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The requirements of foundation for Composite Manhole Cover

The requirements of foundation for Composite Manhole Cover

  • 2018/07/06

The composite manhole cover mainly uses polymer as the base material, mainly adopts unsaturated resin as the main chemical raw material, and composites various materials. The high temperature and high pressure one-time molding technology has high polymerization degree, high density and good impact resistance. And tensile strength, with wear resistance, corrosion resistance, no rust, maintenance-free. Before the installation of the composite manhole cover, the foundation of the manhole cover should be neat and sturdy. The inner diameter and the length and width should be determined according to the size of the manhole cover. The following describes the requirements for installing a composite manhole cover to the foundation:

When the manhole cover is installed on the cement pavement, it is necessary to pay attention to the concrete pouring on the masonry of the wellhead, and to build a concrete protection ring on the periphery for maintenance for about 10 days. In order to maintain the beauty of the manhole cover and the clarity of the writing and pattern, it is necessary to pay attention to not to soil the manhole cover when pouring asphalt and cement on the road surface.

When the composite manhole cover is installed on the asphalt pavement, care must be taken to avoid the construction machinery directly crushing the manhole cover and the well seat to avoid damage. When the pavement is integrally cast, a hole slightly larger than the well seat should be reserved on the road surface and placed after the asphalt is laid.

The advantage of the manhole cover is that it is not enhanced by the steel skeleton, but is enhanced by the glass fiber composite, and belongs to the GRC type product. In the case of rising steel prices, there are more unaffected advantages. Because it does not contain a little iron, it is more burglar-proof than stone-plastic and fiber-consolidated manhole covers. It can carry more than 40 tons of vehicles. The comprehensive performance is between the stone plastic manhole cover and the concrete manhole cover, which is better than concrete; it can be applied to the occasions with high requirements on the manhole cover technology. The curing speed is several times faster than that of fiber concrete. It can be demolded in 8 hours. If it is produced in three shifts, it can be demolded three times in 24 hours. Although the mold dosage is more than that of stone plastic, it can only be reduced by about 1/6 of the fiber concrete manhole cover. Mold investment. With an annual output of 10,000 sets of manhole covers, only 10 sets of molds are needed.

In the continuous improvement and renewal of the composite manhole cover, the indicators have exceeded the industry standard of the Ministry of Construction, and basically reached the national standard, which is unmatched by other molds (such as rubber molds, plastic molds, and glass steel molds).

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