Abstract: The remolded loess samples from Weinan backfill sites were directed shear tested under various moisture contents. The results indicate that, under the same normal pressure, the shear strength of loess soil sample decreases with the moisture content increase. The cohesion initially increases with moisture content and decreases at higher water contents. The internal friction angle reduces with the increase of moisture content. The natural moisture content has large impact on the properties of remolded loess.

Key words: Backfilling Loess, Moisture Content, Shearing Rate, Shear Strength