Formation Mechanism and Stability Analysis of Bei’an-Heihe Expressway Expansion Project K178 Landslide
Correctly analyze the formation mechanism and failure mode of the landslide and reasonably evaluate the stability of landslide, can provide scientific basis for landslide controlling. Employed the field investigation, field monitoring, indoor experiment and numerical simulation methods to carry a systematic study on the stability condition and formation mechanism of the Bei-Hei expressway expansion project K178 landslide, the results show that: the silty clay which is loose when dried, and is soft plastic when saturated glides along the surface of bedrock; the safety factor during surveying is 1.21, the landslide is temporarily in a steady state, when the water content of rupture surface soil is increased to 30.5% , the safety factor will reduce to below 1.0, the landslide will be instability; atmospheric precipitation, snowmelt water and seasonally frozen soil thawing water provide water for landslide, cracks and high permeability of main body soil provide passage for water infiltration, mudstone and sandstone with low permeability form aquifuge, silty clay above the aquifuge which is influenced by infiltration water to reach saturation forms rupture surface.
Qing Yang, Li Hua Zhu, Jing Jing He, Zeng Feng Yan and Rui Ren
H. Jiang and W. Shan, "Formation Mechanism and Stability Analysis of Bei’an-Heihe Expressway Expansion Project K178 Landslide", Advanced Materials Research, Vols. 368-373, pp. 953-958, 2012