27-06-2014, 02:25 PM
TRENCHLESS TECHNOLOGY
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INTRODUCTION
Trenchless technology is basically making a tunnel below the surface and installing service lines like water or gas pipes, electric or telecommunication cables etc. with out any disruption to the public.
It also makes it possible to install the utilities under rivers canals and other obstacles with no disruption of flow and with minimum or no damage to the environment.
Need for trench less technology
The disadvantages and difficulties encountered in conventional trenching methods have resulted in thinking of the need for trenchless technology.
The advantages of the no-dig technology are also responsible for the need of this technology to be adopted in mainly urban areas
GUDIED DRILLING
Guide drilling employs an excavation or soil displacement with compact lightweight rig for rapid mobilization.
The drilling head is launched from the surface at an inclined angle.
RELINING THE EXISTING PIPES
A flexible liner is places into the defective pipe and with the use of water under pressure finds its own way and can pass bends of 90o .
When the liner is in place, it is heat cured to
create a rigid, tough, and smooth inner surface.
LOCALISED REPAIR
Pipe slip lining is another method used that involves inserting new smaller pipes in to older, damaged sewers thereby replacing the old pipe.
Modified pipe slip lining is the modification under the pipe slip lining which is more advantageous .
CONCLUSION
By adopting this technology we can successfully implement pipes under the surface with out making any disruptions to the environment and public.
This enables us to retain our available resources. There by keeping the earth unexcavated