The coupled analysis method of the trial load method and the 3D elasto-viscoplastic block element method is applied to analyze the stress and stability of Dahuashui arch dam.

• 采用三维弹粘塑性块体元法与拱梁分载法的耦合分析方法对大花水拱坝的坝体应力和坝肩稳定性进行了分析。