|
View Paper
THE MONITORING OF SOIL PORE WATER PRESSURE AND SOIL TEMPERATURE IN CUTTING SLOPE BEFORE AND AFTER AUFEIS
Session: Characterization of Permafrost State and Variability II / Caractérisation et variabilité du pergélisol II
Wei Shan, Northeast Forestry University (China)
Ying Guo, Institute of Cold Regions Science and Engineering, Northeast Forestry University (China)
Zhaoguang Hu, Institute of Cold Regions Science and Engineering, Northeast Forestry University (China)
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.
|
