Post Tension Cable Grip Wedge

Application fields

Post Tension Cable Grip Wedge are almost the key components in all concrete structures that require large spans, high load-bearing capacity, and high durability.

（1）Transportation infrastructure

• Bridge projects (for roads, railways, urban overpasses)

• Rail transit (light rail, subway)

• Ports and docks

Anchor prestressed steel strands to enhance structural load-bearing capacity and crack resistance, and extend service life.

（2）Architecture and Civil Engineering

• High-rise and super-high-rise buildings

• Large public buildings (sports venues, convention centers)

• Industrial workshops and warehouses

• Heavy object lifting and structural reinforcement

The Post Tension Cable Grip Wedge are used in critical structures that bear huge loads and are also employed in the renovation and reinforcement of existing buildings.

（3）Energy and industrial facilities

• Wind power generation (foundation anchoring of wind turbine towers)

• Nuclear power plants (special structures such as containment vessels)

• LNG storage tanks (low-temperature prestressed concrete)

• Foundations of large industrial equipment

To ensure their stability under cyclic loads such as strong winds

（4）Hydroelectric and water conservancy projects

• Dams and hydropower stations

• Slope and tunnel reinforcement

• Underground engineering

Reinforce the dam body, rock mass of steep slopes, and tunnel surrounding rock to prevent landslides and collapses.

（5）Special and emerging fields

• Geotechnical and foundation reinforcement

• Structural repair and renovation

• Anti-magnetic and anti-corrosion engineering

Applied to foundation reinforcement, bridge bearing replacement, building alignment correction, etc. In special environments, it can be used in combination with FRP (fiber-reinforced composite materials) bars.

Core Function

Post Tension Cable Grip Wedge is a crucial anchoring component in post-tensioned prestressed concrete structures. Its core functions can be summarized as follows:

（1）Clamping and anchoring of steel strands

After the prestressing tendons have been tensioned, the wedge blocks firmly clamp the steel strands (or steel wire bundles), preventing them from retracting or slipping, and locking the tension force at the anchoring end.

（2）Transmitting prestress to the concrete structure

The Post Tension Cable Grip Wedge transfer the tension of the steel strands to the anchor plates, which then pass the force through the anchor pad plates to the concrete components, thereby establishing long-term effective prestress throughout the structure, enhancing the crack resistance, stiffness and load-bearing capacity of the structure.

（3）Achieving "self-locking" and "anti-loosening"

By leveraging the wedge-shaped geometric characteristics, a self-locking effect is generated between the wedge block and the anchor plate's conical hole when subjected to force - the greater the tensile force, the tighter the wedge block is clamped, thereby ensuring that the structure will not loosen during its service period.