库水位下降作用下动水压力型滑坡数值模拟
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摘要
本文利用Geo-Studio软件对库水位作用下BZM滑坡的渗流场及稳定性进行了模拟分析。分析结果表明:①BZM滑坡中前部地下水位受库水位变动的影响较大,库水位的波动会直接影响地下水位的波动,且地下水位有延迟效应。地下水位线随库水位下降时,其呈现直线递增的趋势,且增大的速率先快后慢。②库水位波动对BZM滑坡稳定系数有较大影响,具体为:库水位下降时,BZM滑坡稳定系数也会逐减小,表现出典型的动水压力型滑坡特征。库水位下降速率大时,稳定系数下降速率相对较大。
This paper uses Geo-Studio software to simulate the seepage field and stability of BZM landslide under reservoir water level.The analysis results show that:①the front groundwater level in the BZM landslide is greatly affected by the fluctuation of the reservoir water level. The fluctuation of the reservoir water level will directly affect the fluctuation of the groundwater level, and the groundwater level has a delay effect. When the groundwater level line decreases with the reservoir water level, it tends to increase linearly, and the rate of increase is faster and slower.② Reservoir water level fluctuation has a great influence on the stability coefficient of BZM landslide. Specifically,when the reservoir water level decreases, the stability coefficient of BZM landslide will also decrease, showing the characteristics of typical hydrodynamic pressure landslide. When the reservoir water level decline rate is large, the rate of decline of the stability coefficient is relatively large.
This paper uses Geo-Studio software to simulate the seepage field and stability of BZM landslide under reservoir water level.The analysis results show that:①the front groundwater level in the BZM landslide is greatly affected by the fluctuation of the reservoir water level. The fluctuation of the reservoir water level will directly affect the fluctuation of the groundwater level, and the groundwater level has a delay effect. When the groundwater level line decreases with the reservoir water level, it tends to increase linearly, and the rate of increase is faster and slower.② Reservoir water level fluctuation has a great influence on the stability coefficient of BZM landslide. Specifically,when the reservoir water level decreases, the stability coefficient of BZM landslide will also decrease, showing the characteristics of typical hydrodynamic pressure landslide. When the reservoir water level decline rate is large, the rate of decline of the stability coefficient is relatively large.
引文
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[5]胡修文,唐辉明,刘佑荣.三峡库区赵树岭滑坡稳定性物理模拟试验研究[J].岩石力学与工程学报,2005(12):2089-2095.
[6]王锦国,周云,黄勇.三峡库区猴子石滑坡地下水动力场分析[J].岩石力学与工程学报,2006(S1):2757-2762.
[7]帅红岩,陈少平,韩文喜.库水位下降对三峡库区滑坡稳定性的影响研究[J].资源环境与工程,2013,27(02):170-174.
[8]刘贵应.库水位变化对三峡库区堆积层滑坡稳定性的影响[J].安全与环境工程,2011,18(05):26-28,32.
[9]肖诗荣,胡志宇,卢树盛,等.三峡库区水库复活型滑坡分类[J].长江科学院院报,2013,30(11):39-44.
[2]魏学勇,欧阳祖熙,董东林,等.库水位涨落条件下滑坡渗流场特征及稳定性分析[J].地质科技情报,2011,30(06):128-132.
[3]周廷强,刘学飞.动水位对库区边坡稳定影响机理分析[J].西部探矿工程,2008(12):54-56.
[4]曹伟.论库水位变化对土质滑坡稳定性的影响[J].山西师范大学学报(自然科学版),2017,31(04):123-128.
[5]胡修文,唐辉明,刘佑荣.三峡库区赵树岭滑坡稳定性物理模拟试验研究[J].岩石力学与工程学报,2005(12):2089-2095.
[6]王锦国,周云,黄勇.三峡库区猴子石滑坡地下水动力场分析[J].岩石力学与工程学报,2006(S1):2757-2762.
[7]帅红岩,陈少平,韩文喜.库水位下降对三峡库区滑坡稳定性的影响研究[J].资源环境与工程,2013,27(02):170-174.
[8]刘贵应.库水位变化对三峡库区堆积层滑坡稳定性的影响[J].安全与环境工程,2011,18(05):26-28,32.
[9]肖诗荣,胡志宇,卢树盛,等.三峡库区水库复活型滑坡分类[J].长江科学院院报,2013,30(11):39-44.