Diaphragm wall is a kind of retaining wall which appropriate for using in a limited area of work and better protection than the "Sheet Pile" type. Diaphragm wall can deep penetrate vertically and perform as a pile in carrying the weight. Then this wall is best for the building which has a deep foundation or many storeys of underground level. With selected and carfully quality control for materials used such as concrete, steel bar, and bentonite for stronger and better reinforcement.
