End of disassembly work
After a year and a half of work, the Ciply-Pâturages air link is now completely dismantled.
In total, 66 pylons spread over a stretch of 8 kilometers were removed from the municipalities of Mons, Quévy, Frameries and Colfontaine.
Press visits site of dismantling work on Ciply-Pâturages line
On 23 October, Elia invited the local press to visit the site of dismantling work on the high-voltage overhead line linking the Ciply and Pâturages substations.
As you may recall, the line comprises 66 pylons and covers a distance of 8 km. In view of its age and to ensure public safety, Elia decided to dismantle the entire connection. The first phase of the work began in September 2017. The project team took down the first three-phase transmission line in order to reduce the weight on the pylons.
In October 2018, the technical teams embarked on the second phase of the project, which involves a number of stages:
- Pulling the conductors: the cables are placed on pulleys around which the conductor is wound on a reel.
- Taking down the pylons: using a telescopic crane. Depending on the size of the pylon, it will be taken down in one or more pieces.
- Dismantling the foundations: using either a telescopic crane or a pneumatic drill, depending on how deep the foundation is.
The dismantling of the pylons, which started in October, is a spectacular sight. A crane holds the top of the pylon while a huge claw cuts it into pieces.
Elia invited journalists to come and watch this exciting moment. It was also an opportunity to answer their questions.
The work is expected to last five months, until the end of the first quarter of 2019.
Any questions? Give us a call!
A project that starts with dismantling the conductors
In early May, Elia began installing 48 wooden frames along the existing overhead line. Work will commence with the conductors' removal along a roughly 2 km section of the line, comprising 12 to 18 pylons. The removal should take one week, starting with Ciply.
More specifically, the removal work will entail taking the conductors attached to small steel cables and then using a puller-tensioner to wind them onto reels at the end of a section. Next, the steel cords will be replaced by nylon cords that will ultimately be removed by hand.
A brochure was handed out last week. The brochure summarizes the most important information on the organization of the works and its planning. Click here to view the brochure.
If you have any questions, please feel free to call us on 0800 18 002 or contact us by sending an e-mail to email@example.com.
Dismantling work begins:
A multi-stage project
The 70kV overhead line linking the substations at Ciply and Pâturages dates back to 1932. Comprising 66 pylons over a distance of 8.1 km, it is showing significant signs of wear. Since this makes it no longer fit for purpose, and to guarantee public safety, Elia decided to fully dismantle the connection.
The project will be broken down into a number of stages. Stage one started in August and September 2017, when work began on improving the line's reliability. Several further stages will follow in 2018. Starting at the beginning of May, wooden frames will be put in place to support the disassembly of the line's conductors.
Next, from mid-June onwards, Elia's teams and the contractor will start the line's full removal. This will entail:
- removing the conductors by the end of July;
- dismantling the pylons and foundations (this will be the project's final stage).
According to the provisional schedule, the line should be fully dismantled by the end of October.
Elia is committed to maintaining proactive communication throughout the project. In June, a brochure will be distributed to the local residents affected by the dismantling operation to explain what it is all about and present the methods used and a provisional schedule for the work involved. The project web page will also be updated regularly.
In addition, a toll-free number (0800 18 002) and dedicated e-mail address (firstname.lastname@example.org) can be used by anyone with questions about the project.
Ores begins to upgrade its network
Ores is currently starting to upgrade its network on Rue du Temple in Frameries. Please contact Ores if you have any questions about this work.
Elia starts dismantling the high-voltage line between Ciply and Pâturages
The planned upgrade remains essential
The project to build a 150kV underground line between Ciply and Pâturages is currently at a temporary standstill following the rejection of Elia's permit application.
Elia maintains that the replacement of the current 70kV overhead line between Ciply and Pâturages is essential for guaranteeing the region's security of supply in the medium term and supporting its economic development.
Various possibilities for realising this new connection are currently being studied. Elia will contact the local authorities again to work out together how best to relaunch the project.
However, as the existing overhead line is no longer fit for purpose and could pose safety risks, Elia decided to start dismantling it without waiting for the new connection to become operational. Work designed to improve the reliability of the line will be carried out in August and September, pending full dismantling, which will begin in the first half of 2018 when the necessary permits have been obtained.
Despite the dismantling of the 70kV line, the area's short-term security of supply will be guaranteed. It will rely on close cooperation between Elia and the distribution system operator (ORES), which is currently carrying out work to consolidate its distribution system in the region.
A vital link for ensuring the region's security of supply
The current 70 kV double overhead line comprises 66 pylons and covers a distance of 8.1 km. The line, which connects the Ciply and Pâturages substations, dates from 1932 and is showing significant signs of wear.
Short-term security of supply will be guaranteed through close cooperation with the distribution system operator ORES, which has carried out work to consolidate its system.
This work entailed laying medium-voltage cables between the Jemappes and Ciply substations to strengthen the grid (also known as a trunk connection). In the event of an incident affecting the 70 kV connection that supplies the Pâturages substation, the ORES grid will ensure security of supply in the region.
Despite the consolidation work, a new high-voltage electrical connection between Ciply and Pâturages remains vital, both to guarantee security of supply and to respond to the region's economic development, including the integration of renewable energies.
A new project team is currently analysing the various options, Elia's ultimate aim being to come up with a solution that has the support of all the project's stakeholders.
What does the dismantling work entail?
Elia is dismantling the existing connection in sections. The team will therefore:
Remove the conductors along the entire line, per section more or less 2 km long, comprising between 12 and 18 pylons.
Remove the pylons, either whole or in pieces.
Remove the foundations.
Restore the soil.
Generally speaking, the four-step dismantling process takes a week to complete. Dismantling will begin at Ciply and work back towards Pâturages.
How are the conductors removed?
The conductors are placed on pulleys on each pylon. At the end of the section, the conductor is wound on a pulling machine, which will pull the conductor and wind it onto reels.
At the other end, the conductor is attached to a steel cable, which is itself connected to a braking machine that is used to slow the unwinding and ensure that the conductor does not drop too low. The steel cables are then replaced with nylon ropes, which are eventually removed manually.
How are the pylons removed?
A telescopic crane is brought to the site and the hoisting cable is attached to the top of the pylon. The pylon is removed in one, two or three pieces depending on its size and weight. The pieces are then taken to an accredited waste processing centre.
How are the foundations removed?
The foundations are removed either by crane at the same time as the last part of the pylon or by pneumatic drill to a depth of at least 80 cm below ground level.