scholarly journals Failure Mechanism and Countermeasures of an Operational Railway Tunnel Invert in Horizontally Stratified Rock Masses

2022 ◽  
Vol 22 (2) ◽  
Author(s):  
Linyi Li ◽  
Junsheng Yang ◽  
Jian Wu ◽  
Shuying Wang ◽  
Xinghua Fang ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Rock Masses ◽  
Railway Tunnel ◽  
Stratified Rock

scholarly journals Buckling Failure Mechanism of a Rock Dam Foundation Fractured by Gentle Through-Going and Steep Structural Discontinuities

2020 ◽  
Vol 12 (13) ◽  
pp. 5426
Author(s):  
Donghui Chen ◽  
Huie Chen ◽  
Wen Zhang ◽  
Chun Tan ◽  
Zhifa Ma ◽  
...  
Keyword(s):  
Numerical Method ◽  
Failure Mechanism ◽  
Shear Failure ◽  
Distinct Element ◽  
Mechanism Analysis ◽  
Rock Masses ◽  
Dam Foundation ◽  
Deformation Features ◽  
Universal Distinct Element Code ◽  
Distinct Element Code

The failure mechanism analysis of dam foundations is key for designing hydropower stations. This study analyses the rock masses in a sluice section, which is an important part of the main dam of the Datengxia Hydropower Station currently built in China. The stability of the sluice rock masses is predominantly affected by gentle through-going soft interlayers and steep structural fractures. Its foundation failure mechanism is investigated by means of a numerical method, i.e., Universal Distinct Element Code (UDEC) and the geomechanical model method. The modeling principle and process, and results for the rock dam foundation are introduced and generated by using the abovementioned two methods. The results indicate that the failure mechanism of the foundation rock masses, as characterized by gentle through-going and steep structural discontinuities, is not a conventional type of shear failure mechanism but a buckling one. This type of failure mechanism is verified by analyzing the deformation features resulting from the overloading of both methods and strength reduction of the numerical method.

The failure mechanism and construction practice of large underground caverns in steeply dipping layered rock masses

2019 ◽  
Vol 250 ◽  
pp. 45-64 ◽  
Author(s):  
Yang-Yi Zhou ◽  
Ding-Ping Xu ◽  
Gong-Kai Gu ◽  
Ke Liu ◽  
Liang-Peng Wan ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Rock Masses ◽  
Layered Rock ◽  
Underground Caverns ◽  
Construction Practice
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