北京地区结构抗浮水位分析的区域法  

Regional method to determine anti-buoyancy groundwater level in Beijing area

作　　者：王军辉[1,2] 沈小克[2] 陶连金[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]北京市勘察设计研究院有限公司,北京100038

出　　处：《工程勘察》2015年第9期43-50,共8页Geotechnical Investigation & Surveying

基　　金：北京市科技计划项目(Y0605010040821);北京市优秀人才培养专项经费资助项目(2008F-13);北京市科技创新基地培育与发展工程专项2012年度提升计划项目(Z121106002812072)

摘　　要：抗浮水位是岩土工程设计领域中一项重要技术经济指标,本文在系统总结目前行业抗浮水位分析方法,尤其是在BGI法研究与应用基础上,提出了用区域地下水渗流模型进行抗浮水位分析的一种新方法,即区域法。本文首先基于大量的地质及水文地质资料分析,建立了北京市中心城区范围内(1100km2)的浅层地下水三维瞬态流模型,模型的可靠性得到了实测数据的充分识别与验证;其次考虑模型输入条件变化对预测结果的影响,提出了基于开放预测模型的动态水位预测理念,保证了水位预测结果可以随着北京市未来各种自然及人为影响因素的变化而得到及时修正。根据具体建筑的需要,在前述工作基础上,提出了抗浮水位的区域法分析思路;最后以北京某工程为案例,利用区域法进行抗浮水位分析,并将分析结果与BGI法进行比较分析,得到了较好的验证。Groundwater level for anti-buoyancy is an important technical and economic indicator in geotechnical engineering design. Based on the current methods for groundwater level determination for anti- buoyancy, especially on the BGI method, a new method for anti-buoyancy groundwater level determination using regional groundwater model is put forward, namely regional method. The detailed research work is carried out as follows： First, based on a large amount of geological and hydro geological data in the downtown area of Beijing City with the area of 1100km2, the 3D transient flow model of the shallow groundwater is established which reliability is identified and verified by observed data; Second, considering the affect of model input condition on the prediction, a concept of open prediction model is put forward, by which the prediction results can be corrected timely with the future natural and human factors change in Beijing city. According to the needs of specific project and based on above-mentioned works, the concept of regional method to determine anti-buoyancy groundwater level is proposed; Final, taking a project in Beijing as an example, the anti-buoyancy groundwater level is determined by regional method, the result is verified by comparing with BGI method.

关 键 词：浅层地下水 区域渗流模型 预测 抗浮水位 区域法 BGI法 

分 类 号：TU318[建筑科学—结构工程]