摘要
溪洛渡水电站泄洪洞,断面大,流速高,衬砌混凝土标号高,一旦发生裂缝特别是贯穿性大裂缝,极易在运行期产生空蚀,严重影响运行安全。因此施工期温控防裂形势严峻。利用ANSYS软件模拟溪洛渡泄洪洞衬砌混凝土的施工过程,采用三维有限元法进行了温度与温度应力的仿真计算,分析其温度场和温度应力的发展过程和分布规律,研究通水冷却、降低浇筑温度等温控措施的温控效果,提出夏季衬砌混凝土施工的温控措施,为隧洞工程衬砌混凝土的设计与施工提供参考依据。
In Xiluodu Hydropower Station, if cracks occur in spillway tunnels, for large cross-sections, high-velocity, and high-grade concrete of lining, there will be a vulnerable cavitation erosion in operation time, which seriously affects the safety of operation. Therefore, taking measures in the construction period to prevent thermal cracking is of great importance. A simulation calculation of temperature and thermal stress is carried out by using a 3-D finite-element method. The computer program ANSYS is used to simulate the construction process of concrete lining of the Xiluodu Spillway. The development and distribution of temperature and thermal stress is analyzed and the effects of water-cooling , lower pouring temperature are studied. A suggestion on temperature control measures needed for hot weather construction is made. This study serves as a reference for the concrete design and construction.
出处
《中国农村水利水电》
北大核心
2009年第5期116-119,共4页
China Rural Water and Hydropower
关键词
混凝土衬砌
温度场
温度应力
有限元计算
ANSYS
concrete lining
temperature field
thermal stress
finite element calculation
ANSYS
