CN105369729A - External prestressing corrugated steel web T-shaped beam and construction method - Google Patents
External prestressing corrugated steel web T-shaped beam and construction method Download PDFInfo
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- CN105369729A CN105369729A CN201510912118.6A CN201510912118A CN105369729A CN 105369729 A CN105369729 A CN 105369729A CN 201510912118 A CN201510912118 A CN 201510912118A CN 105369729 A CN105369729 A CN 105369729A
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- external prestressing
- wavelike steel
- steel webplate
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
Abstract
The invention discloses an external prestressing corrugated steel web T-shaped beam and a construction method. The T-shaped beam comprises a concrete top plate, a concrete bottom plate, end cross beams, a corrugated steel web, shear connectors and external prestressing cables. The concrete top plate and the concrete bottom plate are connected with the corrugated steel web through the shear connectors to form a T-shaped beam section. The end cross beams are arranged at the two ends of the T-shaped beam and connected with the concrete top plate, the concrete bottom plate and the corrugated steel web. The external prestressing cables are steered at the break angle through steering devices and anchored to the end cross beams. The external prestressing corrugated steel web T-shaped beam has the advantages of stress performance, the material utilization rate and durability of a common corrugated steel web T-shaped beam, structural stress is optimized, the member structure is simplified, the amount of adopted prestressed reinforcement is reduced, and manufacturing cost is reduced; the problems that during internal prestressing construction, stretch-draw porous channels are blocked, and grouting is not compact after stretching and drawing are carried out are solved, the construction quality is ensured, and the bridge structure can be maintained and reinforced easily during the later stage.
Description
Technical field
The invention belongs to the bridge technology field of highway and railway, what relate generally to is a kind of external prestressing Wavelike steel webplate T beam and construction method.
Background technology
Wavelike steel webplate PC T beam structure is a kind of novel steel-concrete combined structure, by coughing up, steel, concrete bi-material are combined, make full use of the feature that concrete crushing strength is high, corrugated sheet steel shear strength is high, improve the service efficiency of bi-material, and alleviate dead load, decrease the construction sequence that web makes template, assembling reinforcement, concreting, reduce construction costs, avoiding Web cracks disease, is a kind of economy, reasonable, practical form of structure.
Present stage, web has been had to adopt Wavelike steel webplate construction pre-stress concrete T-shaped beam.As Chinese patent (ZL201420647729.3) disclosed " a kind of Wavelike steel webplate PC T beam structure ", this Wavelike steel webplate PC T beam structure is compared with common PC T beam, Wavelike steel webplate combination T girder construction decreases the working procedures such as web reinforcement colligation, concreting, accelerates construction speed; Wavelike steel webplate batch production is processed, and ensure that construction quality; Dead load is light, reduces the tonnage demand to hanging device, improves anti-seismic performance; Also have handsome in appearance, stress performance rationally, the advantage such as energy-conserving and environment-protective, economic performance be good.Therefore, Wavelike steel webplate combination T beam will become one of bridge construction of most competitiveness.But existing Wavelike steel webplate combination T beam adopts prestressing with bond reinforcing bar, finds still to have the following disadvantages in construction with in using:
1. adopt prestressing with bond reinforcement placement mode, by bellows pre-buried in shape of a hoof concrete block at the bottom of beam, reserved prestressed reinforcement pipeline, in construction, often occur that pipeline plug-hole, mud jacking leakiness etc. affect the quality problems of structure durability, result in many prestressed concrete continuous beam degree of prestressing not enough, beam body occurs to continue the problems such as downwarp, and carries out reinforcing difficulty after there is disease greatly, becomes a kind of potential safety hazard.
2. Wavelike steel webplate combination T beam prestressing with bond reinforcing bar can only to be arranged in bottom beam rib in shape of a hoof concrete, Wavelike steel webplate shear connector, intensive reinforcing bar and prestressed reinforcement pipeline is furnished with in shape of a hoof concrete block, often there is the uncompacted situation of concreting, affect structural safety.
3. according to structure stress, prestressing force configuration shape should adapt with the moment of flexure under beam External Force Acting, but Wavelike steel webplate T beam prestressing with bond reinforcing bar can only be configured in horseshoe type concrete block at the bottom of beam, more than neutral axis of the beam cannot be bent up in beam end, therefore, the configuration of prestressing with bond reinforcing bar is unreasonable, and causing prestressed reinforcement can not effectively utilize.Pressure is concentrated and is acted on shape of a hoof concrete block by prestressed reinforcement, makes this part stress too concentrated, is unfavorable for that structural entity is stressed.
Summary of the invention
The object of the invention is the deficiency existed for prestressing with bond concrete T-shaped beam, a kind of external prestressing Wavelike steel webplate T beam and construction method are proposed, on the basis of common Wavelike steel webplate structure, by arranging external prestressing, it is made both to have had common Wavelike steel webplate T girder construction advantage in stress performance, stock utilization, construction safety, economic benefit, durability etc., effectively can overcome again the problem that above-mentioned precast concrete T-beam runs into, optimize structure stress, simplify component structure, decrease the consumption of prestressed reinforcement, reduce cost; The problems such as the stretch-draw duct avoided in prestressing with bond work progress blocks, stretch-draw post jacking is unreal, reduce difficulty of construction, ensure that construction quality, accelerate construction speed; And be easy to the maintenance and reinforcement of later stage to bridge construction.
It is as follows that the present invention realizes the technical scheme that above-mentioned purpose takes: a kind of external prestressing Wavelike steel webplate T beam, comprise concrete roof, concrete floor, end floor beam, Wavelike steel webplate and shear connector, described concrete roof and concrete floor are connected to form T beam section by shear connector and Wavelike steel webplate, described end floor beam is arranged on end, T beam two ends, respectively with concrete roof, concrete floor, Wavelike steel webplate connects, it is characterized in that: also comprise external prestressing tendon and transfer, described external prestressing tendon carries out knuckle place by transfer and turns to and be anchored on described end floor beam.
Transfer of the present invention comprises steering linkage member, the axis of rolling, scroll wheel, described steering linkage member is a bending U-shaped structure, be symmetrical arranged in the described Wavelike steel webplate left and right sides, and be embedded in T beam concrete floor or be connected with bottom flange steel plate; The described axis of rolling is supported on steering linkage member, and is connected with steering linkage member, and described scroll wheel is placed on the axis of rolling, limits its displacement by both sides steering linkage member; The described axis of rolling is by Wavelike steel webplate and be fixedly connected with Wavelike steel webplate.
Wavelike steel webplate of the present invention is two-sided connection with described top flange steel plate, bottom flange slab plate, and on described top flange steel plate, interval is connected with peg, and described bottom flange steel plate connects Double Opening steel plate.
End floor beam of the present invention and Wavelike steel webplate adopt edge of a wing shape open pore steel plate to be connected.
The present invention is at described end floor beam embedded set prestressed cable anchor device, and one end of described external prestressing tendon is fixed in this prestressed cable anchor device.
External prestressing tendon of the present invention comprises external prestressing reinforcing bar and oversheath thereof, and pours into anti-corrosion material between prestressed reinforcement and oversheath.
The present invention arranges diaphragm in described beam body midfeather, and described diaphragm is horseshoe-shaped structure, is provided with steering gear in the lower end of each diaphragm.
Steering gear of the present invention can be Integral steering device, also can be separate type steering gear.
One realizes above-mentioned external prestressing Wavelike steel webplate T beam construction method, comprises the following steps: first, the prefabricated Wavelike steel webplate prestressed T beam of factory or prefabricated place; Secondly, install transfer in beam rib both sides, external prestressing tendon is by transfer stretch-draw external prestressing tendon and be anchored in end floor beam; Then, T beam transportation be lifted in Bridge Pier, the concrete roof of adjacent two the T beams of direction across bridge and crossbeam are interconnected by splicing or part cast-in-situ concrete; Direction across bridge can be made up of multiple T beam, and adjustment concrete roof and crossbeam size, meet different bridge deck width; Finally, vertical bridge connects two across to multispan T beam to cast-in-situ concrete, forms continuous T structure.
When girder span is greater than 20m, diaphragm is set in the middle of beam, one place is set every 10m, prefabricated with beam body; The concrete roof of the adjacent two or more T beam of direction across bridge, diaphragm, crossbeam pass through bar connecting, build cast-in-situ concrete and are interconnected, meet the wide requirement of different bridge.
The present invention is on the basis of common Wavelike steel webplate structure, by arranging external prestressing, it is made both to have had common Wavelike steel webplate T girder construction advantage in stress performance, stock utilization, construction safety, economic benefit, durability etc., effectively can overcome again the problem that above-mentioned precast concrete T-beam runs into, at construction technology, later stage bridge maintenance, there is clear superiority simultaneously.There is following significant technique effect:
1.T girder construction form adopts Wavelike steel webplate combination, has given full play to the advantage of concrete and waveform Steel material, has reduced concrete use amount, and decrease Precast T-Beam deadweight, energy-conserving and environment-protective, economic performance is good, convenient construction and transport, is applicable to scale prefabricated.
The girder pre-stressed employing external prestressing tendon of 2.T, is easy to occurring after bridge Long-Time Service that disease carries out structural reinforcement, and effectively can ensures the reasonability that structural entity is stressed.
3. use transfer to achieve folding prestressed rolling to turn to, what reduce prestressed stretch-draw turns to friction loss, and device is simple, and cost is low, and successful.
4. can adjust prestressed reinforcement configuration shape according to structure stress, optimize structure stress, decrease the consumption of prestressed reinforcement, reduce construction costs.
5. prestressing with bond reinforcing bar is separated from shape of a hoof concrete block at the bottom of the beam of Wavelike steel webplate T beam, the problems such as the stretch-draw duct avoided in work progress in prestressing with bond work progress blocks, stretch-draw post jacking is unreal, reduce difficulty of construction, ensure that construction quality, accelerate construction speed.
Accompanying drawing explanation
Fig. 1 is that T beam of the present invention indulges bridge to cross-sectional view.
Fig. 2 is T beam top view of the present invention.
Fig. 3 is T beam cross-sectional configuration schematic diagram of the present invention.
Fig. 4 is steering linkage member U-shaped bar construction schematic diagram of the present invention.
Fig. 5 is that end floor beam of the present invention is connected vertical structure schematic diagram with corrugated steel web.
Fig. 6 is the top view of Fig. 4.
Fig. 7 is longitudinal schematic diagram that T beam of the present invention arranges diaphragm.
Fig. 8 is the longitudinal schematic diagram of steel bundle steering gear in diaphragm of the present invention.
In figure: 1-top flange steel plate, 2-Wavelike steel webplate, 3-bottom flange steel plate, 4-end floor beam, 5-1-concrete roof, 5-2-concrete floor, 6-external prestressing tendon, 7-steering linkage member, 8-axis of rolling, 9-scroll wheel, 10-peg, 11-Double Opening steel plate, 12-prestressed cable anchor device, 13-diaphragm, 14-steering gear.14a-interior pipe, 14b-outer tube, 15-transfer, 16-edge of a wing shape open pore steel plate.
Detailed description of the invention
By reference to the accompanying drawings, provide embodiments of the invention as follows, but the present invention does not limit to following examples.
As Figure 1-3, external prestressing Wavelike steel webplate combination T beam described in the present embodiment, described T beam is prefabricated T-shaped section beam, comprises concrete roof 5-1, concrete floor 5-2, end floor beam 4, Wavelike steel webplate 2, external prestressing tendon 6 and transfer 15.Described concrete roof 5-1 and concrete floor 5-2 is connected to the two ends of Wavelike steel webplate 2 respectively by shear connector, forms T-shaped section beam.Wherein: the shear connector of the opposing horizontal shear that concrete roof 5-1 lower edge is arranged comprises top flange steel plate 1 and peg 10; The shear connector that concrete floor 5-2 upper limb is arranged comprises bottom flange steel plate 3 and Double Opening steel plate 11.Described Wavelike steel webplate 2 adopts double welded joint to be welded to connect with described top flange steel plate 1, and the peg 10 along the distribution of case beam longitudinal separation is welded to connect with described top flange steel plate 1; Described Wavelike steel webplate 2 adopts double welded joint to be welded to connect with described bottom flange slab plate 3, and the Double Opening steel plate 11 of opposing horizontal shear and transverse bending moment is connected with bottom flange steel plate 3.
Described end floor beam 4 is arranged on end, T beam two ends, be connected with concrete roof 5-1, concrete floor 5-2 and Wavelike steel webplate 2 respectively, with the connected mode of Wavelike steel webplate 2 for adopt edge of a wing shape open pore steel plate 16 to be connected, namely edge of a wing shape open pore steel plate (as shown in Figure 5, Figure 6) is set on end floor beam 4.External prestressing tendon 6 passes end floor beam by the built-in pipe be embedded in end floor beam 4, and is anchored on end floor beam, and the magnitude setting of external prestressing tendon 6 is determined according to structure stress, can be one or more.In end floor beam 4, also embedding prestressed cable anchor device 12(is as shown in Figure 7), what prestressed cable anchor device 12 adopted is known products.One end of external prestressing tendon 6 is fixed in prestressed cable anchor device 12.Described external prestressing tendon 6 comprises external prestressing reinforcing bar and oversheath thereof, and prestressed reinforcement adopts epoxy spraying or zinc-plated process, and oversheath adopts high density polyethylene pipe or steel pipe.And as required, anti-corrosion material can be poured between prestressed reinforcement and oversheath.External prestressing tendon 6 carries out knuckle place by transfer 15 and turns to, and is anchored on end floor beam by prestressed cable.According to structure stress, configuration and the beam bending moment diagram of prestressed cable line style should coincide, and therefore external prestressing at beam-ends setting position is: be arranged on back portion at beam-ends, be arranged on bottom beam at span centre, and external prestressing can only realize this configuration by transfer.Described transfer 15 comprises steering linkage member 7, the axis of rolling 8 and scroll wheel 9.Steering linkage member 7 is one and bends to U-shaped reinforcing bar (as shown in Figure 4) shape steel web, and be welded and fixed with Wavelike steel webplate, the axis of rolling 8 two ends are fixed (welding) and are connected with the top of steering linkage member 7, the axis of rolling 8 overlaps have and wear 6 scroll wheels 9 crossed for external prestressing tendon, limit its displacement by the U-shaped reinforcing bar steering linkage member 7 in both sides., be symmetrical arranged in the described Wavelike steel webplate left and right sides, be embedded in T beam concrete floor 5, or be connected with bottom flange steel plate 3 fixing (welding), steering linkage member 7 need arrange two at a turning point, is arranged on the web left and right sides.The described axis of rolling 8 is supported on steering linkage member 7, and namely the axis of rolling is through ripple
As shown in Figure 8: when Wavelike steel webplate combination T girder span footpath is larger, general girder span of working as is greater than 20m, need arrange diaphragm 13 in beam midfeather, to strengthen lateral rigidity and the stability of T beam, strengthen combination T beam transverse integral performance.Diaphragm 13 generally arranges a place every 10m.Diaphragm is reinforced concrete structure, and during construction, diaphragm reinforcing bar is together with roof and floor reinforcing bar binding, prefabricated with beam body.The upper flange 5-1 of the adjacent two or more T beam of direction across bridge, diaphragm 13, crossbeam pass through bar connecting, build cast-in-situ concrete and are interconnected, with the wide requirement of satisfied different bridge.Described diaphragm 13 is horseshoe-shaped structure, and being provided with steering gear 14(steering gear in the shape of a hoof lower end of each diaphragm 13 is known products).Described steering gear 14 comprises interior pipe 14a and outer tube 14b; interior pipe 14a is HDPE pipe; outer tube 14b is steel pipe; interior pipe 14a is socketed in outer tube 14b; steering gear end is horn mouth; object is external prestressing tendon when passing steering gear, and the topping of external prestressing tendon can not be swiped because of the vibrations of structure and steel steering gear, destroys topping.External prestressing tendon is by steering gear, and cable body contacts with pipe interior face, and both do not fix.Steering gear 14 can be designed as Integral steering device, also can be designed as separate type steering gear, and separate type steering gear is by the prestressing tendon of prestressed cable separately, is each passed through steering gear.
The Specific construction step of above-mentioned external prestressing Wavelike steel webplate T beam construction method is as follows:
First, the prefabricated Wavelike steel webplate prestressed T beam of factory or prefabricated place.Precasting Pedestal Construction is complete, mounting base template, colligation baseplate reinforcing bar, is welded as a whole Wavelike steel webplate 2 and top flange steel plate 1, peg 10 and bottom flange steel plate 3, Double Opening steel plate 11 in factory, puts smooth by Wavelike steel webplate structure, install flange template, colligation, colligation roof steel bar, pre-buried transfer steering linkage member 7, build upper plate and lower shoe concrete, and maintenance.
Secondly, in beam rib both sides, transfer is installed, namely steering linkage member 7 is symmetrical arranged in the Wavelike steel webplate left and right sides, be embedded in T beam concrete floor, or be connected with bottom flange steel plate 3 fixing (welding), scroll wheel 9 is installed on roller shaft 8, roller shaft 8 is welded on steering linkage member 7 and Wavelike steel webplate 2.Install external prestressing tendon by transfer, stretch-draw external prestressing tendon 6 is also anchored in end floor beam 4.
Then, T beam transportation be lifted in Bridge Pier, the concrete roof of adjacent two the T beams of direction across bridge, diaphragm and crossbeam are interconnected by splicing or part cast-in-situ concrete; Direction across bridge can be made up of multiple T beam, and adjustment concrete roof, diaphragm and crossbeam size, meet different bridge deck width.
Finally, vertical bridge connects two across to multispan T beam to cast-in-situ concrete, forms continuous T structure.
The construction method of diaphragm of the present invention is constructed the same with widely used assembling small box girder, Diaphragm of Fabricated T-beam Bridges.Do not repeat them here.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (10)
1. an external prestressing Wavelike steel webplate T beam, comprise concrete roof (5-1), concrete floor (5-2), end floor beam (4), Wavelike steel webplate (2) and shear connector, described concrete roof and concrete floor are connected to form T beam section by shear connector and Wavelike steel webplate, described end floor beam is arranged on end, T beam two ends, respectively with concrete roof, concrete floor, Wavelike steel webplate connects, it is characterized in that: also comprise external prestressing tendon (6) and transfer (15), described external prestressing tendon carries out knuckle place by transfer and turns to and be anchored on described end floor beam (4).
2. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: described transfer (15) comprises steering linkage member (7), the axis of rolling (8), scroll wheel (9), described steering linkage member is a bending U-shaped structure, be symmetrical arranged in the described Wavelike steel webplate left and right sides, and be embedded in T beam concrete floor or be connected with bottom flange steel plate (3); The described axis of rolling is supported on steering linkage member, and is connected with steering linkage member, and described scroll wheel is placed on the axis of rolling, limits its displacement by both sides steering linkage member; The described axis of rolling is by Wavelike steel webplate and be fixedly connected with Wavelike steel webplate.
3. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: described Wavelike steel webplate (2) is connected for two-sided with described top flange steel plate (1), bottom flange slab plate (3), peg (10) is connected with, at described bottom flange steel plate (3) upper connection Double Opening steel plate (11) at the upper interval of described top flange steel plate (1).
4. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, is characterized in that: described end floor beam (4) and Wavelike steel webplate (2) adopt edge of a wing shape open pore steel plate to be connected.
5. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: at described end floor beam (4) embedded set prestressed cable anchor device (12), one end of described external prestressing tendon (6) is fixed in this prestressed cable anchor device.
6. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, is characterized in that: described external prestressing tendon (6) comprises external prestressing reinforcing bar and oversheath thereof, and pours into anti-corrosion material between prestressed reinforcement and oversheath.
7. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: in described beam body midfeather, diaphragm (13) is set, described diaphragm is horseshoe-shaped structure, is provided with steering gear (14) in the lower end of each diaphragm.
8. a kind of external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: described steering gear (14) can be Integral steering device, also can be separate type steering gear.
9. realize a construction method for external prestressing Wavelike steel webplate T beam according to claim 1, it is characterized in that: comprise the following steps: first, the prefabricated Wavelike steel webplate prestressed T beam of factory or prefabricated place; Secondly, install transfer (15) in beam rib both sides, external prestressing tendon (6) is by transfer stretch-draw external prestressing tendon (6) and be anchored in end floor beam (4); Then, T beam transportation be lifted in Bridge Pier, the concrete roof (5-1) of adjacent two the T beams of direction across bridge and crossbeam are interconnected by splicing or part cast-in-situ concrete; Direction across bridge can be made up of multiple T beam, and adjustment concrete roof and crossbeam size, meet different bridge deck width; Finally, vertical bridge connects two across to multispan T beam to cast-in-situ concrete, forms continuous T structure.
10. external prestressing Wavelike steel webplate T beam construction method according to claim 9, is characterized in that: when girder span is greater than 20m, arranges diaphragm (13), arrange a place every 10m in the middle of beam, prefabricated with beam body; The concrete roof (5-1) of the adjacent two or more T beam of direction across bridge, diaphragm (13), crossbeam pass through bar connecting, build cast-in-situ concrete and are interconnected, meet the wide requirement of different bridge.
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Cited By (15)
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| CN105735127A (en) * | 2016-04-07 | 2016-07-06 | 华北水利水电大学 | Segment transverse unbonded prestressing assembly type precast hollow slab bridge structure and construction process thereof |
| CN105926468A (en) * | 2016-04-29 | 2016-09-07 | 长安大学 | External prestressing reinforcing structure and method for T-shaped concrete beam |
| CN106087711A (en) * | 2016-08-09 | 2016-11-09 | 湖南联智桥隧技术有限公司 | Antinode work beam-steel concrete top board-external prestressing combines T-shaped simply supported beam |
| CN106437192A (en) * | 2016-10-21 | 2017-02-22 | 江苏东南特种技术工程有限公司 | Method for carrying out reinforcing through prestress pulling cables on board |
| CN106638324A (en) * | 2016-12-30 | 2017-05-10 | 河南省交通规划设计研究院股份有限公司 | Construction method for ultra-high-performance concrete corrugated steel web composite box girder bridge |
| CN107142830A (en) * | 2017-07-14 | 2017-09-08 | 山东交通学院 | Steel pipe web prestressing force steel reinforced concrete combines main beam structure and construction method |
| CN107419826A (en) * | 2017-06-12 | 2017-12-01 | 河南奥斯派克科技有限公司 | Antinode plate and double-C-shaped steel composite structural member shear wall |
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| CN108560392A (en) * | 2018-03-22 | 2018-09-21 | 中交高新科技产业发展有限公司 | With prestressed setback type web combination beam |
| CN109162480A (en) * | 2018-10-25 | 2019-01-08 | 山东省建筑科学研究院 | Tensioning external prestressing strengthening device and reinforcement means in the middle part of a kind of T plate |
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| CN111236075A (en) * | 2020-01-21 | 2020-06-05 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
| CN112726956A (en) * | 2020-12-30 | 2021-04-30 | 深圳市市政设计研究院有限公司 | Prestressed corrugated steel web-concrete composite beam and construction method thereof |
| CN114150565A (en) * | 2021-12-20 | 2022-03-08 | 中铁二院工程集团有限责任公司 | Simplified design method for steering structure of external prestressed concrete box girder |
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| CN111236075A (en) * | 2020-01-21 | 2020-06-05 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
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| CN112726956A (en) * | 2020-12-30 | 2021-04-30 | 深圳市市政设计研究院有限公司 | Prestressed corrugated steel web-concrete composite beam and construction method thereof |
| CN112726956B (en) * | 2020-12-30 | 2022-04-12 | 深圳市市政设计研究院有限公司 | Prestressed corrugated steel web-concrete composite beam and construction method thereof |
| CN114150565A (en) * | 2021-12-20 | 2022-03-08 | 中铁二院工程集团有限责任公司 | Simplified design method for steering structure of external prestressed concrete box girder |
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