江垭碾压混凝土重力坝运行期温度特征分析

Analysis of Temperature Characteristics of the Jiangya RCC Gravity Dam during Operation Period

江垭碾压混凝土重力坝最大坝高131m,采用风冷骨料加冷却水等控制入仓温度、低温季节浇筑、高温季节停止施工、坝体缺口度汛的温控措施及施工方式,并在5、7、8号坝段设置观测断面,布置温度、应力、渗压渗流、变形等观测设备。根据坝体温度、应力观测资料分析大坝温度特征,揭示其温度变化函数关系规律,为优化大坝设计和工程运行提供科学依据。

The Jiangya RCC gravity dam has a max. height of 131 m; the concrete was placed with aggregate air-cooled and water chilled in low temperature seasons to control temperature rise. No placement in high temperature seasons was made. In the flood seasons, the notches on the dam body were left open for flood control purpose. The Sections Nos.5, 7 and 8 were used as instrumentation sections which were installed with instruments and devices including temperature meters, stress indicators, piezometers and deformation indicators. The information about temperature and stress characteristics obtained this way was used to study Characteristics of dam temperature and functions between temperature variations, so as to carry out optimization of dam design and operation.