在波士顿南站一段路堑中,由于路基软弱,线路经常变形,道床不断遭致泥浆和杂物的污染堵塞,钢轨接头处发生翻浆冒泥,经多方维修整治无效,多年被迫隈速行车。这段线路是美国东部的铁路通道,运输繁忙,影响很大。经多次研究,工程设计部门最终使用了一种槽形封底的办法,用复层土工薄膜作为封底材料,代替了造价高昂的传统病害整治措施,取得了成功的经验。 Due to the weak embankment and frequent deformation of the line in the section of the graben in Boston South Station, the track bed was continuously blocked by the pollution of mud and sundries. The joint at the rail joints was muddy. After being repaired by various parties, it was ineffective for many years and was forced to go for speeding. This route is the eastern part of the United States railway corridor, heavy traffic, a great influence. After many studies, the engineering design department eventually used a trough cover approach, using a layer of geomembrane as the back cover material instead of costly traditional disease remediation measures and achieved successful experience.