长螺旋钻孔植桩工法竹节桩承载力试验研究

Experimental study on bearing capacity of bamboo joint pile planted by long auger

在天津市滨海新区某典型场地,分别进行了长螺旋钻孔植桩和锤击法施工的竹节桩单桩抗压承载力试验,并与锤击法施工的PHC管桩进行对比,对不同施工工艺的承载力特点进行了分析。现场试桩数据表明,锤击法施工的竹节桩的承载力大于锤击法施工的PHC管桩,但离散性大,适用性差。长螺旋钻孔植桩工法竹节桩的承载力比锤击法施工PHC管桩承载力提升明显,且和锤击法施工的竹节桩比,其承载力发挥相对稳定。

In Tianjin Binhai New District,the compressive bearing capacity test of bamboo joint piles planted by long auger and driven by hammer is performed,and compared with PHC pipe piles driven by hammer.The bearing capacity characteristics of different methods are analyzed.The field test data shows that the bearing capacity of the bamboo pile driven by hammer is greater than that of the PHC pipe pile driven by hammer,but the dispersion is large and the applicability is poor.The bearing capacity of bamboo joint piles planted by long auger is significantly higher than that of PHC pipe piles driven by hammer,and the bearing capacity is relatively stable compared with that of bamboo piles driven by hammer.