Ground Vibration Generated by an Underground Moving Load

The three-dimensional transmission of ground vibration subjected to a point load moving along a beam is investigated theoretically, where the beam is located inside a layer and parallel to both the ground surface and bottom of the layer. According to the specified boundary conditions along the beam and layer, analytical solutions of displacement are obtained in the wave number-frequency domain employing a Fourier transform, and the space-time domain response is obtained employing a fast inverse Fourier transform. Numerical results show that, for a constant moving load, the ground vibration has a typical low-frequency feature, and vibration in the horizontal direction should be considered when studying the effect of an underground moving load on environmental vibration.