“Transforming the construction site into a factory”
What is A4CSEL?
Developed by Kajima Corporation, A4CSEL (pronounced “quad-accel”) is a next-generation construction production system
with automatic operation of construction machinery at its core.
A4CSEL is based on the concept of operating multiple automated construction machines—with few workers—
in a manner that assures to construction work is performed effectively and safely.
By transforming “qualitative” construction site work (which until now has relied on experience, intuition, and craftsmanship of workers)
into a “quantitative” system based on production engineering,
Kajima is now “transforming the construction site into a factory” by means of A4CSEL.
A4CSEL for Dam
As for A4CSEL, since the first introduction of automatic vibration rollers at the Gokayama Dam in 2015, we have increased the number of A4CSEL-applicable models at sites such as the Oita River Dam and the Koishiwara River Dam. Moreover, as for the casting work on the embankment of the Naruse Dam (Higashi Naruse village, Akita Prefecture), more than twenty automated construction machines (five different types) work together to cast the embankment during the peak season.
A4CSEL for Tunnel
The field of application of A4CSEL is being expanded from dam construction to mountain tunneling. Aiming to make all work around the tunnel face (which is accompanied by high risk of accidents such as collapse) during construction of mountain tunnels unmanned, we are promoting the automation of all such work by adopting A4CSEL. Since October 2021, Kajima has been taking the challenge of being the first in the industry to conduct a demonstration test applying A4CSEL for tunneling in actual bedrock.
A4CSEL for Space
The application field of A4CSEL is not limited to the Earth. Since 2016, we have been collaborating with the Japan Aerospace Exploration Agency (JAXA) in a project that is considering using A4CSEL in the construction of a manned base on the Moon. There may come a day in the not-too-distant future when A4CSEL will be active on the Moon.