Functional restoration of bottom drains Roccasparvera Dam.
Functional restoration of bottom drains Roccasparvera Dam.
Main object of the work:
The work consisted of the mechanical adjustment of the two bottom outlet sluice gates, which are flat sliding, measure 3.95m x 3.69m and specifically in:
- Construction of access track in riverbed and tura, displacement and resurfacing with dismantling at end of operation
- Two-stage sluice gate disassembly with machining and subsequent reassembly
- Dimensional survey with performance of Non-Destructive Testing on diaphragm in the workshop
- Sandblasting of surfaces to grade SA2½
- Material carryover by welding and subsequent grinding and restoration of degraded surfaces
- Total restoration of side and front seals and guides
- Painting the floodgates
- Workshop servomotor overhaul with internal cleaning followed by complete overhaul and redo of internal seal and lower seals and final painting
- Overhaul, CND and repainting of control rods L 25m
- Gargami overhaul with dimensional survey, material carryover by welding and subsequent grinding to restore degraded surfaces after sandblasting and final painting
- Overhaul of drainage compartments with injections of suitable cementitious material to plug any gaps between the lining and the dam structure, carryover of material by welding and subsequent grinding to restore surfaces, replacement of particularly degraded parts with supply of new sheet metal of suitable thickness to be welded to the parts already in place, and final sandblasting and painting
- Hydraulic power unit overhaul with complete draining of mineral oil contained in the power unit, piping and servomotors, disposal of the extracted oil, cleaning and maintenance of all power unit components, replacement of the two control solenoid valves with others of modern design, filling the system with newly supplied oil
- Installation of a new digital display showing the degree of opening of each sluice gate in real time including supply and installation of the display including the derivation of signals departing from the piston area, supply and installation of signal transmission cables
- Testing and return to operation of the system
- Engineering and CND
