Abstract: The seepage and strength properties for the Trenching cutting and Remixing Deep (TRD) wall as the slurry wall are critical for a safe foundation excavation projects as well as minimizing the adverse impact to the adjacent environment. This paper presents the statistical analysis results of the laboratory and insitu tests on the seepage properties of the soilmixed the walls. The seepage properties and the construction quality of the slurry walls constructed with TRD method were examined from the constructability point of view. The test results indicate that, the seepage properties of the constructed TRD wall are significantly reduced, compared with the original insitu soils, especially, silty and sandy soils. The tested coefficient of permeability of slurry wall in silty and sand soils is between 10-6 cm/s and 10-8 cm/s. The construction results show that the TRD constructed slurry can effectively separate the connections between the excavated area and soil behind the wall. It can also separate the hydraulic link of the artesian groundwater in the deep thick sandy stratum.

Key words: TRD Uniform Thickness, Seepage Properties, Artesian Groundwater, Deep Excavations