CN104895581A - Tunnel lining rapid repair structure based on carbon fiber woven mesh and repair method thereof - Google Patents
Tunnel lining rapid repair structure based on carbon fiber woven mesh and repair method thereof Download PDFInfo
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- CN104895581A CN104895581A CN201510270607.6A CN201510270607A CN104895581A CN 104895581 A CN104895581 A CN 104895581A CN 201510270607 A CN201510270607 A CN 201510270607A CN 104895581 A CN104895581 A CN 104895581A
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Abstract
The invention relates to a tunnel lining rapid repair structure based on a carbon fiber woven mesh and a repair method thereof. The tunnel lining rapid repair structure based on the carbon fiber woven mesh comprises self-propelled hollow grouting anchors, joist steel, the carbon fiber woven mesh, U-shaped hooks and a composite mortar layer. The joist steel is arranged on a tunnel lining to be repaired, one end of each self-propelled hollow grouting anchor stretches into the tunnel lining to be repaired in the radial direction of the tunnel lining to be repaired, the other end of each self-propelled hollow grouting anchor is connected with joist steel, the carbon fiber woven mesh is laid on the inner wall of the tunnel lining to be repaired and connected with the joist steel through the U-shaped hooks, and the composite mortar layer is sprayed on the inner surface of the carbon fiber woven mesh. The tunnel lining rapid repair structure based on the carbon fiber woven mesh and the repair method thereof aims to solve the problems existing in the existing tunnel lining reinforcing technology, the structure is reasonable in design, the mechanical property is good the steps of the method is simple, the operability is high, and the project cost is low.
Description
Technical field
The invention belongs to construction of tunnel disease prevention techniques field, relate to a kind of tunnel lining repair structure and restorative procedure, particularly relate to the quick repair structure of a kind of tunnel lining based on Carbon Fibre Textile and restorative procedure thereof.
Background technology
In recent years, along with the development of China's transport development cause, Highway Tunnel Construction progressively to growing up, buried future development, the situations such as its hydrogeology faced, surrounding rock type, topography and geomorphology become increasingly complex.For operation tunnel, the diseases such as along with the continuous growth of its operation time limit, tunnel engenders Lining cracks, percolating water, deformation intrude structure ambit, falls block, peels off, faulting of slab ends.According to national highway tunnel state of the art statistical result showed in 2012, existing operation tunnel 10022, linear meter(lin.m.) is long amounts to 8052.7km, the tunnel of water leakage defect is wherein had to account for about 65%, affect reach 3160 of tunnel operation because of the reason such as Lining cracks, percolating water, account for more than 30% of tunnel sum.According to incompletely statistics, China builds up the tunnel of more than 10 years, and about 80% exists the defect phenomenon such as Lining cracks, percolating water.These diseases not only affect the safety of driving in the normal use of electromechanical equipment in tunnel and life-span, threat tunnel, also can affect the durability of highway tunnel, shorten its application life, cause great economic loss.
Along with continuing to bring out of highway tunnel disease, the research for aspects such as tunnel defect control, lining reinforcement, reparations becomes a large hot issue gradually.At present, in the Defects Treatments such as tunnel lining cracking, percolating water, the means such as the surperficial shutoff of main employing, grouting for water plugging, pipe laying ejectment, though it to some extent solves above-mentioned disease, but because these process means have the technological deficiency of self, treatment effect is unsatisfactory, easily causes the recurrent exerbation of disease, and it is mainly used in the process of micro-, the little disease of tunnel lining; For tunnel lining local buckling, fall the comparatively serious disease such as block, faulting of slab ends, large area percolating water, existing common method is mainly cover arch reinforcing method, it can significantly improve liner structure supporting capacity on the one hand, on the other hand reconfigurable waterproof and water drainage system, thoroughly punishes percolating water, but generally reaches 15cm ~ 25cm due to cover arch of tunnel thickness, inevitable intrusion clearance of tunnel, and the duration is longer, need to suspend traffic for a long time, therefore its limitation is larger in actual applications.
In recent years, along with various building structure new material, the continuing to bring out of new technology, tunnel lining reinforcing means are abundanter, as outer sticking steel plate, paste FRP cloth, Carbon Fibre Textile Concrete Structure (TRC) etc., wherein TRC relies on it have the advantages such as good toughness, refractoriness, durability, thickness are little and be promoted gradually.Chinese patent ZL200910010259.3 discloses a kind of method of fiber knitted net and fine concrete reinforcing construction structure, it effectively can avoid the generation of building structure interface micro crack, effectively prevent interface delaminating damage, reliable to the reinforcing of building structure, simple, efficient and environmental protection, but it cannot produce effective mechanics consolidation effect for the tunnel lining that degree of disease is more serious, be only applicable to tunnel lining surface Defects Treatment.In a word, consider from the aspect such as mechanical property, economic benefit, existing tunnel lining reinforcement technology can not adapt to the development of construction of tunnel maintenance.
Summary of the invention
The object of the invention is to for Problems existing in existing tunnel lining reinforcement technology, the quick repair structure of a kind of tunnel lining based on Carbon Fibre Textile and restorative procedure are provided, this reasonable in design, mechanical property is good, and the step of method is simple, workable, construction costs is low.
For achieving the above object, the technical solution used in the present invention is:
The quick repair structure of tunnel lining based on Carbon Fibre Textile, is characterized in that: the quick repair structure of the described tunnel lining based on Carbon Fibre Textile comprises self-advancing type hollow grouting anchor, i iron, Carbon Fibre Textile, U-shaped hook and complex sand pulp layer; Described i iron is arranged in tunnel lining to be repaired; One end of described self-advancing type hollow grouting anchor is stretched in tunnel lining to be repaired along the radial direction of tunnel lining to be repaired, and the other end is connected with i iron; On the inwall that described Carbon Fibre Textile is laid on tunnel lining to be repaired and by U-shaped hook be arranged on i iron and be connected; The inner surface of described Carbon Fibre Textile sprays and has complex sand pulp layer.
As preferably, Carbon Fibre Textile of the present invention is one or more layers; Described complex sand pulp layer correspondence is also one or more layers; When described Carbon Fibre Textile is multilayer, described Carbon Fibre Textile and complex sand pulp layer are disposed alternately on the inwall of tunnel lining to be repaired.
As preferably, the inwall of tunnel lining to be repaired of the present invention is provided with groove, and described i iron is buried underground in a groove.
As preferably, self-advancing type hollow grouting anchor of the present invention comprises hollow full-thread bolt body, nut, stop grouting plug, backing plate and drill bit; Described hollow full-thread bolt body comprise front end and with the tail end away from front end; Described drill bit is arranged on the front end of hollow full-thread bolt body; Described nut, backing plate and stop grouting plug to be enclosed within successively on hollow full-thread bolt body and to be threaded with hollow full-thread bolt body; The radial direction of the front end edge tunnel lining to be repaired of described hollow full-thread bolt body stretches in tunnel lining to be repaired; The tail end of described hollow full-thread bolt body is connected with i iron.
As preferably, hollow full-thread bolt body diameter of the present invention is not less than Φ 28mm, and Kang La Qiang Du≤650MPa, length is not less than 3.5m.
As preferably, U-shaped hook of the present invention comprises the U-shaped hook of short pin; The short foot that the U-shaped hook of described short pin comprises U-shaped hook portion and is connected with U-shaped hook portion; The fiber bundle junction of described U-shaped hook portion and Carbon Fibre Textile, described short foot is connected with i iron.
As preferably, U-shaped hook of the present invention also comprises the U-shaped hook of long pin, and Carbon Fibre Textile is hooked in one end of the U-shaped hook of described long pin, and the other end stretches in tunnel lining to be repaired.
As preferably, the thickness of Carbon Fibre Textile of the present invention is not less than 0.167mm; In described Carbon Fibre Textile, the cross sectional area of single bundle carbon fiber is not less than 0.78mm
2.
Based on the quick repair structure of the foregoing tunnel lining based on Carbon Fibre Textile to a tunnel lining fast repairing method, it is characterized in that: said method comprising the steps of:
1) groove, process tunnel lining surface is applied: first at tunnel lining surface cutting two parallel joint-cuttings; Next cuts the concrete between two joint-cuttings, forms bottom surface and is plane and has the groove of certain depth; Brush scum silica frost in groove again, and clean up with water, dabbing process is carried out on the surface of tunnel lining to be repaired simultaneously, clean and remove concrete chip;
2) radial grouting is reinforced: in the groove of tunnel lining to be repaired, circumferentially set self-advancing type hollow grouting anchor, self-advancing type hollow grouting anchor is made radially to extend in the country rock of tunnel lining to be repaired behind, unload rig, stop grouting plug is installed, then by slurry filling machine, end of anchor rod is connected with grouting pump, pressure injection cement-silicate dual slurry, after slip casting completes, installs backing plate and nut; The volume ratio of described cement-silicate dual slurry is 1:0.6 ~ 1:1;
3) i iron is embedded: be embedded in groove by i iron, and welded with hollow full-thread bolt body afterbody by i iron;
4) first floor Carbon Fibre Textile is laid: at tunnel lining surface drilling to be repaired, to hole scum silica frost in rear water cleaning hole, and weld the U-shaped hook of short pin on the i iron edge of a wing, lay first floor Carbon Fibre Textile, make the U-shaped hook of short pin on the i iron edge of a wing catch on the fiber bundle junction of Carbon Fibre Textile; Then catch on Carbon Fibre Textile with the U-shaped hook one end of long pin, the other end inserts in boring, utilizes in epoxide-resin glue injection hole with the U-shaped hook of fixed length pin;
5) first floor composite mortar is sprayed: after the water-soaked of tunnel lining surface, the composite mortar prepared is ejected between first floor Carbon Fibre Textile and tunnel lining and the surface of Carbon Fibre Textile;
Described composite mortar is prepared from by portland cement, flyash, land plaster, glass bead, polypropylene fibre, SBR emulsion, sodium sulphate, aluminum sulfate, iron powder, water reducing agent and air entraining agent; In described composite mortar, the concrete match ratio of each component is portland cement: flyash: land plaster: glass bead: polypropylene fibre: SBR emulsion: sodium sulphate: aluminum sulfate: iron powder: water reducing agent: air entraining agent=80:20:60:30:3:1:1:1:2:3:3;
6) lay second layer Carbon Fibre Textile, spray second layer composite mortar: before first floor composite mortar solidifies, lay second layer Carbon Fibre Textile, catch on Carbon Fibre Textile with the U-shaped hook one end of short pin, the other end inserts in first floor composite mortar, sprays second layer composite mortar;
7) composite mortar maintenance: at composite mortar surface sprinkling membrane curing solution, maintenance is to the length of time.
As preferably, step 5 of the present invention) in injection composite mortar before, first with epoxy resin, Carbon Fibre Textile is flooded, fine sand is sprayed again at Carbon Fibre Textile surface uniform, this fine sand particle diameter is 0.5mm ~ 0.8mm, and every square meter Carbon Fibre Textile sprays fine sand and is about 1.3kg ~ 1.5kg.
Advantage of the present invention is:
The invention provides the quick repair structure of a kind of tunnel lining based on Carbon Fibre Textile and restorative procedure thereof, this tunnel lining repair structure is by setting self-advancing type hollow grouting anchor, and Strengthening Tunnel country rock on the one hand, improves country rock globality and stability; On the other hand slurries are filled with intergranular hole and consolidation by compacted and slabbing action, thus space in shutoff tunnel surrounding, crack isotonic water passage, reduce the water permeability of country rock, reduce external hydraulic pressure upon tunnel lining.The present invention utilizes i iron, Carbon Fibre Textile, composite mortar to reinforce tunnel lining, the advantage such as the lateral rigidity both having played i iron is large, bending resistance is strong, has played again strong, the advantage such as bearing capacity is high, good endurance, lightweight, cold-proof fireproof performance are good of toughness of Carbon Fibre Textile, composite mortar.In sum, when this structure is applied to tunnel lining structure reinforcing, both from macroscopically having carried out mechanics reinforcing to tunnel surrounding and liner structure, having avoided tunnel lining surface to occur shearing stripping damage from microcosmic again, and having realized repairing tunnel lining structure comprehensively, thoroughly, fast.The present invention has the advantages such as construction sequence is simple, workable, construction costs is lower, supporting capacity is strong, mechanical property is good, and can be faster and better repair tunnel lining, has good Social benefit and economic benefit.The present invention's self-strength that improve tunnel surrounding by a relatively large margin and self-stable ability; Reduce the water permeability of country rock, reduce external hydraulic pressure upon tunnel lining; Effective mechanical property improving tunnel lining structure, improves its resistance to overturning; Effectively avoid tunnel lining surface to occur shearing stripping damage, improve its antifreeze fireproof performance; Improve safety and the durability of tunnel operation phase.
Accompanying drawing explanation
Fig. 1 is the structural representation of the quick repair structure of the tunnel lining based on Carbon Fibre Textile provided by the present invention;
Fig. 2 is the structural representation of self-advancing type hollow grouting anchor of the present invention;
Fig. 3 is the top view of the quick repair structure of the tunnel lining based on Carbon Fibre Textile provided by the present invention;
Fig. 4 is interconnective structural representation between i iron of the present invention and Carbon Fibre Textile;
Fig. 5 is the structural representation of the U-shaped hook of long pin of the present invention;
Fig. 6 is the structural representation of the U-shaped hook of short pin of the present invention;
Description of reference numerals is as follows:
1-tunnel lining; 2-self-advancing type hollow grouting anchor; 21-hollow full-thread bolt body; 22-nut; 23-backing plate; 24-stop grouting plug; 25-drill bit; 3-i iron; 4-Carbon Fibre Textile; 5-composite mortar; 6-groove; The U-shaped hook of the long pin of 71-; The U-shaped hook of the short pin of 72-.
Detailed description of the invention
The quick repair structure of tunnel lining based on Carbon Fibre Textile, should comprise self-advancing type hollow grouting anchor, i iron, Carbon Fibre Textile, U-shaped hook and complex sand pulp layer based on the quick repair structure of tunnel lining of Carbon Fibre Textile; I iron is arranged in tunnel lining to be repaired; One end of self-advancing type hollow grouting anchor is stretched in tunnel lining to be repaired along the radial direction of tunnel lining to be repaired, and the other end is connected with i iron; On the inwall that Carbon Fibre Textile is laid on tunnel lining to be repaired and by U-shaped hook be arranged on i iron and be connected; The inner surface of Carbon Fibre Textile sprays and has complex sand pulp layer.
Carbon Fibre Textile is one or more layers; Complex sand pulp layer correspondence is also one or more layers; When Carbon Fibre Textile is multilayer, Carbon Fibre Textile and complex sand pulp layer are disposed alternately on the inwall of tunnel lining to be repaired.
The inwall of tunnel lining to be repaired is provided with groove, and i iron is buried underground in a groove.
Self-advancing type hollow grouting anchor comprises hollow full-thread bolt body, nut, stop grouting plug, backing plate and drill bit; Hollow full-thread bolt body comprise front end and with the tail end away from front end; Drill bit is arranged on the front end of hollow full-thread bolt body; Nut, backing plate and stop grouting plug to be enclosed within successively on hollow full-thread bolt body and to be threaded with hollow full-thread bolt body; The radial direction of the front end edge tunnel lining to be repaired of hollow full-thread bolt body stretches in tunnel lining to be repaired; The tail end of hollow full-thread bolt body is connected with i iron.Hollow full-thread bolt body diameter is not less than Φ 28mm, and Kang La Qiang Du≤650MPa, length is not less than 3.5m.
U-shaped hook comprises the U-shaped hook of short pin and the U-shaped hook of long pin; The short foot that the U-shaped hook of short pin comprises U-shaped hook portion and is connected with U-shaped hook portion; The fiber bundle junction of U-shaped hook portion and Carbon Fibre Textile, short foot is connected with i iron; Carbon Fibre Textile is hooked in one end of the U-shaped hook of long pin, and the other end stretches in tunnel lining to be repaired.
The thickness of Carbon Fibre Textile is not less than 0.167mm; In Carbon Fibre Textile, the cross sectional area of single bundle carbon fiber is not less than 0.78mm
2.
Based on the quick repair structure of the foregoing tunnel lining based on Carbon Fibre Textile to a tunnel lining fast repairing method, the method comprises the following steps:
1) groove, process tunnel lining surface is applied: first at tunnel lining surface cutting two parallel joint-cuttings; Next cuts the concrete between two joint-cuttings, forms bottom surface and is plane and has the groove of certain depth; Brush scum silica frost in groove again, and clean up with water, dabbing process is carried out on the surface of tunnel lining to be repaired simultaneously, clean and remove concrete chip;
2) radial grouting is reinforced: in the groove of tunnel lining to be repaired, circumferentially set self-advancing type hollow grouting anchor, self-advancing type hollow grouting anchor is made radially to extend in the country rock of tunnel lining to be repaired behind, unload rig, stop grouting plug is installed, then by slurry filling machine, end of anchor rod is connected with grouting pump, pressure injection cement-silicate dual slurry, after slip casting completes, installs backing plate and nut; The volume ratio of cement-silicate dual slurry is 1:0.6 ~ 1:1;
3) i iron is embedded: be embedded in groove by i iron, and welded with hollow full-thread bolt body afterbody by i iron;
4) first floor Carbon Fibre Textile is laid: at tunnel lining surface drilling to be repaired, to hole scum silica frost in rear water cleaning hole, and weld the U-shaped hook of short pin on the i iron edge of a wing, lay first floor Carbon Fibre Textile, make the U-shaped hook of short pin on the i iron edge of a wing catch on the fiber bundle junction of Carbon Fibre Textile; Then catch on Carbon Fibre Textile with the U-shaped hook one end of long pin, the other end inserts in boring, utilizes in epoxide-resin glue injection hole with the U-shaped hook of fixed length pin;
5) first floor composite mortar is sprayed: after the water-soaked of tunnel lining surface, the composite mortar prepared is ejected between first floor Carbon Fibre Textile and tunnel lining and the surface of Carbon Fibre Textile;
Composite mortar is prepared from by portland cement, flyash, land plaster, glass bead, polypropylene fibre, SBR emulsion, sodium sulphate, aluminum sulfate, iron powder, water reducing agent and air entraining agent; In composite mortar, the concrete match ratio of each component is portland cement: flyash: land plaster: glass bead: polypropylene fibre: SBR emulsion: sodium sulphate: aluminum sulfate: iron powder: water reducing agent: air entraining agent=80:20:60:30:3:1:1:1:2:3:3;
6) lay second layer Carbon Fibre Textile, spray second layer composite mortar: before first floor composite mortar solidifies, lay second layer Carbon Fibre Textile, catch on Carbon Fibre Textile with the U-shaped hook one end of short pin, the other end inserts in first floor composite mortar, sprays second layer composite mortar;
7) composite mortar maintenance: at composite mortar surface sprinkling membrane curing solution, maintenance is to the length of time.
Step 5) in injection composite mortar before, first with epoxy resin, Carbon Fibre Textile is flooded, spray fine sand at Carbon Fibre Textile surface uniform again, this fine sand particle diameter is 0.5mm ~ 0.8mm, and every square meter Carbon Fibre Textile sprays fine sand and is about 1.3kg ~ 1.5kg.
Below in conjunction with accompanying drawing and specific embodiment, structure of the present invention and restorative procedure thereof are described in further detail:
Embodiment:
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, the quick repair structure of a kind of tunnel lining based on Carbon Fibre Textile is primarily of compositions such as tunnel lining 1, self-advancing type hollow grouting anchor 2, i iron 3, Carbon Fibre Textile 4, composite mortar 5, groove 6 and U-shaped hooks.
Groove 6 is arranged in tunnel lining 1, and its width is preferably 10cm, and the degree of depth is preferably 20cm, and it is preferably 1.5m ~ 2.0m along tunnel axis direction spacing.
Self-advancing type hollow grouting anchor 2 is arranged in groove 6, its circumferential distance is preferably 0.5m, it is made up of hollow full-thread bolt body 21, nut 22, stop grouting plug 24, backing plate 23, drill bit 25 etc., this hollow full-thread bolt body 21 external diameter is preferably Φ 28mm, Kang La Qiang Du≤650MPa, length is preferably 3.5m, and grouting serous fluid should adopt cement-silicate dual slurry, and the two volume ratio is preferably 1:0.6 ~ 1:1.
I iron 3 is arranged in groove 6, and its model is preferably I18, and its depth of section is preferably 180mm, and the wing is wide is preferably 94mm, and the wing is thick is preferably 10.7mm, and abdominal depth is preferably 6.5mm.
Carbon Fibre Textile 4 thickness is preferably 0.167mm, and net interfascicular is apart from being 10mm, and single fiber-bundles cross sectional area is 0.78mm
2.
Carbon Fibre Textile 4, before injection composite mortar 5, is first flooded with epoxy resin, then sprays fine sand, to improve the pulling capacity of Carbon Fibre Textile and the adhesive property between Carbon Fibre Textile and matrix at its surface uniform.
Composite mortar 5 is made up of portland cement, flyash, land plaster, glass bead, polypropylene fibre, SBR emulsion, sodium sulphate, aluminum sulfate, iron powder, water reducing agent, air entraining agent, and the concrete match ratio of each component is portland cement: flyash: land plaster: glass bead: polypropylene fibre: SBR emulsion: sodium sulphate: aluminum sulfate: iron powder: water reducing agent: air entraining agent=80:20:60:30:3:1:1:1:2:3:3.
See Fig. 5 and Fig. 6, U-shaped hook is divided into the U-shaped hook of long pin 71 and the U-shaped hook 72 of short pin, and the U-shaped hook 71 of long pin is respectively 6mm and 50mm from top to two pin segment length, and the U-shaped hook 72 of short pin is respectively 6mm and 15mm from top to two pin segment length.
The restorative procedure of the quick repair structure of above-mentioned a kind of tunnel lining based on Carbon Fibre Textile, the steps include:
A. groove, process tunnel lining surface is applied: first cut two parallel joint-cuttings with professional concrete cutting machine on tunnel lining surface, kerf spacing is 10cm, secondly the concrete between two joint-cuttings is cut with clink, formation bottom surface is plane, the degree of depth is the groove of 20cm, scum silica frost in groove is brushed again with wire brush, and clean up with water, utilize high pressure pneumatic hammer that dabbing process is carried out on tunnel lining surface simultaneously, clean and remove concrete chip;
B. radial grouting is reinforced: in tunnel lining groove, circumferentially set self-advancing type hollow grouting anchor, it is made radially to extend in the country rock of lining cutting behind, unload rig, stop grouting plug is installed, then by slurry filling machine, end of anchor rod is connected with grouting pump, pressure injection cement-silicate dual slurry, after slip casting completes, installs backing plate and nut;
C. embed i iron: be embedded in groove by i iron, and make it weld with hollow full-thread bolt body afterbody;
D. first floor Carbon Fibre Textile is laid: at tunnel lining surface drilling, pitch of holes is preferably 20mm, aperture is preferably 6mm, hole depth is preferably 30mm, to hole scum silica frost in rear water cleaning hole, and weld the U-shaped hook of short pin on the i iron edge of a wing, its hoop interval 20mm, lay first floor Carbon Fibre Textile, the U-shaped hook of short pin on the i iron edge of a wing is made to catch on the fiber bundle junction of Carbon Fibre Textile, then catch on Carbon Fibre Textile with the U-shaped hook one end of long pin, the other end inserts boring, utilizes in epoxide-resin glue injection hole with fixing U-shaped hook;
E. first floor composite mortar is sprayed: after the water-soaked of tunnel lining surface, be ejected between first floor Carbon Fibre Textile and tunnel lining by the composite mortar prepared, and the surface of Carbon Fibre Textile, this layer of composite mortar layer thickness is preferably 5mm;
F. lay second layer Carbon Fibre Textile, spray second layer composite mortar: before first floor composite mortar solidifies, lay second layer Carbon Fibre Textile, Carbon Fibre Textile is caught on the U-shaped hook one end of short pin, the other end inserts in first floor composite mortar, spray second layer composite mortar, this layer of composite mortar layer thickness is preferably 3mm;
G. composite mortar maintenance: at composite mortar surface sprinkling membrane curing solution, maintenance is to the length of time.
From Fig. 1,3, self-advancing type hollow grouting anchor 2 one aspect Strengthening Tunnel country rock, improves country rock globality and stability; On the other hand slurries are filled with intergranular hole and consolidation by compacted and slabbing action, thus space in shutoff tunnel surrounding, crack isotonic water passage, reduce the water permeability of country rock, reduce tunnel lining 1 external water pressure.Meanwhile, by welding of self-advancing type hollow grouting anchor 2 and i iron 3, improve the globality of this lining cutting repair structure, make its mechanical property more stable.U-shaped hook is utilized to be connected with Carbon Fibre Textile 4 by i iron 3, spray composite mortar 5 again, the advantage such as the lateral rigidity both having played i iron 3 is large, bending resistance is strong, the advantage such as the toughness having played again Carbon Fibre Textile 4 and composite mortar 5 is strong, bearing capacity is high, good endurance, lightweight, cold-proof fireproof performance are good.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to most preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. based on the quick repair structure of tunnel lining of Carbon Fibre Textile, it is characterized in that: the quick repair structure of the described tunnel lining based on Carbon Fibre Textile comprises self-advancing type hollow grouting anchor, i iron, Carbon Fibre Textile, U-shaped hook and complex sand pulp layer; Described i iron is arranged in tunnel lining to be repaired; One end of described self-advancing type hollow grouting anchor is stretched in tunnel lining to be repaired along the radial direction of tunnel lining to be repaired, and the other end is connected with i iron; On the inwall that described Carbon Fibre Textile is laid on tunnel lining to be repaired and by U-shaped hook be arranged on i iron and be connected; The inner surface of described Carbon Fibre Textile sprays and has complex sand pulp layer.
2. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 1, is characterized in that: described Carbon Fibre Textile is one or more layers; Described complex sand pulp layer correspondence is also one or more layers; When described Carbon Fibre Textile is multilayer, described Carbon Fibre Textile and complex sand pulp layer are disposed alternately on the inwall of tunnel lining to be repaired.
3. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 2, is characterized in that: the inwall of described tunnel lining to be repaired is provided with groove, and described i iron is buried underground in a groove.
4. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 1 or 2 or 3, is characterized in that: described self-advancing type hollow grouting anchor comprises hollow full-thread bolt body, nut, stop grouting plug, backing plate and drill bit; Described hollow full-thread bolt body comprise front end and with the tail end away from front end; Described drill bit is arranged on the front end of hollow full-thread bolt body; Described nut, backing plate and stop grouting plug to be enclosed within successively on hollow full-thread bolt body and to be threaded with hollow full-thread bolt body; The radial direction of the front end edge tunnel lining to be repaired of described hollow full-thread bolt body stretches in tunnel lining to be repaired; The tail end of described hollow full-thread bolt body is connected with i iron.
5. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 4, is characterized in that: described hollow full-thread bolt body diameter is not less than Φ 28 mm, and Kang La Qiang Du≤650 MPa, length is not less than 3.5 m.
6. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 5, is characterized in that: described U-shaped hook comprises the U-shaped hook of short pin; The short foot that the U-shaped hook of described short pin comprises U-shaped hook portion and is connected with U-shaped hook portion; The fiber bundle junction of described U-shaped hook portion and Carbon Fibre Textile, described short foot is connected with i iron.
7. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 6, it is characterized in that: described U-shaped hook also comprises the U-shaped hook of long pin, Carbon Fibre Textile is hooked in one end of the U-shaped hook of described long pin, and the other end stretches in tunnel lining to be repaired.
8. the quick repair structure of the tunnel lining based on Carbon Fibre Textile according to claim 7, is characterized in that: the thickness of described Carbon Fibre Textile is not less than 0.167 mm; In described Carbon Fibre Textile, the cross sectional area of single bundle carbon fiber is not less than 0.78 mm
2.
9. based on the quick repair structure of the tunnel lining based on Carbon Fibre Textile as claimed in claim 8 to a tunnel lining fast repairing method, it is characterized in that: said method comprising the steps of:
1) groove, process tunnel lining surface is applied: first at tunnel lining surface cutting two parallel joint-cuttings; Next cuts the concrete between two joint-cuttings, forms bottom surface and is plane and has the groove of certain depth; Brush scum silica frost in groove again, and clean up with water, dabbing process is carried out on the surface of tunnel lining to be repaired simultaneously, clean and remove concrete chip;
2) radial grouting is reinforced: in the groove of tunnel lining to be repaired, circumferentially set self-advancing type hollow grouting anchor, self-advancing type hollow grouting anchor is made radially to extend in the country rock of tunnel lining to be repaired behind, unload rig, stop grouting plug is installed, then by slurry filling machine, end of anchor rod is connected with grouting pump, pressure injection cement-silicate dual slurry, after slip casting completes, installs backing plate and nut; The volume ratio of described cement-silicate dual slurry is 1:0.6 ~ 1:1;
3) i iron is embedded: be embedded in groove by i iron, and welded with hollow full-thread bolt body afterbody by i iron;
4) first floor Carbon Fibre Textile is laid: at tunnel lining surface drilling to be repaired, to hole scum silica frost in rear water cleaning hole, and weld the U-shaped hook of short pin on the i iron edge of a wing, lay first floor Carbon Fibre Textile, make the U-shaped hook of short pin on the i iron edge of a wing catch on the fiber bundle junction of Carbon Fibre Textile; Then catch on Carbon Fibre Textile with the U-shaped hook one end of long pin, the other end inserts in boring, utilizes in epoxide-resin glue injection hole with the U-shaped hook of fixed length pin;
5) first floor composite mortar is sprayed: after the water-soaked of tunnel lining surface, the composite mortar prepared is ejected between first floor Carbon Fibre Textile and tunnel lining and the surface of Carbon Fibre Textile;
Described composite mortar is prepared from by portland cement, flyash, land plaster, glass bead, polypropylene fibre, SBR emulsion, sodium sulphate, aluminum sulfate, iron powder, water reducing agent and air entraining agent; In described composite mortar, the concrete mass ratio of each component is portland cement: flyash: land plaster: glass bead: polypropylene fibre: SBR emulsion: sodium sulphate: aluminum sulfate: iron powder: water reducing agent: air entraining agent=80:20:60:30:3:1:1:1:2:3:3;
6) lay second layer Carbon Fibre Textile, spray second layer composite mortar: before first floor composite mortar solidifies, lay second layer Carbon Fibre Textile, catch on Carbon Fibre Textile with the U-shaped hook one end of short pin, the other end inserts in first floor composite mortar, sprays second layer composite mortar;
7) composite mortar maintenance: at composite mortar surface sprinkling membrane curing solution, maintenance is to the length of time.
10. method according to claim 9, it is characterized in that: in described step 5) before injection composite mortar, first with epoxy resin, Carbon Fibre Textile is flooded, fine sand is sprayed again at Carbon Fibre Textile surface uniform, described fine sand particle diameter is 0.5mm ~ 0.8mm, and it is 1.3kg ~ 1.5kg that every square metre of Carbon Fibre Textile sprays fine sand.
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