Thermo-mechanical Coupled Analysis on Embankment Longitudinal Cracks in Warm Permafrost Regions
Based on the field data, the thermo-mechanical coupled model was set up to simulate how the sunny shady slope effect the embankment longitudinal cracks in warm unstable permafrost regions. The corresponding conclusion had a good agreement with the feild results. (1) The uneven settlement between the sunny side and the shady side leads to that the whole embankment was leaning to the sunny side. And the soil of sunny slope is influenced by the thaw bowl under it, so the settlement of the sunny side is more than that of the shady one. The longitudinal cracks was caused by both horizontal and vertical displacement. As a result, the longitudinal cracks goes through the embankment by a inclined form. (2) The longitudinal cracks development is due to strength failure of permafrost. The permafrost under the sunny slope thaws into soft soil layer, so under the above earth pressure there happens tensile stress in the embankment. (3) The “0 displacement line is presented. When the most draw-stress or the minimum compressive stress on the bottom of the embankment takes place, the longitudinal cracks depends on whether there appears “0 displacement line on the embankment bottom. Where the“0 displacement lineis, and where the longitudinal cracks is.
Embankment in permafrost regions Sunny slope and shady slope longitudinal cracks Thermo-mechanical couple d 0 displacement line
CHOU Yaling SHENG Yu ZHU Yanpeng
School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China, 730050 State key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering
国际会议
成都
英文
585-590
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）