CN104727226B - Construction method for steel-concrete composite girder - Google Patents
Construction method for steel-concrete composite girder Download PDFInfo
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- CN104727226B CN104727226B CN201510081269.1A CN201510081269A CN104727226B CN 104727226 B CN104727226 B CN 104727226B CN 201510081269 A CN201510081269 A CN 201510081269A CN 104727226 B CN104727226 B CN 104727226B
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- 239000004567 concrete Substances 0.000 title claims abstract description 198
- 238000010276 construction Methods 0.000 title claims abstract description 54
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- 239000010959 steel Substances 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 19
- 238000013461 design Methods 0.000 claims abstract description 8
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 239000000725 suspension Substances 0.000 abstract description 11
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Classifications
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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
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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
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method for a steel-concrete composite girder segment. The method comprises the steps that 1, the steel-concrete composite girder segment is manufactured in a factory; 2, a deck derrick crane is assembled on site to be in place and adjusted, meanwhile, the steel-concrete composite girder is transported to a construction site from the factory; 3, the steel-concrete composite girder segment is vertically prefabricated; 4, a hoisting operation is conducted on the steel-concrete composite girder; 5, a stiff skeleton is installed; the steel-concrete composite girder is fixed to built-in fittings on a suspension poured concrete box girder in a welded mode through structural steel; 6, closure segment construction is conducted; closure segment reinforced steel colligation, formwork installation, pre-stressed tendon installation and closure segment concrete pouring construction between the steel-concrete composite girder and the concrete box girder are conducted; 7, bridge girder pre-stress construction is conducted; when closure segment concrete reaches the design strength, steel-concrete composite girder pre-stress tensioning and mud jacking are conducted, and the deck derrick crane and steel-concrete composite girder constraints are removed. The construction method for the steel-concrete composite girder can not only guarantee the construction quality, but also can save the cost and shorten the construction period.
Description
Technical field:
The present invention relates to field of bridge construction, more particularly, to a kind of steel-concrete connecting beam section constructing method.
Background technology:
Steel-concrete hybrid beam can give full play to the bearing capacity of steel construction and concrete, weight difference changing the across footpath ratio of multispan bridge.Steel-concrete the adapter section of generally rigid frame bridge is located at main span about 1/3 beam section extension position, and three sections of girder steel (the two basic change section girder steel being combined with two ends beams of concrete, the big sections girder steel that centre is connected with two adapter section girder steels), adapter section girder steel and big sections girder steel are by the erection crane lifting being fixed on bridge floor.Adapter section girder steel is connected by stretching into the concrete in girder steel with beams of concrete, and adapter section girder steel to be connected by welding or bolting with big sections girder steel.
Generally big sections girder steel and the long line manufacture inside of adapter section girder steel, big sections girder steel is lifted again after adapter section steel beam lifting casting concrete, there is deviation in adapter section girder steel in hoisting process, and adapter section girder steel and big sections girder steel are because its special Joining Technology (welding or bolt) is it is desirable to two adapter section steel girder erection precision are especially high.
It is provided with much narrow and small box generally in adapter section girder steel using steel plate, the concrete in girder steel pours after adapter section steel beam lifting is in place in the original location, and concrete horizontal flowing, full of entirely box, is vibrated for laterally vibrating.When pouring girder steel inner concrete in the original location, concrete is difficult to dense packing effect to each narrow and small chamber of girder steel, concrete placings difficult quality guarantee under bottom horizontal flow sheet state, has a strong impact on the construction quality of toughened internal stress.
In sum it is necessary to provide a kind of construction method of steel-concrete connecting beam, to solve the installation accuracy of adapter section girder steel, the relative tertiary location of particularly two adapter section girder steels, and the problem of the construction quality of adapter section inner concrete.
Content of the invention:
The present invention is the adapter section concrete construction of steel-concrete connecting beam section and the integral installation of steel-concrete connecting beam section provides one kind safely and effectively method, can ensure that construction quality is stablized superior, construction cost, late maintaining cost can be saved again, and construction period can be shortened.
1st, a kind of construction method of steel-concrete connecting beam section is it is characterised in that comprise the following steps:
One) make in steel-concrete connecting beam section factory
Two) erection crane on-site consolidation in place, debugging, be meanwhile transported to job site in steel-concrete connecting beam section factory；
Three) steel-concrete connecting beam section concrete is vertically prefabricated
Steel-concrete connecting beam section is vertically placed, and carries out the reinforcing bar binding of steel-concrete connecting beam section, model sheetinstallat, the vertical pouring construction of concrete；
Four) steel-concrete connecting beam section lifting operation
Steel-concrete connecting beam section is transported to positioning under bridge by transporting equipment, using standing up hanger in steel-concrete connecting beam section, erection crane lifted steel-concrete connecting beam section in the air 90 degree stand up work, and again transfer to transporting equipment, suspender on erection crane is changed to reference on the lifting hanger in beam section, normal hoisting steel-concrete connecting beam section, to design height, completes the accurate adjustment of steel-concrete connecting beam section aerial statue by the three-dimensional regulating system of erection crane again；
Five) stiff skeleton is installed
With shaped steel, steel-concrete connecting beam section is welded and fixed with the built-in fitting on the concrete box girder of cantilever；
Six) closure segment construction
Closure segment reinforcing bar binding between steel-concrete connecting beam section and concrete box girder, installation form, prestressed muscle, pour closure segment concrete construction；
Seven) bridge prestress construction
Close up after section concrete reaches design strength, carry out steel-concrete connecting beam section prestressed stretch-draw, mud jacking, remove erection crane and constrain with steel-concrete connecting beam section.
In described step 3) in, vertically placed by the girder steel of factory process, and need casting concrete one end upward, steel-concrete connecting beam section concrete is vertical layered to be poured, vertical layered vibrate.
In described step 4) in, steel-concrete connecting beam Duan Shangyou specializes in the hanger standing up, normally lifting by crane, steel-concrete connecting beam section integrally complete in the air under the auxiliary of erection crane 90 degree stand up work, transfer to transporting equipment after steel-concrete connecting beam section air turning, steel-concrete connecting beam section normally lifts by crane the Special lifting lug used thereon, and erection crane three-dimensional regulating system completes the aerial statue accurate adjustment of steel-concrete connecting beam section.
The present invention has the advantages and positive effects that: using steel-concrete connecting beam section concrete is vertically prefabricated and concrete surface is higher than steel construction 50cm; the each narrow and small chamber that concrete is sufficiently filled in girder steel under Gravitative Loads can be ensured; vertical layered vibrating can ensure that the fully closely knit of concrete; the level of solving pours gas in concrete under state and cannot exclude the difficult problem leading to the gap that there is gas filling between concrete and steel room, is that steel-concrete connecting beam section concrete construction quality provides guarantee.Using erection crane, air turning is carried out to steel-concrete connecting beam section, the use of extra big machinery can be avoided, reduce construction cost.By the three-dimensional regulating system on erection crane, the spatial attitude of steel-concrete connecting beam section accurately can be adjusted, can ensure that big sections girder steel and two steel-concrete connecting beam sections accurate docks it is ensured that quality of finished bridge.
Brief description:
The present invention is further described below in conjunction with the accompanying drawings.
The schematic diagram that Fig. 1 applies for the present invention.
In figure: 1, steel-concrete connecting beam section, 2, erection crane, 3, transporting equipment, 4, cantilever box beam, 5, closure segment, 6, continuous jack, 7, steel strand wires, 8, hanger, 9, adjust oil cylinder
Figure
2 is construction technology main-process stream of the present invention
Specific embodiment:
For content of the invention, the feature level work efficiency of the present invention can be further appreciated that, hereby enumerate following examples, and it be as follows to coordinate accompanying drawing to describe in detail:
Refer to Fig. 1, a kind of steel-concrete connecting beam section construction technology, the technological process of this construction technology includes:
Steel-concrete connecting beam section making → erection crane is assembled, steel-concrete connecting beam section transport → steel-concrete connecting beam section vertically prefabricated → steel-concrete connecting beam section lifting → stiff skeleton installation → closure segment construction → bridge prestress constructs.
This construction technology comprises the following steps:
One) steel-concrete connecting beam section makes
Steel-concrete connecting beam section is entrusted professional steel construction producer according to design drawing processing, is made shaping, and arranges technical staff's supervision in field.
Two) erection crane assembly, the transport of steel-concrete connecting beam section
Erection crane is mainly made up of load-carrying members and lift system two parts.Load-carrying members adopt truss structure, and an erection crane is made up of two groups of completely identical in structure triangular truss structures and lateral ties truss.Every group of triangular truss is made up of some I-steel components, and all components pass through high-strength bolt and are connected in node.Lift system adopts continuous jack and synchronization lifting system.
According to geographical conditions, the transport of steel-concrete connecting beam section adopts water transport to bridge location.
Three) steel-concrete connecting beam section concrete is vertically prefabricated
For avoiding conventional construction method concrete to be difficult to dense packing effect under bottom horizontal flow sheet state to each narrow and small chamber of girder steel, the problem of concrete placings difficult quality guarantee, this engineering adopts the vertically prefabricated method of steel-concrete connecting beam section concrete.
Using the state of placing vertically during prefabricated steel-concrete connecting beam section, the end face being connected with steel box-girder is contacted with ground, concrete segment is above, carry out reinforcing bar binding, template support, concreting, during cast concrete, concrete can be filled into each corner of steel-concrete connecting beam section steel construction chamber automatically under gravity, and gas can vertically be excluded in concrete, thus ensure that the casting quality of steel-concrete connecting beam section concrete.Precast concrete overhanging steel construction 50cm, to ensure follow-up closure segment and steel-concrete connecting beam section quality of connection.
Four) steel-concrete connecting beam section lifting
Steel-concrete connecting beam section is transported to positioning under bridge by transporting equipment, the slack tide period install steel-concrete connecting beam section on stand up hanger, erection crane lifts steel-concrete connecting beam section, after lifting certain altitude, front suspension centre progressively falls after rise, and steel-concrete connecting beam section starts to tilt, gradually leveling, complete aerial 90 degree of steel-concrete connecting beam section and stand up work, and again transfer to transporting equipment.
Erection crane suspender is changed to the lifting hanger of steel-concrete connecting beam section, and normal hoisting steel-concrete connecting beam section to design height completes the accurate adjustment of steel-concrete connecting beam section aerial statue by the three-dimensional regulating system of erection crane.
Five) stiff skeleton is installed
After steel-concrete connecting beam section completes the adjustment of aerial statue, with shaped steel, steel-concrete connecting beam section is welded and fixed with the built-in fitting on the concrete box girder of cantilever.
Six) closure segment construction
Interim suspension bracket is set up on concrete cantilever beam section, interim suspension bracket sets up cast-in-place concrete exterior sheathing, process assembling reinforcement, the preparation such as arrangement prestress pipeline；Internal model is installed, colligation connects roof steel bar, prestress pipe etc., casting concrete maintenance.
Seven) bridge prestress construction
This is not repeating for common process.
More specifically construction technology process is shown in Fig. 2.
Key points for operation
(1) preparation of construction
A, do the expense plan of good material, equipment, plan on demand is purchased and carried out quality examination work of marching into the arena；
B, carry out workmen's division of labor and arrange, and carry out detailed security, confide a technological secret；
C, carry out the calibration operation of measuring instrument, repetition measurement is carried out to SURVEYING CONTROL NETWORK；
First 2 days of d, lifting, carry out Continuous Observation to cantilever end beams of concrete end face；
E, carry out communication and coordination with departments such as maritime affairs, issue iceound bulletin in advance.
(2) erection crane system is installed
Erection crane system is formed by a large amount of primary structural component spellings, can be using assembled integral hoisting installation method in place in original position assembly on bridge or field when assembled, specific requirement following points in installation:
A, the numbering of each component of attention, it is to avoid mixed, are installed in strict accordance with installation diagram numbering；
B, need the surface relatively slided carry out antirust, lubrication to having in hoisting process, and ensure the cleaning on surface；
C, when hoist cable is installed, each half of positive and negative rotation steel strand wires, on anchorage, each circle steel strand wires need positive and negative rotation to be alternately arranged；
After d, structure are installed, the bolt that component connects, bearing pin need to be checked, bolt is applied to twist and strictly carried out by code requirement.
(3) steel-concrete connecting beam section concrete is prefabricated
When steel-concrete connecting beam section concrete is prefabricated, steel-concrete connecting beam section steel construction is vertically laid (wet joint end is upward), assembling reinforcement, installation form simultaneously pour concrete, concrete overhanging steel construction end face 50cm is advisable.
In concrete placings, note vibrating it is ensured that concrete dense packing effect is at each position of steel construction to the narrow chamber in steel construction, give full play to its power transmission effect.
(4) transport secure positioning
Steel-concrete adapter section section adopts barging, positions perpendicular to bridge route direction during lifting.
The positioning step that casts anchor is as follows:
A, in the given area near end bay, throw lower located lateral anchor；
B, ship meet water and flow the anchor chain in bow direction under throwing in given area；
C, loosen hawser, barge flows movement downstream, after barge moves to given area, throw the anchor chain in lower stern direction；
D, tighten up the hawser of bow anchor, loosen stern hawser, make barge complete Primary Location；
E, with the suspender transferred in advance as reference, by adjusting the hawser of 3 anchors, make barge complete to be accurately positioned, required precision 1m.
Transport secure positioning specific requirement following points:
A, cast anchor before, check that the shackle that is connected with steel wire rope of anchor has or not damage, have infringement must change in advance；
B, cast anchor before, check steel wire rope have impulse- free robustness, fracture of wire phenomenon；If any it is necessary to change；
C, when casting anchor, the plan-position of anchor need to be positioned it is ensured that anchor has enough grips with boat-carrying gps or measurement gps；
Before d, lifting, the moment pays close attention to the relative position of steel-concrete connecting beam section hanger and the suspender of erection crane decentralization, and ensures both deviations in the range of 1m by adjustment in time；
(5) turnover lifting appliance is installed
Suspender and steel-concrete connecting beam section hanger are pin joint, install using manually carrying out, install spacing steel plate after bearing pin installation is in place.
Suspender installation specific requirement following points:
Before a, installation, need to be to hanger, bearing pin and suspender coating lubricating oil, the burr on removing hanger and suspender is it is ensured that suspender is smoothly installed；
B, when installing, it is necessary to assure steel strand wires install after vertically, vertically without spin, wrapping phenomena；
When c, installation, need to carry out, and be rapidly completed whole suspenders installing under steel strand wires relaxed state, the situation of change that the moment pays close attention to water level makes part suspension centre stress it is ensured that non-reason water level reduces；
(6) lifting of steel-concrete connecting beam section, air turning
Steel-concrete connecting beam section elevating mechanism is the erection crane being arranged on box girder cantilever end, lifting power is provided by hydraulic continuous jack, two sides lift system is controlled by a turn-key system, the internal force of each jack and stroke in real-time monitoring system, and in the case that certain part jack is suspended by general control system, in addition arbitrarily jack stroke can be adjusted, realize the uniform stressed of jack.
The lifting of steel-concrete connecting beam section, air turning step are as follows:
Before a, lifting, check suspension centre and suspender
Whether b, the constraint of connection, the plan-position of cargo ship and steel-concrete connecting beam section and cargo ship release；
Using computer control system, steel-concrete connecting beam section is carried out with hierarchical loading (point three-level, load added by every grade is 20%, 50%, the 80% of steel-concrete connecting beam section theoretical weight).Often load one-level need to stop loading and the components such as suspension centre, suspender and erection crane being inspected, inspect by then carrying out next procedure, inspect and do not pass through need to carry out the analysis of causes in time, next procedure can be carried out after solution removes；
A, using computer control system, steel-concrete connecting beam section is lifted, until when cargo ship 0.5m is left in steel-concrete connecting beam section bottom, stopping lifting and simultaneously the components such as suspension centre, suspender and erection crane are inspected；
B, using computer control system, leveling is carried out to steel-concrete connecting beam section；Whether the actual loading checking each jack, within ± the 10% of its theoretical load, should determine to be lifted or transfer steel-concrete connecting beam section to cargo ship according to assay；
C, computer control system is set to automatic lifting pattern, automatic synchronization lifts steel-concrete connecting beam section, until hoisting depth meets air turning requirement；
D, time-out front end 2 jack, rear end two jack are adjusted to lower mode playback, realize steel-concrete connecting beam section and overturn for the center of circle with front end two hanger, until steel-concrete connecting beam section top board level；
E, 4 jack are all adjusted to lower mode playback, overall decentralization steel-concrete connecting beam section；
D, adjustment plan-position, and temporary steel buttress is laid on commitment positions, it is put under steel-concrete connecting beam section on steel buttress；
E, continuation decentralization hoist cable, until it substantially relaxes, quickly remove suspender and stand up the direct bearing pin of hanger.
The lifting of steel-concrete connecting beam section, air turning specific requirement following points:
Before f, lifting, should reinforcing bar influential on the process of standing up, bellows etc. process, it is to avoid impact is produced on process of standing up；
In g, lifting and decentralization process, note the observation to steel-concrete connecting beam section top surface levelness, such as uneven, need to suspend in time and be lifted and be adjusted；
After h, temporary steel buttress are installed, its stationarity need to be checked with the stability it is ensured that after stress；
After steel-concrete connecting beam paragraph is on the steel buttress, need to continue to transfer hoist cable and hanger bearing pin can be removed to obvious relaxed state, and accomplish synchronous dismounting as far as possible.
(7) stand up hanger to cut off
Consider to cut off standing up on base plate hanger is more difficult after lifting is in place, stand up complete to fall within temporary rest pier after carry out standing up cutting off of hanger.
Stand up hanger and cut off specific requirement following points:
A, stand up in base plate and rule at the leg of hanger, using this line as cutting off sideline；
When b, hanger cut off, note the protection to manifold section steel construction, it is to avoid steel construction is produced and destroys.
(8) hoisting sling is installed
Suspender is installed with reference to 5)
(9) steel-concrete connecting beam section lifting
Steel-concrete connecting beam section lifting step is as follows:
Before a, lifting, the connection of inspection suspension centre and suspender, the plan-position of cargo ship；
B, using computer control system, steel-concrete connecting beam section is carried out hierarchical loading (point three-level, load added by every grade be steel-concrete connecting beam section theoretical weight 20%, 50%, 80%).Often load one-level need to stop loading and the components such as suspension centre, suspender and erection crane being inspected, inspect by then carrying out next procedure, inspect and do not pass through need to carry out the analysis of causes in time, next procedure can be carried out after solution removes；
C, using computer control system, steel-concrete connecting beam section is lifted, until when cargo ship 0.5m is left in steel-concrete connecting beam section bottom, stopping lifting and simultaneously the components such as suspension centre, suspender and erection crane are inspected；
D, using computer control system, leveling is carried out to steel-concrete connecting beam section；Whether the actual loading checking each jack, within ± the 10% of its theoretical load, should determine to be lifted or transfer steel-concrete connecting beam section to cargo ship according to assay；
E, computer control system is set to automatic lifting pattern, automatic synchronization lifting steel-concrete connecting beam section is to commitment positions.
Steel-concrete connecting beam section lifting specific requirement following points:
Before f, lifting, suspender should be connected and erection crane system checks；
It should be noted that observation to steel-concrete connecting beam section top surface levelness in g, lifting process, such as uneven, need to suspend in time and be lifted and be adjusted；
(10) steel-concrete connecting beam section is accurately positioned
Being accurately positioned of steel-concrete connecting beam section, can the positioning precision especially closing up port with big sections steel box-girder determine big sections steel box-girder and close up and close up quality.As two steel-concrete connecting beam section port Reversal values, reflect on big sections steel box-girder is exactly the synergistic effect of a deviation.So big sections steel box-girder closes up the positioning precision that precision depends entirely on two steel-concrete connecting beam sections.During positioning, data feedback will be observed to lift system control room by in-site measurement, system operators are passed through to adjust 4 vertical lifting jack and longitudinal and transverse shifting system, realize being accurately positioned of steel-concrete connecting beam section.
Steel-concrete connecting beam section is accurately positioned specific requirement following points:
Before a, the lifting of steel-concrete connecting beam section, at least Continuous Observation should be carried out to two cantilever end box beams, find out the situation of change of its temperature influence；
When b, steel-concrete connecting beam section locus calculate, the various factors of reply impact spatial attitude considers complete, such as temperature, lifting time, structural load etc.；
C, the protection to observation station in steel-concrete connecting beam section for the attention, it is to avoid destroy observation station, lead to not complete to be accurately positioned.
(11) steel-concrete connecting beam section temporary consolidation
After steel-concrete connecting beam section is accurately positioned and completes, by Bridge Design requirement temporary consolidation component is installed, the connection of temporary consolidation component and steel-concrete connecting beam section and cantilever end box beam must be reliable.
(12) wet joint construction
Wet joint is constructed using hanging modulus method.
Wet joint construction procedure is as follows:
A, installation external mold, and by essence bundle spiral, external mold is anchored in steel-concrete connecting beam section and cantilever end box beam；
B, installation wet joint section bottom, web reinforcement and pre-stress system；
C, installation internal model, colligation roof steel bar, casting concrete；
D, the health of concrete, carry out tensioning and the mud jacking of pre-stress system, and form removal system.
Although being described to the preferred embodiments of the present invention above in conjunction with accompanying drawing; but the invention is not limited in above-mentioned specific embodiment; above-mentioned specific embodiment is only schematically; it is not restricted; those of ordinary skill in the art is under the enlightenment of the present invention; in the case of without departing from present inventive concept and scope of the claimed protection, a lot of forms can also be made, these belong within protection scope of the present invention.
Claims (2)
1. a kind of construction method of steel-concrete connecting beam section is it is characterised in that comprise the following steps:
One) make in steel-concrete connecting beam section factory
Two) erection crane on-site consolidation in place, debugging, meanwhile steel-concrete connecting beam section factory in fortune
To job site；
Three) steel-concrete connecting beam section concrete is vertically prefabricated
Steel-concrete connecting beam section is vertically placed, carry out the reinforcing bar binding of steel-concrete connecting beam section, model sheetinstallat,
The vertical pouring construction of concrete；
Four) steel-concrete connecting beam section lifting operation
Steel-concrete connecting beam section is transported to positioning under bridge by transporting equipment, using turning in steel-concrete connecting beam section
Body hanger, erection crane lifted steel-concrete connecting beam section in the air 90 degree stand up work, and again under
Put to transporting equipment, the suspender on erection crane is changed to reference on the lifting hanger in beam section, then
Normal hoisting steel-concrete connecting beam section, to design height, is completed by the three-dimensional regulating system of erection crane
The accurate adjustment of steel-concrete connecting beam section aerial statue；
Five) stiff skeleton is installed
With shaped steel, steel-concrete connecting beam section is welded and fixed with the built-in fitting on the concrete box girder of cantilever；
Six) closure segment construction
Closure segment reinforcing bar binding between steel-concrete connecting beam section and concrete box girder, installation form, installation
Presstressed reinforcing steel, pour closure segment concrete construction；
Seven) bridge prestress construction
Close up after section concrete reaches design strength, carry out steel-concrete connecting beam section prestressed stretch-draw, pressure
Slurry, is removed erection crane and is constrained with steel-concrete connecting beam section.
2. the construction method of steel-concrete connecting beam section according to claim 1, its feature exists
In in described step 3) in, vertically placed by the girder steel of factory process, and need casting concrete one
End upward, pours, vertical layered vibrates in conjunction with section concrete is vertical layered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081269.1A CN104727226B (en) | 2015-02-15 | 2015-02-15 | Construction method for steel-concrete composite girder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081269.1A CN104727226B (en) | 2015-02-15 | 2015-02-15 | Construction method for steel-concrete composite girder |
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| CN104727226A CN104727226A (en) | 2015-06-24 |
| CN104727226B true CN104727226B (en) | 2017-01-25 |
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| CN105672135A (en) * | 2016-01-26 | 2016-06-15 | 浙江兴土桥梁临时钢结构工程有限公司 | Simulation pre-pressing method for concrete box girder construction supporting frame |
| CN106592777B (en) * | 2016-10-27 | 2019-02-19 | 绍兴文理学院 | Assembled steel-is mixed to combine beam-column node structure and its implementation method |
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