高原山区微型桩群桩基础抗拔性能研究  

Research on Uplift Resistance of Micro-pile Group Pile Foundation in Plateau Mountain Area

作　　者：涂刚 Tu Gang(Guizhou Tongsheng Architectural Design Co.Ltd.,Guiyang,Guizhou 550081)

机构地区：[1]贵州同盛建筑设计有限公司,贵州贵阳550081

出　　处：《江西建材》2024年第7期194-196,共3页

摘　　要：为了分析微型桩群桩基础的抗拔性能,文中对微型桩基础群桩的抗拔性能展开试验,建立微型桩基础的仿真模型,分析倾角对微型桩基础荷载-位移曲线、桩身轴力以及桩侧摩阻力的影响。结果表明,随着荷载的增加,桩的位移呈现缓慢增加后骤增的规律,微型群桩基础的抗拔承载力为1 600 kN;随着倾角的增加,荷载-位移曲线的快速增加段的增加斜率开始降低,曲线变得较为平缓;随着施加抗拔荷载的增加,微型桩群桩基础的侧摩阻力分担荷载呈现先线性增加后开始平缓的趋势;随着倾斜角的增加,群桩基础的极限承载力、桩身轴力以及最大侧摩阻分担荷载水平均增加。In order to analyze the pull-out performance of micropile group pile foundation,the paper conducted tests on the pull-out performance 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 1600 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.

关 键 词：高原山区 微型桩 群桩基础 数值模拟 抗拔性能 

分 类 号：TU473.1[建筑科学—结构工程]