I am the low man on the totem pole among many who have their hats in the ring on this project (geotechnical engineer, structurual engineer, foundation engineering contractor, city building inspector, geologist.) Many competing ideas.
The site is a 1:1 ascending slope composed of bedrock (with 1-4 feet of silty sand overlaying the bedrock. The bedrock is composed of slate, hard to moderately hard, folded and contorted. There is a lack of consistent structural planes of weakness. Height of the slope is 45-50 feet. Length of the site is 85'.
Preliminary design idea is to obtain concrete box of roughly 30 x 20 x 10 feet for basement, with additional height of 8' for first floor living area. Structure would then support two more stories of wood framing of same square footage (~600 sq. ft.) To obtain this, slope would be cut 32-34' for length and 22' depth. Rear retaining wall would be ~18 feet.
Geo report indicates that vertical cut slope may be excavated up to 12', and after that temporary shoring required.
Any ideas on most practical and economic way to get a 30x20x18 concrete box into the slope?
The site is a 1:1 ascending slope composed of bedrock (with 1-4 feet of silty sand overlaying the bedrock. The bedrock is composed of slate, hard to moderately hard, folded and contorted. There is a lack of consistent structural planes of weakness. Height of the slope is 45-50 feet. Length of the site is 85'.
Preliminary design idea is to obtain concrete box of roughly 30 x 20 x 10 feet for basement, with additional height of 8' for first floor living area. Structure would then support two more stories of wood framing of same square footage (~600 sq. ft.) To obtain this, slope would be cut 32-34' for length and 22' depth. Rear retaining wall would be ~18 feet.
Geo report indicates that vertical cut slope may be excavated up to 12', and after that temporary shoring required.
Any ideas on most practical and economic way to get a 30x20x18 concrete box into the slope?
