大家好 铁路路基毕业论文怎么 写的 啊 ？

建议看看下面的资料网，在这里想要谁给现写一篇，可能不会有，因为z这里没人会为了这个区花费一些时间去写的，所以根据我搜集的一些网站来看，希望对你有所帮助，用心去做，不管毕业论文还是平时作业吗，我相信你都可以做好的。写作资料也很多，下面给你一些范文资料网：

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百万范文网： http://www.jiaoyuda.com 分类很细 栏目很多

毕业论文网 ： http://www.wendangtianxia.com 这个网站的论文都是以words的形式原封不动的打包上传的,百度里面收不到的

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范文网：www.fanwen.com

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中国知网： http://www.cnki.net
龙源数据库： http://www.qikan.com
万方数据库： http://www.wanfangdata.com
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中国总经理网论文集 http://www.cnceo.com/school
职业经理人论坛 http://mba.001.com.cn/mbamba.htm
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公开发表论文_深圳证券交易所 http://www.sse.orgs.cn/sse/yjkw/

中国路桥资讯网论文资料中心 http://www.lqzx.com/lunwen.htm
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论文统计 http://www.sci.com.cn/d
北京大学学位论文样本收藏 http://www.lib.pku.edu.cn

铁路路基填料的冻胀性分类研究

摘要 冻胀病害是寒区铁路路基特有的病害之一，因此，在寒区修筑铁路路J劫付， 除了要使基床符合一般地区的有关规定外，还应考虑冻结层上水的发育程度及填 料的冻胀敏感性。我国铁路部门目前采取的防治路基冻胀病害的措施是阻l上地表 水和地下水浸入路基本体，以及采用冻胀不敏感的填料。然而，从实用的角度出 发，冻土路基在设计中还有一些问题需要解决，如:填料冻胀敏感性如何确定， 哪些因素影响填料的冻胀，冻胀如何分级等，更进一步的要求则是如何从填料着 手，解决路基的冻胀病害。 结合这些问题，本论文做了以下工作: 1.通过分析国内外资料，确定影响路基冻胀的因素主要有土、水、温度、 盐、力。其中土主要指矿物成分、机械成分(粒径组成):水主要指土中水的含 量及补给情况;温主要指温度的高低及时空变化;盐主要指土中易溶thrtn的成分和 含量;力主要指对土施加荷载的大小、快慢和方式等。 2.结合室内试验，分析国内外土的冻胀分类常采用的冻胀敏感性划分方式、 冻胀分级方式，提出铁路路基填料冻胀性分类的划分及分级，并提出铁路路基填 料冻胀性分类方案。 冻胀分类采用土质和水分两个指标:土质对于粗粒土来说是指其内细颗粒 (<0.075mm)含量，细粒土则指土的塑性指数1P及液限， 这次填料分类方案采用冻高进行冻胀分级，共分四级，分别为I级冻胀、II 级冻胀、III级冻胀、W级冻胀，其所对应冻高分别为0-4mm, 5-24mm, 24-50mm, >50mm。 3.分析国内外防冻层的设计，结合填料分类方案以及我国铁路路基设计规 范，提出了我国铁路路基防冻胀结构措施。路基防冻措施如下: 根据铁路线路重要性在路基有害冻深范围内全部或部分填筑冻胀不敏感填 料; 当冻胀不敏感性填料不易获得时，可以考虑在路基中设置保温层，降低冻深 从而达到防治路基冻胀病害的目的。 关键词:路基冻胀分类防冻层 铁道科学研究院硕l二1学位论文 f.}}7 Abstract The frost heave is one of the railway subgrade unique diseases in cold area; therefore, when it is constructed in the cold area, the roadbed should not only conform to standard in warm zone, but also consider the impact of water in the frozen soils and the heave sensitivity of the filling. At present, the measure of preventing the embankment disease is to prevent the surface water and groundwater submerging into roadbed, as well as use the heave insensitive filling. However, when the applicability is considered, there is some problem which should be solved in design. For example: How to define the heave sensitivity? What is the factor affecting the heave? l low to divide the grade of the heave? And so on. There is more important that how to solve the problem of the roadbed by the way of changing filling. Based on these questions, the paper has done the work as follows: Firstly, through the domestic and foreign data analyzing, the factors influencing heave of the roadbed have been founded, including the soil, the water, the temperature, the saline matter, the external applied load and so on. The soil mainly refers to the mineral ingredient, the mechanical component (soil fraction); The water mainly refers to moisture content and the change of the moisture content; The temperature mainly refers to the change of the temperature and the temporal and spatial variation; The salt mainly refers to the ingredient of the soluble salt and the content; The external applied load refers to the load dimension, the speed and the way that applied to the subgrade and so on; Secondly, through the laboratory experiments, the paper has analyzed the classification way of the heave sensitivity, the heave graduation way which domestic and foreign often adopts about the soil heave classification, proposed the index mark that the filling heave classification and graduation of the roadbed, and the scheme of the filling heave classification; The index includes the soil and moisture content: the soil refers to the content of the silty and clayey (<0.075mm) for the coarse- grained soil heave and it refers to the plasticity index and liquid limit. The index mark which has been adopted by the filling classification plan is the heave high, it was divided four classes, they are I level, II level, III level, IV level, the 11.4 铁道科学研究院硕卜学位论义 介应夕 corresponding range of the frozen high score are 0-4min, 4-24mm, 24-50mm,> 50mm. Thirdly, through the domestic and foreign design information of antifreezing mixture analyzed, and bonded with the filling classification plan as well as the Code for Design of Rail Subgrade in our country, the measures of anti-heave structure of our railway roadbed have been proposed. The antifreezing measures are as follows: The depth of filling and the antifreezing grade should be determined according to ︸卜月︸卜曰 the importance of the railroad line, when the line is very important, there must insensitive filling in the whole freezing depth, on the contrary, there can hyposensitive filling or fill insensitive filling in the part of freezing depth. When the heave insensitive filling can not obtain easily, a heat insulating layer in subgrade can be installed, which can reduce the frozen depth to achieve the goal of reduce the heave disease. Key word: subgrade heave classification frost retarding layer

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