| 持续降雨条件下黄土边坡稳定性试验研究 |
| 马蓓青1; 杜玉鹏3; 王怀星1; 杨傲秋2; 王晓东2
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| 2021
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发表期刊 | 水土保持学报
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卷号 | 35期号:5页码:50-56 |
摘要 | 滑坡是黄土丘陵沟壑区常见的重力侵蚀,降雨是黄土边坡失稳的主要诱因。为了研究持续降雨条件
下黄土边坡的稳定性,采用人工降雨装置进行室外现场试验,测量土体含水率、密度、滑坡剪切带位置以及
裂缝的发育等情况,并使用 FLAC3D 软件计算模拟持续降雨条件下裂缝发育对边坡稳定性的影响。结果
表明:随着降雨历时的增加,黄土边坡土体的含水率逐渐增大,土体强度降低,而且自重增大,坡面冲蚀沟
逐渐发育,坡脚出现滑塌,坡顶出现拉裂缝,裂缝加剧了降雨的集中入渗,使得裂缝周边土体强度快速降
低,最终导致在降雨历时至 308. 8h 时发生滑坡,持续降雨和裂缝引起的集中入渗加速了土体强度的降低,
导致了滑坡,裂缝发育得越深、数量越多,对边坡稳定性危害越大。研究结果为降雨条件下的黄土边坡稳
定分析研究和地质灾害防治提供方法和技术支撑。 |
其他摘要 | Landslide is the common geological disaster in loess hilly and gully areas , and rainfall is the main
cause of instability of loess slopes.In order to study
the stability of loess slopes under continuous rainfall
conditions , an artificial rainfall device was used to carry out experimental studies on the outdoor site.The soil
moisture content , density , shear zone location and crack development were measured.The FLAC3Dgeotech -
nical engineering numerical calculation software was used to analyze the slope stability.The results showed
that with the increase of rainfall duration , the moisture content of the loess slope soil gradually increased ,
the soil strength gradually decreased , and its own weight gradually
increased.The gully erosion on the slope
gradually developed , the slope toe collapsed , and the tensile cracks occurred on the top
of the slope.The
cracks increased the infiltration of rainfall , which made the strength of soil around the crack decrease rapid -
ly
, and finally
caused a landslide when the rainfall lasted 308. 8h.Rainfall infiltration and concentrated infil -
tration caused by cracks accelerated the reduction of soil strength and led to the landslide.The deeper and
more cracks developed , the greater their damage to slope stability. |
关键词 | 滑坡
持续降雨
边坡稳定性
数值计算分析
裂缝
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收录类别 | 中文核心期刊要目总览
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语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/10380
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.中国科学院水利部水土保持研究所 2.西北农林科技大学水土保持研究所 3.西北农林科技大学水利与建筑工程学院
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第一作者单位 | 中国科学院水利部水土保持研究所
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推荐引用方式 GB/T 7714 |
马蓓青,杜玉鹏,王怀星,等. 持续降雨条件下黄土边坡稳定性试验研究[J]. 水土保持学报,2021,35(5):50-56.
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APA |
马蓓青,杜玉鹏,王怀星,杨傲秋,&王晓东.(2021).持续降雨条件下黄土边坡稳定性试验研究.水土保持学报,35(5),50-56.
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MLA |
马蓓青,et al."持续降雨条件下黄土边坡稳定性试验研究".水土保持学报 35.5(2021):50-56.
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文件名:
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持续降雨条件下黄土边坡稳定性试验研究_马蓓青.pdf
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Adobe PDF
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