Its top elevated level must exceed the highest water level downstream, be higher than the wave runup along the slope, and be no less than 0.5 meters.
棱体排水的顶部高程应超出下游最高水位，应大于波浪沿坡面的爬高，且不小于下列0.5米。
The retaining-wall foundation is built on the downstream bank slope of the bridge abutment, which stability cannot meet the requirement of specification.
重力式挡土墙建立在桥台的下游护坡上，墙的基础由桩和筏板构成。
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