土水离子效应对土体力学性能的影响

根据地下水离子质量浓度分布的特点,以改变土体强度为目的,对采取的水样和土样进行室内水土化学试验和物理力学试验,并从土水化学的力学效应对土体强度指标的影响效应进行统计分析。研究结果表明:地下水中的Ca2+、HCO 3-、K+和Na+等离子浓度对土体的黏聚力有明显的减弱效应,而Cl-含量对其影响较弱;离子质量浓度对内摩擦角和变形模量的影响弱于对黏聚力的影响,这为增加土体结构物稳定性措施提供一种借鉴。

EFFECT OF SOIL-WATER ION ACTION ON SOIL MECHANICAL BEHAVIOR

According to the distribution character of ion consistency in ground water and the purpose of changing soil strength,samplings of soil and ground water experiments were executed to carry through statistic and analysis of soil strength,which were made up of chemical action of water-soil and mechanics experiments.The results show the weakened effect occurs on soil cohesion with Ca2 +,HCO 3-,K + and Na + consistency change in ground water and Cl-consistency change is very small.Synchronously,the effect of ion consistency on inner friction angle and modulus index is smaller than that on cohesion for above ion.The study provides experience for improving stability of geotechnical construction.