高拱坝坝肩稳定综合法破坏试验加载方式研究

发布时间：2018-02-26 02:15

本文关键词： 高拱坝工程综合法试验加载方式有限元计算地质力学模型试验　出处：《水电能源科学》2017年10期 　论文类型：期刊论文

【摘要】：地质力学模型综合法试验为工程的整体稳定安全问题提供了研究方法,但其加载方式能否反映工程实际及不同加载方式对综合法试验结果所产生的影响仍需开展深入研究。采用ANSYS有限元分析软件,选取典型高拱坝工程沙牌拱坝建立三维有限元模型,计算分析四种不同的加载组合方案,并结合沙牌高拱坝工程的综合法破坏试验加以验证。结果表明,四种加载组合方案中,岩体降强前的超载荷载倍数KP1取1.0或1.2时,坝体变位符合一般工程规律,且得出的综合稳定安全度均较其他方案小,从工程安全角度考虑,这两种加载方式均较合理。鉴于大部分高拱坝工程在蓄水运行后,由于水文预报、水库调度和工程措施等较为完善,出现超标洪水的概率不大,因此目前所采用的综合法破坏试验加载方式是合理的。
[Abstract]:The comprehensive test of geomechanical model provides a research method for the overall stability and safety of engineering. However, whether the loading mode can reflect the engineering practice and the influence of different loading modes on the test results of synthetic method still needs to be deeply studied. ANSYS finite element analysis software is used. Three dimensional finite element model of Shapai arch dam, which is a typical high arch dam project, is established, four different loading combination schemes are calculated and analyzed, and verified by comprehensive failure test of Shapai high arch dam project. The results show that, among the four loading combination schemes, When the overload load multiple KP1 is 1. 0 or 1. 2, the displacement of the dam body accords with the general engineering law, and the comprehensive stability and safety degree obtained is smaller than that of other schemes, which is considered from the point of view of engineering safety. In view of the fact that most of the high arch dam projects are in operation after storage, the probability of exceeding the standard flood is not large due to the relatively perfect hydrological forecast, reservoir operation and engineering measures, etc. Therefore, the loading mode of the comprehensive method is reasonable.
【作者单位】：四川大学水利水电学院;
【基金】：国家重点研发计划(2016YFC0401908)
【分类号】：TV642.45

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