This non-waterproof form of site retention is constructed utilising cast-in-place piling techniques (typically bored or CFA piles) to form a row of touching, or closely spaced abutting piles. These piles are used for underpinning adjacent structures and for lateral ground support to excavations, in ground conditions of all kinds.

Pile diameters may typically range from 400mm to 900mm and may be either in a cantilevered free-standing, or anchored form. The use of reinforced concrete may offer a considerable economic saving over other forms of ground retention piling, particularly in circumstances where the piles can be incorporated as part of the permanent structure.

In situations where vibration or noise generated by driving piles is unacceptable, this form of retention piling has a distinct advantage.

With its technical expertise and wide range of drilling equipment, Vibro-pile can both design and install contiguous piles for a variety of soil conditions.