CAJ | 학술논문

振动沉桩过程中由于桩周动摩阻力的影响，桩身振动加速度随着入土深度的增加而逐渐减小，动摩阻力随着入土深度的增加而逐渐增大，当振动锤激振力能够克服桩侧动摩阻力及端阻力，同时桩端产生的最大振幅能够克服土处于弹性阶段的最大位移后桩可继续下沉。通过对桩身划分单元的方法，确定桩侧动摩阻力与桩身振动加速度之间的关系，计算得到不同入土深度位置的桩侧振动加速度，同时考虑应力波在桩身的传递，最终获得桩在不同时刻的动摩阻力，并通过桩端单元的振动加速度计算得到桩端最大振幅。
진동침장과정중유우장주동마조력적영향，장신진동가속도수착입토심도적증가이축점감소，동마조력수착입토심도적증가이축점증대，당진동추격진력능구극복장측동마조력급단조력，동시장단산생적최대진폭능구극복토처우탄성계단적최대위이후장가계속하침。통과대장신화분단원적방법，학정장측동마조력여장신진동가속도지간적관계，계산득도불동입토심도위치적장측진동가속도，동시고필응력파재장신적전체，최종획득장재불동시각적동마조력，병통과장단단원적진동가속도계산득도장단최대진폭。
While the pile was subsiding, because of the effect of dynamic friction around piles, the vibratory acceleration of the pile body was decreased along the depth into soil, and the dynamic friction was increased along the depth into soil. When the vibratory hammer exciting force is greater than the sum of dynamic friction and the pile end resistance, and if the max ampli-tude at the bottom of the pile is greater than the elastic deformation of the soil, the pile could submerge continuously. Through the method for dividing the pile into unit, we determined the relationship between the friction and acceleration of the pile, calcu-lated the accelerations of different unit, considered the stress wave passed in piles and then got the dynamic friction of the pile in different time. The max amplitude at the end of the pile could be obtained by calculating the vibration acceleration of the unit.