Study of seismic slope stability based on modified stabilizing piles model

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (24) : 14-23.

JIA Zhibo1，TAO Lianjin2，PAN Jing2，REN Yujie2，QIU Mingyang2，LIU Jiangong2，DENG Lijia2

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Abstract

Application ofSstabilizing piles is the main reinforcement measure of the slope. In research, stabilizing piles are often simplified to elastic or elastic-plastic structuresoften use elastic or elastoplastic models, which do not reflect the failure caused by shear forces and bending moments. To study the instability mechanism of the stabilized pile slope, a correction module based was established, which simulated the fracture by adding the failure stage. Based on the Wenchuan earthquake investigation, the selection principle of failure criterion iwas analyzed. The new model is was applied to the dynamic response analysis. The influence of pile failure on the slope is was explored from the indexes of maximum shear force, acceleration, spectrum, and displacement. Besides, the deformation coordination relationship between piles in the three-dimensional slope is was discussed under the fracture frame. The results show that: 1) the fracture effect can be achieved by constructing and calling the correction module. The modified model has two stages. Once the internal force reaches the limit value, the anti-sliding effect of the pile disappears. The failure will cause a sudden change of acceleration, higher frequency, and greater residual displacement. 3) The fracture sequence is the reflection of the relationship between the stabilizing piles. The neglect of pile interaction may lead to the underestimation of landslide risk

Key words

Stabilizing pile / Slope / Seismic loads / Structure failure / Design optimization

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JIA Zhibo1, TAO Lianjin2, PAN Jing2, REN Yujie2, QIU Mingyang2, LIU Jiangong2, DENG Lijia2. Study of seismic slope stability based on modified stabilizing piles model[J]. Journal of Vibration and Shock, 2024, 43(24): 14-23

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