Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Block stability analysis considering depth-dependent damage on bedding planes due to blasting
The study presents a case study on the stability analysis of a rock s lope using block theory. During the early stages of excavation of the intake slope, which is a dip slope with the bench face angle greater than the dip angle of the bedding planes, local failures due to sliding along bedding planes occurred. Then, the slope stability was re-evaluated using a two-dimensional (2-d) limit equilibrium method with new strength parameters of the bedding planes obtained through back-analysis. If overall sliding along bedding planes is considered, according to the re-evaluation results, the corresponding FOS will be less than 1.0 even if reinforcement is added. In view of this problem, a thorough investigation aimed at the cause of the sliding failures and the evaluation of the slope stability was performed. This study proposed consideration of the weathering unloading of shallow strata and the damage depth of blasting and reasonably utilised the lateral constraint of the downstream transverse slope sections. Based on the analytical results from block theory, the study proposed suggestions for slope support designs and measures for construction safety which have been adopted and implemented by various design organisations. The results have been verified by subsequent excavation.
Block stability analysis considering depth-dependent damage on bedding planes due to blasting
The study presents a case study on the stability analysis of a rock s lope using block theory. During the early stages of excavation of the intake slope, which is a dip slope with the bench face angle greater than the dip angle of the bedding planes, local failures due to sliding along bedding planes occurred. Then, the slope stability was re-evaluated using a two-dimensional (2-d) limit equilibrium method with new strength parameters of the bedding planes obtained through back-analysis. If overall sliding along bedding planes is considered, according to the re-evaluation results, the corresponding FOS will be less than 1.0 even if reinforcement is added. In view of this problem, a thorough investigation aimed at the cause of the sliding failures and the evaluation of the slope stability was performed. This study proposed consideration of the weathering unloading of shallow strata and the damage depth of blasting and reasonably utilised the lateral constraint of the downstream transverse slope sections. Based on the analytical results from block theory, the study proposed suggestions for slope support designs and measures for construction safety which have been adopted and implemented by various design organisations. The results have been verified by subsequent excavation.
Block stability analysis considering depth-dependent damage on bedding planes due to blasting
Atlantis Highlights in Engineering
Xiang, Ping (Herausgeber:in) / Yang, Haifeng (Herausgeber:in) / Yan, Jianwei (Herausgeber:in) / Ding, Faxing (Herausgeber:in) / Lu, Bo (Autor:in) / Xu, Dongdong (Autor:in) / Wang, Jiliang (Autor:in)
International Conference on Hydraulic, Civil and Construction Engineering ; 2023 ; Changsha, China
24.04.2024
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Landsliding along bedding planes
| Online Contents | 1977
Landsliding along bedding planes
| Online Contents | 1977