Filling the void left by removed pipeline..
Void filling with Benefil RG50, to prevent washouts and collapsing.
What's the situation?
A pipe section of 30m Ø300 under a main road needed to be removed completely, without road closures or digging.
To do so, one method is to pull out the pipeline as a whole. The remaining cavity then needs filling to prevent washouts and collapsing. That’s where our Benefil hardfoam RG50 comes in.
Why chose RG50?
The reason for choosing RG50 in this situation is because there’s it’s a void relatively close to the surface and the tarmac road above may not be disrupted at all after removal of the old pipe.
To prevent collapsing and provide structural strength, we advise void filling with Benefil RG50.
How was it filled?
After the original pipeline was removed, a 63mm HDPE pipe was inserted for us to fill the void.
In this case, the back end of the cavity was blocked off thus using the access point as the vent. And filling from the back to the front, as you can see on the picture reel below.
At the back, the foam starts to build up and gets pushed forward, thus ensuring a complete fill.
Here the pipe was left in place, but there can also be chosen to remove the pipe, pulling it back during filling of the void.
The video displays the ease of filling. The pipe is inserted and the pumps are left to do the work.
Which products are useable?
Depending on your needs most products are useable, from light to heavy.
The voids can be filled with products ranging from RG22 to RG5o.
In most cases RG30 is strong enough for this type of void. Although, this case was filled with a RG50 because it’s situated under a main road, the N245.