Abstract: This paper introduces a variety of temperature effects on concrete dam operation by studying some cases. Those effects can result in dam cracks,cracks under construction enlarged and dam surface destroyed by freeze-thaw,deep concrete destroyed by frost heave. It not only influenced dam operation age, but also menaced dam safety operation. If we have carried out controlling dam temperatures at its operation (included blocking dam gallery and holes, water-logging at ogee spillway) to reduce temperature change range,thereby improving dam body stress condition and decreasing the range and degree of freeze-thaw and frost heave.

摘要： 本文通过工程实例介绍温度在混凝土坝运行期间的各种影响和作用,它能使坝体产生裂缝,使施工期出现的裂缝扩展;还能使混凝土表面产生冻融破损,使混凝土深层产生冻胀破坏。这不仅影响大坝的使用寿命,而且威胁大坝的安全。若对大坝运行期间的温度加以控制(如对大坝廊道和孔洞进行封堵、溢流坝反弧段积水等),则可减小温度变化幅度,从而改善坝体应力状态和减少冻融、冻胀的程度及范围。