高拱坝基础不对称性及其加固效果研究

发布时间：2018-03-09 12:42

本文选题：不对称性　切入点：高拱坝　出处：《岩土力学》2017年02期 　论文类型：期刊论文

【摘要】：高拱坝工程基础地质及地形条件的不对称是威胁拱坝安全的重要问题。以白鹤滩高拱坝作为工程实例,通过地质力学模型试验重点研究基础不对称的高拱坝应力、变形及破坏模式的特点。针对初始方案和改进后方案分别建立三维数值模型,并进行弹塑性有限元超载计算。对比分析两方案坝体变形、坝肩应力分布、局部和整体稳定性等的不同,并结合试验现象,分析和评价针对基础不对称性的改进措施的加固效果及加固机制。结果表明:体形不对称性设计及基础加固的协同作用能有效改善坝体变形对称性、坝肩应力状态和传力效果,并提高拱坝-地基系统的整体稳定性。白鹤滩拱坝不对称性问题的研究对深入高拱坝设计优化和工程加固的认识具有重要意义。
[Abstract]:The asymmetry of basic geological and topographic conditions of high arch dam is an important problem threatening the safety of arch dam. Taking Baihetan high arch dam as an engineering example, the stress of high arch dam with asymmetrical foundation is studied by means of geomechanical model test. The characteristics of deformation and failure mode. According to the initial scheme and the improved scheme, the three-dimensional numerical model is established, and the elastic-plastic finite element overload calculation is carried out. The deformation and abutment stress distribution of the two schemes are compared and analyzed. Local and global stability, etc., combined with experimental phenomena, This paper analyzes and evaluates the reinforcement effect and mechanism of the improvement measures aiming at the asymmetry of foundation. The results show that the asymmetric design of body shape and the synergistic effect of foundation reinforcement can effectively improve the deformation symmetry of dam body, the stress state of dam abutment and the effect of force transfer. The study on the asymmetry of Baihetan arch dam is of great significance to the deep understanding of the design optimization and engineering reinforcement of high arch dam.
【作者单位】：清华大学水沙科学与水利水电工程国家重点实验室;中国电建集团华东勘测设计研究院有限公司;
【基金】：国家自然科学基金面上项目(No.51479097,No.51279086) 水沙科学与水利水电工程国家重点试验室科研项目资助(No.2016-KY-2) supported by the General Program of National Natural Science Foundation of China(51479097,51279086) the Research Project of State Key Laboratory of Hydroscience and Hydraulic Engineering(2016-KY-2)
【分类号】：TV642.4;TV223

【相似文献】