Deformation and simulation analysis of slope at outlet of flood discharge tunnel. (May 2022)

• Record Type: Journal Article
• Authors: Jiang, Juan
• Is Part Of: Energy reports. Volume 8(2022)Supplement 2
• Page Start: 251
• Page End: 258
• Publication Date: 2022-05
• Subjects: Flood discharge tunnel -- Slope -- Deformation monitoring -- Numerical simulation; Power resources -- Periodicals; Energy industries -- Periodicals; Power resources; Periodicals; Electronic journals; 621.04205
• DOI: 10.1016/j.egyr.2021.11.037
• Languages: English
• ISSNs: 2352-4847

Abstract

Abstract: The monitoring data of slope deformation are collected, the dynamic change and development trend of displacement are analyzed, and the deformation laws of different elevation parts are counted. Three-dimensional numerical model of the outlet slope of spillway tunnel is established by finite element method, and excavation simulation analysis is carried out. The results show that after the slope excavation is completed, the plastic zone gradually increases, mainly in compression-shear failure, and tensile-shear failure exists on faults, slope surfaces and local rock mass. The field measured deformation data show that the horizontal cumulative displacement and vertical cumulative displacement increase slowly, both exceeding 200 mm, and the horizontal displacement is larger than the vertical displacement. The monthly dynamic changes of horizontal displacement and vertical displacement are basically fluctuating within 5 mm. Through the combination of deformation measurement and simulation, the displacement variation law of slope and the distribution characteristics of plastic zone are analyzed, which can provide guidance for on-site slope stability prediction and safety construction.