论文部分内容阅读
针对传统地面沉降监测手段阻碍了地下水的开采控制及其相关研究这一情况,该文基于短基线集时序分析方法提取了天津市平原地表形变信息。首先根据合成孔径雷达干涉结果分析了天津市地面沉降分布特征,然后定量研究了地面沉降漏斗分布特征,最后以北辰区为例将实测地下水降落漏斗与地面沉降中心进行耦合。结果表明:天津市地面沉降产生主导因素为超量开采造成的地下水位下降,两者直接相关;地下水超采区内的地面沉降中心与地下水漏斗中心大致吻合,并有整体稍向西北方向偏移的趋势,原因可能为地下水开采后,受岩土的厚度与性质控制,其软土层固结速滞后于地下水位的水头变化。
In view of the fact that the monitoring methods of ground subsidence have hindered the exploitation control of groundwater and its related research, this paper extracts the surface deformation information of the plain in Tianjin based on the method of short baseline set time series analysis. First of all, based on the results of synthetic aperture radar interference, the distribution characteristics of ground subsidence in Tianjin are analyzed. Then, the distribution characteristics of ground subsidence funnel are quantitatively studied. Finally, the Beiming area coupling is used as an example to test groundwater landing funnel and land subsidence center. The results show that the main factor of land subsidence in Tianjin is the decrease of groundwater level caused by over-exploitation, which is directly related to each other. The ground subsidence center in groundwater over-mining area roughly coincides with the center of groundwater funnel, and the whole is slightly offset to the northwest The reason may be groundwater exploitation after being controlled by the thickness and nature of rock and soil, and the consolidation of its soft soil layer lags behind that of the groundwater head.