膨胀土强度影响因素探讨

膨胀土地区的工程灾害防治问题日益突出，其本质问题是土体强度的变化。研究表明，膨胀土的强度是内因和外因等多种因素综合作用的表现，影响膨胀土强度的内在因素主要有膨胀土自身的物理特性、结构特征、矿物成分及含量，外在因素主要有取土样及试样制作过程中的扰动对土体结构性的破坏程度、试验条件及方法等。

Discussion on the Factors Effecting on Strength of Expansive Soil

The prevention and treatment of engineering disasters is gradually bad in the areas of expansive soil because of the strength change. A series of study shows that the inner factors and the outer factors both affect the strength of expansive soil, the inner factors include itself physical characteristics, structure characteristics, the element of mineral and ratio, the outer factors include the specimen, the disturbance in operating, the damage of soil structure, the circumstance and methods of test and so on.