ISSN 1003-8035 CN 11-2852/P
    任贺明,王兴政,罗刚. 四川炉霍县寿灵寺边坡失稳机理及工程治理[J]. 中国地质灾害与防治学报,2024,35(0): 1-10. DOI: 10.16031/j.cnki.issn.1003-8035.202309033
    引用本文: 任贺明,王兴政,罗刚. 四川炉霍县寿灵寺边坡失稳机理及工程治理[J]. 中国地质灾害与防治学报,2024,35(0): 1-10. DOI: 10.16031/j.cnki.issn.1003-8035.202309033
    REN Heming,WANG Xingzheng,LUO Gang. Failure mechanism and controlling measures of cut slope instability at shouling temple, luhuo county, sichuan province[J]. The Chinese Journal of Geological Hazard and Control,2024,35(0): 1-10. DOI: 10.16031/j.cnki.issn.1003-8035.202309033
    Citation: REN Heming,WANG Xingzheng,LUO Gang. Failure mechanism and controlling measures of cut slope instability at shouling temple, luhuo county, sichuan province[J]. The Chinese Journal of Geological Hazard and Control,2024,35(0): 1-10. DOI: 10.16031/j.cnki.issn.1003-8035.202309033

    四川炉霍县寿灵寺边坡失稳机理及工程治理

    Failure mechanism and controlling measures of cut slope instability at shouling temple, luhuo county, sichuan province

    • 摘要: 四川炉霍县寿灵寺因建设未来殿需要,于场地西北侧开挖形成一高为21.8 m,坡度为55°~75°的五级开挖边坡,坡脚出现局部破坏,对周边群众生命财产安全造成严重影响。现场勘察及数值模拟分析结果表明,边坡于粉质粘土层内形成圆弧形滑动面,坡脚应力集中,在降雨条件下,土体容重增加,粘聚力与内摩擦角急剧减小,最大水平位移可达3.4 m,边坡失稳形成推动式滑坡。研究区处于高烈度地区,地震及大型机器作业产生的震动荷载将对边坡产生严重的不良影响,在地震工况下边坡形成推动式滑坡,对地基土产生剪切破坏,影响深度约5 m。考虑到边坡所需的抗滑稳定性要求及在地震工况下对地基土的破坏影响,采用抗滑桩加格构锚固对边坡进行加固,并已应用至本工程中,治理效果良好,该分析方法及防治方案可为类似人工开挖边坡工程治理提供参考经验。

       

      Abstract: The Shouling Temple in Luhuo County, Sichuan faces an urgent situation due to the construction of the Future Hall. A five-level excavation slope with a height of 21.8 meters and a slope angle of 55° to 75° was formed on the northwest side of the site, leading to local damage at the toe of the slope. Field investigation and numerical simulation analysis indicate that the slope formed a circular sliding surface within the silty clay layer, with stress concentration at the toe of the slope. Under rainfall conditions, the bulk density of the soil increases, while the cohesion and internal friction angle decrease sharply. The maximum horizontal displacement can reach 3.4 meters, resulting in a pushing-type landslide and slope instability. The study area is located in a high-intensity seismic zone. The vibration loads generated by earthquakes and large-scale machinery operations will have serious adverse effects on the slope. Numerical simulation analysis shows that under seismic conditions, the slope forms a pushing-type landslide, causing shear failure of the foundation soil with an impact depth of approximately 5 meters. Considering the stability requirements of the slope and the damage to the foundation soil under seismic conditions, reinforcement measures such as anti-slide piles with grid anchoring were adopted to strengthen the slope, which have been applied to this project with good governance effectiveness. The analysis method and control measures can provide reference experience for the treatment of similar artificial excavation slope projects.

       

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