Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41401087 |
| 动、静荷载下孔压对饱和高温冻土力学性质影响机理 | |
| 张虎 | |
| 主持机构 | 中国科学院寒区旱区环境与工程研究所 |
| 开始日期 | 2015 |
| 结束日期 | 2017 |
| 资助经费 | 250000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | When subjected to an external load, the pore water pressure develops in the saturated warm frozen soil. Accordingly the pore water pressure variation influences the effective stress of the soil in the meantime which results in the change of the mechanical property. Then, a series of engineering problems are prompted to appear. In addition, the change laws of the pore water pressure as well as the mechanical response of warm frozen soil are significantly affected by the load types. In order to research the influence of the pore water pressure on the mechanical behavior of warm frozen soil under different kinds of loadings, the pore water pressure tests with saturated warm frozen soil will be carried out in this paper, under the static and dynamic loadings, using the Qingzang silty clay as the research object. The pore water pressure curves in the different temperature conditions and different drainage conditions will be compared. Then, the relationship between the pore water pressure dissipation and the deformation under static loading will be discussed to clear whether the consolidation exists. The variation of pore water pressure and the development of the effective stress under long-term dynamic loading will be analyzed to interpret the role of the pore water pressure plays in the soften process of the mechanical behavior. On the basis, a numerical model for predicting the pore water pressure variation and the settlement tendency of warm permafrost beneath the embankment under multiple loadings will be established finally. |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346856 |
| 推荐引用方式 GB/T 7714 | 张虎.动、静荷载下孔压对饱和高温冻土力学性质影响机理.2015. |
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