Saruulzaya_etal_2020-p.pdf

Along paved roads in warm permafrost zones, significant settlement and deformations related to creep were found at many places where the embankments are unusually tin in Mongolia. Therefore, the stabilization of the embankments must be taken into consideration based on active cooling and passive cooling methods, we tested out the passive cooling method on the paved roads embankment within this work. The purpose of this study is to investigate the settlement and deformations of the A1101 paved roads in Murun-Khatgal and test insulation material such as geotextile and geomembran in the paved road with 30 m. The experimental embankment is located in the sporadic permafrost zone in Alag-Erdene of Khuvsgul aimag. Furthermore, we measured high-resolution ERT on the permafrost underneath the experimental road using the Wenner and Wenner-Schlumberger arrays. The multi-electrode resistivity technique uses a syscal R+, a switch pro and several multi-core cables. A unit of 96 electrodes plugged into the ground at a fixed distance of 1-5 m. According to the drilling survey, the ground materials identified with hand drilling equipment (TANAKA Japan) at the experimental road during the fieldwork in May 2020. As the results show, frozen ground was identified at boreholes in the site (2.10 m). High-resolution ERT measurements clearly show the permafrost thawing, especially underneath the experimental embankment in the selected road, where the permafrost thawed down to 6-12 m underneath the paved road embankment.