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

The "Temporary Closure LPF Method" is a construction method for building temporary closures of underwater structures such as rivers, seas, and dams using liner plates. The Temporary Closure LPF Method contributes to shortening construction periods and ensuring holidays through the following means: - Reducing the production of custom components for each pier - Selecting suitable shapes based on site conditions It can be implemented using manual labor alone and is feasible in environments with a headroom restriction of approximately 1.0 meters or less. *Please refer to the case study collection that includes examples of 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 water and installed underwater ■ Construction is possible with a headroom restriction of approximately 1.0 meters! *Record: 1.2m ■ Vibration-free construction is possible in narrow spaces! *For method comparison materials and construction case studies, please download the PDF to view.

• Renovation and repair methods

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 operations are conducted for installation and removal, and the machinery operates unmanned, significantly reducing the risk of personal injury. Additionally, since it is directly installed on the underwater structure, 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 operational purposes minimizes pollution to human health and water quality. *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.

• Civil Engineering Method
• River construction
• Coastal construction

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. It addresses the issues of conventional closure methods and supports bridge pier reinforcement with "simplicity, speed, and excellent water-stopping ability." 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 implemented using only manual labor! ■ Construction is possible with a headroom restriction of about 1.5 meters! ■ Vibration-free, allowing construction close to existing structures (gas, electricity, water pipes, etc.)! ■ NETIS registered: CB-110010-VE (patent) *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Renovation and repair methods
• River construction
• Earthquake-resistant construction method

The completely wet-type underwater wire saw method is a technique for cutting and removing structures such as concrete underwater during demolition. 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 entirely installed underwater, there are no human-related accidents, and because the cutting machine itself is underwater, operations can continue even if the work vessel is swaying. It can be constructed 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 a small vessel for preliminary cutting. - Monitoring is done via surveillance cameras, allowing for immediate response to any issues. - Biodegradable oil (ISO 6743 Class L) is used for operational fluids. - NETIS registration number KKK-090001-A (registration period has ended). For more details, please contact us or download the catalog.

• Civil Engineering Method
• River construction
• Coastal construction

The excavation and removal method using MJP generates no contaminated water, resulting in minimal environmental impact. It can achieve approximately 90% suction of the main diameter, allowing 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.

• Coastal construction
• Drilling Machine
• River construction

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 muddy water during excavation and transportation. By changing the equipment, excavation can be performed in narrow spaces. Additionally, excavation is possible in locations where large machinery cannot be used. 【Features】 ■ Underwater excavation method ■ Excavation, piping, and transportation within the casing ■ Suppression of muddy water generation during excavation and transportation ■ Excavation possible in narrow spaces with 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.

• Coastal construction
• Civil Engineering Method
• Earthquake-resistant construction method

The "Underwater Stud Welding System" is a system that can manage the welding condition for each bolt and allows for space-saving operations. At Nihon Ocean Services Co., Ltd., we have been researching and exploring methods for efficiently and safely dismantling 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.

• Coastal construction
• Civil Engineering Method
• Renovation and repair methods

At Nippon Marine Service Co., Ltd., we not only carry out various special construction projects but also engage in many underwater construction works, surveys, and environmental measures, all conducted safely. 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.

• Coastal construction
• River construction
• Harbor Construction

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 rotating light. 【Features】 ■ It detects and quantifies undetectable carbon monoxide using sensors, visualizes the concentration of contamination, and alerts users 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.

• Coastal construction