中文摘要：

吸收堆石坝和混凝土重力坝的优点并克服其缺点，提出了一种新型的混凝土．堆石混合坝技术，该坝型的特点是：坝体由上游带支墩的混凝土墙和下游堆石体组合而成，支墩设在混凝土墙后并以一定距离分布，混凝土墙和堆石体之间设置垫层和过渡层。以某心墙堆石坝工程为对象建立了混合坝数值模型，分析混合坝在竣工和蓄水工况下的坝体应力和变形特征，并与原心墙堆石坝工程性状进行对比分析。研究表明：混凝土墙后土压力呈非线性分布；混凝土墙受力以压弯为主，最大拉应力出现在墙踵处；支墩受力以弯剪为主，最大拉应力出现在支墩与混凝土墙连接处；堆石体整体应力水平比心墙堆石坝降低，安全性有较大幅度提高。技术经济分析比较表明，与心墙堆石坝相比，混合坝具有安全稳定、保护环境、节约材料等优点。

英文摘要：

A new type of dam, a concrete-rockfill combination dam, is proposed. It has the advantages of a concrete gravity dam and a rockfill dam, and overcomes their disadvantages. The basic features of this dam are as follows ： the dam body consists of an upstream concrete wall with counterforts and downstream rockfill, counterforts are installed behind the concrete wall at some intervals, and a cushion layer and a transition layer are installed between the concrete wall and rockfill monolith. A combination dam numerical model was built based on a core rockfill darn, and the basic characteristics of the stress and deformation of the combination dam at completion time and during the water storage period were studied and compared with an asphalt concrete core dam. The results show that the distribution of earth pressure against the concrete wall was nonlinear; the concrete wall was mainly subjected to a bending moment and compression, and the maximum tensile stress appeared in the wall heel; the counterforts were mainly subjected to the bending moment and shear force, and the maximum tensile stress appeared in the joint with the concrete wall; the stress level of rockfill was less than that of the core rockfill dam; and the safety of this type of dam was greatly improved. Technological and economic analysis show that the combination dam is more secure, more environmentally friendly, and needs less material compared with the core rockfill dam.