CN202830782U - Formwork for improving pier durability in freezing-thawing or chlorine salt erosion environment - Google Patents
Formwork for improving pier durability in freezing-thawing or chlorine salt erosion environment Download PDFInfo
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- CN202830782U CN202830782U CN 201220578347 CN201220578347U CN202830782U CN 202830782 U CN202830782 U CN 202830782U CN 201220578347 CN201220578347 CN 201220578347 CN 201220578347 U CN201220578347 U CN 201220578347U CN 202830782 U CN202830782 U CN 202830782U
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- formwork
- sheath
- durability
- pier stud
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Abstract
The utility model discloses a formwork for improving pier durability in a freezing-thawing or chlorine salt erosion environment. The formwork comprises a pier formwork and a protective sleeve with high freezing-thawing durability and/or chlorine salt erosion resistance, wherein the sleeve is fixed on the inner wall of the pier formwork using a detachable connection structure; when concrete pouring for the pier is finished and formwork stripping conditions are satisfied, the sleeve and pier concrete are combined together, the pier formwork is stripped to separate the pier formwork from the sleeve, and the sleeve is left on the pier surface. The formwork provided by the utility model uses the predesigned sleeve with excellent durability as a protective measure for the pier, can be used for obviously improving the pier durability, speeding up the cofferdam circulation rate in the construction process, greatly shortening the offshore operation time and greatly saving the maintenance costs in the running process, and is obvious in technical benefit and economic benefits.
Description
Technical field
The utility model relates to pier stud durability template under a kind of raising freeze thawing or the chloride erosion environment, is specially adapted to the pier stud of the concrete cast-in-situ construction under freeze thawing circulation or the chloride erosion condition.
Background technology
The post and beam structure is the principal mode of striding river, cross a river, over strait or offshore engineering; a large amount of case histories shows and is in that part that Tidal zone, wave spatter the district takes the lead in occuring because the corrosion of steel bar that the freeze thawing circulation destroys or chloride erosion causes, thereby shortened the normal Years Of Service of works.When structure durability is designed, Tidal zone and wave are spattered the district also taked respectively some safeguard measures, as adopting high performance concrete, permeable template lining, paint coating, impregnating with silane etc.
If employing cast-in-place construction; the high performance concrete that then designs; in entity structure, often be difficult to realize; its performance is subjected to the impact of extraneous many conditions and has a greatly reduced quality; especially the concrete quality in the reinforcement cover scope often is difficult to guarantee that this part plays vital effect to structure durability exactly.Adopt the permeable template lining can significantly improve the concrete freeze thawing resistance circulation ability in top layer and corrosion resistance of chloride ion ability, but the degree of depth of its improvement is limited, often also only has several millimeters.The quality of paint coating and impregnating with silane is the impact of protected layer scope inner concrete quality not only, also is subjected to the impact of field operation condition, and its performance does not often reach design object yet.Especially at sea, marine growth such as barnacle, oyster etc. are unusually serious to the destruction of coating globality, can cause the large tracts of land of organic coating to be peeled off within the short several years, make its forfeiture to the concrete defencive function of pier stud.Impregnating with silane has higher requirement to the concrete water content, and only when concrete reached quite high degree of drying, dipping just had good effect, and this need to wait until the long age of concrete, and this is again the requirements that does not satisfy at a lot of scenes.
If pier stud adopts precast segment, integral hoisting technique, then need large-scale precasting yard, lifting, haulage device, the good condition of navigating and suitable operation at sea weather conditions, factors is restricting applying of Precast Pier Columns technique.
The utility model content
Task of the present utility model is to solve the technological deficiency that the pier stud form of construction work exists in the prior art, and pier stud durability template under a kind of raising freeze thawing or the chloride erosion environment is provided.
Its technical solution is:
Pier stud durability template under a kind of raising freeze thawing or the chloride erosion environment, comprise Pier Formwork and the sheath with high freeze-thaw durability and/or precenting chlorate corrosion, sheath is fixed on the inwall of Pier Formwork, and takes the detachable syndeton between the Pier Formwork; Finish when satisfying the form removal condition in pier stud concreting, sheath and pier stud concrete combine, and remove Pier Formwork and make Pier Formwork and sheath exit, and sheath is retained on the pier stud surface.
Above-mentioned sheath inboard is pasted with the energy-absorbing material layer.
A kind of method that improve freeze thawing or chloride erosion environment under pier stud durability relevant especially with the utility model may further comprise the steps:
Step 1, preparation Pier Formwork and sheath, sheath adopts stainless steel, glass fiber reinforced plastic or prefabricated the forming of superhigh tenacity cement base-material;
Step 2 is carried out assembly unit with Pier Formwork, after assembly unit is finished sheath is fixed on the template inwall, takes the detachable connected mode between sheath and the Pier Formwork;
Step 4 is built the pier stud concrete, and when the pier stud concrete satisfied the form removal condition, sheath and pier stud concrete combined, and removes Pier Formwork and makes Pier Formwork and sheath exit, and sheath is retained on the pier stud surface.
In the above-mentioned steps one, at the inboard energy-absorbing material layer of pasting of sheath.
Above-mentioned energy-absorbing material layer adopts plastic foam to make.
The utlity model has following useful technique effect:
The utility model with the prefabricated sheath with superior durability as the pier stud safeguard procedures, can significantly improve the durability of pier stud, can accelerate the cofferdam turn-around speed in the construction period, significantly shorten Potential Working Time For Operation At Sea, can save a large amount of maintenance costs in the operation phase, technology and remarkable in economical benefits.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing and the specific embodiment:
Fig. 1 is the structural principle schematic diagram of a kind of embodiment of the utility model, shows the Pier Formwork in the utility model.
Fig. 2 is partial cross section's structural principle schematic diagram of a kind of embodiment of the utility model, shows the coxopodite Pier Formwork part in the construction.
Fig. 3 is partial cross section's structural principle schematic diagram of a kind of embodiment of the utility model, shows the upper joint Pier Formwork part in the construction.
1. coxopodite Pier Formworks among the figure, 2. template connecting lateral plate, 3. connecting bolt hole, 4. sheath, 5. template connects top board, 6. pier stud reinforcing bar, 7. the pier stud concrete is 8. gone up a joint Pier Formwork.
The specific embodiment
In conjunction with Fig. 1, Fig. 2 and Fig. 3, pier stud durability template under a kind of raising freeze thawing or the chloride erosion environment comprises Pier Formwork 1,8 and have a sheath 4 of high freeze-thaw durability and/or precenting chlorate corrosion; Preferably, the inboard Pasting of above-mentioned sheath has the energy-absorbing material layer, and above-mentioned energy-absorbing material layer can be the plastic foam layer.Above-mentioned sheath is fixed on the inwall of Pier Formwork, and takes the detachable syndeton between the Pier Formwork.Finish when satisfying the form removal condition in pier stud concreting, sheath combines with the pier stud concrete seven, removes Pier Formwork and makes Pier Formwork and sheath exit, and sheath is retained on the pier stud surface.
A kind of method that improve freeze thawing or chloride erosion environment under pier stud durability relevant especially with the utility model may further comprise the steps:
Step 1, preparation Pier Formwork and sheath, Pier Formwork adopt existing techniques in realizing to get final product, and sheath can adopt prefabricated the forming such as stainless steel, glass fiber reinforced plastic or superhigh tenacity cement base-material; In this step, preferably at the inboard energy-absorbing material layer of pasting of sheath; The energy-absorbing material layer can adopt plastic foam to make.
Step 2 is carried out assembly unit with Pier Formwork, after assembly unit is finished sheath is fixed on the template inwall, takes the detachable connected mode between sheath and the Pier Formwork.
Step 4 is built the pier stud concrete, and when the pier stud concrete satisfied the form removal condition, sheath combined with the pier stud concrete, removes Pier Formwork and makes Pier Formwork and sheath exit, and sheath is retained on the pier stud surface.
In the method for pier stud durability, more specifically implementation has under above-mentioned raising freeze thawing or the chloride erosion environment:
By the connecting bolt hole 3 that is distributed on the Pier Formwork connecting lateral plate 2 coxopodite Pier Formwork 1 is stitched together, clear up its inner surface, then sheath 4 is fixed in coxopodite Pier Formwork 1 inboard, can be by prepared screw-bolt hole on the steel form of the outside, sheath is withstood in precession by bolt, thereby realizes that it fixes.
On-the-spot colligation pier stud reinforcing bar 6, colligation height will be fixed with coxopodite Pier Formwork 1 hoisted in position of sheath 4, with the slit of mortar sealing coxopodite Pier Formwork 1 with the cushion cap top during slightly higher than the height of sheath 4.
After coxopodite Pier Formwork 1 is in place, continue colligation pier stud reinforcing bar 6, by being distributed in the connecting bolt hole 3 that template connects on the top board 5 coxopodite Pier Formwork 1 and a upper joint Pier Formwork 8 are stitched together.
Until the on-the-spot splicing of a upper joint Pier Formwork 8 and adjust complete after, build the pier stud concrete seven, when the pier stud concrete seven satisfies the form removal condition, remove successively upper joint Pier Formwork 8 and a coxopodite Pier Formwork 1, the concrete of coxopodite Pier Formwork more than 1 carried out moisture-keeping maintaining, if the subzero temperature situation occurs, all pier stud concrete sevens all must carry out insulated curing.The construction of next pier stud was carried out in the cofferdam of dismountable substructure after Pier Formwork was removed.
In the utility model, the setting of sheath is not to change pier stud cross dimensions and thickness of protection tier as principle, and after Pier Formwork was removed, sheath was retained in the pier stud surface, as the ancillary method of pier stud durability.Determine the size of sheath according to pier stud cross dimension and the region height that needs protection; sheath is prefabricated forming; transport on-the-spot front sheath to and possessed good freeze-thaw durability and precenting chlorate corrosion performance, in order to guarantee its integrality, had better not take Site Welding.Sheath can be with prefabricated forming such as stainless steel, glass fiber reinforced plastic, superhigh tenacity cement-based materials, behind the template assembly sheath is fixed on the template inwall, should guarantee sheath and the good combination of template and the integrality of sheath in the formwork hoisting process, guarantee again that when form removable sheath can be complete is retained in the pier stud surface.When adopting glass fiber reinforced plastic or the prefabricated sheath of superhigh tenacity cement-based material, be preferably in and paste one deck energy-absorbing material such as plastic foam etc. in the sheath, be used for absorbing the pier stud circumferential deformation that causes because of the cementitious material hydration heat, energy-absorbing material thickness determines jointly that according to cross section and the cementitious material thermal insulation warming of pier stud the up and down edge of energy-absorbing material is respectively apart from sheath tip and each 10～15cm of bottom; If the employing stainless steel material then need to not pasted energy-absorbing material at inwall.
The utility model integrates pier stud concrete cast-in-situ and integral prefabricated lifting advantage, can save the operations such as the release agent brushing of cast in place process and polishing, save the durability ancillary methods such as permeable template lining and paint coating, and adopt the precasting yard batch production, its quality is fully controlled.Be the measure of dismountable cofferdam after the pier stud form removal, accelerate cofferdam week transfer efficient, shorten Potential Working Time For Operation At Sea.Because sheath material has superior durability, can reduce maintenance times and the maintenance cost of operation phase.The utility model requires to lift after the assembly unit of pier stud coxopodite template elder generation, and the template deadweight that sheath increases is limited, and hoisting machine tool can meet the demands fully.
The relevant technologies content of not addressing in the aforesaid way is taked or is used for reference prior art and can realize.
Need to prove that those skilled in the art can also make such or such easy variation pattern under the instruction of this manual, such as equivalent way, or obvious mode of texturing.Above-mentioned variation pattern all should be within protection domain of the present utility model.
Claims (2)
1. one kind is improved pier stud durability template under freeze thawing or the chloride erosion environment, the sheath that it is characterized in that comprising Pier Formwork and have high freeze-thaw durability and/or precenting chlorate corrosion, sheath is fixed on the inwall of Pier Formwork, and takes the detachable syndeton between the Pier Formwork; Finish when satisfying the form removal condition in pier stud concreting, sheath and pier stud concrete combine, and remove Pier Formwork and make Pier Formwork and sheath exit, and sheath is retained on the pier stud surface.
2. pier stud durability template under a kind of raising freeze thawing according to claim 1 or the chloride erosion environment, it is characterized in that: above-mentioned sheath inboard is pasted with the energy-absorbing material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578347 CN202830782U (en) | 2012-11-05 | 2012-11-05 | Formwork for improving pier durability in freezing-thawing or chlorine salt erosion environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578347 CN202830782U (en) | 2012-11-05 | 2012-11-05 | Formwork for improving pier durability in freezing-thawing or chlorine salt erosion environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202830782U true CN202830782U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220578347 Expired - Fee Related CN202830782U (en) | 2012-11-05 | 2012-11-05 | Formwork for improving pier durability in freezing-thawing or chlorine salt erosion environment |
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| CN (1) | CN202830782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912731A (en) * | 2012-11-05 | 2013-02-06 | 山东高速青岛公路有限公司 | Template and method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment |
-
2012
- 2012-11-05 CN CN 201220578347 patent/CN202830782U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912731A (en) * | 2012-11-05 | 2013-02-06 | 山东高速青岛公路有限公司 | Template and method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20141105 |
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| EXPY | Termination of patent right or utility model |