论文部分内容阅读
一、概述丹江口水利枢纽宽缝重力坝采用柱状分块法浇筑。在挡水前必须对纵横接缝灌浆以使大坝连成整体。后期冷却是指在没有内热源情况下的混凝土坝体的降温措施。其主要目的是:保证接缝灌浆的有关坝体,在预定的灌浆时间内达到并维持在许可的灌浆温度范围以内,削减混凝土后期的内外温差(丹江口大坝≯20℃),调节已灌缝相邻坝块的温差,以免在已经灌浆的接缝上产生危害性的应力。丹江口大坝冷却供水系统,主要是按后期冷却
First, an overview Danjiangkou Water Conservancy Wide-slit gravity dam using column block method pouring. The vertical and horizontal seams must be grouted to keep the dam integrated as a whole before watering. Late cooling refers to the cooling measures in concrete dam body without internal heat source. Its main purpose is: to ensure that the grouting of the joints of the dam, within the expected filling time to reach and maintain within the allowable grouting temperature range, reduce the internal and external temperature difference of concrete (Danjiangkou dam ≯ 20 ℃) Adjacent blocks of the temperature difference, in order to avoid the joints have been grouted to produce hazardous stresses. Danjiangkou dam cooling water supply system, mainly according to the late cooling