Study on Vertical Bearing Characteristics of Long and Short Pile Foundation in Loess Region
In this paper,the finite element model is used to study the effects of pile length ratio,long pile modulus,soil modulus ratio between ends and loading amount on the bearing performance of pile foundation.The results show that the pile length ratio decreases rapidly first and then slowly,and the reasonable pile length ratio is 2.17.The modulus of long pile is negatively correlated with pile settlement,and the reasonable modulus of long pile is 1 500 kPa.The soil modulus ratio between ends is negatively correlated with pile settlement,and the most reasonable one is when the soil modulus ratio between ends is 3.The axial force of long pile is negatively correlated with the depth under different pile length ratio,long pile modulus and soil modulus ratio between ends.For the axial force of long pile body under different loading conditions,the axial force and depth showed a negative correlation with a slow increase at first and then a slow decrease,and the phenomenon became more and more significant with the increase of loading load.The axial force of long piles increases with the increase of pile length ratio,pile modulus,soil modulus ratio between ends and loading amount.
Loess areaLong and short pile foundation pileNumerical simulationVertical bearing characteristic
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