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Obayashi and Toyota develop next-generation road concept

22:08 | 31/07/2021

(Construction) - Japanese construction company Obayashi Corporation and the research laboratories of Toyota Motor Corporation announced "DiverStreet," a next-generation road concept that can create underground space for efficient infrastructure layout.

Obayashi and Toyota develop next-generation road concept

Obayashi has also developed a new method of constructing underground spaces as an elemental technology necessary to realize the concept. The new method uses steel sheet piles, which are used for retaining soil in precast box culvert construction, to achieve a significantly shorter construction period and lower costs.

"DiverStreet" is a concept that utilizes underground space for the advancement of logistics systems and the efficient layout of infrastructure such as utilities. As it includes anti-disaster approaches such as rainwater storage during heavy rains, it will also help corporations to continue business activities after natural disasters. It will enable communications between road surfaces for automatic driving and power supply while driving. It will also contribute to the integration of next-generation mobility.

The newly developed method for constructing underground spaces introduces conventional temporary steel sheet piles used for retaining soil in precast concrete box culvert. The only precast material to be manufactured at a factory is the floor slab, which would greatly reduce the cost of material manufacturing and transportation. Compared to the conventional method, the construction cost can be reduced by about 40% and the construction period by about 20%.

The excavation area is also reduced because the work space between the steel sheet pile and the side wall of the structure is no longer necessary. As a result, the excavation area can be reduced, and steel sheet piles can be cast even in close proximity to buildings. (2021/07/26)

The Daily Engineering and Construction News of Japan


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