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

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.

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.

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.

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.

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.

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.

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.

"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.

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.

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.

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.

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.

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.