复杂地基上重力坝的破坏过程及稳定安全度研究

发布时间：2018-01-07 03:07

本文关键词：复杂地基上重力坝的破坏过程及稳定安全度研究　出处：《中国农村水利水电》2016年02期 　论文类型：期刊论文

【摘要】：复杂地基上重力坝的整体稳定一直备受关注。为了对复杂地基上重力坝整体稳定及破坏过程进行研究,对某水电枢纽典型坝段进行三维地质力学模型试验,采用超载法对该水电枢纽天然地基方案的典型坝段进行破坏试验。得到坝基的破坏过程及变形变位特点,并得出超载安全系数Kp=3.0。再结合有限元,采用综合法进行计算,所得综合安全系数Kc=2.5。模型试验和计算所得大坝破坏失稳过程相似,两者进行对照,相互验证确保工程稳定分析成果的准确性与可靠性,且研究成果可为类似问题中综合法的使用提供借鉴和参考。
[Abstract]:The overall stability of gravity dam on complex foundation has attracted much attention. In order to study the overall stability of gravity dam on complex foundation and the failure process of the 3D geomechanical model test for typical dam of a hydropower project, by overloading method of the typical dam hydropower natural foundation scheme for destruction test. The deformation and displacement characteristics of the failure process of dam foundation get, and draw the overload safety factor Kp=3.0. combined with finite element method, calculated using the method of comprehensive, comprehensive safety coefficient of the Kc=2.5. model test and calculation of dam failure process are similar, both the control accuracy and reliability analysis, mutual verification results to ensure the stability of Engineering, and the research results can provide a reference for the comprehensive use similar problems.

【作者单位】：四川大学水力学与山区河流开发保护国家重点实验室水利水电学院;
【基金】：国家自然科学基金资助项目(51379139,51409179)
【分类号】：TV642.3
【正文快照】： 重力坝作为出现最早的坝型,在世界已建大坝中占有着相当大的比重。重力坝的稳定问题一直受到社会各界高度重视,尤其是在复杂地基条件下的整体稳定问题更是重中之重[1]。天然地基条件下的重力坝坝基经常含有节理、破碎带及软弱夹层等,直接对大坝坝基的稳定产生无法忽视的影响。

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