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本文通过对基桩缺陷进行概化处理,利用δ-函数建立了桩长有限、桩端为弹性支承时,考虑桩侧土作用,桩顶受纵向激振条件下,非完整桩(截面声阻抗发生突变状态下,有两个突变界面)受迫振动的定解问题,然后求得了稳态正弦及瞬态半正弦激振条件下的解析解,并对所得解进行了研究分析.最后,将瞬态激振条件下得到的理论曲线与反射波法测得的现场实测曲线进行了拟合对比.
In this paper, the basic pile defects are generalized and the δ-function is used to establish the finite length of the pile and the end of the pile is elastically supported. Considering the action of the side soil of the pile, under the condition of longitudinal excitation of the pile, the non-integral pile (acoustic acoustic impedance) In the state of abrupt change, there are two problems in the solution of the forced vibration of the abrupt interface. Then the analytical solutions of steady-state sinusoidal and transient semi-sinusoidal excitation conditions are obtained. The resulting solutions are analyzed and analyzed. Finally, the The theoretical curves obtained under transient excitation conditions are compared with the measured field curves measured by the reflected wave method.