The aim of this study is to mitigate the adverse impacts of saline-carbonated soils in the Songhua River and Nenjiang River Plain on engineering and to weaken the damage caused by freeze-thaw cycles on saline-alkali soils in regions of seasonally frozen ground by using lime and fly ash to solidify saline-carbonated soils.The study in-vestigates the effect of different improvement schemes on the shear strength of saline-carbonated soils and their abili-ty to withstand freeze-thaw cycles.The solidification schemes are evaluated using the entropy-weighted TOPSIS mod-el.Results indicate that both lime and fly ash have enhanced the shear strength of saline-carbonated soils.However,the solidification effect of lime is significantly superior to that of fly ash and has transformed the stress-strain curve of saline-carbonated soils into one with strain-softening behavior.Fly ash has distinguished performance in enhancing the resistance of saline-carbonated soils to freeze-thaw damage.The admixture of both lime and fly ash comprehen-sively accounts for shear strength and resistance to freeze-thaw damage.From the perspective of mechanical proper-ties,freeze-thaw resistance,and economic factors,the optimal solution is the use of 12％lime and 12％fly ash.
关键词
季节冻土区/改良碳酸盐渍土/无机材料/熵权-TOPSIS模型
Key words
seasonally frozen ground region/solidified saline-carbonated soil/inorganic material/entropy weight-TOPSIS model
维普
万方数据