Archivi tag: microtunneling

INSTALLATION IN VERY HARD AND ABRASIVE ROCK OF A DN700 CAST IRON WATER PRESSURE PIPE

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Client: KLAPFER BAU Srl – SANTATO MARCO TRIVELLAZIONI – Italy

Year: 2011

What I did: I made the detailed design and supervision of the installation by microtunneling and HDD, in very hard and abrasive quartzite-diorite rock, of a DN700 mm (28″) cast iron water pressure pipe – the work was split in two section, each one 80 m (265 ft) long. The borehole diameter was 800 mm (32″). A very challenging job for the extreme hardness and abrasivity of the rock. The water pressure pipe is part of a mini hydro-power plant in the Alps (Italy).

INSTALLATION IN VERY HARD AND ABRASIVE ROCK OF A DN700 CAST IRON WATER PRESSURE PIPE
The rig while drilling the pilot bore.
Down-the-hole air hammer ready to drill the pilot bore.
The double stage DN800 -600 back-reamer used for the final reaming
The borehole after intermediate reaming.
The borehole after the final reaming.
The auger boring machine (ABM).
A 32
The borehole after retracting the SBU, at 40 m of bore length.
Close-up of the two-rows TCI disk cutter used to complete the bore.
The borehole after retracting the SBU, at 62 m of bore length.
The borehole after retracting the SBU, at 62 m of bore length.

 

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INSTALLATION OF A GRP DN600 PIPE BY PILOT TUBING

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Client: EUROSCAVI Srl – Italy

Year: 2011

What I did: I made the detailed design and work supervising of the installation, by pilot tubing, of a DN600 (24 in) GRP pipe for the connection of two ventilation shafts in the new subway line C in Rome, Italy.

INSTALLATION OF A GRP DN600 PIPE BY PILOT TUBING
Plan view of the installation
Longitudinal section of the crossing by pilot tubing.
The guided boring machine used to complete the crossing.
One of the shafts to be connected.
The GBM (guided boring machine) during one of the intermediate reaming stage.


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DN1600 CONCRETE PIPE INSTALLATION BY MICROTUNNELING

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Client: BERRO & SARTORI INGEGNERIA Srl – CONSTA Spa

Year: 2012

What I did: I made the detailed design of the installation by microtunneling of a concrete pipe DN1600 (63 in), below the Osellino Channel at Mestre, Venezia – Italy.

DN1600 CONCRETE PIPE INSTALLATION BY MICROTUNNELING
Longitudinal section of the crossing.
Plan view of the crossing.
Detail of the jacking shaft.


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INCLINED 72″ STEEL CASING INSTALLATION BY MICROTUNNELING

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Client: B&M Ingegneria Srl  – Italy

Year: 2012

What I did: I made the preliminary and detailed design of the installation by microtunneling of a steel casing 72″ (1828 mm) 95 m long, along a 16% inclined drive, for the connection of two water tanks, at Nervesa della Battaglia for the main client ATS Srl, Italy.

INCLINED 72″ STEEL CASING INSTALLATION BY MICROTUNNELING
The designed 16% inclined path of the microtunnel.
Cross section of the installed 72
Seismic refraction survey, carried out for invisetigating the macrostructures of the hill to be crossed.
The micro tunneler used to install the 72
Starting the microtunneling
During the jacking stage.
Inner view of the installed casing.

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