干湿循环下强风化红砂岩土强度特性及边坡稳定性研究

Research on Strength Characteristics and Slope Stability of Strongly-weathered Red Sandstone Soil under Dry-Wet Cycle

强风化红砂岩土作为一种工程中常见的土体,在干湿循环条件下易受水文因素的影响,导致强度特性改变,对工程安全造成困扰。针对此类问题,文章通过对强风化红砂岩土进行干湿循环实验,测试其在干湿循环条件下的强度特性及干湿循环对边坡稳定性的影响。研究结果表明,当强风化红砂岩土干湿循环次数达到四次以上时,边坡的稳定系数小于1.0,会导致边坡失稳。

As a common soil in engineering,stronglyweathered red sandstone soil is easily affected by hydrological factors under dry-wet cycle conditions,which leads to the change of strength characteristics and causes trouble to engineering safety.In view of such problems,this paper tests the strength characteristics of strongly-weathered red sandstone soil under dry-wet cycle conditions and the influence of dry-wet cycle on slope stability through dry-wet cycle experiments.The results show that when the number of dry-wet cycles of strongly-weathered red sandstone soil reaches more than 4 times,the stability coefficient of the slope is less than 1.0,which will lead to slope instability.