DOI: 10.1007/s11069-021-04947-8
论文题名: Investigation of the role of crown crack in cohesive soil slope and its effect on slope stability based on the extended finite element method
作者: Bao Y. ; Li Y. ; Zhang Y. ; Yan J. ; Zhou X. ; Zhang X.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
语种: 英语
中文关键词: Crack propagation
; Crown crack
; Slope stability analysis
; Stress status
; XFEM
英文摘要: Tensile cracks in soil slopes, especially developing at the crown, have been increasingly recognized as the signal of slope metastability. In this paper, the role of crown cracks in natural soil slopes was investigated and its effect on stability was studied. A numerical modeling of slope and simulation of tensile behavior of soil, based on the Extended Finite Element Method (XFEM), was used. A numerical soil tensile test was applied to validate the use of XFEM on tensile behavior of soil before the simulation. Slope failure was simulated by using the Strength Reduction Method, which determines the potential slip surface of slope. The simulation results indicate forming of crown crack in natural soil slopes when the plastic zone starts penetrating. Therefore, it is reasonable to consider the crown crack as the signal of slope metastability. A sensitivity analysis shows the effect of cracking on slope stability if cracks are at the position of the tension zone. The stress variation analysis, from the surface slip deformation, reveals that the slope is at a state of compressive stress. When plastic zone starts penetrating, the upper part of slope generates tension zone, but the extent of tension zone is restricted by the slope failure. This suggests why tensile cracks are difficult to form and stretch in the deep part of the slope. The implementation of XFEM on slope stability analysis can be used for assessing the tensile strength of soil and forecasting the time of slope failure related disaster. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168900
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), No. 9, Block 4, South Renmin Road, Chengdu, 610041, China; College of Construction Engineering, Jilin University, Changchun, 130026, China; School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Department of Civil Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
Recommended Citation:
Bao Y.,Li Y.,Zhang Y.,et al. Investigation of the role of crown crack in cohesive soil slope and its effect on slope stability based on the extended finite element method[J]. Natural Hazards,2021-01-01