Study on Stability of Anchored Slope under Static Load with Weak Interlayer

Mengliang Gao, Haifeng Gao, Qiang Zhao, Zhihuan Chang and Chenxi Miao ()
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Mengliang Gao: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Haifeng Gao: Lvliang South Expressway Branch of Shanxi Transportation Holding Group Co., Ltd., Lvliang 032200, China
Qiang Zhao: Lvliang South Expressway Branch of Shanxi Transportation Holding Group Co., Ltd., Lvliang 032200, China
Zhihuan Chang: Lvliang South Expressway Branch of Shanxi Transportation Holding Group Co., Ltd., Lvliang 032200, China
Chenxi Miao: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Sustainability, 2022, vol. 14, issue 17, 1-16

Abstract: To study the stability characteristics of a rock slope with a weak interlayer, a test of the anchor frame slope was designed in this paper. The analysis model was established with FLAC 3D , and the development law of safety factor, deformation, axial anchor force, soil pressure and maximum shear strain increment of the slope, and the supporting effect of frame anchor cable were obtained by grading loading. The research showed that the supporting effect of frame anchor cable support on the slope was remarkable, and the influence of slope vertical load on the slope safety factor was evident. The lateral deformation mode of the slope surface was large up and down, and minor in the middle. The weak intercalated layer blocked the internal diffusion of the settlement. The failure trend of slope was sliding along the weak interlayer and collapse occurred below the loading zone, and the final failure mode is wedge failure. The peak value of maximum shear strain increment was developed along the weak interlayer, and a shear strain mutation zone was formed inside the slope. It could be considered that the weak interlayer was the potential sliding surface of the slope.

Keywords: model test; numerical simulation; anchorage slope; weak intercalated layer; stability analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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