Five-layer rust prevention! A highly reliable anchoring method for preventing toppling and uplift in mid- to high-rise buildings.
The "KTB Vertical Ground Anchor Method" uses fully rust-proof strands for tendons, equipped with ultra-rust prevention features, effectively functioning for seismic reinforcement, preventing toppling, and preventing uplift. It reliably transmits the designed anchor force to the ground, forming an extremely safe permanent anchor body. You can choose between two permanent anchor methods: the "KTB Load Distribution Type Permanent Anchor" and the "KTB Tension Type SC Permanent Anchor," both of which have obtained technical review certification from a Ministry of Land, Infrastructure, Transport and Tourism accredited organization. 【Features】 ■ Maintains stable pull-out resistance ■ Excellent corrosion resistance ■ Construction and economic efficiency tailored to ground conditions ■ Ease of maintenance and management ■ Permanent anchor methods with technical review certification For more details, please refer to the catalog or feel free to contact us.
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basic information
【Specifications for Complete Rust Prevention Tendon】 [All Steel Wire Double Rust Prevention Unbonded Strand] ■ Ducst Unbonded (Duc-U1): Five Layers of Rust Prevention - All steel wires are rust-proofed with a zinc-coated layer (primary rust prevention layer) and an epoxy resin coating (secondary rust prevention layer), resulting in all steel wire double rust prevention PC steel strand. - Further processed as unbonded for complete rust prevention. ■ Ducst Unbonded (Duc-U2): Six Layers of Rust Prevention - All steel wires are rust-proofed with a zinc-coated layer (primary rust prevention layer) and an epoxy resin coating (secondary rust prevention layer), resulting in all steel wire double rust prevention PC steel strand. - Further processed as double unbonded for complete rust prevention. [All Steel Wire Coated SC Unbonded Strand] ■ SC Unbonded (SC-U1) / SC Unbonded (SC-U2) - Each core and side wire of the PC steel strand is coated with epoxy resin powder for rust prevention. - Further processed as unbonded to enhance the corrosion resistance function. *For more details, please refer to the catalog or feel free to contact us.
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Applications/Examples of results
【Construction Examples】 [Prevention of Uplift due to Groundwater Pressure] ■ Reconstruction of Tokyo Metropolitan Bunkyo School for the Blind - Ground anchor work for the gymnasium, which is entirely buried underground ■ Underground Water Countermeasures at Tokyo Station - Installation of 130 vertical ground anchors penetrating the platform and base slab ■ Underground Water Countermeasures at Ueno Station - Installation of over 600 vertical ground anchors during nighttime work [Prevention of Tipping During Earthquakes] ■ New Construction of Dowel Fuchu Honcho - Use of complete rust prevention and Ducst unbonded tendons ■ New Construction of 3-Chome Maesato Town Apartment - Thorough seismic measures taken to construct a tall building on a narrow site [Seismic Reinforcement and Pull-Out Resistance] ■ Seismic Renovation Work at Ehime University Comprehensive Education and Research Building - Combination of seismic frames with vertical ground anchors ■ Seismic Reinforcement Work at Kyoto Institute of Technology Building No. 6 - Direct construction on the foundation of the existing building to enhance pull-out resistance *For more details, please refer to the catalog or feel free to contact us.
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Company information
KTB Corporation sells "SC Strand," a completely rust-proof product coated with epoxy resin on each core and side wire of PC steel strands, and also engages in the sale of materials related to civil engineering works such as bridges and ground anchors.