Abstract: In order to evaluated the shear strength characteristics of the remolded granitic residual soils with various degrees of compaction, extensive laboratory tests were conducted with samples under three different moisture contents and various degrees of compaction. The maximum dry density of the granitic residual soil was obtained through Proctor test. A series of consolidated direct shear tests were performed to evaluate the relationship between the shear strength and the degree of compaction. The results con lead to the following conclusions: 1) under the lower degree of compaction, the shear strength increase with the deformation value; at lower moisture content, with the increase of the degree of compaction, the shear strength demonstrates the reduction of the residual strength after the peak strength and the fragile failure mode can be observed. 2) Under the same moisture content, the internal friction angle and the apparent cohesion increase with the degree of compaction. 3) Under the same degree of compaction, the internal friction angle obtained from the consolidated direct shear tests is insensitive to the moistures content but the apparent cohesion is relatively sensitive to the moisture content.

Key words: Granite Residual Soil, Moisture Content, Degree of Compaction, Cohesion, Friction Angle