Field Test and Numerical Simulation Analysis of Bearing Characteristics of Large Diameter Pile Group Foundation
In this paper,the bearing characteristics of large-diameter pile group foundation were studied by combining field test and numerical simulation with a long-span bridge project.The research shows that when the diameter of pile is increased from 2.5 m to 3.0 m,the bearing capacity of pile foundation can be increased by 9.58%,and the bearing capacity of pile foundation can be effectively improved by increasing the pile length.The correlation coefficients of load bearing characteristics of pile group foundation are above 0.95.With the increase of pile group number,the ultimate bearing capacity of pile group increases obviously,and the effect coefficient of pile group decreases continuously,which indicates that the effect of pile group becomes more and more obvious,and the utilization rate of pile group is reduced.
Pile group foundationBearing capacity experimentBearing characteristicsNumerical simulation
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