case study fsl beaulieu cover

Beaulieu, United Kingdom

Picote Flexi-Sliplining System

Trenchless Repair
Location:
Beaulieu, UK
Date:

April 2024

Time frame:
3 days
Pipe:

2x 80m severely corroded pipes running under a river

Work:

Picote Flexi-Sliplining System

Pipe:

DN140 (4"), 2 lengths totalling 160m

Background

An urgent pipe repair was needed! The pipes run under the river Beaulieu and were severely corroded. There was also a major issue with tidal ingress. 

The Picote Solution

Traditional slip-lining requires access pits, large winching or pushing equipment, expensive pipe welding equipment, and additional labour and plant on site.

Picote Flexi-Sliplining is a low-emission option to rehabilitate DN100-300 (4-12") non-pressure pipes. 

  • DIBt CERTIFIED Flexible 3-layered pipe with better flow properties than cast iron, concrete or clay.
  • EASY minimal training and as little as two-man crew required. Fully welded system with no bypass pumping required. Can be manhole to manhole for simple no-dig solution. Pull-resistant couplings available.
  •  FAST pulling speed of 8m (26ft) per minute! No curing required as factory produced pipe. Welding takes approx. 10 minutes per section.
  • EFFICIENT minimal equipment required. Low installation risk. Can navigate bends. It is a new pipe which means that installation is successful regardless of condition of host pipe.
  • ENVIRONMENTALLY FRIENDLY with no toxic waste. No hazardous chemicals means that it is safe for operators. No emissions during or after installation. Low raw material usage (minimal oil used in pipe) means that there are lower CO2 emissions.
  • SOLUTION FOR INFILTRATION/EXFILTRATION ISSUES
    Where there is water in the pipe, this system can be pulled in place without draining or bypass pumping! Recent UK tidal and under-river case studies.

The Picote Flexi-Sliplining Method

The Picote Flexi-Sliplining method does not require any excavation. It uses a small portable welding rig, lightweight materials and the pipe is very flexible so that all works could be carried out from the existing chambers and ground space on site. 

This particular repair would not have otherwise been possible without very expensive excavations because the pipe runs under a river. 

TRIM
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The area of grass alongside the river was ideal for assembling the pipe. The local donkeys were curious but fortunately were not affected by the work. The welding rig was set up and powered by a small generator, rollers were placed at various locations to aid the process of pulling the pipe as it grew. The small welding equipment with pipe clamps, joining frame and cutting tool were all lightweight and extremely easy to use. Both lengths of pipe were welded in a single shift with each weld taking approx. 10 minutes to complete. In total the welding of both full lengths took just one day. 

The pulling head was secured into the start of the pipe and the winch rope attached. The pipe was guided over the frame and through the pipe guide in the base of the chamber. A small battery-powered capstan winch was used to pull the pipe into place. The pulling process was carried out at a rate of approx. 8m per minute. Once the pipe was on its way there were no other additional works 
required as the pipe fed itself over the rollers and into the host pipe. 

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If you would like to book a call with one of our team to discuss you own project, please use the contact form below and we will be in touch with you as soon as possible!
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