Hydraulic Stressing Jack Post Tension for Bridge Construction

Description of Hydraulic Stressing Jack

Hydraulic Mono Jack is multi-purpose prestressed tension equipment, easy to operate. Mainly used for single-hole tension. It can also be used for porous pretension, tension, and barrier removal, and can be applied to a variety of specifications and sizes of high-strength steel wire bundles and strands. Jack is one of the indispensable tools in tension anchorage construction of prestressed engineering. No jack can do everything. The jack structure, structure size, and tensioning tonnage limit its range of use. The front clamping jack is small in volume, light in weight, and high in efficiency. The important thing is that it is a thousand card type steel strand reserved length is short, especially suitable for high altitude or small space position of the operation.

Technical Parameter of Hydraulic Stressing Jack Jack

Components of Mono Jack

Features of Hydraulic Stressing Jack

1. Mono strand jack is mainly used for single-hole tensioning. It can also be used for porous preloading, tensioning, and troubleshooting, and can be applied to high-strength steel wire bundles and steel strands of various sizes.
2. Installation and construction are very convenient: no need to rotate the arbitrarily installed working anchor; no need to rotate the radial direction of the jack; it is easier and faster to install the tool anchor plate and tool clamp piece than the original post-card type.
3. The limit plate, tool anchor and tension jack are separated and independent.
4. Better stability: the conventional post-card tensioning jack for a 3-point piston guide, this series of tensioning jacks for a 4-point piston guide; overcome the 3-point guide eccentric tensioning force often produces the phenomenon of pulling the cylinder scrap jack.
5. It overcomes the shortcomings of cumbersome and inconvenient installation of the overall front card tensioning jack at home and abroad.

Related Accessories

Construction ​of Hydraulic Stressing Jack

Checking methods ​of Hydraulic Stressing Jack

(1) It is a relatively accurate method to calibrate the jack with the standard force juice (such as sensor, force ring, etc.) to be measured. And it is suitable for mobile units. It is recommended that the construction unit purchase sensors and a resistance strain gauge, and then make a self-made afterburner to verify the jack.
(2) Use the testing machine to check the jack. This method is a routine method used by many units.
(3) Two jacks on the item method; use a verified jack as the "standard" jack, and verify the jack by mutual jacking.

Correction requirements ​of Hydraulic Stressing Jack

(1) The jack must be marked with the name of the manufacturer, specification and model, serial number, date of manufacture, and large weighing.
(2) The surface of the jack must be complete, and no defects such as blisters, burrs, pores, and cracks that affect its quality are allowed.
(3) The measuring instruments involved in the calibration device must be within the period range and have valid verification certificates.
(4) When calibrating the jack, the oil inlet speed of the oil pump should be less than 0.1MPa/sec.