分析研究了拱坝沿建基面滑动问题的实质及在实际工程中发生的可能性．研究结果表明，在一定的几何与力学参数条件下，拱坝受水压和温度等荷载作用，拱端推力确有使拱坝沿建基面滑动的可能．而这种滑动并不是简单的“上滑”，实际上是略带向上的向下游滑动，且主要是向下游滑动．影响这种滑动的因素是多方面的，包括坝高、河谷断面的形状、水平拱圈的曲率和坝体厚度等．文中就这几种因素对拱坝沿建基面滑动的影响规律进行了探讨．初步分析结果表明，坝愈高，河谷岸坡角愈平缓，水平拱圈愈扁平，坝体愈薄对拱坝沿建基面的抗滑稳定愈不利．为了有效的反映拱坝的整体作用，提出了一种基于刚体极限平衡法的计算拱坝沿建基面滑动的整体稳定分析方法，通过对一理想化的模型坝实例计算，表明此法的分析结果基本合理．最后，结合小湾拱坝工程实际，用本文提出的方法分析了其沿建基面的抗滑稳定问题． The essence of the sliding problem of arch dam along the built surface and the possibility of its occurrence in practical engineering are analyzed and studied. The results show that under some geometrical and mechanical parameters, the arch dam is affected by the load of water pressure and temperature, and the thrust at the arch does make the arch dam slide along the foundation surface. And this sliding is not a simple “slip”, in fact, is slightly upward slide to the downstream, and mainly to the downstream slide. Factors that affect this slip are manifold, including the height of the dam, the shape of the river valley profile, the curvature of the horizontal arch, and the thickness of the dam. In this paper, the influence of several factors on the sliding of arch dam along the foundation is discussed. The preliminary analysis results show that the higher the dam height, the smoother the bank slope angle and the flattened horizontal arch ring. The thinner the dam body is, the worse it will be for the anti-sliding stability of the arch dam along the foundation. In order to reflect the whole effect of arch dam effectively, a new method of calculating the whole stability of arch dams along the base surface is proposed based on rigid body limit equilibrium method. By an ideal model dam example calculation, The result is reasonable. Finally, based on the actual project of Xiaowan arch dam, the anti-skid stability problem along the built surface is analyzed with the method proposed in this paper.