







1. Definition and Function
The prestressed flat anchor clip for bridges serves as an indispensable anchoring powerhouse in the bridge's prestressed systems. By tensioning the prestressed steel strands, it preloads the structure magnificently, thereby amplifying the bridge's load-bearing prowess and crack-defying strength. This clip, with its strategic positioning against the steel strand, employs the ingenious wedge principle to securely clamp the steel strand post-tensioning, anchoring it immovably to the anchor plate, thus preserving the crucial prestress.
2. Structure and Principle
• Structure: Elegantly designed in a conical frustum shape, the clip exhibits a refined small upper part, transitioning to a robust large lower section. The inner hole is meticulously crafted with precise threads or tapered threads, ensuring a snug embrace with the steel strand. This outer conical surface harmoniously aligns with the flat anchor plate's inner conical hole. Ingenious machining slots, typically 3-5mm deep, grace the larger end, while pinholes at the smaller end, meticulously aligned perpendicular to the outer wall, house three strategically positioned pins.
Principle: In the choreography of prestressing, the jack orchestrates tension upon the steel strand. Upon achieving the calculated tension, the clamp elegantly wedges itself inward between the tapered hole of the anchor plate and the steel strand, catalyzed by the strand's retraction. Through the symphony of frictional forces between the clamp and its allied components, the steel strand is steadfastly anchored, thus maintaining the vital prestressing.
3. Material and performance requirements
Material: Forged from robust alloy steel, the clip boasts formidable strength, enduring hardness, and commendable toughness, ensuring immunity to brittle fractures or detrimental deformations even under colossal stress.
Performance requirements: The clip must exude unparalleled anchoring reliability, ensuring the steel strand remains steadfast without slipping or loosening. Exceptional anti-fatigue attributes are crucial, allowing it to thrive in ever-demanding bridge environments subjected to relentless vehicle loads and other strains. Moreover, a degree of corrosion resistance is essential to prolong its service longevity.
4. Application scenarios
This anchor clip shines in slab structure bridges, artfully accommodating prestressed steel strands in a flat formation, preventing unnecessary plate thickness due to cable arrangements. It is indispensable in urban elevated bridge decks, compact prestressed concrete slab bridges, and similar structures, asserting its role in modern infrastructure.
5. Key points of construction
Pre-installation inspection: Vigilant inspection of the clip's surface quality is imperative, ensuring flawless integrity with no signs of cracks or burrs. The seamless fit between the clip and the anchor plate's tapered hole is crucial, guaranteeing smooth and secure engagement.
Installation process: Meticulously position the clip within the anchor plate's tapered hole, assuring an even distribution and immaculate contact with the steel strand, setting the stage for optimal performance.
• Tensioning operation: Adhere rigorously to the meticulously designed tensioning program and procedures. Vigilant observation during tensioning is paramount to avert issues like misalignment or jamming of the clamps. Post-tensioning, a thorough check of the clamps' anchoring efficacy is essential to validate the steel strands' secure anchorage.