地下埋藏式压力钢管无内支撑安装变形分析

发布时间：2017-12-28 10:45

本文关键词：地下埋藏式压力钢管无内支撑安装变形分析　出处：《水力发电》2016年12期 　论文类型：期刊论文

【摘要】：以某水电站超大型地下埋藏式压力钢管为研究对象,分别考虑钢管两侧混凝土同时水平上升和存在高差浇筑两种情况,对钢管在混凝土浇筑阶段的受力变形进行有限元数值分析。计算结果表明,两种浇筑方式下内外支撑的布置对钢管变形规律影响不大,最大变形出现在钢管底部,数值上均满足规范对钢管变形的控制要求;内支撑和拉杆的轴向应力较小,在减小钢管变形上的作用不大。因此,建议取消内支撑而保留拉杆作为防止钢管产生移位的固定措施,以顺利实施钢管自动化焊接、安装和混凝土浇筑,提高施工效率,节省工程投资。
[Abstract]:Taking a super large underground buried penstock of a hydropower station as the research object, considering the two cases of concrete horizontal rise and high difference pouring at the same time, the finite element numerical analysis of the stress and deformation of the steel pipe in the concrete placement stage is carried out. The calculation results show that the support of the two kinds of layout inside and outside of steel pipe deformation pouring method has little effect on the maximum deformation occurs on the bottom of steel pipe, the specification requirements of the control of deformation of steel tube can meet the numerical value; axial stress and inner support rod in small, little effect on the deformation of steel tube decreases. Therefore, it is recommended to cancel the inner support and retain the pull rod as a fixed measure to prevent the steel pipe from shifting, so as to smoothly carry out the automatic welding, installation and concrete placement of the steel pipe, so as to improve the construction efficiency and save the project investment.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;成都阿朗科技有限责任公司;
【基金】：国家自然科学基金资助项目(51409194)
【分类号】：TV732.41
【正文快照】： 0引言随着水电事业的发展,大直径高水头的压力钢管得到越来越多的应用。如三峡水电站的引水压力钢管直径达到12.4 m,向家坝水电站右岸地下厂房引水隧洞压力钢管直径最大为14.4 m[1]。这类巨型压力钢管往往技术含量高、施工强度大且质量要求高,目前根据《水电水利工程压力钢

【参考文献】