高拱坝混凝土二期冷却优化研究

利用数值仿真计算方法,在基本温控方案的基础上,进行了更细致的温控措施优化设计.为了达到技术上与经济上双优的目的,根据不同灌浆区的混凝土龄期、混凝土温升过程、封拱温度等,系统研究了在不同季节里、在不同高程上采取不同温控措施的可行性,得到了拱坝温度场与应力场的特征参数,为施工单位根据当时的特定需要,进行二期冷却或三期冷却提供了依据.

Research on Optimization of Second-Stage Cooling of High Arch Dam Concrete

Based on the basic temperature control scheme,an optimized design of temperature control measure has been carried out by using numerical simulation method.According to the concrete ages of different grout compartments,the concrete temperature rising process and the arching temperatures etc.,aiming at the optimization of technology and economy,the paper studies systematically the feasibility of applying different temperature control measures in different seasons and at different elevations;and obtains characteristic parameters of arch dam temperature fields and stress fields so as to provide a basis for construction units to implement second stage cooling or third stage cooling according to particular demand at that time.