日本海洋サービス List of Products and Services

The "Temporary Closure LPF Method" is a construction method that builds temporary closures for underwater structures such as rivers, seas, and dams using liner plates. The Temporary Closure LPF Method contributes to shortening construction periods and securing holidays through the following means: - Reducing the production of custom components for each bridge pier - Selecting suitable shapes based on site conditions It can be implemented with manual labor alone and is feasible even in environments with a headroom restriction of approximately 1.0 meters or less. *Please refer to the case study collection that includes the construction achievements of the "Temporary Closure LPF Method." 【Features】 ■ Composed of liner plates, H-beams (reinforcement rings), and supports ■ Assembled in a cylindrical shape above the water surface and installed underwater ■ Construction is possible with a headroom restriction of approximately 1.0 meters! *Achievement of 1.2 meters ■ Vibration-free construction is possible in narrow areas! *Please download the PDF for method comparison materials and construction case studies.

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The "Fully Wet Type Underwater Wire Sawing Method" is a technique that allows for the cutting and removal of underwater concrete structures in a space-saving manner. Only diving work is performed for installation and removal, and the operation of machinery is done unmanned, significantly reducing the risk of personal injury. Additionally, since it is directly installed on underwater structures, there is no impact from vibrations or waves, and it can be executed with a diamond wire of the minimum necessary length. The use of biodegradable oil for work ensures that pollution to human bodies and water quality is minimized. *This handbook includes the construction methods, workflow, and equipment used for the "Underwater Wire Sawing Method." [Contents] - Features - Construction Overview Diagram - Wire Detail Diagram - Cutting Overview Diagram, etc. For more details, please refer to the catalog or feel free to contact us.

• Plastic processing machines (cutting and rolling)
• Processing Contract

The "Temporary Closure LPF Method" is a construction method for building temporary closures for underwater structures such as rivers, seas, and dams using liner plates. It addresses the issues of conventional closure methods and supports bridge pier reinforcement with "simplicity, speed, and excellent water-stopping capability." It can be implemented using only manual labor. This groundbreaking NETIS-registered method can be used in environments with a headroom restriction of 1.5 meters or less! Please feel free to contact us for more information! *Currently, we are offering a collection of case studies featuring the construction results of the "Temporary Closure LPF Method" for free exclusively to Ipros users! 【Features】 ■ Composed of liner plates (waterproof specifications), water-stopping rubber gaskets, H steel (reinforcement rings), and cutting beams ■ Can be constructed using only manual labor! ■ Construction is possible with a headroom restriction of approximately 1.5 meters! ■ Vibration-free, allowing construction close to existing structures (gas, electricity, water pipes, etc.)! ■ NETIS registration: CB-110010-VE (patented) *For more details, please refer to the catalog. Feel free to contact us as well.

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The completely wet underwater wire sawing method is a technique for cutting and removing structures such as concrete underwater when dismantling them. It allows for space-saving operations at great depths and is not affected by working depth (working depth from 0m to 45m). Since the wire saw machine is completely installed underwater, there are no human-related accidents, and because the cutting machine itself is underwater, work can continue even if the work vessel is swaying. It can be performed with a minimal length of diamond wire for cutting, and due to the compact size of the machine, CO2 emissions are significantly reduced. 【Features】 ○ Equipment can be loaded onto small vessels for preliminary cutting ○ Monitoring is done via surveillance cameras, allowing for immediate response to issues ○ Biodegradable oil (ISO 6743 Class L) is used for work ○ NETIS registration number KKK-090001-A (registration period has ended) For more details, please contact us or download the catalog.

• Plastic processing machines (cutting and rolling)
• Processing Contract

The excavation and removal method using MJP generates no contaminated water, making it a method with minimal environmental impact. It can achieve approximately 90% suction of the main diameter and allows for long-distance transport of excavated soil and other materials (with a maximum transport record of 450 meters). Additionally, since the driving water can be reused, it can increase the mud content in the sedimentation area. 【Features】 ■ No contaminated water is generated, resulting in minimal environmental impact ■ Approximately 90% suction of the main diameter is possible ■ Long-distance transport of excavated soil and other materials is possible ■ Driving water can be reused ■ It is possible to increase the mud content in the sedimentation area For more details, please refer to the catalog or feel free to contact us.

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The "Stirring Type Casing Pump Excavation Method" is an underwater excavation method that performs excavation, piping, and transportation within the casing, suppressing the generation of turbid water during excavation and transportation. By changing the equipment, excavation in narrow spaces is possible. Additionally, excavation can be carried out in locations where large machinery cannot be used. 【Features】 ■ Underwater excavation method ■ Excavation, piping, and transportation within the casing ■ Suppression of turbid water generation during excavation and transportation ■ Excavation in narrow spaces made possible by equipment modification ■ Excavation possible in locations where large machinery cannot be used For more details, please refer to the catalog or feel free to contact us.

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The "Underwater Stud Welding System" is a system that can manage the welding condition for each bolt and allows for space-saving operations. At Nippon Ocean Service Co., Ltd., we have been researching and exploring methods to efficiently and safely dismantle structures in underwater environments that were previously impossible. This system enables groundbreaking high-efficiency work and safe construction, shortening construction periods and reducing CO2 emissions by up to 1/11. 【Features】 - Capable of installing headed studs, deformed rebar studs, and threaded studs - Real-time monitoring of current waveforms allows for quality control of each individual stud - Equipment can be arranged in a space-saving manner - The compact size of the machinery significantly reduces CO2 emissions For more details, please refer to the catalog or feel free to contact us.

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• Welding Machine

At Nippon Marine Service Co., Ltd., we not only carry out various special construction projects but also conduct many underwater construction works, surveys, and environmental measures, all with a focus on safety. For construction in underwater environments such as rivers and seas, trust "Nippon Marine Service," which possesses special techniques and methods (such as underwater wire sawing and temporary cutoff LPF methods). For more details, please refer to our catalog or feel free to contact us.

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The "Real-Time Carbon Monoxide Detection Device" is a safety device that detects the concentration of carbon monoxide in the supplied air and alerts users through an alarm sound and a rotating light. 【Features】 ■ It detects and quantifies carbon monoxide that cannot be sensed, visualizing the concentration and notifying users through alarms to prevent carbon monoxide poisoning. ■ NETIS Registration Number: KKK-110001-A (Patent) For more details, please refer to the catalog or feel free to contact us.

• Other measurement, recording and measuring instruments