Contiguous piling

Contiguous piling

These are series of piles which virtually touch each other (contiguous). The gaps between the piles are grouted to form a watertight retaining wall. Contiguous piling is a highly effective method of creating a retaining wall before excavations begins. Piled walls create a temporary or permanent retaining structure enabling safe excavation to take place after installation of the piles. 

Contiguous piling is a cost effective and practical solution when dealing with problems such as ground water or very loose strata. Closely spaced bored piles are used to form a retaining wall, in the construction of a deep basement or a cut and cover tunnel. Normal size adopted ranges from 450mm to 900mm, higher if necessary.