CN106640143A - FRP (fiber reinforced plastics) grid arch-fiber reinforced concrete composite support structure with embedded reinforcing steel bars - Google Patents
FRP (fiber reinforced plastics) grid arch-fiber reinforced concrete composite support structure with embedded reinforcing steel bars Download PDFInfo
- Publication number
- CN106640143A CN106640143A CN201710054049.9A CN201710054049A CN106640143A CN 106640143 A CN106640143 A CN 106640143A CN 201710054049 A CN201710054049 A CN 201710054049A CN 106640143 A CN106640143 A CN 106640143A
- Authority
- CN
- China
- Prior art keywords
- frp
- reinforcing bar
- fiber reinforced
- grille
- archs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title abstract description 80
- 239000011151 fibre-reinforced plastic Substances 0.000 title abstract description 80
- 239000011210 fiber-reinforced concrete Substances 0.000 title abstract 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 title abstract 8
- 230000003014 reinforcing effect Effects 0.000 claims description 63
- 239000000835 fiber Substances 0.000 claims description 45
- 238000010276 construction Methods 0.000 claims description 26
- 210000003205 muscle Anatomy 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000013007 heat curing Methods 0.000 claims description 9
- 206010039509 Scab Diseases 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- -1 accordingly Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000011378 shotcrete Substances 0.000 abstract 1
- 238000001723 curing Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
Abstract
The invention discloses an FRP (fiber reinforced plastics) grid arch-fiber reinforced concrete composite support structure with embedded reinforcing steel bars. The FRP grid arch-fiber reinforced concrete composite support structure comprises FRP grid arches with the embedded reinforcing steel bars and a sprayed fiber reinforced concrete support. The FRP grid arches and the sprayed fiber reinforced concrete support are combined with one another to form the FRP grid arch-fiber reinforced concrete composite support structure; the FRP grid arches comprise FRP arc-shaped bars with the embedded reinforcing steel bars, FRP longitudinal straight bars with the embedded reinforcing steel bars and FRP stirrups, and the FRP arc-shaped bars, the FRP longitudinal straight bars and the FRP stirrups are connected with one another to form the FRP grid arches. The FRP grid arch-fiber reinforced concrete composite support structure has the advantages that the traditional reinforcing steel bars are embedded in FRP grids, respective merits of FRP and the reinforcing steel bars are comprehensively utilized, accordingly, the problems of easiness in corrosion, poor durability and heavy weights of existing reinforcing steel bars in tunnel projects can be fundamentally solved, and the shortcomings of mechanical properties of low elastic modulus, high deformation and brittle failure of the FRP can be overcome; the FRP grid arch-fiber reinforced concrete composite support structure which is an FRP grid structure with merits of lightweight, high strength, elastic modulus, ductility and cost performance and excellent corrosion resistance can be prepared; the FRP grid arch-fiber reinforced concrete composite support structure comprises sprayed fiber reinforced concrete, accordingly, metal nets can be omitted, and the compactness of sprayed concrete supports can be greatly advantageously improved; the FRP grid arch-fiber reinforced concrete composite support structure is applicable to tunnel projects with high requirements on mechanical properties and corrosion-resistant performance and has a broad application prospect, and the like.
Description
Technical field
The invention belongs to the research and development of the composite in the field such as building, traffic, water conservancy, new construction, and in particular to be used for one kind
The FRP grille archs of the embedded reinforcing bar of tunnel engineering-fiber concrete combined type supporting construction, its feature is high intensity, Gao Yan
Property, high elastic modulus, high performance-price ratio and excellent corrosion resistance.
Background technology
Grillage is one of preliminary bracing form the most frequently used in tunnel engineering, and reinforcing bar has as the component units of grid
The advantages of flexible modulus is high, ductility is good.Combined type supporting construction is constituted by concrete is sprayed into after grillage is performed, should
Combined type supporting construction is often by the part as tunnel engineering permanent support, and it is good durable that this requires that grillage has
Property.Because of underground water enrichment, bad environments in tunnel engineering, there is easy-to-rust, poor durability in reinforcing bar.
Fiber-reinforced polymer (FRP) is suitable to Service Environment, resistance to as a kind of new construction material for having development potentiality
The important engineering structure that long aspect such as property has high demands, such as underground structure, ocean structure.But FRP still suffer from elastic modelling quantity it is low, become
Shape is big, price is high and the problem in brittle break.
Traditional reinforcing bar is embedded in FRP grids, FRP and the respective advantage of reinforcing bar can be comprehensively utilized, fundamentally solve steel
The problem of material corrosion, and improve the mechanical property of FRP.Prepare and take into account lightweight, high intensity, high elastic modulus, high ductility, Gao Xing
The FRP cell structures of the advantages of valency ratio and excellent corrosion resistance.Wire netting need not be arranged using spray-fiber concrete, to carrying
The packing of high concrete spraying support is very beneficial.Propose that a kind of FRP grille archs-fiber of embedded reinforcing bar is mixed for this present invention
Solidifying soil combined type supporting construction.
The content of the invention
The purpose of the present invention is for the deficiencies in the prior art, there is provided a kind of corrosion resistance and good, ductility are high, cost performance
FRP grille archs-fiber concrete combined type the supporting construction of the high embedded reinforcing bar of high, elastic modelling quantity and intensity.
To achieve these goals, the technical solution adopted in the present invention is：A kind of FRP grille archs-fibre of embedded reinforcing bar
Dimension concrete composite supporting construction, the combined type supporting construction by embedded reinforcing bar FRP grille archs and spray-fiber concrete
Supporting is combined；Described FRP grille archs are by the FRP arched ribs of embedded reinforcing bar, the straight muscle in FRP longitudinal directions of embedded reinforcing bar and FRP
Stirrup is formed by connecting；Described FRP arched ribs are the skeleton muscle of the grille arch, and the described straight muscle in FRP longitudinal directions is the grille arch
Longitudinal rib, the described straight muscle in FRP longitudinal directions is set in qually spaced in arched ribs inner side；Because stirrup is primarily subjected to shear and embed reinforcing bar
FRP stirrups prepare complexity, therefore stirrup selects FRP stirrups.
The straight muscle in FRP longitudinal directions of embedded reinforcing bar is composited by internal reinforcing bar and FRP layers by pultrusion heat cure moulding process.
Internal reinforcing bar and FRP layers are combined by pultrusion heat cure moulding process, are then wound in surface with filament
Shape of threads, and Jing bending molding process is prepared into arched ribs.
Described FRP layers are composited by continuous fiber and thermosetting resin, and continuous fiber selects basalt fibre, glass
Fiber, carbon fiber or aramid fiber.
According to required mechanical performance index, according to composite theory the volume ratio of FRP material and reinforcing bar is calculated.
The straight equal scab in the surface of muscle and FRP stirrups in FRP longitudinal directions of the FRP arched ribs of embedded reinforcing bar, embedded reinforcing bar, to increase
Its cohesive force with fiber concrete.
Described bending molding process adopts the mould of arc shape.
A kind of preparation section of the arched ribs of the FRP of embedded reinforcing bar is：Reinforcing bar cutting → rebar surface decontamination → send yarn →
Fiber impregnation → the collection of filaments → reinforcing bar insert → pass through mould pultrusion → filament it is Wrapping formed → brake forming → heat
Curing molding → surface scab.
Using steel wire by the FRP arched ribs of embedded reinforcing bar, the straight muscle in longitudinal direction with FRP stirrup colligations into grille arch, and spray into fibre
Dimension concrete, wherein fiber are basalt fibre, glass fibre or steel fibre.Finally prepare the FRP grille archs of embedded reinforcing bar-
Fiber concrete combined type supporting construction.
The present invention is solidified togather reinforcing bar and FRP layers by pultrusion heat cure moulding process, reinforcing bar is total to FRP
Same stress, it is ensured that the supporting construction has good ductility.FRP layers protect internal reinforcing bar from environmental corrosion.The FRP grids
Arch surface is stained with sand, it is ensured that its effective bonding with concrete.The combined type supporting construction is more suitable for mechanical property
In the tunnel engineering having high demands with decay resistance.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the FRP grille archs of embedded reinforcing bar-fiber concrete combined type supporting construction of the present invention；
Fig. 2 is the structural representation of the FRP muscle that reinforcing bar is embedded in Fig. 1.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is explained in detail to technical scheme.
As depicted in figs. 1 and 2, the present invention provides a kind of FRP grille archs of embedded reinforcing bar-fiber concrete combined type supporting
Structure, described combined type supporting construction by embedded reinforcing bar FRP grille archs and spray-fiber concrete supporting 1 combine,
Wherein embed the FRP arched ribs 3 of the FRP grille archs by embedded reinforcing bar of reinforcing bar, the straight muscle 4 in FRP longitudinal directions of embedded reinforcing bar and FRP stirrups
2 are formed by connecting；Fiber selects basalt fibre in spray-fiber concrete supporting 1.
The fibre bundle of the reinforcing bar 5 of infiltration epoxy resin and infiltration epoxy resin is sent into together according to a certain percentage circular mode
Tool carries out pultrusion, fibre bundle be heating and curing after the volume ratio of epoxy resin-base be 2～3；Then heat cure is adopted
Technique carries out curing molding, prepares the straight muscle 4 in FRP longitudinal directions of embedded reinforcing bar.The sectional area of described FRP layers 9 accounts for embedded reinforcing bar
The 35～40% of the total sectional area of FRP muscle.
Described arched ribs 3 are combined by internal reinforcing bar 5 and FRP layers 9 by pultrusion molding process, and then Jing fibre bundles 6 are twined
Shape of threads surface 7 is coiled into, and Jing bending molding process is prepared into arched ribs.
In the surface scab 8 of above-mentioned FRP muscle, to increase its cohesive force with concrete.
A kind of preparation section of the FRP arched ribs of embedded reinforcing bar is：Reinforcing bar cutting → rebar surface decontamination → send yarn → fibre
Dimension impregnation → the collection of filaments → reinforcing bar 5 insert → pass through mould pultrusion → filament it is Wrapping formed → brake forming → thermosetting
Chemical conversion type → surface scab 8.
Using steel wire by the FRP arched ribs of embedded reinforcing bar, the straight muscle in longitudinal direction with FRP stirrup colligations into grille arch, and spray into profound
Military rock fiber concrete layer 1, is finally prepared into the FRP grille archs-fiber concrete combined type supporting construction of embedded reinforcing bar.
Embedded reinforcing bar in a kind of FRP grille archs of embedded reinforcing bar-fiber concrete combined type supporting construction of the present invention
FRP muscle is required less, can given birth on existing extruding equipment using traditional pultrusion heat cure moulding process, scrap build
Produce, application prospect is extensive.
Claims (9)
1. the FRP grille archs of a kind of embedded reinforcing bar-fiber concrete combined type supporting construction, it is characterised in that：The combined type
Protection structure by embedded reinforcing bar FRP grille archs and spray-fiber concrete supporting combine；Described FRP grille archs are by FRP
Arched ribs, the straight muscle in FRP longitudinal directions and FRP stirrups are formed by connecting；Described FRP arched ribs are the skeleton muscle of the grille arch, described
The straight muscle in FRP longitudinal directions is the longitudinal rib of the grille arch, and the described straight muscle in FRP longitudinal directions is set in qually spaced in arched ribs inner side；FRP arcs
Reinforcing bar in the straight muscle of muscle and FRP longitudinal directions is insert structure.
2. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：The straight muscle in FRP longitudinal directions is composited by internal reinforcing bar and FRP layers by pultrusion heat cure moulding process.
3. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：FRP arched ribs are combined reinforcing bar and FRP layers by pultrusion heat cure moulding process, are then existed with filament
The surface wrap of FRP layers is into shape of threads, and Jing bending molding process is prepared into arched ribs.
4. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：Described FRP layers are composited by continuous fiber and thermosetting resin, and continuous fiber selects basalt fibre, glass
Glass fiber, carbon fiber or aramid fiber.
5. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：According to required mechanical performance index, according to composite theory the volume ratio of FRP material and reinforcing bar is calculated.
6. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：FRP arched ribs, the straight equal scab in the surface of muscle and FRP stirrups in FRP longitudinal directions, it is viscous with fiber concrete to increase it
Knot power.
7. the FRP grille archs of a kind of embedded reinforcing bar according to claim 2-fiber concrete combined type supporting construction, its
It is characterised by：Described bending molding process adopts the mould of arc shape.
8. the FRP grille archs of a kind of embedded reinforcing bar according to claim 1-fiber concrete combined type supporting construction, its
It is characterised by：The preparation section of arched ribs be reinforcing bar cutting → rebar surface decontamination → send yarn → fiber impregnation → collection of filaments →
Reinforcing bar insert → pass through mould pultrusion → filament it is Wrapping formed → brake forming → heat cure shaping → surface scab.
9. the FRP grille archs of a kind of embedded reinforcing bar according to claim 8-fiber concrete combined type supporting construction, its
It is characterised by：Using steel wire by the FRP arched ribs of embedded reinforcing bar, the straight muscle in longitudinal direction with FRP stirrup colligations into grille arch, and spray into fibre
Dimension concrete, wherein fiber are basalt fibre, glass fibre or steel fibre；Finally prepare the FRP grille archs of embedded reinforcing bar-
Fiber concrete combined type supporting construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054049.9A CN106640143B (en) | 2017-01-22 | 2017-01-22 | A kind of FRP grille arch of embedded reinforcing bar-fiber concrete combined type supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054049.9A CN106640143B (en) | 2017-01-22 | 2017-01-22 | A kind of FRP grille arch of embedded reinforcing bar-fiber concrete combined type supporting construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640143A true CN106640143A (en) | 2017-05-10 |
| CN106640143B CN106640143B (en) | 2019-07-12 |
Family
ID=58841170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710054049.9A Expired - Fee Related CN106640143B (en) | 2017-01-22 | 2017-01-22 | A kind of FRP grille arch of embedded reinforcing bar-fiber concrete combined type supporting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640143B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103737947A (en) * | 2014-01-02 | 2014-04-23 | 南京工业大学 | Preparation method of shaped fibre reinforced composite knitted rib |
| CN105648909A (en) * | 2016-01-04 | 2016-06-08 | 湖南工业大学 | Fabricated combined bridge deck structure provided with grid type connector and construction method thereof |
| CN205558037U (en) * | 2016-04-26 | 2016-09-07 | 辽宁工业大学 | FRP board - concrete combination beam |
| CN205857456U (en) * | 2016-01-29 | 2017-01-04 | 广东工业大学 | A kind of built-in fabric strengthens the compound shear wall of composite material tube |
-
2017
- 2017-01-22 CN CN201710054049.9A patent/CN106640143B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103737947A (en) * | 2014-01-02 | 2014-04-23 | 南京工业大学 | Preparation method of shaped fibre reinforced composite knitted rib |
| CN105648909A (en) * | 2016-01-04 | 2016-06-08 | 湖南工业大学 | Fabricated combined bridge deck structure provided with grid type connector and construction method thereof |
| CN205857456U (en) * | 2016-01-29 | 2017-01-04 | 广东工业大学 | A kind of built-in fabric strengthens the compound shear wall of composite material tube |
| CN205558037U (en) * | 2016-04-26 | 2016-09-07 | 辽宁工业大学 | FRP board - concrete combination beam |
Non-Patent Citations (1)
| Title |
|---|
| 叶列平等: "《FRP在工程结构中的应用与发展》", 《土木工程学报》 * |
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| Publication number | Publication date |
|---|---|
| CN106640143B (en) | 2019-07-12 |
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Granted publication date: 20190712 |