オリエンタル白石 List of Products and Services

The "SSP Method" is a reinforcement technique that can improve the seismic performance of pile bent bridge piers under strict constraints, such as directly beneath existing structures, without the need for large-scale temporary facilities, and without significantly altering the landscape or the river's cross-sectional area. By wrapping reinforcement steel plates around existing piles and driving them in, and integrating them with the existing piles using underwater non-separating non-shrink mortar, the seismic performance is enhanced. 【Features】 - Safe construction while maintaining the use of the existing bridge - No need for large-scale temporary facilities (temporary closures, temporary piers) - Excellent cost-effectiveness - Minimal impact on the river's cross-sectional area during and after construction - Can minimize the impact on navigation routes and rivers *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

The "Pier Relief Method (Bending Reinforcement Specification)" is a seismic reinforcement method for bridge piers that uses pressed steel plates, which excel in workability and do not require large-scale excavation or earth retention, making it an economical solution for bending reinforcement. The method involves wrapping and pressing segmented reinforcement steel plates, drilling footings in the gap between the reinforcement plates and the existing bridge pier, anchoring axial reinforcing bars, and then filling with concrete to enhance seismic performance. 【Features】 - No need for large-scale temporary works (temporary closures, temporary bridges) - Excellent cost-effectiveness - Low riverbed obstruction rate - Minimizes impact on navigation routes and riverbed - Extremely minimal excavation and residual soil disposal *For more details, please refer to the PDF materials or feel free to contact us.

• Earthquake-resistant construction method

The "RSP Lift-Up Method" is a construction technique that allows for the installation of steel plate wrapping in a narrow working space without the need to demolish or remove nearby structures. Reinforced steel plates that have been divided are assembled on the ground, and using an electric hoist installed on top of the bridge pier, the reinforced steel plates are lifted. By repeating this process of lifting and assembling the next reinforced steel plate underneath the lifted one, the reinforced steel plates are installed on the bridge pier. Additionally, if the footing is located underground and excavation is not possible, the use of the pier-reflection method for the press-in section allows for the installation of steel plate wrapping without excavation. 【Features】 ■ Construction is possible with a working space of about 1.0m ■ No need for demolition or restoration of nearby structures ■ Excellent cost-effectiveness ■ Minimizes social and business losses for facilities under elevated structures ■ Uses small, divided materials, eliminating the need for large heavy machinery *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

The "STEP Method" is an economical temporary construction method that allows for the installation of sheet piles solely through excavation within the enclosure, without the need for extensive dredging. Segmented sheet piles are assembled around the structures that require investigation, repair, or reinforcement, then sunk into the riverbed and driven to the necessary depth using a jacking system. In conjunction with the driving process, the soil inside the sheet piles is excavated, and after installing water-stopping measures and supports, the area inside the sheet piles is drained to secure a dry working space. 【Features】 ■ Can be transported and installed in segments ■ Minimal impact on rivers ■ Compatible with various structural forms and shapes ■ No need for large-scale dredging or processing ■ Fewer constraints from under-bridge spaces and construction machinery *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods

The "SLJ Slab - For Port Piers" improves the workability of the joint section compared to loop joints by using end band joints at the connection points of precast slabs. It is widely adopted for precast slabs of highway bridges that require fatigue durability under harsh conditions. Additionally, it allows for a reduction in slab thickness. 【Features】 - Applicable to the end face of post-tensioned two-way PC slabs - Allows for shorter joint lengths compared to overlapping joints - Joint length is 15 times the diameter of the rebar for both uncoated and epoxy-coated rebar - Compatible with rebar diameters D16, D19, and D22 - Also compatible with stainless steel rebar SUS304 *For more details, please refer to the PDF document or feel free to contact us.

• others
• Renovation and repair methods

The "NAPP Anchor Method" is a construction technique that involves placing NAPP units in drilled holes of existing concrete structures and introducing prestress to bond the existing concrete with new concrete. There are no gaps at the joint sections, and it offers excellent durability. Depending on the conditions, the new section can also be made of precast blocks. 【Features】 - Reliable introduction of prestress - Labor-saving and reduction of construction time - Fewer drilled holes compared to rebar - Surface treatment of joint sections can be done with minimal cleaning, resulting in almost no noise *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods

The "NAV-G Method (UV Specification)" allows for the formation of a highly transparent FRP on concrete surfaces by applying and impregnating acrylic resin adhesive onto a special fiber sheet, enabling the observation of new crack occurrences and serving as a new method for preventing peeling. It ensures transparency that is not found in conventional peeling prevention methods, with expectations for sustained visibility over the long term. 【Features】 ■ Visibility ■ Shortened construction period ■ Weather resistance ■ Mechanical properties ■ Applicability in construction *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods
• others

Transparent concrete coating. A coating that allows the concrete surface to be seen through. The 'NAV-G method (UV specification)' enables the formation of a highly transparent FRP on the concrete surface by applying and impregnating an acrylic resin adhesive onto a special fiber sheet, allowing for the observation of new crack occurrences and other issues, making it a new type of peeling prevention method. It ensures transparency that is not present in conventional peeling prevention methods. Long-term visibility is expected. 【Features】 ■ Visibility ■ Shortened construction period ■ Weather resistance ■ Mechanical properties ■ Applicability in construction *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods
• others

The "PC-Rev Method" is a technique for re-injecting grout into existing structures that lack durability due to insufficient filling of PC grout, aiming for regeneration. By using a super low-vibration drill for boring, it does not cause harmful damage to the surrounding area. Additionally, by utilizing a small diameter hole of φ15.5mm, it reduces the load on the structure. The pressure changes in a vacuum container connected to the sheath allow for accurate estimation of the cavity volume inside the sheath, enabling appropriate injection management. 【Features】 ■ Automatic stop of drilling upon detecting contact with the sheath ■ Accurate estimation of the cavity volume inside the sheath ■ Vacuum pump reduces pressure inside the sheath for grout injection ■ Proper management of injection speed, followed by pressurization at the end ■ Reduction of load on the structure and improvement of grout filling properties, etc. *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods
• Concrete construction

〇 Completion of Evaluation for the Public-Private Partnership New Technology Research and Development Project by the Ministry of Agriculture, Forestry and Fisheries 〇 Winner of the Grand Prize in the Technology Development Category at the 4th Infrastructure Maintenance Awards 〇 Product Features - High Productivity: Carbon backing with strand sheets processed and hardened in the factory can be easily applied on-site - Excellent Adhesion: Special primer that exhibits excellent adhesion in wet environments - Low Roughness Coefficient: 0.0104, National Agriculture and Food Research Organization - Long-term Wear Durability: 0.32 mm/40 years, tested and measured by a university institution - Water Quality Safety: Passed by the Japan Water Works Association, JWWA K143 - Water-Flow Type Anchor with Check Valve: Eliminates adverse effects of back pressure from water.

• Tunnel Materials
• Renovation and repair methods
• Reinforcement and repair materials

The "CFCC Slab" is a precast PC slab that uses CFCC (carbon fiber composite cable), a corrosion-resistant structural material, as the tensioning material, introducing prestress in two directions: the span direction of the slab and the bridge axis direction. It corresponds to "Method 3" for ensuring durability as specified in the Road Bridge Design Guidelines, and from the perspective of ensuring durability and reducing LCC, its use in harsh salt damage environments, such as near coastlines or areas where freezing prevention agents are spread, is anticipated. 【Structural Features】 ■ Corresponds to "Method 3" for ensuring durability as specified in the Road Bridge Design Guidelines ■ No need to increase the cover thickness (increase in slab thickness) in salt damage environments ■ 6% weight reduction compared to PC slabs of the same thickness (unit volume weight 23.0 kN/m3) ■ The anchorage parts are also made of non-metallic materials *For more details, please refer to the PDF materials or feel free to contact us.

• Reinforcement and repair materials

The "SP Clamp Method" is a construction technique for replacing the deck of a simple PC composite girder bridge using precast PC deck slabs while maintaining the load-bearing capacity of the existing structure. By cutting the existing main girder stirrups and crimping a fixed steel pipe to their ends, the functionality of the stirrups is preserved. Additionally, by extending the stirrups through steel pipe crimping at the cutout sections of the PC deck slab, it is possible to maintain the necessary load-bearing performance against the lateral movement of the main girder web. 【Features】 ■ Enables rapid replacement of the PC composite girder deck without compromising the specified load-bearing performance of the existing main girder, utilizing precast PC deck slabs. ■ The use of wire sawing methods during the removal of the deck from the top of the main girder allows for a reduction in construction time. ■ This method is based on the premise of removing the upper edge rebar of the deck, including the hook section of the main girder stirrups, which are at high risk of corrosion due to the application of anti-freezing agents on the road surface. ■ The reliability of ensuring durability performance is improved. *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

The SCBR method (Smart Connected Bridge) is a construction technology for concrete bridges that offers benefits such as alleviating labor shortages, reducing on-site work, and ensuring high quality through factory production. By using this method, it is possible to replace deteriorated RC hollow slab bridges in a short period while utilizing existing bridge piers, such as two-column types. It is also adopted to reduce noise through jointless bridge construction and simplify maintenance management. 【Features】 ■ Shortened construction period ■ Reduced regulations and costs ■ Easier maintenance management ■ Preservation and consideration of landscape, etc. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method
• Bridge Construction
• Bridge Materials

The "Residual Prestress Estimation Method by Core Cutting" is a construction method that eliminates the effects of drying shrinkage and creep strain, achieving a more accurate estimation of "residual prestress." By utilizing the difference between the release strain in the direction of prestress and the release strain in the perpendicular direction, the majority of the strain components caused by internal restraint are eliminated, and for the components that cannot be eliminated, they are removed using our company's devised calculation formula. 【Features】 ■ Measures strain in two directions and calculates using our devised formula ■ Patent No. 5095258 ■ The machine height for core drilling is approximately 70 cm ■ Core diameter φ50 ■ Cutting depth is only 18 mm *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

Precast components made using dense, high-strength concrete and produced under advanced quality control. Prestressed concrete technology that withstands heavy loads and reduces deflection and cracking. "Precast Prestressed Concrete (PCaPC)" is a construction method that integrates the advantages of precast (PCa) components and prestressing (PC) on-site, creating buildings with excellent vibration resistance and durability. 【Features】 - Combines the characteristics of PCa and PC to provide safe and reliable concrete structures with excellent vibration resistance and durability. - Reduces on-site construction time, minimizes industrial waste generated on-site, and decreases noise and dust. - Offers buildings with excellent life cycle costs (LCC) due to increased longevity. - Adapts to changes in residents' lifestyles through SI (Skeleton-Infill) housing that utilizes highly durable and long-lasting PCaPC construction. *For more details, please refer to the PDF document or feel free to contact us.

• Housing structure technology/long-term superior housing technology
• Steel structure construction

The "ORS External Frame Method" is a construction technique that enhances the seismic resistance of buildings by creating a seismic frame using columns and beams (precast components) manufactured in a factory and newly installed outside the building. This method combines the advantages of precast components and prestressed concrete, allowing for high seismic performance in buildings. Since the construction is completed on the exterior of the building, residents can continue their daily lives while the work is being done. Additionally, it eliminates the need for relocation compensation for residents, reducing costs and effort. 【Features】 ■ Can withstand large earthquakes ■ Allows continued use of the building during construction ■ Can shorten on-site construction time ■ Can change the exterior appearance ■ Minimally impacts the internal space *For more details, please refer to the PDF materials or feel free to contact us.

• Housing structure technology/long-term superior housing technology
• Vibration isolation, vibration control, and earthquake resistance construction
• Earthquake-resistant construction method

The "PCR Method for Roads" is a construction technique that allows for the parallel advancement of small-element PCR girders underground while utilizing the railway and road above. This method introduces prestressing to safely and reliably construct crossing structures without excavation. Depending on the support method of the PCR girder and the arrangement of PC steel materials, various forms such as lower girders, box-shaped tunnels, and circular tunnels can be selected. Since it is a pushing method using small elements, the thrust force is small, resulting in a compact reaction force facility. 【Features (Constructability)】 ■ Minimal impact on the upper road surface ■ Small thrust force, leading to a compact reaction force facility ■ No transportation of soil ■ Capable of handling gravel, cobblestones, and obstacles, ensuring high pushing accuracy ■ Smaller work yard can be accommodated *For more details, please refer to the PDF materials or feel free to contact us.

• Earthquake-resistant construction method

The "Lightweight Insulation Eco Sheet Double" has excellent thermal insulation properties, making it an effective curing sheet for winter concrete placement and situations where early concrete strength development is required. It has high insulation capabilities, allowing for a reduction in the use of steam and heaters, contributing to a decrease in environmental impact (CO2 reduction). 【Features】 ■ Lighter than conventional products, improving workability ■ Excellent moisture retention and thermal insulation, promoting early strength development of concrete ■ Contributes to reducing CO2 emissions by decreasing the use of steam and heaters (fuel) ■ Expected to suppress cracking due to temperature differences inside and outside the concrete *For more details, please refer to the PDF document or feel free to contact us.

• Concrete curing material
• Bridge Materials
• Bridge Construction

The "Wall Railing Curing Sheet" is a curing sheet specifically designed for the wall railings of bridge superstructures. It is large and utilizes industrial plastic fasteners. It is recommended for areas where "temperature drops significantly during winter and at night," as well as for sites "using nets for debris prevention" and "where there are concerns about the connection and sealing of curing sheets due to the length of the wall railing construction." 【Features】 ■ Sealing properties ■ Insulation properties ■ Safety and workability ■ Reduced environmental impact (CO2 reduction) *For more details, please refer to the PDF materials or feel free to contact us.

• Concrete curing material
• Reinforced concrete construction
• Concrete construction

"Pacific Pre-Eurox AS" is a non-shrink mortar based on a general-purpose non-shrink mortar, which enhances its density and improves salt resistance by pre-mixing aluminosilicate-based admixtures and fine blast furnace slag powder. It is particularly suitable for use in coastal areas where measures against salt damage are required, such as exposure to airborne salt and the application of de-icing agents. Furthermore, its physical properties meet the standards for non-shrink mortars as described in the construction management guidelines of the East, Central, and West Japan Expressway companies. 【Features】 ■ Suppression of salt penetration ■ Non-shrink ■ Flowability and strength development ■ Quality stability *For more details, please refer to the PDF document or feel free to contact us.

• Mortar and plaster materials
• Premixed mortar

The "IH (Induction Heating) Device System" is a system that combines the "RPR1650 System" developed by Norway's RPR Technology with the "Cooling Water Supply Unit" manufactured by Nihon Bridge Co., Ltd., designed to strip existing paint from steel bridges. The benefits of the IH device are threefold: "reduction of environmental impact and ensuring worker safety," "efficiency in work speed," and "reduction of industrial waste." It can be used for various applications beyond just steel bridges. 【Benefits of the IH Device】 ■ Minimizes dust dispersion ■ Allows for safe and hygienic stripping ■ Can strip paint in a flat manner in one operation ■ Industrial waste consists only of the stripped paint ■ Significantly reduces waste disposal costs *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

"JB-HABIS" is an inspection path for bridges made from high corrosion-resistant steel material ZAM(R) in the form of steel plates, shapes, and pipes. Performance verification tests and impact loading tests in accordance with NEXCO testing methods have been conducted on the walkway beams and handrails, confirming sufficient safety. Additionally, since the materials are processed (cut and drilled) by the material manufacturer and assembled solely with bolt connections, welding during production is unnecessary. This eliminates distortion due to thermal effects during manufacturing, allowing for the provision of products with high dimensional accuracy. 【Features】 ■ Excellent corrosion resistance ■ Uses ZAM(R) treated with pre-galvanization for rust prevention ■ No post-galvanization rust prevention treatment required during manufacturing ■ High dimensional accuracy and lightweight ■ Low lifecycle cost * "ZAM(R)" is the product name for a molten zinc-aluminum (6%)-magnesium (3%) alloy coated steel sheet developed by Nisshin Steel Co., Ltd. * For more details, please refer to the PDF document or feel free to contact us.

• Scaffolding and Support Materials
• Guarding aisles and loading areas

All of our factories have received registration for the new JIS certification, promoting thorough standardization and quality management, and have obtained ISO 9001 and 14001 certifications. The factory products manufactured through well-equipped facilities and consistent production processes are always of high quality and high performance. The introduction of new equipment, such as the automatic steam curing management system, contributes to the development of social infrastructure and economic efficiency. The main manufacturing items include civil engineering, bridges, underground structures, and building components, with factories located in "Kanto," "Shiga," and "Fukuoka." 【Main Factory Equipment】 ■ Batching Plant ■ Plant Control Room ■ Production Line (Reinforcement Assembly) ■ Tensioning Device ■ Steam Curing Device ■ Steam Curing Management System *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Materials
• Other flooring materials
• Basement unit/disaster prevention shelter

The "floating pier" consists of a main PC floating body (pontoon), a connecting bridge that links the shore to the pontoon, a bridge that connects pontoon to pontoon, and mooring lines that anchor the pontoon. Since the floating pier rises and falls with the tide, there is no change in height difference with vessels, making it easy to load and unload cargo and passengers. Additionally, the PC floating pier is highly stable due to its weight, enhancing convenience. In recent years, there have also been examples of larger constructions. 【Features】 ■ Capable of constructing large floating bodies ■ Can reduce the height of the floating body ■ Controls cracking ■ Uses high-quality concrete ■ Superior durability compared to reinforced concrete *For more details, please refer to the PDF materials or feel free to contact us.

• others
• Bridge Construction

The "PC pier" features a reinforced concrete beam placed on the heads of steel pipe piles, with precast PC girders installed on top of the beam and secured laterally to form the deck structure. Due to the use of high-quality concrete, it offers excellent durability. Additionally, the use of precast PC girders for the deck allows for a reduction in the duration of offshore work. 【Features】 ■ Lightweight superstructure ■ Shortened offshore work period ■ Longer spans for the deck ■ Reduced number of steel pipe piles ■ Excellent seismic resistance *For more details, please refer to the PDF document or feel free to contact us.

• others
• Bridge Construction

At Oriental Shiraishi, we are further strengthening our efforts in the diversifying fields of repair and reinforcement by advancing our technical expertise based on extensive knowledge, experience, and a wide range of comprehensive engineering and technology. As we enter the era of renewal, we are developing new technologies and methods to meet your needs, focusing on our areas of expertise in repair and reinforcement of PC technology and foundation technology. 【New Technologies and Methods (Excerpt)】 ■ Seismic reinforcement of column-type foundations - Kui Taishin-SSP method - PC Well-Refre method ■ Seismic reinforcement of bridge piers - Pier-Refre method - Pier-Refre method (bending reinforcement specification) - RSP Lift-Up method, etc. *For more details, please refer to the PDF materials or feel free to contact us.

• others
• Special Construction Method

"Prestressed Concrete (PC)" literally means "concrete that has been pre-stressed." PC structures are composed of concrete members reinforced by applying compressive stress with high-strength steel, resulting in lightweight, high-quality, and durable structures. Our company is committed to the development of construction techniques for the "Prestressed Concrete Method." We have a wide range of expertise in various structures, including bridges, buildings, containers, port structures, and underground structures, and we have constructed many PC structures. [Our Achievements] - We have handled over 20,000 PC structures. - We have constructed a wide range of projects, from small to large scale. - We have built many PC structures, including bridges, buildings, containers, port structures, and underground structures. - In addition to construction, we have developed various technologies for investigating, repairing, and reinforcing PC structures to protect and utilize them. *For more details, please refer to the PDF materials or feel free to contact us.

• others