库水位升降作用下铅厂沟滑坡稳定性研究
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摘要
以云南观音岩水电站右岸铅厂沟滑坡为例,在现场地质调查的基础上,通过室内试验和反演的方法确定滑坡岩土体物理力学参数,运用Geo-Studio计算滑坡体在不同工况下的安全系数。结果表明,在原河床水位下,铅厂沟滑坡体稳定性较好。水库蓄水后,随着库水位升高,铅厂沟滑坡体稳定性会降低。当库水位骤降时,坡体稳定性亦会略微下降。若遇暴雨或地震等恶劣状况,坡体稳定性会大幅度降低。对此提出了削坡减载的治理措施,并对治理后的边坡进行稳定性分析。结果表明,经削坡治理后,坡体稳定性有较大提高,满足相应的安全储备要求。
Stability of the Qianchanggou landslide mass on the right bank of the Guanyinyan hydropower station in Yunnan province is analyzed. Physical and mechanical parameters of the rock and soil in the landslide mass are determined through in-situ geological investigation,laboratory experiments and back calculation. Geo-Studio software is adopted to calculate the safety factors of the slope under different conditions. Results show that the Qianchanggou landslide slope is stable in the original riverbed water level condition. After impoundment of the reservoir,stability of the slope reduces with the water level rises. When the water level drops suddenly,the stability of the slope will decline slightly. While under extreme adverse conditions such as a storm or earthquake,the slope stability will be greatly reduced. Then,a treatment measure of slope cutting is proposed. It shows that the stability of the slope improves greatly after the cutting and meets the safety requirement.
Stability of the Qianchanggou landslide mass on the right bank of the Guanyinyan hydropower station in Yunnan province is analyzed. Physical and mechanical parameters of the rock and soil in the landslide mass are determined through in-situ geological investigation,laboratory experiments and back calculation. Geo-Studio software is adopted to calculate the safety factors of the slope under different conditions. Results show that the Qianchanggou landslide slope is stable in the original riverbed water level condition. After impoundment of the reservoir,stability of the slope reduces with the water level rises. When the water level drops suddenly,the stability of the slope will decline slightly. While under extreme adverse conditions such as a storm or earthquake,the slope stability will be greatly reduced. Then,a treatment measure of slope cutting is proposed. It shows that the stability of the slope improves greatly after the cutting and meets the safety requirement.
引文
[1]邓宏艳.大型水电工程区库岸滑坡形成机理与水作用影响研究[D].成都:西南交通大学,2011
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[3]艾子欣.观音岩水电站铅厂滑坡稳定性分析[D].长沙:长沙理工大学,2011
[4]赵代鹏,王世梅,谈云志,等.库水升降作用下浮托减重型滑坡稳定性研究[J].岩土力学,2013,34(4):1017-1024
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[6]吴琼,唐辉明,王亮清,等.库水位升降联合降雨作用下库岸边坡中的浸润线研究[J].岩土力学,2009,30(10):3025-3031
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[8]王学武,冯学钢,王维早.库水位升降作用对库岸滑坡稳定性的影响研究[J].水土保持研究,2006,13(5):232-234
[9]汪斌.库水作用下滑坡流固耦合作用及变形研究[D].武汉:中国地质大学,2007
[10]朱大鹏.三峡库区典型堆积层滑坡复活机理及变形预测研究[D].武汉:中国地质大学,2010
[11]梁学战.三峡库区水位升降作用下岸坡破坏机制研究[D].重庆:重庆交通大学,2013
[2]韩梅.观音岩水电站铅厂沟滑坡滑带参数反演分析[J].现代矿业,2009(4):50-52
[3]艾子欣.观音岩水电站铅厂滑坡稳定性分析[D].长沙:长沙理工大学,2011
[4]赵代鹏,王世梅,谈云志,等.库水升降作用下浮托减重型滑坡稳定性研究[J].岩土力学,2013,34(4):1017-1024
[5]廖彬,张文斌.库水位变化条件下滑坡稳定性研究——以雅砻江某水电站虎山滩滑坡为例[J].人民长江,2013,44(9):37-40
[6]吴琼,唐辉明,王亮清,等.库水位升降联合降雨作用下库岸边坡中的浸润线研究[J].岩土力学,2009,30(10):3025-3031
[7]梁学战,陈洪凯.库水位升降条件下不同渗透性的滑坡体稳定性变化规律[J].中国地质灾害与防治学报,2012,23(4):20-26
[8]王学武,冯学钢,王维早.库水位升降作用对库岸滑坡稳定性的影响研究[J].水土保持研究,2006,13(5):232-234
[9]汪斌.库水作用下滑坡流固耦合作用及变形研究[D].武汉:中国地质大学,2007
[10]朱大鹏.三峡库区典型堆积层滑坡复活机理及变形预测研究[D].武汉:中国地质大学,2010
[11]梁学战.三峡库区水位升降作用下岸坡破坏机制研究[D].重庆:重庆交通大学,2013
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