竖向荷载作用下桩基荷载传递计算方法

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。

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

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.