ANALYSIS AND PREDICTION OF TEMPERATURE AND STABILITY OF SWAMPY AND SLOPE ROADBED IN PERMAFROST REGIONS OF QINGHAI-TIBET RAILWAY

JIANG Long; WANG Lianjun

Volume 16 Issue 2

Oct. 2010

Turn off MathJax

Article Contents

Article Navigation > JOURNAL OF ENGINEERING GEOLOGY > 2008 > 16(2): 239-244

JIANG Long, WANG Lianjun. 2008: ANALYSIS AND PREDICTION OF TEMPERATURE AND STABILITY OF SWAMPY AND SLOPE ROADBED IN PERMAFROST REGIONS OF QINGHAI-TIBET RAILWAY. JOURNAL OF ENGINEERING GEOLOGY, 16(2): 239-244.

Citation:

JIANG Long, WANG Lianjun. 2008: ANALYSIS AND PREDICTION OF TEMPERATURE AND STABILITY OF SWAMPY AND SLOPE ROADBED IN PERMAFROST REGIONS OF QINGHAI-TIBET RAILWAY. JOURNAL OF ENGINEERING GEOLOGY, 16(2): 239-244.

Citation:

PDF( 0 KB)

ANALYSIS AND PREDICTION OF TEMPERATURE AND STABILITY OF SWAMPY AND SLOPE ROADBED IN PERMAFROST REGIONS OF QINGHAI-TIBET RAILWAY

School of Civil Engincering and Arehitecture,Beijing Jiaotong University, Beijing 100044

Funds:

Received Date: 2007-01-29
Rev Recd Date: 2007-05-08
Publish Date: 2008-04-30

Abstract

Abstract

Stability of slope roadbed in the permafrost regions of Qinghai-Tibet railway is a potential threat to the railway long-term operation. Assessment of stability of the current and future slope roadbed can guide the roadbed project to correctly design and construction, thus ensuring to operate the railway safely. Changes of ground temperature of permafrost make the analysis of the slope roadbed stability different from others. The location of the freezing-thawing interface is an all-important constraint of the stability of the slope roadbed. Through monitoring the ground temperature at the Anduo section for three years, the changes of the roadbed ground temperature are analyzed and the change trend of the ground temperature in the next 50 years is predicted. The stability model of the present and future slope roadbed is established and the stability of the slope roadbed is calculated and analyzed. Through these investigations, conclusions can be made as follows: (1)filling the railway embankment makes the permafrost temperature field redistribute; the asymmetry of the slope direction and the geometric asymmetry make the ground temperature field asymmetric; (2)based on the location of the freezing-thawing interface and the ground temperature characteristics of the active layer, the frozen roadbed can be divided into four different times, namely, the severe winter period (January-February), the spring and summer melting active period (March-August), the largest thawing depth period (September-October) and the refreezing active period (November-December); (3)the numerical analysis results show that 20 years later, the permafrost of the Anduo test section roadbed will completely degrade, and the stability coefficient in the largest thawing depth period is the minimum in the forecast 10th year.
- Permafrost,
- Freezing-thawing interface,
- Slope roadbed,
- Coefficient of stability,
- Ground temperature,
- Qinghai-Tibet Railway,
- Prediction

FullText(HTML)

References(1)

References

[1] Cheng Guodong. The impact of local factors on permafrost distribution and its inspiring for design Qinghai-Xizang railway
[J].Science in China(Series D),2003, 33 (6):602~607.

[2] Michalowsk R.L.. Slope stability analysis: a kinematical approach
[J]. Geotechnique, 1995, 45 (2):283~293.

[3] 牛富俊,张鲁新,俞祁浩,等.青藏高原多年冻土区斜坡类型及典型斜坡稳定性研究
[J].冰川冻土,2002, 24 (5):608~613.
Niu Fujun, ZHang Luxin, Yu Qihao, et al.. Study on slope types and stability of typical slopes in permafrost regions of the Tibetan Plateau. Journal of Glaciology and Geocryology, 2002, 24 (5):608~613.

[4] 牛富俊,程国栋,赖远明,等.青藏高原多年冻土区热融滑塌型斜坡失稳研究
[J].岩土工程学报,2004, 26 (3):402~406.
Niu Fujun, CHeng Guodong, Lai Yuanming, et al. Instability study on thaw slumping in permafrost regions of Qinghai-Tibet Plateau. Chinese Journal of Geotechnical Engineering, 2004, 26 (3):402~406.

[5] 郑颖人,赵尚毅.岩土工程极限分析有限元法及其应用
[J].土木工程学报,2005, 38 (1):91~98.
Zheng Yingren, Zhao Shangyi. Limit state finite element method for geotechnical engineering analysis and its applications. China Cinil Engineering Journal, 2005, 38 (1):91~98.

[6] 冯文杰,马巍,张鲁新,等.碎块石护坡在寒区道路工程中的应用
[J].冰川冻土,2003, 25 (6):632~637.
Feng Wenjie, Ma Wei, Zhang Luxin, et al.. Application of riprap slope protection to roadway engineering in permafrost regions. Journal of Glaciology and Geocryology, 2003, 25 (6):632~637.

[7] Goering, D J. Passively cooled railway embankment for use in permafrost areas
[J]. Journal of Cold Regions Engineering,2003, 17 (3):119~133.

[8] 喻文兵,赖远明,张学富,等. 块石层与碎石层降温效果室内试验研究
[J].冰川冻土,2003, 25 (6):638~643.
Yu Wenbing, Lai Yuanming, Zhang Xufu, et al.. Experimental study on the cooling effect of block stone and crushed stone. Journal of Glaciology and Geocryology, 2003, 25 (6):638~643.

[9] 孔祥谦.有限单元法在传热学中的应用
[M].北京:科学出版社,1998.
Kong Xiangqian. Application of finite element method in heat transfer. Beijing: Science Press, 1998.

[10] 晏长根,等.大渡河猴子岩水电站库尾段藏碉群斜坡巨型堆积体的成因分析
[J].工程地质学报,2006, 14 (2):159~164.
Yan Changgen, et al.. Nvestigation of the formation of huge quaternary deposits on Dadu river near Houziyan hydropower dam. Jouranl of Engineering Geology, 2006, 14 (2):159~164.

[11] 蒋良潍,黄润秋.反倾层状岩体斜坡弯曲-拉裂两种失稳破坏之判据探讨
[J].工程地质学报,2006, 14 (3):289~294.
Jiang Liangwei, Huang Runqiu. Bending yielding and tensile cracking critera for failure of rock slope whose dip direction opposite to the dip direction of strata. Jouranl of Engineering Geology, 2006, 14 (3):289~294

Relative Articles

Supplements(0)

Cited By

Proportional views