雨水管道坡度不够怎么处理,现场施工经验

雨水管道坡度不够,短期看可能还能排水,真正下大雨或者有沉降以后问题就出来了。我见过一个停车场排水项目,管子埋完回填了,试水才发现末端流速很慢,后来只能局部挖开重做,比前面多检查一次贵太多。 做这类活我会先盯 invert elevation,不只看管顶标高。沟槽开好后用 laser level 复核几个关键点,尤其是 catch basin 到主管、主管到出口这几段。垫层如果没压实,管子当时坡度对,回填压下去以后也会跑。 现场还要注意弯头和接井位置。图纸上看着很顺,实际遇到已有管线或结构边界,管线绕一下坡度就可能不够。能提前调整就提前报,别等管子放进去以后靠"差不多"硬凑。排水工程很多返工不是不会做,是前面标高没追到底。

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