干厚黄土覆盖
dry and thick loess covering
大厚度自重湿陷性黄土
self weight collapse Loess with big thickness
厚湿陷性黄土层
thick hydrous collapsed loess
冻土厚度
thickness of frozen earth layer
封底混凝土厚度
bottoming concrete thickness
thickness of sub-sealing concrete
覆土厚度
Covering soil thickness
Soil cover depth
Soil covering thickness
thickness of covering soil
Covering layer thickness
soil thickness