侵蚀和冻融环境下水泥土强度的试验研究*

摘要

There are some special regions underground foundation affect environmental erosion and freezing and thawing cycles.By experiment methods,the mechanical effects of cement soil are dis-cussed in the condition of different environment erosion and freezing and thawing cycles.Experi-ments show the chemical erosion and freezing and thawing cycles have dual effects on mechanical property of cement soil.Environmental erosion influence is throughout the whole process,and freezing and thawing effect is associated with freeze-thaw cycles.The study has important guid-ance of special environmental foundation design and proj ect application.%某些特殊地区的水泥土地基既受到环境侵蚀又受到冻融循环的影响。通过室内试验的方法，研究水泥土先经受不同浓度和不同 pH 值的侵蚀性溶液侵蚀下，经过反复冻融后水泥土的强度特征，并探讨其强度改变的机理。试验结果表明，水泥土的强度特性受水化学作用和冻融循环的双重影响，其中水化学作用的影响贯穿全过程，冻融的影响与冻融循环次数关系紧密。结果可为特殊环境地基的设计与工程应用提供指导作用。