CN107989156A - Structure, pipeline and construction method for PCCP pipe bell and spigot seams - Google Patents
Structure, pipeline and construction method for PCCP pipe bell and spigot seams Download PDFInfo
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- CN107989156A CN107989156A CN201711212970.8A CN201711212970A CN107989156A CN 107989156 A CN107989156 A CN 107989156A CN 201711212970 A CN201711212970 A CN 201711212970A CN 107989156 A CN107989156 A CN 107989156A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 229920006334 epoxy coating Polymers 0.000 claims abstract description 108
- 239000003365 glass fiber Substances 0.000 claims abstract description 75
- 239000004593 Epoxy Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 45
- 229920003023 plastic Polymers 0.000 claims abstract description 35
- 239000004033 plastic Substances 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 35
- 229920002396 Polyurea Polymers 0.000 claims abstract description 20
- 239000004814 polyurethane Substances 0.000 claims abstract description 20
- 229920003226 polyurethane urea Polymers 0.000 claims abstract description 11
- 239000002390 adhesive tape Substances 0.000 claims abstract description 10
- 230000001680 brushing effect Effects 0.000 claims abstract description 10
- 125000006850 spacer group Chemical group 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 14
- 238000005470 impregnation Methods 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 2
- 241000209094 Oryza Species 0.000 claims 2
- 235000007164 Oryza sativa Nutrition 0.000 claims 2
- 235000009566 rice Nutrition 0.000 claims 2
- 239000003566 sealing material Substances 0.000 abstract description 5
- 239000003651 drinking water Substances 0.000 abstract description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229920001021 polysulfide Polymers 0.000 description 3
- 239000005077 polysulfide Substances 0.000 description 3
- 150000008117 polysulfides Polymers 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002180 anti-stress Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000009490 roller compaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004347 surface barrier Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- -1 wherein Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sealing Material Composition (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to hydraulic engineering field, and in particular to a kind of PCCP pipes bell and spigot seam construction and its construction method.It in implementation, will be cleaned out first in bell and spigot seam, SK primers brushed in seam, are then lining into seam with wide plastics seal material；Compacting, makes sealing material full of lower space in seam, and combines closely with slotted wall；Epoxy putty is filled thereon to flush, then in epoxy putty external coating elastic polyurethane/polyureas type coating or stickup adhesive tape, as separation layer, the brushing bottom high tenacity epoxy coating on separation layer, the width of epoxy coating relatively isolates slice width 10cm 20cm, then impregnated glass fibre band is laid with, brushes the epoxy coating of top layer high tenacity again thereon.The structure and its construction method have the characteristics that construction is simple, anti-backwater pressure are strong, scour ＆ wear resistance energy is good, meet sanitary standard for drinking water while PCCP pipe bell and spigot deformabilities are moderately kept.
Description
Technical field
The present invention relates to hydraulic engineering field, and in particular to it is a kind of for the structure of PCCP pipe bell and spigot seams, pipeline and
Construction method.
Background technology
Prestressed concrete cylinder pipe (Prestressed Concrete Cylinder Pipe, abbreviation PCCP pipe) is state
The novel pipeline material that interior nearly more than ten years grow up.The pipeline material is that one kind possesses high intensity, high permeability resistant and high sealing
Property compound tubing, can be applied to long interval water conveying tunnel, pressure inverted-siphon, power plant cycle Hydraulic Projects sewer pipe etc.,
It is widely adopted in China's water diversion project.
Two connecting pins of PCCP pipes are connected multiple PCCP pipes into a longer pipeline, socket joint using bell and spigot form
Oral area position seam can produce miniature deformation under foundation settlement or pressure changing, seam may be caused to leak, and long-term oozes
Leakage can influence pipeline foundation stability, bring hidden danger safe for operation.PCCP pipes may also be caused to corrode, influence safe operation and
Service life.
The processing of PCCP tubing bell and spigot seams is all a problem of industry all the time, and majority engineering uses water at present
Cement mortar is in the milk or polysulfide sealing compound processing, cement mortar easily produce contraction fissure after grouting processing a period of time, finally
Cause gap processing failure, bring security risk and seriously affect the service life of tubing.It is right when being handled using polysulfide sealing compound
The interface requirements of brushing are higher, it is necessary to and it is clean, otherwise just influence whether the combination of polysulfide sealing compound and interface rings.But
Due to the limitation of faucet structure and construction site condition, to accomplish that basal plane is clean difficult to realize, therefore be easy to cause poly-
Sulphur sealing compound is not close with being combined at interface rings, the separated phenomenon in gap occurs, very big hidden danger is brought to construction quality.
Since tubing production, construction level, environmental factor, geologic(al) factor etc. cause mouth of pipe seam in PCCP pipe water delivery engineerings
Situation about slightly leaking occurs often.Therefore, the design of heavy caliber PCCP pipe bell and spigots seam construction and method for repairing and mending are effectively blocked,
Maintenance to whole water delivery engineering is most important.
In long range PCCP pipe water delivery engineerings, since physical features residing for pipeline is different, cause the seam after bell and spigot installation
Width is different.Under the Condition of Environment Changes such as water flow pressure, temperature, geology sedimentation, the maximum opening of PCCP pipe bell and spigot seams
The design requirement of degree is different.Therefore seam sealing material should have certain ductility, and whole seam construction design can root
It is adjusted according to the design requirement of different joint gaps and opening width, to adapt to the dilatation of pipeline joint-seam.
The content of the invention
The main object of the present invention is to provide a kind of structure, pipeline and construction method for PCCP pipe bell and spigot seams.
The structure and construction method have construction is simple, anti-backwater pressure while PCCP pipe bell and spigot deformabilities are moderately kept
By force, the characteristics of scour ＆ wear resistance can be good.
In order to complete above-mentioned purpose, provided by the present invention for PCCP pipe bell and spigot seams structure successively include primer,
Plastics seal material, epoxy putty, separation layer, bottom high tenacity epoxy coating, impregnated glass fibre band and top layer high tenacity ring
Oxygen coating, wherein, primer is used to brush the inner wall in seam, plastics seal material, epoxy putty, separation layer, bottom high-ductility
Property epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating are arranged in order.
One preferable scheme is that primer is SK primers；The thickness of plastics seal material is 2 centimetres to 5 centimetres；Plasticity is close
Water retaining and sealing strip untill closure material；Separation layer is elastic coating or adhesive tape；
Elastic coating is elastic polyurethane or polyureas type coating；Bottom high tenacity epoxy coating, top layer high tenacity epoxy apply
Layer is than isolating 10 centimetres to 20 centimetres of slice width.
One preferable scheme is that the performance of waterstop sealing bar is：Elongation is more than 200%, and tensile strength is more than
0.1MPa；Impermeability pressure is more than 2.0MPa；The intensity of tensile strength >=5MPa of epoxy putty, epoxy putty and concrete bonding
≥4MPa；Elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；Glass
Glass fiber band is plain weave type glass fiber tape, and the performance of glass fiber tape is：Thickness is 0.2 millimeter to 0.4 millimeter, breaks elongation
Rate is more than 3%, and tensile strength is more than 300N/25mm；Epoxy coating is epoxy coating, and the performance of epoxy coating is：Tensile strength
More than 15MPa, elongation at break is more than 5%.
PCCP pipes provided by the invention connect the pipeline to be formed, including multiple end to end PCCP pipes, and two neighboring
The position of birdsmouth between PCCP pipes forms seam, and seam has interstitital texture, and it is close that interstitital texture includes primer, plasticity successively
Closure material, epoxy putty, separation layer, bottom high tenacity epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating.
Primer is brushed on the inner wall of seam, plastics seal material, epoxy putty, separation layer, bottom high tenacity epoxy coating, impregnation glass
Glass fiber band and top layer high tenacity epoxy coating are arranged in order；Also, primer, plastics seal material, epoxy putty are arranged on institute
The inner side of seam is stated, separation layer, bottom high tenacity epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating are set
In the outside of seam.
One preferable scheme is that primer is SK primers；The thickness of plastics seal material is 2 centimetres to 5 centimetres；Plasticity is close
Water retaining and sealing strip untill closure material；Separation layer is elastic coating or adhesive tape；Elastic coating applies for elastic polyurethane or polyureas
Layer；Bottom high tenacity epoxy coating, top layer high tenacity epoxy coating are 10 centimetres to 20 centimetres wider than separation layer.
One preferable scheme is that the performance of waterstop sealing bar is：Elongation is more than 200%, and tensile strength is more than
0.1MPa；Impermeability pressure is more than 2.0MPa；The intensity of tensile strength >=5MPa of epoxy putty, epoxy putty and concrete bonding
≥4MPa；Elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；Glass
Glass fiber band is plain weave type glass fiber tape, and the performance of glass fiber tape is：Thickness is 0.2 millimeter to 0.4 millimeter, breaks elongation
Rate is more than 3%, and tensile strength is more than 300N/25mm；Epoxy coating is epoxy coating, and the performance of epoxy coating is：Tensile strength
More than 15MPa, elongation at break is more than 5%.
One preferable scheme is, if design opening width β≤joint gap ω × 0.03, spacer width a=seams
Width ω+(2~4) cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glasses
Bandwidth b+ (2~4) cm；If designing opening width β ＞ joint gaps ω × 0.03, spacer width a=design opening widths β/
0.03+ (2~4) cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass fibre belts
Width b+ (2~4) cm.
Construction method provided by the invention to PCCP pipe bell and spigot seam constructions, it uses the following steps：
Step 1:Clean seam；
Step 2:In seam inseam brushing primer；
Step 3：Filling is with seam with wide plastics seal material；
Step 4：It is extremely concordant with bell and spigot outer rim that epoxy putty is filled on plastics seal material；
Step 5:In epoxy putty external coating separation layer；
Step 6:Roller coat epoxy impregnation glue, hangs certain time on glass fiber tape；
Step 7:In insulation surface brushing bottom high tenacity epoxy coating；
Step 8：The glass fiber tape for being loaded with epoxy impregnation glue is laid on bottom high tenacity epoxy coating, with rolling
Cylinder compacting, excludes the bubble between glass fiber tape and bottom high tenacity epoxy coating；
Step 9：Top layer high tenacity epoxy coating is brushed on glass fiber tape top layer.
One preferable scheme is that primer is SK primers；The thickness of plastics seal material is 2 centimetres to 5 centimetres, and plasticity is close
Water retaining and sealing strip untill closure material, the performance of waterstop sealing bar are：Elongation is more than 200%, and tensile strength is more than 0.1MPa；It is impervious
Pressure is more than 2.0MPa；Separation layer is elastic coating or adhesive tape, and elastic coating is elastic polyurethane or polyureas type coating, bullet
Property polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；Bottom high tenacity ring
Oxygen coating, top layer high tenacity epoxy coating are 10 centimetres to 20 centimetres wider than separation layer；The tensile strength of epoxy putty >=
Intensity >=4MPa of 5MPa, epoxy putty and concrete bonding, epoxy coating are epoxy coating, and the performance of epoxy coating is：Draw
Stretch intensity and be more than 15MPa, elongation at break is more than 5%；Glass fiber tape is plain weave type glass fiber tape, the property of glass fiber tape
Can be：Thickness is 0.2 millimeter to 0.4 millimeter, and elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm.
One preferable scheme is, if design opening width β≤joint gap ω × 0.03, spacer width a=seams
Width ω+(2~4) cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glasses
Bandwidth b+ (2~4) cm；If designing opening width β ＞ joint gaps ω × 0.03, spacer width a=design opening widths β/
0.03+ (2~4) cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass fibre belts
Width b+ (2~4) cm.
Beneficial effects of the present invention are as follows：
1. the structure proposed by the present invention for PCCP pipe bell and spigot seams has the ability for adapting to seam deformation, have at the same time
There is outstanding anti-backwater pressure capability, avoid the bulge easily occurred using spring protective coating material, come off problem, significantly
Improve the reliability of seam areas antiseepage.
2. the glass fiber tape composite epoxy coating material of joint surface coating of the present invention, with dry and moist concrete base
Material is respectively provided with excellent adhesive property, and adhesion strength is more than 3MPa, and impermeability pressure is more than 2.5MPa, anti-leak, anti-stress energy
Preferably.
3. the construction is simple of method provided by the invention, seam scour ＆ wear resistance can be good.
4. the present invention has drawn the compound impregnation glass fibers of joint surface epoxy coating by ring shake model-test data
Tie up functional relation of the band in different spacer width x and maximum deformation quantity y, it is proposed that different fracture widths and maximum opening width phase
The design method of the spacer width of adaptation.
It is nontoxic, volatility is small 5. material of the present invention is preferably non-solvent epoxy system, suitably in tunnel, pipeline
Used in the water delivery engineering more closed etc. construction environment；Meanwhile concrete surface barrier material of the present invention should
Meet state health standards《The safety evaluation standard of Drinking Water transmission ＆ distribution wetting system and protective materials》(GB/T 17219-
1998), therefore, water quality will not be impacted.
Brief description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the schematic diagram of the structure for PCCP pipe bell and spigot seams of the present invention.
Fig. 2 is that the girth joint model of the structure for PCCP pipe bell and spigot seams of the present invention repairs schematic diagram.
Fig. 3 is that the different spacer width girth joint models of the structure for PCCP pipe bell and spigot seams of the present invention are drawn
Stretch result of the test figure.
Fig. 4 is the letter of the spacer width x and maximum deformation quantity y of the structure for PCCP pipe bell and spigot seams of the present invention
Number graph of a relation.
The heavy caliber PCCP pipe bell and spigots seam that Fig. 5 is the present invention repairs structure width scale diagrams.
Numbering is in attached drawing：
2nd, plastics seal material；3rd, epoxy putty；4th, separation layer；5th, bottom high tenacity epoxy coating；6th, glass fiber tape；
7th, top layer high tenacity epoxy coating；A, spacer width；B, glass fibre bandwidth；C, high tenacity epoxy coating width.
Embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes.Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
Implemented using other different from other manner described here, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is from the limitation of following public specific embodiment.
As shown in Figure 1, the structure for PCCP pipe bell and spigot seams of the present embodiment include primer, plastics seal material 2,
Epoxy putty 3, separation layer 4, bottom high tenacity epoxy coating 5, impregnated glass fibre band 6 and top layer high tenacity epoxy coating 7.Bottom
Glue is used to brush the inner wall in seam.Plastics seal material 2, epoxy putty 3, separation layer 4, bottom high tenacity epoxy coating 5,
Impregnated glass fibre band 6 and top layer high tenacity epoxy coating 7 extend arrangement successively.
Wherein, it is preferred that primer is SK primers, and SK primers are produced by zhongshui Kehaili Engineering Technology Co., Ltd., Beijing
The primer of the model SK primers of offer.The thickness of plastics seal material is 2 centimetres to 5 centimetres, and plastics seal material is sealing
Sealing strip.Separation layer is elastic coating or adhesive tape, and elastic coating is elastic polyurethane or polyureas type coating.Bottom high tenacity
Epoxy coating, top layer high tenacity epoxy coating are than isolating 10 centimetres to 20 centimetres of slice width.The performance of waterstop sealing bar is：Elongation
Rate is more than 200%, and tensile strength is more than 0.1MPa；Impermeability pressure is more than 2.0MPa.Tensile strength >=5MPa of epoxy putty, ring
Intensity >=4MPa of oxygen putty and concrete bonding.Elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than
200%, tensile strength is more than 5MPa.Glass fiber tape is plain weave type glass fiber tape, and the performance of glass fiber tape is：Thickness is
0.2 millimeter to 0.4 millimeter, elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm.Epoxy coating is epoxy coating,
The performance of epoxy coating is：Tensile strength is more than 15MPa, and elongation at break is more than 5%.
Second embodiment
The PCCP pipes of the present embodiment, which connect the pipeline to be formed, includes multiple end to end PCCP pipes, and two neighboring PCCP
The position of birdsmouth between pipe forms seam, and seam has an interstitital texture, interstitital texture including primer, plastics seal material 2,
Epoxy putty 3, separation layer 4, bottom high tenacity epoxy coating 5, impregnated glass fibre band 6 and top layer high tenacity epoxy coating 7, its
In, primer is used to brush the inner wall in seam, plastics seal material 2, epoxy putty 3, separation layer 4, bottom high tenacity epoxy
Coating 5, impregnated glass fibre band 6 and top layer high tenacity epoxy coating 7 are arranged in order.
Wherein, the extending direction of interstitital texture is identical with the extending direction of PCCP pipes, also, primer, plastics seal material
2nd, epoxy putty 3 is arranged on the inner side of seam, separation layer 4, bottom high tenacity epoxy coating 5, impregnated glass fibre band 6 and top layer
High tenacity epoxy coating 7 is arranged on the outside of seam.
Primer is SK primers, and the thickness of plastics seal material is 2 centimetres to 5 centimetres, and plastics seal material is waterstop sealing
Bar.Separation layer is elastic coating or adhesive tape, and elastic coating is elastic polyurethane or polyureas type coating.Bottom high tenacity epoxy
Coating, top layer high tenacity epoxy coating are 10 centimetres to 20 centimetres wider than separation layer.The performance of waterstop sealing bar is：Elongation
More than 200%, tensile strength is more than 0.1MPa；Impermeability pressure is more than 2.0MPa.Tensile strength >=5MPa of epoxy putty, epoxy
Intensity >=4MPa of putty and concrete bonding.Elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than
200%, tensile strength is more than 5MPa.Glass fiber tape is plain weave type glass fiber tape, and the performance of glass fiber tape is：Thickness is
0.2 millimeter to 0.4 millimeter, elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm.Epoxy coating is epoxy coating,
The performance of epoxy coating is：Tensile strength is more than 15MPa, and elongation at break is more than 5%.
In addition, the present embodiment has investigated the compound impregnation glass of joint surface epoxy coating by girth joint model test
Maximum deformation quantity y of the fiber band under different spacer width x.Model test schematic diagram is as shown in Fig. 2, in fig. 2, a is represented
Spacer width, b represent impregnated glass fibre bandwidth, and c represents epoxy coating width.
Fig. 3 and table 1 are different spacer widths, in girth joint model, the epoxy coating of compound impregnated glass fibre band
Destruction force value and maximum deformation quantity test data.
The different spacer width girth joint model stretch test results of table 1
The functional relation that Fig. 4 fits spacer width x and maximum deformation quantity y is y=0.03x.
Thus, in the construction method of PCCP pipes bell and spigot seam construction, repaiied referring to Fig. 5 heavy caliber PCCP pipe bell and spigot seams
Structure width size is mended, wherein, ω represents joint gap, and a represents that spacer width, b represent that glass fibre bandwidth, c represent
High tenacity epoxy coating width.In the case of different joint gap ω and engineering design maximum seam opening width β, isolate slice width
Degree a, glass fibre bandwidth b, the exploitation mode of high tenacity epoxy coating width c calculate in two ways
Arrive：
If A. design opening width β≤joint gap ω × 0.03, spacer width a=joint gaps ω+(2~4) cm；
Glass fibre bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass fibre bandwidth b+
(2~4) cm；
If B. designing opening width β ＞ joint gaps ω × 0.03, spacer width a=design opening widths β/0.03+ (2
~4) cm；Glass fibre bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass fibres
Bandwidth b+ (2~4) cm is calculated.
It is wide according to PCCP aqueduct seams in the specific implementation step of the construction method of PCCP pipe bell and spigot seam constructions
The value of ω and the maximum opening width β of design are spent, according to exploitation method above, determines spacer width a, glass fibre bandwidth
The value of b and high tenacity epoxy coating width c.Then following construction method is carried out.
Construction method provided in this embodiment to PCCP pipe bell and spigot seam constructions, it uses the following steps：
Step 1:Clean seam；
Step 2:In seam inseam brushing primer；
Step 3：Filling is with seam with wide plastics seal material；
Step 4：It is extremely concordant with bell and spigot outer rim that epoxy putty is filled on plastics seal material；
Step 5:In epoxy putty external coating separation layer；
Step 6:Roller coat epoxy impregnation glue, hangs certain time on glass fiber tape；
Step 7:In insulation surface brushing bottom high tenacity epoxy coating；
Step 8：The glass fiber tape for being loaded with epoxy impregnation glue is laid on bottom high tenacity epoxy coating, with rolling
Cylinder compacting, excludes the bubble between glass fiber tape and bottom high tenacity epoxy coating；
Step 9：Top layer high tenacity epoxy coating is brushed on glass fiber tape top layer.
The present embodiment gives preferable construction method, its step is specifically：
Step 1: the polishing cleaning inside and outside seam.Craft or power wash inseam are carried out using wire brush, is cleaned out
Afterwards, blown off using air blower.Mortar surface is polished flat simultaneously clearly in seam both sides design high tenacity epoxy coating width range
Wash clean.
Step 2: inseam brushing SK primers, filling stops with seam with the GB water stop sealing materials that wide, thickness is (2-5) cm, GB
Watertight closure material is preferably the model GB waterstop sealing materials provided by zhongshui Kehaili Engineering Technology Co., Ltd., Beijing's production
The sealing material of material, its sealing effect are more preferable.Epoxy putty is filled thereon to flush.SK primers, GB waterstop sealings bar, ring
The performance of oxygen putty meets the requirement of table 2.
Table 2 stitches interior packing material performance requirement
Step 3: epoxy putty external coating elastic polyurethane/polyureas type coating or stickup adhesive tape, as isolation
Layer.The width of separation layer is a, preferably elastic coating, and the performance of elastic polyurethane/polyurea coating meets the requirement of table 3.
3 elastic polyurethanes of table/polyurea coating performance requirement
| Project | Performance requirement |
| Tensile strength (MPa) | ≥5 |
| Elongation (%) | ≥200 |
Step 4: selection thickness is 0.2mm, the glass fiber tape that width is b centimetres.Even roller applies on glass fibre band
Epoxy impregnation glue, impregnation resin content are (200~300) g/m2.Hang 1-2h (hour).The performance of glass fiber tape and dipping glue meets
The requirement of table 4.
4 glass fiber tape of table and dipping glue performance requirement
Step 5: the high tenacity epoxy coating that insulation surface brushing (1.0-1.5) mm is thick, width is c centimetres.Then will
The glass fiber tape of impregnation is laid on bottom high tenacity epoxy coating, with roller compaction, the bubble between excluding two layers.(1-
2) after h (hour), the high tenacity epoxy coating with lower floor with wide (1.0-1.5) mm thickness is brushed on glass fiber tape top layer.It is high
The performance of tough epoxy coating meets the requirement of table 5.
5 high tenacity epoxy coating performance requirement of table
Using the PCCP pipe bell and spigot seam constructions and its construction method of the present embodiment, construct in prestress steel pipe of concrete
In, can have that construction is simple, anti-backwater pressure be strong, resistant abrasion while PCCP pipe bell and spigot deformabilities are moderately kept
Performance is good, meets the features such as sanitary standard for drinking water.
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Claims (10)
- A kind of 1. structure for PCCP pipe bell and spigot seams, it is characterised in that：It is greasy including primer, plastics seal material, epoxy Son, separation layer, bottom high tenacity epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating；Wherein, the primer is used to brush the inner wall in seam, the plastics seal material, epoxy putty, separation layer, bottom High tenacity epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating are arranged in order.
- 2. it is used for the structure of PCCP pipe bell and spigot seams according to claim 1, it is characterised in that：The primer is SK primers；The thickness of the plastics seal material is 2 centimetres to 5 centimetres；Water retaining and sealing strip untill the plastics seal material；The separation layer is elastic coating or adhesive tape；The elastic coating is elastic polyurethane or polyureas type coating；The bottom high tenacity epoxy coating, top layer high tenacity epoxy coating are than 10 centimetres to 20 centimetres of the slice width of isolation.
- 3. the structure according to claim 2 for PCCP pipe bell and spigot seams, it is characterised in thatThe performance of the waterstop sealing bar is：Elongation is more than 200%, and tensile strength is more than 0.1MPa；Impermeability pressure is more than 2.0MPa；Tensile strength >=5MPa of the epoxy putty, intensity >=4MPa of the epoxy putty and concrete bonding；The elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；The glass fiber tape is plain weave type glass fiber tape, and the performance of the glass fiber tape is：Thickness for 0.2 millimeter extremely 0.4 millimeter, elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm；The epoxy coating is epoxy coating, and the performance of the epoxy coating is：Tensile strength is more than 15MPa, elongation at break More than 5%.
- 4. a kind of PCCP pipes connect the pipeline to be formed, it is characterised in thatManaged including multiple end to end PCCP, and the position of the birdsmouth between two neighboring PCCP pipes forms seam, it is described Seam has interstitital texture, and the interstitital texture includes primer, plastics seal material, epoxy putty, separation layer, bottom high tenacity Epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating, the primer are brushed on the inner wall of the seam；Wherein, the primer is brushed on the inner wall of seam, the plastics seal material, epoxy putty, separation layer, bottom high-ductility Property epoxy coating, impregnated glass fibre band and top layer high tenacity epoxy coating are arranged in order；Also, the primer, plastic sealed Material, epoxy putty are arranged on the inner side of the seam, the separation layer, bottom high tenacity epoxy coating, impregnated glass fibre Band and top layer high tenacity epoxy coating are arranged on the outside of the seam.
- 5. PCCP pipes connect the pipeline to be formed according to claim 4, it is characterised in that：The primer is SK primers；The thickness of the plastics seal material is 2 centimetres to 5 centimetres；Water retaining and sealing strip untill the plastics seal material；The separation layer is elastic coating or adhesive tape；The elastic coating is elastic polyurethane or polyureas type coating；The bottom high tenacity epoxy coating, top layer high tenacity epoxy coating are 10 centimetres to 20 lis wider than the separation layer Rice.
- 6. PCCP pipes according to claim 5 connect the pipeline to be formed, it is characterised in thatThe performance of the waterstop sealing bar is：Elongation is more than 200%, and tensile strength is more than 0.1MPa；Impermeability pressure is more than 2.0MPa；Tensile strength >=5MPa of the epoxy putty, intensity >=4MPa of the epoxy putty and concrete bonding；The elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；The glass fiber tape is plain weave type glass fiber tape, and the performance of the glass fiber tape is：Thickness for 0.2 millimeter extremely 0.4 millimeter, elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm；The epoxy coating is epoxy coating, and the performance of the epoxy coating is：Tensile strength is more than 15MPa, elongation at break More than 5%.
- 7. PCCP pipes according to claim 4 connect the pipeline to be formed, it is characterised in thatIf design opening width β≤joint gap ω × 0.03, the spacer width a=joint gaps ω+(2~4) cm；Glass Fibre ribbons width b=spacer widths a+ (10~20) cm；The high tenacity epoxy coating width c=glass bandwidth b+ (2~4) cm；If design opening width β ＞ joint gaps ω × 0.03, the spacer width a=design opening widths β/0.03+ (2~ 4)cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass bandwidth b+ (2 ~4) cm.
- 8. a kind of construction method to PCCP pipe bell and spigot seam constructions, it is characterised in that using the following steps：Step 1:Clean seam；Step 2:In the seam inseam brushing primer；Step 3：Filling is with the seam with wide plastics seal material；Step 4：It is extremely concordant with bell and spigot outer rim that epoxy putty is filled on the plastics seal material；Step 5:In the epoxy putty external coating separation layer；Step 6:Roller coat epoxy impregnation glue, hangs certain time on glass fiber tape；Step 7:In the insulation surface brushing bottom high tenacity epoxy coating；Step 8：The glass fiber tape for being loaded with epoxy impregnation glue is laid on bottom high tenacity epoxy coating, with roller pressure It is real, exclude the bubble between glass fiber tape and bottom high tenacity epoxy coating；Step 9：Top layer high tenacity epoxy coating is brushed on glass fiber tape top layer.
- 9. according to claim 8 to the construction method of PCCP pipe bell and spigot seam constructions, it is characterised in that：The primer is SK primers；The thickness of the plastics seal material is 2 centimetres to 5 centimetres, water retaining and sealing strip untill the plastics seal material, described to stop The performance of water retaining and sealing strip is：Elongation is more than 200%, and tensile strength is more than 0.1MPa；Impermeability pressure is more than 2.0MPa；The separation layer is elastic coating or adhesive tape, and the elastic coating is elastic polyurethane or polyureas type coating, described Elastic polyurethane, the performance of polyureas type coating are：Elongation at break is more than 200%, and tensile strength is more than 5MPa；The bottom high tenacity epoxy coating, top layer high tenacity epoxy coating are 10 centimetres to 20 lis wider than the separation layer Rice；Tensile strength >=5MPa of the epoxy putty, intensity >=4MPa of the epoxy putty and concrete bonding, the ring Oxygen coating is epoxy coating, and the performance of the epoxy coating is：Tensile strength is more than 15MPa, and elongation at break is more than 5%；The glass fiber tape is plain weave type glass fiber tape, and the performance of the glass fiber tape is：Thickness for 0.2 millimeter extremely 0.4 millimeter, elongation rate of tensile failure is more than 3%, and tensile strength is more than 300N/25mm.
- 10. according to claim 8 to the construction method of PCCP pipe bell and spigot seam constructions, it is characterised in that：If design opening width β≤joint gap ω × 0.03, the spacer width a=joint gaps ω+(2~4) cm；Glass Fibre ribbons width b=spacer widths a+ (10~20) cm；The high tenacity epoxy coating width c=glass bandwidth b+ (2~4) cm；If design opening width β ＞ joint gaps ω × 0.03, the spacer width a=design opening widths β/0.03+ (2~ 4)cm；Glass bandwidth b=spacer widths a+ (10~20) cm；High tenacity epoxy coating width c=glass bandwidth b+ (2 ~4) cm.
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