CN2443045Y

CN2443045Y - Special steel reinforced concrete manhole cover

Info

Publication number: CN2443045Y
Application number: CN 99204483
Authority: CN
Inventors: 杨振林
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-12
Filing date: 1999-03-12
Publication date: 2001-08-15
Anticipated expiration: 2009-03-12

Abstract

The utility model relates to a special steel reinforced concrete manhole cover which is in a plane structure which uses the surface load of an automobile wheel for acting on a manhole cover. A circular manhole cover is made of radial steel reinforcement and tangential steel reinforcement and C40 concrete, and the light duty (400 kilograms per square meter) and the heavy duty (an automobile-15 tons) of the manhole cover are calculated by the X/R division point according to the national standard picture of 1966 year. The utility model has the advantages of large bearing capacity, corrosion resistance, stealing prevention and low cost, and the utility model can not result in brittle failure when gets accidental impact. The utility model can be used in new construction, and can be used for replacing cast iron manhole covers of water supply, drainage, fire hydrants and heat supply networks which are easy to lost under the condition that cast iron bases are not lost.

Description

The special reinforcing steel concrete manhole cover

The utility model relates to a kind of special reinforcing steel concrete manhole cover, can substitute existing casting iron well lid and prevent loss on function of use.

What use in the engineering at present all is the casting iron well lid that forms with hot method casting as raw material with irony, and iron-holder Da Yi loses.New pattern manhole cover is to be that main material is furnished with the cold special reinforcing steel concrete manhole cover that forms of casting of a small amount of fine steel rib with the concrete, and steel content is low to be difficult for losing.

The purpose of this utility model provides a kind of special reinforcing steel concrete manhole cover, it is to act on that plane structure on the well lid calculates the arrangement of reinforcement of each point with corresponding formulas and the special reinforcing steel concrete manhole cover made according to " national plumbing standard in 1966 is divided light-duty (400 kilograms/square metre) and heavy type (vapour-15 ton) cast iron cover production design standard " with the area load of an automobile wheel load, it is except that satisfying every function of use, especially solved the problem of losing, and reduced cost and economize on the use of funds.

The utility model well lid is realized with following technical scheme, this round manhole cover, it is characterized in that the spot welding net that bottom is made of to reinforcing bar in length and breadth spot welding steel mesh reinforcement of cutting, radially forming and upper strata, leaving certain space between two nets rises with short muscle pad, divide and what time be welded into skeleton, put it into band steel and bend in the circular external mold that forms cast C ₄₀Concrete and making.

The beneficial effects of the utility model: 1, because the utility model well lid design thickness is limited in 50 millimeters, with former casting iron well lid thickness basically identical, interchangeability is good.2, this well lid is to be that raw material is made with the concrete, and steel content is low can be antitheft, stops the road killer.3, the utility model is to be that its cost of raw material is lower by about 1/3 than casting iron well lid with the concrete, and economic benefit is considerable.

Accompanying drawing:

Fig. 1, special reinforcing steel concrete manhole cover plan view;

Fig. 2, bottom layer of the reinforcing steel net allocation plan;

Fig. 3, the top mat allocation plan;

Fig. 4, band steel external mold figure;

Fig. 5 is the 1-1 sectional drawing of Fig. 1.

Accompanying drawing has provided the best round manhole cover of a kind of special reinforcing steel concrete of the utility model.Fig. 1 is by upper strata and bottom layer of the reinforcing steel net, leaves enough spaces between two nets and plays branchs with short muscle pad again and what time be welded into skeleton, puts it into then in the external mold with the band steel making, and C casts ₄₀Concrete has just been made round manhole cover.Well lid is provided with open hole 8; Air-vent 9 and purposes sign 10.Fig. 2 has provided tangential reinforcing bar 1 of bottom and reinforcing bar 2 radially, and its point is welded into net.Fig. 3 has provided upper strata longitudinal reinforcement 3 and transverse reinforcement 4, and its point is welded into net.Fig. 4 bends circular external mold and the concrete anchor rib 6 that forms with band steel 5.Fig. 5 is the sectional drawing of the 1-1 of Fig. 1, and top mat and bottom layer of the reinforcing steel net play the skeleton and the C of formation with short muscle pad as can be seen ₄₀Concrete seven.

Claims

1. special reinforcing steel concrete manhole cover, it is characterized in that round manhole cover: bottom is welded into the spot welding net that net and upper strata are formed to reinforcing bar in length and breadth by reinforcing bar of cutting, radially forming and point, two nets are welded into skeleton, put it into band steel and bend in the circular external mold that forms cast C ₄₀Concrete is made.

2. special reinforcing steel concrete manhole cover according to claim 1 is characterized in that described bottom layer of the reinforcing steel net and top mat, leaves enough spaces between net and plays branch with short muscle pad and what time be welded into skeleton.