Hi Peter,Yes looking good i need to get a few viaduct pices from them sometime.
Lay some weed control matting / terram / geotextile membrane over the top of the filled holes; ideally line them with it as well. It prevents fines washing into the interstices and will allow them to collect water for many yearsThanks everyone for your concern and especially for your suggestions.
The garden slopes down from right to left which means that when the track emerges from the cutting it will be on an embankment. Now that I've finished digging the cutting and added a drainage channel (which can be seen in front of the shed) I'm hoping that I've cured the flooding problem. The water should drain into the channel which will run alongside the embankment.
I've also got a post hole borer and I intend to drill a number of holes deep holes in the trackbed which I will fill with gravel.
I don't anticipate any problems now, but next winter will be the acid test.
Thanks. It's not Gaping Gill. The shaft is Alum Pot and the aerial view looking vertically down a pothole is Calf Holes. Both are in Yorkshire.Nice video of how caves are formed, as well...
Was that the mouth of Gaping Gill (sp?) - a long time since I have been underground..
You may wish you had got on with some build judging by the forecast for today. Glad I never got seduced to play trains and got some garden tidying done. Bin day to day and it is now out for collection and it is full.It's been a nice day today so I stopped work on the railway early and ran a train instead.