Page 21 - Handbook GEOTEKNIK_Final_Neat

Field Testing Field Testing

Field Works Description/ Limitation Photos Field Works Description/ Limitation
Purpose Purpose
1. Standard  is an in-situ  dependent on Penetration 75 75 75 75 75 75 N-

Penetration Test dynamic the (mm) value 2. Boreholes  to obtain disturbed samples, undisturbed  dependent on the competency level of
(SPT) penetration competency samples and rock samples operator (i.e. to be operated by skilled
test designed level of Blow counts 1 3 5 7 7 9 28 workers)
to provide operator (i.e. to  to get soil layers description
information be operated by Seating Test  to follow termination criteria accordingly
on the skilled workers) Drive Drive  to do SPT test
geotechnical
engineering  to follow Figure 2: Calculation of N-value
properties of termination Note:
soil. criteria
accordingly Bore logs should record:
 to obtain SPT
N-value a. Reduced level (RL) of boreholes

 to determine b. Ground water level in the boreholes
the
consistency
of soil strata

 SPT N-value
to be used in
analysis &
design
purpose

Figure 3: Schematic Diagram of SPT

4 PUBLIC WORKS DEPARTMENT MALAYSIA GEOTECHNICAL ENGINEERING HANDBOOK 5