Geotechnical and Materials Engineering Standards for Bridge ...

lNTRODUCTION
The Dimond Drilling Lug of Test Boring form H482 that has been used
for rock cores is obsolete. For some t ime a new log has been considered.
The new form is similar in many respects to the Test Hole Log Hl81.
In producing this new form, I have drawn extensively on the references
Listed at the end aE the report and have used the preliminary work of
E . Hayden and V . Eisbrenner . Lngs from various geatechnlcal consul tanrs
have also been reviewed. The top of the log is like the tap of the Test
Hole Log but blank spaces for hole orientation (inclination and
dksection), name of person logging the Cora and date of logging, have
been added. The log itself consists of 11 columns; the purpose of each
is described below. The bottom of the log contains a brief explanation
of some of the column headings.
LBc DESCRTPTION
DRILLING DETAIfS - This column records information associated wfth
the actual drilling of the hole. The type of drill, core
barrel and bit are nosed along with the length of casing and
type of drilling fluid. The water table and location of
piczometers, if installed, are also noted.
DEP"SN - Depth in metres along the hole from the collar. Conversion
from drillers imperial units used by the driller may be
necessary. Normal practfce is to use one divisian on the log
per metre.
I.,