Live Pipe Access / CCTV Surveys
To minimise impact on pumping schedules and where possible to eliminate
impact altogether, we have patented technology which enables PIVs
to be launched for live pressurised pipe surveys.
On a recent project for Thames Water/Optimise, we launched a PIV
with CCTV and profiling sonar via a 20m deep shaft into a live potable
water main operating at circa 8-bar. Due to operational constraints
the PIV was launched vertically down the shaft, where it turned
through 90deg at the base of the shaft to enter the tunnel to carry
out a 2.7km survey.
A custom built PIV launch cage and combined cable roller assembly
eliminated cable abrasion at the point where the vertical face of
the shaft meets the crown of the tunnel.
We have launched PIVs into pipes, tunnels, aqueducts, siphons
and outfalls from underground chambers, header tanks, shafts, reservoirs,
gate valves and custom built pressure chambers.