Technological Innovation
Engineering Breakthroughs Driven by Technology
70+ technical patents, a fleet of 45 full-range RTBM machines — continuously advancing the frontier of rectangular pipe-jacking technology.
Intellectual Property
Core Technical Patents
Representative Patents (partial listing)
70+Total Patents
No.Patent TitleTypeStatus
1A Low-Resistance Extrusion Reaming Rectangular Pipe-Jacking Machine and Its Construction MethodInventionGranted
2A Composite Thick Slurry for Underground Engineering and Its Application MethodInventionGranted
3A Foundation Reinforcement Method for Rectangular Pipe-Jacking Construction in Soft GroundInventionGranted
4BIM-Based Intelligent Control System and Method for Rectangular Pipe-Jacking MachinesInventionGranted
5A System and Method for Precision Guidance in Tunnel EngineeringInventionGranted
6A Bedrock and Boulder Pre-Treatment Method for Large-Section Rectangular Pipe-JackingInventionGranted
7Array-Type Rectangular Tunnel Structure and Construction Method for Interconnected Underground SpacesInventionGranted
8A Retractable Rectangular Pipe-Jacking Machine and Its Construction MethodInventionGranted
9An Automatic Anti-Retreat Device for Rectangular Pipe-Jacking with Claw CuttersInventionGranted
10A Variable-Curvature Small-Diameter Curved Pipe-Roof Machine and Its Construction MethodInventionGranted
11Dual-Station Trolley for Small-Diameter Curved Pipe-Roof Machine Construction and Its ApplicationInventionGranted
12A Long-Distance Rock Pipe-Jacking Tool Head and Its Application and Construction MethodInventionGranted
13A Horizontal Full-Rotation Casing Boring Equipment and Construction MethodInventionGranted
14A Circumferential Multi-Cutter-Head Vertical Shield Boring Machine and Its Construction MethodInventionGranted
15A Multi-Cutter-Head Planetary Vertical Shield Machine and Its Construction MethodInventionGranted
… Total patents filed: 70+ (partial listing shown above)
Equipment Fleet
RTBM Equipment Specifications
Equipment Specifications
A full-range fleet of rectangular pipe-jacking machines, meeting the demands of underground construction across multiple sectors.
Total Fleet
45 units
Max Cross-section
13.04×9.61m
Size Variants
24 variants
Most-Deployed Size
3.3×4.4m (×8)
Extra-Large Section (>10m)
Extra-Large Section
13.04 × 9.61 m1 unit
10.4 × 7.5 m1 unit
10.2 × 6.6 m3 units
10.2 × 2.7 m1 unit
Large Section (7m – 10m)
Large Section
9.8 × 5.9 m1 unit
9.4 × 4.38 m1 unit
9.1 × 5.5 m1 unit
9.1 × 4.6 m1 unit
9.1 × 4.4 m1 unit
8.4 × 4.4 m1 unit
8.1 × 4.9 m1 unit
7.7 × 5.1 m2 units
7.7 × 4.5 m1 unit
7.7(7.5) × 4.3 m2 units
7.1 × 4.7 m1 unit
7.0 × 5.0 m4 units
Medium & Small Section (<7m)
Medium & Small Section
6.9 × 4.9 m2 units
6.9 × 4.2 m3 units
6.9 × 3.9 m1 unit
6.0 × 4.0 m1 unit
5.45 × 4.5 m1 unit
3.8 × 3.2 m1 unit
3.5 × 3.7 m1 unit
3.3 × 4.4 m8 units (most-deployed)