Tension jack

Tensioning jacks are special equipment used to tension prestressed tendons such as steel strands and steel bars in various engineering structures. They are widely used in prestressed construction fields such as bridges, tunnels, and high-rise buildings. Its core advantages and features are as follows:

Core features and benefits

1. High-precision tensioning

It is driven by a hydraulic system and combined with precision pressure gauges or sensors to achieve precise control of the tension load (the error is usually ≤±1%), ensuring that the prestress application meets the design requirements.

Some smart jacks support digital control, display tension data in real time and automatically generate reports, improving construction accuracy and management efficiency.

2. Compact structure and strong applicability

It is small in size and light in weight, making it easy to operate in small spaces (such as inside box beams and high-rise building floors).

It can be adapted to various specifications of prestressed bars (such as Φ15.2 steel strands, precision-rolled threaded steel bars), and can meet different engineering needs by replacing anchors or accessories.

3. Stable

The hydraulic system has strong power and fast tensioning speed. A single jack can complete tensioning loads from tens of thousands of Newtons to hundreds of tons, greatly shortening the construction period.

Made of high-strength alloy steel, key components (such as cylinders and pistons) have undergone wear-resistant treatment and have strong fatigue resistance, making them suitable for long-term and high-frequency use.

4. Good safety

Equipped with overpressure protection devices (such as overflow valves) to prevent accidents caused by excessive system pressure; some models are equipped with anti-rebound mechanisms to avoid sudden retraction of prestressed tendons after tensioning is completed.

The operation interface is simple and intuitive, equipped with manual/automatic switching function, which can quickly unload the load in emergency situations to ensure the safety of construction workers.