Description
The Pipe Roofing Machine is an innovative trenchless construction technology designed to support soil on the periphery of tunnel faces by constructing pipe roofs. This state-of-the-art machine ensures safe excavation, especially in challenging environments like those intersecting existing highways or railways. Utilizing a pipe jacking technique, steel tubes are inserted into the ground, forming a protective structure that allows for secure tunneling operations.
Working Principles: The machine operates by jacking steel tubes into the soil from a launching shaft to a reception shaft. These tubes interconnect through lock mouths, creating a complete tube system. Waterproofing additives are then injected into the gaps to prevent water ingress, allowing for safe tunnel excavation under the protection of the pipe roofs.
Specifications
| Attribute | Details |
|---|---|
| Project | Chongqing Railway East Loop Project |
| Machine Type | Pipe roofing machine with slurry support |
| Geology | Artificial fill, clay, mudstone, sandstone |
| Machine Data | 3 * pipe roofing machines |
| Excavation Diameter | 720 mm |
| Length of Shield + Back-up | 12 m |
| Weight | 63 t |
| Installed Power | 93 kW |
| Nominal Torque | 25 kNm |
| Maximum Thrust | 4000 kN |
| Performance | Average daily advance rate: 15 m Maximum daily advance rate: 18 m |
Additional Information
Features of CRCHI’s Pipe Roofing Machine:
- Composite cutterhead capable of handling various complex geologies.
- Pull-out functionality allows for multiple uses and access to address obstacles.
- Slurry balance method for precise control of tunnel face pressure and reduced ground settlement.
- Automatic measurement system for accurate posture feedback.
- Articulation device for precise deviation correction and direction adjustment.
