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The Twelve Days of Christmas With Hydro Cleansing | 2. Case Study NPL

“On the second day of Christmas,
my true love sent to me,
two feet of tree roots,
and Hydro Cleansing’s Mega-Heat…”

Continuing our twelve day countdown to Christmas, today’s blog is a nice juicy case study! However, this isn’t just any case study, this case study features blocked culverts, four foot long tree roots, over 50 TONNES of silt, and of course, an expert team of Hydro Cleansing engineers getting the job done. 

Back in the Summer we were called out to deal with some blocked culverts, syphons and silt traps by the NPL. On our arrival it was clear that there was something seriously big blocking the syphon under the railway, even our camera couldn’t travel underneath to get a clear picture. Upon further investigation the engineers discovered that the blockage was clusters of tree roots growing through the tunnels. Check out the full scope of works below!

blocked culvert case study christmas

Client – National Physical Laboratories | Kings River Outfall Desilting

Scope of Works – Desilting of culvert | Root cutting in syphon under railway | Desilting of silt traps

  1. The culvert in Normansfield Road had a high level of silt and elevated water level, the camera was then unable to return a picture of the internal condition of the pipe. We needed to remove this silt and reduce the flow during the survey, we then proposed to undertake this with a super combination unit taking one day to complete and resurvey.
  1. The syphon under the rail way had root ingress which prevented the passage of the camera, to remove this we needed to reduce the flow through the culvert and use high pressure root cutting with specialist root cutting nozzles suitable for large bore pipes. We took one day to complete and resurvey.
  1. The silt traps in five manholes needed de-silting, they contained an average of 1m of silt each. The silt traps are 2.5m in diameter which will yield approximately nine tonnes each. We took two days to complete.

case study blocked culvert and camera christmas

case study blocked culvert and roots christmas

Check out those roots! Job done!

Not even the Great Fire of London can erode the resilience of the capital!

The great fire of London set alight the pride of a city which bounces back from whatever disaster the world can throw at it! London is one of the most resilient and unflappable cities in the world. Hydro Cleansing are very proud to work with so many prestigious London institutions. From the Royal Parks to Thames Water, to Downing Street and the Super Sewer; we’ve worked across the length and breadth of the city. Not only that but we’ve fixed simple domestic problems and helped to deliver some of the most ambitious projects in wet waste management.

London downing street

After the great fire of London the city revived it’s spirit in a matter of weeks and began to develop into Sir Christopher Wren’s vision of it. After that Sir Joseph Bazalgette took the elegance of Wren’s design underground! He delivered the most revolutionary sewer system in the world.Spectacular Sewers

 

 

 

 

 

 

 

 

 

 

 

 

The foresight of Bazalgette is well documented and something that Hydro Cleansing aspire to.

Above ground, the city was still knee deep in waste. Road sweepers earned a respectable living and this developed into the awesome machines we have. Mega Sweep is a planned and reactive service. Working out of Croydon, our sweepers will go anywhere! Of course Hydro Cleansing wants world domination for our Road Sweepers! The Mega Sweeps are awesomely powerful and have an incredible 8 tonne capacity! We’ll always remain loyal to Croydon, Sutton and London but we’ll take them anywhere! From Azerbaijan to Zanzibar; from the Isle of Wight to the white cliffs of Dover, Mega Sweep will clear the leaves, debris, flood waste, oil etc. of the whole world!

Road Sweeper

 

London will always survive and so will Hydro Cleansing!

 

Shining a light on Joseph Bazalgette – The London Sewerage System

Being in reflective mood this morning, as Megatron returns to work, we’re remembering Sir Joseph Bazalgette.  He saved thousands of lives and created one of the seven wonders of the industrial world, the London sewer system.

One of the things that makes London extraordinary and Hydro Cleansing privileged to work here, is maintaining Bazalgette’s sewerage system. Championed by fellow engineer Isambard Kingdom Brunel, Bazalgette was appointed chief engineer of the Metropolitan Board of Works, in 1856. He had the extraordinary foresight to allow for London’s population boom. It is the foundation upon which this 8.6 million populated metropolis runs smoothly and efficiently. The sewers are now operating at a level way beyond what they were intended for.  Innovations are being developed and should be built this year to cope with London’s continuing growth, in the form of the super sewers.

We have history beside innovation, our Megatron has been repaired and upgraded. Remarkably, we have a bigger reel with up to 45000 psi! It’s back, bigger and better.

If you’re only going to do it once, do it well, and maintain it! Are your drains going to last?

“[The principle, in building a sewer system, was]  of diverting the cause of the mischief to a locality where it can do no mischief. “

Joseph Bazelgette 1819 – 1891

Bazalgette Megatron2

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