Window Sampling

The percussive window or windowless sampling method involves driving cylindrical steel tubes into the ground using a hydraulic hammer. The drilling rigs are mounted on rubber tracks and disturbance is minimal making the rigs suitable for use on environmentally sensitive sites. The rigs are ideal for work on sites with restricted access, close-up ag...

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Hand-held window sampling

Hand-held window sampling

Percussive window sampling can also be carried out using a portable jack-hammer system. The sample tubes are driven into the ground using a hydraulic hammer and are then retrieved with the use of a compact mechanical jack.This system is ideal for use in sites with restricted access where conventional window sample rigs are unable to be used. Extra-...

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Dynamic Propping

Dynamic probing involves driving a steel cone vertically into the ground using a sliding hammer and recording the number of blows for each 100mm of penetration. The results obtained from the dynamic probe tests can be correlated to the standard penetration test (SPT).The cone diameter and angle will depend upon the chosen method. For example, the s...

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Standard penetration testing

Standard penetration testing

The standard penetration test, commonly known as the ‘SPT’, was developed to provide geotechnical engineering properties for foundation design purposes. The test is carried out within a borehole and the  results can be used to determine relative density, bearing capacity, settlement of granular soil and to correlate the approximate strength of cohe...

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