摘要
为研究在库水位和降雨联合作用下某边坡体的渗透特性及相应的稳定性,根据非饱和渗流原理,利用有限元软件Geo-slope模拟了某边坡体在降雨和库水位骤降工况下的孔压变化及安全系数变化规律。结果表明,库水位下降速率越大,孔压变化越大,最小安全系数越小;静库水位越高,边坡体下部孔压越大,安全系数越低;降雨发生在库水位下降开始时刻对于上部浅层边坡和深层边坡来说较为危险,而降雨发生在库水位下降结束时刻对于下部浅层边坡来说较为危险;边坡的失稳先发生于边坡体的下部浅层,然后引起深层的整体滑动。研究结果为边坡工程治理提供了理论依据。
In order to study the seepage characteristics and the corresponding stability of a slope under the combined action of reservoir water level and rainfall, according to the principle of unsaturated seepage, the finite element software Oeo-slope was used to simulate the variation of pore pressure and safety factor of a slope under the condition of rainfall and sudden drop of reservoir water level. The calculation results show that the larger the water level drop rate is, the greater the pore pressure changes, and the smaller the minimum safety factor is. The higher the water level of the static reservoir is, the greater the pore pressure in the lower part of the slope is, and the lower the safety factor is; The more dangerous the rainfall is for the upper shallow slope and the deep slope at the beginning of the water level drop, while the rainfall occurs at the end of the reservoir water level decline, The instability of the slope occurs first in the lower shallow layer of the slope and then causes the deep whole sliding. The results provide theoretical basis for slope engineering treat- ment.
作者
张珂峰
ZHANG Ke-feng(Nantong Open University Institute of Architectural Engineering,Nantong 226000,China)
出处
《水电能源科学》
北大核心
2018年第11期139-143,共5页
Water Resources and Power
基金
国家自然科学基金项目(61503201)
关键词
库水位骤降
降雨
深层滑动
浅层滑动
渗流特性
稳定性分析
sudden drop of reservoir water level
rainfall
deep sliding
shallow sliding
seepage characteristics
stability analysis
