害。 ·采用ANSYS軟件對隧道保溫層鋪設(shè)與否兩種工況下圍巖與襯砌機(jī)構(gòu)的位移場與應(yīng)力場進(jìn)行模擬,分析隧道在鋪設(shè)保溫層后位移與應(yīng)力的變化,得到鋪設(shè)保溫層可有效減小圍巖及襯砌結(jié)構(gòu)應(yīng)力、位移的結(jié)論,同時指出對于襯砌面完整無破壞的區(qū)段,單一凍脹條件并不足以使其開裂。 ·對當(dāng)今國內(nèi)外常規(guī)隧道病害整治措施進(jìn)行總結(jié),介紹國內(nèi)前沿的“地?zé)嵩幢霉嵯到y(tǒng)”與“電伴熱系統(tǒng)”的試驗與應(yīng)用情況,分析其在隧道病害整治中的發(fā)展前景、適用性及優(yōu)缺點。 ·介紹電伴熱系統(tǒng)在八蘇木隧道凍害整治中的應(yīng)用,該方法在國內(nèi)尚處于探索實驗階段,總結(jié)該方法的優(yōu)缺點及使用效果,分析該方法的推廣使用價值與市場應(yīng)用前景,供廣大隧道工程界人士參考。
[Abstract]:In the cold regions of high latitudes such as Inner Mongolia, Xinjiang and Northeast China, railway tunnel diseases, especially leakage and freezing damage, have always been the focus of attention of project builders and railway and public works departments. During the spring thawing period, the tunnel will leak, and the leakage will cause various freezing damage in winter, such as the ice edge hanging from the top of the tunnel, the ice slide on the side wall, the ice formation on the pavement bed, and so on. Leakage and freezing affect each other and cause and effect each other seriously affecting the service life and driving safety of concrete structure. On the basis of consulting the data of tunnel disease treatment at home and abroad, combined with the actual situation of Baisumu tunnel disease treatment in Jibao railway in Inner Mongolia, this paper studies the leakage water and freezing damage remediation technology of tunnel in cold and alpine region. The research contents and results include: on the basis of consulting a large number of cases of tunnel disease treatment and cause analysis, the disease of Baisumu tunnel is divided into three categories: lining structural disease, leakage disease and freezing injury. The causes of all kinds of diseases are analyzed by statistics and statistical data. The temperature field of Baisumu tunnel is simulated by using 3D CFD software. By analyzing the distribution of tunnel temperature field under four working conditions, ventilation or not and whether the insulation layer is laid or not, it is obtained that the length of cold proof of the existing railway tunnel is about 800m in winter, and the freezing and thawing circle in surrounding rock can be avoided by setting the insulation layer. ANSYS software is used to simulate the displacement field and stress field of surrounding rock and lining mechanism under the two working conditions of tunnel insulation layer laying or not, and the variation of displacement and stress after the tunnel insulation layer is laid is analyzed. It is concluded that the stress and displacement of surrounding rock and lining structure can be effectively reduced by laying insulation layer. The single frost heaving condition is not enough to crack it. This paper summarizes the treatment measures of conventional tunnel diseases at home and abroad, and introduces the test and application of "geothermal source pump heating system" and "electric heat tracing system" at home and abroad. This paper analyzes the development prospect, applicability, advantages and disadvantages of the electric heat tracing system in the treatment of tunnel diseases. It introduces the application of the electric heat tracing system in the treatment of the freezing injury of the tunnel in Basumu. The method is still in the stage of exploration and experiment in our country. The advantages and disadvantages of the method and its application effect are summarized, and the popularizing and using value and market application prospect of the method are analyzed, which can be used as a reference for the people of tunnel engineering circles.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U457.2

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