Gallery construction
Where pipe jacking is not possible because of obstacles or existing ducts being crossed, or space is simply too confined, galleries are the answer.
Gallery construction is a mining tunnelling method involving wooden, steel, or shotcrete lagging. A typical feature of gallery construction is the advance securing shell, which remains in the ground. The steel gallery method, using sheet steel securing (mini-sheet piling), can be applied to nearly any soil, dimensions, and length.