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《Rock and Soil Mechanics》 2006-06
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Determination of coefficient M_s during calculation of surrounding ground settlement due to foundation pit dewatering

WANG Cui-ying1,HUANG Li-xing2,DUAN Wei-chang3,YU Yi-feng3(1.Hubei University of Technology,Wuhan 430068,China;2.Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;3.Hubei Chang An Building Stock Co.,Ltd.Yingshan 438700,China)  
From overburden layers,semipervious layers above depression-cone level drainage consolidation,porous media(geo-formation) compression and water compression,the ground settlement mechanism is analysed during foundation pit dewatering.Compression layers thickness due to dewatering is chiefly overburden layers,semipervious layers thickness above depression-cone level.Collecting the related data of 10 foundation pits dewatering engineerings,the practical values and theoretical values are compared and a set of modified-coefficient M sof surrounding ground settlement due to foundation pit dewatering(aggregately 880 groups of data) are got.Using BP neural network method to process those data,we can find a sort of net mapped connection between given inputs(t,S,E s,h) and outputs(M s).We can use net connection to input a sort of(Es,h),and get isoline of modified-coefficient M s which is corresponding with different t,S.Accordingly we can find modified-coefficient M s of arbitrary t,S,which has practical value to foundation pit dewatering engineering of similar layers to forecast practical settlement at different times and distances from foundation pit.
【CateGory Index】: TU463
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