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《Chinese Journal of Underground Space and Engineering》 2010-04
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The Effects of Groundwater on the Raft Foundation of a Project and Its Disaster Mechanism

Yao Aijun,Su Ning,Zhao Qiang,Du Ping (College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)  
There are plenty of geotechnical problems caused by groundwater which occurred during underground space excavation;especially due to that groundwater has floating effect on raft foundation of underground building(structure),and such effect will lead to uneven subsidence and cracks.This article focuses on a typical engineering accident in which the raft foundation of a basement had inhomogeneous floating,via using ground penetrating radar,measurement and monitoring means,hydrological geology and engineering geology combining analysis,the effect of groundwater and its disaster formation of building raft foundation has been discussed.The investigation result shows,that the main reason of raft foundation floating is existence of two layers of complicated perched water in the foundation,and there were no effective groundwater control and reasonable construction measures,then,groundwater disaster occurred.The project took measure of precipitation,which gave good effect.
【Fund】: 国家自然科学基金项目(50678003);; 北京市教育委员会科技计划面上项目(KM200910005012)
【CateGory Index】: TU46
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