永登县苦水镇大路村滑坡发育特征及稳定性评价

黄土滑坡在中国西北地区广泛发育，隐蔽性深、影响范围广、破坏性强是其典型的特点，不仅威胁着人民群众的生命财产安全，而且制约着当地经济的高质量发展。因此，正确认识黄土滑坡的发育特征与形成机理，开展滑坡稳定性评价对于黄土脆弱区地质灾害的预防预警、防灾减灾规划以及重大工程建设尤为重要。以苦水镇大路村1社滑坡为研究对象，通过地面调查、钻探、浅井勘探等多种手段，查明滑坡的形态、发育、变形等基本特征及岩土体物理力学性质，最后采用定性和定量计算相结合的方法评价稳定性状态，并圈定其危险区域。结果显示，大路村1社滑坡存在基本稳定和不稳定两种状态，其中在自重工况下处于基本稳定，但当在自重和地震叠加、自重和暴雨饱和叠加工况下均处于不稳定状态，易产生失稳下滑。滑坡一旦失稳，其覆盖范围将介于0.004～0.007 km²,这可能造成大量财产损失和人员伤亡，危害程度较大。研究结果丰富了新时期黄土滑坡灾害形成机理，为永登县在实现乡村振兴战略过程中地质灾害的治理工作提供科学依据。

Characteristics and Stability Evaluation of Landslide Community in Dalu Village, Kushui Town, Yongdeng County

Loess landslides are widely developed in Northwest China, and are characterized by deep concealment, wide influence and strong destructiveness. It not only threatens the safety of people''s lives and property, but also restricts the high-quality development of the local economy. Therefore, it is very important to correctly understand the development characteristics and formation mechanism of loess landslides and carry out landslide stability evaluation for the prevention and early warning of geological disasters, disaster prevention and mitigation planning and major engineering construction in vulnerable loess areas. The landslide of No.1 community in Dalu Village, Kushui Town was selected as the research object, Through ground investigation, drilling, shallow well exploration and other means, the morphology, development, deformation characteristics and physical properties of soil mass of landslides were identified. Finally, a combination of qualitative and quantitative methods was used to evaluate the stability of the landslide and delineate its dangerous area. The results show that the landslide of No.1 community in Dalu Village is basically stable under deadweight conditions,but it is in an unstable state when deadweight + earthquake, deadweight + heavy rain, and it is easy to cause instability and decline. Once the landslide is unstable, its coverage will be 0.004~0.007 km2, which may cause a large number of casualties and property losses, and the degree of harm is relatively large. This study enriches the formation mechanism of loess landslide disasters in the new period, and provides a scientific basis for the governance of geological disasters in Yongdeng County in the process of realizing the rural revitalization strategy.