摘要
针对宁波地区降承压水引起的周边环境变形问题,结合宁波地区的渗流特征,建立了深基坑降水三维渗流与沉降模型的数学模型。以宁波市东门口站为例,利用抽水试验期间监测数据对水文地质计算参数进行反演,进而对降水运行期间引起的渗流与地面沉降进行趋势预测,并与实测值对比分析,其结果比较吻合。为类似工程的设计、施工及风险控制提供了依据,尤其是对于宁波地区后续轨道交通线路的建设具有长期借鉴作用。
In order to analysis the Land-subsidence caused by the necessary dewatering of confined water in Ningbo,a draw-off fields and Land-subsidence was established with characters in different stress state.The model was applied to analyze and forecast the distribution and variation of the groundwater flow and strata deformation due to the dewatering of deep confined aquifer in the Dong Men-kou Station of Ningbo.According to the measured data obtained during the field pumping tests,the parameters were determined by back analysis,then applied to simulate and forecast the distribution of groundwater flow and land-subsi-dence fields during the succession dewatering of deep confined aquifer.It seemed that the results were nearly in accordance with the measured data.This conclusion of draw-off test and the findings of expert examination could provide relevant technical support to design and construction of the follow-up in Ningbo construction of rail transit lines.
作者
张冬冬
ZHANG Dong-Dong(Shanghai Geological Mineral Engineering Investigation Co..Ltd,Zhabei,Shanghai200072,China)
关键词
承压降水
数值模拟
渗流场
地面沉降
dewatering of confined water
numerical simulation
draw-off tields
land subsidence
