Post-tensioning system
OVM specializes in designing, manufacturing, and installing reliable post-tensioning systems. Our solutions adhere to international standards and are suitable for both new and existing structures
OVM post-tensioning systems for special structures
The OVM Special Post-Tensioning Systems are designed for demanding structural applications requiring high-performance solutions in industries like construction, nuclear energy, water conservancy, and cryogenics. These systems include advanced anchoring technologies and offer specialized applications in environments such as round prestressed concrete structures, nuclear reactors, and LNG storage projects.
1. Ring Anchoring System OVM.HM
The OVM.HM Ring Anchoring Systemis a highly specialized technology used in the construction of prestressed concrete (PC) structures, specifically designed for various demanding applications such as large tanks, reactors, and underground tunnels. The system is designed to apply prestressing forces to ring-shaped structures and offers advanced solutions for both bonded and unbonded post-tensioning techniques.
Key Features:
- Round PC Storage Tanks:
- PC Containment for Nuclear Reactors:
- Hydrodynamic Tunnels and Wells:
- Other Similar Prestressed Concrete Structures:
The ring prestressing tendon is anchored at both ends (stressing end and dead end) within the anchor head. The anchor head serves as a coupler, and a special deviating device is used to facilitate tensioning of the tendons, especially when deviator components (like Deviator A and B) are used to direct the tendons through the structure.
Fully Leak-tightness Ring Anchoring System-HM15A (Unbonded Strand)
HM15A ring anchorage with super corrosion resistance that is specially developed for water conservancy and high corrosion engineering. The ring anchorage uses a double axial extrusion seal and radial seal structure to form an independent anti-corrosion structure on each strand of steel.
Key Features:
Corrosion Resistance: This system is designed with an emphasis on extreme durability, particularly for water conservancy and highly corrosive environments. It features a double axial extrusion seal and radial seal structure that provides anti-corrosion protection for each steel strand, which is essential in harsh conditions.
Leakproof: After immersion in 3 meters of hydrostatic water for 96 hours, the system showed no leakage, making it highly reliable for water-related infrastructure.
Friction Loss: The unbonded strand system has lower friction loss compared to bonded prestressing, making it a more efficient option for certain applications.
Construction Efficiency: The design of the anchoring system is optimized for quicker installation and tensioning, which shortens the overall construction timeline.
Post-tensioning system for Nuclear power plant
The OVM Post-Tensioning (PT) system is engineered to meet the stringent requirements of nuclear power plant construction, particularly for third-generation nuclear containment structures. These structures require high-strength prestressing solutions to ensure durability, resistance to extreme loads, and long-term stability.
Key Features:
It is used in third-generation nuclear containment structures, where the integrity of the concrete must be assured under high-stress conditions.
Special Tension Jacks for Nuclear Anchors: These are provided for precision tensioning of the tendons, ensuring that the prestressing forces are applied correctly.
Prestressed Pipe Forming and Processing Equipment: The system can integrate with specialized equipment like pipe expanding machines, pipe bending machines, and pipe-making machines to facilitate the formation of prestressed pipes used in the structure.
Automatic Tensioning Pump Station: This provides the necessary power for the tensioning and pipe forming equipment, allowing for automated and precise operations.
Nuclear Power Plant Applications:
1. OVM’s nuclear containment PT system enhances structural integrity by preventing crack propagation and resisting extreme loads.
2. Nuclear prestressing requires high redundancy and strict quality control, which OVM ensures through its advanced equipment and testing procedures.
3. Compliance with international nuclear safety standards (e.g., IAEA, ASME, and fib) is a key advantage of OVM’s system
OVM cryogenic anchorage for LNG project
OVM’s cryogenic PT system is specifically designed for LNG (Liquefied Natural Gas) storage tanks, which operate at extreme low temperatures of -196°C. These systems ensure long-term stability, safety, and high performance in cryogenic environments.
Key Features:
1. PT system can be applied to -196℃ working environment, anchoring performance is stable, safe and reliable
2. Reduce the bending Angle of steel strand and reduce the local stress concentration
3. Provides related prestressed professional subcontracting technology services;
4. Provide technical support for field test project of LNG storage tank project
5. Typical holes: 12, 15, 19, 22, 27, 31
LNG Storage Tank Applications:
1. OVM’s cryogenic anchorage prevents prestress loss due to thermal contraction at extremely low temperatures.
2. The use of specialized materials ensures that the system remains flexible and durable under cryogenic conditions.
3. Reducing local stress concentrations extends the service life of LNG storage tanks, making OVM’s system ideal for long-term operation.
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