According to the Biot wave theory and the complex function combined with multi coordinate method

the wave scattering dynamical equation of liquid- filled pipe in saturated soil impacted by P waves is solved. The effects of fluid property in the pipe

incident wave angle and buried depth on the distributions of dynamic stress concentration coefficient and pore pressure concentration coefficient are analyzed. The results show that

in low frequency elastic wave incidence

dynamic stress concentration coefficient and pore pressures concentration coefficient are relatively uniform distributions around the periphery of the pipe; when the incident frequency increases

the distributions become complex

but the peak values decrease. In low or middle frequency elastic wave incidence

the dynamic stress concentration coefficient and pore pressure concentration coefficient of the pipeline filled with water or oil are relatively smaller than air medium. But in high frequency elastic wave incidence the opposite is the case. When the fluid medium in pipeline is water

the influences of the incident angle and depth of pipeline on the dynamic stress concentration coefficient and pore pressure concentration coefficient are analyzed. With the increasing of incident angle

the distribution also occurs at certain angle deflection. When the incident wave is perpendicular to the pipe

the peak value of pipe dynamic stress concentration coefficient around the periphery of the pipe is relatively large. With the increasing of depth

dynamic stress concentration coefficient and pore pressures concentration coefficient show shock decrease.