In this study, the combined effects of rainfall and earthquakes on earth dams were modelled using a 1/40 scale model embankment, spraying device, and shaking table. Two scenarios were tested: one where the embankment was subjected to seismic motion after rainfall, and another where the embankment was subjected to rainfall after seismic motion. When the rain occurred first, causing the phreatic line to rise, the excess pore-water pressure at the toe of the embankment was higher than if there had been no rainfall, and the seismic stability of the embankment deteriorated. When the shaking occurred first, cracks due to seismic motion promoted subsequent rainfall seepage, increasing the amount of eroded soil in the embankment. Thus, rainfall damage and seismic damage influence and exacerbate each other.

在这项研究中，使用 1/40 比例模型路堤、喷洒装置和振动台模拟了降雨和地震对土坝的综合影响。测试了两种情况：一种是在降雨后路堤受到地震运动，另一种是在地震后路堤受到降雨。初雨时，潜线上升，路堤趾部超孔隙水压力高于无雨时，路堤抗震稳定性变差。当震动首先发生时，地震引起的裂缝促进了随后的降雨渗流，增加了路堤中的侵蚀土量。因此，降雨破坏和地震破坏相互影响，相互加剧。