LANDFILLS INSULATION BY HDD

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Client: MC Scarl – Cooperativa MUCAFER Scpa – Italy

Year: 2010

What I did: I worked for the main contractor MC Scarl – Cooperativa MUCAFER Scpa, as the specialized advisor for the HDD operations in the insulation of two urban landfills, for the environmental securing of the area. In less than one year approximately 60 km (37 miles) – corresponding to more than 500 horizontal directional boreholes – were drilled through soft to hard limestone rock in order to carry out underground injections to create a bottom screen below the garbage level  (total value of the HDD installations: €14M). This was the biggest project of ever for a landfill insulation made by HDD. The specialized subcontractor for HDD and soil treatments was TREVI Spa.

LANDFILLS INSULATION BY HDD
Plan view of the CONTE DI TROIA landfill - more than 200 directional boreholes were drilled to construct the underground screen.
Plan view of the PARITI landfill - more than 300 directional boreholes were drilled to construct the underground screen.
Example of the longitudinal section of a directional borehole.
Example of the longitudinal section of a directional borehole.
General scheme of the boreholes geometry.
General scheme of the injection operation.
Example of a survey soil core.
Screenshot of the CCTV inspection of two survey boreholes.
A conventional drill rig equipped with a directional dow-the-hole assembly.
A rig during the directional drilling operation.
A mud motor ready to start a pilot bore
Multiple teams were performing directional drilling at the same time.

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