We do quite a few cylinder replacements and each one of them is a bit different. I always tell building owners that 80% of cylinder projects go well, 10% have some additional challenges[additional costs], and 10% go sideways and require a well driller. This is the challenge before you even get a chance to see if you get a bad hole.
We are doing a project at a logistics center and while I was there I heard our compressor from the street[located at the 1st level, 2nd landing in the open air garage]. I have to say I do get excited when I hear the compressor ripping and mud spraying everywhere. When I got down to the elevator pit[B level, 1st landing] I saw the jet pipe stuck down 32’ +/- down the hole trying to break the suction/concrete. The pit channel/head/buffer combination did not help any. It reminded me that each hole is a bit different and presents its own challenging.
This typically is the first big challenge of the project. I will highlight two methods that we use when we have a cylinder that won’t move just from tugging on it.
1st method is using an air compressor to move the earth below and break the cylinder free from suction. Be aware that your line will get very hot and you need to place the compressor in the correct place[not inside]
2nd method is using jacks. This method is a bit more intensive and could be required when some kind soul dumped a bag of concrete down the cylinder hole after installation. Perhaps the concrete was put down there to stop water from coming in the hole.
Cylinder replacement is a difficult job that takes a lot of heavy lifting and good technique. Adding the requirement of trying to get a stuck cylinder out of the ground adds to the challenge of being an elevator person. At times we are doing 4 or 5 cylinder replacements a month so we get a chance to see all sorts of oddities, each one is different.
As always feel free to contact us at www.colleyelevator.com, email Craigz@colleyelevator.com or call 630-766-7230.