Geology Reference
In-Depth Information
ush and
groundwater encountered, etc. one would need to examine the GI
contractor
conducted, how long it took, casing used, information on
s log for the same hole. The factor that distinguishes this
log from the HK and UK examples is the attention to detail in describ-
ing each discontinuity, with information on roughness,
'
ll and
mineral coatings, as applicable. That said, this log is really only a
preliminary step. After considering other details regarding the site,
not least results from instruments monitoring ground movements
and water pressures, then sections of core where movement is sus-
pected were examined and logged in even greater detail, with samples
taken for strength testing, microscopic examination and chemical
analysis.
in
D.3 Contractor
s trial pit logs
'
Examples from the UK and from Hong Kong are presented in D4 and
D5 respectively. Descriptions and classi
ect local stan-
dards and codes. The UK example is essentially the same as a borehole
log (one-dimensional). The HK example is more graphic and shows all
four sides of the pit. As is common practice in HK, large block samples
were taken at depths of 1.5m and 3.0m. These are cut by hand,
covered in foil, waxed and placed in a wooden box for transportation
to the laboratory, where they are opened, described and prepared for
testing, as illustrated in
Figure 4.12.
cation used re