Analysis of bearing properties of bag-grouting-pile composite foundation in soft soil area
By studying the friction of soil,pile and pile-soil contact surface,and analyzing the connection and force transfer mode between these three.The bearing properties of monopile composite foundation with the variation of pile length and pile spacing is analyzed.The finite element program ABAQUS is used to study and analyze the composite foundation of bag-grouting-pile by finite element method.The bearing properties of the composite foundation of single pile with the variation of pile length and pile spacing are studied by controlling a single variable.The stress concentration phenomenon at the top of the composite foundation pile is obvious,which decays gradually at the top of the pile and accelerates at the bottom.With the increase of load,the lateral frictional resistance of the upper part of the pile increases and the distribution trend with the change of pile length is not much different,and the degree of play decreases with the increase of pile spacing.The results show that the bag grouting pile can transfer the load to the deep soil layer,and the lateral friction resistance in the upper part of the pile is stabilized,and the lower part of the lateral friction resistance is played to a large extent.The influence of pile-soil interaction and soil consolidation between piles should be considered when designing the bearing capacity of composite foundation.
composite foundation with bag-grouting-pilefinite element modelpile-soil interactionfoundation bearing capacity
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