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混凝土重力坝用横缝沿坝轴线将坝体分割成独立的坝段,在运用期间,当周围介质温度发生变化时,各坝段可自由变形,以免产生过大的拉应力,从而出现有害裂缝,保证坝体安全.拉应力随温度伸缩缝间距的减小而减小.但是,若坝段长度很小,势必分缝较多,这是不经济的;如果坝段过长,则可能出现裂缝,对建筑物安全运用极为不利.如何合理确定温度缝间的距离,是混凝土重力坝设计中重要课题之一.本文试就确定混凝土重力坝温度缝间距的计算方法作一些探讨.
Concrete gravity dam with transverse joints dam along the dam axis will be divided into independent dam segment, during use, when the surrounding medium temperature changes, the dam can be free to deformation, so as to avoid excessive tensile stress, resulting in harmful cracks , To ensure the safety of the dam body.The tensile stress decreases with the decrease of the temperature expansion joint spacing.However, if the dam length is small, it is bound to have more subdivisions, which is uneconomical.If the dam is too long, it may appear Cracks, which are extremely unfavorable to the safe use of buildings.How to determine the distance between the temperature joints reasonably is one of the most important topics in the design of concrete gravity dam.This paper tries to make some discussions on the calculation method of determining the temperature gap between concrete gravity dams.