Key Technical Specifications

• Geology: Rock and semi-consolidated formations
• Operating Range: Soft or brittle rock up to the hardest rock (> 250 MPa)

• Diameter Range:

  • Segmental lining: 2.8 m – 14 m
  • Pipe jacking: ≥ 1.54 m
• Support Type: Segmental lining or pipe jacking
• Drive Mode: Hydraulic thrust system with shielded housing

Main Advantages

• High advance rates in all types of consolidated rock
• Superior tunnelling safety even in brittle or fractured zones
• Compatible with partially water-bearing geology through soil conditioning
• Efficient tool replacement without entering unprotected areas
• Precise machine steering for curved alignments and complex tunnel geometries
• Integrated vibration control through hydraulic stabilizers

How It Works

The Single Shield TBM operates by pressing a disc-cutter-equipped rotating cutterhead against the tunnel face. Under immense contact force, the disc cutters chip away the rock mass, breaking it into manageable fragments.

• Rock Cutting: Disc cutters fracture the rock face under pressure exceeding 250 MPa.
• Material Removal: Buckets and chutes guide cuttings to the central muck ring, where gravity feeds them onto a conveyor system.
• Dust Control & Cooling: High-pressure water jets suppress dust and cool cutting tools.
• Material Transport: Muck is transferred via belts or haulage vehicles out of the tunnel for disposal.

This continuous cycle enables steady advance rates and efficient muck removal with minimal downtime.

Safety and Maintenance Features

• Rear-access cutter change: Disc cutters can be replaced safely from behind the cutterhead structure — no exposure to the unsupported tunnel face.
• Vibration reduction: Hydraulic stabilizers maintain smooth operation and protect components.
• Overcut design: The boring diameter exceeds the shield diameter to prevent jamming and enable flexible steering.

Precision Steering and Control

The machine incorporates fixed or displaceable drives equipped with steering cylinders, torque box systems, or longitudinal displacement cylinders, allowing operators to achieve tight curve radii and precise alignment adjustments.
The upward offset cutterhead axis further enhances guidance and prevents shield binding in uneven rock.
Overcut rollers and optional overcut housings can expand the boring diameter for custom lining requirements, while bi-directional cutterhead rotation in pipe-jacking configurations helps counteract torsional rolling.

Digital Connectivity

With HERRENKNECHT.CONNECTED, operators can access:

• Real-time performance data
• Predictive maintenance insights
• System diagnostics and operational analytics

This digital integration ensures maximum uptime, data-driven decision-making, and remote monitoring for tunnelling projects worldwide.

Applications

• Hard-rock metro and railway tunnels
• Water transfer and utility tunnels
• Road and highway tunnel construction
• Mining and hydroelectric infrastructure
• Pipe-jacking drives in solid geology

Summary

The Herrenknecht Single Shield TBM combines power, precision, and protection — achieving fast tunnelling rates and stable operation in some of the toughest geological conditions. Its ability to handle variable rock strengths, maintain consistent progress, and protect personnel makes it a trusted choice for modern underground construction projects around the globe.

Key Technical Capabilities

• Applicable Geology: Soft, mixed, and rocky ground
  
• Tunnel Diameter Range: Up to 4.8m (OD), from DN250 in pipe jacking to DN3200 in segmental lining
  
• Drive Length: Over 1,000 meters possible with intermediate jacking stations
  

Why Choose the AVN Machine

• Operates effectively in nearly any ground condition
  
• Handles high water pressure environments with ease
  
• Hydraulic face support ensures superior tunnelling safety
  
• Precision control in both horizontal and vertical alignments
  
• Perfect for non-accessible tunnelling areas
  
• Flexible excavation diameters achievable with modular extension kits
  

Innovative Technology

AVN (Automated Tunnelling Machine Wet) models utilize a slurry pressure balance system, ensuring stable excavation faces even under challenging conditions. The integrated cone crusher and customizable cutting wheel designs enable efficient material handling and optimized excavation rates.

Tailored Cutterheads for Every Terrain

• Soft Soils & Mixed Ground: Equipped with standard or mixed cutterheads for balanced cutting performance
  
• Hard Rock: Outfitted with disc cutters for powerful rock penetration
  
• Dynamic Sprinkler Systems: Prevent clogging in cohesive soils through high- and medium-pressure cleaning jets
  

Performance Enhancements

• Digital Connectivity: Herrenknecht.CONNECTED provides real-time data monitoring and remote diagnostics
  
• Camera-Assisted Monitoring: Optional built-in cameras enhance visibility and wear tracking (available from AVN 1200 models)
  
• Optimized Lubrication System: Automated bentonite injection minimizes pipe friction and boosts jacking distance
  

Applications

Ideal for:

• Urban microtunnelling
  
• Pipeline installation beneath infrastructure
  
• Long-distance pipe jacking
  
• Non-accessible segmental lining projects
  

The Herrenknecht AVN Tunnelling Machine combines proven reliability with smart digital integration, redefining how engineers approach underground construction in complex geologies.

Key Features

Compact Design for Maximum Space Utilization
Built specifically for high-density storage facilities, the VDSE Sit Type VNA Forklift allows operators to work efficiently in aisles as narrow as 1.8 meters. Its compact body and precision steering system optimize turning radius and enable safe, fast pallet handling at high lift heights.

High Lifting Performance
The robust mast system supports lift heights of up to 9–12 meters (depending on configuration) with smooth, stable operation. Advanced hydraulic control provides consistent lifting and lowering speeds even under full load, ensuring safety and stability at every level.

Operator Comfort and Visibility
The spacious sit-down operator compartment features an adjustable seat, intuitive control layout, and clear forward and upward visibility. Ergonomic controls reduce fatigue during long shifts, while a panoramic overhead guard enhances safety during stacking operations.

Electric Power System
Powered by an energy-efficient AC electric drive system, the VDSE delivers long operating hours with minimal maintenance. Regenerative braking and intelligent battery management optimize energy use and extend battery life, supporting sustainable warehouse operations.

Precision Steering and Stability
Equipped with advanced electronic steering control, the forklift provides smooth directional changes and precise positioning. Dual drive motors and anti-roll stability systems enhance safety, even during high stacking or uneven flooring conditions.
 
Integrated Safety Systems
Safety features include an automatic speed reduction function during cornering, electronic braking, overload protection, and emergency stop system. Optional sensors and cameras further enhance operational control and accident prevention.

Applications

• High-density warehousing
• Narrow-aisle storage facilities
• Cold storage and logistics centers
• Distribution hubs and retail inventory zones
• Manufacturing and assembly lines

Summary

 
The VDSE 1.6 Ton Sit Type VNA Forklift delivers exceptional performance in narrow-aisle environments, combining advanced electric technology with operator-focused design and precision engineering. With its smooth control, efficient power system, and high-lift capability, it offers a superior balance of productivity, safety, and operational economy for modern warehouse logistics.