CN2428519Y

CN2428519Y - Over-weight shaped-sheel fiber-concrete examination manhole cover

Info

Publication number: CN2428519Y
Application number: CN 00205393
Authority: CN
Inventors: 蒋天涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-16
Filing date: 2000-03-16
Publication date: 2001-05-02
Anticipated expiration: 2010-03-16

Abstract

The utility model relates to an over-weight type steel fiber concrete inspection manhole cover which is composed of a panel, reinforcing ribs, reinforcing hoops and supporting base reinforcing angle steel. The utility model is characterized in that the over-weight type inspection manhole cover is circular, and the lower part of the panel is provided with the radial reinforcing ribs. A three-dimensional reinforcing space steel rib framework is matched with the manhole cover, and the circumferential edge of the manhole cover is provided with the reinforcing hoops. The ends of the radial reinforcing ribs are provided with the supporting base reinforcing angle steel. Compared with the existing heavy cast iron inspection manhole cover which satisfies automobile-15 load use requirements, the inspection manhole cover decreases the weight 30% or so, and reduces the price more than 45%. The utility model can satisfy automobile-25 load use requirements. The shock resistance is good, and the utility model is not easy to corrode and lose. The utility model improves the bearing capacity near 2 times than the carrying capacity of a reinforcing type fiber mortar or fiber concrete heavy inspection manhole cover, and the utility model can be widely used as inspection manhole covers at various roads, fields or areas.

Description

Superduty steel fibrous concrete manhole well lid

The utility model belongs to a kind of manhole well lid of municipal engineering.

Municipal engineering manhole well lid generally is cylinder iron to make.Form by panel and ribs, be garden shape.Ribs is that groined type or radiation are arranged.There is following shortcoming in it: the first will be used a large amount of cast irons, the structure heaviness, and also every all need be made sand mold cast, complex process, and the cost height, production environment is abominable; The 2nd, cast iron is fragile material, and shock resistance is poor; It three is easy corrosions; It four is stolen easily.Other has the heavy manhole well lid (patent No. 94247943.2) of a kind of enhanced fiber mortar and fibrous concrete, and it can only bear the load of 15 tons heavy automobiles (be called for short vapour--15), the superduty vehicle (20 tons heavy automobiles, be called for short vapour--20; 25 tons heavy automobiles, be called for short vapour--25) start the location, damage easily because the hardness of the intensity of its ribs and ribs bearing and shear resistance are not enough, particularly when laying out-of-flatness, the part ribs is stressed, and this bearing is destroyed in advance, and can not use.

The purpose of this utility model provides a kind of superduty steel fibrous concrete manhole well lid, strengthens angle steel by panel, ribs, reinforcement hoop and bearing and forms.Three-dimensional enhancing space cage of reinforcement is set in panel and ribs and binds round connection with reinforcement.Simultaneously, set up at bearing place, the end of radiation rib strengthen angle steel and with strengthen hoop and connect, improving its partial pressing and shear resistance, thereby improve the integrated carrying ability of well lid.This manhole well lid has overcome the shortcoming and defect of cast iron manhole well lid and enhanced fiber mortar and the heavy manhole well lid of fibrous concrete, has improved bearing capacity greatly.Be applicable to and make superduty manhole well lid.

Superduty steel fibrous concrete manhole well lid of the present utility model, strengthening angle steel by panel, ribs, reinforcement hoop and bearing forms, it is characterized in that: the superduty manhole well lid of being made by steel fibrous concrete is a garden shape, be provided with 6 in shape panel bottom, garden, be radial arrangement, longitudinal section is parabolic ribs.Configuration parabolic shape reinforcing bar in the ribs.Reinforcing bar in the panel and the reinforcing bar in the ribs strengthen the space cage of reinforcement with the three-dimensional that stirrup unifies.The periphery of well lid is provided with strengthens hoop.The bearing place, end of radial rib is provided with the reinforcement angle steel.

Described reinforcement hoop is made garden shape hoop with band steel, burn-ons or do not weld with well lid and water the dowel that builds up integral body in hoop inside.

Described steel fibre can be the steel fibre of producing with shearing method; Steel fibre that the molten method of taking out is produced or the steel fibre of producing with the cut-out of thin steel (iron) silk etc.

Superduty steel fibrous concrete manhole well lid of the present utility model, because the three-dimensional space cage of reinforcement that strengthens of preparation in the well lid, the well lid periphery is provided with strengthens hoop, the bearing place, end of radial rib is provided with the reinforcement angle steel, can satisfy vapour--the instructions for use of 25 loads.Every heavily about 45 kilograms, about 100 yuan of price.Than original vapour--every of the heavy casting iron well lid heavy 68 kilograms (seeing former national standard figure S147) that 15 loads use, weight reduces more than 30%.About 180 yuan of every price, price reduces more than 45%.Shock resistance is good, and is not perishable, do not lose.Improve two class of loading of supporting capacity than enhanced fiber mortar or the heavy well lid of fibrous concrete, can be widely used in the manhole in different kinds of roads, place or area.

Below in conjunction with drawings and Examples superduty steel fibrous concrete manhole well lid is further described.

Fig. 1 is a vertical view of the present utility model.

Fig. 2 is a sectional drawing of the present utility model.

As shown in the figure, the panel of well lid 1., its back side has 6 ribs 2. to be radial arrangement.The longitudinal section of rib is parabola shaped.Reinforcing bar and the reinforcing bar in ribs of the panel of well lid in 1. strengthens the space cage of reinforcement with the three-dimensional that 3. stirrup unifies.Strengthen hoop and 4. wale panel.Strengthen angle steel and 5. be located at the end bearing of radial rib.

The size of well lid is general wide to be φ 600mm--φ 800mm; The thickness of well lid can be 40mm--60mm; The ribs height can be 70mm--150mm, and wide is 30mm--70mm.

The making of well lid, can select the match ratio of steel fibrous concrete according to the material that uses, for example can adopt the 525# ordinary Portland cement by cement: sand: stone=concrete of 1: 2: 1.5 adds the steel fibre of volume of concrete 2% again, mixes and stirs cast by the 0.40--0.50 water/binder ratio.

Superduty steel fibrous concrete manhole well lid of the present utility model, supporting capacity stipulates that than the heavy well lid of the national universal standard figure S147 instructions for use of vapour-15 load improves two grades.Satisfy vapour--the instructions for use of 25 loads.Result of the test is as shown in the table:

Load 10 20 30 40 50 60 70 80 90 100 110 120 130 (kn)
Load 10 20 30 40 50 60 70 80 90 100 110 120 130 (kn)	Accumulative total is out of shape bearing and is out of shape 13 17 22 30 38 47 58 71 84 97 115 (0.01)

When applying total load 120KN in the 15 cm diameter scopes of well lid center, maximum distortion is 0.97mm, and crack width is less than 0.2mm.Rupture load surpasses 120KN.The design load of vapour-15 requires to be 60KN that actual bearer ability of the present utility model is a vapour--more than 2.0 times of 15 load requirements, improve the nearly twice of supporting capacity than 94 2 47943.2 utility model patent well lids.Be extensive use of and can be about substantial contribution of country and cast iron materials, can avoid losing traffic and the human casualty accident that brings simultaneously because of well lid.

Claims

1, a kind of superduty steel fibrous concrete manhole well lid, strengthening angle steel by panel, ribs, reinforcement hoop and bearing forms, it is characterized in that: the superduty manhole well lid of being made by steel fibrous concrete is a garden shape, in the panel bottom 6--8 bar is set, be radial arrangement, longitudinal section is parabolic ribs, configuration parabolic shape reinforcing bar in the ribs; Reinforcing bar in panel in configuration reinforcement and the ribs strengthens the space cage of reinforcement with the three-dimensional that stirrup unifies; The reinforcement hoop that the periphery setting of well lid is made by band steel; The end of radiation ribs is provided with and strengthens the bearing reinforcement angle steel that hoop is connected.