关键词: 重力坝, 多软弱夹层, 抗滑稳定, 失稳判据

Abstract: Comparative study of numerical simulation methods for deep-seated sliding stability of gravity dams under multiple criteria// by WANG Linfa// Liaoning Shengshun Construction Engineering Co., Ltd. Abstract: This study focuses on the surface spillway section of the gravity dam of a reservoir. Using both thin-layer element and contact element to simulate the deep shear zone in dam foundation, a finite element model of dam body and foundation is established to systematically analyze its deep-seated slid ⁃ ing stability. By comprehensively considering four instability criteria, namely displacement discontinui ⁃ ty, plastic zone penetration, energy discontinuity and contact surface state, the sliding stability safety fac ⁃ tors along faults F1, F2 and F3 are obtained as 3.0, 1.6 and 2.0. The study shows that the energy criteri⁃ on and contact surface state criterion are in good agreement with the traditional plastic zone criterion, validating the effectiveness of the multi-criteria comprehensive analysis method.

Key words: gravity dam, multiple weak interlayers, sliding stability, instability criterion