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介绍了处于黄河中下游冲积平原的郑州黄河公铁两用桥深长桩基承载力测试的传统静载荷试桩法。分析了大量的实测数据及相应的Q-s曲线,并将实测结果与规范方法所得结果进行了比较。结果表明:实测桩的承载力小于相应规范值,前者约为后者的74%;实测桩侧摩阻力与相应规范值基本相当,而实测桩端阻力远小于相应规范值,前者约为后者的20%;桩侧阻力先于桩端阻力的发挥,桩的沉降量主要是桩身压缩量。
This paper introduces the traditional static load test method for bearing capacity test of deep pile foundation of Zhengzhou Yellow River Rail-cum-Road Bridge in the alluvial plain in the middle and lower reaches of the Yellow River. A large number of measured data and corresponding Q-s curves were analyzed, and the measured results were compared with those obtained by the canonical method. The results show that: the bearing capacity of the measured pile is less than the corresponding normative value, the former is about 74% of the latter; the measured side frictional resistance is basically equivalent to the corresponding normative value, while the measured pile end resistance is far less than the corresponding normative value, Of the 20%; pile side resistance before the end of the pile resistance to play, pile settlement is mainly the amount of pile compression.