陕西水利Issue(10)：1-4,4.
大坝全过程仿真与裂缝扩展稳定性分析
Full-process dam simulation and crack-propagation stability analysis
摘要
Abstract
Controlling hydration heat in mass concrete is critical during dam construction.Assessing incipient crack growth and stability is a prerequisite for safe operation.Using a roller-compacted concrete double-curvature arch dam as a case study,we examine cracks at both the whole-dam and monolith scales.We apply an end-to-end,whole-dam feedback simulation to compute stresses and deformations under actual construction conditions,and we use a jointed high-fidelity finite-element model to evaluate crack stability and the likelihood of propagation during impoundment under different post-grouting cohesion levels along crack faces.Results show that:(1)safety factors meet code requirements overall.Slight shortfalls appear at the abutments and at the corbel region of the gate pier due to stress concentration and strong foundation restraint;global deformation follows expected patterns.(2)Tensile stresses are currently high near the foundation surface within strongly restrained zones;continued cooling would likely trigger new cracks.(3)With crack-face cohesion set to 1 MPa after grouting,most cracks remain closed in compression at high reservoir levels;however,opening may occur near bedrock in monoliths 1 and 2,and near the crest in monolith 7.(4)With crack-face cohesion set to 3.7 MPa after grouting,existing cracks are expected to maintain bond during operation,and the dam remains in a safe,stable state.关键词
碾压混凝土拱坝/有限元分析/裂缝/应力变形/稳定性Key words
Roller-compacted concrete arch dam/finite element analysis/cracks/stress and deformation/stability分类
建筑与水利引用本文复制引用
王建宁,黄欢,高梓艺,雷龙..大坝全过程仿真与裂缝扩展稳定性分析[J].陕西水利,2025,(10):1-4,4.基金项目
国家级大学生创新训练项目——混凝土通水冷却智能装置(2024131230013) （2024131230013）
