CN203273022U - Composite material sandwich structure cable bridge - Google Patents

Abstract

The utility model discloses a composite material interlayer structure cable bridge which is easy to popularize and easy to construct, can effectively improve the rigidity, and can realize high load and large span, including a trough unit and a cover unit; the trough unit includes side plates and the bottom plate, the structure of the side plate and the bottom plate is one of the following four forms or a combination: a solid shell composed of a composite material surface layer; a sandwich entity composed of a composite material surface layer and a sandwich material; a composite material surface layer and a lattice structure A sandwich entity composed of webs; a sandwich entity composed of composite material surface layers, sandwich materials, and lattice webs; at most one of the side plates and bottom plates can use a composite material surface layer to form a solid shell structure. The utility model can be installed on large-scale communication and power transmission lines such as subways and bridges.

Description

A kind of composite material sandwich structure cable tray

technical field

The utility model relates to a cable bridge structure, in particular to a trough-type cable bridge made of composite materials, in particular to a trough-type cable bridge which is installed on large-scale communication and power transmission lines such as subways and bridges, and can realize high-load, large-scale Large-scale, long-span composite sandwich structure cable tray.

Background technique

With the further implementation of my country's western development strategy, the construction of my country's transportation, communication and other infrastructure has ushered in a new cycle. Over the years, people have gradually realized the superiority of FRP composite cable trays through the process of changing the materials of cable trays from wood, iron plates, galvanized sheets to hand-laid and molded FRP cable trays. With the development of modern industry, the increase in the span of modern workshops and the extension of the service life of cable bridges used in subways and bridges require the use of maintenance-free, corrosion-resistant, lightweight and high-strength composite material bridges, especially those that can adapt to large sizes and large bridges. The development of span pultruded FRP bridges has attracted people's attention.

In terms of bridge application, the current industry recommended standard "Cable Bridge Standard" (JB/T10216-2000) clearly stipulates the use of steel bridges, but does not clearly stipulate the use specifications of FRP bridges. In addition, for FRP bridges, unidirectional glass fiber filaments or fiber bundle materials are currently used to make bridges through pultrusion. Since this type of bridge uses single-fiber fibers, there is a large difference between vertical and horizontal lines, and because the elastic modulus of FRP is about 1/10 of that of steel, the stiffness of FRP bridge is low, so for medium and large bridge structures, steel is mainly used in the market. However, steel is easily corroded in a humid and exposed environment, and the cost of galvanizing it or using aluminum alloy will increase a lot.

Therefore, sandwich structure bridges with two-way cloth as the surface layer and filled with core materials have broad application prospects in medium and large bridge structures such as bridges and subways in the future.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a trough-type composite material bridge structure that is easy to popularize and easy to construct, can effectively improve the rigidity, and can realize high load and large span.

The technical solution adopted by the utility model is: a composite material sandwich structure cable bridge, including a groove unit and a cover unit;

The trough unit includes a side plate and a bottom plate, and the structure of the side plate and the bottom plate is one of the following four forms or a combination:

Solid shell with composite facings;

Sandwich entity composed of composite surface layer and sandwich material;

Sandwich entity composed of composite surface layer and lattice web;

Sandwich entity composed of composite material surface layer, sandwich material and lattice web;

At most one of the side panels and the bottom panel can use a composite material surface layer to form a solid shell structure.

As a preference, the composite surface layer and the lattice web are made of fiber and resin, the fiber is selected from at least one of carbon fiber, glass fiber, basalt fiber, aramid fiber, and hybrid fiber, and the resin is selected from unsaturated polyester , at least one of phthalic resin, vinyl resin, epoxy resin, inorganic resin or thermoplastic resin material.

As preferably, the sandwich core material is polyurethane foam, polyvinyl chloride foam, carbon foam, PEI foam and PMI foam, aluminum foam, foam sand, Balsa wood, Paulownia wood, fir, strong core felt, barbed wire, steel bar and flat steel At least one of the films.

Preferably, the layering of the composite surface layer and the fiber cloth in the lattice web is at least one of single-layer unidirectional, single-layer bidirectional, multi-layer unidirectional or multi-layer multi-directional. The angle at which the lattice web intersects with the surface layer of the composite material is optional, but is preferably arranged vertically and horizontally.

Preferably, the cover plate unit is one of composite materials, PP, PVC and aluminum materials, wherein the composite material cover plate is a composite material surface layer and a space lattice body, and/or a sandwich entity of a sandwich material, or A shell consisting of only composite facings.

Preferably, the side plates of the trough unit are straight walls, circular arcs, "I", inverted "L" and inverted "T".

Preferably, the groove-type unit is connected to the cover unit through a slot, the slot is a groove, a convex groove or no slot, and the cover unit is composed of a straight section in the middle of the cover and a slot.

Preferably, the trough unit and the cover plate are directly fixed by fasteners, and the fasteners are bolts, nylon rods or pins; or a combination of connecting pieces and fasteners is used.

The utility model uses resin as the matrix and composite material as the reinforcing material, and the core material is filled in the middle, and there is a lattice web in the middle of the core material. Production.

Compared with the prior art, the utility model has the following advantages:

1. The trough-type bridge frame of the utility model adopts a sandwich structure, which effectively improves the stiffness and bearing capacity of the composite material bridge frame; when the surface layer adopts two-way woven fabric, the difference in vertical and horizontal strength is small, and the large-span and large-size composite material bridge frame can be realized design.

2. The surface layer of the trough-type bridge frame of the utility model is made of resin-based fiber-reinforced composite material, which has excellent corrosion resistance and can be used in various harsh environments such as acid, alkali, sea water, etc., so it is especially suitable for cross-sea bridges, Tunnel or subway etc.

3. If the utility model is produced by using the pultrusion process, the span can be selected according to the actual situation, and the quality of the product is stable and the production efficiency is high.

4. The utility model improves the rigidity by adding a lightweight core material in the middle of the composite material surface layer to form a sandwich structure. Compared with steel with the same rigidity or a simple composite material bridge, the cost is lower.

5. The bottom plate and side plate of the trough-type interlayer structure bridge frame of the present invention are flexible in design and have a wide range of applications. They can be used not only for the renovation of existing bridge facilities, but also for the construction of new large and medium-sized bridge facilities.

Description of drawings

Fig. 1 is the schematic diagram of the structure of the trough-type sandwich structure bridge of the present invention;

Fig. 2-Fig. 7 is the schematic diagram of the cross-sectional form of the trough sandwich structure bridge of the present invention;

Fig. 8 is a schematic diagram of embodiment 1 of the grooved bridge frame of the present invention;

Fig. 9 is a schematic diagram of Embodiment 2 of the grooved bridge frame of the present invention;

Fig. 10 is a schematic diagram of Embodiment 3 of the trough bridge of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1: a composite material sandwich structure cable tray, including a groove unit 1 and a cover unit 2;

The trough unit 1 includes a side plate 4 and a bottom plate 3, and the structure of the side plate 4 and the bottom plate 3 is one of the following four forms or a combination:

A solid shell made of composite material facing 6;

A sandwich entity composed of a composite material surface layer 6 and a sandwich material 7;

A sandwich entity composed of a composite material surface layer 6 and a lattice web 8;

A sandwich entity composed of a composite material surface layer 6, a sandwich material 7, and a lattice web 8;

At most one of the side panels 4 and the bottom panel 3 can use a composite material surface layer 6 to form a solid shell structure.

The composite surface layer 6 and the lattice web 8 are made of fiber and resin, the fiber is selected from at least one of carbon fiber, glass fiber, basalt fiber, aramid fiber, and hybrid fiber, and the resin is selected from unsaturated polyester, At least one of ortho-phthalic resin, vinyl resin, epoxy resin, inorganic resin or thermoplastic resin material. The sandwich material 7 is polyurethane foam, polyvinyl chloride foam, carbon foam, PEI foam and PMI foam, aluminum foam, foam sand, Balsa wood, paulownia wood, Chinese fir, strong core felt, barbed wire, steel bars and flat steel sheets at least one of . The layering of the composite material surface layer 6 and the fiber cloth in the lattice web 8 is at least one of single-layer unidirectional, single-layer bidirectional, multi-layer unidirectional or multi-layer multi-directional. The angle at which the lattice web 8 intersects with the composite surface layer 6 is optional, but it is preferably arranged vertically and horizontally. The cover plate unit 2 is one of composite materials, PP, PVC and aluminum materials, wherein the composite material cover plate is a composite material surface layer and a space lattice body, and/or a sandwich entity of a sandwich material, or only a composite A shell consisting of a material surface. The side plate 4 of the trough unit 1 is straight wall, arc shape, "I" shape, inverted "L" shape, inverted "T" shape. The trough unit 1 and the cover unit 2 are connected through the slot 9, or directly fixed by fasteners, the fasteners are bolts, nylon rods or pins; or a combination of connectors and fasteners is adopted. The slot 9 is a groove, a convex slot or no slot, and the cover plate unit 2 is composed of a straight section 5 in the middle of the cover plate and a slot 9 .

2-7 are various cross-sectional forms of the trough unit 1 .

Example 1

As shown in FIG. 8 , a composite material sandwich structure cable tray is composed of a groove unit 1 and a cover unit 2 . The trough unit 1 includes a side plate 4 and a bottom plate 3. The trough unit 1 is a sandwich entity composed of a composite material surface layer 6 and a sandwich material 7 filled in the surface layer and a lattice web 8. The composite material surface layer 6 It is a solid shell made of glass fiber and vinyl resin cured at high temperature; the sandwich filling material 7 in the composite surface layer 6 is made of Paulownia wood core material, and there is a lattice web 8 between the Paulownia wood core materials. The web 8 is formed by laying biaxial glass fiber cloth along multiple layers and directions, and then adopts a pultrusion process to integrally form the groove unit 1 . After the trough unit 1 is prepared in the factory, the cover unit 2 is directly pultruded by adding a layer of glass felt on the upper and lower outer surfaces of the glass fiber unidirectional fiber bundle, and the cover plate is directly covered on the trough unit 1 at the installation site , so that it forms a closed trough-type composite material sandwich structure bridge matching with the trough-type unit 1. The trough unit 1 is connected with the cover unit 2 through a slot 9 , and the cover unit 2 is composed of a straight section 5 in the middle of the cover and a slot 9 .

Example 2

As shown in Figure 9, a composite material sandwich structure cable bridge, the bridge adopts the groove unit 1, the bottom plate 3 is a sandwich structure and the side plate 4 is a laminated plate form, which can be used for heavy-duty pipeline conveying devices for new subways, bridges and tunnel structures . The structure is composed of a groove unit 1 , a cover unit 2 and a fastener 10 . The trough unit 1 is composed of a side plate 4 and a bottom plate 3. The side plate 4 is composed of a composite material surface layer 6, which is a solid shell made of glass fiber and vinyl resin cured at high temperature. The shape of the side plate 4 is an inverted "L" , Punch holes on the upper end for later assembly. The bottom plate 3 is composed of a composite material surface layer 6 and a sandwich material 7 filled in the surface layer, without lattice webs. The groove unit 1 is integrally formed by a pultrusion process. After the trough unit 1 is prepared in the factory, the cover unit 2 is an aluminum thin plate. At the installation site, bolts are used as fasteners 10 to be fixed on the trough unit 1 to form a closed trough composite material sandwich structure bridge that matches the trough unit 1 .

Example 3

As shown in Figure 10, a cable tray with a composite material sandwich structure, the bridge uses a grooved unit 1 bottom plate 3 is a hollow shell structure with ribs and the side plate 4 is a laminated plate form, which can be used for new subways, bridges and tunnel structures The heavy-duty pipeline delivery device can also be used to replace damaged bridge sections. The structure consists of a trough unit 1 and a cover unit 2. The trough unit 1 is composed of a side plate 4 and a bottom plate 3. The side plate 4 is a solid shell composed of a composite material surface layer 6 cured by glass fiber and vinyl high-temperature resin. Its shape is an inverted "I" shape, and the bottom plate 3 is a ribbed hollow shell structure, which is composed of a diagonal rib lattice web 8 and a composite material surface layer 6 . The groove unit 1 is integrally formed by glass fiber and vinyl resin solidified at high temperature through a pultrusion process. After the groove unit 1 is prepared in the factory, the cover plate unit 2 is made of two-way pultruded glass fiber to form a plate with slots 9 on both sides of the same span as the groove unit 1, and the cover plate is directly assembled on the installation site. One side advances along the slot 9 to form a closed slot-type composite material sandwich structure bridge matched with the slot-type unit 1 .

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (6)

1. a composite material sandwich structure cable testing bridge, is characterized in that: comprise groove segment and cover plate unit;

Described groove segment comprises side plate and base plate, and described side plate and bottom plate structure are one of following four kinds of forms or combination:

The solid housing that composite faces consists of;

The interlayer entity that composite faces and sandwich material form;

The interlayer entity that composite faces and lattice web form;

The interlayer entity that composite faces and sandwich material, lattice web form;

Described side plate and base plate can only have at most one to adopt composite faces to consist of solid shell construction.

2. a kind of composite material sandwich structure cable testing bridge according to claim 1 is characterized in that: in described composite faces and lattice web the laying of fibre cloth be that individual layer is unidirectional, single-layer bidirectional, multilayer is unidirectional or multi-layer and multi-directional at least a.

3. a kind of composite material sandwich structure cable testing bridge according to claim 1, it is characterized in that: described cover plate unit is a kind of in composite material, PP, PVC and aluminium material, wherein the composite material cover plate is composite faces and space lattice body, and/or the interlayer entity of sandwich material, the housing that perhaps only has composite faces to form.

4. a kind of composite material sandwich structure cable testing bridge according to claim 1, it is characterized in that: the side plate of described groove segment is straight wall, circular arc, " I " shape, inverted "L" shaped, inverse-T-shaped.

5. a kind of composite material sandwich structure cable testing bridge according to claim 1, it is characterized in that: described groove segment is connected by draw-in groove with cover plate unit, and draw-in groove is groove, tongue or do not stay groove, cover plate unit is made of cover plate neutral straight section and draw-in groove.

6. a kind of composite material sandwich structure cable testing bridge according to claim 1, it is characterized in that: described groove segment and cover plate directly use fastening piece to fix, and fastening piece is bolt, nylon rod or pin; Or the mode of employing link and fastener combination.

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