在抢修干管时,如何使停水时间缩至最短而尽快供水,这是城市供水部门应考虑的问题。我公司工人同志在实践中学习外地经验,在自应力水泥中加水玻璃(Na_2SiO_3),使接口养护期大大缩短。如在抢修φ900毫米引水管时(压力2公斤/厘米~2),使用此种早强水泥,仅3个小时就通水了。在抢修φ100毫米干管时(压力3公斤/厘米~2),仅1.5小时就通水了。而未使用早强水泥前养护期要24小时。实践证明使用 When repairing dry pipes, how to minimize water stoppage time and supply water as soon as possible is a problem that should be considered by the urban water supply department. Our company’s workers’ comrades learned from their experience in practice and added water glass (Na_2SiO_3) to the self-stressed cement, which greatly shortened the maintenance period of the interface. For example, when repairing a φ900 mm water diversion pipe (pressure 2 kg/cm2), this type of early-strength cement can be used for water in only 3 hours. When repairing a φ100 mm trunk (pressure 3 kg/cm~2), water flowed in only 1.5 hours. Without the use of early strength cement before the maintenance period of 24 hours. Proved to use