| 滑面驱动下坡积体渐进变形及其启动数值解析 |
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| 引用本文： | 韩利彪,周成,何宁,何建村,吴艳.滑面驱动下坡积体渐进变形及其启动数值解析[J].地下空间与工程学报,2014,10(6):1342-1347. |
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| 作者姓名： | 韩利彪 周成 何宁 何建村 吴艳 |
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| 作者单位： | 1. 四川大学水力学与山区河流开发保护国家重点实验室、水利水电学院,成都 610065;2. 水利部土石坝破坏机理与防控技术重点实验室、南京水利科学研究院,南京 210024;3. 新疆水利水电科学研究院,乌鲁木齐 830049 |
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| 基金项目： | 水利部公益性行业科研专项项目(201301022,201201037);国家自然科学基金重大研究计划集成项目(91215301);水利部土石坝破坏机理与防控技术重点实验室开放基金(YK913002);江苏省交通运输科学研究计划项目(2011Z01-1);国家自然科学青年基金项目(51009097) |
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| 摘 要： | 考虑地下水和坡积体-稳定坡体接触面附近土体的应变软化,在Bingham模型的基础上研究滑动接触面对坡积体渐进变形及滑坡启动运动规律的影响,得到了坡积体渐进变形和滑坡启动的解析解。结果表明:坡积体存在着随深度呈幂函数形式分布的变形场或速度场,且在接触面附近剪切速率最大;当接触面附近土体渐进变形达到阈值时,应变软化导致力学参数降低,发生渐进破坏,坡积体由渐进变形过渡到滑坡启动阶段。将模型计算值与某滑坡实测位移值比较,得到较好的模拟结果。
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| 关 键 词： | 坡积体 渐进变形 Bingham模型 蠕变 应变软化 残余强度 |
| 收稿时间： | 2014-08-19 |
Analytical Solution on Progressive Deformation and Initiation of Landslide from the Sliding Interface |
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| Han Libiao,Zhou Cheng,He Ning,He Jiancun,Wu Yan.Analytical Solution on Progressive Deformation and Initiation of Landslide from the Sliding Interface[J].Chinese Journal of Underground Space and Engineering,2014,10(6):1342-1347. |
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| Authors: | Han Libiao Zhou Cheng He Ning He Jiancun Wu Yan |
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| Affiliation: | 1.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University,Chengdu 610065, China;2.Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dam of the Ministry of Water Resources, Nanjing Hydraulic Research Institute, Nanjing 210024.China;3. Xinjiang Hydraulic and Hydropower Research Institute, Urumqi 830049.China |
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| Abstract: | To analyze the progressive deformation and initiation of talus slide, the underground water and strain softening of soil near the interface were mainly considered in this paper. Based on the Bingham model, analytical solution of slope progressive deformation and initiation of talus slide were obtained. The result showed that the velocity field of the talus body along the depth was in a power function profile and the maximum shearing rate was near the interface. In addition, the initiation of talus slide was induced by the reduction of the soil strength when the strain near the interface reached a threshold value. In comparison with the in-situ data, the calculated results based on the proposed model were reasonable. |
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| Keywords: | talus body progressive deformation Bingham model creep deformation strain softening residual strength |
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