苏锡常地区微承压水开采地面沉降效应研究

Study on the Land Subsidence by the Micro-Confined Groundwater Mining in Suzhou-Wuxi-Changzhou Area

根据苏锡常地区微承压含水层的基本特征与地下水开采诱发地面沉降的机理,采用对比分析方法,确定开采微承压水的主要压缩层位,以及开采微承压水诱发地面沉降的影响因素,从定性的角度分析开采微承压水对诱发地面沉降的影响程度.结合微承压水开采示范工程,假定水位埋深降至微承压含水层顶板条件下定量计算地面沉降量,并从示范工程地面沉降实测数据分析了开采微承压水诱发地面沉降的影响程度.

According to the basic characteristics of micro-confined groundwater aquifer and the mechanism of the ground subsidence bringing out grounwater mining, this paper defines the main compression soil horizon and brings out the ground subsidence influence factors by mining the micro-confined grounderwater with a contrastive analysis mothod, and proves the influence degree on bringing out ground subsidence by adopting the qualitative analysis mothod. Combining with the micro-confined groundwater miniing demmonstation engineerings, this paper gains the ground subsidence value by adopting quantitative calculating supposing the groundwater level under the micro-confined aquifer roof-to-floor, and analyses the influence degree on bringing out ground subsidence by mining the micro-confined groundwater by using ground subsidence practical measurement datas.