Case Histories

DREDGING FOR BRIDGE CONSTRUCTION

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Project Details

  • Location: Tennessee, USA
  • Year: 2017

Project Description

Dragflow supplied an electric dredging pump with side cutters and jet-ring system for an infrastructure project consisting in the construction of a bridge on the river. The costumer has been using the Dragflow unit to excavate for the foundations of the bridge pillars. The project consisted in lowering the sheet piling into the river bed and dredging with the Dragflow unit inside the four sheets removing the material at the bottom.
 
The problem
The customer was looking for an alternative way to excavate the bridge pillars foundation: a more efficient and faster method than the standard mechanical excavation with earth moving machine.
 
Our solution
The Dragflow solution was an electric submersible unit suspended from a crane with a steel cable (dredging pump EL25S plus two electric side excavators EXEL20). The mechanical mixing done by the pump agitator together with the cutting action of the excavators teeth and the high pressure water jets could disaggregate the compacted river bed and excavate efficiently the pillars foundations.