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Brief
History
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In
the mid 1980’s a funded program was set up to find a new method
for the replacement of underground cable and piping without the need
for surface trenching, and it was found that with modification the
same method that has been used in the oil fields for vertical
directional drilling could be used for Horizontal Directional
Drilling (HDD) which has resulted in the technology of today.
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Horizontal
Directional Drilling.
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Unlike
open-trench construction, Horizontal
Directional Drilling requires only single entry and exit points
It
has become one of the major systems in use for trenchless
installations for underground power and communication cables,
gas,sewerage and water mains.
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Advantages
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Surface
obstructions such as highways and landscaping are not damaged and
the underground infrastructure is not disturbed when installing pipe
or cable.
Effective for installations beneath busy streets and footpaths in congested areas where minimal interruptions to vehicle and pedestrian traffic is essential. Can be used in hard rock.
Environmental
friendly
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