Frontiers of Structural and Civil Engineering
>> 2009,
Volume 3,
Issue 3
doi:
10.1007/s11709-009-0035-0
Research articles
Centrifuge model test and field measurement analysis
for foundation pit with confined water
Key Laboratory of Road
and Traffic Engineering of the Ministry of Education, Tongji University,
Shanghai 200092, China;
Available online: 2009-09-05
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Abstract
The similarity law of centrifuge test was developed for the seepage field and stress field of a foundation pit with confined water by analyzing control equations, and a similarity index and a similarity coefficient of centrifuge test were obtained. Based on the deep foundation pit of the Huangxing Road Station of the Shanghai metro line M8, the deformation stability of the pit was tested. Finally, a comparative study was conducted on the test results of the pit deformation and the field measurement results. Comparison results show that the pit deformation regularity of the test is basically identical with that of the field measurement, and the difference in pit deformation between the test and the field measurement is within 50%. The centrifuge model test can effectively simulate the displacement response of the ground and retaining structure during dewatering and excavation for the pit with confined water, which provides a reliable basis for the design and construction of the pit with confined water.
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