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Sampling of disturbed samples
Disturbed samples are obtained by using split-spoon sampler, which equipped with flap retainer or other attachments necessary for cohesionless soil. The split-spoon sampler is used in the Standard Penetration Test and consists of a sample barrel about 450mm in length, with a screw on cutting shoe and head.
Disturbed samples are obtained by using split-spoon sampler, which equipped with flap retainer or other attachments necessary for cohesionless soil. The split-spoon sampler is used in the Standard Penetration Test and consists of a sample barrel about 450mm in length, with a screw on cutting shoe and head.
Sampling of undisturbed samples
Undisturbed samples are taken with thin-walled tube sampler or piston tube sampler or mazier sampler as described in BS 5930 and depending on the soil conditions and SPT N value.
Undisturbed samples are taken with thin-walled tube sampler or piston tube sampler or mazier sampler as described in BS 5930 and depending on the soil conditions and SPT N value.
Sampling of rocks
Disturbed The procedure for rock drilling shall be in accordance with British Standard Code of Practice BS 5930 “Site Investigation”. The diameter of core acceptable shall be 54.00mm diameter (NMLC or NWX, NWM core barrels where X and M refers to the design of core bit). The Total Core Recovery (TCR) mean the ratio of the total length ofgood quality core over the drilling length expressed the nearest 5%. Rockuality Designation (RQD) was the ratio of the total length of the good quality core each exceeding 100mm in length over the drilling run correct to circular circumference or in the case of broken rock fragment assembled to form cores with circular circumference.
Sampling of groundwater
Ground water sample taken in accordance with BS 5930: Section 23.3 “Groundwater samples” on each occasion that ground water is encountered during boring. In all type of boring where water is added, groundwater samples should be collected by removing all water from the borehole by pumping or bailing before taking a groundwater sample from the water which collects by seepage.
Ground water sample taken in accordance with BS 5930: Section 23.3 “Groundwater samples” on each occasion that ground water is encountered during boring. In all type of boring where water is added, groundwater samples should be collected by removing all water from the borehole by pumping or bailing before taking a groundwater sample from the water which collects by seepage.
In-situ testing
The field testing that consists of placing an instrument at a precise depth in a borehole to collect data or information to determine the engineering properties of the soils and rocks.
The field testing that consists of placing an instrument at a precise depth in a borehole to collect data or information to determine the engineering properties of the soils and rocks.