Covers the brick masonry shall be in accordance with design institute design covers the size to determine the diameter or length * width, radius (such as according to the real construction best) and corresponding reference standards. Puzzle wells must pay attention to the wellhead with inner wells grate covers the inner diameter of the line, installed covers should be flat and pavement.
Cement road surface manhole seat installation, in brick masonry of the wellhead with C25 concrete pouring 20cm thick beam smoothing, must keep well four really, overall smooth, not loose and the manhole cover casting wide 40cm concrete protective ring (if the cement pavement, casting width is 20cm concrete protective ring, and reinforced by strengthening) maintenance period in more than 10 days.
When installing the cover on the asphalt pavement, be sure to pay attention to avoid the construction machinery to direct rolling of the well seat, in the overall pavement casting should be on the road reserved hole slightly larger than a well seat, placed in the asphalt after. (the concrete pavement should be two stones puwan after grinding installation) to ensure quality to prolong the service life of resettlement covers.
In order to maintain the beautiful appearance cover, surface patterns and handwriting clear, in the construction of asphalt pavement application in manhole cover or waste oil brush cover covering a thin metal, prevent the asphalt oil spray on the well cover; in the cement concrete pavement construction. Application of plastic film of the manhole cover, to prevent the waterproof mortar contaminated with the surface of the manhole cover, injury pattern on the surface, writing, can also be the day of the construction after the water covers the surface of clean water.
Concrete or asphalt will well base casting after laying, should be timely open the lid cleaning, avoid asphalt mortar or will check manhole cover seat and poured into a whole, so as not to affect the future open。
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