Wednesday, October 25, 2017

Preparation of Boring Logs

The detailed information gathered from each borehole is presented in a graphical form called the boring log. As a borehole is advanced downward, the driller generally should record the following information in a standard log:

1) Name and address of the drilling company
2) Driller's name
3) Job description and number
4) Number, type and location of boring
5) Date of boring
6) Subsurface stratification, which can be obtained by visual observation of the soil brought out by auger, split-spoon sampler, and thin-walled Shelby tube sampler.
7) Elevation of water table and date observed, use of casing and mud losses and so on.
8) Standard penetration resistance and the depth of SPT
9) Number, type and depth of soil sample collected
10) In case of rock coring, type of core barrel used and for each run. the actual length of coring, length of core recovery and RQD.


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