CN108930542A - A kind of compound CFRP restrained concrete arch of light-duty high-strength and construction method - Google Patents
A kind of compound CFRP restrained concrete arch of light-duty high-strength and construction method Download PDFInfo
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- CN108930542A CN108930542A CN201811032583.0A CN201811032583A CN108930542A CN 108930542 A CN108930542 A CN 108930542A CN 201811032583 A CN201811032583 A CN 201811032583A CN 108930542 A CN108930542 A CN 108930542A
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- carbon fiber
- compound
- tube
- snap ring
- arch
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- 239000004567 concrete Substances 0.000 title claims abstract description 47
- 150000001875 compounds Chemical class 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000004918 carbon fiber reinforced polymer Substances 0.000 title claims abstract description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 56
- 239000004917 carbon fiber Substances 0.000 claims abstract description 56
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 54
- 230000004888 barrier function Effects 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 239000011229 interlayer Substances 0.000 claims abstract description 19
- 230000008093 supporting effect Effects 0.000 claims abstract description 17
- 238000006798 ring closing metathesis reaction Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000001764 infiltration Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 8
- 239000000835 fiber Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000010412 perfusion Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of compound CFRP restrained concrete arch of light-duty high-strength and construction method, structure is to assemble and be perfused the arch frame structure that core concrete is formed by connection sleeve and fixation steel plate by several compound carbon fiber confinement tubes.The compound carbon fiber confinement tube is made of inner tube, resin pickup carbon fiber interlayer and outer tube, is pasted between each layer by resin；The connection sleeve is divided into single barrier snap ring closure sleeve and double two kinds of snap ring perferated thimble of barriers, the barrier snap ring two sides of single barrier snap ring closure sleeve weld there are four circumferentially distributed fixed steel bars pawl, two outsides for obstructing snap rings of double barrier snap ring perferated thimbles weld there are four circumferentially distributed fixed steel bars pawl.The present invention can be used for roadway support, supporting intensity not only can be improved, but also greatly reduce arch overall weight, convenient for construction.
Description
Technical field
The present invention relates to mine timbering technical field more particularly to a kind of light-duty high-strengths of Deep Soft Rock Tunnel supporting
Supporting arch.
Background technique
In Deep Soft Rock Tunnel, bearing capacity of the wall rock is lower, has apparent rheological characteristic.If supporting intensity is insufficient,
The rheodestruction of country rock will sustainable development, tunnel is unable to maintain that steadily in the long term.Therefore it is given after surrouding rock deformation to a certain degree
Country rock apply the supporting construction with higher-strength be it is very crucial, it can effectively prevent the development of rheodestruction,
Guarantee that country rock is steady in a long-term.In this case, rigid protection of the confined concrete arch as a kind of high intensity, due to its structure
Simply, it is widely used in the supporting of Deep Soft Rock Tunnel.
The confined concrete arch applied in current major part mine and geotechnical engineering is mostly concrete filled steel tube arch and carbon
Fiber mold-bagged concrete arch, still, there is also following problems in practical applications for these confined concrete brackets.
Chinese invention patent CN201720406727.9 discloses a kind of concrete filled steel tube arch for roadway support, should
Arch is made of concrete-filled steel tube arch frame body and steel pipe, strength and stiffness with higher；But the arch frame structure is multiple
Miscellaneous, cost of manufacture is expensive, and erection difficulty is excessively high, and it is insufficient to be used for arch limit anti-bending strength when deep tunnel supporting.
Chinese utility model patent CN201520955522.7 is disclosed for a kind of novel coagulation of deep tunnel supporting
Native bracket, the arch are the flexible pipe body being processed and formed at one time by geotechnical fabric bag and carbon fiber, crossbeam clip, crossbeam and concrete
Composition；The arch have many advantages, such as can a form, flexible pipe body it is foldable and accelerate inner concrete speed, but
The carbon fiber layer for being the arch is sticked on the inside of geotechnical fabric bag, can be generated due to the broken of core concrete when arch destroys
The rubble of sharp crops for rotation is largely had, since the carbon fiber interlayer of liner directly contacts core concrete, and carbon fiber is as one
Kind of tension but the material of not shearing resistance, thus carbon fiber interlayer can due to rubble shear action and failure by shear occurs, while
During concrete perfusion, the direct contact of the carbon fiber layer of the concrete and liner of flowing can also be caused carbon fiber centainly
Damage, cause the tensile strength of carbon fiber layer also to will be greatly reduced, to be unable to give full play out the tension of carbon fibre material
Performance is eventually exhibited as arch Lack of support, is easy to appear phenomena such as arch destroys ahead of time.
In conclusion traditional confined concrete arch to the supporting effect and speed of application of Deep Soft Rock Tunnel not
Very ideal, therefore, exploratory development goes out a kind of arch high and easy to install suitable for the light weight of Deep Soft Rock Tunnel supporting, intensity
Supporting construction is very necessary.
Summary of the invention
The present invention is to solve the above problems, propose a kind of light-duty high-strength composite carbon suitable for Deep Soft Rock Tunnel supporting
Fibre restriction concrete arch.The present invention has the advantages that light weight, intensity are high and easy to install, encloses meeting us and controlling tunnel
While rock deforms, it is more reduction of the labor intensity that underground construction personnel install arch in narrow lane space, is improved
Construction efficiency.
A kind of construction of the compound CFRP restrained concrete arch of light-duty high-strength of the present invention are as follows: about by several compound carbon fibers
Beam tube, connection sleeve and fixation steel plate, core concrete composition, which is characterized in that the compound carbon fiber confinement tube is by interior
Layer pipe, resin pickup carbon fiber interlayer and outer tube composition, resin pickup carbon fiber interlayer is between inner tube and outer tube；It is described
Connection sleeve be divided into single barrier snap ring closure sleeve and double two kinds of snap ring perferated thimble of barriers, wherein single barrier snap ring stall
Cylinder welds a piece of barrier snap ring, and double barrier snap ring perferated thimble welding two panels obstruct snap ring, and add hole between two barrier snap rings
Hole；The fixation steel plate is welded on connection sleeve side, and arch is anchored on the inner wall of tunnel.
It is described in order to protect carbon cloth by rubble failure by shear, not give full play of the tensile property of carbon fibre material
Compound each layer of carbon fiber confinement tube between pasted by resin, the inner tube and outer layer of resin pickup carbon fiber interlayer two sides
Rubble can be effectively reduced to the shear action of carbon cloth in pipe.
In order to improve connection sleeve bonding strength, the connection sleeve inner barrier snap ring two sides weld there are four ring
To the fixed steel bars pawl of distribution, reinforcing bar pawl can be inserted into concrete after the completion of concreting, to greatly improve connector sleeve
The bonding strength of cylinder.
In order to avoid directly spud in injected hole and gas vent on the tube body of compound carbon fiber confinement tube and caused by tube body
Strength reduction, it is double barrier snap ring perferated thimbles, injected hole and exhaust that the top connection sleeve, which connects sleeve with bottom,
Hole setting is between two barrier snap rings, to ensure that the integrality of tube body.
A kind of construction method of the compound CFRP restrained concrete arch of light-duty high-strength of the present invention are as follows:, will when tube body makes
Carbon cloth is wrapped in the inner tube for being coated with resinoid bond, and is inserted in outer tube, and one end is then immersed binding resin
In, it is evacuated in other end gap so that the entire carbon cloth interlayer of resin infiltration, the shape after resin sufficiently solidifies
At the compound carbon fiber confinement tube；When construction, several compound carbon fiber confinement tubes are passed through by company according to cross-section shape of roadway
Female connector cylinder is assembled into whole tube body, and then tube body is anchored on the inner wall of tunnel by fixation steel plate, is connected finally by bottom
Core concrete is perfused in the hole of sleeve, forms arch supporting construction.
A kind of compound CFRP restrained concrete arch advantage of light-duty high-strength of the present invention is:
(1) present invention can give full play to the extremely strong tensile property of carbon fibre material, and compound carbon fiber confinement tube passes through to core
Concrete applies powerful restraining force, so that core concrete is generated modification, and then greatly enhances the bearing capacity of arch, can be with
Meet the requirement of control Deep Soft Rock Tunnel surrouding rock deformation；
(2) present invention is when carrying out supporting, by the way of first setting up tube body, rear progress slip casting, due to the constraint outside arch
System is far below concrete-filled steel tube arch using resin pickup carbon fiber interlayer, weight are arranged between inner tube and outer tube
The steel pipe of frame reduces labor intensity when underground construction personnel carry in narrow lane space, install arch, mentions significantly
High construction efficiency；
(3) inner tube of the compound carbon fiber confinement tube of confined concrete arch of the present invention and outer tube can be used as resin pickup carbon
The protective layer of fibrous interlayer can play the role of protecting internal carbon fibers, so as to avoid mix in concreting process
Composition granule is to material damage caused by carbon fiber bundle, or even removing, at the same can also to avoid when arch installation to resin pickup carbon
The damage of fibrous interlayer.This structure had both given full play to the excellent performance of carbon fiber, also weakened carbon fiber shear behavior not
The defect of foot；
(4) the connection sleeve is rigid sleeve, can resist larger moment of flexure, and internal reinforcing bar pawl can protrude into compound carbon fiber
In core concrete in confinement tube, axial bonding strength is substantially increased；Meanwhile top connection sleeve and the bottom company of arch
Female connector cylinder is double barrier snap ring perferated thimbles, by injected hole and gas vent setting between two barrier snap rings, so as to keep away
Exempt from as the aperture directly on compound carbon fiber confinement tube tube body and caused by tube body strength reduction, ensure that the complete of tube body
Property；
(5) the compound carbon fiber confinement tube described in limits the transversely deforming of core concrete, improves its compression strength and prolongs
Property, it avoids arch and brittle break occurs；
(6) for support cost, since its bearing capacity is powerful, the high expense that can be repeatedly repaired again to avoid supporting construction,
Overall support cost of the invention is lower.
Detailed description of the invention
Fig. 1 is compound carbon fiber confinement tube structural schematic diagram of the invention.
Fig. 2 is sectional view (not filling concrete) of the invention.
Fig. 3 is that present invention top connects tube-in-tube structure detail drawing (double barrier snap ring perferated thimbles).
Fig. 4 is that bottom of the present invention connects tube-in-tube structure detail drawing (double barrier snap ring perferated thimbles).
Fig. 5 is that side wall of the present invention connects tube-in-tube structure detail drawing (single barrier snap ring is closed sleeve).
Fig. 6 is the compound carbon fiber confinement tube transverse cross-sectional view (concrete perfusion) of the present invention.
Legend: 1- outer tube, 2- resin pickup carbon fiber interlayer, 3- inner tube, 4- connection sleeve, 5- fixed steel bars pawl, 6-
Barrier snap ring, 7- fixation steel plate, 8- connecting rod fixation hole, 9- sleeve anchor hole, the top 10- connection sleeve, 11- top vent,
The bottom 12- connects sleeve, the bottom 13- injected hole, the fixed connecting rod of 14-, 15- fixing bolt, 16- core concrete, 17- composite carbon
Fiber confinement tube.
Specific embodiment
A kind of compound CFRP restrained concrete arch of light-duty high-strength as shown in Figure 1 is by several compound carbon fiber confinement tubes
17, sleeve 4 and fixation steel plate 7 are connected, core concrete 16 forms, the compound carbon fiber confinement tube is by outer tube 1 and interior
Layer pipe 3 and resin pickup carbon fiber interlayer 2 form, and resin pickup carbon fiber interlayer 2 passes through between outer tube 1 and inner tube 3
Resin is pasted integral；The connection sleeve bosom be welded with barrier snap ring 6, barrier 6 two sides of snap ring weld there are four ring
To the fixed steel bars pawl 5 of distribution, and connect the intensity that sleeve semi-finals degree is higher than compound carbon fiber confinement tube 17；The fixation
Steel plate 7 is welded on connection 4 side of sleeve, and arch is anchored on the inner wall of tunnel.
Above-mentioned connection sleeve 4, which is divided to, is closed sleeve and double two kinds of snap ring perferated thimble of barriers for single barrier snap ring, wherein single
It obstructs snap ring and is closed a piece of barrier snap ring 6 of sleeve weld, the connection for the compound carbon fiber confinement tube of tunnel side wall；Double barrier cards
Ring perferated thimble welds two panels and obstructs snap ring 6, and adds hole between two barrier snap rings, for tunnel top, the compound carbon fiber in bottom
Tie up the connection of confinement tube 17.When double barrier snap ring perferated thimbles are used as top connection sleeve 10, hole is gas in drain
Gas vent 11；When connecting sleeve 12 as bottom, hole is the injected hole 13 that core concrete 16 is perfused.
When compound carbon fiber confinement tube makes, carbon cloth is wrapped in the inner tube for being coated with resinoid bond, to protect
It can be adequately filled up by carbon cloth between card inner tube and outer tube, need to be wound to adequate thickness, be then inserted in outer tube,
Gap between other end inner tube and outer tube is evacuated, and makes resin from bottom under the action of atmospheric pressure
Carbon cloth interlayer gradually diffuse up, until entire carbon cloth interlayer is infiltrated, after resin sufficiently solidify described in formation
Compound carbon fiber confinement tube 17.
When construction, according to cross-section shape of roadway by several compound carbon fiber confinement tubes 17 by connect sleeve 4 be assembled into it is whole
Then tube body is anchored on the inner wall of tunnel by body tube body by fixation steel plate 7, finally by the injected hole of bottom connection sleeve 12
13 perfusion core concretes 16 are managed interior gas and are excluded by the gas vent 11 that top connects sleeve 10, ultimately form arch supporting
Structure.
Claims (5)
1. a kind of compound CFRP restrained concrete arch of light-duty high-strength, it is by several compound carbon fiber confinement tubes, connector sleeve
Cylinder and fixation steel plate, core concrete composition, which is characterized in that the compound carbon fiber confinement tube is by inner tube, resin pickup
Carbon fiber interlayer and outer tube composition, resin pickup carbon fiber interlayer are pasted between inner tube and outer tube by resin
It is whole；The connection sleeve is divided into single barrier snap ring closure sleeve and double two kinds of snap ring perferated thimble of barriers, wherein the list
Obstruct snap ring and be closed a piece of barrier snap ring of sleeve weld, and the axial two sides of single barrier snap ring weld there are four it is circumferentially distributed
Fixed steel bars pawl, double barrier snap ring perferated thimbles welding two panels obstruct snap rings, and the outside two of double barrier snap rings
Face is welded there are four circumferentially distributed fixed steel bars pawl, and adds hole between two barrier snap rings.
2. a kind of compound CFRP restrained concrete arch of light-duty high-strength as described in claim 1, which is characterized in that the company
The internal diameter of female connector cylinder and the outer diameter of compound carbon fiber confinement tube are equal, and the leg of the reinforcing bar pawl with connect sleeve lining away from
It is equal from the thickness of compound carbon fiber confinement tube；The intensity of the connection sleeve is higher than the intensity of compound carbon fiber confinement tube.
3. a kind of compound CFRP restrained concrete arch of light-duty high-strength as described in claim 1, which is characterized in that described
When double barrier snap ring perferated thimbles are used as top connection sleeve, hole is for gas in drain；When connecting sleeve as bottom,
Hole is for being perfused core concrete.
4. a kind of compound CFRP restrained concrete arch of light-duty high-strength as described in claim 1, which is characterized in that described
Inner tube and outer tube are made of steel or intensity, rigidity not less than the other materials of steel, protect internal resin pickup carbon
Fibrous interlayer is not cut up by rock or broken concrete.
5. a kind of construction method of the compound CFRP restrained concrete arch of light-duty high-strength as described in claim 1-4 is any,
It is characterized in that, carbon cloth is wrapped in the inner tube for being coated with resinoid bond when compound carbon fiber confinement tube makes, and
It is inserted in outer tube, then one end is immersed in binding resin, is evacuated in other end gap so that resin infiltration
Entire carbon fiber interlayer, forms the compound carbon fiber confinement tube after resin sufficiently solidifies；When construction, according to drift section
Several compound carbon fiber confinement tubes are assembled into whole tube body by connecting sleeve by shape, then pass through fixation steel plate for tube body anchor
Gu core concrete is perfused finally by the hole of bottom connection sleeve, forms arch supporting construction on the inner wall of tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032583.0A CN108930542B (en) | 2018-09-05 | 2018-09-05 | Light high-strength composite carbon fiber confined concrete arch frame and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032583.0A CN108930542B (en) | 2018-09-05 | 2018-09-05 | Light high-strength composite carbon fiber confined concrete arch frame and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108930542A true CN108930542A (en) | 2018-12-04 |
| CN108930542B CN108930542B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811032583.0A Active CN108930542B (en) | 2018-09-05 | 2018-09-05 | Light high-strength composite carbon fiber confined concrete arch frame and construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593979A (en) * | 2020-11-17 | 2021-04-02 | 中煤科工集团北京华宇工程有限公司 | Roadway support device |
| CN113944485A (en) * | 2021-10-15 | 2022-01-18 | 中国建筑土木建设有限公司 | CFRP confined concrete arch frame |
| CN114991810A (en) * | 2022-08-03 | 2022-09-02 | 山东建筑大学 | Composite supporting structure and construction method of wall rear mould bag grouting and high-strength support |
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| BE792501A (en) * | 1971-12-22 | 1973-03-30 | Walbroehl H T | PROCEDURE AND FORMWORK FOR THE REALIZATION OF CONCRETE COATING OF GALLERIES, TUNNELS, WELLS, ETC. |
| CN101736860A (en) * | 2009-12-16 | 2010-06-16 | 沈阳建筑大学 | Circular cross-section steel-concrete-FRP solid composite column |
| CN106801611A (en) * | 2015-11-26 | 2017-06-06 | 山东科技大学 | A kind of deep tunnel supporting new concrete support |
| CN206707122U (en) * | 2017-03-10 | 2017-12-05 | 哈尔滨工业大学深圳研究生院 | A kind of concrete filled steel tube component of the steel tube confinement of sandwich |
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2018
- 2018-09-05 CN CN201811032583.0A patent/CN108930542B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| BE792501A (en) * | 1971-12-22 | 1973-03-30 | Walbroehl H T | PROCEDURE AND FORMWORK FOR THE REALIZATION OF CONCRETE COATING OF GALLERIES, TUNNELS, WELLS, ETC. |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593979A (en) * | 2020-11-17 | 2021-04-02 | 中煤科工集团北京华宇工程有限公司 | Roadway support device |
| CN113944485A (en) * | 2021-10-15 | 2022-01-18 | 中国建筑土木建设有限公司 | CFRP confined concrete arch frame |
| CN113944485B (en) * | 2021-10-15 | 2024-05-10 | 中国建筑土木建设有限公司 | CFRP confined concrete arch frame |
| CN114991810A (en) * | 2022-08-03 | 2022-09-02 | 山东建筑大学 | Composite supporting structure and construction method of wall rear mould bag grouting and high-strength support |
| CN114991810B (en) * | 2022-08-03 | 2022-11-22 | 山东建筑大学 | Composite supporting structure and construction method of wall rear mould bag grouting and high-strength support |
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| Publication number | Publication date |
|---|---|
| CN108930542B (en) | 2023-06-02 |
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