Abstract:
Many highways in mountainous areas, particularly the Northern region of Thailand, inevitably confront the problems of excessive movement and slope failure. Therefore, slope stability analysis including highway design, construction and maintenance area are very important. Detailed surface topography is important when analyzing the stability of slopes. Recent advances in new technologies have allowed us to obtain high-precision profles of slope information for three-dimensional (3D) slope stability analysis. This research presents a slope reinforced by micro piles of highway No. 1009 Chom Thong - Doi Inthanon, between km 19 + 585.00 - 19 + 750.00, Chiang Mai Province. A comprehensive approach that integrates Global Positioning System (GPS) and 3D fnite element method for slope stability analysis. The soil behavior and soil movement were investigated. The modelling results show that the surface sampling resolution can affect the prediction accuracy of the potential failure zones. The reinforced slope showed an increase in safety factor. The numerical modeling was capable to reproduce satisfactorily the horizontal displacements of slope reinforced by micro piles.