Abstract: This paper presents a case history of applying the soil mixing wall (SMW) method in the deep excavation supporting in the soil soils. The frequently countered problem and solutions in the excavation supported are discussed. One of the advantage of the SMW method over the other supporting methods is that the hot rolled steel beams can be reused after the supporting completion and the costing saving could be as much as 40%. Compared with the castinplace concrete soldier pile method, the SMW method has the advantage of simpler construction procedure, faster construction schedule and less disturbance to the adjacent environment.It is concluded that the SMW method has the advantage over other conventional supporting methods in the deep excavation supporting in soft soils.

Key words: Soil Mixing Wall (SMW) Method, Deep Excavation in Soft Soils, Comparative Analysis, Soldier Pile Wall