【摘要】 粉喷桩单桩承载力作为复合地基承载力的一个重要参数,其值的确定有助于复合地基的质量检验。载荷试验是确定承载力的有效、可靠方法,但常无法做到极限荷载阶段,有其局限性。本文将静载荷试验确定承载力问题作为一个灰色系统,结合已有的大量现场载荷试验成果,根据沉降确定承载力的方法,建立灰色系统理论的GM(1,1)模型对水泥粉体喷搅桩的Q—s曲线进行预测,从而确定单桩极限承载力。该方法的拟合度较高,有其适用性。更多还原

【Abstract】 Dry jet mixing pile’s bearing capacity is an important parameter for composite foundation. Loading test are commonly used as a reliable method to judge the value which is helpful to the quality inspection. However, for engineering pile, it usually has no way to load to the ultimate plase. In this paper, the loading test was regarded as a grey system, combined with the site loading test results and Q—s curve (early phase), a model of predicting the ultimate bearing capacity was found. Some site testing results showed that the predicting curve has a good agreement.更多还原