| 暖季强降雨对多年冻土南界斜坡路基稳定性影响分析 |
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| 引用本文： | 段东明,沈宇鹏,张鲁新.暖季强降雨对多年冻土南界斜坡路基稳定性影响分析[J].工程地质学报(英文版),2008,16(2):250-254. |
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| 作者姓名： | 段东明 沈宇鹏 张鲁新 |
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| 作者单位： | 1.北京交通大学土木建筑工程学院 北京 100044; |
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| 摘 要： | 青藏铁路在多年冻土南界地区,夏季强降雨后的入渗,不仅破坏了冻土路基内地温场,降低了土体的强度,同时入渗产生的渗透压力降低了斜坡路基的稳定性。文章采用有限元对青藏铁路安多段多年冻土斜坡路基进行降雨入渗的模拟,并将渗流分析结果作为路基稳定性计算的水力条件。计算结果表明,该冻土斜坡稳定性系数在降雨结束20h内持续变小,而最小值出现在降雨后2d左右。
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| 关 键 词： | 多年冻土南界 降雨 稳定性 入渗 |
| 收稿时间： | 2007-08-27 |
| 修稿时间： | 2007年8月27日 |
STABILITY ANALYSIS OF QINGHAI-TIBET RAILWAY SLOPE EMBANKMENT IN THE EVENT OF RAINSTORM AT THE SOUTHERN BOUNDARY REGION OF THE PERMAFROST ZONE |
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| DUAN Dong-ming,SHEN Yu-peng,ZHANG Lu-xin.STABILITY ANALYSIS OF QINGHAI-TIBET RAILWAY SLOPE EMBANKMENT IN THE EVENT OF RAINSTORM AT THE SOUTHERN BOUNDARY REGION OF THE PERMAFROST ZONE[J].Journal of Engineering Geology,2008,16(2):250-254. |
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| Authors: | DUAN Dong-ming SHEN Yu-peng ZHANG Lu-xin |
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| Institution: | 1.School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044;2.17th Bureau of China Railway, Taiyuan 030006 |
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| Abstract: | There is a potential threat to long-period operation in the sector of embankment upon the slope.Process of infiltration can not only disturbe field of temperature,but creates infiltrating force.The force can reduce the stability of embankment on the slope in the southern limit region of the permafrost zone.Stability of embankment of the Qinghai-Tibet railway on slope is analyzed in the event of rainstorm where the result of infiltrated calculation is used.Consequently,the stability continuously decreases.The minimal value appears after about two days of rainfall. |
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| Keywords: | Southern limit of permafrost Rainstorm Stability Infiltration |
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