CN202117320U - Circular mold anti-floating device in circulating water pipe ditch - Google Patents
Circular mold anti-floating device in circulating water pipe ditch Download PDFInfo
- Publication number
- CN202117320U CN202117320U CN2011202182970U CN201120218297U CN202117320U CN 202117320 U CN202117320 U CN 202117320U CN 2011202182970 U CN2011202182970 U CN 2011202182970U CN 201120218297 U CN201120218297 U CN 201120218297U CN 202117320 U CN202117320 U CN 202117320U
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- China
- Prior art keywords
- pipe trench
- reinforcing bar
- concrete
- wire rope
- water pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000007667 floating Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 239000004567 concrete Substances 0.000 claims abstract description 53
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 36
- 238000005452 bending Methods 0.000 claims description 8
- 241000446313 Lamella Species 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 15
- 239000010410 layer Substances 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 1
- 239000012791 sliding layer Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 34
- 229910052742 iron Inorganic materials 0.000 description 17
- 238000010276 construction Methods 0.000 description 10
- 238000009415 formwork Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000015895 biscuits Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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Abstract
The utility model relates to a circle mould anti-floating device in circulating water pipe ditch, including wire rope and reinforcing bar anchor ring, still include shaped steel roof beam, shaped steel roof beam frame is establishing pipe ditch centre form top surface, and the outer wall of intending to pour the pipe ditch is chosen in its both ends overhang, reinforcing bar anchor ring is pre-buried in the concrete pad in the pipe ditch outside, shaped steel roof beam passes through wire rope and reinforcing bar anchor ring drawknot, it has the bed of a shoe to fill up between shaped steel roof beam and the steel support, the wire rope both ends all are provided with the chain block who is used for taut wire rope, the surface of concrete pad layer is spread PE membrane sliding layer. The device can realize free extension and retraction of the pipe ditch concrete in the hardening process, release the shrinkage stress and avoid the crack generation of the formed pipe ditch concrete. Meanwhile, the method has the advantages of being reusable, strong in applicability and the like, and can be widely applied to anti-floating of the pipe ditch inner mold.
Description
Technical field
The utility model relates to a kind of internal mold anti-floating system, particularly a kind of nuclear power station recirculated water pipe trench internal mold anti-floating system.
Background technology
Nuclear power station recirculated water pipe trench is a monolithic reinforced concrete structure; Inlet segment is designed to the square-outside and round-inside type; Interior circular hole is a hydraulic pipeline, is designed with that two holes are stacked arranges two kinds with single hole, and internal diameter is generally 3600mm ~ 4400mm; At present job practices mainly is divided in the middle of pipe trench, staying and establishes horizontal construction joint one, divides job practices that secondary builds and the job practices of not establishing complete section monobloc cast of constuction joint with pipe trench; No matter being to adopt which kind of method, all can internally justify mould during concreting and producing bigger buoyancy, is opposing buoyancy, and round mould floats and causes the template displacement in when construction, must taking measures to prevent.The measure of anti float that present domestic each unit in charge of construction is taked is inconsistent; Comparatively common method is an embedded bar anchor ring in the bed course of the pipe trench inside concrete of interior round mould both sides and alternative concrete; Wire rope is entangled interior circle mould from the top; Wire rope two and reinforcing bar anchor ring drawknot are fixed interior round mould, resist concrete buoyancy; Anchor ring finally is cast in the pipe trench concrete.Though this method easy construction; But because the reinforcing bar anchor ring links together pipe trench and bed course and alternative concrete; Make the pipe trench concrete receive the effect of contraction of reinforcing bar anchor ring; The pipe trench concrete is out of shape shrinkage stress and can't discharges and produce than multiple cracking in hardening process, influence concrete impervious and endurance quality.
The utility model content
The purpose of the utility model provides circle mould anti-floating system in a kind of recirculated water pipe trench; Solve traditional anti-floating system; Pipe trench concrete shrinkage stress in hardening process can't freely discharge owing to the restriction of bottom cushion, causes the technical problem in the concrete generation of the pipe trench crack of moulding.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
Circle mould anti-floating system in a kind of recirculated water pipe trench; Comprise wire rope and reinforcing bar anchor ring, also comprise section steel beam, said shaped steel roof beam structure is being established pipe trench internal mold end face; Its two ends plan of encorbelmenting is built the outer wall of pipe trench; Said reinforcing bar anchor ring is embedded in the concrete cushion in the pipe trench outside, and said section steel beam is lined with pad side through wire rope and reinforcing bar anchor ring drawknot between said section steel beam and the steel bracket; Said wire rope two ends are provided with the Chain block that is used for tense wire rope, and the surface of said concrete cushion is covered with PE film glide lamella.
Be supported with shape steel bracket between said pipe trench internal mold end face and the section steel beam.
Said shape steel bracket is made up of the reinforcing bar of arc, flat board and radial distribution, and said reinforcing bar props up and withstands between arc and the flat board.
Be lined with concrete pad between said shape steel bracket and the pad side.
Said pad side is flitch or shaped steel.
The length two ends that the plan of encorbelmenting of said section steel beam is built the outer wall of pipe trench all are no less than 60cm.
Said reinforcing bar anchor ring is the Ω type that the reinforcing bar bending forms, and the length of its horizontal bending segment is no less than 30 times bar diameter, and its last portion has crotch, and horizontal bending segment upper surface is provided with reinforced mesh.
Compared with prior art the utlity model has following characteristics and beneficial effect:
The utility model is owing to be provided with PE film glide lamella on concrete cushion; And the section steel beam of encorbelmenting through setting is arranged on anti-floating system and intends outside the pipe trench outer walls of concrete of building; Thereby reduce the frictional force of pipe trench concrete and concrete mats interlayer, eliminated the effect of contraction between pipe trench concrete and the blinding concrete, be convenient to the pipe trench concrete and in hardening process, can freely stretch; Discharge shrinkage stress, avoided moulding pipe trench concrete to produce the crack.
The utility model not only can be applicable to recirculated water pipe trench one hole and has divided the job practices that secondary builds but also can be applicable in the complete section monobloc cast method, and applicability is strong.
The said anti-floating system of the utility model adopts the section steel beam of encorbelmenting that anti-floating system is set, so corresponding reinforcing bar anchor ring is arranged on outside the pipe trench outer walls of concrete, finishes dismountable the recycling in back in construction, helps energy conservation.
The utility model can be widely used in the anti-floating construction of pipe trench internal mold.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Fig. 1 is the utility model embodiment one.
Fig. 2 is the utility model embodiment two.
Fig. 3 is a reinforcing bar anchor ring detail drawing.
Reference numeral: 1-pipe trench internal mold, 2-wire rope, 3-reinforcing bar anchor ring, 3.1-crotch, 4-pad side, 5-section steel beam, 6-concrete cushion, 7-shape steel bracket, 7.1-flat board, 7.2-arc, 7.3-reinforcing bar, 8-concrete pad, 9-Chain block, 10-intend and build pipe trench, 11-PE film glide lamella, 12-reinforced mesh.
The specific embodiment
Embodiment one is circle mould anti-floating system in the recirculated water pipe trench in the full section monobloc cast method referring to shown in Figure 1, and the pipe trench internal mold is circular; Comprise wire rope 2 and reinforcing bar anchor ring 3, also comprise section steel beam 5,5 of said section steel beams are being established pipe trench internal mold 1 end face; Its two ends plan of encorbelmenting is built the outer wall of pipe trench 10; Said reinforcing bar anchor ring 3 is embedded in the concrete cushion 6 in the pipe trench outside, and said section steel beam 5 is lined with pad side 4 through wire rope 2 and reinforcing bar anchor ring 3 drawknots between said section steel beam 5 and the steel bracket 7; Said wire rope 2 two ends are provided with the Chain block 9 that is used for tense wire rope, and the surface of said concrete cushion 6 is covered with PE (polyvinyl) film glide lamella 11.Be supported with shape steel bracket 7 between said pipe trench internal mold 1 end face and the section steel beam 5.Said shape steel bracket 7 is made up of the reinforcing bar 7.3 of arc 7.2, flat board 7.1 and radial distribution, and 7.3 of said reinforcing bars withstand between arc 7.2 and dull and stereotyped 7.1.Be lined with concrete pad 8 between said shape steel bracket 7 and the pad side 4.Said pad side 4 is flitch or shaped steel.The length two ends that the plan of encorbelmenting of said section steel beam 5 is built the outer wall of pipe trench 10 all are no less than 60cm.Section steel beam be two superimposed.
Embodiment two is referring to shown in Figure 2; For dividing in the job practices that secondary builds circle mould anti-floating system in the phase I recirculated water pipe trench in recirculated water pipe trench one hole; Different with embodiment one is said pipe trench internal mold 1 is for semicircle, and 4 bottom surfaces, said pad side ride on the steel joist of pipe trench internal mold 1, end face support type girder steel; No shape steel bracket 7 between said pipe trench internal mold 1 end face and the section steel beam 5 need not to fill up concrete pad between pipe trench internal mold 1 end face and the pad side 4.Said section steel beam is one, and recirculated water pipe trench one hole divides the anti-floating system of second stage in the job practices that secondary builds with embodiment one.
Above-mentioned reinforcing bar anchor ring 3 detail drawings are referring to Fig. 3, and said reinforcing bar anchor ring 3 bends the Ω type that forms for reinforcing bar, and the length of its horizontal bending segment is no less than 30 times bar diameter, and its last portion has crotch 3.1, and the setting of horizontal bending segment upper surface prevents reinforced mesh 12.
The practical implementation process of pipe trench anti-floating system is following:
Step 1: anti-floating design:
Before construction, must calculate the buoyancy size of concrete to the pipe trench internal mold, according to model, the spacing of the buoyancy calculations section steel beam that is produced, concrete data such as the diameter of the diameter of wire rope and reinforcing bar anchor ring are carried out schematic design.The GENERAL TYPE girder steel adopts worker 20a, when the bigger single i iron of caliber can not satisfy force request, can adopt the method for double joint i iron stack; Wire rope adopts Φ 9.3mm, and the reinforcing bar anchor ring adopts Φ 20mm reinforcing bar.
The model of anti-floating i iron will be carried out confirming after the amount of deflection checking computations through the size of concrete to pipe trench internal mold generation buoyancy.Wherein concrete generation buoyancy is basic calculating formula with the Archimedes' principle; And take into full account concrete under flow regime with the different in kind of neat liquid; Characteristics with very big toughness; Repeatedly observe anti-floating i iron practical distortion value through the scene, derive the empirical formula of concrete buoyancy: promptly just pouring concrete under flow regime to being immersed in the buoyancy size F that its inner template produces
FloatingTemplate arranges 1/3 of concrete gravity for this reason.Empirical formula is following:
F
Floating=1/3* ρ
Concrete* g*V
Row
F
Floating---be immersed in the buoyancy N that template receives in the biscuit fire chutable concrete
ρ
Concrete---concrete proportion, get 2400Kg/m
3
G---N and Kg unit conversion coefficient, 1Kg=9.8N
V
Row---be immersed in that object arranges concrete volume m in the concrete
3
Through above empirical formula, just can calculate the buoyancy of concrete to pipe trench internal mold and i iron generation, calculate the amount of deflection of i iron, amount of deflection must not be greater than L/400 (L be the length between the wire rope drawknot point of i iron two ends).
The come-up space that should reserve when confirming to install the pipe trench internal mold according to the deflection value that calculates, promptly the pipe trench internal mold installs highly and should be lower than design elevation.
Step 2: referring to accompanying drawing 3, pre-buried anti-floating reinforcing bar anchor ring
Before construction concrete cushion and the alternative concrete, apart from pipe trench outside 500mm place, the spacing embedded bar anchor ring identical with the anti-floating i iron, the completion earth anchor is pre-buried after the concreting.
Step 3: the anti-floating steel I-beam is installed
At first, lay PE film glide lamella earlier, reduce the frictional force between pipe trench concrete and bed course, in hardening process so that the pipe trench concrete can freely stretch in the pipe trench bottom;
Secondly, install pipe trench internal mold bottom shape steel bracket, pipe trench internal mold, exterior sheathing, all members of design drawings such as the reinforcing bar design of the required colligation of this layer concreting install, and the pipe trench internal mold is installed and will be reserved the height that the anti-floating i iron calculates amount of deflection;
Moreover: the job practices of being taked according to the recirculated water pipe trench is different, takes different anti-floating systems.Adopt full section monobloc cast job practices for the recirculated water pipe trench; Referring to shown in Figure 1; Put pipe trench internal mold top shape steel bracket by the spacing of computation schemes; On shape steel bracket, put the anti-floating i iron, the space between i iron and shape steel bracket must be with flitch or shaped steel pad jail, so that the pressure of i iron can directly be sent to the pipe trench internal mold; The anti-floating i iron of the second stage of secondary casting method construction installs that step is identical therewith.For the recirculated water pipe trench is the phase I of secondary pouring construction method; Referring to shown in Figure 2; The pipe trench internal mold is the little arc formwork of full circle bottom; After arc formwork installs, can place the anti-floating i iron, tight between the steel joist of i iron and arc formwork with flitch or shaped steel pad, with the complete section whole method of watering install anti-floating system different be the shape steel bracket that need not to install round mould top.
Step 4: the anti-floating wire rope is installed.
After the anti-floating i iron has been put, be connected with wire rope, and with the Chain block tension,------anti-floating i iron---pipe trench internal mold---pipe trench internal mold bottom shape steel bracket forms complete stress system to wire rope to make anchor ring between i iron and reinforcing bar anchor ring.
Claims (7)
1. justify the mould anti-floating system in a recirculated water pipe trench; Comprise wire rope (2) and reinforcing bar anchor ring (3); It is characterized in that: also comprise section steel beam (5); Said section steel beam (5) frame is being established pipe trench internal mold (1) end face, and its two ends plan of encorbelmenting is built the outer wall of pipe trench (10), and said reinforcing bar anchor ring (3) is embedded in the concrete cushion (6) in the pipe trench outside; Said section steel beam (5) is through wire rope (2) and reinforcing bar anchor ring (3) drawknot; Be lined with pad side (4) between said section steel beam (5) and the steel bracket (7), said wire rope (2) two ends are provided with the Chain block (9) that is used for tense wire rope, and the surface of said concrete cushion (6) is covered with PE film glide lamella (11).
2. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1, it is characterized in that: be supported with shape steel bracket (7) between said pipe trench internal mold (1) end face and the section steel beam (5).
3. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1; It is characterized in that: said shape steel bracket (7) is made up of the reinforcing bar (7.3) of arc (7.2), dull and stereotyped (7.1) and radial distribution, and said reinforcing bar (7.3) props up and withstands between arc (7.2) and dull and stereotyped (7.1).
4. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1, it is characterized in that: be lined with concrete pad (8) between said shape steel bracket (7) and pad side (4).
5. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1, it is characterized in that: said pad side (4) are flitch or shaped steel.
6. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1, it is characterized in that: the length two ends that the plan of encorbelmenting of said section steel beam (5) is built the outer wall of pipe trench (10) all are no less than 60cm.
7. according to circle mould anti-floating system in the said recirculated water pipe trench of claim 1; It is characterized in that: the Ω type that said reinforcing bar anchor ring (3) forms for the reinforcing bar bending; The length of its horizontal bending segment is no less than 30 times bar diameter; Its last portion has crotch (3.1), and horizontal bending segment upper surface is provided with reinforced mesh (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202182970U CN202117320U (en) | 2011-06-27 | 2011-06-27 | Circular mold anti-floating device in circulating water pipe ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202182970U CN202117320U (en) | 2011-06-27 | 2011-06-27 | Circular mold anti-floating device in circulating water pipe ditch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117320U true CN202117320U (en) | 2012-01-18 |
Family
ID=45458394
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202182970U Expired - Fee Related CN202117320U (en) | 2011-06-27 | 2011-06-27 | Circular mold anti-floating device in circulating water pipe ditch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117320U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821150A (en) * | 2014-03-03 | 2014-05-28 | 山东电力建设第二工程公司 | Construction device for reverse channel formwork |
| CN108894206A (en) * | 2018-07-25 | 2018-11-27 | 中国冶集团有限公司 | Shoal sewage pipe, well anti-floating system and construction method |
| CN109780322A (en) * | 2019-01-21 | 2019-05-21 | 北京通成达水务建设有限公司 | A kind of reinforcement means of pouring heavy-caliber steel pipe side template |
| CN112160771A (en) * | 2020-11-06 | 2021-01-01 | 湖南五新模板有限公司 | Upward-floating-prevention overhead arch formwork system |
-
2011
- 2011-06-27 CN CN2011202182970U patent/CN202117320U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821150A (en) * | 2014-03-03 | 2014-05-28 | 山东电力建设第二工程公司 | Construction device for reverse channel formwork |
| CN103821150B (en) * | 2014-03-03 | 2016-01-20 | 山东电力建设第二工程公司 | The anti-formwork construction device of raceway groove |
| CN108894206A (en) * | 2018-07-25 | 2018-11-27 | 中国冶集团有限公司 | Shoal sewage pipe, well anti-floating system and construction method |
| CN108894206B (en) * | 2018-07-25 | 2020-10-23 | 中国一冶集团有限公司 | Sandbar sewage pipe and well anti-floating system and construction method |
| CN109780322A (en) * | 2019-01-21 | 2019-05-21 | 北京通成达水务建设有限公司 | A kind of reinforcement means of pouring heavy-caliber steel pipe side template |
| CN109780322B (en) * | 2019-01-21 | 2020-11-03 | 北京通成达水务建设有限公司 | Reinforcing method for pouring large-diameter steel pipe side template |
| CN112160771A (en) * | 2020-11-06 | 2021-01-01 | 湖南五新模板有限公司 | Upward-floating-prevention overhead arch formwork system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20120627 |