三峡工程电站尾水管顶板整浇方案温度应力研究

Study on Thermal Stress of Monolithic Pouring Scheme for Draft Tube Roof of TGP's Power Plant

为了降低三峡电站厂房尾水管施工中出现的温度应力，原设计推荐采用传统的设置“封闭块”方案；但该方案施工进度慢。本文介绍了设置和取消“封闭块”两种工况的应力仿真计算结果，提出了取消“封闭块”，实施整浇顶板的建议。

For reducing the thermal stress in monolithically poured draft tube roof of TGP's power plant emerging in construction, a conventional “confined block” scheme was recommended in the original design, but the construction progress of this scheme is rather slow. The results of two simulated calculation with and without “confined block” are represented in the paper. A suggestion of implementing monolithical pouring without “confined block” is proposed.