关键词: 水泥改性膨胀土;侵蚀环境;干湿循环;无侧限抗压强度;侵蚀机理

Abstract: In order to study the cement modification of expansive soil stability and durability in a complex environment,the indoor simulation experiment design of pure water,different concentration and different kinds of chemical solution under cyclic drying and wetting of cement modified expansive soil erosion effect.From the initial to the failure state,recorded the changes in the development of process and volume of macro fracture sample,comparative analysis of the load displacement curve and the peak intensity of the obtained mechanical properties of expansive soil under different erosion conditions changes with the cycle number of cement,and the relevant mechanism is analyzed.The results show that the wetting and drying cycle of the corrosion environment has obvious influence on the mechanical properties of the modified expansive soil.

Key words: cement modified expansive soil;erosion environment;dry wet cycle;unconfined compressive strength;erosion mechanism