【作者】 杨家修；

【导师】 陈胜宏； 杨志雄；

【作者基本信息】 武汉大学 ， 水工结构工程， 2004， 硕士

【摘要】 龙首水电站位于甘肃张掖黑河，地处西北高温、高寒、高震地区，平均气温为8.5℃，极端最高气温37.2℃，极端最低气温-33.0℃，地震设防烈度8度，在这样恶劣的环境下修建碾压混凝土拱坝，需解决很多结构问题。作者为该研究工作的主持者，取得以下丰要成果： (1)结合本工程独特的工程地质条件、水文条件，在碾压混凝土拱坝结构设计方面有所创新和突破； (2)针对本工程地形严重不对称的特点，在两岸做人工拱坝坝肩，以混凝土总量控制为目标，优选拱坝体形及坝肩形式； (3)同时从温控、建筑材料等方面综合考虑，研究抗裂、抗冻、抗震的结构措施。 本文推荐的龙首碾压混凝土拱坝方案与原设计推荐采用的碾压混凝土重力坝方案相比，从混凝土工程量看，可减小混凝土量约14万m~3，相应的开挖、基础处理量也大为减少。节约投资5000万元，同时工期缩短了半年。 龙首水电站全碾压混凝土薄拱坝的建成，证明了碾压混凝土筑坝技术完全能够替代常态混凝土筑坝。为在高温、高寒地区修建碾压混凝土坝积累了成功的经验，具有显著的社会效益。更多还原

【Abstract】 Longshou Hydropower Project (LHP) is located at Black River, Zhangye, North-west China. The dam site belongs to large temperature variation and high seismic area. The average temperature is 8.5℃, the highest temperature is 37.2℃, the lowest temperature is -33.0℃ the seismic intensity is 8 degree. A lot of structure problems are to be solved for the construction of RCC arch dam under such condition. As the chief designer, the author of this theses has conducted the following researches and practices:(1) According to the engineering geology condition and hydrology condition, the breakthrough in the structure design of RCC arch dam has been achieved.(2) According to the topography condition, the artificial abutments scheme is proposed. The concrete quantity being chosen as optimal goal, the dam body is optimized.(3) Through the comprehensive consideration of temperature control and material property, the cracking control, freezing prevention, and earthquake resistance measures have been studied.Compared to the former RCC gravity dam design, the RCC arch dam design proposed by this thesis has the following merits: the concrete saving is 140,000m3 ;the foundation excavation and treatment quantity is decreased considerably; the investment saving is 50 million RMB; the construction period shortening is half year.The construction of the RCC thin arch dam of LHP shows that the RCC dam can replace conventional concrete dam in most cases. It also provides successful experiences for the RCC dam construction in large temperature variation and high seismic area. Therefore, the financial and social benefits are obvious by these researches and practices.更多还原