【摘要】 首先采用太沙基一维固结理论计算某时刻桩侧土体的固结沉降量,并对影响其结果的关键参数—固结系数进行了深入讨论,在此基础上,引入改进的佐藤悟双折线模型,用荷载传递概念建立出基桩各段的力平衡方程与位移平衡方程,然后对桩顶位移赋初值,即可经迭代计算求出该时刻桩身负摩阻力发展情况和中性点位置.最后,利用本方法对某实例进行了计算,其与另外3种理论计算结果的对比表明,该方法能较准确地描述基桩负摩阻力随时间的发展过程.图5,参8.更多还原

【Abstract】 The settlement of soil around pile at a certain time has been firstly calculated with Terzaghi one-dimensional consolidation theory,then,the key parameter—coefficient of consolidation which has an effect on the result of settlement was discussed.Later on,with the improved Kezdi’s double-broken-line model and the load transfer method,the equations of equilibrium of force and displacement to the sections of pile were established.With a initial value given to the displacement of pile tip,the development condition of negative skin friction of pile shaft and the position of the neutral point at this time were solved with a few steps of iterative calculation.Lastly,author adopt the method to calculate an example,it indicates that the method accurately describe the development of negative skin friction of pile in comparison with the result solved by the other three methods.5figs.,8refs.更多还原