CN108426103A - A kind of UHPC-SS compound pipeline complex pipelines and preparation method thereof - Google Patents
A kind of UHPC-SS compound pipeline complex pipelines and preparation method thereof Download PDFInfo
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- CN108426103A CN108426103A CN201810444516.3A CN201810444516A CN108426103A CN 108426103 A CN108426103 A CN 108426103A CN 201810444516 A CN201810444516 A CN 201810444516A CN 108426103 A CN108426103 A CN 108426103A
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- pipeline complex
- stainless
- complex pipelines
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 54
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 46
- 239000010935 stainless steel Substances 0.000 claims abstract description 46
- 239000004567 concrete Substances 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000002787 reinforcement Effects 0.000 claims abstract description 19
- 235000013312 flour Nutrition 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 235000013339 cereals Nutrition 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 239000010779 crude oil Substances 0.000 abstract 1
- 239000003345 natural gas Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 26
- 238000010586 diagram Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000010963 304 stainless steel Substances 0.000 description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004574 high-performance concrete Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 101100008044 Caenorhabditis elegans cut-1 gene Proteins 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/153—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/42—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A kind of UHPC SS compound pipeline complex pipelines and preparation method thereof, composition include：Stainless-steel pipe, the stainless-steel pipe outside have poured UHPC concrete layers, bar-mat reinforcement are equipped in the UHPC concrete layers.UHPC concrete layer raw material components are cement 25 30%, silica flour 5 15%, silica flour 3.5 13.5%, the fine sand 30 50% of 1.6 3.7mm of grain size, the steel fibre 3 9% of length 8mm, water 3.4 9.4% by mass fraction；Raw material stirs after-pouring in stainless steel inner tube outer surface, is subject to jolt ramming using shaking platform after the completion；Then hot water maintenance is carried out to UHPC SS compound pipeline complex pipelines, is conserved 3 days using 80 DEG C of water termostats.Three kinds of connection types are devised to pipe joint.For the present invention using stainless steel as inner tube, ultra-high performance concrete solves the problems, such as that existing crude oil, natural gas, harmful influence conveyance conduit is perishable, frost resistance is poor, durability is poor, cost is high as outer tube.
Description
Technical field
The present invention relates to pipe technology field, more particularly to a kind of UHPC-SS compound pipeline complex pipelines and preparation method thereof.
Background technology
Existing oil, the conveyance conduit containing petrolic solvent, gasoline, harmful influence are steel pipe, and common steel tube easily gets rusty, and is easy
It reacts with composition is corroded contained in oil, is also easy to occur with the corrosive substance (water, chlorion etc.) in natural environment
Chemical reaction, causes the short life of pipeline, maintaining of high cost；And the heat-insulating property of steel pipe itself is very poor, and oil etc.
Liquid is both needed to ensure could have good mobile performance at a certain temperature, when the temperature of the surroundings is low, it usually needs right
Steel pipe takes heat preservation even heating measures, to ensure the normal operation of pipeline transportation.
Ultra-high performance concrete, abbreviation UHPC (Ultra-HighPerformance Concrete),
" ultra-high performance concrete " includes two aspects " superelevation " --- the durability of superelevation and the mechanical properties of superelevation.It is super
The design theory of high performance concrete is that maximum bulk density is theoretical (maximumpackingdensity), and composition material is not
Closestpacking is formed with optimal proportion with particles.I.e. the gap of millimeter grade particles (aggregate) accumulation is by micron particles
(cement, flyash, miberal powder) is filled, and the gap of micron particles accumulation is filled by submicron particles (silicon ash).UHPC at present
More viscous, vibration compacting is more difficult, is also inconvenient for cast-in-place application.In addition, the aggregate that beautiful, Fa Deng states UHPC match ratios are selected
It is the sand of particle size range 0.15mm~0.6mm, for improving bulk density.The fineness modulus range of China's building sand is 1.6
~3.7, particle size range 0.15mm~5mm.This makes UHPC on a large scale using being restricted.Stainless steel abbreviation SS
(Stainless Steel), stainless steel refer to the chemical etchings such as the weak corrosive medium such as resistance to air, steam, water and acid, alkali, salt Jie
The steel of matter corrosion, also known as stainless acid resistant steel.Stainless steel not only refers to merely a kind of steel, but indicates more than 100 kinds of industry
Steel, each stainless steel developed are with good performance in its specific application field because the alloying element contained by it is different.
The conveyance conduit use of the current transporting petroleum in China, harmful influence is still that common steel tube inner wall adds corrosion-inhibiting coating
Method.Advantage is that laying speed is fast, and disadvantage includes mainly：Maintenance cost is high, perishable, short life, frost resistance are poor.
Invention content
In order to overcome the problems of the above-mentioned prior art, the object of the present invention is to provide a kind of UHPC-SS compound pipeline complex pipelines
And preparation method thereof, using stainless steel as inner tube, UHPC concrete as outer tube, due to the two temperature linear expansion coefficient very
It is close, solve the problems, such as that existing pipeline easily corrodes leakage, cost height, maintenance cost height, poor thermal insulation property.
In order to achieve the above object, the technical scheme is that：
A kind of UHPC-SS compound pipeline complex pipelines, composition include：Stainless-steel pipe, the stainless-steel pipe outside have poured
UHPC concrete layers, the UHPC concrete layers are interior to be equipped with bar-mat reinforcement.
The WELDING STUDS across bar-mat reinforcement is equipped between the UHPC concrete layers and stainless-steel pipe.
The stainless-steel pipe model uses 304, internal diameter 300-1000mm, wall thickness 1.5-4mm.
The concrete wall thickness of the UHPC concrete layers is 20-50mm.
Pipe joint mode that there are three types of connections between the UHPC-SS compound pipeline complex pipelines, respectively cast-type pipe joint,
Assembled pipeline connector and grouting formula pipe joint.
Based on the production method of above-mentioned UHPC-SS compound pipeline complex pipelines,
Step 1：It is by mass fraction by raw material components：Cement 25-30%, silica flour 5-15%, silica flour 3.5-
13.5%, the fine sand 30-50% of grain size 1.6-3.7mm, the steel fibre 3-9% of length 8mm, water 3.4-9.4%, polycarboxylic acids diminishing
The UHPC-SS compound pipeline complex pipeline raw materials that agent 0.8-1.5% makes carry out action of forced stirring with forced mixer, and mixing time 10~
15 minutes, 20 revs/min of mixing speed；
Step 2：It is cast in the stainless steel inner tube outer surface with WELDING STUDS and bar-mat reinforcement, it is flat using vibration after the completion
Platform is subject to jolt ramming；
Step 3：Hot water maintenance is carried out to UHPC, is conserved 3 days using 80 DEG C of water termostats.
Beneficial effects of the present invention：
The present invention can be used for oil, the conveying containing petrolic solvent, gasoline, harmful influence.Contain sulfide in oil, due to
UHPC-SS compound pipeline complex pipeline internal layers are stainless steel, and the erosion composition in basic oil of getting along well reacts；Outer layer is UHPC coagulations
Soil, intensity is high, and durability is good, plays a protective role to inner layer stainless steel tube and (is similar to protective layer), and increases entire pipeline
Rigidity, and since its compression strength is high, close to steel, the design thickness of inner layer stainless steel tube, saving construction cost can be reduced；Outside
The UHPC concrete of layer can improve the thermal and insulating performance of pipeline entirety, be conducive to the normal operation of pipeline transportation；
Due to can be arranged between outer layer UHPC and inner layer stainless steel tube anchoring piece (WELDING STUDS) increase both work together and
The ability of stress.
UHPC used in the present invention is by pair with high performance concrete, common concrete material and hot-strip performance
Than showing that UHPC materials are compared with common coagulation and have superior mechanical property, compression strength has been even more than common iron
Intensity.
Description of the drawings
Fig. 1 is the structure section schematic diagram of UHPC-SS compound pipeline complex pipelines of the present invention.
Fig. 2 is cast-type structural joint schematic diagram of the present invention.
Fig. 3 is assembled structure connector schematic diagram of the present invention.
Fig. 4 is exterior seal ring schematic diagram used in assembled structure connector of the present invention.
Fig. 5 is inner seal ring schematic diagram used in assembled structure connector of the present invention.
Fig. 6 is grouting formula structural joint schematic diagram of the present invention.
Fig. 7 is pipe end flange disk used in grouting formula structural joint of the present invention.
Fig. 8 is the lateral ultimate load experiment load schematic diagram of pipeline.
In figure：1. stainless steel inner tube；2.UHPC concrete layers；3. bar-mat reinforcement；4. WELDING STUDS；5. embedded bar；6. stainless
Steel inner tube weld seam；7. cast-in-place UHPC concrete；8. pipe end spill ring flange；9. exterior seal ring；10. pipe end convex ring flange；11.
Preformed hole；12. high-strength bolt；13. inner seal ring；14. reinforcing bar；15. UHPC mortars are perfused；16. pipe end flange disk
Specific implementation mode
Embodiment one
Referring to Fig.1, a kind of UHPC-SS compound pipeline complex pipelines, composition include：Stainless steel inner tube 1, outside the stainless steel inner tube 1
Side has poured UHPC concrete layers 2, is equipped with bar-mat reinforcement 3 in the UHPC concrete layers 2, the UHPC concrete layers 2 with it is stainless
WELDING STUDS 4 is equipped between steel steel pipe 1, the WELDING STUDS 4 passes through bar-mat reinforcement 3.
The stainless steel inner tube 1 uses 304 stainless steel tubes, wall thickness 1.5mm, internal diameter 300mm；The compound pipeline complex pipeline is using section
Section is prefabricated, and per segment length 5m, the compound pipeline complex pipeline both ends are equipped with embedded bar 5 and stainless steel inner tube 1 for structural joint.
With reference to Fig. 2, the structural joint of the present embodiment uses cast-type pipe joint, and erecting bed compound pipeline complex pipeline navigates to pre-
Positioning postpones, and is overlapped first using binding or welding manner to embedded bar 5 at two composite tube joints that connect, then
Welding is carried out to two stainless steel inner tubes, 1 abutted surface and forms stainless steel inner tube weld seam 6, finally docks 1 outside of head section stainless steel inner tube
The connection between UHPC concrete sevens completion compound pipeline complex pipeline is poured, protective layer can be arranged in outermost layer as needed.
UHPC concrete layer constituent mass numbers are：Cement 25%, silica flour 11.6%, silica flour 13.5%, fine sand 30%,
Steel fibre 9%, water 9.4%, polycarboxylate water-reducer 1.5%.
Based on the production method of above-mentioned UHPC-SS compound pipeline complex pipelines, by the UHPC-SS compound pipeline complex pipelines that said ratio makes,
In UHPC need to carry out action of forced stirring, mixing time 15 minutes, 20 revs/min of mixing speed with forced mixer；It pours
In 1 outer surface of stainless steel inner tube with WELDING STUDS 4 and bar-mat reinforcement 3, jolt ramming is subject to using shaking platform after the completion, to exclude
Bubble reduces porosity, and unusable vibrating spear vibrates, in order to avoid influencing fiber direction, reduces tensile property；Then
Hot water maintenance is carried out to UHPC, is conserved 3 days using 80 DEG C of water termostats.
With reference to Fig. 8, in order to study the basic mechanical performance of the present embodiment finished product, first to the UHPC concrete of the formula into
Resistance to compression and splitting tensile test are gone.
Test result is shown：1, in cube compression test, the compression strength mean value of 12 test blocks is in 150MPa or so, mesh
Common concrete crushing strength is 30~80MPa in preceding building.2, cube tensile splitting strength mean value is in 17MPa or so,
The tensile splitting strength mean value of normal concrete is 2~4MPa at present.Resistance to compression and splitting tensile test show that the present embodiment uses
Match ratio and defined pour and UHPC mechanical performance of concrete that maintenance process is produced is much better than normal concrete.
On the basis of mechanical property is verified, two groups of UHPC-SS compound pipeline complex pipelines are prepared according to this programme, are carried out lateral
Ultimate load is tested.Compound pipeline complex pipeline test method uses《JC+538-1994 asbestos cements downpipe, drainpipe and connector》Standard
Test method.Load test, by steel filler strip 19 and rubber pad 18, power is delayed as shown in figure 8, under the action of imposed load 17
Slowly it is applied on compound pipeline complex pipeline, the setting of wherein channel steel 20 is to provide for the angle of power transmission.
WELDING STUDS 4 and bar-mat reinforcement 3 are not arranged for first group of UHPC-SS compound pipeline complex pipeline, obtain maximum lateral extreme load mean value
For 42kN；Second group of UHPC-SS compound pipeline complex pipeline is provided with WELDING STUDS 4 and bar-mat reinforcement 3, carries out lateral extreme loading test, obtains
Maximum lateral extreme load mean value is 140kN.As it can be seen that the UHPC-SS compound pipeline complex pipelines of the present embodiment are in setting WELDING STUDS and reinforcing bar
On the basis of net, resists lateral load ability and be highly improved.
In addition the very smooth densification of the finished appearance obtained by the present embodiment, intensity and durability are superior to normal concrete
Test specimen.
Embodiment two
Referring to Fig.1, a kind of UHPC-SS compound pipeline complex pipelines, composition include：Stainless-steel pipe 1, outside the stainless-steel pipe 1
Side has poured UHPC concrete layers 2, has bar-mat reinforcement 3 in the UHPC concrete layers 2, the UHPC concrete layers 2 with it is stainless
There is WELDING STUDS 4, the WELDING STUDS 4 to pass through bar-mat reinforcement 3 between steel steel pipe 1.
The stainless steel inner tube 1 uses 304 stainless steel tubes, wall thickness 1.5mm, internal diameter 300mm；The compound pipeline complex pipeline is using section
Section is prefabricated, and per segment length 5m, the compound pipeline complex pipeline both ends are equipped with spill ring flange 8 or convex ring flange for structural joint
10, the spill ring flange 8 and convex ring flange 10 using UHPC concrete and compound pipeline complex pipeline it is common it is prefabricated form, and equipped in advance
Box out 11.
With reference to Fig. 3, the present embodiment structural joint uses assembled pipeline connector, and the assembled pipeline connector is by spill method
Blue disk 8, convex ring flange 10, exterior seal ring 9, inner seal ring 13 and bolt 12 form.
With reference to Fig. 4, Fig. 5, the exterior seal ring 9 and inner seal ring 13 are made of copper sheet, and are equipped with preformed hole 11.Peace
After the live compound pipeline complex pipeline of dress navigates to precalculated position, inner seal ring 13 and exterior seal ring 9 are placed into precalculated position first, then
By high-strength bolt 12 sequentially pass through spill ring flange 8, exterior seal ring 9, convex ring flange 10 preformed hole 11 be attached, complete
Connection between compound pipeline complex pipeline.Protective layer can be arranged in outermost layer as needed.
UHPC concrete layer constituent mass numbers are：Cement 27%, silica flour 5%, silica flour 8.5%, fine sand 50%, steel are fine
Dimension 6%, water 6.4%, polycarboxylate water-reducer 1.1%.
Based on the production method of above-mentioned UHPC-SS compound pipeline complex pipelines, making UHPC-SS compound pipeline complex pipeline raw materials by said ratio needs
Action of forced stirring, mixing time 10 minutes, 20 revs/min of mixing speed are carried out with forced mixer；It is cast in shearing
1 outer surface of stainless steel inner tube of nail 4 and bar-mat reinforcement 3, is subject to jolt ramming using shaking platform after the completion, reduces hole to exclude bubble
Gap rate, unusable vibrating spear vibrate, in order to avoid influencing fiber direction, reduce tensile property；Then to UHPC through row
Hot water conserves, and is conserved 3 days using 80 DEG C of water termostats.
With reference to Fig. 8, according to the proportioning in this example, the lateral extreme load mean value for obtaining UHPC-SS compound pipeline complex pipelines exists
153kN or so.The raising of content of steel fiber so that crack developing speed is retarded, and crack quantity and maximum width are all into one
Step reduces.
Embodiment three
Referring to Fig.1, a kind of UHPC-SS compound pipeline complex pipelines, composition include：Stainless-steel pipe 1, outside the stainless-steel pipe 1
Side has poured UHPC concrete layers 2, has bar-mat reinforcement 3 in the UHPC concrete layers 2, the UHPC concrete layers 2 with it is stainless
There is WELDING STUDS 4, the WELDING STUDS 4 to pass through bar-mat reinforcement 3 between steel steel pipe 1.
The stainless steel inner tube 1 uses 304 stainless steel tubes, wall thickness 1.5mm, internal diameter 300mm；The compound pipeline complex pipeline is using section
Section is prefabricated, and per segment length 5m, the compound pipeline complex pipeline both ends are equipped with ring flange 16 and stainless steel inner tube 1 for structural joint.Ginseng
According to Fig. 7, the ring flange 16 using UHPC concrete and compound pipeline complex pipeline it is common it is prefabricated form, and equipped with preformed hole 11.
With reference to Fig. 6, the present embodiment structural joint uses grouting formula pipe joint, first to two stainless steel inner tubes, 1 abutted surface
It carries out welding and forms stainless steel inner tube weld seam 6, then use reinforcing bar 14 by the ring flange 16 of 11 penetrator both sides of preformed hole
Template closes entire joint section, and UHPC mortars are perfused to joint section by grout hole, until slurries are fully filled with whole knot
The connection between compound pipeline complex pipeline is completed in the gap of structure joint section.
UHPC concrete layer constituent mass numbers are：Cement 30%, silica flour 15%, silica flour 3.5%, fine sand 44.3%,
Steel fibre 3%, water 3.4%, polycarboxylate water-reducer 0.8%.
Based on the production method of above-mentioned UHPC-SS compound pipeline complex pipelines, the UHPC-SS compound pipeline complex pipeline raw materials made by said ratio
It needs to carry out action of forced stirring, mixing time 13 minutes, 20 revs/min of mixing speed with forced mixer；It is cast in have and cut
1 outer surface of stainless steel inner tube of power nail 4 and bar-mat reinforcement 3, is subject to jolt ramming using shaking platform after the completion；It is flat using vibration after complete
Platform is subject to jolt ramming, reduces porosity to exclude bubble, and unusable vibrating spear vibrates, in order to avoid fiber direction is influenced,
Reduce tensile property；Then hot water maintenance is carried out to UHPC, is conserved 3 days using 80 DEG C of water termostats.
With reference to Fig. 8, according to the proportioning in this example, the lateral extreme load mean value for obtaining UHPC-SS compound pipeline complex pipelines exists
175kN or so.
Claims (6)
1. a kind of UHPC-SS compound pipeline complex pipelines, it is characterised in that：Including stainless-steel pipe (1), on the outside of the stainless-steel pipe (1)
UHPC concrete layers (2) have been poured, bar-mat reinforcement (3) is equipped in the UHPC concrete layers (2).
2. a kind of UHPC-SS compound pipeline complex pipelines according to claim 1, the UHPC concrete layers (2) and stainless-steel pipe
(1) WELDING STUDS (4) across bar-mat reinforcement (3) is equipped between.
3. a kind of UHPC-SS compound pipeline complex pipelines according to claim 1, it is characterised in that：Stainless-steel pipe (1) model
Using 304, internal diameter 300-1000mm, wall thickness 1.5-4mm.
4. a kind of UHPC-SS compound pipeline complex pipelines according to claim 1, it is characterised in that：The UHPC concrete layers (2)
Concrete wall thickness is 20-50mm.
5. a kind of UHPC-SS compound pipeline complex pipelines according to claim 1, it is characterised in that：The UHPC-SS compound pipeline complex pipelines it
Between connection there are three types of pipe joint mode, respectively cast-type pipe joint, assembled pipeline connector and grouting formula pipeline connect
Head.
6. based on the production method of above-mentioned UHPC-SS compound pipeline complex pipelines, include the following steps：
Step 1：It is by mass fraction by raw material components：Cement 25-30%, silica flour 5-15%, silica flour 3.5-13.5%, grain
The fine sand 30-50% of diameter 1.6-3.7mm, the steel fibre 3-9% of length 8mm, water 3.4-9.4%, polycarboxylate water-reducer 0.8-
The 1.5% UHPC-SS compound pipeline complex pipeline raw materials made carry out action of forced stirring with forced mixer, mixing time 10~15 minutes,
20 revs/min of mixing speed；
Step 2：It is cast in stainless steel inner tube (1) outer surface with WELDING STUDS (4) and bar-mat reinforcement (3), uses shake after the completion
Moving platform is subject to jolt ramming；
Step 3：Hot water maintenance is carried out to UHPC, is conserved 3 days using 80 DEG C of water termostats.
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| CN111824188A (en) * | 2019-04-19 | 2020-10-27 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Pipeline bearing structure of pipeline suspension transport means |
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