[1]周四保,孟颂颂,华兴林,等.某滑坡滑带土的多级剪切试验及分析[J].江苏水利,2023,(05):30-34.
ZHOU Sibao,MENG Songsong,HUA Xinglin,et al.Study of soil shear test on a landslide slip zone[J].JIANGSU WATER RESOURCES,2023,(05):30-34.
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某滑坡滑带土的多级剪切试验及分析()
《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]
- 卷:
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- 期数:
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2023年05期
- 页码:
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30-34
- 栏目:
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水利工程建设
- 出版日期:
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2023-05-30
文章信息/Info
- Title:
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Study of soil shear test on a landslide slip zone
- 文章编号:
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1007-7839(2023)05-0030-0005
- 作者:
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周四保1; 孟颂颂2; 华兴林2; 钱招3
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(1. 当涂县水利局,安徽 马鞍山 243100;2. 南京市水利规划设计院股份有限公司,江苏 南京 210014;3. 中国地质大学(武汉)工程学院,湖北 武汉 430074)
- Author(s):
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ZHOU Sibao1; MENG Songsong2; HUA Xinglin2; Qian Zhao3
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(1. Dangtu County Water Conservancy Bureau, Dangtu 243100, China;2. Nanjing Water Conservancy Planning and Design Institute Co., Ltd., Nanjing 210014, China;3. Faculty of Engineering, China University of Geosciences(Wuhan), Wuhan 430074, China)
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- 关键词:
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滑带土; 环剪试验; 剪切速率; 残余摩擦系数; 法向应力
- Keywords:
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slip soil; ring shear test; shear rate; residual friction coefficien; normal stress
- 分类号:
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TV41
- 文献标志码:
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B
- 摘要:
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滑带土的强度特性对于研究滑坡形成机制具有重要意义。通过一系列多级环剪试验研究不同剪切速率下滑带土的强度特性。研究发现:剪切速率对土体残余摩擦系数影响较小,而剪切时的有效法向应力对土体残余摩擦系数影响较大,有效法向应力越小,残余摩擦系数越大,可能是与剪切面的发育程度有关;土体的轴向位移在初始剪切阶段受剪切速率影响较大,随着有效法向应力的增大,轴向位移变化趋势趋于相似;试验完成后测定滑带土含水量变化,发现剪切完成后滑带处含水率与土体的塑性指数大致相等。
- Abstract:
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The strength characteristic of slip zone soil is of great significance to study the formation mechanism of landslide. A series of multistage ring shear tests were carried out to study the strength characteristics of soil in sliding zone with different shear rates. It was found that the shear rate has a small effect on the residual friction coefficient of the soil, while the effective normal stress in shear has a large effect on the residual friction coefficient of the soil, and the smaller the effective normal stress the larger the residual friction coefficient, probably related to the degree of development of the shear plane; The axial displacement of soil is greatly affected by the shear rate in the initial shear stage, and the variation trend of axial displacement tends to be similar with the increase of the effective normal stress. After the test, the water content of slip soil was measured. It was found that the water content of slip zone was roughly equal to the plastic index of soil.
参考文献/References:
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[11]赵帆程,苗发盛,吴益平,等. 不同环剪条件下三峡库区童家坪滑坡滑带土强度特性[J]. 地质科技通报,2022,41(2):315-324.
备注/Memo
- 备注/Memo:
-
收稿日期:2022-12-24
作者简介:周四保(1973—),男,工程师,本科,主要从事水利工程建设与管理工作。E-mail:dtcjhdj.z@163.com
更新日期/Last Update:
2023-05-30