CN2057186U

CN2057186U - Shell fabric reinforcement concrete manhole cover

Info

Publication number: CN2057186U
Application number: CN 89216550
Authority: CN
Inventors: 赵筠
Original assignee: URBAN ENGINEERING RESEARCH INST BM
Current assignee: URBAN ENGINEERING RESEARCH INST BM
Priority date: 1989-09-15
Filing date: 1989-09-15
Publication date: 1990-05-16

Abstract

The utility model relates to a shell steel fiber concrete inspection well cover for the well mouths of various pipeline inspection wells. The well cover of a shell structure is made of steel fiber concrete. The top surface of the cover is a plane, and the bottom surface of the cover is a parabola rotating surface. The cover and a supporting base are assembled and connected in a conical surface mode. The shell steel fiber concrete inspection well cover has the features of high bearing capacity, light weight, low cost, steel saving, simple production process, theft proof, etc.

Description

Shell fabric reinforcement concrete manhole cover

The utility model is a kind of housing steel fibrous concrete manhole cover, can be used on the well head of pipe manholes such as various pipelines such as upper and lower water, telecommunications, electric power, heating power, coal gas, fire-fighting, for administrative staff check and the usefulness of keeping in repair discrepancy.

Two kinds in the profile side of having of manhole cover and garden, its material mainly are cast iron, are individually steel concrete.No matter the manhole cover of what shape and material is formed by lid and bearing.Usually, the structure of well lid is that ribs is established in upper flat plate, bottom.The well lid of this form of structure is made as adopting concrete material, and its supporting capacity is lower, is difficult to guarantee the safety used, so extensively adopt cast iron materials to make.Yet at present cast iron materials is in short supply, and price is higher, and casting iron well lid loses phenomenon and occur repeatedly, and causes casualties easily or traffic accident, brings loss and harm for national wealth and personal safety.

Task of the present utility model mainly is at the problems referred to above, researchs and solves the bearing capacity problem of making manhole cover of steel fibrous concrete.Under the prerequisite that guarantees the well lid functional performance, change the well lid structure, designed shell structure.When the edge of this structure well lid was restrained, under the vertical load effect, what produce in the well lid mainly was compressive stress, and flexural stress is then very little.Thereby just in time make full use of the high advantage of manufacturing materials steel fibrous concrete compressive strength.So the supporting capacity of housing steel fibrous concrete well lid is very high, can reach more than three times of speedway specified load, can guarantee safe in utilization fully.

The steel fibrous concrete manhole cover of shell structure is formed (see figure 1) by lid (1) bearing (2) and drop handle (3), and its principal character is: the lid manufacturing materials is a steel fibrous concrete; The end face of lid is the plane, and the bottom surface is the parabola surface of revolution, and the lid center is thin, the edge is thick, and its form of structure is different from the common flat board and the well lid of ribs fully, and the manufacturing materials of bearing is a steel concrete, reinforcing bar along seat rings to layout.Lid is a taper surface with the contact surface that the bearing assembling is connected.The constraint type at lid edge has two kinds: 1. bearing constraint; 2. housing well lid edge is provided with steel hoop from constraint.

Housing steel fibrous concrete manhole cover of the present utility model, the supporting capacity height can guarantee safe in utilizationly, and the weight of lid is then suitable with light-duty casting iron well lid, and it is convenient to open.The lid center of shell structure is thin, the edge is thick, and the contact surface of Gu Gai and bearing is bigger, and the reliable cooperation degree of depth is arranged, when automobile crosses the problem that " race " and " sound " takes place Shi Buhui.Because lid mainly adopts cement concrete with the manufacturing materials of bearing, only consume a spot of reinforcing bar and steel fibre, compare with casting iron well lid, steel using amount can be saved more than 90%, cost of production then can reduce more than 60%, and the technology that generation is made is simple, equipment investment is few.In addition, this manhole cover can not be used for other purposes, and has fundamentally eliminated the inducement of stealing, further guarantees safe in utilization.

The sectional drawing of (Fig. 1) housing steel fibrous concrete manhole cover form of structure.

The vertical view of (Fig. 2) housing steel fibrous concrete manhole cover form of structure.

Accompanying drawing below in conjunction with embodiment illustrates mounting means of the present utility model:

Bearing (2) is placed on the well head of various pipeline manholes, makes the end face of bearing (2) equal with the road surface, then combines closely with ground surface material all around.To cover (1) by drop handle (3) then steadily is placed on the bearing (2).Because lid (1) and bearing (2) be for the assembling of taper surface is connected, and have the reliable cooperation degree of depth, guarantee between the two in conjunction with tightly with steady.Can pass through drop handle (3) according to inspection personnel's needs opens at any time.

Claims

A kind of housing steel fibrous concrete manhole cover, lid (1), bearing (2), drop handle (3) are arranged, it is characterized in that lid (1) has adopted shell structure, the end face of lid is that plane, bottom surface are the parabola surface of revolution, the lid center is thin, the edge is thick, and lid (1) is connected for the assembling of taper surface with bearing (2).