中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2019, Vol. 38 ›› Issue (05): 80-85.DOI: 10.3969/j.issn.1674-0696.2019.05.14

• 港口航道·水利水电·资源环境 • 上一篇    下一篇

基于水平应变监测信息的边坡稳定性评价研究

唐胜传1,黄诗渊2,周泳峰2   

  1. (1.招商局重庆交通科研设计院有限公司 山区道路工程与防灾减灾技术国家地方联合工程实验室, 重庆 400067; 2. 重庆交通大学 水利水运工程教育部重点实验室,重庆 400074)
  • 收稿日期:2018-03-21 修回日期:2018-12-10 出版日期:2019-05-15 发布日期:2019-05-15
  • 作者简介:唐胜传(1975—),男,浙江建德人,研究员,博士,主要从事路基、岩土、边坡工程方面的研究。E-mai:tangshengchuan@cmhk.com。 通信作者:黄诗渊(1991—),男,江西赣州人,博士研究生,主要从事黏土材料抗裂性能方面的研究。E-mai:cqjtdxhsy@163.com。
  • 基金资助:
    重庆市研究生教育创新基金项目(CYB17126、CYS18218);重庆交通大学河海学院研究生教育创新基金项目(YC2018010);国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金(SLK2018B07)

Slope Stability Evaluation Based on Monitoring Information of Horizontal Strain

TANG Shengchuan1, HUANG Shiyuan2, ZHOU Yongfeng2   

  1. (1. Laboratory of National Local Joint Project of Mountain Area Road Engineering, Disaster Prevention and Mitigation Technology, China Merchants Chongqing Communications Research & Design Co. Ltd., Chongqing 400067, P. R. China; 2. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, P. R. China)
  • Received:2018-03-21 Revised:2018-12-10 Online:2019-05-15 Published:2019-05-15

摘要: 基于有限元法,建立了3个不同坡顶距的边坡数值模型,通过在条形基础上施加逐渐增加的附加荷载,得到了边坡的位移、应变响应,探讨了边坡的破坏形式,分析了边坡不同高程处测线最大水平应变与边坡稳定性系数的关系。研究表明:随着基础荷载的逐渐增加,土体的水平应变也逐渐增加,但最大水平应变和最大水平位移出现位置并非出现于滑动面上,但通过水平应变分布可以观察土体的局部应力状态;边坡稳定性系数与测线最大水平应变之间存在一定的拟合关系,当坡顶距较小时,可采用对数函数或幂函数进行拟合,当坡顶距较大时,可用线性函数进行拟合;综合比较不同坡顶距的边坡模型中不同测线最大水平应变与稳定性系数的相关系数,发现最佳监测区域在边坡的中上部。

关键词: 岩土工程, 条形基础, 边坡, 水平应变, 监测, 稳定性系数

Abstract: Based on the finite element method, 3 numerical models of slopes with different top slope spacing were established. By applying gradually increasing additional loads on the strip footing, displacement and strain responses of the slope were obtained. The failure forms of the slopes were discussed. The relationship between the maximum horizontal strain of the measuring line at different elevations of the slope and the slope stability coefficient was analyzed. Results show that with the gradual increase of base load, the soil horizontal strain also increases gradually; but the maximum horizontal strain and displacement do not appear on the sliding surface. However, the local stress state of soil can be observed by horizontal strain distribution. There is a certain fitting relationship between the slope stability coefficient and the maximum horizontal strain of the measuring line. When the top slope spacing is small, it can be fitted by logarithmic function or power function; when the top slope spacing is large, it can be fitted by linear function. Comparing the correlation coefficients between the maximum horizontal strain and the stability coefficient of different measuring lines in slope models with different top slope spacing, it is found that the best monitoring area is in the middle and upper part of the slope.

Key words: geotechnical engineering, strip footing, slope, horizontal strain, monitoring, stability coefficient

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