地下水位对雾江滑坡体稳定性的影响

发布时间：2018-04-16 22:11

本文选题：地下水位线 + 安全系数　；参考：《长江科学院院报》2017年01期

【摘要】：边坡稳定安全系数受多方面因素的影响,其中地下水位线的不同处理方式对边坡稳定的影响较大。由于实际工程问题的复杂性,一般需要基于某种假定获得新的地下水位线。基于极限平衡理论,结合雾江滑坡体工程,对比分析2种地下水位线处理方式对安全系数的影响,同时探讨了不同水位下的的临界地下水位。分析表明:假定库水位与原始地下水位水平直接相连,古滑带安全系数随着水位上升呈现先缓慢增加后逐渐减小的趋势;而假定考虑滑坡体内地下水位变化,古滑带安全系数随着蓄水位的上升呈现逐渐减小的趋势,即考虑库水位引起地下水位变化后,安全系数有一定的降低,安全系数偏于保守;并且不同库水位都存在一个临界地下水位比例系数,且比例系数位于0~1之间。
[Abstract]:The safety factor of slope stability is affected by many factors, among which different treatment methods of underground water level have great influence on slope stability.Due to the complexity of practical engineering problems, it is generally necessary to obtain new underground water level based on some assumption.Based on the limit equilibrium theory and the Wujiang landslide engineering, the influence of two treatment methods of underground water level on the safety factor is comparatively analyzed, and the critical groundwater level under different water levels is discussed.The analysis shows that if the reservoir water level is directly connected with the original groundwater level, the safety factor of the paleo-slip zone increases slowly first and then decreases gradually with the water level rising, while the groundwater level variation in the landslide is assumed to be considered.The safety factor of paleo-slip zone decreases gradually with the increase of water level, that is, considering the change of groundwater level caused by reservoir water level, the safety factor decreases to a certain extent, and the safety factor is conservative.Moreover, there exists a critical groundwater level ratio coefficient in different reservoir water levels, and the proportional coefficient is between 0 and 1.
【作者单位】：三峡大学水利与环境学院;黄河上游水电开发有限责任公司大坝管理中心;中国科学院武汉岩土力学研究所;湖南涔天河工程建设投资有限责任公司;
【基金】：国家自然科学基金项目(51209124)
【分类号】：P642.22;P641

【相似文献】