摘要：在实际铁路的运营中，CRTSII型轨道板应用广泛，尤其是在高速铁路线上。但是CRTSII型轨道板在实际应用中也出现很多病害情况，在温度变化大的地区，尤其是以轨道板宽窄接缝处的上拱、裂缝较为常见。由于这种病害出现越来越多，所以急需对此病害作出针对性实验，来了解此病害的具体成因，通过实验找出针对性整治方案，确保高铁线路安全运行。本文结合现有实验研究材料和实地调研的高铁线路运行情况，设计了CRTSII型板式轨道屈曲模型实验平台。本实验平台适用于轨道板模型，主要以限制轨道板纵向温度力为主。方案一是以钢结构为主的自反力架，利用钢材料的自身强度，形成自反力结构。以钢轨为基座，上部焊接斜支撑，形成反力架。方案二是一反力挡土墙结构为主，利用地基土和挡土墙结构的强度，形成自反力平台。主要利用了挡土墙的土压力。

关键词：CRTSII型板式轨道板；轨道板模型试验；自反力

Design of nonlinear buckling model test platform for CRTS II slab track

Abstract：In the actual railway operation, the CRTSII track slab is widely used, especially on the high speed railway line. However, there are many diseases in the practical application of CRTSII track slab. In the areas with large temperature changes, the upper arch and cracks at the narrow and narrow joints of track slab are more common. Because of this increasing number of diseases, it is urgent to make targeted experiments on this disease to understand the specific causes of this disease. Through experiments to identify targeted remediation programs to ensure the safe operation of high-speed rail lines.Based on the existing experimental research materials and the high-speed rail lines running on the spot, a CRTSII plate track buckling model experimental platform is designed.The experimental platform is suitable for track slab model to limit longitudinal temperature force of track slab.The first one is the self reaction frame which is mainly composed of steel structure, which uses the self strength of steel material to form the structure of reflexive force. The rail is used as the base, and the upper part is welded with inclined support to form a reaction frame.Plan two is a counterforce retaining wall structure, which uses the strength of foundation soil and retaining wall structure to form a platform of reflexive force. The earth pressure of the retaining wall is mainly used.

Key words:  CRTSII type slab track slab; track slab model test; reflexive force

目录

第1章绪论 4

1.1设计背景 4

1.2设计目的 5

1.3设计原则 6

第2章设计方案 6

2.1轨道板模型 6

2.2设计方案设想 9

2.2.1方案一钢结构反力架 9

2.2.2方案二反力挡土墙 10

第3章实验方案相关检算 11

3.1方案一钢结构反力架 11

3.1.1方案要点 11

3.1.2方案相关计算 11

3.1.3反力平台设计 15

3.2方案二反力挡土墙 20

3.2.1方案要点 20

3.2.2方案检算 20

3.2.3反力平台设计 23

3.3方案比选 28

第4章总结 28

致谢 28

参考文献 29

第1章绪论

1.1设计背景

高速铁路是推动我国发展的一项重要保障，是我国众多基础设施建设中比较重要的一个组成部分。在我国的高铁线路上，由于CRTSII型轨道板性能优良，所以CRTSII型无砟轨道轨道系统被广泛采用。

目前，国内外轨道结构仍然在采用比较传统的有砟轨道系统。但是，近年来无砟轨道结构越来越得到重视。无砟轨道系统的优势很多，比如维修较少，轨道结构轻，可靠性高，建筑高度低等等。无咋轨道在选线方面也占有优势，如德国的科隆-法兰克福的高速无砟轨道最小曲线半径3350m，线路最大坡度为40‰。虽然前期铺设的费用大，但从整个使用周期来讲，具有竞争性，适用于高速，重载运量高的线路。当综合考虑整个使用周期费用，施工时间可靠性和耐久性等因素时，无砟轨道结构具有相当的优势。