三峡库区巴东县岩湾桥滑坡成因机制及稳定性分析
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摘要
以巴东县岩湾桥滑坡为例,结合其变形特征分析了滑坡的成因机制,计算了滑坡在不同工况下的稳定性。结果表明:在"自重+地表荷载"工况下滑坡处于基本稳定状态,在"自重+地表荷载+20年一遇暴雨"工况下则处于不稳定或欠稳定状态,无论哪种工况组合,其安全储备都不足,必须对其进行治理。
Taking Yanwan bridge landslide in Badong county as the example,the deformation characteristics was used to analyze the mechanism of the landslide. Then the stability of the landslide under different work conditions was calculated. The results indicate that the landslide is basically stable under the condition of" self-weight + surface load "and it is unstable under the condition of" self-weight + surface load + rainfall once in 20 years ". So the factors of safety of these conditions are not enough and the landslide needs to be taken some engineering measures.
Taking Yanwan bridge landslide in Badong county as the example,the deformation characteristics was used to analyze the mechanism of the landslide. Then the stability of the landslide under different work conditions was calculated. The results indicate that the landslide is basically stable under the condition of" self-weight + surface load "and it is unstable under the condition of" self-weight + surface load + rainfall once in 20 years ". So the factors of safety of these conditions are not enough and the landslide needs to be taken some engineering measures.
引文
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[2]王春燕,王力.灰色关联的模糊综合评价法在三峡库区巴东段滑坡危险性评价中的应用[J].水电能源科学,2019(4):131-135.
[3]Tang,H.,Li,C.,Hu,X.,et al.Evolution characteristic of the Huangtupo landslide based on in situ tunneling and monitoring[J].Landslides,2015,12(3):511-521.
[4]Su,G.,Zheng,H.,Tang,H.,et al.Huangtupo landslide stability under water level fluctuations of the Three Gorges reservoir[J].Landslides,2016,13(5):1167-1169.
[5]樊晓一.滑坡位移多重分形特征与滑坡演化预测[J].岩土力学,2011(6):1831-1837.
[6]柴波,殷坤龙,肖拥军.巴东新城区库岸斜坡软弱带特征[J].岩土力学,2010(8):2501-2506.
[7]Li D.,Yin,K.,Chin,L.Analysis of Baishuihe landslide influenced by the effects of reservoir water and rainfall[J].Environmental earth sciences,2010,60(4):677-687.
[8]郭子正,殷坤龙,唐扬,等.库水位下降及降雨作用下麻柳林滑坡稳定性评价与预测[J].地质科技情报,2017,36(4):260-265.
[9]易庆林,覃世磊,文凯,等.三峡库区三门洞滑坡变形特征与影响因素分析[J].三峡大学学报(自然科学版),2018(5):41-46.
[10]尹晓萌,晏鄂川,杜毅,等.库水位下降条件下堆积层滑坡稳定性分析[J].中国地质灾害与防治学报,2017(3):8-15.
[11]Xia,M.,Ren,G.,Ma,X..Deformation and mechanism of landslide influenced by the effects of reservoir water and rainfall[J].Three Gorges,China.Natural Hazards,2013(68):467-482.