乳化沥青级配碎石线下基础防冻层设计

乳化沥青级配碎石线下基础防冻层设计(任务书,开题报告,外文翻译,论文说明书18000字)
摘要
我国在近几年内，高速铁路的建设进度日新月异。随着高速铁路建设的加快，我们所面临的问题也随之而来。冻土地区的铁路建设技术，一直都不完善。而我国是世界上最主要的冻土国家，在冻土地区建设安全、快捷、稳定的铁路就成了我国铁路发展的必经之路。本文则通过对高速铁路线下基础设计防冻层分别设计防冻层和减振层来解决这一问题。对乳化沥青混凝土的材料特性进行分析，发现乳化沥青非常适合在冻土地区施工。使用合适乳化沥青特性的碎石级配防止乳化沥青在与碎石拌合时会产生严重下渗。通过制作马歇尔试件，用侧封式变水头渗透仪测出乳化沥青混凝土的渗透系数。同样通过变水头渗透仪测出间断密级配沥青混凝土的渗透系数。乳化沥青的渗透系数比间断密级配的沥青混凝土大，因此乳化沥青的冻胀率小于间断密级配的沥青混凝土。减振层则根据David Zeng对于改性沥青减振特性的研究，发现橡胶改性沥青的阻尼比高于其他三种材料2~4倍，而且在收到振动后基础的纵向峰值加速度和均方根加速度都小于其他材料。分别从减振层的厚度和宽度对振动衰减的影响两个方面来确定减振层的尺寸。通过有限元软件ABAQUS对所建立的模型进行计算分析其可行性。通过对模型的计算分析，发现计算结果可以复合规范要求。所以乳化沥青线下基础防冻层可以发挥其预期的效果。

关键词：高速铁路；乳化沥青；渗透系数；橡胶改性沥青；冻胀
 
Abstract
In recent years，China’s high-speed railway construction grows very fast. With the acceleration of high-speed railway construction, the problems we face are also followed. Frozen areas of railway construction technology, has been imperfect. And China is the world's most important frozen soil countries, in the frozen land to build a safe, fast and stable railway has become the only way to China's railway development. This paper addresses the problem by designing the insulation layer and the damping layer separately for the antifreeze layer design of the high-speed railway line. The analysis of the material properties of emulsified asphalt concrete shows that emulsified asphalt is very suitable for construction in frozen soil area.The analysis of the properties of the emulsified asphalt concrete uses the gravel gradation of the appropriate emulsified asphalt to prevent the emulsified asphalt from becoming heavily infiltrated when mixed with the gravel. The permeability coefficient of emulsified asphalt concrete was measured by using a side seal type water head osmometer. The permeability coefficient of asphalt concrete with dense intermittent gradation was also measured by variable head infiltration apparatus. The frost heave rate is analyzed by the comparison of the permeability coefficient to optimize the material of the insulation layer.The permeability coefficient of emulsified asphalt is larger than that of intermittent dense graded asphalt concrete, so the frost heave rate of emulsified asphalt is smaller than that of asphalt concrete with intermittent dense gradation.The damping layer is based on David Zeng's research on the vibration-damping characteristics of modified asphalt and found that the damping ratio of rubber-modified asphalt is 2 to 4 times higher than that of the other three materials, and the longitudinal peak acceleration and the mean square Root acceleration is less than other materials. The damper layer is based on David Zeng's study on the vibration characteristics of modified asphalt, and the size of the damper layer is determined from the two aspects of the thickness and width of the damper layer. The feasibility of the model is analyzed by finite element software ABAQUS. Through the calculation and analysis of the model, it is found that the calculation results can be combined with the specification requirements. So the base of the antifreeze layer under the emulsified asphalt line can exert its desired effect.
Keyword：High speed railway; Emulsified asphalt; Permeability coefficient; Rubber modified asphalt; Frost heave
 

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目录
摘要    I
Abstract    II
第1章绪论    1
1.1研究背景及意义    1
1.1.1 我国冻土地区及高速铁路的现状    1
1.1.2 “一带一路”中我国高速铁路的规划及前景    2
1.1.3冻胀的危害及研究的意义    3

1.2国内外研究及发展动态    4
1.2.1国内研究成果    4
1.2.2 国外研究成果    4
1.3研究内容及技术路线    5
1.3.1研究内容    5
1.3.2技术路线图    6
第2章沥青混凝土道床的减振层设计    7
2.1高速铁路振动的危害    7
2.2橡胶改性沥青混凝土作为减振层材料的优点    7
2.3改性沥青混凝土的设计原理    7
2.3.1改性沥青混凝土的振动原理    7
2.3.2改性沥青混凝土的振动衰减原理    9
2.4不同垫层材料对振动的影响    11
2.5轨道垫层厚度的设计    15
2.6轨道垫层宽度的设计    16
2.7本章小结    17
第3章沥青混凝土道床的防冻层设计    18
3.1 防冻层设计原理    18
3.2 乳化沥青混凝土与连续密级配沥青混凝土的简介    18
3.2.1乳化沥青混凝土简介    18
3.2.2  间断密级配沥青混凝土简介    19
3.3 乳化沥青混凝土渗透系数的测定    20
3.3.1 乳化沥青与集料的粘结原理    20
3.3.2 沥青乳液配制    21
3.3.3 乳化沥青混凝土基础配合比的确定    21
3.3.4 集料级配范围    22
3.3.5 乳化沥青混凝土渗透系数的测定    25
3.4 间断密级配沥青混凝土的渗透系数的测定    26
3.4.1 间断密级配沥青混凝土的介绍    26
3.4.2 间断密级配青混凝土的制备    26
3.4.3 间断密级配沥青混凝土渗透系数    27
3.4.4  结果分析    28
3.5乳化沥青混凝土防冻层尺寸的确定    29
3.6本章小结    30
第4章线下基础防冻层数值模拟可行性分析    31
4.1设计思路    31
4.2 ABAQUS软件原理简介    31
4.3模型可靠性的验证    31
4.4设计参数及设计原理    34 [资料来源：http://www.doc163.com]
4.5各层模型计算结果与分析    34
4.5.1 CA砂浆层底部    34
4.5.2改性沥青混凝土层底部    35
4.5.3乳化沥青混凝土层底部    36
4.5 本章小结    38
第5章结论与展望    39
5.1主要结论    39
5.2研究展望    39
参考文献    40
附录    43
致谢    44 [来源：http://Doc163.com]