Bore and jack - Required soil data
Bore and jack - Required soil data
(OP)
I have a project where bore-and-jack construction will be used to install a 48 inch sewer line through a 30 foot roadway embankment and I want to know what soil data is necessary beyond typical exploration bore logs?
Does anyone have a knowledge of what information a contractor will need? Are densities and gradations sufficient? Soils may be either dense granular or cohesive.
Does anyone have a knowledge of what information a contractor will need? Are densities and gradations sufficient? Soils may be either dense granular or cohesive.





RE: Bore and jack - Required soil data
RE: Bore and jack - Required soil data
2. Lots of borings esp. at the jacking pit.
3. Look for evidence of obstructions.
3. SPT's and sievs are of for sands, but strength, and permiability should be done for cohesive soils
4 observation wells with good groundwater data should be obtained for granular or cohesive, but esp. cohesive.
5. Any evidence of contamination.
6 if you are using steel pipe, consider the effects of coal ash or stray electrical currents. Both are common around railroads, both can accelerate corrosion of the pipe.
Do most jacking jobs do this - No. Do many jacking jobs have extras that run many many more times what this program will cost? Yes. Its the owners call - he can pay you now or pay the pipe jacker later.
RE: Bore and jack - Required soil data
RE: Bore and jack - Required soil data
The better the information the bidders have, the better the bids.