Trenchless Technology

Trenchless Technology

Great Tunnel Sdn Bhd had been established by the group for managing the trenchless works in year 2012.
We acquired this technology from Germany which significantly boosting Malaysia’s sewerage construction field especially in the sewerage projects under The Greater KL/KV and Malaysia’s ETP.

ESTABLISH OF GREAT TUNNEL SDN BHD

Great Tunnel Sdn Bhd was established in early 2013, with visionary to participate and support the Malaysia Nation’s plan - The Greater Kuala Lumpur & Klang Valley National Key Economic Area (Greater KL/KVNKEA) which aimed to transform Malaysia’s capital and economy into a world-class metropolis in term of economic developed and liveability country by year 2020.

We foresight there is high demand of efficient trenchless technology to cope and support the Nation Plan (Greater KL/KVNKEA) which commenced in year 2012, however the market is lack of sufficient supply. With the entrepreneurial and innovative mind-set, we acquire numbers of micro tunnelling machine from Germany in year 2013, which started our foray into the trenchless technology. Today we are successfully expanding our fleet and acquired total eleven (11) micro tunnelling machines within one and a half (1.5) years, with total net worth of more than RM43million.

With our resourceful and versatile machines together with endless support from the established German Trenchless Specialist, which offer the technology transfer as well as regular onsite training by fulltime experienced German Specialist in Malaysia to enable the spot-on trouble shooting can be carried out jointly with our team that render our achievement of jacking rate of more than 13 kilometres of pipe length with ranged from 225mm diameter to 1050mm diameter in one year time. We believe we are capable to achieve the next level of success and breaking new milestone in line with our target in the coming year with our great collaboration with the German Trenchless Specialist. Our current and latest fleet of machines can cater for pipe ranged from 225mm dia to 2400mm dia.

We are proud to be part of participant in the Greater KL/KVNKEA projects driving towards the developed nation which make a better life and environment, not even to our nation but to showcase to the World.

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Pipe Jacking is a technique for installing underground pipelines using Powerful hydraulic jacks to push the specially designed pipes through the ground behind a thrust shield at the same time excavation is taking place with the aid of Micro Tunnel Boring Machine . Micro-tunnelling by pipe-jacking is a process that uses a remotely controlled micro-tunnelling boring machine combined with pipe jacking technique to directly install pipelines underground in a single pass.The process is an idea solution where traditional open cut methods cannot be implemented due to site constraint and any other surface physical discouragement. Micro-tunnelling is a process where the workforce does not routinely work in the tunnel and is accurate to tolerances of one inch which is crucial when working around buries utilities. The boring machines can be operated and launched from either shafts or cofferdams and can tunnel through a variety of ground condition.

Great Team Great Work


TRENCHLESS METHOD

PIPE JACKING is a technique for installing underground pipelines using Powerful hydraulic jacks to push the specially designed pipes through the ground behind a thrust shield at the same time excavation is taking place with the aid of Micro Tunnel Boring Machine

The common method of trenchless work that used by Great Tunnel Sdn Bhd is :

SLURRY SYSTEM

slurry-systemA slurry conveyance system is suitable and recommended for longer distances and larger diameters. In the Cutter Head, the excavated spoil is mixed with water to form a lubricant medium then transport to the surface via dedicated pipes and hoses. At this juncture, water and spoil could get separated when it passed through the slurry treatment and the water will maintain in the slurry circle and the spoil would discharge separately.

 

AUGER SYSTEM

auger systemFirst a pilot pipe is jacked through the soil to the reception pit. Direction and slope are monitored continuously during the jacking. After completing the steered boring there are diverse process alternatives for the expansion drilling, depending on the diameter. The common last step of all processes is the jacking of the product pipes.