THE MONITORING OF SOIL PORE WATER PRESSURE AND SOIL TEMPERATURE IN CUTTING SLOPE BEFORE AND AFTER AUFEIS

Wei Shan, Ying Guo, Zhaoguang Hu

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Characterization of Permafrost State and Variability II / Caractérisation et variabilité du pergélisol II

ABSTRACT: In northeast China, the cutting slope in road segments of Bei™an to Heihe Highway often occur aufeis. In winter, Icings are formed by refreezing at the surface of emergent discharge from the cutting slope, which destroyed the slope surface and threaten road traffic safety. Monitoring points of ground temperature and pore water pressure were laid out on the cutting slope where aufeis ever happened. The results show that, when soil temperature dropped below 0 °C, the soil pore water pressure rised rapidly to a maximum value. With the water outflow, soil pure water pressure declined slowly. When soil temperature rised above 0 °C, the soil pore water pressure declined rapidly. In same depth, soil temperature where aufeis ever happened is higher than those never had aufeis. Aufeis had the characteristic of seasonal cycles and uncertainty location.

RÉSUMÉ: Dans le nord de la Chine, des glaçages se produisent régulièrement dans les zones en déblai le long de l™autoroute de Bei™an à Heihe. Durant l™hiver, ces glaçages qui se forment par le gel de l™eau souterraine qui jaillit des zones en déblai endommagent ces zones et menacent la sécurité du trafic. Le suivi de la température du sol et des pressions interstitielles dans les zones en déblai a été effectué où des glaçages se forment. Lorsque la température du sol descend sous 0 °C, les pressions interstitielles augmentent rapidement. Suivant le jaillissement de l™eau, ces pressions diminuent lentement. Lorsque la température du sol augmente au-dessus de 0 °C, les pressions interstitielles diminuent rapidement. Pour une profondeur donnée, la température du sol où les glaçages se forment est toujours supérieure à celle où il n™y a pas de glaçage. Ces glaçages ont une périodicité saisonnière et leur localisation est incertaine.

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Cite this article:
Wei Shan; Ying Guo; Zhaoguang Hu (2015) THE MONITORING OF SOIL PORE WATER PRESSURE AND SOIL TEMPERATURE IN CUTTING SLOPE BEFORE AND AFTER AUFEIS in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.

@article{431,author = Wei Shan; Ying Guo; Zhaoguang Hu,title = THE MONITORING OF SOIL PORE WATER PRESSURE AND SOIL TEMPERATURE IN CUTTING SLOPE BEFORE AND AFTER AUFEIS,year = 2015}