摘要
为降低深基坑工程设计与施工风险,对现场实际水文地质情况进行抽水试验,取得准确水文地质参数(承压含水层),建立深基坑降水三维渗流与沉降的数学模型,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。该抽水试验指导进行了基坑突涌性评价和实际工况运行控制,为降水运行提供依据,对类似工程的设计、施工及风险控制具有借鉴意义。
In order to reduce the risk in design and construction of deep foundation engineering, a field pumping test is done based on the actual hydro-geological conditions, and the accurate hydro-geological parameters of confined aquifer are obtained. Though this test, a 3D seepage and subsidence model is established, the monitoring data is used to expand the parameter inversion, then to forecast the trend of seepage and land subsidence caused by precipitation during the operation. The pumping test is helpful to guide the foundation pit evaluation and the control of actual operating condition, it provides the basis for precipitation, and also can be taken as the reference for similar projects in design, construction and risk control.
出处
《城市轨道交通研究》
北大核心
2013年第6期49-52,共4页
Urban Mass Transit
关键词
深基坑
承压含水层
抽水试验
数值模拟
地面沉降
deep foundation pit
confined aquifer
pumping test
numerical simulation
land subsidence
