摘要
后缘加载和前缘开挖对坡体的稳定性会产生不利的影响,而对于在边坡后缘开挖形成蓄水系统的工程活动,需要综合评价对边坡稳定性的影响。论文将饱和非饱和二维渗流场连续性方程和应力场平衡方程相结合,建立流-固耦合计算模型,分别计算了边坡后缘蓄水系统开挖和蓄水系统内水位变化及可能由于其不同蓄水高度下产生的渗漏导致后缘坡体内地下水水位升高等各种工况的边坡稳定性系数。计算结果表明:坡体稳定性与蓄水系统的开挖和蓄水高度均有一定的关系,但对稳定性系数的影响相对较小,而蓄水系统的渗漏会明显降低坡体的稳定性。因此可以考虑通过控制蓄水系统内水位高度及对其进行防渗处理,降低坡体后缘蓄水系统对边坡稳定性带来的不利影响。
The loading of the trailing edge and the excavation of the leading edge will adversely affect the stability of the slope.For the engineering activities of excavation at the trailing edge of the slope to form a water storage system,a comprehensive assessment of the impact on the stability of the slope is required.This paper combines the saturated and unsaturated two-dimensional seepage field continuity equation and the stress field balance equation to establish a fluid-solid coupling calculation model.The slope water storage system excavation and the water level changes in the water storage system at the trailing edge of the slope are calculated.The leakage caused by the different storage heights results in slope stability coefficients of various working conditions such as the increase of groundwater level in the slope of the trailing edge.The calculation results show that the slope stability has a certain relationship with the excavation and storage height of the water storage system,but the impact on the stability coefficient is relatively small,and the leakage of the water storage system will significantly reduce the stability of the slope stability.Therefore,by controlling the height of the water level in the water storage system and anti-seepage treatment,it can be considered to reduce the adverse effect of the slope water storage system on the slope stability.
作者
徐浩伦
韩旭
孙红月
XU Haolun;HAN Xu;SUN Hongyue(College of Ocean,Zhejiang University,Zhoushan 316021,China)
出处
《自然灾害学报》
CSCD
北大核心
2020年第5期202-208,共7页
Journal of Natural Disasters
基金
国家自然科学基金项目(41772276)
浙江省重点研发项目(2017C03006)。
关键词
后缘加载
水位变化
渗流场
稳定性
数值模拟
trailing edge loading
water level change
seepage field
stability
numerical simulation
