高寒地区运营铁路隧道渗漏水及冻害整治技术研究
发布时间：2018-08-08 18:09
【摘要】：在我国内蒙、新疆、东北等高纬度寒冷地区,运营铁路隧道病害尤其是渗漏水与冻害问题,一直是工程建设者与铁路工务部门重点关注的对象。隧道常在春融期出现涌漏,渗漏水在冬季会引发各种冻害,如洞顶吊冰棱、边墙挂冰溜、道床结冰等。渗漏水与冰冻相互影响,互为因果,严重影响着混凝土结构的使用寿命及行车安全。 本文在查阅了国内外隧道病害整治资料的基础之上,结合内蒙地区集包铁路八苏木隧道病害整治的实际情况,对高寒地区隧道渗漏水及冻害整治技术展开研究。研究内容及成果包括： ·在查阅大量隧道病害整治案例及成因分析基础上,将八苏木隧道病害划分为衬砌结构性病害、渗漏水病害、冻害三大类,并对各类病害情况进行统计,结合统计资料分析各类病害产生原因。 ·采用三维CFD软件对八苏木隧道温度场进行数值模拟,分析通风与否以及保温层铺设与否四种工况下隧道温度场分布规律,得到已运营铁路隧道冬季需防寒长度为800m左右,设置保温层可避免围岩中形成冻融圈,有效防止冻害。 ·采用ANSYS软件对隧道保温层铺设与否两种工况下围岩与衬砌机构的位移场与应力场进行模拟,分析隧道在铺设保温层后位移与应力的变化,得到铺设保温层可有效减小围岩及衬砌结构应力、位移的结论,同时指出对于衬砌面完整无破坏的区段,单一冻胀条件并不足以使其开裂。 ·对当今国内外常规隧道病害整治措施进行总结,介绍国内前沿的“地热源泵供热系统”与“电伴热系统”的试验与应用情况,分析其在隧道病害整治中的发展前景、适用性及优缺点。 ·介绍电伴热系统在八苏木隧道冻害整治中的应用,该方法在国内尚处于探索实验阶段,总结该方法的优缺点及使用效果,分析该方法的推广使用价值与市场应用前景,供广大隧道工程界人士参考。
[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.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U457.2
本文编号：2172603
[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.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U457.2
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