| 摘要 |
Method and apparatus for preventing water from flooding along the length of a super elevation surface having a slope from an upper end to a lower end transverse to a longitudinal direction of the surface. A chain of rigid buoyant gate units of increasing heights is flexibly sealingly laterally linked together side by side for pivotable movement of the gate units about at least one pivotation axis, and if more than one axis, then about coplanar pivotation axes. The gate units are situated in a recess in and transverse to the longitudinal direction of the surface between a pair of walls lining the surface parallel to the longitudinal direction to which the pivot axis or axes is/are transverse. One of the walls is at a lower end of the slope and the other wall is at the upper end of the slope. The chain of panels rotates upward serially beginning with a gate unit closest to the lower wall and ending with a gate unit closer to the upper wall under the influence of water buoyancy and hydrostatic pressure, blocking water to one side of the upwardly rotated gate units.
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