The Dai Ninh Hydropower Plant in Vietnam is a significant project in the field of hydroelectric energy. The tunnel lining of the Dai Ninh Hydropower Plant is an essential component of this infrastructure.
The Dai Ninh Hydropower Project was constructed to harness the power of the Dong Nai River to generate electricity, serving the needs of the people and supporting the country’s industrialization and modernization efforts.
| Overview | |
| Project | Dai Ninh Hydropower Plant – Lam Dong |
| Contractor | Kajima – Kumagai – Song Da Joint Venture |
| Concrete supplier | P.S. Mitsubishi Construction Co., Ltd. (Japan) |
| Project duration | 2003 - 2008 |
| Construction location | Lam Dong Province – Binh Thuan Province |
| Product used | Mighty 150 |
PROJECT OVERVIEW
Overview of Tunnel Lining Concrete:
Tunnel lining concrete is a specialized type of concrete used in the construction of tunnels and other underground structures such as railway tunnels, road tunnels, water conduits, or underground facilities in infrastructure projects. This is a critical application of concrete, offering several benefits, including durability and water resistance. Below are key aspects of tunnel lining concrete:
1. Durability:
Concrete is a high-strength material capable of withstanding significant pressure and loads. This is essential in the construction of tunnels and underground structures where long-term stability is crucial for safety.
2. Waterproofing Capability:
When properly designed and applied, concrete offers good water resistance. In some cases, additional waterproof membranes or external sealing systems may be required to enhance water-tightness.
3. Hydrostatic Pressure Resistance:
For tunnels located below the water table, the tunnel lining concrete must be engineered to resist external water pressure. This often involves the design of water-pressure-resistant ribs, dewatering systems, and other supplemental safety measures.
4. Periodic Maintenance and Inspection:
Tunnels and underground structures require regular inspections and maintenance to ensure structural integrity and safety. Any cracks or damage in the concrete must be promptly repaired.
The construction of tunnel lining concrete demands special attention to engineering techniques and execution processes, including material selection, technical design, and meticulous project management to ensure tunnel safety and durability.
Technical Specifications:
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The length of the Dai Ninh Hydropower Project tunnel is 10 km.
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The design compressive strength is 45 MPa at 28 days.
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The concrete must be dense and durable. Japanese engineers not only conducted compressive tests but also sliced the specimens for microscopic inspection to evaluate density—considered a critical factor in addition to meeting strength requirements to ensure overall safety.
Supply Capability:
The products supplied by ICCI fully met all technical requirements and demonstrated strong supply capacity.
As a result, the client highly appreciated ICCI’s professionalism, service attitude, and 24/7 supply readiness, which ensured project continuity without delays.
Contractor’s Evaluation:
The contractor expressed high satisfaction with the quality of the product, the supply service, and ICCI’s ongoing support throughout the supply process.
KAJIMA committed to supporting ICCI in future projects and scheduled a follow-up meeting at ICCI’s Ho Chi Minh City office upon project completion.
