竖向荷载作用下桩基荷载传递计算方法

Calculation Method of Load Transfer for Pile Foundation under the Action of Vertical Loading

通过对己有各种单桩计算方法的研究总结,建立了单桩计算新理论。该理论与以往基于荷载传递法的单桩计算方法相比,做了如下改进:(1)桩侧与桩端采用广义荷载传递模型;(2)引入混凝土的Rusch模型以考虑高荷载水平作用下桩身混凝土的弹塑性性状;(3)耦合Mindlin解答以考虑桩侧摩阻力在桩端处产生的桩端位移。因此该单桩荷载-沉降关系计算方法在理论上更趋完善,使基于荷载传递法的多层地基中单桩荷载-沉降关系计算方法得到完善和统一。

Based on the study and analysis for a variety of single pile, a new calculating theory for single pile is put forward. To compare with former calculating methods of load transfer for single pile, some improvements are made as followe： （1） The generalized load transfer model is used for pile-side and pile-tip; （2） The Rusch model of concrete is introduced to consider the elastic-plastic characteristics of pile shaft under the heavy load; （3）The Mindlin＇s solution is coupled up to calculate the settlement in pile-tip caused by the pile-side＇s friction resistance. Therefore, the calculating method of load-settlement relation for single pile is being perfected theoretically. On the basis of load transfer method,the calculating method is used to multilayer soil foundations, thus make the method more unified and accurate.