Description

CRCHI’s Single Shield Tunnel Boring Machine (TBM) is engineered to facilitate rapid and secure tunneling in challenging geological conditions, characterized by uneven strata, fracture zones, and low groundwater levels. This advanced machinery utilizes a rotating cutterhead with disc cutters to effectively excavate rock, making it particularly suitable for scenarios where traditional support structures are inadequate. The innovative segmental lining method provides robust rock support, while the alternating processes of segment installation and excavation ensure efficiency and safety throughout operations.

Features of CRCHI’s Single Shield TBM

• The cutterhead is constructed from a durable composite chromium-carbide wear-resistant plate, featuring carbide cutter bits for enhanced longevity.
• Equipped with a double row cylindrical roller thrust bearing in the main drive, ensuring extended service life and operational safety.
• A state-of-the-art PLC control system offers real-time monitoring and data collection for improved operational efficiency.
• Innovative transport systems facilitate the safe and efficient movement of segments, pea gravels, and construction materials within the tunnel.
• Water spray jets, a dust removal system, and an air cooling system work together to minimize dust and enhance the working environment.
• Advanced drilling and grouting systems provide necessary rock reinforcement when dealing with unstable formations.
• Available in diameters ranging from 3m to 15m, catering to diverse tunneling requirements.

Case Study

CRCHI supplied a Single Shield TBM with a diameter of 6,880mm for the construction of the Chongqing metro tunnel in China, marking the first use of this technology in urban metro projects. This TBM, equipped with a powerful drive system and an adaptable cutterhead, successfully navigated through a 3.84km section primarily composed of sandy mudstone, sandstone, and argillaceous siltstone. The project achieved remarkable tunneling rates, with a maximum daily advance of 30m and a monthly advance of 546m, culminating in a successful breakthrough in November 2016.

Specifications

Additional Information

For optimal performance, regular maintenance and monitoring of the TBM’s systems are recommended. Ensure that the machine is operated within the specified geological conditions to maximize efficiency and safety.