罗勇, 胡瑞林, 叶超, 雷坤超, 田芳, 崔文君, 王荣, 赵龙, 王新惠. 2017: 北京市地面沉降单元划分方法探讨. 工程地质学报, 25(Z1): 95-106. DOI: 10.13544/j.cnki.jeg.2017.s1.091
    引用本文: 罗勇, 胡瑞林, 叶超, 雷坤超, 田芳, 崔文君, 王荣, 赵龙, 王新惠. 2017: 北京市地面沉降单元划分方法探讨. 工程地质学报, 25(Z1): 95-106. DOI: 10.13544/j.cnki.jeg.2017.s1.091
    LUO Yong, HU Ruilin, YE Chao, LEI Kunchao, TIAN Fang, CUI Wenjun, WANG Rong, ZHAO Long, WANG Xinhui. 2017: THE STUDY OF PRELIMINARY DIVISION OF LAND SUBSIDENCE UNITS. JOURNAL OF ENGINEERING GEOLOGY, 25(Z1): 95-106. DOI: 10.13544/j.cnki.jeg.2017.s1.091
    Citation: LUO Yong, HU Ruilin, YE Chao, LEI Kunchao, TIAN Fang, CUI Wenjun, WANG Rong, ZHAO Long, WANG Xinhui. 2017: THE STUDY OF PRELIMINARY DIVISION OF LAND SUBSIDENCE UNITS. JOURNAL OF ENGINEERING GEOLOGY, 25(Z1): 95-106. DOI: 10.13544/j.cnki.jeg.2017.s1.091

    北京市地面沉降单元划分方法探讨

    THE STUDY OF PRELIMINARY DIVISION OF LAND SUBSIDENCE UNITS

    • 摘要: 我国地面沉降较为发育,华北平原、汾渭盆地和长江三角洲沉降问题均很突出,沉降防控形势较为严峻。作为地面沉降防控之基础,进行地面沉降单元划分十分必要,但在我国许多城市(包括北京市)均为空白,为此本文提出了基于综合考虑地质构造、地层结构、地下水系统、含水层结构等条件的多元地面沉降单元多因子耦合集成的思想,结合地面沉降成因机制,在分析各主要地质条件基础上,提出以地下水渗透性、含水层组结构和可压缩层厚度分区为基础的多因子综合集成地面沉降单元。以北京平原区为例,基于GIS空间分析平台,将北京平原区划分为37个地面沉降单元,这些单元各自的沉降特性均存在一定程度的一致性,应作为最小的地面沉降评价和防控单元加以利用和实施沉降要素管理。将划分出的沉降单元与现有地面沉降区进行对比分析后发现,沉降单元与地面沉降发育现状吻合程度较高,能够反映一定区域内沉降共性特征。沉降单元可作为地面沉降调查、监测、研究和防控基本单元加以利用和管控。

       

      Abstract: Regional land subsidence induced by groundwater overdraft has became a global problem. The land subsidence is relatively development in our country especially, North China plain, Fen-Wei Basin and Yangtze River delta. Subsidence preventive was a significant challenge in urban geological. This paper aims to put forward the conception of land subsidence unit based on ideas of systematic land subsidence preventive. It considers that structure, lithology, groundwater system and aquifer structure are based to divide land subsidence units. Three mainly factors are confirmed by analysis main geological conditions and formation mechanism of land subsidence, include division of groundwater system, aquifer system and thickness of compressible layers. The division principle of land subsidence units was proposed mainly based on the three factors. Using Beijing plain as a target area, the twenty units of land subsidence are divided based on spatial analysis platform of GIS.The units of land subsidence are concordant with the status of land subsidence, and generally characteristic of land subsidence are reflected in some extent, which are based on compare and analysis the relationship between subsidence units and subsidence areas. It is proposed that land subsidence units could be applied for investigation, monitoring, study and preventive of land subsidence, then thoroughly develops the study of control mode of subsidence division. It can make more reasonable, accurate and systematic for prevention and control of land subsidence in the future.

       

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