Pipe ramming is an alternative trenchless technology to install steel pipes underneath roads, highways, railways, hills and earth bund walls. This method is most suitable for relatively straight gradient pipelines.
The process involves the use of a pneumatic hammer that is attached to a pipe casing end. The leading end of the pipe casing is left open and fabricated with a casing shoe of a slightly bigger diameter than the casing to ensure an over-cut. The pneumatic hammer is powered by an air compressor that converts the air flow to a succession of percussive blows that drives the casing into the ground. As the pipe casing is driven into the ground, its internal annulus is filled with excavated material. The internal annulus of the pipe casing is constantly cleared and cleaned off from the excavated material as it advances along the intended crossing.
We have the capability and experience to install pipe casings by pipe ramming method for steel pipes ranging from 600mm to 1600mm in diameter.
We have the necessary expertise and experience to provide the solution and services for a wide range of pipe rehabilitation, as we understand that every underground structure deteriorates over time, therefore it is vital that diameter sizes and estimations of length are determined strategically to ensure the longest use of each pipeline.
Pipe roofing is essentially lined pipes, forming into a roof matching the shape of the tunnel that is formed earlier, by tunnel excavation, and by installation of steel pipes. We have done several pipe roofing projects, particularly in 2002 highway Jacking, and 2009 – NKVE Tunnel at Jalan Persiaran Tropicana. Mersing has the capability to do up to lengths of 100 meters, and at the diameters of 1,500mm – 2,000mm.
We have 30 years of experience in the guided Auger Boring method. It is one of the most reliable methods for short crossings, which is non steerable and it is an ideal method for straight and accurate drives in various ground conditions. Our capacity of drilling ranges from 60 meter – 80 meter maximum, 300mmØ.
During installation, the pipe fully supports the ground while the cut spoil is conveyed by continuous flight auger back to the work pit. A laser or theodolite guidance system steers the asymmetrical head through the hollow tubes.
Once the pilot tube reaches the exit shaft, an accurate line that has been established, either the upsizing or pipe pull can begin. Quite similar to pipe jacking, the Auger Boring machine is pushed from the launch shaft to the exit shaft.