Abstract: Compared with the conventional Soil Mixed Wall (SMW) system as the deep excavation supporting system with excavation depths less than 10 meters, the hot rolled steel beam reinforced soilcement mixed wall constructed by the Trench cutting Remixing Deep (TRD) method has the cost effective as well as the advantages since the TRD wall can serves both the retaining and slurry walls. Similar to other soil cement mixed walls, the wall thickness over the entire length is usually a challenge. The nonuniform TRD walls will certainly affect the supporting performance but the case histories rarely reported. This paper presents the study of the strength distribution within the TRD constructed and hot rolled steel beam reinforced soil cement mixed walls. The impact of the strength variation within the soil mixed wall on the deep excavation supporting system is numerically investigated. It is concluded that the construction quality control during the wall excavation is critical for this type of excavation supporting system.

Key words: Deep Excavation, TRD Method, Hot Rolled Steel Beam Reinforced Soil Cement Mixed Wall, Supporting Performance, Spatial Variability, Random Field