干湿循环下棉花秸秆纤维加筋盐渍土强度及其劣化研究

Study on Strength and Deterioration of Cotton Straw Fiber Reinforced Saline Soil Under Dry and Wet Cycle Conditions

为了改善盐渍土强度低的不良工程特性,可采用棉花秸秆纤维加筋盐渍土来提高其抗压强度。以纤维质量加筋率为影响因素,进行了加筋效果试验,结果表明:纤维加筋土抗压强度提高26.6%,最优加筋率为0.4%;而后施加20次干湿循环,研究纤维加筋土抗压强度劣化规律为:经过20次干湿循环,最终抗压强度下降2.3%,总体随干湿循环次数呈现先增大后减小的趋势。

In order to improve the poor engineering properties of the strength of saline soil,cotton straw fiber is used as the reinforced material to improve its compressive strength.According to the influencing factors of fiber mass reinforcement rate,the reinforcement effect is obtained:the compressive strength of fiber reinforced soil is increased by 26.6%,and the optimum reinforcement ratio is 0.4%;then 20 dry and wet cycles were applied to study the deterioration of compressive strength of fiber reinforced soil under dry and wet cycling conditions.The results show that after 20 dry and wet cycles,the final compressive strength decreases by 2.3%,the compressive strength increases first and then decreases with the frequency of dry and wet cycles.