Comparison of seismic stability for slopes with tensile strength cut-off and cracks

Zhang, Yingbin; Liu, Yan; Yuan, Ran; He, Yi

doi:10.1007/s11629-021-6777-4

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…Unfortunately, the crack depth was only considered as a constant, which was not consistent with actual landslides. On the other hand, in recent years, under the framework of limit analysis method, associating pre-existing cracks of slope stability was also analyzed by different scholars, such as Li et al, Zhou et He et al, who have been developing 2D and 3D calculated models and analyzing seismic effects, surcharge, and water pressure on the slope with tensile cracks [25][26][27][28][29][30]. In the above research works, a prominent problem was the crack depth, and location in the slope was still assumed.…”

Section: Introductionmentioning

confidence: 99%

Research on Fracture Mechanism and Stability of Slope with Tensile Cracks

Chen

Wang

2022

Applied Sciences

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Tensile cracks at the crest of slope will attenuate the stability of slope. The aim of this paper is to investigate the computation of safety factors acting on a clay slope when the slip surface consists of tensile crack and shear surface. Based on the theory of limit equilibrium, an analytical solution for safety factors containing three types of failure mechanisms is presented. The optimal crack depth was obtained by using the principle of minimum safety factor. In the solution, effects of parameters such as crack depth, slope angle, height, cohesion, and internal friction angle on slope stability were discussed. By comparing with the results of previous studies, the rationality of the proposed approach was verified. Results show that consideration of tensile cracks lead to a significant reduction in slope stability, and the safety factor decreases by about 10% compared with the slope without cracks. The law of safety factor varying with crack depth indicates that it first decreases as the crack depth is increased and then increases as the crack depth is further increased. Through the parametric analysis, it is found that the safety factor increases with an increase in cohesion and internal friction angle but decreases with the slope angle and height increase. It is important to note that the optimal crack depth does not exceed one-third of the slope height. Moreover, a highway landslide that occurred in the road running across the Yunnan and Tibet Province was investigated to verify the practicality of the present method.

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