上海市地下水位回升特征与影响分析

地下结构具有隐蔽性和难修复性等特点,地下水位的持续回升,对城市安全造成较大的安全隐患。通过选取上海市虹口区、徐汇区、普陀区和静安区内4口备用井,分析其历年地下水位监测数据变化特征,得出上海市第三和第四承压含水层均出现水位持续回升现象,回升幅度为10~15 m。此外,地下水位的持续回升造成上覆土层回弹。最后针对上海市地下水位持续回升问题,提出管控措施和建议,为类似问题提供参考。

Analysis on Characteristics&Influences of Groundwater Level Recovery in Shanghai

The underground structure has the characteristics of concealment&difficult to repair,and the continuous recovery of groundwater level has caused a great potential safety hazard to the urban safety.Through selecting four spare wells in Hongkou,Xuhui,Putuo&Jing'an Districts of Shanghai,analyzing the change characteristics of groundwater level monitoring data over the years.It is concluded that the third&fourth confined aquifers in Shanghai have the phenomenon of water level recovery continuously,and the recovery range is 10~15 m.In addition,the continuous recovery of groundwater level causes the rebound of overlying soil layer.Finally,in view of the continuous recovery of groundwater level in Shanghai,the control measures&suggestions are put forward to provide references for similar problems.