摘要
库水位升降条件下均质土坝渗流特征及稳定性分析研究对于水库运行管理及防洪蓄水、排水灌溉等具有重要现实意义。通过对某均质土坝在库水位上升、下降条件下研究,得到了坝体渗流和坝坡稳定性变化规律。结果表明:库水位上升速率越慢,坝体不同位置孔隙水压力终值越大,影响深度越大,渗流作用效果更加明显,而库水位下降速率越慢,不同位置孔隙水压力终值越小,且距坝坡面越近,孔隙水压力越小。在库水位上升过程中,坝坡安全系数是逐渐增加的,而在库水位下降过程中,坝坡安全系数是逐渐减小的。
The analysis and research on seepage characteristics and stability of homogeneous earth dams under the condition of reservoir water level fluctuation has important practical significance for reservoir operation management,flood control,water storage,drainage and irrigation.Through the study of a homogeneous earth dam under the condition of rising and falling reservoir water level,the law of dam seepage and dam slope stability variation is obtained.The results show that:the slower the reservoir water level rises,the greater the final value of pore water pressure at different positions of the dam body,the greater the depth of influence,and the more obvious effect of seepage,while the slower the reservoir water level declines,the smaller the final value of pore water pressure at different positions,and the closer to the dam slope,the smaller the pore water pressure.When the reservoir water level rises,the dam slope safety factor increases gradually,while when the reservoir water level drops,the dam slope safety factor gradually decreases.
作者
姚建新
姚丹
史箫笛
程梦武
况丽
Yao Jianxin;Yao Dan;Shi Xiaodi;Cheng Mengwu;Kuang Li(The Eighth Geological Team of Hubei Geological Bureau,Xiangyang Hubei 441000,China)
出处
《山西建筑》
2023年第22期189-192,共4页
Shanxi Architecture
关键词
土坝
库水位
渗流
稳定性
earth dam
reservoir water level
seepage
stability
