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
thickness of sub-sealing concrete
bottoming concrete thickness
覆土厚度
Covering soil thickness
Covering layer thickness
Soil cover depth
Soil covering thickness
thickness of covering soil
soil thickness