CN204898732U

CN204898732U - Many arched well lid boards

Info

Publication number: CN204898732U
Application number: CN201520585108.1U
Authority: CN
Inventors: 卢国林
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-06
Filing date: 2015-08-06
Publication date: 2015-12-23
Anticipated expiration: 2025-08-06

Abstract

The utility model discloses a many arched well lid boards, including a well lid main structure body, the main structure body is the arcuation atress structure of reverse catenary in space or parabolic shape, just the main part comprises the hunch shell of upper portion roof, lower part outer lane and inlayer, it comprises reverse pot form casing or the arch rib structure that is radial distribution to encircle the shell, quote the mechanics notion that the hyperbolic is encircleed, encircle the shell or the arch rib bears pressure by the inlayer, encircles shell or arch rib and be the reverse catenary construction in space, and under the vertical load effect, the compressive stress only appears in hunch shell or arch rib, does not have the tensile stress, need not configuration rebar, the header field hollows out as far as possible more than encircleing shell or arch rib, also forms a plurality of arcuation structures, reduces the quantity of concrete material, alleviates structural weight simultaneously.

Description

How arched manhole cover plate

Technical field

The utility model relates to manhole cover plate designing technique, particularly relates to the how arched manhole cover plate of one.

Background technology

Manhole cover plate is widely used in the floor outlet of various underground pipeline, personnel are facilitated to keep in repair turnover, for adapting to various needs, various specification and classification are derived, due to the difference of force request, the material used is also different, has ductile iron, have concrete, also have macromolecule chemical material.Generally adopt plate ribbed structure in shape, rib is wherein that bearing larger pulling force, is the stressed key position of whole manhole cover plate mainly by comer pieces.The rigidity (bending resistance) of rib with the pass of the width b of rib and height h is: w=kbh2, and wherein, k is coefficient, cuboid k=1/6, and increase h, bending resistance significantly improves.

To sum up, concrete material is that compressive strength is high, and tensile strength is very low, and must could be used for by curved by configuration reinforcement, therefore concrete well cover sheet thickness is relatively large, can not give full play to the mechanical property of concrete anti-compression.The cost of ductile cast iron manhole cover plate is higher, and the mechanical property of the manhole cover plate of macromolecule chemical material is poor, and the place being not suitable for larger load-bearing requirements uses.

Summary of the invention

The purpose of this utility model is to provide one how arched manhole cover plate, effectively solves the problem.

For effectively solving the problems of the technologies described above, the technical scheme that the utility model is taked is as follows:

How arched manhole cover plate, comprise a manhole cover structure main body, described main structure body is the reverse catenary in space or parabolic arcuation force structure, and described main body is made up of the arch shell of top top board, outer ring, bottom and internal layer, described arch shell is made up of reverse pot shape housing or the rib structure that distributes radially.

Especially, described arch shell comprises many group ring radiation shape holes.

Especially, the domes of many group rib structure composition ring-types.

The beneficial effects of the utility model are: the how arched manhole cover plate that the utility model provides, quote the mechanical concept of double curvature arch, pressure is born by interior stringcourse shell or arch rib, arch shell or arch rib are the reverse catenary in space or parabolic structure, under vertical uniform load q, only there is compressive stress in arch shell or arch rib, does not have tensile stress, without the need to configuration reinforcement; Arch shell or the above header field of arch rib hollow out as far as possible, also form multiple arced configuration, reduce the consumption of concrete material, alleviate dead load simultaneously.

Below in conjunction with accompanying drawing, the utility model is described in detail.

Accompanying drawing explanation

Fig. 1 is how arched manhole cover plate composition structural representation described in the utility model;

Fig. 2 is how arched manhole cover plate structure space schematic diagram described in the utility model;

Fig. 3 is structural section schematic diagram in how arched manhole cover plate described in the utility model.

Wherein:

111 top boards, 112 outer rings, 113 arch shells, 114 rib structures, 115 holes.

Detailed description of the invention

Embodiment 1:

In the present embodiment, the composition original paper of described conventional known structure does not do explanatory note and display in the drawings.

As Figure 1-3, how arched manhole cover plate disclosed in the present embodiment, comprise a manhole cover structure main body, described main structure body is the arcuation force structure of the reverse catenary in space or parabolic shape distribution, and described main body is made up of the arch shell 113 of top top board 111, outer ring, bottom 112 and internal layer, described arch shell 113 is made up of reverse pot shape housing or the rib structure 114 that distributes radially.

Described arch shell 113 comprises many group ring radiation shape holes 115.Many groups rib structure 114 forms the domes of ring-type.Described main structure body is made up of concrete and/or macromolecule chemical material.Described outer ring 112 is concrete and/or the macromolecule chemical material of built-in steel hoop or steel plate.

The know-why illustrating the present embodiment is below as follows:

Key technology is the reverse catenary in space or parabolical arcuation force structure, for weight reduction, arch shell hollows out into rib structure, selectively arrange hole, under vertical uniform load q, only there is compressive stress in arch shell (or arch rib), there is no tensile stress, realize how arched manhole cover plate without the need to configuration reinforcement, arch outer ring, the end adopts steel hoop or doughnut-shaped steel plate, is used for bearing the pressure encircleing shell (or arch rib) and transmit.Arch shell (or arch rib) above header field hollows out as far as possible, forms multiple ring-type arced configuration, just can reduce the consumption of concrete material, alleviate dead load simultaneously.

How arched manhole cover plate both can use concrete for making, also can make of macromolecule chemical material.Also combining structure can be adopted to make how arched manhole cover plate, as made arch shell (or arch rib) of concrete, more than arch shell (or arch rib) make of macromolecule chemical material; Arch shell (or arch rib) can also be made with plain cast iron, more than arch shell (or arch rib) make of concrete or macromolecule chemical material.

The technology path being different from prior art in the present embodiment is:

Quote the mechanical concept of double curvature arch, bear pressure by interior stringcourse shell or arch rib, arch shell or arch rib are the reverse catenary construction in space, and under vertical uniform load q, arch shell or arch rib only occur compressive stress, do not have tensile stress, without the need to configuration reinforcement; Arch shell or the above header field of arch rib hollow out as far as possible, also form multiple arced configuration, reduce the consumption of concrete material, alleviate dead load simultaneously.

The utility model is not limited to above-mentioned embodiment, and all employings and the utility model analog structure realize all embodiments of the utility model object all within the utility model protection domain.

Claims

1. how arched manhole cover plate, it is characterized in that, comprise a manhole cover structure main body, described main structure body is the reverse catenary in space or parabolic arcuation force structure, and described main body is made up of the arch shell of top top board, outer ring, bottom and internal layer, described arch shell is made up of reverse pot shape housing or the rib structure that distributes radially.

2. according to claim 1 how arched manhole cover plate, is characterized in that, described arch shell comprises many group ring radiation shape holes.

3. according to claim 1 how arched manhole cover plate, is characterized in that, the domes of many group rib structure composition ring-types.