An impact-resistant well grate and manhole cover

Abstract

The invention discloses an impact-resistant water grate, and an impact-resistant manhole cover. The impact-resistant water grate and the impact-resistant manhole cover comprise a concrete main body, and carbon fiber gridding cloth used for covering the bottom of the concrete main body; the concrete main body is composed of, by weight, 1 to 1.2 parts of cement, 1.2 to 1.4 parts of fly ash, 0.6 to 0.8 part of sand, 0.001 to 0.002 part of a thickening agent, 0.009 to 0.01 part of a water reducing agent, 0.3 to 0.4 part of water, and polyvinyl alcohol fiber; the volume amount of polyvinyl alcohol fiber accounts for 1 to 2% of the total volume of the concrete main body. The impact-resistant water grate is prepared from the PVA fiber concrete material, so that the carrying capacity of the impact-resistant water grate is improved, and impact resistance is improved effectively because of the excellent strain hardening performance and impact resistance of the PVA fiber concrete material; and in addition, the PVA fiber concrete material possesses extremely high durability, so that the service life of the impact-resistant water grate is prolonged.

Description

technical field [0001] The invention belongs to the field of drainage facilities for public transportation, and in particular relates to an impact-resistant well grate and a well cover. Background technique [0002] At present, most of the well grates commonly used in urban street and highway drainage projects are made of cast iron or ordinary concrete. Although they have high strength and strong compression resistance, the well grates made of cast iron are relatively brittle and have low impact resistance. , and the current vehicle overload is serious, the original design standard is prone to damage such as well grate breaking, and the loss phenomenon is also serious when it is made of cast iron; it is made of ordinary concrete, which is also relatively brittle, which greatly shortens the service life. At the same time, since most of the well grates are installed on the side of the road, when the cart stops in an emergency, the impact performance on the well grate itself is...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the well grates commonly used in urban street and highway drainage projects are made of cast iron or ordinary concrete. Although they have high strength and strong compression resistance, the well grates made of cast iron are relatively brittle and have low impact resistance. , and the current vehicle overload is relatively serious, the original design standard is prone to damage such as well grate breaking, and the loss phenomenon is also serious when it is made of cast iron; it is made of ordinary concrete, which is also relatively brittle, which greatly shortens the service life

At the same time, since most of the well grates are installed on the side of the road, when the cart stops in an emergency, the impact performance on the well grate itself is relatively large, and the well grates made of cast iron and ordinary concrete are relatively brittle and easily broken under a large impact load cracks, causing great safety hazards to pedestrians and non-motor vehicles

[0003] Although it has been disclosed in the prior art to use GRC materials to prepare well covers and well grates, the prepared well grate can solve the problem that the well grate is easily broken to a certain extent, but it is still easy to break under the reciprocating huge impact load of the passing vehicles. , causing a reduction in service life

[0004] To sum up, in the prior art, there is still no effective solution to the problem that well grates are easily broken under the action of reciprocating large impact loads

Images