Railway jacking bridge engineering passing through sand pebble (gravel) layer, because it is a complex loose coarse fragment accumulation layer, the roadbed must be reinforced.

• 摘要铁路顶桥工程中遇到砂卵（砾）石层时，因砂卵（砾）石层是一种复杂松散粗碎屑堆积层，因此必须对铁路路基进行加固。