Rainwater manhole cover replacement method

After the original manhole cover on the road is removed, manual dredging will be carried out to remove all the collapsed shaft walls. Because the specifications of the original rainwater outlet are not uniform, it is necessary to cut off the parts around the rainwater outlet with a cutting machine. If the pavement near manhole and rainwater outlet is seriously damaged, the pavement should be re-poured. When breaking, cut off the part to be broken with a cutting machine first, and then break the concrete with a pneumatic pick, and the cutting edge should be straight.

2.

Drilling and pouring ① After cleaning the well and rainwater outlet, please ask relevant personnel for acceptance. After inspection, concrete can be poured. Steel formwork shall be used for concrete formwork, and the installation position of formwork shall be accurate and firm, and the joints shall be tight without slurry leakage. (2) when pouring to use internal vibrator vibration, near the edge of the template can't leak or less vibration, so as to avoid honeycomb pitting surface phenomenon after ripping. Cover plastic film and straw bag in time for maintenance. When pouring, a set of test blocks shall be made for each batch of concrete.

3.

After the base course of pavement pouring manhole cover is cleaned, concrete is poured. When pouring, a flat vibrator is used to ensure the compactness of concrete pouring.