Abstract: In order to increase the strength and anti-deformation capability of seaside saline soil, it can be reinforced by wheat straw or solidified by lime respectively or jointly. Unconfined compressive test for heavy compaction samples of 152 mm in diameter and lightly compaction samples of 102 mm in diameter, as well as triaxial shear test for samples of 61.8 mm in diameter have been carried out in succession of axial strain at failure of reinforced saline soil and reinforced lime-saline soil be calculated for analyzing its anti-deformation capability. The results indicated that anti-deformation capability of reinforced soil gradually weakens with the increase of water content of soil, but enhances gradually with the increase of reinforced length and reinforced ratio of wheat straw, and then decreasing after surpassing certain reinforced length and certain reinforced ratio. The optimal anti-deformation capability of the reinforced saline soil depends upon the reinforcement conditions by wheat straw. The suitable length is 50 mm for the heavy compaction sample, its suitable reinforced ratio is 0.25%. For the lightly compaction sample, they are 30 mm and 0.25% respectively. For the reinforced by lime soil sample of 61.8 mm in diameter with uniform reinforcement in the upper part, entirely, and in the lower part, they are 20 mm and 0.25% respectively. The joint reinforcement by wheat straw and line enhances the strength and anti-deformation capability of the seaside saline soil.

Key words: civil engineering, fiber sein forced soil, anti-deformation capability, axial strain at failure, saline soil