Ensure sufficient safety for operators! The work rate is about twice that of conventional methods, allowing for speedy operations!
The "OSJ Method" is an open-cut pipe installation method that continuously and repeatedly performs a series of tasks from excavation to backfilling. By adopting a hydraulic mechanism, it operates with no vibration and no noise. Since backfilling is done immediately after excavation, the work area is short, allowing for quick traffic reopening and minimizing the impact on residents' lives. Additionally, it can be applied to various soil conditions and only requires work in front of and behind the OSJ machine, eliminating the need for a work zone on the sides, making it possible to work in narrow spaces. 【Features】 ■ Continuously and repeatedly performs a series of tasks from excavation to backfilling ■ No vibration and no noise due to the adoption of a hydraulic mechanism ■ The opening is only where the OSJ machine is located, ensuring high safety for pedestrians and residents ■ The daily progress is about twice that of conventional methods, allowing for speedy work *For more details, please refer to the PDF materials or feel free to contact us.
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basic information
【Principle of Advancement】 ■1. When the hydraulic jack is extended, the tail frame retracts, compacting the backfill soil, and when sufficient reaction force is obtained, the front section advances and the cutting edge penetrates into the face. ■2. Next, as the excavation of the face proceeds and the hydraulic jack is retracted, the self-weight of the front section and the frictional force on the surrounding surface serve as reaction forces to advance the tail frame, while backfill soil is placed into the resulting void at the rear. ■3. By repeating steps 1 and 2, when a predetermined space is secured at the tail section, the pipeline is laid. *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Since our founding in 1925, we have contributed to the development of Japan's land through concrete products. From Sendai in the north to Hiroshima in the south, we respond to inquiries from various regions through a wide network. We have also established a system for delivering products from our own factory and manufacturing partners across the country. We offer over 1,800 types of products, the majority of which are original. We propose many products that contribute to "national resilience" as disaster prevention and mitigation measures against typhoons, floods, water damage, and landslides. With the motto "Proposal and technical capabilities that shape the future of Japan," we strive to meet our customers' expectations.