CN101725183A - Anti-corrosion pipe for concrete pier column under severe environment - Google Patents
Anti-corrosion pipe for concrete pier column under severe environment Download PDFInfo
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- CN101725183A CN101725183A CN200810202131A CN200810202131A CN101725183A CN 101725183 A CN101725183 A CN 101725183A CN 200810202131 A CN200810202131 A CN 200810202131A CN 200810202131 A CN200810202131 A CN 200810202131A CN 101725183 A CN101725183 A CN 101725183A
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Abstract
The invention relates to a novel anti-corrosion structural material, namely an anti-corrosion pipe for solving the durability of a concrete pier column under a severe environment. The anti-corrosion pipe consists of a large-caliber plastic pipe and double sticky tapes at the two ends of a pipe inner wall. The diameter and the thickness of the plastic pipe can be customized. During use, the anti-corrosion pipe is pre-placed in a steel mold, and then the concrete is poured to carry out integral molding. Freshly mixed concrete can be bonded with pre-bonded layers of the double sticky tapes on the inner wall of the anti-corrosion pipe so as to prevent harmful substances from permeating from an interface. The anti-corrosion pipe coats the concrete so as to protect the concrete and prevent the corrosion of steel bars in the concrete, thereby greatly enhancing the durability of the concrete pier column and overcoming the defect of poor ductility of the concrete column at the same time. The anti-corrosion pipe is applicable for newly-built bridge pier structures or other concrete column structures in tide sputtering regions under a marine environment and soil-air transition regions of saline lake areas.
Description
Technical field
The present invention relates to building material technical field, particularly relate to a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances.
Background technology
A large amount of on-the-spot exposure test and the actual engineering findings of concrete structure such as China's briny environment, salt-soda soil and salt lick show, use harbour and the bridge in about 10 years that serious or more serious destruction is all taken place more than 80%, as corrosion of steel bar destruction, freeze injury and chemical erosion etc.These on-the-spot destructions have a common ground, being in morning and evening tides/wave exactly spatters the corrosion of the district or the concrete pier stud of soil-air zone and corrosion of steel bar and destroys than being under water and distinguish, soil district or atmospheric region much serious, see that (atmospheric region and soil district are subjected to villaumite or sulfate attack in the rainwater for Fig. 1 (atmospheric region and district's corrosion under water are slight) and Fig. 2, corrode slighter), its main cause is morning and evening tides/wave concrete of spattering the district because of in drying and watering cycle, the freeze thawing circulation, temperature cycles, under the effect of ripple sand abrasion, perhaps soil-air zone is subjected under the effect of salt crystallisation cycle, easier entering in the concrete such as erosion ion in the environment and oxygen, hydrated product in the concrete is also easier to be exchanged or stripping with environment ion, therefore serious corrosion of steel bar and concrete erosion destruction just take place in length of life in the concrete pier stud at this position, and the serious harm safety of whole building is used.
Mainly be on the basis of original antiseptic concrete erosion design for these transition regions both at home and abroad at present, adopt topping (coating, take-up strap, protective jacket etc.) on the pier stud surface, these methods all have different shortcomings.Practice situation just at present, dope layer is very short application life, will come off less than 5 years, and brushing cost height again, difficulty is big.Take-up strap is mainly cloth, and shortcoming is that elasticity is less, comes off easily; Result of use is preferably the anticorrosion cover of one chip of U.S. CCI company at present, but still has potential penetrating passage, and thickness can not be too thick, otherwise is unfavorable for the artificial construction.The operating expenses of take-up strap and the anticorrosion cover of one chip is higher in addition, all needs the diver to carry out the operation of underwater portion, time-consumingly takes the labour.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances in order to overcome the defective that above-mentioned prior art exists, and the morning and evening tides wave that can be applicable to be in marine environment spatters newly-built bridge pier structure or other concrete column structures in the soil-air transition district of district and Yanhu District.
Purpose of the present invention can be achieved through the following technical solutions: a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances is characterized in that comprise that heavy caliber moulds pipe, this heavy caliber is moulded on the inwall at two ends up and down of pipe and respectively is provided with a circle waterproof two-sided tape.
The one side of described waterproof two-sided tape is that the heavy caliber that is used to bond is moulded the common viscous layer of inside pipe wall, and another side is pre-tack coat, is used for boning in hardening process with back cast green concrete.
Described heavy caliber is moulded pipe and is adopted high-density polytene winding pipe, high density polyethylene (HDPE) bellows, polyvinyl chloride wind pipe, polyvinyl chloride finned tube or polyvinyl chloride bellows.
The thickness that described heavy caliber is moulded pipe is 6mm～200mm.
Described anti-corrosion pipe is preset in the punching block in use, and fluid concrete integrated molding then, the concrete of cast bond with the pre-tack coat of anti-corrosion pipe waterproof two-sided tape in hardening process.
Compared with prior art, the present invention has following advantage:
Directly be preset in the punching block when (1) anti-corrosion pipe is installed, after the concrete pouring with anti-corrosion pipe in the pre-tack coat of two-sided tape at two ends bond, structure-integrated moulding and anticorrosive measure carry out synchronously, save the operating expenses and the time of later stage structural anticorrosion erosion measure, need not the diver and construct.
(2) anti-corrosion pipe is prefabricated seamless pipe, thickness at 6mm between the 200mm, wrapping layer thicker more even (maximum ga(u)ge of the anticorrosion cover of one chip only is 6.25mm) with respect to other modes, except etch-proof function, can also form the effect of lock ring constraint to core concrete, improve the big problem of core concrete fragility, improve the ductility and the toughness of combining structure; Destroy fracture and axial strain at core concrete and reach under 10% the situation, the residual strength rate can also maintain more than 40%, improves safety of structure; And anticorrosion cover of one chip or take-up strap be by manually wrapping up, and thickness is unfavorable for construction too greatly, and concrete is not had the constraint humidification.
(3) material of anti-corrosion pipe such as high density polyethylene (HDPE) (HDPE) have very excellent anti-physics and chemical attack characteristic, be widely used in land or marine pipeline anticorrosion coating at present, the Fence structure of sea farming industry and the sewage drainage road of municipal engineering can adapt to extensive chemical corrosive environment, underwater environment, soil environment and outdoor exposure environment; Anti-corrosion pipe is as one deck " thick diaphragm "; form an integral body by two-sided tape and concrete; prevent that hazardous substancess such as villaumite, sulfate and oxygen are from interface intrusion concrete; and replace concrete to bear the temperature cycles of adverse circumstances and physical property corrosion that drying and watering cycle is brought, to improve durability of structures.
(4) pyroconductivity of the material of anti-corrosion pipe such as polyvinyl chloride (PVC) and high density polyethylene (HDPE) (HDPE) has only 0.33kcal/m.hr. ℃, 0.29kcal/m.hr. ℃ respectively, all less than 1% of steel pipe, after punching block is sloughed in moulding, anti-corrosion pipe still can be used as a concrete sealing insulation layer, for concrete has been created sufficient curing condition, other safeguard procedures all are that the concrete structure moulding is carried out afterwards, do not have this effect.
(5) fracture elongation of the material of anti-corrosion pipe such as polyvinyl chloride (PVC) and high density polyethylene (HDPE) (HDPE) is respectively 100% and 700%, brittle temperature all is lower than-50 ℃, have good ductility and cryogenic property, present two kinds of tubing bury service life behind the ground all greater than 50 years, because the support of core concrete, stress rupture can not take place in anti-corrosion pipe, and these physical properties can guarantee that anti-corrosion pipe plays omnidistance effect of protecting to concrete structure, with the same life-span of building.
Description of drawings
Fig. 1 is the concrete pier stud schematic diagram of ocean province;
Fig. 2 is the concrete pier stud schematic diagram of Yanhu District;
Fig. 3 is applied to the structural representation of concrete pier stud for the present invention;
Fig. 4 is the sectional view of Fig. 3;
Fig. 5 is a three-dimensional cutaway view of the present invention;
Fig. 6 is the use schematic diagram of anti-corrosion pipe of the present invention in the ocean province;
Fig. 7 is the use schematic diagram of anti-corrosion pipe of the present invention at Yanhu District;
Fig. 8 is the comparison diagram of the stress-strain diagram of the anti-corrosion pipe confined concrete of embodiments of the invention 1 and same size plain concrete;
Fig. 9 is the comparison diagram of the stress-strain diagram of the anti-corrosion pipe confined concrete of embodiments of the invention 2 and same size plain concrete;
Wherein, the black line among Fig. 8, Fig. 9 is represented anti-corrosion pipe of the present invention, and gray line is represented plain concrete.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing
As Fig. 3～shown in Figure 9, a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances, anti-corrosion pipe 1 of the present invention comprise that heavy caliber moulds pipe 2, and this heavy caliber is moulded on the inwall at two ends up and down of pipe 2 and respectively is provided with a circle waterproof two-sided tape 3.
The one side of described waterproof two-sided tape 3 is that the heavy caliber that is used to bond is moulded the common viscous layer of inside pipe wall, and another side is pre-tack coat, is used for boning in hardening process with back cast green concrete 4; Described heavy caliber is moulded pipe 2 and is adopted high-density polytene winding pipe, high density polyethylene (HDPE) bellows, polyvinyl chloride wind pipe, polyvinyl chloride finned tube or polyvinyl chloride bellows; The thickness that described heavy caliber is moulded pipe 2 is 6mm～200mm; Described anti-corrosion pipe 1 is preset in the punching block 5 in use, and fluid concrete 4 integrated moldings then, the concrete 4 of cast bond with the pre-tack coat of anti-corrosion pipe 1 waterproof two-sided tape 2 in hardening process.
Anti-corrosion pipe is used to wrap up the concrete pier stud, adopts the two-sided tape of waterproof to seal between inside pipe wall and the concrete.The thickness of anti-corrosion pipe, external diameter can carry out prefabricated according to engineering size and cost control.
Anti-corrosion pipe of the present invention 1 is that it is preset within the punching block 5 when using, fluid concrete integrated molding then, and integral body of anti-corrosion pipe and concrete structure formation after the demoulding is shown in Fig. 6,7.
The two-sided tape purpose at the inboard two ends of anti-corrosion pipe of the present invention is in order to cut off infiltration lane, to prevent that extraneous hazardous substances is penetrated in the middle of anti-corrosion pipe and the concrete gap.This two-sided tape is a kind of waterproof product, one side is common viscous layer, be bonded in anti-corrosion pipe inwall (be bonded in advance and mould the inside pipe wall upper and lower end parts), can require to determine tape width according to classification of waterproof, another side is pre-tack coat, itself does not have viscosity, but the hydrated product in the concrete pouring after-hardening process can the microstructure surperficial with it carry out mechanical snap, thereby realizes the pre-bonding of adhesive tape to the back pouring concrete.This two-sided tape is bonded in the anti-corrosion pipe upper and lower end parts in advance, can require to determine tape width according to classification of waterproof.
Embodiment 1:
The anti-corrosion pipe material of present embodiment is high density polyethylene (HDPE) (HDPE) pipe, and nominal pressure 1.6MPa, core concrete strength grade are C30.The HDPE pipe has strong corrosion resistant and good ductility and cryogenic property, and the physics that can replace the concrete pier stud to bear under the adverse circumstances corrodes and chemical attack.Be used to connect HDPE pipe and concrete two-sided tape and blocked the passage that hazardous substancess such as oxygen, chlorion are invaded, prevented the generation of corrosion of steel bar.The pyroconductivity of HDPE pipe only is 0.6% of a steel pipe, for core concrete provides the maintenance environment of constant temperature, avoids concrete in mass owing to the interior outside temperature difference causes cracking.
Fig. 8 is the comparison diagram of the stress-strain diagram of anti-corrosion pipe of the present invention (adopting 1.6MPa HDPE pipe) confined concrete and same size plain concrete.With respect to plain concrete, the compressive strength of this combining structure has improved 48.8%, and strain energy has improved 2500%, and the hoop restraint stress of HDPE pipe has improved the ductility and the anti-seismic performance of concrete pier stud.
Embodiment 2:
The anti-corrosion pipe material of present embodiment is polyvinyl chloride (PVC) pipe, and nominal pressure 1.6MPa, core concrete strength grade are C30.Pvc pipe has strong corrosion resistant and good ductility and cryogenic property equally, can replace the concrete pier stud to bear corrosion under the adverse circumstances.Be used to connect pvc pipe and concrete two-sided tape and blocked the passage that hazardous substancess such as oxygen, chlorion are invaded, prevented the generation of corrosion of steel bar.The pyroconductivity of pvc pipe only is 1% of a steel pipe, for core concrete provides the maintenance environment of constant temperature, avoids concrete in mass owing to the interior outside temperature difference causes cracking.
The comparison diagram of the stress-strain diagram of Fig. 9 anti-corrosion pipe of the present invention (adopting the 1.6MPa pvc pipe) confined concrete and same size plain concrete.With respect to plain concrete, the compressive strength of this combining structure has improved 157%, and strain energy has improved 3780%.The hoop restraint stress of pvc pipe has improved the ductility and the anti-seismic performance of concrete pier stud, and has greatly improved structure bearing capacity.
Claims (5)
1. an anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances is characterized in that, comprises that heavy caliber moulds pipe, and this heavy caliber is moulded on the inwall at two ends up and down of pipe and respectively is provided with a circle waterproof two-sided tape.
2. a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances according to claim 1, it is characterized in that, the one side of described waterproof two-sided tape is that the heavy caliber that is used to bond is moulded the common viscous layer of inside pipe wall, another side is pre-tack coat, is used for boning in hardening process with back cast green concrete.
3. a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances according to claim 1 and 2, it is characterized in that described heavy caliber is moulded pipe and adopted high-density polytene winding pipe, high density polyethylene (HDPE) bellows, polyvinyl chloride wind pipe, polyvinyl chloride finned tube or polyvinyl chloride bellows.
4. a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances according to claim 3 is characterized in that the thickness that described heavy caliber is moulded pipe is 6mm～200mm.
5. a kind of anti-corrosion pipe that is used for the concrete pier stud under the adverse circumstances according to claim 1, it is characterized in that, described anti-corrosion pipe is preset in the punching block in use, fluid concrete integrated molding then, the concrete of cast bond with the pre-tack coat of anti-corrosion pipe waterproof two-sided tape in hardening process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202131A CN101725183A (en) | 2008-11-03 | 2008-11-03 | Anti-corrosion pipe for concrete pier column under severe environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202131A CN101725183A (en) | 2008-11-03 | 2008-11-03 | Anti-corrosion pipe for concrete pier column under severe environment |
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| CN101725183A true CN101725183A (en) | 2010-06-09 |
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| CN200810202131A Pending CN101725183A (en) | 2008-11-03 | 2008-11-03 | Anti-corrosion pipe for concrete pier column under severe environment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182277A (en) * | 2011-03-29 | 2011-09-14 | 河北联合大学 | Fiber reinforced precast concrete tubular column and construction method thereof |
| CN102392411A (en) * | 2011-10-20 | 2012-03-28 | 上海交通大学 | Reinforcement erosion prevention method and device for piers made of concrete for marine engineering |
| CN103194961A (en) * | 2013-03-27 | 2013-07-10 | 天津市市政工程设计研究院 | Bridge pier column under high-concentration salt solution corrosion environment |
| CN105002934A (en) * | 2015-07-08 | 2015-10-28 | 周剑辉 | Anti-corrosion protection system with function of initiative permeation for reinforced concrete base |
| CN106760212A (en) * | 2017-01-17 | 2017-05-31 | 南京林业大学 | A kind of ripple multiple tube seawater marine sand concrete structure |
| CN111119054A (en) * | 2018-10-31 | 2020-05-08 | 慧邦开源（北京）科技有限公司 | Using method of pouring template applied to construction process of submarine pier |
-
2008
- 2008-11-03 CN CN200810202131A patent/CN101725183A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182277A (en) * | 2011-03-29 | 2011-09-14 | 河北联合大学 | Fiber reinforced precast concrete tubular column and construction method thereof |
| CN102392411A (en) * | 2011-10-20 | 2012-03-28 | 上海交通大学 | Reinforcement erosion prevention method and device for piers made of concrete for marine engineering |
| CN102392411B (en) * | 2011-10-20 | 2013-09-25 | 上海交通大学 | Reinforcement erosion prevention method and device for piers made of concrete for marine engineering |
| CN103194961A (en) * | 2013-03-27 | 2013-07-10 | 天津市市政工程设计研究院 | Bridge pier column under high-concentration salt solution corrosion environment |
| CN105002934A (en) * | 2015-07-08 | 2015-10-28 | 周剑辉 | Anti-corrosion protection system with function of initiative permeation for reinforced concrete base |
| CN105002934B (en) * | 2015-07-08 | 2018-01-09 | 周剑辉 | A kind of reinforced concrete foundation anti-corrosion protection system of active infiltration |
| CN106760212A (en) * | 2017-01-17 | 2017-05-31 | 南京林业大学 | A kind of ripple multiple tube seawater marine sand concrete structure |
| CN111119054A (en) * | 2018-10-31 | 2020-05-08 | 慧邦开源（北京）科技有限公司 | Using method of pouring template applied to construction process of submarine pier |
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Open date: 20100609 |