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Prestressed Material
Hydraulic Stressing Jack for prestressing strands in post tension and pre-tension areas.
Hydraulic Stressing Jack includes the jack for multi-strands and the jack for mono strand.
We produce a center hole type jack, the model is YCW, which is for stressing multi strands, also we are in the position to produce a front clam jack, which is for stressing mono strands.
A hydraulic stressing jack is used primarily in construction and engineering for prestressed concrete structures. Prestressing is a technique used to strengthen concrete by introducing compressive stress to counteract tensile stresses that occur when the structure is subjected to loads.
The hydraulic stressing jack consists of a hydraulic cylinder, a piston, and a pumping system. It works by applying a force to stretch high-strength steel cables or rods, known as tendons, which are placed inside ducts or sleeves embedded in the concrete. As the jack applies force, the tendons elongate, causing the concrete to compress. Once the desired level of compression is achieved, the tendons are anchored, and the jack is released.
ADVANTAGES
This process creates a pre-compression in the concrete, which increases its resistance to tensile forces, such as those caused by bending or external loads. Prestressed concrete is commonly used in bridges, buildings, parking structures, and other large-scale infrastructure projects where high strength and durability are required. The hydraulic stressing jack plays a crucial role in ensuring the effectiveness and safety of prestressed concrete elements.
Hydraulic Stressing Jack Advantages
- small size
- light weight
- good sealing performance
- high strength and reliability, and strong universality
Hydraulic Stressing Jack Features
High Load Capacity: Capable of exerting significant force to tension tendons.
Hydraulic System: Uses oil or hydraulic fluid to generate and control tension.
Precision: Allows for precise control of the stressing process.
Safety Features: Typically equipped with safety mechanisms to prevent overload or failure.
USE
Hydraulic stressing jacks are used in various applications within the construction and engineering industries, primarily for prestressing concrete structures.
● Bridges: Hydraulic stressing jacks are frequently employed in the construction of prestressed concrete bridges. They are used to tension the steel tendons that run through the bridge beams or segments, thereby imparting compressive forces to the concrete.
● Buildings: In high-rise buildings and other large structures, hydraulic stressing jacks are used to prestress concrete floor slabs, beams, and columns. This enhances the load-carrying capacity and reduces the risk of cracking under heavy loads.
● Parking Structures: Prestressed concrete is often used in parking garages and structures where large spans and heavy loads are common. Hydraulic stressing jacks are used to apply the necessary force to prestress the concrete elements, ensuring structural integrity and longevity.
● Railway Sleepers: Prestressed concrete sleepers (railroad ties) used in railway tracks benefit from prestressing to withstand the dynamic loads of passing trains. Hydraulic stressing jacks are employed to tension the tendons within the sleepers during manufacturing.
● Repair and Retrofitting: In existing structures, hydraulic stressing jacks can be used for repair and retrofitting purposes. They can help restore or enhance the structural capacity of aging or damaged concrete elements by applying additional prestressing force.
● Pre-stressed Concrete Pipes: Hydraulic stressing jacks are used in the production of prestressed concrete pipes, which are commonly used in drainage systems, culverts, and sewage pipelines. Tensioning the steel wires or strands inside the pipes helps improve their strength and durability.
SPECIFICATIONS
The YCW C series jacks for stressing multi strands are the fourth generation lightweight jacks successfully launched by our company after further improving and optimizing the structure and size based on the third generation jacks. It has a small size, light weight, good sealing performance, high strength and reliability, and strong universality, making it a replacement product for the third generation of jacks.
Widely used in post tensioning prestressed construction, with different components, it can tension clamp type group anchors, DM type pier head anchors, and LZM type cold cast anchors of different systems. Widely used in pre tensioned and post tensioned prestressed concrete structures, components, bridges, power stations, highways, high-rise buildings, geotechnical anchoring, dam foundation anchoring and other construction projects.
| Item | Nominaltensioning force (KN) | Nominal oil pressure (KG) | TensilePiston Area(m2) | Area of drawback piston (m2) | Return oil pressure (mpa) | Diameter of center hole (mm) | Tensioning stroke (mm) | Weight of main unit (kg) | Overalldimension of main unit (mm) | Dimension of fixing nut seam allowance (mm) | Dimension of piston seam allowance (mm) |
| Model | |||||||||||
| YCW60B | 600 | 52 | 1.15×10-2 | 0.41×10-2 | ≤25 | Φ60 | 200 | 44 | Φ170×340 | Φ102 | Φ90 |
| YCW80A | 799 | 53 | 1.508×10-2 | 0.471×10-2 | ≤25 | Φ65 | 200 | 55 | Φ200×343 | Φ102 | Φ102 |
| YCW100C | 973 | 51 | 1.91×10-2 | 0.78×10-2 | ≤25 | Φ78 | 200 | 65 | Φ216×349 | Φ149 | Φ130 |
| YCW150C | 1511 | 50 | 3.02×10-2 | 1.61×10-2 | ≤25 | Φ102 | 200 | 111 | Φ280×366 | Φ170 | Φ156 |
| YCW200C | 1960 | 52 | 3.77×10-2 | 1.84×10-2 | ≤25 | Φ120 | 200 | 135 | Φ310×310 | Φ196 | Φ176 |
| YCW250C | 2479 | 54 | 4.59×10-2 | 2.80×10-2 | ≤25 | Φ140 | 200 | 183 | Φ350×369 | Φ210 | Φ186 |
| YCW300C | 3000 | 52 | 5.77×10-2 | 3.13×10-2 | ≤25 | Φ145 | 200 | 217 | Φ385×370 | Φ252 | Φ216 |
| YCW350C | 3497 | 54 | 6.480×10-2 | 3.46×10-2 | ≤25 | Φ175 | 200 | 268 | Φ415×390 | Φ252 | Φ252 |
| YCW400C | 3955 | 52 | 7.610×10-2 | 4.60×10-2 | ≤25 | Φ175 | 200 | 278 | Φ440×390 | Φ252 | Φ252 |
| YCW500C | 4924 | 49 | 10.05×10-2 | 4.77×10-2 | ≤25 | Φ196 | 200 | 385 | Φ490×423 | Φ302 | Φ302 |
| YCW600C | 6050 | 50 | 12.10×10-2 | 6.83×10-2 | ≤25 | Φ196 | 200 | 590 | Φ530×443 | Φ362 | Φ302 |
| YCW650C | 6500 | 46 | 14.33×10-2 | 6.29×10-2 | ≤25 | Φ215 | 200 | 617 | Φ575×465 | Φ362 | Φ362 |
Single mono strand jack
According to the different requirements for the diameter, tension value, and equipment weight of prestressed steel strand, there are three main specifications of jacks for tensioning a single prestressed steel strand: YDC260QX type, YDC360Q type, and YDCSOOQ type, all of which are through center front clamp jacks. Among them:
1. The YDC260QX jack is mainly used for pre tensioning and tensioning of M15 and M13 anchoring series prestressed tendons;
2. The YDC360Q jack is mainly used for pre tensioning and tensioning of M18 anchoring series prestressed steel tendons;
3. The YDC500Q jack is mainly used for pre tensioning and tensioning of M22 anchoring series prestressed steel tendons;
| Item | Nominaltensioning force (KN) | Nominal oil pressur e (KG) | TensilePiston Area(m2) | Area of drawback piston (m2) | Diameterof center hole (mm) | Tensioning stroke (mm) | Overalldimension of main unit (mm) | Weight of main unit (kg) | The strand diameter could be pressed,mm | Reserved length of steel strand ,mm | Oil Pump |
| Model | |||||||||||
| YDC260QX | 262 | 55 | 4.771×10-3 | 1.335×10-3 | Φ18 | 200 | Φ115X484 | 24 | 15.24,12.7 | 250 | ZB4-500 |
| YDC360Q | 361 | 54 | 6.696×10-3 | 2.298×10-3 | Φ22 | 200 | Φ130X482 | 34 | 17.8 | 250 | ZB4-500 |
| YDC500Q | 507 | 51 | 9.950×10-3 | 1.960×10-3 | Φ30 | 200 | Φ155X487 | 49 | 21.7 | 250 | ZB4-500 |
PACKAGE
Package:
By strong wooden box, suitable for sea shipments, and air transportation.
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