Methods of Boring and Probing
Methods of Boring and Probing
Methods of Boring and Probing
Probing
Window sampling
Percussion sampling
Trenching
Hand Augers
Power Augers (hollow stem, continuous flight or short
helical auger)
rotary core drilling
2.1.3
2.1.3
A shell is used
at least 2 m of water is put in the borehole and the shell is
then surged (moving up and down by about 300 mm)
The upward stroke draws water into the hole and forces the
soil into suspension;
the downstroke captures the soil past a non-return valve
Such
instruments
however give
Methods of Boring and Probing poor sample for
Gun Wharf, Quays, Portsmouth
Carried out by Southern
Testing in 1997
Development was worth
100 million
It will contain on completion
over 300 houses
together
bars and restaurants
14 screen multiplex
Picture provided by CJW Photography
cinema
and southern Testing Laboratories
two hotels
tall ships berth
and the 165 Millennium
Tower