某滑坡成因机制分析及稳定性评价
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摘要
以某公路滑坡为工程背景,对其变形特征、成因机制、稳定性评价以及防治措施方面进行了较为系统的研究。结果表明:此滑坡体为牵引式滑坡,表层土体角砾土为主,局部呈饱水状态,现有排水系统不畅,加之碎砾岩质为千枚岩,遇水后表层土体力学性质指标降低幅度大,致表层土体产生蠕变滑塌;边坡稳定性对水较敏感,天然状态下,边坡处于不稳定状态;暴雨状态下,边坡稳定性系数降低幅度较大,处于不稳定状态,这与现场调查情况较吻合;处治措施建议采用抗滑桩,并将挡土墙背后及古滑坡体中的地下水及时排出,在坡面补充设置合理的排水系统,并完善已有排水系统。文章的研究思路及成果可供类似工程参考。
Taking a highway landslide as an engineering background, the deformation characteristics, formation mechanism, stability assessment and prevention measures are systematically studied. The results show that the landslide body is a traction type landslide, the surface soil is mainly breccia soil, the local soil is full of water, the existing drainage system is not smooth, and the broken conglomerate is a phyllite. The mechanical properties of the surface soil can be reduced greatly and the soil surface soil produces creep collapse, the stability of the slope is quite sensitive to water, and the slope is in an unstable state under the natural condition. The slope stability coefficients decreases greatly and is in the unstable state, which is in good agreement with the field investigation. The treatment measures suggest that the anti slide pile is adopted and the groundwater in the retaining wall and the ancient landslide body is discharged in time, and the reasonable drainage is set up on the slope. System, and improve the existing drainage system. The research ideas and achievements of this paper can be used for reference in similar projects.
Taking a highway landslide as an engineering background, the deformation characteristics, formation mechanism, stability assessment and prevention measures are systematically studied. The results show that the landslide body is a traction type landslide, the surface soil is mainly breccia soil, the local soil is full of water, the existing drainage system is not smooth, and the broken conglomerate is a phyllite. The mechanical properties of the surface soil can be reduced greatly and the soil surface soil produces creep collapse, the stability of the slope is quite sensitive to water, and the slope is in an unstable state under the natural condition. The slope stability coefficients decreases greatly and is in the unstable state, which is in good agreement with the field investigation. The treatment measures suggest that the anti slide pile is adopted and the groundwater in the retaining wall and the ancient landslide body is discharged in time, and the reasonable drainage is set up on the slope. System, and improve the existing drainage system. The research ideas and achievements of this paper can be used for reference in similar projects.
引文
[1] 黄达,裴向军,张志刚,等.某公路滑坡成因机制及稳定性[J].山地学报,2008(11):721-726.
[2] 王旭,刘东升,宋强辉,等.基于极限平衡法的边坡稳定性可靠度分析[J].地下空间与工程学报,2016(6):839-844.
[3] 胡以德,潘昌树,谢丹,等.某变形边坡抗滑桩预应力锚索挡土墙设计与应用[J].中国地质灾害与防治学报,2017(12):77-83.
[4] 路亚妮,吴兴宏,李新平.山区高速公路滑坡稳定性分析及防治对策研究[J].施工技术,2014(3):92-96.
[5] 杨德龙,张赓,郑慧,等.毕威高速公路病害边坡成因机制及稳定性分析[J].地质灾害与环境保护,2011(12):50-55.
[6] 刘静.呼和浩特抽水蓄能电站出线场边坡滑坡成因及稳定性分析[J].内蒙古科技与经济,2016(2):83-87.
[7] 周志广,王旭刚,张剑.海州露天矿北帮边坡滑动成因机制及其稳定性分析[J].地质灾害与环境保护,2016(9):20-24.
[8] 高俊宏,刘世东.堆积体成因机制及路堑边坡稳定性分析评价[J].公路交通科技(应用技术版),2018(2):14-148
[2] 王旭,刘东升,宋强辉,等.基于极限平衡法的边坡稳定性可靠度分析[J].地下空间与工程学报,2016(6):839-844.
[3] 胡以德,潘昌树,谢丹,等.某变形边坡抗滑桩预应力锚索挡土墙设计与应用[J].中国地质灾害与防治学报,2017(12):77-83.
[4] 路亚妮,吴兴宏,李新平.山区高速公路滑坡稳定性分析及防治对策研究[J].施工技术,2014(3):92-96.
[5] 杨德龙,张赓,郑慧,等.毕威高速公路病害边坡成因机制及稳定性分析[J].地质灾害与环境保护,2011(12):50-55.
[6] 刘静.呼和浩特抽水蓄能电站出线场边坡滑坡成因及稳定性分析[J].内蒙古科技与经济,2016(2):83-87.
[7] 周志广,王旭刚,张剑.海州露天矿北帮边坡滑动成因机制及其稳定性分析[J].地质灾害与环境保护,2016(9):20-24.
[8] 高俊宏,刘世东.堆积体成因机制及路堑边坡稳定性分析评价[J].公路交通科技(应用技术版),2018(2):14-148