【摘要】 运用Meyerhof理论和土的本构关系,探讨了粉喷桩侧摩阻力强化效应的形成机理。选用邯郸市3个工程的粉喷桩载荷试验资料,分析了侧摩阻力的强化效应与桩身强度、桩端土的承载力、荷载水平和桩长的相互关系,从而合理选择承载力较高的土层作为粉喷桩的桩端持力层,这对提高复合地基的承载力,减小建筑物的沉降量具有重要意义。该结论对其他类型的复合地基设计也具有借鉴作用。更多还原

【Abstract】 The data of load tests on deep jetting mixing(DJM)piles of 10 building sites in Handan city show that the skin friction of DJM pile has strengthening effect. The mechanism of strengthening effect of skin friction of DJM pile is studied by using the Meyerhof theory and the constitutive model of soil. Based on the data of load tests at 3 building sites in Handan city,the relationships of strengthening effect of skin friction with pile strength,bearing capacity of the pile-tip soil,and load level are analyzed. It shows that it is important to improve bearing capacity of foundation and reduce building settlement by choosing soil layer with better bearing capacity as the sustaining soil layer. The conclusion is also useful for designing other types of composite foundations.更多还原