高速铁路论文：高速铁路线下工程变形观测及评估技术研究.doc

高速铁路论文：高速铁路线下工程变形观测及评估技术研究【中文摘要】高速铁路线下结构沉降变形量级较小,最大沉降量通常只比沉降观测精度大一个数量级,且相对波动较大,因此,实测数据的微小波动会对预测结果产生较大的影响,在软土地基等较大变形的沉降预测中得到广泛应用的曲线拟合法是否适用于这种“小量值、大波动”的情形、预测结果及各项参数指标是否能满足评估细则的要求都还有待于研究。本文依托京沪高速铁路沉降变形分析评估项目,针对高速铁路线下结构沉降变形“小量值、大波动”的特征,采用京沪高速铁路沉降变形观测数据,探讨了四种常用沉降预测方法在高速铁路中的适用性,并在此基础上对现有的评估细则作出了适当的补充,最后介绍了一种适用于高速铁路变形特点的沉降预测方法“变形过程指数法”。归纳起来,本文的主要内容和成果如下：1.较为详细的介绍了高速铁路线下工程变形观测及评估分析的技术要求；2.通过对京沪高速铁路现有变形观测资料的分析,总结提出了高速铁路线下结构的沉降变形特征,并在此基础上对评估细则作出了适当的补充；3.对双曲线法、指数曲线法、Asaoka法和灰色理论法这四种常用沉降预测方法在高速铁路中的适用性进行了对比分析,并在此基础上提出了更适合于京沪高速铁路沉降变形特征的相关系数要求；4.介绍了一种适用于高速铁路变形特点的沉降预测方法“变形过程指数法”,并验证了其适用性。【英文摘要】The settlement of high-speed railway line structure is a small order of magnitude, usually the largest settlement is an order of magnitude bigger than the settlement observation precision, and relatively volatile, so small fluctuations in the measured data would have predicted a greater impact, whether the curve fitting methods which have been widely used in the soft and other large land-based settlement prediction of deformation applied to such “small magnitude, large fluctuations” situation, forecast results and the parameters of evaluation indicators can meet the requirements of rules are yet to be studied.This paper relies on analysis of the Beijing-Shanghai high-speed railway settlement assessment project, in connection with the high-speed rail line settlement “small magnitude, large fluctuations” characteristics, using the Beijing-Shanghai high-speed railway settlement deformation observation data, four commonly used settlement prediction methods The applicability of high-speed railway, and on this basis, the assessment of existing rules to make the appropriate supplement, and finally introduces a settlement prediction method which is suitable to high-speed railway deformation characteristics-” index of the deformation process(exponential curve method)”.To sum up, the main contents and results of this paper is as follows:1. More detailed description of the high-speed railway line deformation observation and assessment of technical requirements analysis;2. Through analysis of the deformation data of Beijing-Shanghai high-speed railway,the thesis summarized high-speed rail line proposed settlement structure characteristics, and on this basis, the assessment made by the appropriate supplementary rules;3. Comparative analysis of the applicability of four common settlement prediction methods-hyperbolic, exponential curve, Asaoka method and gray theory method in high-speed railway, and on this basis, more suitable correlation coefficients requirement is proposed for Beijing-Shanghai high-speed railway settlement characteristics;4. Introduces an appropriate settlement prediction method-”index of the deformation process(exponential curve method)” for high-speed railway deformation characteristics, and verify its applicability.【关键词】高速铁路 沉降评估 变形特征 沉降预测方法 变形过程指数法【英文关键词】high-speed railway settlement evaluation deformation characteristics settlement prediction methods index of the deformation process(exponential curve method)【目录】高速铁路线下工程变形观测及评估技术研究摘要6-7Abstract7第1章 绪论11-181.1 引言11-121.2 选题的研究意义121.3 国内外沉降预测的研究现状12-161.3.1 理论计算方法12-131.3.2 数值计算方法13-141.3.3 实测数据反推法14-161.4 本文主要研究内容、方法及目标16-18第2章 各线下工程的变形观测技术要求18-292.1 路基工程沉降变形观测技术要求18-212.1.1 观测断面及观测点的设置原则18-192.1.2 观测元件与埋设技术要求19-202.1.3 观测技术要求20-212.2 桥涵工程沉降变形观测技术要求21-272.2.1 观测点的设置原则21-232.2.2 观测元件与埋设技术要求23-242.2.3 观测技术要求24-272.3 隧道工程沉降变形观测技术要求27-282.3.1 观测断面和观测点的设置原则272.3.2 观测元件与埋设技术要求272.3.3 观测技术要求27-282.4 过渡段工程沉降变形观测技术要求282.4.1 观测断面和观测点的设置原则282.4.2 观测元件与埋设技术要求282.4.3 观测技术要求282.5 本章小结28-29第3章 各线下工程的沉降评估技术要求29-403.1 路基工程沉降评估29-363.1.1 判定标准293.1.2 评估方法29-363.1.3 工后沉降的计算363.1.4 计算沉降和观测沉降的比较363.2 桥涵工程沉降评估36-383.2.1 判定标准36-373.2.2 评估方法37-383.3 隧道工程沉降评估383.3.1 判定标准383.3.2 评估方法383.4 过渡段工程沉降评估383.4.1 判定标准383.4.2 评估方法383.5 区段工程综合评估38-393.6 本章小结39-40第4章 京沪高铁沉降变形特征分析及评估细则优化探讨40-534.1 概述40-424.1.1 评估依据404.1.2 工程概况与地形地质概况40-424.2 路基沉降变形特征分析42-454.2.1 路基累计沉降量统计42-434.2.2 路基填筑完成后沉降量和沉降速率统计43-444.2.3 路基重要问题说明44-454.2.4 暴雨对路基沉降的影响454.3 桥梁沉降变形特征分析45-504.3.1 桥梁墩台累计沉降统计45-464.3.2 架梁前后墩台沉降变形情况46-504.4 涵洞沉降变形特征分析504.4.1 涵洞观测时间统计504.4.2 涵洞累计沉降统计504.5 隧道沉降变形特征分析50-514.5.1 隧道观测持续时间统计50-514.5.2 隧道累计沉降统计514.6 评估细则优化探讨51-524.7 本章小结52-53第5章 四种常用沉降预测法在高速铁路中的适用性分析53-615.1 分析方法53-545.2 四种预测方法的适用性分析54-565.2.1 双曲线法545.2.2 指数曲线法54-555.2.3 Asaoka法55-565.2.4 灰色理论法565.3 四种预测方法的对比分析56-605.4 本章小结60-61第6章