水电能源科学

沙坪一级胶结砂砾石坝为胶结砂砾石筑坝技术在大型水电主体工程中的首次应用，其配套设计体系尚有许多亟待完善的技术要点。对此，采用理论分析、物理试验、数值模拟及工程调研等方法，对胶结砂砾石坝结构及构造设计进行了深入研究。结果表明，胶结砂砾石坝断面根据地基条件和筑坝材料等情况综合确定，结构计算推荐采用单一安全系数法；坝体分区宜根据功能要求进行划分，可采用富浆胶结砂砾石作为坝面防渗保护层；坝体一般不设置纵横缝，当建筑物布置需要和施工强度制约时可设置横缝；防渗保护层应设置横缝；坝体横缝与河水接触部位均设置止水，以保护内部胶结砂砾石；胶结砂砾石坝体可不采取温控措施。研究成果为胶结砂砾石筑坝技术在大中型水电工程中的应用积累了宝贵经验。

The CSGR dam of Shaping I-stage is the first application of cemented sand gravel and rock dam construction technology in the main project of large hydropower station, and its supporting design system still has many technical points to be improved. In this paper, theoretical analysis, physical tests, numerical simulation and engineering research methods were used to study the structure and structural design of the CSGR dam. The results show that the section of the CSGR dam is determined comprehensively according to the foundation conditions and dam building materials, and the single safety factor method is recommended for structural calculation; The zoning of the dam body should be divided according to functional requirements, and the rich slurry cemented sand gravel and rock can be used as the anti-seepage protective layer on the dam surface; Generally, the dam body is not provided with longitudinal and transverse joints, and transverse joints can be provided when the building layout needs and the construction strength is restricted; The anti-seepage protection layer of the dam should be equipped with transverse joints; Waterstop shall be set at the contact part between the dam transverse joint and the river to protect the internal CSGR; Temperature control measures may not be taken for the CSGR dam. The research results have accumulated valuable experience for the application of the CSGR dam construction technology in large and medium-sized projects.