2012•Journal of Central South University(Science and Technology)Requires access
Analytical calculation of pile-soil stress ratio of cement-soil mixed pile composite foundation
Qian Tao
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Abstract
An advanced unit model was put forward to analyze the pile-soil stress ratio of cement-soil pile foundation under embankment load.Based on the assumed vertical displacement of embankment fill and the assumed deformation formula of geogrid,the vertical stress of embankment fill and the tensile stress of geogrid on the top of pile were deduced.According to the balance of vertical loading on the top of pile,the vertical stress of the top of pile was established.The vertical stress of surrounding soil was derived by assuming that surrounding soil conformed to Winkler model,and the calculation formula of pile-soil stress ratio was established.The rationality of formula is confirmed by comparison with the measured data,and it has reference value to the design of composite foundation under embankment.