CN106640150A - Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure - Google Patents
Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure Download PDFInfo
- Publication number
- CN106640150A CN106640150A CN201710054059.2A CN201710054059A CN106640150A CN 106640150 A CN106640150 A CN 106640150A CN 201710054059 A CN201710054059 A CN 201710054059A CN 106640150 A CN106640150 A CN 106640150A
- Authority
- CN
- China
- Prior art keywords
- frp
- shaped steel
- steel
- embedded
- section bar
- 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.)
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/20—Special cross- sections, e.g. corrugated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
Abstract
The invention discloses a section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure. The supporting structure is composed of a section steel embedded type FRP sectional material arch and a vertical steel bar by welding, and sand is stuck on an outer layer of the FRP sectional material arch. In a tunneling project, underground water is enriched and the environment is bad, and an arch supporting structure is used as one part of tunnel permanent support and has the problems of easiness of being rusted and poor durability. An FRP sectional material has the advantages of light weight, high corrosion resistance, high strength and the like; however, the FRP sectional material also has the problems of high price, low elastic modulus, large deformation and brittle failures. Traditional section steel is embedded into the FRP sectional material and respective advantages of FRP and steel can be comprehensively utilized, so that the problem of steel corrosion is radically solved and the mechanical properties of the FRP are improved. The supporting structure disclosed by the invention integrates the advantages of high elastic modulus and high ductility of the steel, and the light weight, high strength and high corrosion resistance and the like of the FRP, and has a good application prospect in the tunneling project.
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 section bar bow member supporting construction of the embedded shaped steel of tunnel engineering.Its feature is lightweight, high intensity, high ductility, high resiliency mould
Amount, high performance-price ratio, excellent decay resistance.
Background technology
Steel arch-shelf is one of preliminary bracing form the most frequently used in tunnel engineering, and it has elastic modelling quantity is big, ductility is high etc.
Advantage.Most of steel arch-shelf as a part for tunnel permanent support, therefore can require that it has good durability.Because of tunnel
There is easy corrosion, poor durability in underground water enrichment, bad environments in engineering, steel.FRP has lightweight, corrosion-resistant
Property it is strong, the advantages of intensity is high, but FRP still suffers from that elastic modelling quantity is low, deformation is big, price is high and is in the problem of brittle break.
Traditional shaped steel is embedded in FRP section bars, FRP and the respective advantage of steel can be comprehensively utilized, fundamentally solve steel
The problem of corrosion, and improve the mechanical property of FRP.Prepare and take into account lightweight, high intensity, high elastic modulus, high ductility, high sexual valence
It is that this present invention proposes a kind of FRP section bar bow members of embedded shaped steel than FRP profile structures the advantages of, excellent anticorrosive performance
Supporting construction.The internal layer and outer layer of actual medium section bow member supporting construction all can gunite concrete.By the outer layer of FRP section bar bow members
Glue one layer of sand, it is ensured that its effective bonding with concrete.
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 light weight, corrosion resistance and good, cost performance
The FRP section bar bow member supporting construction of the high embedded shaped steel of high, elastic modelling quantity and intensity.
To achieve these goals, the technical solution adopted in the present invention is：The FRP section bars bow member of a kind of embedded shaped steel
Protection structure, the supporting construction is made up of the FRP section bars arch and longitudinal reinforcement of embedded shaped steel, and longitudinal reinforcement is welded on embedded shaped steel
The outer surface of FRP section bars arch.
The FRP section bars arch of embedded shaped steel is the skeleton of supporting construction, embeds the FRP section bars arch of shaped steel by shaped steel and FRP layers
Compound by pultrusion molding process, Jing bending molding process is bent and is formed by connecting by connecting plate.Due in section bar bow member
Layer and outer layer all can gunite concrete, as a part for tunnel permanent support.Therefore the surface scab of the FRP section bars arch, protect
Demonstrate,prove its effective bonding with concrete.
The FRP layers are composited by continuous fiber and thermosetting resin, fiber from basalt fibre, glass fibre,
Carbon fiber or aramid fiber.
Shaped steel is I-steel, box-shaped steel, H-shaped steel, channel-section steel, square-tube-shaped steel or T steel
According to required mechanical performance index, according to composite theory the volume ratio of FRP material and shaped steel is calculated.
The shaped steel surface first passes through impregnation, then is combined by pultrusion molding process and FRP.
Described pultrusion molding process adopts the mould corresponding with beam steel shape.
A kind of embedded shaped steel FRP section bars arch preparation section be：Shaped steel cuts → send yarn → fiber impregnation → shaped steel leaching
Mould pultrusion → bend to arc component → heat cure shaping → using connecting is inserted → passed through to the glue → collection of filaments → shaped steel
The connection of above-mentioned arc component is constituted section bar arch → surface scab by fishplate bar.
The FRP section bars arch of the embedded shaped steel of above-mentioned preparation is in place, and longitudinal reinforcement encircles embedded by being welded to form with section bar
Shaped steel FRP section bar bow member supporting construction.
The FRP section bar bow member supporting construction of the embedded shaped steel of the present invention, by pultrusion heat cure moulding process by shaped steel and
FRP layers are solidified togather, and enable shaped steel with the common stress of FRP.Can ensure that the supporting construction has good ductility.FRP layers
Internal shaped steel is protected from environmental corrosion.The FRP section bar bow members surface is stained with sand, it is ensured that its effective bonding with concrete.
The supporting construction is more suitable in the tunnel engineering having high demands to mechanical property and decay resistance.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the FRP section bar bow member supporting construction of embedded I-steel of the present invention；
Fig. 2 is A-A profiles in Fig. 1.
Specific embodiment
I-steel belongs to the one kind in shaped steel, below in conjunction with the accompanying drawings and embodiment is carried out in detail to technical scheme
Thin elaboration.
As depicted in figs. 1 and 2, the present invention provides a kind of FRP section bar bow member supporting construction of embedded I-steel, embeds work
The FRP section bar bow member supporting construction of Zee bar steel Z is welded by the FRP section bars arch and longitudinal reinforcement 3 of embedded I-steel.It is described
FRP section bars arch is formed by connecting by some FRP arc components 1 by connecting plate 2, and described FRP arc components 1 include I-steel
6th, the sand grains 4 on being fastened on the FRP layers 7 of the outer surface of I-steel 6 and FRP layers.
The fibre bundle of the I-steel 6 of infiltration epoxy resin and infiltration epoxy resin is sent into together pultrusion die, it is described
Fibre bundle be heating and curing after epoxy resin-base volume ratio be 2-3.Then curing molding is carried out using heat curing process.
The sectional area of described FRP layers 7 accounts for the 35-40% of the total sectional area of embedded I-steel FRP section bars arch.
FRP is solidificated in by I-steel surface by pultrusion molding process, is adopted and I-shaped corresponding mould.
A kind of embedded shaped steel FRP section bars arch preparation section be：I-steel cuts → send yarn → fiber impregnation → work
Mould pultrusion → bend to 1 → thermosetting of arc component is inserted → passed through to 6 impregnations of the Zee bar steel Z → collection of filaments → I-steel 6
Chemical conversion type → above-mentioned arc component 1 is connected into composition section bar arch → surface scab grain 4 using connecting plate 2.
The FRP section bars of above-mentioned preparation arch is in place, and FRP section bars arch is fixed on basis 5, using welding by longitudinal reinforcement 3
With the FRP section bar bow member supporting construction that section bar arch connects into embedded I-steel.
Component in a kind of FRP section bar bow member supporting construction of embedded shaped steel of the present invention is using traditional pultrusion thermosetting chemical conversion
Type technique is prepared from, and scrap build requires that less can be produced on existing extruding equipment, application prospect is extensive.
Claims (8)
1. the FRP section bar bow member supporting construction of a kind of embedded shaped steel, it is characterised in that：The supporting construction by embedded shaped steel FRP
Section bar encircles and longitudinal reinforcement composition, and longitudinal reinforcement is welded on the outer surface of the FRP section bars arch of embedded shaped steel；
The FRP section bars arch of embedded shaped steel is the skeleton of supporting construction, and the FRP section bars arch of embedded shaped steel is passed through by shaped steel and FRP layers
Pultrusion molding process is combined, and Jing bending molding process brake formings, the section direction equidistantly distributed along shaped steel and FRP layers has company
Fishplate bar；Due to section bar bow member internal layer and outer layer all can gunite concrete, and gunite concrete is used as tunnel permanent support
A part；The surface scab of the FRP section bars arch of embedded shaped steel, it is ensured that its effective bonding with outer jet concrete.
2. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：The FRP
Layer is composited by continuous fiber and thermosetting resin, and fiber is fine from basalt fibre, glass fibre, carbon fiber or aramid fiber
Dimension.
3. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：The type
Steel is I-steel, box-shaped steel, H-shaped steel, channel-section steel, square-tube-shaped steel or T steel.
4. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：According to institute
Mechanical performance index is needed, according to composite theory the volume ratio of FRP layers and shaped steel is calculated.
5. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：The type
Steel surface first passes through impregnation, then is combined by pultrusion molding process and FRP.
6. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：Described
Pultrusion molding process adopts the mould corresponding with beam steel shape.
7. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 1, it is characterised in that：In a kind of
Insert-type steel FRP section bars arch preparation section be：Shaped steel cut → send yarn → fiber impregnation → shaped steel impregnation → collection of filaments →
Shaped steel is inserted → is passed through mould pultrusion → bend to arc component → heat cure and is molded → utilizes connecting plate by above-mentioned arc
Component connection composition section bar arch → surface scab.
8. the FRP section bar bow member supporting construction of a kind of embedded shaped steel according to claim 7, it is characterised in that：To prepare
Embedded shaped steel FRP section bars arch it is in place, longitudinal reinforcement and section bar encircle by being welded to form embedded shaped steel FRP section bars bow member supporting
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054059.2A CN106640150A (en) | 2017-01-22 | 2017-01-22 | Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054059.2A CN106640150A (en) | 2017-01-22 | 2017-01-22 | Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106640150A true CN106640150A (en) | 2017-05-10 |
Family
ID=58841230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710054059.2A Pending CN106640150A (en) | 2017-01-22 | 2017-01-22 | Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640150A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575246A (en) * | 2017-10-13 | 2018-01-12 | 北京工业大学 | A kind of construction method of pre-manufactured steel-FRP complex wave card tunnel bottom supporting construction |
| CN112976607A (en) * | 2021-05-06 | 2021-06-18 | 华北水利水电大学 | FRP (fiber reinforced plastic) section fiber concrete composite construction method and structure for enhancing fatigue load |
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 CN201710054059.2A patent/CN106640150A/en active Pending
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 (2)
| Title |
|---|
| 叶列平等: "《FRP在工程结构中的应用与发展》", 《土木工程学报》 * |
| 蒋林华: "《水力工程海洋工程新材料新技术 水工材料会议论文集》", 30 November 2006, 河海大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575246A (en) * | 2017-10-13 | 2018-01-12 | 北京工业大学 | A kind of construction method of pre-manufactured steel-FRP complex wave card tunnel bottom supporting construction |
| CN112976607A (en) * | 2021-05-06 | 2021-06-18 | 华北水利水电大学 | FRP (fiber reinforced plastic) section fiber concrete composite construction method and structure for enhancing fatigue load |
| CN112976607B (en) * | 2021-05-06 | 2023-01-31 | 华北水利水电大学 | FRP (fiber reinforced plastic) section fiber concrete composite construction method and structure for enhancing fatigue load |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
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| RJ01 | Rejection of invention patent application after publication |