碾压混凝土重力坝浇注温度控制及防裂措施
Casting Temperature Control and Crack Prevention Measures For RCC Gravity Dam
杨方1
作者信息
- 1. 广东省建筑工程集团股份有限公司,广东 广州 511300
- 折叠
摘要
文中通过利用Anssys软件建立重力坝三维有限元模型,模拟分析坝体混凝土的温度响应及应力响应,研究冷却水管各因素对坝体温度的影响,确定合理的冷却水管布置方案.结果表明,水管间距越大、水管长度越长、水管流量越大,重力坝混凝土温度越高,冷却效果较差.综合降温效果以及工程造价,最终确定冷却水管间距为1.5 m×1.5 m,冷却水管长度为200～250 m,冷却水管水流速为15～20 m3/d.为提出合理的碾压混凝土重力坝温度控制及防裂措施奠定基础.
Abstract
The three-dimensional finite element model of gravity dam was established by using Anssys software to simulate and analyze the tem-perature response and stress response of concrete in the dam body,and the influence of various factors of cooling water pipes on the temperature of the dam body was studied,and a reasonable cooling water pipe layout scheme was determined.The results show that the larger the water pipe spacing,the longer the water pipe length and the larger the water pipe flow,the higher the concrete temperature of gravity dam,and the worse the cooling effect.Comprehensive cooling effect and project cost,the final determination of the cooling water pipe spacing is 1.5 m×1.5 m,the length of the cooling water pipe is 200～250 m,the flow rate of the cooling water pipe is 15～20 m3/d.It lays a foundation for the reasonable temperature control and crack prevention measures of RCC gravity dam.
关键词
重力坝/碾压混凝土/数值模拟/温度响应/防裂措施/冷却水管参数Key words
Gravity dam/Roller compacted concrete/Numerical simulation/Temperature response/Anti-cracking measures/Cooling water pipe parameter引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据