江苏省徐州市睢宁县城区地面沉降稳定性分析与评价

根据江苏省徐州市睢宁县城区内可压缩土层的类型、空间分布特点及压缩变形等特征,建立了本区地面沉降计算地质模型。利用该模型计算出城区2013年累计地面沉降量3.08~380.60 mm,平均为162.41 mm,最大沉降量发生在城区西北部,该区域可压缩土层、黏性土的累计厚度大,地下水水位下降幅度较大。根据预测2030年地下水位埋深条件,采用地面沉降地质模型计算得出城区累计地面沉降量,在此基础上对区内地面沉降危险性进行分区,从而为地下水开采总量的控制及地面沉降监测控制提供相关建议措施,以避免城区2030年后地面沉降地质灾害逐步发展为特大型地质灾害。

Stability analysis and evaluation of land subsidence in Suiningurban area of Xuzhou City,Jiangsu Province

A computation geological model is obtained abstractly according to the type, spatial distribution and compression deformation of compressible soil in Suining urban area of Xuzhou City, Jiangsu Province. The accumulative land subsidence ranges from 3.08 to 380.60 mm, averaging of 162.41 mm under the condition of water level in 2013; and the maximum is in northwest of the study area, where the thickness of compressible soil, cohesive soil are large and groundwater level declined largely. Furthermore, the estimated accumulative land subsidence and risk zoning is acquired under the condition of water level in 2030, that provides relevant suggestions and measures for total amount control of groundwater mining and land subsidence monitoring. The research is helpful to avoiding the land subsidence gradually developed into a large geological disaster in 2030.