Page 50 - PENYIASATAN TAPAK

6. SAMPLING IN BOREHOLES

• Sampling procedures using split – spoon sampler:

• Drill a borehole to the desired depth for sampling.

• Remove the drill tools and lower the sampler to the bottom of the hole.

• Mark the drill rod at 75 mm intervals to measure the penetration

depth.

• Drive the sampler into the soil by dropping a hammer of 63.5 kg from

a height of 760 mm.

• Withdraw the sampler and detach the shoe and coupling.

• Open the two halves of the tube and remove the soil sample.