CN1272512C - Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof - Google Patents
Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof Download PDFInfo
- Publication number
- CN1272512C CN1272512C CN 03134925 CN03134925A CN1272512C CN 1272512 C CN1272512 C CN 1272512C CN 03134925 CN03134925 CN 03134925 CN 03134925 A CN03134925 A CN 03134925A CN 1272512 C CN1272512 C CN 1272512C
- Authority
- CN
- China
- Prior art keywords
- reinforcing steel
- presstressed reinforcing
- pull bar
- prestressed concrete
- force
- 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
Links
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010276 construction Methods 0.000 title abstract description 13
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 61
- 239000004567 concrete Substances 0.000 claims description 29
- 238000004080 punching Methods 0.000 claims description 25
- 238000004873 anchoring Methods 0.000 claims description 19
- 238000005516 engineering process Methods 0.000 claims description 18
- 238000005452 bending Methods 0.000 claims description 15
- 210000003205 muscle Anatomy 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 210000002435 tendon Anatomy 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000018992 Prunus glandulosa Nutrition 0.000 description 1
- 240000001619 Prunus glandulosa Species 0.000 description 1
- 235000013999 Prunus japonica Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The present invention provides a pretensioning polyline prestressed concrete member produced by a mixed-tensioning process and a construction method thereof, which relate to a prestressed concrete structure and a construction method thereof. The member of the present invention has the structure that a polyline-shaped tendon 1 is arranged in an ordinary reinforced concrete 2. The polyline-shaped tendon 1 is formed by a longitudinal tensioning process firstly and then by a transverse tensioning process. Compared with a prestressed member adopting a straight reinforcing bar along the member at present, the pretensioning polyline prestressed concrete member produced by a mixed-tensioning process has superior working performance. Compared with a prestressed concrete member produced by a posttensioning method, the pretensioning polyline prestressed concrete member produced by a mixed-tensioning process has the higher reliability and more convenient calculation and saves a large quantity of anchor devices. In the process of construction, the mixed-tensioning process does not need a large tonnage jack and has the advantages of simple operation process and high safety. When adopting the present invention, the prestressed concrete structure with moderate and large spans can save a large quantity of anchor devices. The present invention has obvious economic benefit.
Description
One, technical field
The present invention relates to prestressed reinforced concrete construction and construction of prestressed concrete structure method.
Two, background technology
Along with the application and the development of reinforced-concrete structure, prestressing technique constantly improves and has obtained promoting rapidly.Apply technology according to different prestressing force, prestressed structure can be divided into two kinds of pretensioning prestressed concrete struc and post tensioning structures.
It is very big that the design calculation theory of prestressed structure is influenced by prestressed concrete applying method and structure construction form.Total says, and in prestressed structure, if can guarantee bonding good between prestressing tendon muscle and the concrete, then the performance of structure can be guaranteed reliably.Yet in post-stressed member,, greatly reduce the DESIGN RELIABILITY of post-tensioned structure owing to inevitable reason such as defective in the error of duct location, inexactness that the duct frictional resistance calculates and the duct grouting process; Simultaneously, also, increased engineering cost widely because post-stressed member will use a large amount of expensive prestressed anchors.So in engineering practice, under the condition that can adopt the pre-tensioning system construction, general equal first-selected pretensioned prestressing member.Therefore, the pretensioned prestressing member has obtained using widely medium and small striding in the bridge construction of footpath at present.
In the present pre-tensioning system practice, presstressed reinforcing steel in the member is commonly the line beam muscle, be difficult to lay the bundle muscle so that the prestressing force in the member can both mate preferably with corresponding load effect thereby can not resemble the shearing resistance effect that the post stretching member can utilize the section of bending up presstressed reinforcing steel on the different cross section of member, cause the fourth stock utilization relatively low like this according to the actual moment envelope of member.
So the mode of utilization broken line cloth bundle is favourable beyond doubt for structure stress in prestressed structure.
" prestressed reinforced concrete construction design " (Lin Tongyan, NED H.BURNS work Lu Zhanqin, yellow Chinese bush cherry, Ma Yumei translate China Railway Press into nineteen eighty-three) introduced a kind of broken line steel bar structure, yet in this structure, presstressed reinforcing steel can only bend in same position, thereby it is consistent as far as possible with moment envelope to accomplish that a power muscle repeatedly bends.In addition, its construction technology is Y stretch-draw, and tension tonnage is big, the equipment needed thereby heaviness.
Be 95111489.1 at number of patent application, publication number is in 1127824 the patent application, to disclose a kind of " method for construction of transverse tension prestress concrete beam "; Be 96101544.6 at number of patent application, publication number is in 1127824 the patent application, to disclose a kind of " producing horizontal prestressed composite beam job practices "; Be 98245987.2 at number of patent application, publication number is in 2350429 the patent application, to disclose a kind of " transverse tension prestress concrete hollow slab bridge ".All adopted horizontal technology in these patent applications, existed:
(1) during the transverse tension prestress structure manufacture in the described patent application, need to reserve open channel, behind the transverse stretching presstressed reinforcing steel, fluid concrete sealing open channel again, concrete pouring finish for twice and the concrete of back cast in do not have prestressing force;
(2) in the described patent application during transverse tension prestress structure manufacture, need the fixedly facilities such as interim latch of presstressed reinforcing steel, after member formed, they can become the part of member, and often there is the stress concentration phenomenon in these places;
(3) in the described patent application transverse tension prestress member when the height of beam body hour because no vertical stretch-draw, when only adopting horizontal, stretch-draw length perseverance is the length difference of broken line and straight line, might not reach required weak points such as degree of prestressing.
Three, summary of the invention
Based on above-mentioned situation, the present invention proposes a kind of pre-tensioned prestressed concrete member of in the pre-tensioning system construction, realizing broken line shape arrangement of reinforcement, lay the power muscle according to moment envelope as best one can with this implementation structure, reach the purpose that improves component performance, economical with materials.Simultaneously, adapt, proposed the elder generation that mixing tension technology that vertical stretch-draw and transverse stretching combine makes and opened folding prestressed concrete component and job practices with broken line cloth muscle.
Folding prestressed concrete component is opened by the elder generation that the mixing tension technology that the present invention proposes is made, save ground tackle, can finish except having common pre-tensioning system in precast yard, outside the advantage of producing in enormous quantities, presstressed reinforcing steel in the member can bend in different positions, same presstressed reinforcing steel can repeatedly bend, can realize the identical substantially of prestress reinforcement and member moment envelope, the member antiarch is reduced, it is long-term stressed stressed with the structure of upper part with member to be beneficial to member; The presstressed reinforcing steel that bends up can be brought into play the shearing resistance effect, can improve the member shear behavior, saves shear reinforcement quantity.
Concrete of the present invention is as a whole, the concrete once-cast, remove prestressed constraint after, concrete each part all has prestressing force.
The present invention can come degree of prestressing is adjusted by vertical stretch-draw, can adapt to different deck-moldings.
Presstressed reinforcing steel anchoring of the present invention is carried out anchoring by stressed between concrete integral body and the presstressed reinforcing steel, does not set up other any interim or permanent facilitys in inside configuration.
The present invention has utilized stretching bed seat and vertical force application apparatus, not only can transverse stretching and vertically stretch-draw, and the compliance of degree of prestressing is stronger.
The present invention is achieved through the following technical solutions: folding prestressed concrete component is opened by the elder generation that mixing tension technology is made, include the ordinary reinforced concrete of plain bars net, be installed with presstressed reinforcing steel between the plain bars net in its ordinary reinforced concrete, the main beam bending part A of the presstressed reinforcing steel of the vertical stretch-draw of process is connected with vertical application of force pull bar upper end.
The present invention, the broken line B place of the beam splitting of presstressed reinforcing steel is connected with vertical application of force pull bar upper end.
The present invention, presstressed reinforcing steel has the 2-30 root.
The present invention, vertical application of force pull bar has the 2-16 root.
Folding prestressed concrete component job practices is opened by the elder generation that mixing tension technology is made, and it is characterized in that job practices comprises following steps:
A, carry out Force Calculation according to the actual operating conditions of concrete component and working load etc., obtain the moment envelope and the scissors envelope of concrete component, determine the quantity of presstressed reinforcing steel, the quantity of bending position and plain bars, structural form, concrete label, determine the position and the structure of precasting yard stretching bed seat and prefabricated board slot, be provided with vertical force application apparatus in bottom, prefabricated board slot lower prestress muscle bending position, device has the punching jack of vertical application of force pull bar in the basis of the crossbeam under the soffit formwork of prefabricated board slot, the hole of crossbeam and soffit formwork is passed in vertical application of force pull bar upper end, and wall device has the punching jack outside two stretching bed seats;
Be installed with presstressed reinforcing steel between the plain bars that colligation is good in b, the prefabricated board slot, the reservation on the stretching bed seat is passed at the presstressed reinforcing steel two ends, with the ground tackle linkage behind the piston elongation device of the punching jack on the stretching bed seat, start oil pump systems, make punching jack pair presstressed reinforcing steel carry out Y stretch-draw, after arriving designing requirement, anchoring temporarily stops oil pump systems work on stretching bed seat;
C, be arranged on vertical application of force pull bar upper end below the crossbeam and connect ad-hoc location, lower end that the presstressed reinforcing steel main beam as calculated must bending and connect the piston elongation device of punching jack with snap ring after, start oil pump systems then, punching jack pair presstressed reinforcing steel main beam is pulled down, make presstressed reinforcing steel pull into broken line form, after reaching designing requirement, vertical application of force pull bar anchoring temporarily stops oil pump systems work on crossbeam;
After d, vertical application of force pull bar upper end connect ad-hoc location, lower end that presstressed reinforcing steel as calculated must bending and connect the piston elongation device of punching jack with snap ring, start oil pump systems then, punching jack pair presstressed reinforcing steel is pulled down, make presstressed reinforcing steel pull into broken line form, after reaching designing requirement, vertical application of force pull bar anchoring temporarily stops oil pump systems work on crossbeam;
E, in prefabricated board slot fluid concrete, when treating that concrete intensity reaches capacity intensity 70-80%, remove the anchoring temporarily of presstressed reinforcing steel and vertical application of force pull bar on stretching bed seat and the crossbeam respectively, and cut off presstressed reinforcing steel and vertical application of force pull bar part in the concrete component outside;
F, folding remove the precast plate slot template, and folding prestressed concrete component is opened by the elder generation that removes the mixing tension technology making with crane gear.
The present invention has following advantage:
(1) mix to open in the process, the required pulling force of twice stretch-draw is all not too large, does not therefore need the tensioning equipment of complex structure and structure heaviness, and operation is simple.
(2) stress in the presstressed reinforcing steel reaches design load finally by horizontal Zhang Shixian of second step, carries out because operate under the base plate this moment, can avoid the brittle failure generation human casualty accident of presstressed reinforcing steel, so the safety of stretch-draw increases greatly.
Four, description of drawings
Further specify the present invention with accompanying drawing below.
Accompanying drawing 1 is a concrete component sectional structure schematic diagram of the present invention;
Accompanying drawing 2 is Y tensioning process schematic diagrames of the present invention;
Accompanying drawing 3 is X tensioning process schematic diagrames of the present invention.
Among the figure: the vertical application of force pull bar of the vertical force application apparatus 5-of 1-presstressed reinforcing steel 2-ordinary reinforced concrete 3-stretching bed seat 4-crossbeam 6-punching jack 7-
Five, the specific embodiment
As shown in Figure 1, be installed with presstressed reinforcing steel 1 between the plain bars net in the ordinary reinforced concrete 2, the main beam bending part A of presstressed reinforcing steel 1, beam splitting bending part B are connected with vertical application of force pull bar 7 upper ends.
As Fig. 2, Fig. 3, before making member of the present invention, should be at first carry out Force Calculation according to the actual operating conditions of member and working load etc., obtain the moment envelope and the shearing envelope of member.Determine the quantity of presstressed reinforcing steel, the quantity that bends up position and plain bars, structural form according to moment envelope, shearing envelope and the prestressing force design theory of member then, and concrete label.
According to the overall dimension of member and the prestressing force size of design, at first set up the stretching bed seat 3 that satisfies scantling requirement and stability under loading requirement in precast yard; According to the quantity of the presstressed reinforcing steel of above design, bend up the stress in position and the presstressed reinforcing steel, the ad-hoc location under base plate is provided with the usefulness of vertical force application apparatus 4 as X stretch-draw.Vertical force application apparatus 4 is made up of the crossbeam 5, punching jack 6 and the vertical application of force pull bar 7 that are embedded under the bed die, vertical force application apparatus 4 should have enough spaces to hold above various piece, and should reserve certain operating space, the operations when satisfying following transverse stretching.Crossbeam 5 anchoring stably, middle part leave the hole that vertical application of force pull bar 7 can be passed through, and are provided with the anchoring temporarily facility, when treating that presstressed reinforcing steel 1 transverse stretching puts in place, and the vertical application of force pull bar 7 of anchoring temporarily.Punching jack 6 is made up of oil pump systems and piston elongation system, and it is supported on the crossbeam 5, with internal anchorage anchoring vertical application of force pull bar 7, spurs vertical application of force pull bar 7 to bottom offset by piston elongation system.The bottom of vertical application of force pull bar 7 is anchored in the punching jack 6, top is connected the position that bends up in prestressing force when design with snap ring, and vertical application of force pull bar 7 drives presstressed reinforcing steel and moves down when bottom offset, make rectilinear presstressed reinforcing steel bending, elongation, reach the purpose of stretch-draw.Punching jack 6 can be a fixed equipment, can be mobile device also, treat that vertical application of force pull bar 7 carries out anchoring temporarily after, can move to another vertical force application apparatus place presstressed reinforcing steel is carried out transverse stretching.
After stretching bed seat 3 and vertical force application apparatus 4 are finished, colligation plain bars on the bed die of member.Between the plain bars that colligation is good, wear prestressing tendon then, presstressed reinforcing steel 1 two ends of form of straight lines are anchored on the stretching bed seat 3 with ground tackle respectively, and carry out Y stretch-draw with 6 pairs of presstressed reinforcing steels of punching jack 1, the punching jack is supported on the stretching bed seat 3 during stretch-draw, and the tonnage of stretch-draw is determined according to calculating in advance.Carry out X stretch-draw by 4 pairs of presstressed reinforcing steels of force application apparatus 1 after vertically stretch-draw is finished: punching jack 6 is supported on the crossbeam 5, by the vertical application of force pull bar 7 of ground tackle anchoring, vertical application of force pull bar 7 tops are attached at the ad-hoc location of presstressed reinforcing steel 1 with snap ring, start punching jack 6, by vertical application of force pull bar 7 X tensioned prestressing bars 1, the presstressed reinforcing steel 1 that is anchored on the pedestal of both sides is pulled into broken line form downwards, and on crossbeam anchoring temporarily.
Mixing tension technology by above Y stretch-draw and X makes that presstressed reinforcing steel 1 reaches that design is linear, behind degree of prestressing and the position, fluid concrete, treat concrete intensity reach requirement after (be generally 70 of concrete strength～80% o'clock), anchoring temporarily on the releasing stretching bed seat 3 in presstressed reinforcing steel 1 and the vertical force application apparatus 4, and cut off presstressed reinforcing steel 1 and the part of vertical pull bar 7 in the member outside.Because the bonding between presstressed reinforcing steel 1 and the concrete makes broken line steel bar 1 realize permanent anchoring.Opening the broken line steel bar concrete component like this, has earlier just formed.
Folding prestressed concrete component is opened by the elder generation that removes the mixing tension technology making with crane gear, repeats aforesaid operations then, just can open folding prestressed concrete component earlier by prefabricated another.
Claims (5)
1, folding prestressed concrete component is opened by a kind of elder generation of mixing tension technology making, include the ordinary reinforced concrete (2) of plain bars net, it is characterized in that being installed with presstressed reinforcing steel (1) between the plain bars net in the ordinary reinforced concrete (2), the main beam bending part (A) of the presstressed reinforcing steel (1) of the vertical stretch-draw of process is connected with vertical application of force pull bar (7) upper end.
2, folding prestressed concrete component is opened by the elder generation of a kind of mixing tension technology making according to claim 1, it is characterized in that the beam splitting bending part (B) of presstressed reinforcing steel (1) is connected with vertical application of force pull bar (7) upper end.
3, folding prestressed concrete component is opened by the elder generation of a kind of mixing tension technology making according to claim 1, it is characterized in that presstressed reinforcing steel (1) has the 2-30 root.
4, folding prestressed concrete component is opened by the elder generation of a kind of mixing tension technology making according to claim 1, it is characterized in that vertical application of force pull bar (7) has the 2-16 root.
5, folding prestressed concrete component job practices is opened by a kind of elder generation of mixing tension technology making, it is characterized in that job practices comprises following steps:
A, carry out Force Calculation according to the actual operating conditions of concrete component and working load etc., obtain the moment envelope and the shearing envelope of concrete component, determine quantity, structural form, the concrete label of quantity, bending position and the plain bars of presstressed reinforcing steel (1), determine the position and the structure of precasting yard stretching bed seat (3) and prefabricated board slot, be provided with vertical force application apparatus (4) in bottom, prefabricated board slot lower prestress muscle (1) bending position; The below device of the crossbeam under the soffit formwork of prefabricated board slot (5) has the punching jack (6) of the vertical application of force pull bar of stretch-draw (7), the hole of crossbeam and soffit formwork is passed in vertical application of force pull bar (7) upper end, and wall device has punching jack (6) outside two stretching bed seats (3);
Be installed with presstressed reinforcing steel (1) between the plain bars that colligation is good in b, the prefabricated board slot, the hole of stretching bed seat (3) is passed at presstressed reinforcing steel (1) two ends, with the ground tackle linkage on the piston elongation device of the punching jack (6) on the stretching bed seat (3), start oil pump systems, make punching jack (6) carry out Y stretch-draw to presstressed reinforcing steel (1), after arriving designing requirement, anchoring temporarily stops oil pump systems work on stretching bed seat (3);
C, be arranged on vertical application of force pull bar (7) upper end below the crossbeam (5) and connect ad-hoc location, lower end that presstressed reinforcing steel (1) main beam as calculated must bending and connect the piston elongation device of punching jack (6) with snap ring after, start oil pump systems then, punching jack (6) is pulled down presstressed reinforcing steel (1) main beam, make presstressed reinforcing steel (1) pull into broken line form, after reaching designing requirement, vertical application of force pull bar (7) anchoring temporarily stops oil pump systems work on crossbeam (5);
The beam splitting that d, vertical application of force pull bar (7) upper end connect presstressed reinforcing steel (1) with snap ring as calculated must bending ad-hoc location, lower end connect the piston elongation device of punching jack (6) after, start oil pump systems then, punching jack (6) is pulled down the beam splitting of presstressed reinforcing steel (1), make presstressed reinforcing steel (1) beam splitting pull into broken line form, after reaching designing requirement, vertical application of force pull bar (7) anchoring temporarily stops oil pump systems work on crossbeam (5);
E, in prefabricated board slot fluid concrete, when treating that concrete intensity reaches capacity intensity 70-80%, remove stretching bed seat (3) and crossbeam (5) respectively and go up the anchoring temporarily of presstressed reinforcing steel (1) and vertical application of force pull bar (7), and cut off presstressed reinforcing steel (1) and vertically application of force pull bar (7) in the part of concrete component outside;
F, dismounting precast plate slot template, folding prestressed concrete component is opened by the elder generation that removes the mixing tension technology making with crane gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134925 CN1272512C (en) | 2003-09-30 | 2003-09-30 | Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134925 CN1272512C (en) | 2003-09-30 | 2003-09-30 | Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1528991A CN1528991A (en) | 2004-09-15 |
| CN1272512C true CN1272512C (en) | 2006-08-30 |
Family
ID=34286216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134925 Expired - Fee Related CN1272512C (en) | 2003-09-30 | 2003-09-30 | Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1272512C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100547210C (en) * | 2007-11-21 | 2009-10-07 | 王用中 | Broken-line reinforcement prestressed concrete pre-tensioned girder construction process |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914993B (en) * | 2010-08-13 | 2012-07-04 | 赵正义 | Construction and method for reducing stress of prestressed steel before removing anchorage device |
| CN103395120B (en) * | 2013-08-02 | 2016-03-16 | 叶长青 | Large-span Precast roof boarding preparation method |
| CN105195574B (en) * | 2015-09-21 | 2017-04-12 | 江苏科技大学 | Cold-bending forming method for large-section-dimension component |
| CN107718268B (en) * | 2017-09-15 | 2023-04-18 | 柳州欧维姆机械股份有限公司 | Roller bending device for pre-tensioning broken line reinforcement and roller bending device with quick unhooking device |
| CN107575031B (en) * | 2017-09-21 | 2023-01-24 | 柳州欧维姆机械股份有限公司 | Pretensioning compensation device capable of unloading force and method for pretensioning broken line reinforcement construction |
| CN107571392B (en) * | 2017-09-27 | 2019-04-23 | 中建三局基础设施工程有限公司 | A kind of beam making bench for the construction of transverse tensioning method prestressing force prefabricated small box girder |
| CN109184077B (en) * | 2018-10-17 | 2023-05-09 | 中国铁路设计集团有限公司 | Steel reinforced concrete beam with prestressed lower anchor and construction method thereof |
| CN109333810B (en) * | 2018-10-22 | 2024-07-12 | 上海市政工程设计研究总院（集团）有限公司 | Pretensioned broken line prestressed tendon pull-down type bending device and operation method thereof |
| CN109571747B (en) * | 2018-11-23 | 2021-07-06 | 上海市政预制技术开发有限公司 | Construction method of broken line pretensioning prestressed double T-beam |
| CN111186019B (en) * | 2019-12-13 | 2022-05-03 | 西藏藏建科技股份有限公司 | Production process of prefabricated composite wallboard |
| CN114704099A (en) * | 2022-03-23 | 2022-07-05 | 保利长大工程有限公司 | Pre-tensioning method precast beam tensioning concrete counterforce wall |
-
2003
- 2003-09-30 CN CN 03134925 patent/CN1272512C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100547210C (en) * | 2007-11-21 | 2009-10-07 | 王用中 | Broken-line reinforcement prestressed concrete pre-tensioned girder construction process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1528991A (en) | 2004-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6915615B2 (en) | Prestressed composite truss girder and construction method of the same | |
| CN1272512C (en) | Mixed-tensioning process made pre-tensioning mansard prestressed concrete member and construction method thereof | |
| CN206090996U (en) | Connected node of whole thick precast floor plank unit of assembled and floor unit thereof | |
| CN110424240B (en) | Bidirectional prestress reinforcement-free combined beam based on slow-bonding prestress UHPC permanent template and construction method | |
| CN105835226A (en) | Precast beam pedestal obtained through pre-tensioning method | |
| CN114197753A (en) | UHPC (ultra high performance concrete) die shell type steel concrete composite cylinder-steel beam combined frame and construction method | |
| CN108678225A (en) | The built-in steel plate combined shear wall of built-in presstressed reinforcing steel steel pipe concrete frame and the practice | |
| CN111549658A (en) | Continuous bridge joint structure and continuous box girder bridge structure | |
| CN110409283B (en) | Rib-free prestressed self-maintenance composite beam based on slow-bonding prestressed UHPC permanent formwork and construction method | |
| CN110409282B (en) | Non-web-rib prestressed self-maintenance composite beam based on permanent post-tensioned prestressed UHPC (ultra high performance concrete) nested template and construction method | |
| CN110524675B (en) | Pre-tensioning prefabricated I-beam and construction method thereof | |
| CN211313026U (en) | Large-span prestressed cast-in-place concrete floor slab | |
| CN117188606A (en) | Prestressed assembled concrete beam column node and construction method thereof | |
| EP2749704A3 (en) | Ceiling element as semi-finished product and associated method of manufacture | |
| CN111910775A (en) | FRP-concrete combination beam shear connector | |
| CN110485631A (en) | There is the pretensioned prestressing precast beam of anchor head in a kind of end | |
| CN107142830B (en) | Steel pipe web prestress steel-concrete combined girder structure and construction method | |
| CN2644558Y (en) | Pre-tension broken line prestressing force concrete component made by mixing tension technology | |
| CN109571747B (en) | Construction method of broken line pretensioning prestressed double T-beam | |
| CN210561680U (en) | Pretensioned ultra-high performance concrete composite beam | |
| CN113585620A (en) | Prestressed double-web steel reinforced concrete beam | |
| CN111155713A (en) | Prefabricated superposed beam and construction method | |
| KR100580327B1 (en) | PSC beam with tensioned lower flange and construction method | |
| CN2647962Y (en) | Precast shear wall and its conbined structure | |
| CN217679222U (en) | A prestressing force cushion cap for pier restoration construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: YI ZHIJIAN LIU ZHANFANG Owner name: CHONGQING JIAOTONG UNIV. Free format text: FORMER OWNER: YANG QINGGUO Effective date: 20101217 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 400074 BRIDGE DEPARTMENT, CHONGQING JIAOTONG UNIVERSITY, NO. 66, XUEFU AVENUE, NAN AN DISTRICT, CHONGQING CITY TO: 400074 NO. 66, XUEFU AVENUE, NAN AN DISTRICT, CHONGQING CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101217 Address after: 400074 Chongqing Nan'an District University Avenue, No. 66 Patentee after: chongqing jiaotong university Address before: 400074 Department of bridge, Chongqing Jiaotong College, 66 school Avenue, Nan'an District, Chongqing Co-patentee before: Yi Zhijian Patentee before: Yang Qingguo Co-patentee before: Liu Zhanfang |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 Termination date: 20110930 |