Naruse Dam Construction Project KAJIMA, MAEDA, TAKENAKA CIVIL ENGINEERING Joint Venture

A4CSEL

Introduction to our construction technologies

Making autonomous operation of multiple construction machines possible.
A next-generation construction production system.

A4CSEL (Quad Accel), an abbreviation for Automated / Autonomous / Advanced / Accelerated Construction system for Safety, Efficiency, and Liability, is a construction system in which multiple driver-less construction machines being operated from a control room can conduct work automatically and autonomously. This system provides a solution to problems such as the lack of experienced workers, an aging labor population, and the overall general decrease in construction workers while also dramatically improving productivity and safety.

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Special Characteristics of A4CSEL

Characteristic 1Improvement in Work Production

Operation of multiple construction machines with a minimum number of operators required

Because the construction machines are operated autonomously and automatically according to work instructions from a computer, it is possible to operate a large number of construction machines with a small number of operators. In addition, high construction quality is ensured thanks to the collection and analysis of operation data gathered from many skilled operators that is incorporated into the control method. This dramatically increases construction productivity.

Sending instructions to automated heavy duty machines from the control room

Sending instructions to automated heavy duty machines from the control room

Characteristic 2Improvement of Construction Site Safety

Significant decrease of the risk of workplace accidents in all work environments

A4CSEL technology machines measure surrounding conditions in real time, recognize the presence of people and obstacles, and assess the safety of their operation path. Based on this, it is equipped with an automatic stop / restart function to conduct autonomous driving that ensures safety.
Using unmanned construction machinery not only reduces the risk of accident and disasters, but also makes construction possible even in the harshest of environments.

CSG construction being done using automated heavy duty machinery

CSG construction being done using automated heavy duty machinery

Characteristic 3High Versatility

Equipping general-purpose heavy duty construction machinery with automated functions

One of the biggest features of A4CSEL is that it does not use specific automated-use-only machinery, but rather equips general-purpose construction machinery with automated functions. Due to the equipment of measuring instruments and tools such as GPS, gyroscopes, laser scanners, etc. as well as that of an operations computer, the machines can be maneuvered automatically.

An automated dump truck and automated bulldozer

An automated dump truck and automated bulldozer

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Points in Naruse Dam Construction

The use of 20 to 30 automated heavy duty machines will be implemented in the Naruse Dam dam body construction work.
We are planning to use the machinery for the construction of the trapezoidal CSG dam body.

Naruse Dam construction site conditions

Naruse Dam construction site conditions