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[VIP第9年] 指数:5
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施工时要在预埋管口预先用塑料纸或其它材料封口，以防止混凝土浇捣时混凝土漏入预埋管中，造成预埋管堵塞；基础浇捣后，基础面必须要高于地平面5MM～10MM；混凝土必须要养护一段时间，以确保混凝土能达到一定的安装强度。
Construction in embedded pipe mouth sealed with plastic or other materials in advance, in order to prevent the cast concrete when leakage into the embedded pipe blockage caused by embedded pipe;Cast foundation, foundation surface must be higher than the ground plane 5 mm to 10 mm;Concrete must be maintained for a period of time, to ensure that the installation of the concrete can achieve a certain strength.
