论文部分内容阅读
针对传统固定基准强制约束下获得的GPS形变量,可能还会受到板块活动及地表变形的影响。采用顾及板块运动、基准点稳定性及系统参数的区域基准模型,获取了太原市2009—2014年高精度GPS地面沉降量。结果表明:太原市南部地面沉降较严重,GPS监测点均呈下沉趋势,沉降量最大值位于太原南部高新技术开发区的观象台区域,近4年累计沉降量高达-115.2mm,主要是由于区域性长期过量开采承压地下水所致;而太原北部靠近边山处GPS监测点则均呈抬升趋势,近4年累计抬升量最大为18.3mm,主要是由于区域构造活动及“关井压采”地下水水位回升引起。该文利用GPS监测技术较好获取了太原市地面沉降现状,且对利用GPS监测技术高精度获取其他区域地面沉降量具有较好的参考价值。
For the GPS fixed variables obtained under the traditional fixed benchmark compulsory constraints may also be affected by plate activity and surface deformation. Using the regional datum model which takes into account the movement of plates, the stability of reference points and the system parameters, the ground settlement of high precision GPS in Taiyuan from 2009 to 2014 was obtained. The results show that the ground subsidence is more serious in the south of Taiyuan City, and the GPS monitoring points show a downward trend. The maximum settlement value is located in the observatory area of the High-tech Development Zone in southern Taiyuan. The accumulated settlement in the recent 4 years is as high as -115.2mm, The long-term over-exploitation of groundwater resulted from the over-exploitation of groundwater. The GPS monitoring points near the mountainside in the northern part of Taiyuan all showed an upward trend. The maximum accumulated lift in the past 4 years was 18.3mm, mainly due to the regional tectonic activities and “ ”Groundwater level rise caused. This paper uses GPS monitoring technology to obtain the current status of land subsidence in Taiyuan, and has good reference value for obtaining ground subsidence in other areas with high precision using GPS monitoring technology.