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西安市黑河引水工程的倒虹工程采用承插式预应力钢筋混凝土管道(以下称混凝土管),每节长5m,内径2m.承插式接头用φ34mm的O型橡胶圈密封。根据(电力建设施工及验收技术规范,(SDJ59—79)的要求,混凝土管安装完毕后,应逐节进行接头水压试验,试验压力为0.2MPa,恒压5min,不允许有渗漏现象。为此,我们对现行的几种水压试验装置方案进行了分析对比,目的是研究出一个简易可行的密封措施。
Inverted siphon project of Xi’an Heihe Diversion Project adopts prefabricated prestressed reinforced concrete pipe (hereinafter referred to as concrete pipe), each section length is 5m and inner diameter is 2m. Socket fitting is sealed with φ34mm O-ring rubber. According to the Technical Requirements for Construction and Acceptance of Electric Power Construction (SDJ59-79), after the installation of concrete pipe is completed, joint pressure test shall be carried out by sections, with the test pressure of 0.2MPa and constant pressure of 5min, no leakage is allowed. For this reason, we compared and analyzed several existing schemes of hydrostatic test devices, aiming to find out a simple and feasible sealing measure.