毕业论文--客运专线铁路沉降位移观测--.docVIP

摘要 为确保高速列车的行车安全，尽量满足旅客对舒适度的要求，并减少日常维修工作，客运专线路基工后沉降控制标准越来越高。本文主要介绍了铁路路基沉降的控制标准，影响铁路路基沉降的因素以及控制铁路路基沉降的控制方法。 建立了有限元模型，模拟逐级加荷条件下路基的沉降变形，为路基填筑施工控制提供了科学的参考；分析轨道与列车荷载特点，对轨道、列车荷载在稳定、沉降计算中的考虑方式与简化形式提出了建议，同时用分离式和复合模量两种方法对某高速铁路客运专线段复合地基加固路基在列车荷载作用下的沉降特性进行了有限元分析，计算结果验证了黄土复合地基刚度加固设计的可靠性；介绍了沉降设施的布置原则和技术要求及工后沉降量推算计算方法；以武广铁路客运专线实测数据为基础，分析了超载预压路基沉降规律及特征，总结了与之相适应的评估技术要求和经验；通过对各种基础形式的荷载传递特性、复合地基的形成条件等内容的研究，提出客运专线路基沉降控制分析应根据路堤基底垫层形式、加固桩的类型，采用复合地基或复合桩基理论进行；对管桩网结构复合地基的变形特征和影响因素进行了分析。 关键词：沉降控制；路堤填筑；列车荷载；超载预压；复合地基 Abstract To ensure high-speed train traffic safety, to meet the requirements of visitors comfort and reduce routine maintenance work: the controlling standards of the post— construction settlement of passenger dedicated line is increasingly . the article briefly introduces the standard of the control of the railway embankment settlement, the factors of affecting the railway embankment settlement and controlling methods for the settlement of the railway . The article establish finite element model to simulate the subgrade under the conditions of Progressive Loading Settlement , then provide a scientific reference for construction control of embankment filling . It analysises the characteristics of the track and the train loading , consider the form of recommendations on the track, the train load in the stability of settlement calculation and simplified way . At the same time it finite element analysis to a high-speed dedicated passenger railway embankment section of Composite Foundation under train load settlement characteristics with two ways separate and composite modulus . The results verify the loess composite foundation stiffness reliability of reinforcement . The article briefly introduces the foundation principles and technical requirements , and the amount of settlement . It analysises of the Settlement Law of surcharge preloading and features and summarizes the corresponding assessment of technical requirements and experience based on the dedicated to t