Analysis of the behavior of a high earth-core rockfill dam considering particle breakage. (May 2023)

• Record Type: Journal Article
• Authors: Liu, Sihong; He, Wen; Sun, Yi; Shen, Chaomin; Wang, Liujiang
• Is Part Of: Computers and geotechnics. Volume 157(2023)
• Publication Date: 2023-05
• Subjects: High earth-core rockfill dam -- Particle breakage -- Constitutive model -- Deformation compatibility -- Numerical analysis; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2023.105320
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: This paper presents a finite element analysis for the behavior of the Lianghekou high earth-core rockfill dam, which was just completed in construction in China. An elastoplastic constitutive model that can account for the degradation of rockfills due to particle breakage (hhu-SH-breakage model) was applied to simulate the mechanical behavior of the rockfills. The earth-core wall was analyzed by using the modified Cam-clay model combined with the Biot's consolidation theory. Numerical results are in good agreement with in-situ measurements during construction, indicating the reasonability of the numerical analysis. Based on the breakage-packing concept, which is able to extract the breakage-induced deformation from the total deformation, numerical analysis showed that the breakage-induced settlement for the extra high rockfill dam is not negligible. Inspired by the sensitivity analysis using the hhu-SH-breakage model, engineering advices were proposed to reduce the settlement of high rockfill dams.