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通过12个钻孔注浆钢管桩试件的桩身轴压承载力试验,得出了各试件的荷载-变形曲线,对比分析了各种计算方法预测的试件轴压承载力的有效性。研究表明:1实测钻孔注浆钢管桩桩身轴压承载力比按钢管轴压承载力计算的设计值大约2.2~3.1倍;2实测钻孔注浆钢管桩桩身轴压承载力比按钢管轴压承载力+钢管内注浆体轴压承载力计算的设计值大约1.5~1.8倍;3实测钻孔注浆钢管桩桩身轴压承载力比按我国标准CECS28:2012中钢管混凝土柱轴压承载力计算的设计值大约1.3~1.6倍,吻合较好。
The load-deformation curve of each specimen is obtained through the axial compression bearing capacity test of 12 borehole grouting steel pipe pile specimens. The axial compression bearing capacity predicted by various calculation methods is comparatively analyzed Sex. The results show that: 1 The measured axial compressive bearing capacity of the grouted steel pipe pile is about 2.2 ~ 3.1 times the calculated value of the axial compressive bearing capacity of the steel pipe; 2 The measured axial compressive bearing capacity of the grouted steel pipe pile Than 1.5 ~ 1.8 times the design value calculated by the axial compressive bearing capacity of steel pipe + the axial compressive bearing capacity of the grouting body in the steel pipe; 3 The measured axial compressive bearing capacity of the grouted steel pipe pile under axial load is according to China’s standard CECS28: 2012 The calculated design value of axial compressive bearing capacity of CFST columns is about 1.3 ~ 1.6 times, which is in good agreement.