Pipe Jacking – Micro Tunneling

Overview

Microtunnelling is a trenchless and remotely controlled pipe jacking method that eliminates the need for worker entry into shafts or tunnels. It combines excavation, pipe jacking, and spoil removal in a seamless, automated process.

Key Applications

• Remote-Controlled Operation: Managed from a control console above ground.
• Worker Safety: No worker entry is required inside shafts or tunnels.
  Simultaneous Processes: Excavation, spoil removal, and pipe jacking occur concurrently.
• Minimal Surface Disruption: Only drive and reception shafts require excavation, reducing the need for open trenches.

Microtunnelling Tunnel Boring Machines (MTBM)

1. Specialized Equipment

• Microtunnelling uses electrically powered MTBMs with cutting heads.
• The MTBM is attached to the pipe being advanced as the tunnel is bored.

2. Ground Condition Adaptability

• MTBMs are designed to operate in a variety of ground conditions, including gravel, sand, silt, and clay.
• The type of cutter head and spoil removal system is selected based on predicted ground conditions.

3. Accurate Excavation

• Laser-guidance systems and computerized monitors ensure precise alignment and evenly stressed pipelines.

Advantages of Microtunnelling

• Enhanced Accuracy: Pipelines installed using microtunnelling are more precise than those laid with open trench methods.
• Improved Safety: Minimizes risks to workers by reducing the need for onsite labor in confined spaces.
• Environmentally Friendly: Reduces surface disruption and eliminates extended open trenches.
• Versatile Application: Suitable for nearly all ground conditions with customizable equipment configurations.