Direct shear tests on cemented paste backfill-rock wall and cemented paste backfill-backfill interfaces

作     者：Nabassé J.F.Koupouli Tikou Belem Patrice Rivard Hervé Effenguet 

作者机构：Research Institute in Mining and Environment(RIME) Université du Québec en Abitibi-TémiscamingueRouyn-NorandaQuebecCanada Department of Civil Engineering Université de SherbrookeQuebecCanada Department of Geology Université Marien NGouabiRntzzuvillePenple's Repuhlir of Canga 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2016年第8卷第4期

页      面：472-479页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：financially supported through NSERC Discovery Grant(RGPIN/4994-2014) 

主　　题：Jinping I arch dam Inverse modeling Hydraulic conductivity Fractured rock Groundwater flow Seepage control 

摘      要：Even though a large number of large-scale arch dams with height larger than 200 m have been built in the world, the transient groundwater flow behaviors and the seepage control effects in the dam foundations under difficult geological conditions are rarely reported. This paper presents a case study on the transient groundwater flow behaviors in the rock foundation of Jinping I double-curvature arch dam, the world＇s highest dam of this type to date that has been completed. Taking into account the geological settings at the site, an inverse modeling technique utilizing the time series measurements of both hydraulic head and discharge was adopted to back-calculate the permeability of the foundation rocks,which effectively improves the uniqueness and reliability of the inverse modeling results. The transient seepage flow in the dam foundation during the reservoir impounding was then modeled with a parabolic variational inequality（PVI） method. The distribution of pore water pressure, the amount of leakage, and the performance of the seepage control system in the dam foundation during the entire impounding process were finally illustrated with the numerical results.