京津城际铁路沿线不均匀地面沉降演化特征

发布时间：2018-10-26 17:01

【摘要】：北京-天津(京津)城际铁路经过地面沉降漏斗边缘,其安全运营随着不均匀沉降的增加而威胁增加。采用时序干涉测量技术监测铁路沿线地表形变,结合剖面分析与时序分析方法探讨其与影响因素之间的响应特征,揭示铁路沿线不均匀地面沉降空间分布与演化特征。结果表明,梯度可以很好地体现区域地面沉降不均匀性,研究区可压缩层厚度、地下水开发利用情况、铁路运行等均与地面沉降呈现正相关关系。可压缩层的存在为沉降发生的基础条件,地下水开发利用与铁路运营为沉降产生的主导条件,二者的时空分布情况共同决定不均匀地面沉降的发展演化。
[Abstract]:Beijing-Tianjin (Beijing-Tianjin) intercity railway passes through the edge of the ground subsidence funnel, and its safe operation increases with the increase of uneven settlement. The time series interferometry is used to monitor the surface deformation along the railway line, and the response characteristics between it and the influencing factors are discussed in combination with the method of profile analysis and time series analysis, and the spatial distribution and evolution characteristics of the uneven land subsidence along the railway are revealed. The results show that the gradient can well reflect the heterogeneity of regional land subsidence, and the thickness of compressible layer, groundwater exploitation and utilization, railway operation and so on are all positively correlated with the land subsidence. The existence of compressible layer is the basic condition of subsidence, and the development and utilization of groundwater and railway operation are the dominant conditions of settlement. The spatial and temporal distribution of the two factors jointly determine the development and evolution of uneven land subsidence.
【作者单位】：天津城建大学地质与测绘学院;北京市地质研究所;首都师范大学资源环境与旅游学院;
【基金】：国家自然科学基金(41130744,41171335,41401492) 天津市自然科学基金(16JCZDJC40400)~~
【分类号】：P642.26

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