| 多年冻土区片块石路基尺度效应的数值研究 |
| |
| 引用本文： | 董元宏,邵广军,张会建,符进.多年冻土区片块石路基尺度效应的数值研究[J].路基工程,2019,0(6):24-27. |
| |
| 作者姓名： | 董元宏 邵广军 张会建 符进 |
| |
| 作者单位： | 中交第一公路勘察设计研究院有限公司、高寒高海拔地区道路工程安全与健康国家重点实验室,西安,710065 |
| |
| 基金项目： | 陕西省创新能力支撑计划——青年科技新星项目（2017KJXX-25，2017KJXX-26，2019KJXX-79） |
| |
| 摘 要： | 为了分析片块石路基的尺度效应问题，通过数值手段，计算相同条件下窄幅和宽幅路基的片块石层对流强度和冻土地温。研究结果表明:相比于窄幅路基，宽幅片块石路基的最大对流风速降低了34%，冻土上限下降了1.08 m，冻土年平均地温升高了0.90℃。因此，对片块石路基的尺度效应问题不容忽视，表现在工程应用上，不能简单地将片块石路基直接应用于多年冻土区高速公路宽幅路基，应采取结构优化设计，或与其他结构组成复合路基结构。
|
| 关 键 词： | 多年冻土 片块石路基 尺度效应 数值分析 降温效果 |
| 收稿时间： | 2019-03-15 |
Numerical Study on the Scale Effect of Crushed-rock Embankment in Permafrost Regions |
| |
| Abstract: | In order to analyze the scale effect of crushed-rock embankment, the convection strength and ground temperature of narrow and wide crushed-rock embankments was calculated through numerical method in this paper. The results showed that, compared with narrow embankment, the maximum convective wind speed of wide embankment was decreased by 34%, the permafrost upper limit moved downwards by 1.08 m, and the mean annual ground temperature was increased by 0.90℃. The study in this paper illustrated that, the scale effect of crushed-rock embankment is nonnegligible. As for engineering application, the crushed-rock embankment can't be directly applied to wide expressway embankment, which should be conducted a structural optimization or composed compound subgrade structure with other structures. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《路基工程》浏览原始摘要信息 |
|
点击此处可从《路基工程》下载全文 |
|
