TBM Tunneling Services
Advanced tunnel boring machine operations for railway, road, and utility tunnels — delivering precision, safety, and speed in Hong Kong's most demanding underground projects
30+
Years TBM Experience
50km+
Tunnel Driven
15+
TBM Projects
0
Lost-Time Incidents
Hong Kong's TBM Tunneling Specialists
Perfect Engineers Limited has been at the forefront of mechanised tunnelling in Hong Kong for over three decades. Our TBM division operates Earth Pressure Balance, Slurry Shield, and Hard Rock machines across diameters from 3m to 12m, serving MTR extensions, strategic sewage schemes, water supply tunnels, and road links.
We manage the complete tunnelling cycle — shaft construction, TBM assembly and commissioning, the drive itself, segment lining installation, and final breakthrough — with a single integrated team. Our in-house navigation engineers, geotechnical specialists, and maintenance crews ensure continuous advance rates while protecting surface structures and utilities above.
30+ Years
TBM Experience
50km+
Tunnel Driven
Our Capabilities
End-to-end TBM tunnelling services from machine selection and shaft design through to final lining and handover
TBM Operations
Full-cycle TBM operations from machine assembly and launch to breakthrough, including segment erection and tail void grouting.
Precision Guidance
Laser-guided and automated total station navigation systems ensuring millimetre-accurate tunnel alignment throughout the drive.
Segment Lining
Design, manufacture, and installation of precast concrete segmental lining rings for permanent tunnel support.
Ground Support
Comprehensive ground treatment including pre-excavation grouting, face stabilisation, and annular grouting behind the shield.
Monitoring & Control
Real-time monitoring of face pressure, ground settlement, and structural performance with automated alert systems.
Maintenance & Repair
In-tunnel cutter inspection and replacement, shield maintenance, and emergency intervention under compressed air if required.
Technical Specifications
Industry-leading standards and performance parameters for all TBM tunnelling operations
TBM Diameter Range
3.0m to 12.0m diameter machines for utility, road, and railway tunnels
Machine Types
Earth Pressure Balance (EPB), Slurry Shield, and Hard Rock TBMs
Drive Length
Single drives up to 3,000m; multi-drive projects with intermediate shafts
Advance Rates
Up to 25m/day in favourable ground; average 10–15m/day in mixed ground
Segment Lining
Precast C50/60 concrete segments, 200–400mm thick, universal ring design
Navigation System
Automated Total Station (ATS) guidance with ±5mm positional accuracy
Settlement Control
Surface settlement limited to <10mm with real-time monitoring arrays
Certifications
MTRCL approved contractor; compliant with GEO, BD, and CEDD requirements
Our TBM Process
A structured, proven methodology from project mobilisation to final handover
Design & Mobilisation
Geotechnical review, TBM selection, shaft design, and site establishment.
Assembly & Launch
Machine assembly in launch shaft, commissioning, and controlled initial drive.
Tunnelling Drive
Continuous advance with real-time monitoring, segment installation, and grouting.
Breakthrough & Handover
Controlled breakthrough, machine disassembly, final lining inspection, and handover.
Featured Projects
Landmark TBM tunnelling projects demonstrating our technical excellence and safety record
Cross-Harbour Rail Tunnel
Twin 8.5m diameter EPB TBM drives totalling 4.2km beneath Victoria Harbour for a new MTR line extension.
Strategic Sewage Tunnel
3.5m diameter slurry TBM drive of 2.8km for the Drainage Services Department deep sewage collection system.
Airport Express Link
6.2m diameter hard rock TBM through granite formations for a 1.6km airport connectivity tunnel with zero surface incidents.
Planning a Tunnelling Project?
Contact our TBM specialists today to discuss your underground requirements. We provide feasibility studies, method statements, and competitive tenders for projects of all scales.