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.
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.
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
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
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
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
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
CN 301 – GEOENVIROMENTAL ENGINEERING CONCLUSIONPeralatan untuk penyiasatan tapak adalahpenting untuk mendapatkan data yangdiperlukan sebelum memulakan apa-apapembinaan. Peralatan masing-masingmempunyai kelemahan dan kelebihantersendiri. Kesilapan tidak semestinyadaripada peranti tetapi ia juga daripadakecuaian manusia.