Criteria for number of soil borings required?
Criteria for number of soil borings required?
(OP)
What is the recomended criteria for how many soil borings should be taken verses the size of the project plot (acres)?
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Criteria for number of soil borings required?
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RE: Criteria for number of soil borings required?
RE: Criteria for number of soil borings required?
RE: Criteria for number of soil borings required?
I agree with the points made by SirAl and BigH. Another factor that will affect the criteria on the number of soil borings is the "Standard of Practice" in the particular region and the type of construction that is being planned. As geotechnical engineers, we do not operate in a vacuum and often find pressure (in competitive bidding environments) to cut the number of borings to be in line with other competitors.
In various regions of the country there are rules of thumb for standard practice.
RE: Criteria for number of soil borings required?
para 1-4M4d says, "Borings must be at least to the bottom of proposed footings and deep enough to locate bearing strata that will support the proposed structure. When rock is encountered, depth of drilling into rock shall be at least 5 feet or enough to establish rock quality regarding voids, fissures and strength, or whether it is a bolder."
para 1-4M6 says, "Additional information must be required when unusual soil conditions may effect foundation design."
RE: Criteria for number of soil borings required?