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观察过从屋檐到地面的排水管吗?其实也蛮长的一段,冬天很冷时也结冰堵塞硬邦邦,但从未爆过,因为两端开放不封闭,压力被释放掉了,家里水管只要常用水,管内压力多少都有释放机会,除非被冻的管段太长,压力传递不及。
原理与水泥地需要有伸缩缝是一样的,没有伸缩缝就会变形/断裂,水管内在一定长度内的水有流动/张弛空间,压力就能释放出来,而管道上开关太多且都处于关闭状态爆管风险就越大。而如果没人用水(管内压力状况没有改变机会),则风险也就加大,这种情况多见于冬天无人居住的房子。
-see1see(Isee); 10-15 {476} (#16334114@0) +5