• 首 页期刊简介编 委 会规章制度作者指南审稿流程联系我们
期刊封面
郭敏,苏生瑞,曾金.降雨条件下堆积层滑坡变形特征及形成机理研究[J].河北工程大学自然版,2019,36(3):39-45
降雨条件下堆积层滑坡变形特征及形成机理研究
Deformation Characteristics and Formation Mechanism of Accumulated Landslides Under Rainfall Conditions
投稿时间:2019-07-01  
DOI:10.3969/j.issn.1673-9469.2019.03.008
中文关键词:  滑坡  堆积层滑坡  物理模型  数值模拟  渗流
英文关键词:landslides  accumulation landslide  physical model  numerical simulation  seepage
基金项目:国家自然科学基金资助项目(4167020392)
作者单位
郭敏 长安大学 地质工程与测绘学院, 陕西 西安 710054 
苏生瑞 长安大学 地质工程与测绘学院, 陕西 西安 710054 
曾金 长安大学 地质工程与测绘学院, 陕西 西安 710054
中铁第一勘察设计院集团有限公司, 陕西 西安 710054 
摘要点击次数: 41
全文下载次数: 25
中文摘要:
      以陕西省岚皋县广泛发育的堆积层滑坡为研究对象,借助土工试验、物理模拟和数值模拟手段,揭示了降雨条件下滑坡的变形和渗透规律,研究了降雨诱发堆积层滑坡的变形破坏特征及形成机理。物理模型试验表明:堆积层斜坡内渗流速率与时间呈幂函数关系,关系式为y=6.65883x-0.900 34;在降雨和地下水位变动下,堆积层滑坡主要表现为牵引式,其发展过程可概括为:裂缝的产生→裂缝的扩展→裂缝的贯通→次级滑动→整体滑动五个阶段;堆积层滑坡的二元结构是该滑坡形成的决定性因素,降雨入渗导致地下水在基岩面附近富集是该滑坡发生的重要诱发因素。数值模拟结果表明:随着地下水作用时间的持续,坡体稳定性逐渐降低,剪应变逐渐增大,斜坡变形逐渐增加。
英文摘要:
      This paper takes the developed landslide in Langao County of Shaanxi Province as the research object with the help of geotechnical experiments,physical simulation and numerical simulation,reveals the deformation and infiltration law of landslide under rainfall conditions,and studies the deformation and failure characteristics and formation mechanism of rainfall-induced accumulation landslide. The physical model test shows that:The relationship between seepage rate and time is exponential,and the relationship is y=6.658 83x-0.900 34;With the rainfall and changes of groundwater level,the accumulation of landslides is mainly characterized by traction whose development process can be summarized as follows:the generation of cracks→ the expansion of cracks→ the penetration of cracks→ secondary sliding→ overall sliding five stages;It is found that the binary structure of the landslide is the decisive factor in the formation of the landslide. The rainfall infiltration leads to the enrichment of the water flow near the bedrock surface,which is an important predisposing factor for the landslide.Numerical simulation results show that the slope stability decreases with the duration of groundwater,and the shear strain and the slope deformation increase gradually.
  查看/发表评论  下载PDF阅读器  下载全文
关闭