A series of adjacent piles constructed to form an earth retaining structure as a cantilever or a propped cantilever wall. Contiguous piled walls consist of a row of successive unconnected cast-in-situ concrete piles constructed with small gaps between the adjacent piles, formed using CFA or rotary bored piles (replacement piles techniques). Compared to other lateral soil supporting systems, contiguous pile walls are a more simple and economical supporting system due to reduction in cost and construction period when considering small to medium scale depths of excavations.