Obayashi develops various construction-related technologies to meet the needs of its customers and society. In the civil engineering field, Obayashi has developed long-distance tunneling technologies that enable shorter construction periods, and soil remediation technologies. Obayashi has also developed time-saving technologies in the building construction field in addition to technologies that reduce costs, dampen vibration, and protect against earthquake damage.

URUP (Ultra Rapid Under Pass) Method

Tunnel in the Metropolitan Expressway Central Circular Shinagawa Route

The URUP method developed and implemented by Obayashi is the world’s first tunneling technology that uses a shield machine to tunnel underground through the entire length of the tunnel from entrance to exit. It enables rapid construction of road and railway underpasses.
In comparison with conventional construction methods, the URUP method shortens the construction period by roughly two-thirds by eliminating the need for open-cut excavation and vertical shafts. It also substantially alleviates traffic congestion and noise associated with the construction work. It should contribute to reducing CO2 emissions as well.

Comparison with conventional construction method