YOUR FULL SERVICE PROVIDER IN MICROTUNNELING SOLUTIONS
MICROTUNNELING & PIPEJACKING SERVICES
we provide full service and preferred partner for microtunneling and pipe jacking in the Trenchless Technology Industry. We supply new and revised microtunneling machines and provide customized solutions tailored to contractors requirements all around the world.
We have successfully provided our crew services in India, Egypt, Bangladesh, UAE, Malaysia, China, Thailand, and Sri Lanka.
16 YEARS
TRENCHLESS TECHNOLOGY
With more than 16 years of experience in Horizontal Directional Drilling, Tunneling & Pipe Jacking Services for telecommunication, power cables, gas pipe works, sewerage lines for construction industries in India, Malaysia, China & Thailand.
in trenchless technology
We pledged to deliver superior quality and customer satisfaction for trenchless technology works “on-cost” and “on-time”
we guaranty fast delivery and attractive prices. Discover our offer of new and used equipment and machines for sale and for rent.
To provide our employees with an honest, helpful and safe working environment, where every employee (individually and collectively) can dedicate himself/herself to providing our customers the highest levels of quality construction services at competitive prices.
To provide an effective and innovative approach to timely delivery of projects of our clients, in turn helping them provide the best possible service.
To become partners in progress with our clients.
To maintain the highest levels of professionalism, integrity, honesty and fairness in our relationship with our clients, vendors, sub-contractors and customers.
we are working for 500mm to 6500mm diameter
Microtunneling or microtunnelling is a tunnel construction technique used to construct utility tunnels from approximately 500mm to 3000mm in diameter. Because of their small diameter, it is not possible to have an operator driving the tunneling machine, so they have to be remotely operated.
Micro tunnel boring
Micro tunnel boring machines (MTBM) are similar to larger tunnel boring machines(TBMs). The MTBM and jacking frame are set up in a shaft at the required depth. The operator monitors the MTBM’s location, orientation and hydraulic devices via a computer console, a CCTV camera or Gyro unit. Some systems use video cameras in the jacking shaft and at the separation plant. Gyro Control have generally replaced cameras for location and digital feedback.
Operation
In most microtunneling operations the machine is launched through an entry eye and pipes are pushed behind the machine. This pipe jacking process is repeated until the MTBM reaches the reception shaft at the far end. The speed of the advancing machine is limited to the speed at which the pipe is inserted into the entry eye via the hydraulic rams in the jacking frame.
The friction of the ground around the pipe increases in proportion to the tunnel length. Two practices can minimize this friction. First, over-cutting is used to provide a gap between the inner edge of the tunnel and the outer edge of the liner. The gap is 1⁄2 to 1.5 inches (13 to 38 mm). A lubricant, often bentonite slurry, is injected into this gap. The pressure of the lubricant prevents the gap from collapsing. Depending on the geology a 35mm overcut may create ground subsidence. For road and rail crossings, this 35mm is reduced to prevent more than 10mm subsidence.
As much as hundreds of tons of force may be required to push the machine and liner forward. The jacking frame containing hydraulic rams produces these forces. The entrance shaft must be strong enough to support the forces it generates.
Interjack
In addition to the jacking frame, smaller jacks, called “interjacks”, may be inserted between sections of tunnel liner. These push two liner sections apart. Friction on the liner sections between the interjack and the tunnel entrance helps to prevent the liner from sliding out backwards. So while the liner behind the inter-jack does not move, those sections in front of it receive additional pushing force.