日本ピーエス List of Products and Services

"PC" is an abbreviation for Prestressed Concrete, used in the fields of civil engineering and architecture. Compared to reinforced concrete, it does not develop cracks and has excellent water tightness. Reinforced Concrete (RC = Reinforced Concrete) is made stronger by incorporating steel bars into the concrete, but it can develop cracks when subjected to very large forces. Thus, PC was developed as an even more durable type of concrete. 【Features of PC】 ■ Compared to reinforced concrete, it does not develop cracks and has excellent water tightness ■ Compared to steel members, it does not require painting ■ It has superior life cycle costs *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Materials
• Ready-mix concrete

In the conventional "cast-in-place RC structure," the influence of tidal fluctuations raises concerns regarding workability and durability due to the assembly and dismantling of formwork supports, concrete pouring, and corrosion of rebar. To address these issues, we propose a "precast PC structure." The "modular PC pier" is a type of quay wall where the main structural components, including the outer perimeter of the pile heads and the receiving beams, are assembled using precast elements that are exposed to water during construction. After assembly, prestressing is introduced to create an integrated pier structure, suitable for both new construction and renovation of existing piers. 【Features】 ■ High quality ■ Improved productivity ■ Enhanced safety ■ Environmental consideration ■ Reduced load burden *For more details, please refer to the PDF document or feel free to contact us.

• Bridge Materials
• Coastal construction
• Bridge Construction

Our company handles "PC components using blended materials." "Prestressed concrete bridges (PC bridges) using fly ash" aim to further enhance the durability of the originally high-strength prestressed concrete (PC) technology by achieving the fusion of FA + PC. "Pre-tensioned PC components made from blast furnace slag concrete" contribute to improved durability, such as resistance to chloride ion penetration, due to their high corrosion resistance from the ability to immobilize chloride ions. 【Lineup】 ■ Fly Ash ■ Blast Furnace Slag *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Materials
• Concrete admixture
• grout

The "Grout Filling Survey" using Wideband Ultrasonic Technology (WUT) involves placing a pair of transducers directly above the sheath on the concrete surface to transmit and receive wideband ultrasound, recording the waveforms. By analyzing the frequency characteristics of the sheath reflection waves obtained from the recorded waveforms, the filling condition of the grout can be determined. The use of ultrasound, which is harmless to the human body, enables safe investigations. 【Features】 ■ High precision judgment ■ Wide application range ■ Improved work efficiency ■ Ensured safety ■ Cost reduction *For more details, please refer to the PDF document or feel free to contact us.

• Non-destructive testing
• grout

"Super Pretension" is a high-performance pretension bridge realized by merging high-strength PC steel materials with high-strength concrete. Compared to JIS girders, it can reduce the girder height, enabling lightweight construction and improved seismic resistance, making it a highly versatile bridge. Furthermore, the high durability of high-strength concrete allows for an extended lifespan of the bridge, leading to reduced maintenance and management efforts, as well as future preventive maintenance measures, holding limitless potential. 【Features】 ■ Lightweight and slim ■ Improved seismic resistance and durability ■ Resource conservation and enhanced economic efficiency ■ Enhanced aesthetic appeal and design flexibility *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method
• Bridge Construction
• Bridge Materials

Our company contributes to asset management by utilizing our extensive track record and unique technology for concrete structures, which are one of the components of social infrastructure. In our surveys and diagnostics, we employ non-destructive methods to examine the internal structure of concrete without compromising its appearance, as well as conducting sample surveys and strength checks/diagnostics. Additionally, through repairs using methods such as electrical corrosion protection, we restore the functionality of structures and enhance their durability. 【Surveys and Diagnostics】 ■ Non-destructive methods - Ultrasonic method - Others ■ Sample surveys - Investigations and diagnostics using small-diameter cores ■ Strength checks/diagnostics - Load tests - Measurement and analysis of structural strain and displacement - Adhesive strength tests *For more details, please refer to the PDF materials or feel free to contact us.

• maintenance
• Renovation and repair methods
• Structural Survey

The "High-Strength PC Girder" has a lower girder height compared to other construction methods, making it suitable for bridges with girder height restrictions. By simplifying the structure, on-site construction management is made easier, and the construction period can be shortened. We have our own unique computer program for stress calculations, allowing for quick processing even under special design conditions. 【Design Examples】 ■ Pre-tensioning method ■ Post-tensioning method / Box girder type ■ Post-tensioning method / Hollow girder type *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method
• Bridge Construction

The "Precast PC Structure Pier-type Seismic-resistant Berth (Quay)" is a pier-type quay structure that consists of a lattice beam made of precast components supported by vertically driven steel pipe piles, with PC slabs laid on top and cast-in-place concrete forming a composite deck structure. Due to the use of precast components, there is no need for the assembly and disassembly of formwork and support structures at sea. Additionally, by using materials with a low water-cement ratio and high strength, the concrete becomes dense and exhibits excellent durability. 【Features】 ■ No waste materials from formwork, does not pollute seawater ■ Shortened on-site processes, enabling rapid construction ■ High quality due to reliable management and production in well-equipped locations ■ Excellent resistance to salt damage by using full prestressing ■ Dense concrete resulting in superior durability *For more details, please refer to the PDF document or feel free to contact us.

• Earthquake-resistant construction method
• Special Construction Method
• Retaining wall

Since its establishment over 60 years ago, our company has contributed to the development of the national land and local communities in Japan, focusing primarily on bridge construction. In the future, we will not only engage in new construction projects but also strive to enhance measures for the longevity of bridges, strengthen maintenance and repair technologies, and develop new technologies and methods, all while working towards creating PC structures that meet societal needs. 【Business Activities】 ■ Design and construction of prestressed concrete bridges, including expressway bridges, general road bridges, railway bridges, pedestrian bridges, bicycle bridges, aqueduct bridges, and grade-separated bridges, as well as bridge girder manufacturing. ■ Design and construction of offices, warehouses, factories, gymnasiums, baseball stadium stands, swimming pools, observation decks, etc., using prestressed concrete methods, as well as manufacturing floor slabs, side slabs, and roof panels. ■ Design and construction of rock sheds, snow sheds, rock arms, and snow shelters. ■ Design and construction of prestressed concrete reservoirs (tanks), farm ponds, box culverts, and fire water tanks. ■ Maintenance and repair work for bridges, as well as manufacturing concrete secondary products such as sleepers, track slabs, PC slabs, and sheet piles. *For more details, please contact us or download the catalog.

• others