Exploiting groundwater is a main reason to the ground settlement and uneven settlement can do great harm to the high- speed railway bridge. Centrifuge model tests are conducted to investigate the influence of exploiting groudwater on the high-speed railway bridge. The deformation of soils and the bridge are measured during the centrifuge model tests of exploiting water based on a drainage system developed to simulate exploiting water during centrifuge tests. The influences of uneven ground settlements on the rigid bridge

simply supporfed single bridge and simply supported multispan bridge are discussed. The results show that the bridge deforms intensively during the period of unsteady fluid flow after water was exploited initially. The axial strain of the deck can be decreased by reducing the length of the balk or replacing the bridge pier by hinged bearing. The horizontal displacement of ground can cause some deformation on the central part of the rigid bridg