平推式滑坡中承压水的敏感性研究

发布时间：2018-07-10 13:57

本文选题：平推式滑坡 + 渗流　；参考：《工程地质学报》2017年02期

【摘要】：研究平推式滑坡中承压水的作用范围,有利于准确评价斜坡稳定性,对平推式滑坡的成灾机理研究和灾害防治具有较好的指导意义。平推式滑坡中岩层倾角α较小,在承压水作用范围分析时通常忽略了岩层倾角的影响。基于地下水向河渠运动相关理论,考虑岩层倾角,建立平推式滑坡地下水渗流分析模型,推导出承压水作用范围L_1新的计算公式,详细计算分析了不同透水层参数下L_1对α的敏感性,并提出了敏感倾角的概念。计算结果表明,α对L_1影响显著,这种影响程度与透水层厚度、渗流量、以及渗透系数密切相关,透水层厚度越大,α对L_1的影响越显著;同时敏感倾角受透水层厚度、渗流量、渗透系数等参数影响。最后应用新模型分析滑坡实例,验证了新模型的合理性。
[Abstract]:It is helpful to evaluate the slope stability accurately by studying the action range of confined water in the flat slide, and it has a good guiding significance for the study of the mechanism of disaster formation and the disaster prevention and control of the flat push landslide. The inclined angle of rock stratum is small in the flat push landslide, and the influence of the dip angle of rock stratum is usually neglected in the analysis of the range of action of confined water. Based on the theory of groundwater movement to river channel and considering the inclination of rock strata, a model of groundwater seepage analysis for horizontal landslide is established, and a new formula L _ 1 for calculating the action range of confined water is derived. The sensitivity of L _ 1 to 伪 under different permeable layer parameters is calculated and analyzed in detail, and the concept of sensitive dip angle is proposed. The results show that 伪 has a significant effect on L _ 1, which is closely related to the thickness of permeable layer, seepage flow and permeability coefficient. The greater the thickness of permeable layer, the more significant the effect of 伪 on L-1, and the more sensitive inclination angle is to the thickness of permeable layer, the more permeable flow is. Permeability coefficient and other parameters. Finally, the rationality of the new model is verified by using the new model to analyze the landslide.
【作者单位】：成都理工大学环境与土木工程学院;地质灾害防治与地质环境保护国家重点实验室(成都理工大学);宜宾学院;
【基金】：国家自然科学基金重点项目(41130745) 国家基础研究计划(973计划)项目(2013CB733202) 四川省青年科技创新研究团队(2015TD0030)资助
【分类号】：P642.22

【相似文献】