Hand dug trial pits
Hand dug trial pits are normally performed, depending on soil conditions, to a depth of 1.2m but can be excavated to deeper depths, depending on location and conditions, with the use of shoring or battered back to a safe angle.
We regularly undertake hand dug inspection pits for exposing services which reside just below the surface. For low disturbance areas we use hand augers in order to excavate the soil.
Other uses of hand dug trial pits include exposing existing foundations and looking at sub-surface soil strata.
Machine dug trial pits
Machine dug trial pits are typically used for the following purposes: exploring and sampling near surface soil and infiltration tests to establish the permeability of near surface soil.