均质土中半埋入完整桩的瞬态波动响应

基于回传射线矩阵法，研究均质土中半埋入完整桩在半正弦脉冲激振力作用下桩顶的频域及时域响应，并与全埋入完整桩作对比，进一步分析外露桩长、土性参数对桩顶速度导纳和反射波的影响．结果表明：半埋入完整桩的速度导纳有大波峰夹小波峰的特征循环，相邻大波峰之间频率差反映外露桩和入土桩的长度；桩侧土刚度越大，反射波曲线整体向下偏移量也越大．

Wave Responses of Integrate Pile Embedded Partially in Homogeneous Soil

Based upon the method of reverberation-ray matrix, the velocity wave and velocity admittance at the top of integrate pile,that is embedded partially in homogeneous soil excited by a semi-sine impulse at the top end,are studied. The results are compared against those of the integrate pile embedded totally in homogeneous soil. The influences of exposed pile length and soil parameters on the velocity wave and admittance at the top are analyzed. The results show that big wave crests include small wave crests in velocity admittance curve of pile embedded partially in soil, and the lengths of exposed and embedded pile can be calculated by the D-value of adjacent big wave crests; when soil stiffness around the pile is increased, the downward offset value of velocity wave curve is bigger.