Research on Uplift Resistance of Micro-pile Group Pile Foundation in Plateau Mountain Area
In order to analyze the pull-out performance of micropile group pile foundation,the paper conducted tests on the pull-out perform-ance of micropile group pile,established a simulation model of micropile foundation,and analyzed the influence of inclination Angle on the load-displacement curve of micropile foundation,pile axial force and pile side friction resistance.The results show that with the increase of load,the displacement of pile increases slowly and then increases sharply.The pulling capacity of micro pile group foundation is 1 600 kN.With the increase of inclination Angle,the increasing slope of the fast increasing section of load-displacement curve begins to decrease,and the curve becomes more flat.With the increase of tensile load,the lateral friction load of micropile group foundation increases linearly at first and then gradually.With the increase of inclination Angle,the ultimate bearing capacity,pile axial force and maximum side friction load level of pile group foundation increase.
Plateau mountainous areaMicro pilePile group foundationNumerical simulationPullout resistance
国家科技期刊平台
NSTL
万方数据
