Details

Autor(en) / Beteiligte

• Li, Zheng-Wei
• Yang, Xiao-Li
• Li, Tian-Zheng

Titel

Static and seismic stability assessment of 3D slopes with cracks

Ist Teil von

• Engineering geology, 2020-02, Vol.265, p.105450, Article 105450

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The majority of extant analyses on slope stability assumed a two-dimensional plane-strain condition and/or an intact slope. However, slope failures typically exhibit three-dimensional (3D) characteristics and cracks are commonly present in cohesive slopes. This study develops a framework based on the kinematic limit-analysis method for static and seismic stability evaluation of 3D slopes with cracks. A pseudo-static approach is adopted to represent seismic effects. Two types of cracks are considered: cracks prior to slope failure (open cracks) and cracks forming contemporaneously with slope failure (formation cracks). A 3D horn-like collapse mechanism including a vertical crack is used to represent the slope collapse. A comparison with previous studies is conducted to validate the proposed approach. A series of stability charts is presented for the ease of direct use. Results show that consideration of seismic effects and existence of cracks lead to a significant reduction in slope stability, whereas the inclusion of 3D effects yields a greater safety factor. The influence of cracks becomes more significant for slopes with greater inclination angles and higher levels of soil cohesion. This study considers a more realistic situation, the results of which can serve as a reference tool in the seismic design of slopes. •Static and seismic stability of 3D slopes with cracks is studied.•The influence of both open cracks and formation cracks is included.•Considering seismic effects and existence of cracks will reduce slope stability•The inclusion of 3D effects yields a greater safety factor•The effect of cracks is more significant at greater inclination angles and higher levels of soil cohesion.