cn301-geoenviromental engineering

1. CIVIL ENGINEERING DEPARTMENT
GEOENVIROMENTAL ENGINEERING
THE ADVANTAGES AND DISADVANTAGES OF SITE INVESTIGATION
TOOLS AND EXPLORATORY TECHNIQUES
CN 301 PREPARED BY GROUP 4

2. GROUP MEMBER:
KARLOFF LUKIN
07DKA10F2030
SABRI ARIP
07DKA10F2050
GEORGE B. MAJUNTING
07DKA10F2147
ABDUL MUHAIMIN B. INGGU
07DKA10F2149

3. CN 301 – GEOENVIROMENTAL ENGINEERING
INTRODUCTION

4. CN 301 – GEOENVIROMENTAL ENGINEERING
INTRODUCTION
 To describe the advantages and
disadvantages of site investigation tools and
exploratory techniques.

5. CN 301 – GEOENVIROMENTAL ENGINEERING
SITE INVESTIGATION
TOOLS

6. CN 301 – GEOENVIROMENTAL ENGINEERING
EARTH AUGER
ADVANTAGES DISADVANTAGES
 Can be manually  Can reach to 109-
turned, handheld 110dB. (noisy)
device or powered
by an electric motor
or internal
combustion engine.

7. CN 301 – GEOENVIROMENTAL ENGINEERING
cont.

8. CN 301 – GEOENVIROMENTAL ENGINEERING
BAILER
ADVANTAGES DISADVANTAGES
• No power source • High maintenance
needed portable. • Heavy
• Inexpensive

9. CN 301 – GEOENVIROMENTAL ENGINEERING
cont.

10. CN 301 – GEOENVIROMENTAL ENGINEERING
SPRING STEEL FINGERS
ADVANTAGES DISADVANTAGES
 A finger like device  Any loose, sandy
installed at the sediments more
bottom of the difficult to retain in a
aluminums core core tube.
tube called a core
catcher prevents
sediment from
falling out of the
tube.

11. CN 301 – GEOENVIROMENTAL ENGINEERING
cont.

12. CN 301 – GEOENVIROMENTAL ENGINEERING
SPLIT SPOON SAMPLER
ADVANTAGES DISADVANTAGES
• Easy to obtain • High maintenance
samples in
unconsolidated • Need skill workers.
materials above 100ft.
• Produce vey good
quality samples for
both lithological
description and
chemical analysis.
• Relatively efficient
and inexpensive at
shallow and

13. CN 301 – GEOENVIROMENTAL ENGINEERING
cont.

14. CN 301 – GEOENVIROMENTAL ENGINEERING
EXPLORATORY
TECHNIQUE

15. CN 301 – GEOENVIROMENTAL ENGINEERING
GRAB SAMPLING
ADVANTAGES DISADVANTAGES
• Low cost • Depth limit: surface-
• Quick 0.5m
• No access • Impractical in
restrictions difficult soil
• Minimal soil conditions
disturbance • Care is required to
ensured the quality
of sample recovered

16. CN 301 – GEOENVIROMENTAL ENGINEERING
HAND AUGER, SPLIT BARREL
DEVICES
ADVANTAGES DISADVANTAGES
• Low cost • Depth limit: 2-3 m (with
ease)
• Quick • Impractical in difficult
soil conditions
• No access
• Care is required to
restrictions ensured the quality of
• Minimal soil sample recovered
• Limited ability to
disturbance observe the nature of
the material
• Labour intensive

17. CN 301 – GEOENVIROMENTAL ENGINEERING
TEST PITS
ADVANTAGES DISADVANTAGES
• Lower cost than • Extent of soil
disturbance,
boreholes occupational exposure,
• Relatively quick compaction
• Ability to make • Depth limit: 3-5m
depending on
detailed excavator
observations of the • Impractical in unstable
strata soil conditions and hard
rock
• Ability to recover • Not suitable for
samples installing monitoring
bores due to

18. CN 301 – GEOENVIROMENTAL ENGINEERING
BOREHOLE
ADVANTAGES DISADVANTAGES
• Minor disturbance of soils • More expensive than
• Limited occupational other techniques
exposure • Limited ability to
• Accurate recovery of observe materials
samples
• Air rotary rigs not
• Ability to sample at depth suitable for volatiles
• Suitable for most ground
conditions • Can cause preferential
pathways for
• Can be used for installing
groundwater and gas contaminant migration,
monitoring wells if not appropriately
constructed

19. CN 301 – GEOENVIROMENTAL ENGINEERING
CONCLUSION

20. CN 301 – GEOENVIROMENTAL ENGINEERING
CONCLUSION
Peralatan untuk penyiasatan tapak adalah
penting untuk mendapatkan data yang
diperlukan sebelum memulakan apa-apa
pembinaan. Peralatan masing-masing
mempunyai kelemahan dan kelebihan
tersendiri. Kesilapan tidak semestinya
daripada peranti tetapi ia juga daripada
kecuaian manusia.