和常规铁路相比，高速铁路对基床表层功能的要求更加严格。
The functional requirements on surface layer of foundation bed for high-speed rail-ways are rather more strict than for ordinary railways.
利用二布一膜的隔水防渗特性，铺设在路基基床表层，改良路基填料。
A kind of complex geomembrane was laid in the upper layer of the roadbed to prevent water penetration, therefore the lower classed soil could be used as fill of embankment.
利用二布一膜的隔水防渗特性，铺设在路基基床表层，改良路基填料。
A kind of complex geomembrane was laid in the upper layer of the roadbed to prevent water penetration, therefore the lower classed soil could be used as fill of embankment.
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