The Old Ruminator
Well-known member
At Vurley we used 7m of 1m concrete pipe. That basically because they were lying redundant in the next field. The dig also had a sturdy hut a few metres away so these seemed the best reason to dig there. Mostly in my long digging career we have resorted to scrounging for free the materials that we used. We also got 60m of free scaffold tubes for Vurley. Now we have three shaft digs going and it was time to try another approach. We came across Twinwall plastic pipe. By sheer luck a contact in the caving world got us about ?3,000 for nothing as the pipes had been used in a major construction job and were then discarded. New Twinwall comes in 6 metre lengths at 900 mm , 750mm and 600mm internal diameter. The Twinwall 900mm cost ?1,200 new. One end has an overlapping flange taking the external diameter to 1020mm. ( best remembered if using shuttering ). Twinwall cam be carried or rolled, cut and takes impact screw bolts. We got enough 900mm for the three shafts plus some 600mm. All had been cut for use to about 1.5m length which suited us fine. A club member delivered them to site in his camper van. The images show the process of shaft construction using Twinwall.
At Vurley using concrete pipes which needed a machine to put them in place. Ultimately the machine cost us ?1.500 for excavation and pipe fitting.
Stage one of the excavation at " Ramson's One ".
Our prize from the forum competition at "Ramson's One ".
At Vurley using concrete pipes which needed a machine to put them in place. Ultimately the machine cost us ?1.500 for excavation and pipe fitting.
Stage one of the excavation at " Ramson's One ".
Our prize from the forum competition at "Ramson's One ".