三峡工程大坝后期冷却通水最佳结束时机研究

介绍三峡工程大坝后期冷却通水的计算方法和通水方案，并以泄洪坝段为例，根据混凝土无内热源的热传导方程和三峡工程具体情况确定的初始条件，推导出适合三峡工程的混凝土降温时间公式和对应的温度曲线、混凝土冷却中的任一时间的平均温度和对应的温度曲线，为掌握闷温时机、及时提供接缝灌浆部位提供了可靠依据。

Determination of Optimum Ending Time of Water Circulation for Later Cooling of Dam in Three Gorges Project

A calculation method and a watering scheme for later cooling of the dam by water circulation in the Three Gorges Project are described in this paper. In addition, with a flood discharging section of the dam as an example, formulas for determination of time of concrete temperature drop and its corresponding temperature curve, and the average temperature at any time during the cooling of concrete and its corresponding temperature curve are deduced based on the initial conditions determined by the heat conduction equation for concrete without internal heat source and practical conditions of the Three Gorges Project, providing reliable data for handling of temperature keeping time and determination of locations for joint grouting.