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。
Beijing-Tianjin inter-city railway travels through the edge of land subsidence funnels.With the increase of uneven settlement,it becomes a threaten for the safe operation of the railway.Time series interferometry technology is used to obtain the surface deformation along the railway,and crosssection method is used to reveal the spatial distribution and evolution characteristics of uneven subsidence.The results show that the gradient can well reflect the regional uneven land subsidence,which has presented positive correlation with the thickness of compressible layers,groundwater pumping and the railway operation.Compression layers are the basic preconditions,while the groundwater exploitation and utilization and the railway operation are the main reasons for land subsidence.The spatial-temporal distribution of the two factors may jointly determine the evolution of the non-uniform land subsidence.
作者
段光耀
刘欢欢
宫辉力
陈蓓蓓
DUAN Guangyao;LIU Huanhuan;GONG Huili;CHEN Beibei(School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China;Beijing Institute of Geology, Beijing 100120, China;Department of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China)
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2017年第12期1847-1853,共7页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金(41130744
41171335
41401492)
天津市自然科学基金(16JCZDJC40400)~~
