测绘通报 ›› 2018, Vol. 0 ›› Issue (9): 108-111.doi: 10.13474/j.cnki.11-2246.2018.0290

• 技术交流 • 上一篇    下一篇

北京平原区不均匀沉降控制因素研究

郑佳荣1, 宫辉力2, 李青元3, 陈蓓蓓2   

  1. 1. 北京工业技术学院, 北京 100042;
    2. 首都师范大学资源环境与旅游学院, 北京 100048;
    3. 中国测绘科院研究院, 北京 100830
  • 收稿日期:2018-05-15 出版日期:2018-09-25 发布日期:2018-09-29
  • 作者简介:郑佳荣(1979-),女,博士,副教授,主要从事地理信息系统应用基础教学与研究。E-mail:zhengjrcumtb@sina.com
  • 基金资助:

    北京市教委科研计划(KM201810853004;KM201810853006)

Study on the Uneven Settlement of Beijing Plain Area

ZHENG Jiarong1, GONG Huili2, LI Qingyuan3, CHEN Beibei2   

  1. 1. Beijing Polytechnic College, Beijing 100042, China;
    2. College of Resources Environment and Tourism Capital Normal University, Capital Normal University, Beijing 100048, China;
    3. Chinese Academy of Surveying and Mapping, Beijing 100830, China
  • Received:2018-05-15 Online:2018-09-25 Published:2018-09-29

摘要:

采用北京平原地区的PS-InSAR时序监测结果(2003—2009年),结合GIS空间分析构建沉降速率坡度图,进一步叠加地质构造数据、水源数据和路网数据,从时间、空间、事件3个维度分析北京平原区不均匀沉降控制因素。研究结果表明,地质构造尤其是第四系沉积物岩性与厚度的差异是地面发成不均匀沉降的内因;地下水大量、持续的抽取活动、地面动载荷的增加使可压缩层水位被动降低,导致持续性应力转移、出现大面积不均匀沉降区域。当外因达到一定程度,就表现为控制因素。

关键词: PS-InSAR, 北京平原区, 沉降, 地下水

Abstract:

In this paper,the results of PS-InSAR monitoring in Beijing plain (2003—2009) combined with GIS spatial analysis is used to analyze the differential settlement.Based on the comprehensive analysis of geological structure data,water source data,road network data and uneven settlement data,this paper studies the factors of uneven settlement in Beijing plain.The study shows that the uneven settlement mainly caused by geological structure,especially the difference in thickness and lithology of the Quaternary sediments.A large amount of continuous extraction of groundwater and the increase of the ground dynamic load make the water level of the compressible layer decrease passively,which leads to persistent stress transfer and large area of uneven settlement.

Key words: PS-InSAR, Beijing plain area, subsidence, groundwater

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