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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。
The geomechanical model test provides a research method for the overall stability and safety of the project. However, whether the loading method reflects the impact of engineering practice or different loading methods on the test results of the comprehensive method still needs further study. The finite element analysis software ANSYS was used to select the typical arch dam with high arch dam engineering. The three-dimensional finite element model was established, and four different loading schemes were calculated and analyzed, and verified with the comprehensive failure test of Shapai high arch dam project. The results show that the displacement of the dam conforms to the general engineering law when the load multiplying factor KP1 before the rock mass reduction is 1.0 or 1.2, and the comprehensive stability safety obtained is smaller than other schemes Project safety considerations, these two loading methods are more reasonable. In view of most of the high arch dam projects after impoundment operation, due to hydrological forecast, reservoir regulation and engineering measures such as more perfect, there is little probability of excessive floods, so the integrated method used to destroy the test loading method is reasonable.