A person who does construction work underground or under water.
〈北美〉地下（或水下）建筑工人；隧道工
Example sentencesExamples
Going underground, he reclaims this haunted, burrowed space of the city as a legacy bequeathed to him by his grandfather, one of the sandhogs who dug the tunnels of the New York subway, and reinvents himself as Treefrog.
One of the sandhogs' biggest projects right now is building Water Tunnel Number 3, which is the largest capital construction project in New York City's history.
And a new tunnel is now being built by a fraternity of miners who call themselves the Sandhogs.
Definition of sandhog in US English:
sandhog
nounˈsan(d)ˌhôɡ
North American
A person who does construction work underground or under water, such as laying foundations or building a tunnel.
〈北美〉地下（或水下）建筑工人；隧道工
Example sentencesExamples
And a new tunnel is now being built by a fraternity of miners who call themselves the Sandhogs.
One of the sandhogs' biggest projects right now is building Water Tunnel Number 3, which is the largest capital construction project in New York City's history.
Going underground, he reclaims this haunted, burrowed space of the city as a legacy bequeathed to him by his grandfather, one of the sandhogs who dug the tunnels of the New York subway, and reinvents himself as Treefrog.