CN102912748B - Removal-free template on inner side of concrete base of anti-collision guardrail and application method thereof - Google Patents
Removal-free template on inner side of concrete base of anti-collision guardrail and application method thereof Download PDFInfo
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- CN102912748B CN102912748B CN201210434414.6A CN201210434414A CN102912748B CN 102912748 B CN102912748 B CN 102912748B CN 201210434414 A CN201210434414 A CN 201210434414A CN 102912748 B CN102912748 B CN 102912748B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002775 capsule Substances 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000002023 wood Substances 0.000 claims description 26
- 230000004888 barrier function Effects 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Abstract
The invention discloses a removal-free template on the inner side of a concrete base of an anti-collision guardrail, and an application method thereof. The application method includes an earlier preparation step and a placing step, wherein the preparation step includes the following operation: taking a precasting thin plate as an inner side template of the concrete base of the guardrail, adopting a square timber and an anchor bolt to limit one side of the precasting thin plate, adopting cushion blocks bound on a rebar of the guardrail base to limit the other side of the precasting thin plate, placing an inflation capsule in a gap of the square timber, adopting the inflation capsule to seal the clearance between a beam top and the precasting thin plate to avoid slurry leakage, and adopting a back pressure screw cap at the top of the anchor bolt and a cord chain encircling the guardrail base to limit the square timber; then the placing step of placing concrete at the guardrail base is performed on the spot; and after the placing is completed, the precasting thin plate is combined with the concrete of the guardrail base. According to the invention, the capability of resisting corrosion of deicing salt is guaranteed, the construction speed of the guardrail base is quickened, and the precasting thin plate is easy to replace during the operation.
Description
Technical field
The present invention relates to a kind of free removal template for anticollision barrier concrete bed inner side, and the application process of this free removal template.
Background technology
In order to improve the crashproof ability of anticollision barrier, concrete bed is set in steel guard rail bottom conventionally, the height of base is not from 20 ~ 60cm etc.The erosion of the snow-broth that inside guardrail base, concrete is often subject to the rainwater that splashes of driving and contains deicer salts, under deicer salts corrosion function, through one or several winter, guardrail base concrete just there will be the top layer slurry even phenomenon of loose concrete that comes off.These breakoff phenomenons all reflect that guardrail base is concrete second-rate, and the ability that especially anti-deicer salts is destroyed is lower.Guardrail base cast-in-situ concrete is as the round-off work of bridge engineering, because its design service life is short and structure section is little, concrete preparation, build, maintenance etc. often can not get paying attention to, and causes guardrail base concrete to have mass defect.
In order to guarantee the effective force of anticollision barrier base and beam body, guardrail base concrete adopts cast in place process more, and steel form is as guardrail base inner side template, and prefabricated hanging block is as outboard template.Guardrail total length is to be four times in bridge length, and for some long-span bridge, guardrail base reaches dozens or even hundreds of kilometer.Will within the short as far as possible time, complete that guardrail base is concrete builds, or increase template number, or form removal in advance, increasing template number will certainly increase engineering and drop into, and construction enterprises are unwilling to bear; Although in advance form removal can improve template turn-around speed, accelerating construction progress, concrete quality will be affected, and the operation such as the dismounting of template, polishing, installation still accounts for the larger time.If form removal is too early, guardrail base concrete tends to occur early stage dehydration cracking, the phenomenons such as local arrisdefect; If template polishing is not careful, concrete surface quality is just poor; If install too fastly,, just easily there is the problems such as spillage, faulting of slab ends in piece imprecision.
Summary of the invention
Task of the present invention is to solve in prior art uses steel form to build the defect that anticollision barrier concrete bed technical approach exists, provide a kind of for free removal template inside anticollision barrier concrete bed, and the application process that a kind of above-mentioned free removal template is provided.
Its technical solution is:
For a free removal template inside anticollision barrier concrete bed, comprise prefabricated plate, prefabricated plate adopts high performance cement-based material to make.
Above-mentioned prefabricated plate, for guardrail concrete bed inner side, combines with the guardrail concrete bed of coagulation forming after guardrail base concreting.
The thickness of above-mentioned prefabricated plate is 2.5～3.0cm, and height is identical with anticollision barrier base, and length is 200～300cm.
For an application process for free removal template inside anticollision barrier concrete bed, comprise early-stage preparations step and build step, above-mentioned early-stage preparations step comprises: prepare some prefabricated plates and some guardrail link plates, prefabricated plate wherein adopts high performance cement-based material to make, inner side template using prefabricated plate as guardrail concrete bed, with square wood strip and anchor bolt, in a side of prefabricated plate, carry out spacing, cushion block with colligation on guardrail base reinforcing bar carries out spacing at the opposite side of prefabricated plate, at square wood strip, near the bottom of prefabricated plate one side, reserving a section is square breach, in breach, place an aerated capsule, utilize the space between aerated capsule sealing back and prefabricated plate, mortar leakage prevention, utilize the back-pressure nut at anchor bolt top and to square wood strip, carry out spacing around the rope chain of guardrail base, and make square wood strip, aerated capsule and prefabricated plate keep close contact, after above-mentioned early-stage preparations step completes, start to build step, carry out at the scene guardrail base pouring concrete, build and after maintenance completes, prefabricated plate and guardrail base concrete combine.
Above-mentioned early-stage preparations step comprises following concrete steps:
Step 1, stands up prefabricated plate on beam flange plate, and is placed in the inner side of reinforcing bar in guardrail base, in prefabricated plate and guardrail base, between reinforcing bar, by cushion block, is supported, and the selective basis reinforcement cover design thickness of cushion block is determined;
Step 2, anchor bolt is set on beam flange plate, between anchor bolt and prefabricated plate, leave for laying the gap of square wood strip, square wood strip is placed between anchor bolt and prefabricated plate, square wood strip contacts with beam flange plate, prefabricated plate simultaneously, in the breach of square wood strip, places aerated capsule;
Step 3, is connected to one end of above-mentioned rope chain on back-pressure nut, and it is upper that the other end is connected to hook, and the bottom of being caught on guardrail link plate by hook arranges the regulating sleeve that can regulate rope chain relaxation degree in the stage casing of rope chain; At the top of prefabricated plate and guardrail link plate, an isodiametric round steel pipe is set respectively, between two round steel pipe, transverse support bar is set, above-mentioned rope chain is walked around round steel pipe.
The present invention uses the prefabricated plate made by high performance cement-based material as the inner side template of anticollision barrier concrete bed, and the ability of destroying for improving anticollision barrier base inner side opposing deicer salts is accelerated the construction speed of guardrail base.With square wood strip and anchor bolt, realize the inner side limiting-position of prefabricated plate, the cushion block with colligation on guardrail base reinforcing bar is realized the spacing of opposite side; Space (breach) at square wood strip near the reserved square cross-section of a side of prefabricated plate, a built-in aerated capsule, utilizes the space between aerated capsule sealing back and prefabricated plate, avoids spillage.Utilize the back-pressure nut at anchor bolt top and the rope chain of ring guardrail base to realize the spacing of square wood strip and guaranteed the close contact of square wood strip, aerated capsule and prefabricated plate.Rope chain one end of ring guardrail base connects back-pressure nut, the other end connects the link plate bottom in guardrail base outside, the middle regulating sleeve with length adjustable is connected, prefabricated plate and guardrail link plate top arrange respectively an isodiametric round steel pipe, and the transverse support bar of some is set between two round steel pipe.By adjusting the length of regulating sleeve, realize the relaxation of rope chain, thereby realize the Horizontal limiting at prefabricated plate top.When prefabricated plate occurs that part or overall durability are destroyed, can change full wafer thin plate and retain guardrail base main body and do not change, can significantly reduce maintenance workload and maintenance cost.
Above-mentioned prefabricated plate adopts high performance cement-based material moulding in precasting yard, maintenance, by preferred material, proportioning and precasting process, can make it possess high strength, high tenacity, high resistance deicer salts erosiveness completely; In addition, select commercially available high performance cement-based material at present just can realize above-mentioned purpose.Inside anticollision barrier base, thickness of protection tier is generally 4cm; the thickness of prefabricated plate can be set to 2.5 ~ 3.0cm, and every 200cm, as a sections, supposes the high 60cm of guardrail base; the weight of every prefabricated plate is about 70kg ~ 85kg, and two workmans can realize its carrying and install.
With above-mentioned prefabricated plate, as guardrail base inner side template, can save the operations such as form removable, polishing, shorten on-site construction time, the more important thing is that the surface part of guardrail base possesses good military service performance, can save the expense of anticorrosive coating.When there is durability damage in prefabricated plate part or integral body, can only change thin plate and retain guardrail base main body and not change, can save a large amount of maintenance costs.
The present invention has following useful technique effect:
The principle of the invention is clear and definite, simple to operate, can guarantee the ability that guardrail base opposing deicer salts corrodes, can accelerate guardrail base speed of application, during operation, prefabricated plate is changed easily, can save a large amount of maintenances and replacement cost, in general, technology and remarkable in economical benefits.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is illustrated further:
Figure is for the structural principle schematic diagram of a kind of embodiment of application process of free removal template inside anticollision barrier concrete bed in the present invention.
In figure: 1. beam flange plate, 2. prefabricated plate, 3. guardrail link plate, 4. reinforcing bar, 5. anchor bolt, 6. back-pressure nut in base, 7. square wood strip, 8. aerated capsule, 9. cushion block, 10. rope chain, 11. round steel pipe, 12. regulating sleeves, 13. sleeve handles, 14. transverse support bar, 15. hooks.
The specific embodiment
For a free removal template inside anticollision barrier concrete bed, comprise prefabricated plate, prefabricated plate adopts high performance cement-based material to make.Above-mentioned prefabricated plate, for guardrail concrete bed inner side, combines with the guardrail concrete bed of coagulation forming after guardrail base concreting.The thickness of above-mentioned prefabricated plate is 2.5～3.0cm, and height is identical with anticollision barrier base, and length is 200～300cm; Preferred length is 200cm.
Referring to accompanying drawing, a kind of application process for free removal template inside anticollision barrier concrete bed, comprises following content:
By reinforcing bar 4 straightening in the base at beam flange plate 1 top, according to the thickness of reinforcement cover design thickness and prefabricated plate 2, select and install cushion block 9.
According to the cross dimensions of square wood strip 7, at the top of beam flange plate 1, be anchor bolt 5 unwrapping wire, and select suitable interval anchor bolt 5 to be fixed on to the top of beam flange plate 1, the square wood strip 7 that aerated capsule 8 is housed is arranged on to anchor bolt 5 and prefabricated plate 2 intermediate gap, utilizes fixedly square wood strip 7 of back-pressure nut 6.
An isodiametric round steel pipe 11 is set respectively at the top of prefabricated plate 2 tops and link plate 3, and the two ends of each transverse support bar 14 are welded together with two round steel pipe 11 respectively, transverse support bar can arrange some, and can arrange successively at certain interval.
Rope chain 10 one end are fixed on back-pressure nut 6 places, and the other end is walked around round steel pipe 11, by regulating sleeve 12, are connected with the hook 15 that is fixed on guardrail link plate 3 bottoms.The length of adjusting regulating sleeve 12 by sleeve handle 13, realizes the Horizontal limiting at 10 pairs of square wood strips 7 of rope chain and prefabricated plate 2 tops thus.
Until prefabricated plate 2 accurately behind location, to inflation in aerated capsule 8, reach after certain pressure, start that guardrail base is concrete builds and maintenance.When guardrail base cast-in-situ concrete reaches a length of time, aerated capsule 8 venting, turnbarrel handle 13, extract hook 15, remove back-pressure nut 6, anchor bolt 5, then remove square wood strip 7, the guardrail concrete bed of prefabricated plate and coagulation forming combines.And then the template frame that carries out other section anticollision barrier that joins is vertical.
The relevant technologies content of not addressing in aforesaid way is taked or is used for reference prior art and can realize.
It should be noted that, under the instruction of this manual, those skilled in the art can also make such or such easy variation pattern, such as equivalent way, or obvious mode of texturing.Above-mentioned variation pattern all should be within protection scope of the present invention.
Claims (2)
1. for an application process for free removal template inside anticollision barrier concrete bed, it is characterized in that comprising early-stage preparations step and build step, above-mentioned early-stage preparations step comprises: prepare some prefabricated plates and some guardrail link plates, prefabricated plate wherein adopts high performance cement-based material to make, inner side template using prefabricated plate as guardrail concrete bed, with square wood strip and anchor bolt, in a side of prefabricated plate, carry out spacing, cushion block with colligation on guardrail base reinforcing bar carries out spacing at the opposite side of prefabricated plate, at square wood strip, near the bottom of prefabricated plate one side, reserving a section is square breach, in breach, place an aerated capsule, utilize the space between aerated capsule sealing back and prefabricated plate, mortar leakage prevention, utilize the back-pressure nut at anchor bolt top and to square wood strip, carry out spacing around the rope chain of guardrail base, and make square wood strip, aerated capsule and prefabricated plate keep close contact, after above-mentioned early-stage preparations step completes, start to build step, carry out at the scene guardrail base pouring concrete, build and after maintenance completes, prefabricated plate and guardrail base concrete combine.
2. a kind of application process for free removal template inside anticollision barrier concrete bed according to claim 1, is characterized in that: above-mentioned early-stage preparations step comprises following concrete steps:
Step 1, stands up prefabricated plate on beam flange plate, and is placed in the inner side of reinforcing bar in guardrail base, in prefabricated plate and guardrail base, between reinforcing bar, by cushion block, is supported, and the selective basis reinforcement cover design thickness of cushion block is determined;
Step 2, anchor bolt is set on beam flange plate, between anchor bolt and prefabricated plate, leave for laying the gap of square wood strip, square wood strip is placed between anchor bolt and prefabricated plate, square wood strip contacts with beam flange plate, prefabricated plate simultaneously, in the breach of square wood strip, places aerated capsule;
Step 3, is connected to one end of above-mentioned rope chain on back-pressure nut, and it is upper that the other end is connected to hook, and the bottom of being caught on guardrail link plate by hook arranges the regulating sleeve that can regulate rope chain relaxation degree in the stage casing of rope chain; At the top of prefabricated plate and guardrail link plate, an isodiametric round steel pipe is set respectively, between two round steel pipe, transverse support bar is set, above-mentioned rope chain is walked around round steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434414.6A CN102912748B (en) | 2012-11-05 | 2012-11-05 | Removal-free template on inner side of concrete base of anti-collision guardrail and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434414.6A CN102912748B (en) | 2012-11-05 | 2012-11-05 | Removal-free template on inner side of concrete base of anti-collision guardrail and application method thereof |
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| CN102912748A CN102912748A (en) | 2013-02-06 |
| CN102912748B true CN102912748B (en) | 2014-03-12 |
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| CN201210434414.6A Expired - Fee Related CN102912748B (en) | 2012-11-05 | 2012-11-05 | Removal-free template on inner side of concrete base of anti-collision guardrail and application method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195949B (en) * | 2013-03-12 | 2016-02-10 | 青岛林川工程技术咨询有限公司 | A kind of baffle plate for gap bottom shutoff guardrail link plate and using method thereof |
| CN103821089A (en) * | 2014-02-25 | 2014-05-28 | 中天建设集团有限公司 | Outwards-wrapped-type anti-collision guardrail construction method |
| CN107327050B (en) * | 2017-08-28 | 2022-11-08 | 武汉建工集团股份有限公司 | Disassembly-free basement exterior wall flanging unilateral formwork supporting device and construction method |
| CN109338897A (en) * | 2018-11-29 | 2019-02-15 | 中国冶集团有限公司 | Bridge structure object bottom leakproof sizing device and its construction method |
| CN114032770A (en) * | 2021-10-20 | 2022-02-11 | 中国建筑第七工程局有限公司 | Construction method of cast-in-place concrete anti-collision guardrail for expressway bridge in earthquake-prone area |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2305454Y (en) * | 1997-08-14 | 1999-01-27 | 柏飞 | Disassembling-free framework for concrete column and beam |
| CN101550736A (en) * | 2009-05-13 | 2009-10-07 | 顾小林 | Method for casting in-situ composite lightweight wall by detaching-free template and equipment thereof |
| CN101566004A (en) * | 2009-05-26 | 2009-10-28 | 纪瑞星 | Concrete template |
| CN102108677A (en) * | 2010-12-31 | 2011-06-29 | 青建集团股份公司 | Detachment-free construction method for internal framework of box beam |
| CN202830759U (en) * | 2012-11-05 | 2013-03-27 | 山东高速青岛公路有限公司 | Non-dismantling template applied to inner side of anti-collision guardrail concrete-base |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3230121B2 (en) * | 1993-12-28 | 2001-11-19 | 岡部株式会社 | Formwork equipment |
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2012
- 2012-11-05 CN CN201210434414.6A patent/CN102912748B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2305454Y (en) * | 1997-08-14 | 1999-01-27 | 柏飞 | Disassembling-free framework for concrete column and beam |
| CN101550736A (en) * | 2009-05-13 | 2009-10-07 | 顾小林 | Method for casting in-situ composite lightweight wall by detaching-free template and equipment thereof |
| CN101566004A (en) * | 2009-05-26 | 2009-10-28 | 纪瑞星 | Concrete template |
| CN102108677A (en) * | 2010-12-31 | 2011-06-29 | 青建集团股份公司 | Detachment-free construction method for internal framework of box beam |
| CN202830759U (en) * | 2012-11-05 | 2013-03-27 | 山东高速青岛公路有限公司 | Non-dismantling template applied to inner side of anti-collision guardrail concrete-base |
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Owner name: CRBC INTERNATIONAL CO., LTD. Effective date: 20131022 Owner name: GANSU ROAD AND BRIDGE CONSTRUCTION GROUP CO., LTD. Free format text: FORMER OWNER: CRBC INTERNATIONAL CO., LTD. Effective date: 20131022 |
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Inventor after: Liu Jianxun Inventor after: Cao Hui Inventor after: Yang Xiaobo Inventor after: Wu Zhikui Inventor after: Zhang Changqing Inventor after: Wang Weiqiao Inventor after: Yang Le Inventor after: Zhang Jindong Inventor after: Yan Hongli Inventor after: Cui Jipeng Inventor after: Diao Rongting Inventor after: Guo Baolin Inventor after: Zhang Lingtao Inventor after: Hou Zhibin Inventor after: Li Zhenhai Inventor after: Shao Xinpeng Inventor after: Yang Wenji Inventor after: Hu Jiabo Inventor after: He Shixiong Inventor after: Sun Rishuang Inventor after: Jiang Min Inventor after: Zhu Jupeng Inventor before: Guo Baolin Inventor before: Zhang Jindong Inventor before: Yan Hongli Inventor before: Cui Jipeng Inventor before: Diao Rongting Inventor before: Zhang Lingtao Inventor before: Hou Zhibin Inventor before: Li Zhenhai Inventor before: Shao Xinpeng Inventor before: Hu Jiabo Inventor before: Sun Rishuang Inventor before: Zhu Jupeng Inventor before: Yang Xiaobo Inventor before: Zhang Changqing Inventor before: Wang Weiqiao Inventor before: Yang Le |
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