厚倒丁字型高强度混凝土墩墙施工期水管冷却温控效果研究
发布时间：2019-04-21 06:42
【摘要】：为了制定合理的水管冷却方案,基于ANSYS有限元仿真方法,计算了厚倒丁字型高强度混凝土结构在无水管冷却、单排水管冷却及双排水管冷却工况下的温度、应力变化规律,探讨其施工期水管冷却温控防裂效果。结果显示:采用单排或双排水管冷却方案后,高强度混凝土墩墙内外温差分别降低了42%和90%,外表面早期应力分别减小了40%和80%以上,内部后期应力分别减小了20%和75%以上。可见,双排水管的冷却效果明显优于单排水管,可有效避免混凝土墩墙开裂风险。结果表明,在厚倒丁字型高强度混凝土结构施工期,冷却水管布置应较密集,水管间距以1 m以内为佳。
[Abstract]:In order to make a reasonable cooling scheme of water pipe, the temperature and stress of thick inverted T-shaped high strength concrete structure under the conditions of no pipe cooling, single drain pipe cooling and double drainage pipe cooling are calculated based on the ANSYS finite element simulation method. The effect of water pipe cooling temperature control and crack prevention during construction is discussed. The results show that the temperature difference between inside and outside of the high strength concrete pier wall decreases by 42% and 90% respectively, and the early stress on the outer surface decreases by more than 40% and 80% respectively after adopting the cooling scheme of single row or double drain pipe. The internal post-stress decreases by more than 20% and 75% respectively. It can be seen that the cooling effect of double drains is obviously better than that of single drains, which can effectively avoid the risk of concrete pier wall cracking. The results show that during the construction period of thick inverted T-shaped high strength concrete structure, the arrangement of cooling pipes should be dense and the spacing of pipes should be less than 1 m.
【作者单位】： 浙江省水利水电勘测设计院;
【分类号】：TV544
[Abstract]:In order to make a reasonable cooling scheme of water pipe, the temperature and stress of thick inverted T-shaped high strength concrete structure under the conditions of no pipe cooling, single drain pipe cooling and double drainage pipe cooling are calculated based on the ANSYS finite element simulation method. The effect of water pipe cooling temperature control and crack prevention during construction is discussed. The results show that the temperature difference between inside and outside of the high strength concrete pier wall decreases by 42% and 90% respectively, and the early stress on the outer surface decreases by more than 40% and 80% respectively after adopting the cooling scheme of single row or double drain pipe. The internal post-stress decreases by more than 20% and 75% respectively. It can be seen that the cooling effect of double drains is obviously better than that of single drains, which can effectively avoid the risk of concrete pier wall cracking. The results show that during the construction period of thick inverted T-shaped high strength concrete structure, the arrangement of cooling pipes should be dense and the spacing of pipes should be less than 1 m.
【作者单位】： 浙江省水利水电勘测设计院;
【分类号】：TV544
【参考文献】
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