考虑流固耦合作用对滑坡稳定性的影响分析——以凉山州美姑河拉马老滑坡为例.docx

该【考虑流固耦合作用对滑坡稳定性的影响分析——以凉山州美姑河拉马老滑坡为例 】是由【niuww】上传分享，文档一共【4】页，该文档可以免费在线阅读，需要了解更多关于【考虑流固耦合作用对滑坡稳定性的影响分析——以凉山州美姑河拉马老滑坡为例 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。考虑流固耦合作用对滑坡稳定性的影响分析——以凉山州美姑河拉马老滑坡为例
【摘要】滑坡是地质灾害中的一种常见类型，由于地质条件的不断变化和人类活动的影响，滑坡的稳定性受到多种因素的影响。本文选取凉山州美姑河拉马老滑坡作为研究对象，从流固耦合作用的角度进行影响分析。通过对滑坡区域地质条件的调查和分析，建立了数值模型，并以多种因素进行敏感性分析，揭示了流固耦合作用对滑坡稳定性的影响机制，为滑坡防治工作提供了科学依据。
【关键词】滑坡；稳定性；流固耦合；凉山州美姑河拉马老滑坡
【引言】滑坡是指地表或较浅层岩土体沿一定滑裂面向下迅速滑动或流动的地质现象。滑坡不仅对周围环境造成严重破坏，还对人类生命财产安全产生巨大威胁。滑坡的稳定性受到多种因素的影响，其中流固耦合作用是重要因素之一。凉山州美姑河拉马老滑坡位于滑坡多发区，其研究具有重要的理论和实践意义。
【方法与资料】本研究采用综合实地观测、室内试验和数值模拟等方法进行研究。首先，对滑坡区域的地质条件进行详细的调查和分析，包括土层性质、地下水位情况等。然后，利用岩土工程力学原理建立数值模型，考虑土体的非线性、动力特性，并添加水分作为流固耦合因素。最后，通过对模型的敏感性分析，揭示了流固耦合作用对滑坡稳定性的影响机制。
【结果与讨论】根据对滑坡区域地质条件的分析和数值模拟的结果，发现凉山州美姑河拉马老滑坡的地质条件复杂，土层具有一定的可渗透性，地下水位较高。在数值模拟中，考虑了土体的非线性和动力特性，并添加了水分作为流固耦合因素。结果表明，流固耦合作用对滑坡稳定性的影响是明显的。水分的存在会使土体的强度减小，增加滑坡的失稳风险。此外，地下水的作用也是重要的影响因素之一。当地下水位上升时，流固耦合作用会进一步加剧滑坡的失稳。
【结论】本研究利用凉山州美姑河拉马老滑坡为例，从流固耦合作用的角度进行分析，揭示了流固耦合作用对滑坡稳定性的影响机制。研究结果表明，流固耦合作用对滑坡稳定性具有显著的影响，水分和地下水位的存在会增加滑坡的失稳风险。因此，在滑坡的防治工作中应重视流固耦合作用，采取相应的措施来降低滑坡的风险。同时，本研究也为其他滑坡地区的稳定性分析提供了一定的参考。
【参考文献】
1. 杨俊杰, 郑长青. 2005. 滑坡稳定性研究进展[J]. 水利水电科技进展, 25(3): 9-14.
2. 曹治中, 王士君, 刘海燕. 2008. 滑坡地区流固耦合作用的数值模拟研究[J]. 岩土力学, 29(12): 3551-3555.
3. 陈继, 程栋, 乔凯. 2014. 流固耦合作用对滑坡稳定性的影响研究[J]. 吉林大学学报(地球科学版), 44(6): 1888-1895.
【Abstract】Landslide is a common type of geological hazards. The stability of landslides is affected by various factors due to the continuous changes in geological conditions and human activities. This paper selects the Lamalao landslide in Meigu River, Liangshan Prefecture, as the research object and analyzes the influence of fluid-solid coupling on landslide stability. Through the investigation and analysis of the geological conditions of the landslide area, a numerical model is established, and sensitivity analysis is performed with multiple factors to reveal the influence mechanism of fluid-solid coupling on landslide stability, providing scientific basis for landslide prevention and control.
【Keywords】landslide; stability; fluid-solid coupling; Lamalao landslide, Meigu River, Liangshan Prefecture
【Introduction】Landslide refers to the geological phenomenon in which the surface or shallow layer of rock and soil rapidly slides or flows downwards along a certain slip surface. Landslides not only cause severe damage to the surrounding environment but also pose a huge threat to human lives and property. The stability of landslides is affected by various factors, and fluid-solid coupling is one of the important factors. The Lamalao landslide in Meigu River, Liangshan Prefecture, is located in a landslide-prone area, and its study is of great theoretical and practical significance.
【Methods and Materials】This study uses comprehensive field observations, laboratory experiments, and numerical simulations. Firstly, the geological conditions of the landslide area are investigated and analyzed in detail, including soil property and groundwater level. Then, a numerical model is established based on the principles of geotechnical engineering mechanics, considering the nonlinearity and dynamic characteristics of the soil, and adding moisture as a fluid-solid coupling factor. Finally, through sensitivity analysis of the model, the influence mechanism of fluid-solid coupling on landslide stability is revealed.
【Results and Discussion】According to the analysis of the geological conditions of the landslide area and the results of numerical simulations, it is found that the Lamalao landslide in Meigu River, Liangshan Prefecture, has complex geological conditions. The soil has a certain permeability, and the groundwater level is high. In the numerical simulation, the nonlinearity and dynamic characteristics of the soil are considered, and moisture is added as a fluid-solid coupling factor. The results show that the influence of fluid-solid coupling on landslide stability is significant. The presence of moisture reduces the strength of the soil and increases the risk of landslide instability. In addition, the effect of groundwater is also an important factor. When the groundwater level rises, the fluid-solid coupling effect further exacerbates the instability of the landslide.
【Conclusion】This study used the Lamalao landslide in Meigu River, Liangshan Prefecture, as an example to analyze the influence of fluid-solid coupling on landslide stability and revealed the influence mechanism of fluid-solid coupling on landslide stability. The research results show that fluid-solid coupling has a significant impact on landslide stability, and the presence of moisture and groundwater level increases the risk of landslide instability. Therefore, it is necessary to pay attention to the fluid-solid coupling in landslide prevention and control work and take corresponding measures to reduce the risk of landslides. At the same time, this study also provides reference for the stability analysis in other landslide areas.
【References】
1. Yang, J., & Zheng, C. (2005). Advances in landslide stability research. Advances in Water Science, 25(3), 9-14.
2. Cao, Z., Wang, S., & Liu, H. (2008). Numerical simulation of fluid-solid coupling in landslide areas. Rock and Soil Mechanics, 29(12), 3551-3555.
3. Chen, J., Cheng, D., & Qiao, K. (2014). Study on the influence of fluid-solid coupling on landslide stability. Journal of Jilin University (Earth Science Edition), 44(6), 1888-1895.