氯化钠腐蚀及干湿循环条件下水泥土的力学特性

Mechanical properties of cemented soil under condition of sodium chloride corrosion and dry-wet cycles

为了研究复杂环境条件下水泥土的力学特性,设计了水泥土室内试验,研究了不同浓度氯化钠溶液及干湿循环侵蚀条件下水泥土的强度变化规律,得到了水泥土的应力-应变曲线以及无侧限抗压强度随腐蚀时间、氯化钠浓度及干湿循环次数的变化规律.结果表明,随着腐蚀时间、氯化钠溶液浓度以及干湿循环次数的增加,水泥土无侧限抗压强度逐步降低,且在氯化钠溶液和干湿循环双重条件侵蚀作用下对水泥土无侧限抗压强度的影响相比氯化钠溶液侵蚀条件下更为明显.

In order to study the mechanical properties of cemented soil under the complex environmental conditions, the cemented soil laboratory experiment was designed. The variation rule in the strength of cemented soil under the corrosion condition of sodium chloride solution with different concentrations and wet-dry cycles was investigated. In addition, the stress-strain curves of cemented soil and the variation of unconfined compressive strength with the corrosion time, concentration of sodium chloride and times of wet-dry cycles were analyzed. The results show that with increasing the corrosion time, concentration of sodium chloride solution and times of wet-dry cycles, the cemented soil unconfined compressive strength gradually decreases, and the effect on the unconfined compressive strength of cemented soil under the dual erosion condition of both sodium chloride solution and wet-dry cycles is more obvious than that under the condition of sodium chloride solution erosion.