Double shield TBM
Inquire NowDescription
CRCHI’s Double Shield Tunnel Boring Machines (TBMs) are engineered for rapid and secure tunneling in both stable and unstable rock formations. These innovative machines combine the capabilities of open-type gripper TBMs and single shield TBMs, allowing for simultaneous segment installation and excavation in stable geological conditions. This dual functionality results in significantly faster tunneling speeds, making them ideal for constructing long tunnels in hard rock scenarios.
The Double Shield TBM features a sophisticated design comprising three main components: a front shield with a cutterhead, a telescopic shield, and a gripper shield equipped with gripper shoes and auxiliary thrust cylinders. The cutterhead, fitted with optimally arranged disc cutters, efficiently breaks rock at the tunnel face, while the machine’s gripper shoes extend to press against the tunnel sidewalls during excavation. In challenging geological zones, the telescopic shield retracts to merge with the front shield, allowing the TBM to advance using auxiliary thrust cylinders against the segment ring.
Specifications
| No. | Project Name | Excavation Diameter (mm) | Quantity |
|---|---|---|---|
| 1 | Lanzhou Water Diversion Project | 5,490 | 1 |
| 2 | Southwestern China Water Diversion Project | 5,560 | 2 |
| 3 | Middle East Water Diversion Project | 5,270 | 1 |
| 4 | Qingdao Metro Project | 6,300 | 3 |
| 5 | Shenzhen Metro Line 8 Project | 6,470 | 3 |
| 6 | Gansu Urban and Rural Water Supply Tunnel Project | 4,030 | 2 |
| 7 | Water Diversion Tunnel in Kaliwa Dam Project, Philippines | 4,800 | 1 |
Additional Information
CRCHI’s Double Shield TBMs are equipped with a reliable advanced drilling system that gathers geological information ahead, aiding in the creation of accurate geological maps. The cutterhead is constructed from highly wear-resistant materials, ensuring longevity and minimal downtime. The main drive utilizes high-quality double row cylindrical roller thrust bearings for enhanced safety and durability. A PLC control system allows for real-time monitoring and efficient data collection, while an innovative transport system enhances material handling within the tunnel.
Project Pictures
CRCHI’s double shield TBM with a diameter of 5,490mm for the construction of Lanzhou water diversion tunnel.
Breakthrough of Lanzhou water diversion tunnel using CRCHI’s double shield TBM.
FAT ceremony of a CRCHI double shield TBM for Qingdao Metro project.
FAT ceremony of a CRCHI double shield TBM for Shenzhen Metro Line 8 project.
Breakthrough of Shenzhen Metro Line 8 tunnel by using CRCHI’s double shield TBM.
