Applications and characteristics of PC Strand products in Yarlung Zangbo River Hydropower Station!
The Lower Reaches Hydropower Project in Yarlung Zangbo River commenced construction on July 19,2025. As a super project of unprecedented scale globally (with a total investment of approximately 1.2 trillion yuan and an installed capacity of 60 GW) with extreme demands on building materials under complex plateau geological conditions.
PC Strands, renowned for its high strength, corrosion resistance, and fatigue resistance, is widely applied in core engineering components to meet seismic resistance, compressive load-bearing capacity, and long-term stability requirements.
1.The following details its application scenarios, technical specifications, and product types:
1) Application Scenarios & Functions Tunnel Support and Reinforcement: The project requires the excavation of a 50-kilometer-long ultra-long water diversion tunnel, traversing 17 geological fault zones and a 9-magnitude strong earthquake zone.
2) Prestressed steel strands serve as the "invisible skeleton" of the support system, reinforcing tunnel walls to prevent rock bursts and collapse risks.
3) Dam Anchoring and Structural Integrity: In the "flexible dam body" design (resistant to 8.5-magnitude earthquakes), steel strands anchor critical dam sections to enhance overall seismic performance.
4) Water Pipeline Reinforcement (PCCP Pipe Application): The water diversion pipeline must withstand extreme pressures up to 235 atmospheres. Embedded in PCCP pipes (pre-stressed steel cylinder concrete pipes), these cables provide high-strength support to ensure sealing integrity and durability under high-pressure conditions.
5) New Energy Infrastructure Anchoring: Steel strands anchor offshore wind power foundations and other structures in the supporting water supply system and hydropower facilities, improving overall stability. Product Types and Technical Features
2.Ultra-High-Strength Steel Strand:
Featuring 2200-2400MPa strength specifications (over 40% higher than conventional products), this material demonstrates exceptional tensile strength and fatigue resistance, capable of withstanding high-stress geological environments and millions of cycle loads. For instance, non-bonded galvanized steel strands have been deployed in water resource allocation projects like the Pearl River Delta, where their corrosion resistance is enhanced through double-layer anti-corrosion structures (such as galvanizing), ensuring over 50-year service life while adapting to high-altitude UV exposure and extreme temperature variations.
3.PCW:
Specifically designed for water pipelines, this steel wire is embedded within concrete cylinder pipes to provide core compression support. As an industry standard developer, its products can withstand 235 atmospheres of pressure and have passed salt spray tests verifying corrosion resistance. Intelligent Monitoring Integration: Some steel strands incorporate fiber Bragg grating sensors enabling real-time stress monitoring (accuracy exceeding 90%), effectively predicting rock bursts and structural deformations.
4.Technical Challenges and Engineering Requirements Extreme Environment Adaptability:
1)Products must meet reliability requirements in high-altitude environments (above 2000 meters), strong seismic zones, and high-pressure conditions. Safety assurance includes earthquake-resistant designs (e.g., resisting 9-degree earthquakes) and corrosion-resistant reinforcement (dual-layer structure).
2)Large-Scale Demand: Project scale equivalent to three times that of the Three Gorges Project, with estimated steel strand consumption exceeding 100,000 tons, driving industrial chain development toward high-value-added products like 2400MPa-grade steel strands.
3)Material Innovation: Applications of nickel-based superalloys and high-strength steel strands (e.g., 2400MPa grade) accelerate the industrialization of specialty materials, enhancing overall engineering efficiency.
5.Information of the Lower Yarlung Tsangpo River Hydropower Project
1) Project Scale and Investment Installed Capacity: The planned installed capacity ranges from 60 to 81 million kilowatts (some sources indicate 70 million), equivalent to three Three Gorges Dams (Three Gorges with 22.5 million kW).
2) Annual Power Generation: Approximately 300 billion kWh, sufficient to meet the electricity needs of 300 million households (based on an average annual consumption of 1,000 kWh per household).
3) Total Investment: About 1.2 trillion yuan, over three times the investment in the Three Gorges Project.
4) Layout and Technical Features Cascade Development: Utilizes straight-through tunnel diversion for water diversion, constructing five cascade power stations concentrated along the Motuo County section of the Lower Yarlung Tsangpo River.
5) Natural Advantages: A natural drop of 2,000-2,700 meters (equivalent to a 660-story building) within a 50-kilometer river channel, with highly concentrated hydropower resources. Narrow canyon terrain and sparse population reduce resettlement pressure. Innovative Structure: Plans to build the world's tallest concrete dam, requiring approximately 1.5 billion tons of sand and gravel aggregates (three times that of the Three Gorges Project).
6) Strategic and Economic Significance Energy Transition: Replacing 90 million tons of coal consumption, increasing clean energy share to 8-10%, supporting "dual carbon" goals.
7) Project Scale: Total investment about 1.2 trillion yuan, with 60 million kW installed capacity (three times the Three Gorges Project), planning five cascade stations.
8) Functional Positioning: Primarily for power transmission and consumption, while meeting local energy demands in Tibet.
Our products are used in
wind power projects, nuclear power construction, supply of flexible bracket components for offshore/land photovoltaic systems, supply and maintenance of wind turbine tower anchor cable accessories, as well as supply and maintenance of LNG storage tank anchor cables and mining applications.
Specifications: 7.94-9.5-10.8-12.5-12.7-12.9-15.2(1860/1960)-15.7-17.8-18.9-21.6(1770/1860)-21.8-28.6; Strength: 1570MPa to 2230MPa or higher.
24-hour service hotline: 8613622011252