甘肃省东乡族自治县汪集镇斜坡稳定性评价及地质灾害防治研究

Study on slope stability evaluation and geological disaster prevention in Wangji Town,Dongxiang Autonomous County,Gansu Province

甘肃省东乡族自治县汪集镇斜坡位于黄土丘陵地貌区,总体地势为北西高、南东低,地质条件简单。斜坡由X_(1)、X_(2)、X_(3)三段组成:根据定性分析及定量计算,在自重工况条件下X_(1)、X_(2)、X_(3)都处于欠稳定状态;在自重+地震工况、自重+强降水工况条件下X_(1)、X_(2)、X_(3)都处于不稳定状态。X_(1)、X_(3)不稳定斜坡灾情均为小型;X_(1)、X_(3)不稳定斜坡险情等级为中型,X_(2)不稳定斜坡险情等级为大型。采取村民紧急搬迁避让、对不稳定斜坡提出“落水洞和裂缝回填+削坡+锚杆格构+锚索肋板墙+截排水”的方案治理。

The slope of Wangji Town,Dongxiang Autonomous County,Gansu Province,is located in the loess hilly landform region,and the overall topography is high in the northwest and low in the southeast,with simple geological conditions.The slope consists of X_(1),X_(2),X_(3) sections.According to the qualitative analysis and quantitative calculation,X_(1),X_(2) and X_(3) are in the unstable state under the dead weight condition.Under the conditions of dead weight+earthquake and dead weight+heavy precipitation,X_(1),X_(2) and X_(3) are in unstable state.X_(1)、X_(3) unstable slope disasters are small;X_(1),X_(3)′s danger level unstable slope is medium;X_(2)′s danger level of unstable slope is large.The emergency relocation of villagers was adopted to avoid the unstable slope,and the solutions of"falling hole and crack backfilling+slope cutting+anchor lattice+anchor cable rib wall+cut drainage"were put forward.