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PREDICTION OF HIGH-RISE BUILDING SETTLEMENT FOUNDED IN NEOGENE CLAY
Abstract
The article deals with the prediction of deformation progress of the basement for a high-rise building founded in a deep foundation pit of 12.0 m below the ground level. Foundation consists of a stiff reinforcement concrete raft with basement in a Neogene layer of several ten metres. The deformation progress of the footing bottom is predicted by numerical approach of a finite-element method and the results are subsequently confronted with geotechnical monitoring. For this purpose, the input parameters were calibrated on the basis of the laboratory data, which were experimentally obtained by triaxial, oedometric and ring shear test. Advanced hypoplastic constitutive model for clay used in numerical study. Some parameters of intergranular strain concept were optimized. The results of the performed optimization present an identical shape of the deconsolidation curve of the footing bottom in phase of unloading by the excavation. However, they indicate difference in the range from 15 % to 30 % of total settlement in comparison with subsoil consolidation process.
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References10
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