珠江三角洲平原区地面沉降成因机理分析

Analysis on the Causes of Land Subsidence in the Pearl River Delta Plain

通过对珠江三角洲平原区典型沉降点进行监测与实地调查,在基本探明松散层结构、软弱类土(包括欠固结人工填土、软土、软黏土、松散状砂性土和粉土)分布和地下水开发利用程度的基础上,结合水准、GPS测量、InSAR解译及地下水位动态等数据分析,按其沉降的表现特征定为蜂窝型地面沉降。

Through the monitoring and field investigation of typical settlement points in the Pearl River Delta Plain,we basically prove the distribution of loose layer structure and soft soil(including under-consolidated artificial fill,soft soil,soft clay,loose sandy soil and silt)and the degree of development and utilization of ground water.On this basis,combined with data analysis such as leveling,GPS measurement,InSAR interpretation and groundwater level dynamics,we define the type of subsidence of the Pearl River Delta Plain as the honeycomb land subsidence according to its settlement characteristics.