三峡工程水电站压力管道伸缩节设置论证  

Examination on Design and Installation of Flexible Connectors of Penstock in the Power Plant of Three Gorges Project

作　　者：刘宁[1] 

机构地区：[1]水利部长江水利委员会

出　　处：《中国水利》2001年第6期54-55,共2页China Water Resources

摘　　要：为适应厂坝间相对变位,坝后式厂房引水压力钢管通常设置伸缩节。三峡工程压力钢管直径12.4m,设置 伸缩节造价高,制造、安装困难,运行期止水等技术问题突出。为此设计对伸缩节设置与否做了深入的论 证研究,对坝体、厂房混凝上浇筑,温度应力,钢管垫层,以及蜗壳保压浇混凝土等进行了仿真计算后,进 一步论证水电站压力管道可取消伸缩节。In order to fit relative variable spaces between the power plants, flexible connectors of penstocks are commonly installed for water diversion in a dam-rear power plant. Since the diameter of penstock of the Three Gorges power plant is 12.4 m, it results in a high cost of installing flexible connectors and causes difficulties of manufacturing and installation and problems with water seal during operation. Thus, careful studies are carried out on whether flexible connectors should be designed or installed. Through simulated calculations on dam body, concrete pouring of power plant, temperature stress, steel pipe bedding, strike and compression and pouring concrete for a spiral case, it proved that flexible connectors of penstocks may be omitted in the power plant.

关 键 词：伸缩节 压力钢管 三峡工程 伸缩节 垫层管 

分 类 号：TV732.4[水利工程—水利水电工程]