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《Journal of Beijing University of Technology》 2006-10
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Construction Monitoring Analysis for an Open Excavated Foundation-pit of a Subway Station in Beijing

ZHANG Ming-ju YOU Hai-liang DU Xiu-li WANG Yan ZHANG Wen-yu (College of Architecture and Civil Engineering,Beijing University of Technology,Beijing,100022,China)  
A field monitoring programme is carried out for the open-excavated project of a subway station in Beijing,the trends of the displacements and the inner forces are under control,and the change of characteris- tics of displacements and inner forces in the retaining structure during the construction is analyzed.The neces- sary engineering measurements are taken to keep the stability of the excavated foundation pit.There are sev- eral monitoring conclusions as follows:a)the horizontal displacements of retaining structure increase with the construction duration and tend to be ltable gradually after the foundation-pit excavation is completed,The largest displacement appears on the second layer steel support tube and the displacement is the smallest in the bottom of retaining structure;b)the axial forces on the first layer steel-support tube significantly greater than those of the second and the third layers;and c)the axial forces on the diagonal steel-support tubes in the out- side corner of the foundation-pit are much greater than those of the others.
【Fund】: 北京市教育委员会科学技术与研究生教育建设项目资助(4700001401506).
【CateGory Index】: U231.3
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