ground excavation 예문

• In the last decades also soft ground excavations up to became usual.
• Since the turn of the 21st century, NATM has been used for soft ground excavations and making tunnels in porous sediments.
• By July 2012, no significant work had begun on the temple as a contractor had not been found to remove the existing parking lot and start the below ground excavation for the two-level parking garage.