西宝高铁黄土地区路基振动效应空间分析研究
发布时间：2018-08-05 09:44
【摘要】：研究目的:伴随我国西部大开发、"一带一路"、"八横八纵"高速铁路网等重大工程战略的深入建设,西部黄土地区高速铁路、客运专线等高等级的轨道交通项目越来越多。为研究高速列车通过时对周边地面地层体的环境效应,本文选择某典型路基工程开展现场振动效应实测,分析振动沿地表、地下深度的强度、时程、频谱等空间特征,以期为同类工程设计和工程措施设置提供基础支持和理论借鉴。研究结论:(1)黄土地区高速列车运行产生的振动荷载,对周边地面地质体沿地表、地下深度产生空间环境效应;(2)列车引起的振动强度随距离增大、深度增加而衰减,衰减快慢在一定位置产生变化;沿水平、垂直方向振动强度与列车速度、列车轴重呈正比例关系,振动持续时间与列车长度呈正相关关系;振动频率分布沿地表与列车速度呈负相关关系,在垂直方向随深度增加越集中;(3)黄土的结构性、非均匀性,使得振动在局部位置产生反弹增大现象;(4)该研究成果可为高速铁路路基工程设计提供技术支持,并可为同类岩土工程建设提供理论借鉴。
[Abstract]:Research purpose: with the development of western China, "Belt and Road", "eight horizontal and eight vertical" high-speed railway network and other important engineering strategies, there are more and more high-grade rail transit projects such as high-speed railway, passenger dedicated line and so on in the loess region of western China. In order to study the environmental effect of high-speed train passing on the surrounding ground strata, this paper selects a typical subgrade engineering to carry out field vibration measurement, and analyzes the spatial characteristics of vibration along the surface and underground depth, such as intensity, time history, frequency spectrum, etc. In order to provide basic support and theoretical reference for similar engineering design and engineering measures. The conclusions are as follows: (1) the vibration load caused by high-speed train operation in loess region produces spatial environmental effects on the surrounding ground geological bodies along the surface and underground depth; (2) the vibration intensity induced by the train decreases with the increase of distance and depth. The vibration intensity along horizontal and vertical direction is proportional to train speed and train axle load, and the vibration duration is positively correlated with train length. The distribution of vibration frequency is negatively correlated with train velocity along the surface, and increases with depth in the vertical direction. (3) structural and non-uniformity of loess. (4) the research results can provide technical support for the design of high-speed railway subgrade engineering, and can provide theoretical reference for the similar geotechnical engineering construction.
【作者单位】： 中铁第一勘察设计院集团有限公司;
【基金】：国家自然科学基金项目(41272322):高速铁路列车特殊振动的地质环境效应及其成灾机理的研究 中铁第一勘察设计院集团有限公司院属科研课题“黄土地区高速铁路列车特殊振动的不良地质环境效应及其成灾机理研究”(院科13-11)
【分类号】：U213.1
[Abstract]:Research purpose: with the development of western China, "Belt and Road", "eight horizontal and eight vertical" high-speed railway network and other important engineering strategies, there are more and more high-grade rail transit projects such as high-speed railway, passenger dedicated line and so on in the loess region of western China. In order to study the environmental effect of high-speed train passing on the surrounding ground strata, this paper selects a typical subgrade engineering to carry out field vibration measurement, and analyzes the spatial characteristics of vibration along the surface and underground depth, such as intensity, time history, frequency spectrum, etc. In order to provide basic support and theoretical reference for similar engineering design and engineering measures. The conclusions are as follows: (1) the vibration load caused by high-speed train operation in loess region produces spatial environmental effects on the surrounding ground geological bodies along the surface and underground depth; (2) the vibration intensity induced by the train decreases with the increase of distance and depth. The vibration intensity along horizontal and vertical direction is proportional to train speed and train axle load, and the vibration duration is positively correlated with train length. The distribution of vibration frequency is negatively correlated with train velocity along the surface, and increases with depth in the vertical direction. (3) structural and non-uniformity of loess. (4) the research results can provide technical support for the design of high-speed railway subgrade engineering, and can provide theoretical reference for the similar geotechnical engineering construction.
【作者单位】： 中铁第一勘察设计院集团有限公司;
【基金】：国家自然科学基金项目(41272322):高速铁路列车特殊振动的地质环境效应及其成灾机理的研究 中铁第一勘察设计院集团有限公司院属科研课题“黄土地区高速铁路列车特殊振动的不良地质环境效应及其成灾机理研究”(院科13-11)
【分类号】：U213.1
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