CN103526947B - Slow-bonding prestress construction method suitable for staged construction of different structural parts - Google Patents
Slow-bonding prestress construction method suitable for staged construction of different structural parts Download PDFInfo
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- CN103526947B CN103526947B CN201310433108.5A CN201310433108A CN103526947B CN 103526947 B CN103526947 B CN 103526947B CN 201310433108 A CN201310433108 A CN 201310433108A CN 103526947 B CN103526947 B CN 103526947B
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- construction
- service sleeve
- steel strand
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- slow
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- 238000010276 construction Methods 0.000 title claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims description 48
- 239000010959 steel Substances 0.000 claims description 48
- 239000000853 adhesive Substances 0.000 claims description 36
- 230000001070 adhesive effect Effects 0.000 claims description 35
- 239000004033 plastic Substances 0.000 claims description 29
- 229920003023 plastic Polymers 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 210000002435 tendon Anatomy 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000007767 bonding agent Substances 0.000 abstract 3
- 230000003111 delayed effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a construction method of slow-bonding prestress suitable for different structure part stage construction, which is characterized in that in order to ensure that the construction progress of a site is adapted to the service life of a slow bonding agent, a sleeve device with a special structure is pre-embedded in a construction structure part, the slow bonding agent is injected into the sleeve when the construction of a construction part is carried out later, a sheath of a prestressed tendon is removed, the sleeve is penetrated into the prestressed tendon, the prestressed tendon of the construction part is a normal tendon with the sheath, and after the two parts of concrete reach the designed strength, a prestressed stranded wire is integrally tensioned, so that the slow bonding agent is in the tensioning service life when being tensioned, and the aim of integrally applying the prestress to a structure can be realized according to the construction arrangement of the construction site. The method can be widely applied to the condition that the slow bonding prestress technology is adopted, the construction period is long, and the same structure is constructed in stages.
Description
Technical field
The present invention relates to a kind of pre-stressed construction method, particularly a kind of pre-stressed construction method adopting slow cohesion agent.
Background technology
Retarded adhesive prestressed is having the novel pre-stressed technology of one that bonding and Non-cohesive Prestressing Force Technology basis grow up, both there is the technical characterstic that Unbonded prestressed is convenient and bonded prestress structure ductility is good, anti-seismic performance is superior, identical with prestressing without bondn again when constructing, have and do not need pore-forming, too large space can not be occupied in beam slab, stretching end flexible arrangement, the advantages such as tensioning equipment is simple to operation.In addition, after retarded adhesive prestressed construction completes, slow cohesion agent is hardened gradually, and presstressed reinforcing steel and concrete structure are bonded to entirety, and member section can not be caused to weaken, and therefore, its anti-fatigue performance and anti-seismic performance are all better than prestressing without bondn.
Two key technical index in retarded adhesive prestressed construction are stretch-draw working life and hardening time.Stretch-draw refers to that slow cohesion agent is from being formulated into the time being still suitable for slow-adhesion prestress steel strand stretch-draw working life; Refer to that the time of prescribed strength is solidified, reaching in slow cohesion agent completely from being formulated into hardening time.
The construction process of retarded adhesive prestressed beam, plate is: strutbeam, plate bed die → colligation plain bars → prestressed positioning bar, simultaneously prestress wire is in factory's fixed-length blanking → assembling anchored end → be transported to scene, and after prestressed positioning bar completes, lay is transported to the delayed bonding prestressed tendon → strutbeam at scene, plate end mould and side form → concreting → maintenance and reaches design strength → stretch-draw prestressing force → end portion treatment.
The construction process of retarded adhesive prestressed post is: colligation plain bars → prestressed positioning bar, simultaneously prestress wire is in factory's fixed-length blanking → assembling anchored end → be transported to scene, and delayed bonding prestressed tendon → pillar mould → concreting → maintenance that lay is transported to scene after prestressed positioning bar completes reaches design strength → stretch-draw prestressing force → end portion treatment.
In above-mentioned construction process, preparation and the production of slow cohesion agent is carried out during factory's blanking, by the restriction of slow cohesion agent stretch-draw working life, from preparation is produced, the stretch-draw of prestress wire generally in two months, should be completed, therefore, the production and construction of slow cohesion steel strand needs and site operation progress is combined closely, and when guaranteeing prestressed stretch-draw in construction process, slow cohesion agent was in stretch-draw working life.
But in Practical Project, often there is such problem: the beam of different parts, plate section construction on same structure layer, the now construction of whole Dao Liang, plate total cycle extends greatly; The construction total cycle connecting the post of upper and lower different structure layer is longer.The beam column of section construction just cannot according to unified production and the lay that carry out delayed bonding prestressed tendon of above-mentioned construction process, the delayed bonding prestressed tendon of through whole Dao Liang, plate or post cannot meet from produce to the time of carrying out stretch-draw and adapt working life with stretch-draw.Given this, the scientific and technical personnel of job site want that finding one had both met job site scheduling, meet again the retarded adhesive prestressed construction method of the requirement stage construction of retarded adhesive prestressed stretch-draw working life.
Summary of the invention
The object of this invention is to provide a kind of retarded adhesive prestressed construction method being applicable to the stage construction of different structure position, solve to produce in stretching process for slow-adhesion prestress steel strand and limit working life by slow cohesion agent stretch-draw, the delayed bonding prestressed tendon of through whole Dao Liang, plate or post cannot meet from produce to the technical problem that the time of carrying out stretch-draw to adapt with stretch-draw working life.
For achieving the above object, the present invention adopts following technical scheme:
Be applicable to a retarded adhesive prestressed construction method for different structure position stage construction, step is as follows:
Step one, is welded with bar dowel at service sleeve external surface; And being welded and fixed steel plate at service sleeve one end face, described fixation steel plate center has the diameter circular hole equal with service sleeve internal diameter;
Step 2, aligns the fixation steel plate of the anchor plate of fixed end ground tackle and service sleeve end, and by building adhesive close adhesion integrally;
Step 3, service sleeve, fixation steel plate and the anchor plate integral built-in position at first constructing structure part plan laying steel strand will be formed in step 2, and reserve plastics cave mould at anchor plate lateral surface, and temporary plugging that service sleeve other end mouth of pipe place plastics are blocked a shot;
Step 4, builds the concrete of first constructing structure part, and builds integrally by service sleeve, fixation steel plate, anchor plate, plastics cave mould and structural concrete;
Step 5, until after constructing structure part start to construct time, opens plastics block colloid-injecting gun and slow cohesion agent is injected in service sleeve, and the anchor plate mouth of bottom seals by interim adhesive waterproof tape;
Step 6, rejected by outer for the steel strand in service sleeve length range sheath, and scene penetrates in service sleeve after steel strand surface smears slow cohesion agent; In advance anchor plate is installed in rear constructing structure part simultaneously, and reserved plastics cave mould;
Step 7, silica gel sealing bar is adopted in end below steel strand and the gap between anchor plate hole to block closely, service sleeve and steel strand interface adopt plastic protective glass holder to be connected, and two ends adhesive waterproof tape is by closely knit near service sleeve mouth of pipe place parcel for the steel strand of plastic protective glass holder and reservation sheath;
Step 8, builds the concrete of rear constructing structure part, after rear constructing structure part concrete reaches design strength, installs tension ground tackle;
Step 9, carries out retarded adhesive prestressed stretch-draw to steel strand are unified.
Described bar dowel is interrupted spiral at service sleeve external surface, and the length of single bar dowel is 10cm, and diameter is 6mm.
Described adhesive waterproof tape parcel plastic protective glass holder is no less than 3 layers, packages length >=5cm.
Compared with prior art the present invention has following characteristics and beneficial effect:
By reject at first constructing structure position service sleeve and by the first constructing structure part steel strand section being positioned at sleeve pipe sheath rear surface be coated with slow cohesion agent then constructing structure part steel strand section be the steel strand of the unified band sheath produced, can ensure when rear construction part stretch-draw, all be in stretch-draw period of validity during slow cohesion agent in the end stretch-draw within the scope of whole bundle prestress wire, reach the object of retarded adhesive prestressed construction, guarantee construction quality.
At service sleeve outer surface of tube body welding short steel rod, increase the frictional force between service sleeve and first concreting and bond stress.
By the welding edges fixation steel plate at service sleeve, stability and the compactness of junction can be increased when service sleeve is connected with bearing plate.
By arranging plastic protective glass holder as seal protecting device at band sheath presstressed reinforcing steel and service sleeve connection; And adopt adhesive waterproof tape to the protection of junction enhanced leaktightness, prevent foreign material in work progress from entering service sleeve interface and service sleeve is blocked.
This construction method operation is simple, the unification that working life of slow cohesion agent and job site working procedure arrange is realized by arranging simple device, retarded adhesive prestressed construction is made to get around the restriction of working life, add the flexibility of retarded adhesive prestressed construction, expand the scope of application of retarded adhesive prestressed construction.
The present invention can be widely used in adopting retarded adhesive prestressed technology, and construction period is longer, the situation of same structure construction by stages.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is construction sequence three schematic diagram.
Fig. 2 is construction sequence six schematic diagram.
Fig. 3 is construction sequence eight schematic diagram.
Reference numeral: constructing structure part, 9-steel strand, 10-fixed end ground tackle, the agent of 11-slow cohesion, 12-stretching end ground tackle, 13-plastics cave mould, 14-plastics block after the first constructing structure part of 1-service sleeve, 2-bar dowel, 3-fixation steel plate, 4-plastic protective glass holder, 5-adhesive waterproof tape, 6-anchor plate, 7-, 8-.
Detailed description of the invention
Be applicable to a retarded adhesive prestressed construction method for different structure position stage construction, step is as follows:
Step one, is welded with bar dowel 2 at service sleeve 1 external surface; And being welded and fixed steel plate 3 at service sleeve 1 one end face, described fixation steel plate 3 center has the diameter circular hole equal with service sleeve 1 internal diameter; The square steel plate of described fixation steel plate to be thickness be 8mm;
Step 2, aligns the fixation steel plate 3 of the anchor plate 6 of fixed end ground tackle 10 and service sleeve 1 end, and by building adhesive close adhesion integrally;
Step 3, see Fig. 1, intend laying the position of steel strand 9 in first constructing structure part 7 by forming service sleeve 1, fixation steel plate 3 and anchor plate 6 integral built-in in step 2, and reserve plastics cave mould 13 at anchor plate 6 lateral surface, and 14 temporary pluggings that service sleeve 1 other end mouth of pipe place plastics are blocked a shot; The object arranging plastics block 14 causes cannula occlusion for preventing foreign material in work progress from entering in service sleeve;
Step 4, builds the concrete of first constructing structure part 7, and builds integrally by service sleeve 1, fixation steel plate 3, anchor plate 6, plastics cave mould 13 and structural concrete;
Step 5, until after construction part 8 start to construct time, opens plastics block and 14 with colloid-injecting gun, slow cohesion agent 11 to be injected in service sleeve 1, and the anchor plate mouth of bottom seals by interim adhesive waterproof tape;
Step 6, see Fig. 2, rejected by outer for the steel strand 9 in service sleeve length range sheath, and scene penetrates in service sleeve 1 after the agent of steel strand 9 surface smear slow cohesion; In advance anchor plate is installed in rear constructing structure part 8 simultaneously, and reserved plastics cave mould 13;
Step 7, leak outside to prevent changing cementing agent, silica gel sealing bar is adopted to block closely in the gap of steel strand 9 below between end and anchor plate hole, service sleeve 1 adopts plastic protective glass holder 4 to be connected with steel strand 9 interface, and two ends adhesive waterproof tape 5 is by closely knit near service sleeve 1 mouth of pipe place parcel for the steel strand of plastic protective glass holder 4 and reservation sheath;
Step 8, see Fig. 3, builds the concrete of rear constructing structure part 8, after rear constructing structure part 8 concrete reaches design strength, installs tension ground tackle 12;
Step 9, carries out retarded adhesive prestressed stretch-draw to steel strand 9 are unified.
Described bar dowel 2 is interrupted spiral at service sleeve 1 external surface, and the length of single bar dowel is 10cm, and diameter is 6mm.
Described adhesive waterproof tape 5 wraps up plastic protective glass holder 4 and is no less than 3 layers, packages length >=5cm.
In this construction method, the fabrication and installation when plain bars colligation of presstressed reinforcing steel positioning bar, are fixed together with plain bars.
It should be noted that, this construction method is when implementing, slow cohesion agent in service sleeve arranged to carry out according to the rear constructing structure part construction period with the production time of the slow cohesion agent of producing prestress wire sheath, during stretch-draw, slow cohesion agent was in stretch-draw working life, thus reached the construction object to structural entity Shi Hanzhang.
Claims (3)
1. be applicable to a retarded adhesive prestressed construction method for different structure position stage construction, it is characterized in that: step is as follows:
Step one, is welded with bar dowel (2) at service sleeve (1) external surface; And being welded and fixed steel plate (3) at service sleeve (1) end face, described fixation steel plate (3) center has the diameter circular hole equal with service sleeve (1) internal diameter;
Step 2, aligns the anchor plate (6) of fixed end ground tackle (10) and the fixation steel plate (3) of service sleeve (1) end, and by building adhesive close adhesion integrally;
Step 3, service sleeve (1), fixation steel plate (3) and anchor plate (6) the integral built-in position first constructing structure part (7) plan laying steel strand (9) will be formed in step 2, and reserve plastics cave mould (13) at anchor plate (6) lateral surface, and by service sleeve (1) other end mouth of pipe place plastics block (14) temporary plugging;
Step 4, builds the concrete of first constructing structure part (7), and builds integrally by service sleeve (1), fixation steel plate (3), anchor plate (6), plastics cave mould (13) and structural concrete;
Step 5, until after constructing structure part (8) start to construct time, open plastics block (14) and slow cohesion agent (11) be injected in service sleeve (1) with colloid-injecting gun, and the anchor plate mouth of bottom seals by interim adhesive waterproof tape;
Step 6, rejected by outer for the steel strand (9) in service sleeve length range sheath, and scene penetrates in service sleeve (1) after the agent of steel strand (9) surface smear slow cohesion; In advance anchor plate is installed rear constructing structure part (8) simultaneously, and reserved plastics cave mould (13);
Step 7, silica gel sealing bar is adopted to block closely in the gap of steel strand (9) below between end and anchor plate hole, service sleeve (1) and steel strand (9) interface adopt plastic protective glass holder (4) to be connected, and two ends adhesive waterproof tape (5) is by closely knit near service sleeve (1) mouth of pipe place parcel for the steel strand of plastic protective glass holder (4) and reservation sheath;
Step 8, builds the concrete of rear constructing structure part (8), after rear constructing structure part (8) concrete reaches design strength, installs tension ground tackle (12);
Step 9, carries out retarded adhesive prestressed stretch-draw to steel strand (9) are unified.
2. the retarded adhesive prestressed construction method being applicable to the stage construction of different structure position according to claim 1, it is characterized in that: described bar dowel (2) is interrupted spiral at service sleeve (1) external surface, the length of single bar dowel is 10cm, and diameter is 6mm.
3. the retarded adhesive prestressed construction method being applicable to the stage construction of different structure position according to claim 1, is characterized in that: described adhesive waterproof tape (5) parcel plastic protective glass holder (4) is no less than 3 layers, packages length >=5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433108.5A CN103526947B (en) | 2013-09-23 | 2013-09-23 | Slow-bonding prestress construction method suitable for staged construction of different structural parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433108.5A CN103526947B (en) | 2013-09-23 | 2013-09-23 | Slow-bonding prestress construction method suitable for staged construction of different structural parts |
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| Publication Number | Publication Date |
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| CN103526947A CN103526947A (en) | 2014-01-22 |
| CN103526947B true CN103526947B (en) | 2015-08-05 |
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| CN201310433108.5A Expired - Fee Related CN103526947B (en) | 2013-09-23 | 2013-09-23 | Slow-bonding prestress construction method suitable for staged construction of different structural parts |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703190A (en) * | 2017-02-28 | 2017-05-24 | 中国建筑股份有限公司 | Prefabricating beam column joint structure containing prestressing pore path and construction method thereof |
| CN108824175A (en) * | 2018-08-22 | 2018-11-16 | 中铁二院工程集团有限责任公司 | The retarded adhesive prestressed precast pier of suspension type monorail of the Y type with flanged joint |
| CN110184913B (en) * | 2019-06-04 | 2024-07-16 | 中铁第四勘察设计院集团有限公司 | Slow bonding welding nail, steel-concrete composite beam and forming method thereof |
| CN110258928B (en) * | 2019-06-26 | 2021-10-15 | 中国长江三峡集团有限公司 | Installation method of nut column prestressed reinforcement device |
| CN112647706A (en) * | 2020-07-28 | 2021-04-13 | 安宜建设集团有限公司 | Construction method for long-span concrete beam slow-bonding prestress |
| CN112900882B (en) * | 2021-01-22 | 2022-10-18 | 中国建筑第八工程局有限公司 | Construction method of slow-bonding prestressed tendon penetrating through post-pouring area |
| CN113789898B (en) * | 2021-09-28 | 2022-11-11 | 中能建西北城市建设有限公司 | Construction method of large-span slow-bonding prestressed floor slab |
| CN114016614A (en) * | 2021-11-18 | 2022-02-08 | 苏州若尧五金实业有限公司 | Assembly type building component and using method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339125C2 (en) * | 1983-10-28 | 1987-10-15 | Philipp Holzmann Ag, 6000 Frankfurt, De | |
| CN2211465Y (en) * | 1994-04-08 | 1995-11-01 | 铁道部第一勘测设计院 | Slow coagulating prestressed concrete component |
| CN201128973Y (en) * | 2007-11-13 | 2008-10-08 | 天津市鑫坤泰银桥预应力商贸有限公司 | Retard-bonded prestressed wire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3815641B2 (en) * | 1998-11-13 | 2006-08-30 | 東日本旅客鉄道株式会社 | After bond method |
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2013
- 2013-09-23 CN CN201310433108.5A patent/CN103526947B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339125C2 (en) * | 1983-10-28 | 1987-10-15 | Philipp Holzmann Ag, 6000 Frankfurt, De | |
| CN2211465Y (en) * | 1994-04-08 | 1995-11-01 | 铁道部第一勘测设计院 | Slow coagulating prestressed concrete component |
| CN201128973Y (en) * | 2007-11-13 | 2008-10-08 | 天津市鑫坤泰银桥预应力商贸有限公司 | Retard-bonded prestressed wire |
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| CN103526947A (en) | 2014-01-22 |
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