pilot boring

pilot boring

In foundation construction, a preliminary boring or series of borings used to determine boring requirements.
References in periodicals archive ?
Installing utilities by pilot boring, the machines use a removal drill head matched to soil conditions by the operator and a series of drill rods to push and rotate the head.
Once the 2-inch pilot boring operation was under way,' Laney explained, 'it was drilled in 1,000-foot segments.