Microtunneling

• Remotely controlled  tunneling machines, driven from a drive shaft to a receiving shaft by means of an hydraulic jacking station.
• The TBM equipment is electric hydraulic powered.
• The micro tunneling machine is launched from a pit through an entrance which isolates the ground from the pit.
• Excavated soil is carried as a slurry mixture to the surface.
• Ground pressures are equalized with slurry and jacking pressure.
• As the machine moves forward, jacking pipes are added on to the back of the machine,.
• Steering and guidance is accomplished by means of a laser & hydraulic steering jacks inside the tunneling machine.
• Can be used to achieve the required gradient in different ground formations within the water table with up to 3.0Bar of face pressure .Allows for deep pipeline installation.
• Equipment Available:  Micro-tunneling – 3 No.
• Pipe Sizes: from 1000 mm ID, to 2800 mm ID.
• Boring Length: 20 meter up to 700+ meter.
• Ground Conditions:  Soft, Medium & Rock Ground Conditions.