西南交通大学本科毕业设计（论文） 第IV页
摘 要
路基工程作为铁道工程中的基础性工程，在铁路建设的发挥着极其重要的作用，所以理应引起设计者和建设者的高度重视。本论文以新建沪昆线高速铁路为工程背景，沪昆铁路是东西跨度最长的铁路，沪昆线的建成必将会极大地带动铁路沿线的经济发展，促进我国东西部之间的交流，方便人们的出行。沪昆铁路的全程均为电气化铁路，设计的速度为350公里/小时。
本设计通过查阅大量相关文献资料，根据线路纵断面图、线路平面图、代表性横断面及该区段的地形条件及地质状况，主要进行了以下几方面的工作。首先，根据铁路路基工程规范设计路基本体，并对路基填料及其压实标准做出了相应说明，由于水的存在将会对路基的稳定性造成极大的危害，在本设计中对排出地表水及地下水都采取了相应的措施。其次，路堑地段边坡高度较高处需要进行边坡稳定性分析计算，并对边坡稳定性不满足要求的地段按规定设置支挡结构，地层工程性质较差处要进行地基处理设计；同时，在设计中也要对路基边坡采取相应的防护措施，防护边坡受冲刷的同时还能美化环境；最后，根据路基的代表性横断面计算出土石方的填挖方量并做出合理调配。
关键词 高速铁路；路基支挡；地基处理；边坡防护
西南交通大学本科毕业设计（论文） 第V页
Abstract
As railway subgrade foundation engineering projects in railway construction play an extremely important role, so should lead designer and builder's attention. In this thesis, the new Shanghai-Kunming high-speed railway line engineering background,
Shanghai-Kunming Railway is the longest railway span of things, the completion of the Shanghai-Kunming line will certainly greatly promote economic development along the railway line, to promote exchanges between east and west China, convenient for people to travel. Shanghai-Kunming railway line was electrified railway, the design speed of 350 km / h.
This design by referring to a large number of relevant literature, according to the line profile view, track plan, a representative cross-section of the geological and topographical conditions and the condition of the segment, mainly for the following aspects of the work. First, according to the railway embankment road engineering design specification basic body, and subgrade compaction standard packing and made the appropriate instructions, due to the presence of water will cause great harm to the stability of the embankment, in the design of the surface of the discharge water and groundwater have taken appropriate measures. Second, cutting the lot needs to be higher up the slope height slope stability analysis and calculation, and the lot does not meet the requirements of slope stability requirements set by retaining structures, poor strata of the nature of the works to be carried out ground treatment design; while , have taken in the design of the embankment slope appropriate protective measures, while the slope protection by erosion but also beautify the environment; Finally, according to a representative cross-section of embankment fill to calculate the amount of earthwork and excavation made rationally. Keywords high-speed-railway; subgrade settlement; slope-protection
西南交通大学本科毕业设计（论文） 第VI页
目录
第1章 绪论 ......................................................................................................................... 1
1.1 高速铁路路基工程概要 ........................................................................................ 1 1.2 设计背景 ................................................................................................................ 2 1.3 地质构造 ................................................................................................................ 2 1.4 设计任务及意义 .................................................................................................... 3 2.1 路基横断面形式 .................................................................................................... 4 2.2 路基本体构造 ....................................................................................................... 5
2.2.1 路基面 ......................................................................................................... 6 2.2.2 路肩 ............................................................................................................. 6 2.2.3 基床 ............................................................................................................. 6 2.2.4 边坡 ............................................................................................................. 8 2 2 5 基底 .............................................................................................................. 9
第3章 路基排水设计 ....................................................................................................... 10
3.1 水的危害及排水的必要性 .................................................................................. 10 3.2 地面排水 .............................................................................................................. 10 3.3 地下排水 .............................................................................................................. 12 第4章 地基处理设计 ....................................................................................................... 13
4.1 地基处理概述 ...................................................................................................... 13 4.2 水泥粉煤灰碎石桩（CFG桩） ........................................................................... 14
4.2.1 CFG桩概述 ................................................................................................. 14 4.2.2 CFG桩的作用机理 ..................................................................................... 14
4.2.3 CFG桩设计计算 ......................................................................................... 15 第5章 边坡支挡结构设计 ............................................................................................... 21
5.1 支挡结构概述 ...................................................................................................... 21 5 2 支挡结构分类 ...................................................................................................... 21
西南交通大学本科毕业设计（论文） 第VII页
5 2 1 重力式挡土墙 ............................................................................................ 22 5.2.2 抗滑桩 ....................................................................................................... 24
第6章 路基边坡防护设计 ............................................................................................... 33
6.1 边坡防护工程概述 .............................................................................................. 33 6.1.1 植被防护 ................................................................................................... 33
6.1.2 圬工防护 ................................................................................................... 33
第7章 路基土石方调配 ................................................................................................... 35
7.1 路基土石方调配概述 .......................................................................................... 35 7.2 区间路基土石方调配 .......................................................................................... 35
7.2.1区间路基土石方调配原则 ........................................................................ 35 7.2.2 区间土石方调配原理及方法 ................................................................... 36
结论 ..................................................................................................................................... 39 致谢 ..................................................................................................................................... 40 参考文献 ............................................................................................................................. 41
