The upgradeable Blair VIP (uBVIP) - SuSanA

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Stages of construction - lining the pit with bricks The size of bricks varies considerably, but about 400 -500 farm bricks are normally enough to line a pit of this size. The pit is lined so the internal diameter within the brickwork is 1.4m. This diameter is maintained for 1.5m above the base of the pit. Then the corbelling begins, with each course being stepped in by about 20 -25mm. The brickwork should rise above ground level by about 2 courses. The external diameter of the uppermost course should be slightly larger than the slab diameter of 1.2m.
Stages of construction - lining the pit with bricks At 2m depth a man can line the pit by standing on the pit base and take bricks laid around the rim of the pit. The cement mortar is passed down into the pit in a bucket. If pupils line the pit, the bricks are thrown down to them. A simple ladder is used to enter and leave the pit. As the corbelling proceeds the gap between the brickwork and dug pit increases.
Page 1 and 2: The upgradeable Blair VIP (uBVIP) -
Page 3 and 4: Why the uBVIP has been introduced?
Page 5 and 6: What is the uBVIP? The uBVIP is a c
Page 7 and 8: The aim is get much wider coverage
Page 9 and 10: The “start up” technology consi
Page 11 and 12: The pit is capped by a 1.2m concret
Page 13 and 14: Using a single 50kg bag of Portland
Page 15 and 16: The uBVIP is built in three stages.
Page 17 and 18: At first the toilet may be of the s
Page 19 and 20: Fly and odour control in pre-BVIP t
Page 21 and 22: Building the BVIP in stages 1. Cons
Page 23 and 24: Making the concrete slab Making the
Page 25: Stages of construction - line the p
Page 29 and 30: Stages of construction - lining the
Page 31 and 32: Stages of construction - fitting th
Page 33 and 34: Configuration of spiral brick super
Page 35 and 36: Configuration of spiral brick super
Page 37 and 38: Building the spiral wall using the
Page 39 and 40: Making the roof with timber frame a
Page 41 and 42: Specialised pit linings. 1. Partial
Page 43 and 44: Specialised pit linings. 2. subsurf
Page 45 and 46: COSTS Slab and substructure Cement

The upgradeable Blair VIP (uBVIP) - SuSanA

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