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Title: Stability analysis of the permanent shiplock slopes of the three gorges project
Authors: Chen, J
Yin, JH 
Lee, CF
Keywords: Excavation
Finite element method
Permanent shiplock slopes
The Three Gorges Project
Upper bound limit analysis
Issue Date: 2004
Publisher: Pergamon Press
Source: International journal of rock mechanics and mining sciences, 2004, v. 41, no. SUPPL. 1, p. 593-598 How to cite?
Journal: International journal of rock mechanics and mining sciences 
Abstract: The stability of the permanent shiplock slopes is among the key issues in the design and construction of the Three Gorges Project in China. The unloading process due to excavation has negative effects on the mechanical properties of the rock mass in the slopes. This paper employs both the upper bound limit analysis and a finite element method (2D and 3D) to evaluate the stability of permanent slopes under the effects of excavation. The results from different methods effectively support and complement each other. The calculated factors of safety confirm the adequacy of the geological condition for ensuring overall stability of the slopes. After the excavation, the tensile stress and shear-damaged zones mainly occur at the middle and upper parts of central rock barrier and vertical walls. The dominant sliding path would not be formed by the extension and linkage of the local potential sliding surfaces. The global stability of the permanent slopes can be assured. The reinforcement would be required to prevent the local collapse during construction and operation stage.
ISSN: 1365-1609
EISSN: 1873-4545
DOI: 10.1016/j.ijrmms.2004.03.105
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