Publications / 1990 Proceedings of the 7th ISARC, Bristol, United Kingdom

Ground-Level Remote Control System for Pneumatic Caisson

Mitsuo Harada, Katsumasa Kawamoto, Toshio Sakuma
Pages 166-173 (1990 Proceedings of the 7th ISARC, Bristol, United Kingdom, ISSN 2413-5844)
Abstract:

Pneumatic caisson is characterized by its unique working condition that the working site is full of compressed air. Therefore, as the pressure goees up, working efficiency deteriorates because of being restrained by the environmental and safety factors of site conditions. thus, as the excavation depth gets deeper, the working conditions get much severee. So, execution in the great depth has been said to be difficult or almost impossible. Kajima corporation and Shiraishi corporation jointly developed "The Ground-level Remote Control System for Pneumatic Caisson", which can control operation, excavation, sinking and settlement for all pneumatic caisson construction works from an operation room located at ground surface. With the implementation of this system, the necessity for workers to be subjected to a highly pressurized environment has been reduced greatly. Tokyo electrical power co., Inc. applied this system to site work and solved various problems particular to pneumatic caisson. The features of the system are as follows: 1) Remote control of equipment in the pressurized chamber. 2) Automatic operationa of electric-powered hydraulic excavator. 3) Observational monitoring and measuring system. This paper presents development process, system outline, developed techniques, and application at the site.

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