CN206571049U - Precast block formula secondary prestress Wavelike steel webplate combination beam - Google Patents
Precast block formula secondary prestress Wavelike steel webplate combination beam Download PDFInfo
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- CN206571049U CN206571049U CN201720224274.8U CN201720224274U CN206571049U CN 206571049 U CN206571049 U CN 206571049U CN 201720224274 U CN201720224274 U CN 201720224274U CN 206571049 U CN206571049 U CN 206571049U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 239000011178 precast concrete Substances 0.000 claims abstract description 53
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 25
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005194 fractionation Methods 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model discloses a kind of precast block formula secondary prestress Wavelike steel webplate combination beam, including by multiple i-shaped beamses body units, by the horizontal and vertical combination beam body being formed by connecting, i-shaped beamses body unit is made up of individually prefabricated precast concrete top plate, precast concrete bottom plate and Wavelike steel webplate splicing；Shear connector, top plate lateral connection reinforcing bar, the longitudinally connected reinforcing bar of top plate and top plate prestressed pore passage are embedded with precast concrete top plate；Lower shear connector, bottom plate lateral connection reinforcing bar, the longitudinally connected reinforcing bar of bottom plate, prestressed pore passage of bottom plate and bottom plate secondary prestress duct are embedded with precast concrete bottom plate；Wavelike steel webplate periphery is reserved with the bolt hole for connecting the upper and lower shear connector.The utility model carries out beam body erection using the assembled structure type of precast block, and the volume and weight of each part are all corresponding smaller, and transport is stable, Hoisting Security, beneficial to construction.
Description
Technical field
The utility model is related to bridge construction technical field, more particularly, to a kind of precast block suitable for large bridge
Formula secondary prestress Wavelike steel webplate combination beam.
Background technology
Traditional prefabricated case beam web is generally concrete material, and not only weight is big and easy to crack, therefore concrete box girder is only suitable for
Applied to small across footpath（Below 40m）Highway bridge.Wavelike steel webplate PC combined box beams are carried out from ACSI associations in 1988
After introduction, Wavelike steel webplate PC combination beams achieve bridge as a kind of economic, efficient, easy construction novel bridge form
The extensive approval of worker is simultaneously applied to big-and-middle-sized bridge by expanding（More than 50m across footpaths）Practical Project in.
Constructed more than existing Wavelike steel webplate PC combined box beams using the following two kinds form：
A kind of is that the roof support with reinforced concrete, reinforced concrete floor and Wavelike steel webplate of whole box girder body are divided into three
Individual part carries out integral prefabricated respectively, lifts again afterwards in place, assembly is connected by screw bolts at bridge location.Chinese patent is " assembled
Formula prestressed concrete combined box beam "（Application number 200620126505.3）The prefabricated component of said structure is disclosed, and emphatically
Describe Wavelike steel webplate and top plate, the connected mode of bottom plate.But, due to box beam top plate, bottom plate and the web of this structure
It is integral structure, the weight of single prefabricated components is still very heavy.The a width of 16.75m of such as bridge box girder with corrugated steel webs bridge,
The weight of its every linear meter(lin.m.) is up to more than 10t, even if it is still very difficult to lift single prefabricated components during construction respectively.Secondly, it is
Convenient transport, the length of prefabricated components generally will not be very long, and above-mentioned full span erection structure is only limitted to the bridge of small across footpath, for big
The bridge of across footpath, top plate and web still can be using the prefabricated forms of segmentation.In addition, the patent do not account for it is pre- during practice of construction
Situations such as application opportunity of stress steel beam and reserving hole channel, and also not plus discussed for the treatment measures of hogging moment area, if lacked
The measure of weary reply beam body loaded deformation and the detailed consideration of Specific construction process aspect, the feasibility of construction are poor.
Another is that top plate, bottom plate and Wavelike steel webplate are fixed to the precast assembly unit for being linked to be I-shaped structure, at the scene
Bridge construction, such as Chinese patent " two times tensioning are completed after the assembled rigid unit of multiple I-shaped structures is carried out into horizontal and vertical splicing
Prestressing force assembled Wavelike steel webplate combination beam and its construction method "（Application number 201510255113.0）Disclose above-mentioned knot
The transverse H-shaped prefabricated member of structure, and apply secondary prestress in corresponding opportunity, realize the laterally assembled of transverse H-shaped prefabricated member.It is above-mentioned
Prefabricated assembled rigid unit volume is big, tonnage weight（Weight of such as single prefabricated I-shaped unit per linear meter(lin.m.) is i.e. up to 5t or so）,
And the stability of itself is also poor, easily causes cost of transportation and hoisting cost rises；Will to lifting appliance in installation process
Ask higher, hoisting safety is relatively low；Simultaneously because the Wavelike steel webplate in assembled rigid unit is fixedly connected between top plate and bottom plate,
Therefore each part in the precast assembly unit can not adjust, it is not replaceable, add the difficulty of later maintenance；Simultaneous
The increasingly increase of the volume of traffic, the bearing capacity of beam body can not adapt to the traffic under new situation.
The content of the invention
The utility model provides a kind of precast block formula secondary prestress Wavelike steel webplate combination beam, it is therefore intended that solve existing
There are Wavelike steel webplate PC combined box beams easily to occur transporting when being applied to large bridge, lift and later maintenance in terms of ask
Topic.
To achieve the above object, the utility model can take following technical proposals：
Precast block formula secondary prestress Wavelike steel webplate combination beam described in the utility model, including by multiple I-shaped
Beam body unit is by the horizontal and vertical combination beam body being formed by connecting, and the i-shaped beamses body unit is by individually prefabricated prefabricated mixed
Solidifying soil top plate, precast concrete bottom plate and Wavelike steel webplate splicing composition；It is embedded with the precast concrete top plate for connecting
Connect the upper shear connector of the Wavelike steel webplate and the top plate lateral connection steel for connecting contiguous prefabricated concrete roof
The top plate prestressing force for wearing hogging moment tensioning steel beam is provided with muscle and the longitudinally connected reinforcing bar of top plate, precast concrete top plate
Duct；Be embedded with the precast concrete bottom plate for connect the Wavelike steel webplate lower shear connector, for connecting
The longitudinally connected reinforcing bar of bottom plate lateral connection reinforcing bar and bottom plate of contiguous prefabricated concrete floor, and for wearing tensioning steel beam
Prestressed pore passage of bottom plate and bottom plate secondary prestress duct；The Wavelike steel webplate periphery is reserved with described for connecting
The bolt hole of upper and lower shear connector.
The upper shear connector is identical with lower shear connector structure, including connecting plate and being vertically welded in the company
Waveform wing plate on fishplate bar, the Waved wing edges of boards edge offers connecting hole, the another side of connecting plate be welded be embedded in it is prefabricated
WELDING STUDS in concrete roof or precast concrete bottom plate.
Constitute single precast concrete top plate, precast concrete bottom plate and the Wavelike steel webplate of the i-shaped beamses body unit
Length be respectively 5-30 meters.
Precast block formula secondary prestress Wavelike steel webplate combination beam of the present utility model, using independent prefabricated i-shaped beamses
Precast concrete top plate, precast concrete bottom plate and the Wavelike steel webplate of body unit, reproduce the mode that field carries out concatenation construction.This
Utility model is used carries out piecemeal to existing integral prefabricated I-shaped component in a vertical enterprising step, on the one hand makes full use of
" the fold effect " of Wavelike steel webplate realizes that box beam breaks the whole up into parts, and prefabricated components volume is fully reduced, subtracts component volume
It is small, the requirement of construction equipment is reduced, more easily transports and lifts, be conducive to the fast erecting of bridge, while avoiding whole
The problem of prefabricated I-shaped component self stability of body is poor；On the other hand distinctive weak " the beam-ends effect of Wavelike steel webplate is also utilized
Should ", the duct for wearing hogging moment prestressed stretch-draw steel beam is provided with top plate, is employed in precast concrete bottom plate
Prestressed strand and secondary prestress steel beam, with work progress perfect cooperation, realize the maximum convenient of construction.Wherein, exist
Precast concrete bottom plate is prefabricated to complete prestressed strand of post-stretching, the stress for resisting concrete shrinkage and creep generation,
And after the completion of box beam splicing, tensioning secondary prestress steel beam can reduce the antiarch that combined box beam is produced by shrinkage and creep；Top plate
Be embedded with the shear connector for being connected with Wavelike steel webplate on bottom plate, adjacent top plate and bottom plate are at bridge construction scene
Splicing laterally and/or longitudinally can be carried out so that the bridge for obtaining various requirement is wide, spanning by pouring wet seam arrangements.So,
The utility model by the top plate in i-shaped beamses body unit, bottom plate and web disassemble progress it is prefabricated, be effectively reduced each prefabricated
The volume and weight of part, greatly reduce transport and hoisting difficulty；And because Wavelike steel webplate passes through bolt and top plate and bottom
Plate is attached, if during the increase of the later stage volume of traffic, can also realize the tune to beam body height by the replacing to Wavelike steel webplate
Whole or maintenance, reaches the purpose of increase bridge structure bearing capacity；Be movably connected between above-mentioned prefabricated component, can repeat install with
Dismounting, therefore partial precast part can also be reused after bridging toughening, provide one for the recyclable development of bridge structure
Plant effective thinking.Specifically, advantage of the present utility model can be embodied in it is following some：
（1）The utility model carries out beam body erection using the assembled structure type of precast block, the volume of each part and again
Amount is all corresponding smaller, stability of the prefabricated component in transportation can not only be effectively ensured, and be easily guaranteed that in hoisting process
The security of component, beneficial to construction.
（2）Wavelike steel webplate in the utility model can be removed and installed, and facilitate maintenance and inspection of the later stage to beam body,
The Wavelike steel webplate being damaged can be changed simultaneously, realize adjustment beam body height, the purpose of increase structural-load-carrying capacity.
（3）Each part of the utility model Bridge can be dismantled so that each part of bridge can be reused, it is to avoid
The problem of concrete and composite bridge are difficult to recycling.
（4）The utility model is in addition to the alterable height of corrugated sheet steel, and other concrete components are standard component, possesses big rule
The condition of mould standardized production.
（5）The utility model carries out assembly on the simple Mobile support device of form, it is not necessary to set special on periphery
Consolidation shed, be more suitable for the rapid construction of Urban Bridge.
Brief description of the drawings
Fig. 1 is the structural representation of i-shaped beamses body unit in the utility model.
Fig. 2 is the structural representation of precast concrete top plate in Fig. 1.
Fig. 3 is the structural representation of precast concrete bottom plate in Fig. 1.
The structural representation of upper and lower shear connector in Fig. 4 Fig. 2,3.
Fig. 5, Fig. 6, Fig. 7 are work progress schematic diagrames.
Fig. 8-13 is the relevant drawings that schematic illustration is carried out to the utility model.
Embodiment
Precast block formula secondary prestress Wavelike steel webplate combination beam described in the utility model, including by multiple such as Fig. 1
Shown i-shaped beamses body unit is by the horizontal and vertical combination beam body being formed by connecting, and the i-shaped beamses body unit is by individually pre-
Precast concrete top plate 1, precast concrete bottom plate 2 and the splicing composition of Wavelike steel webplate 3 of system；As shown in Fig. 2 precast concrete
Be embedded with top plate 1 for connect Wavelike steel webplate 3 upper shear connector 1.1, for connecting contiguous prefabricated concrete roof
Top plate lateral connection reinforcing bar 1.2 and the longitudinally connected reinforcing bar 1.3 of top plate, be provided with three in the pier top of precast concrete top plate 1
The individual top plate prestressed pore passage 1.4 for being used to wear hogging moment tensioning steel beam；As shown in figure 3, pre-buried in precast concrete bottom plate 2
Have for connecting the lower shear connector 2.1 of Wavelike steel webplate, laterally connecting for connecting the bottom plate of contiguous prefabricated concrete floor
Reinforcing bar 2.2 and the longitudinally connected reinforcing bar 2.3 of bottom plate are connect, and for wearing prestress hole of two bottom plates of single tension steel beam
Road 2.4 and two bottom plate secondary prestress ducts 2.5 for wearing two times tensioning steel beam；It is pre- in the periphery of Wavelike steel webplate 3
Leave the bolt hole for connecting upper shear connector 1.1 and lower shear connector 2.1.
To reduce prefabricated cost, the structure phase of upper shear connector 1.1 and lower shear connector 2.1 of the present utility model
Together, exemplified by above shear connector 1.1, as shown in figure 4, including connecting plate 1.1a and the ripple being vertically welded on connecting plate 1.1a
Shape wing plate 1.1b, waveform wing plate 1.1b edges have connecting hole, the bolt hole that the connecting hole is reserved with the periphery of Wavelike steel webplate 3
Correspondence, wears connecting bolt 4, the another side of connecting plate, which is welded with, is embedded in concrete during for combined I-shaped type beam body unit
WELDING STUDS 1.1c of in the native top plate and end with anti-drop block.
Workload is poured to reduce scene splicing, efficiency of construction is improved, the single prefabricated mixed of i-shaped beamses body unit is constituted
The length of solidifying soil top plate 1, precast concrete bottom plate 2 and Wavelike steel webplate 3 is respectively 5-30 meters.
During precast block formula secondary prestress Wavelike steel webplate combination beam construction described in the utility model, in the steps below
Carry out：
The first step, in precasting yard, precast concrete top plate 1, precast concrete bottom plate 2 are carried out according to design requirement respectively
It is prefabricated with Wavelike steel webplate 3：For precast concrete top plate 1 and precast concrete bottom plate 2, colligation steel is distinguished on request first
Muscle net, then shear connector, prestressed pore passage etc. are installed in place, then restraining stencil, casting concrete are installed；Treat concrete
Reach after design strength, remove restraining stencil.Wherein, for precast concrete bottom plate 2, reply is located at bottom plate after form removal
Single tension steel Shu Jinhang tensioning in prestressed pore passage 2.4, for resist bottom plate in lifting and erection process due to
The moment of flexure that deadweight is produced；For Wavelike steel webplate 3, after the completion of overall processing, it should remain for that connection is upper and lower to cut in advance in design attitude
The bolt hole of power connector 1.1,2.1；
Second step, as shown in figure 5, setting Mobile support device 6 between the abutment or bridge pier 5 that complete construction as auxiliary
Operation platform, the precast concrete bottom plate 2, Wavelike steel webplate 3 and precast concrete of job site will be transported to hanging device
Top plate 1 is lifted to Mobile support device 6 successively, and by connecting bolt 4 by precast concrete bottom plate 2 and Wavelike steel webplate 3,
Wavelike steel webplate 3 is attached with precast concrete top plate 1, completes first i-shaped beamses body unit（As shown in Figure 6）Dress
With construction；Above-mentioned Mobile support device 6 can be using the flat car for being provided with support frame；
3rd step, by Mobile support device 6 along bridge cross direction horizontal transfer, is completed in the spanning according to the method for second step
The assembling construction of other i-shaped beamses body units transversely set, then in the top plate and bottom plate of adjacent i-shaped beamses body unit
Between colligation top/bottom plate lateral connection reinforcing bar formation bar-mat reinforcement respectively, then casting concrete, is formed at the top and bottom of box beam
Steel top plate longitudinal wet joint 7 and precast concrete bottom plate longitudinal wet joint 8（As shown in Figure 6）；In precast concrete bottom plate longitudinal direction
Wet seam 8 is reached after some strength, is pointed to the tensioning steel Shu Jinhang tensioning in bottom plate secondary prestress duct 2.5, for
The moment of flexure that anti-second phase load is produced；
4th step, next spanning position is transferred to by Mobile support device 6, repeats second step and the 3rd step operation, is completed
The construction of the spanning beam body；
5th step, in adjacent bridge, the longitudinally connected reinforcing bar of colligation top/bottom plate forms bar-mat reinforcement, and casting concrete between,
Form laterally wet seam or crossbeam 9（As shown in Figure 7）；When laterally wet seam or crossbeam 9 reach some strength, according to first side bar
The order of central sill afterwards, the tensioning steel beam being pointed to using symmetrical tensioning principle in the top plate prestressed pore passage 1.4 of adjacent across footpath is entered
Row tensioning, the pier top hogging moment for resisting adjacent across footpath box beam forms continuous beam on many supports system.
Precast concrete top plate 1 of the present utility model, precast concrete bottom plate 2 and Wavelike steel webplate 3 pass through connecting bolt 4
It is connected as a single entity, and bolt connection is Detachable connection structure, therefore can be realized by the replacing to Wavelike steel webplate high to beam body
The adjustment of degree, to reach the purpose of increase structural-load-carrying capacity, while being also convenient for later maintenance；Above-mentioned prefabricated component is repeated simultaneously
Install with dismantling, if after bridging toughening, prefabricated component is still repeated and utilized, and improves the cyclic utilization rate of prefabricated component, can be effective
Save bridge construction cost and shorten the construction period.
Vertically spliced the following is to the utility model Wavelike steel webplate built H beam, and apply two in opportune moment
The concrete principle explanation that feasibility, the reasonability of secondary this construction method of prestressing force are made：
Stress of the precast concrete bottom plate under two states is analyzed first.
1. the 1st state：
Precast concrete bottom plate as shown in Figure 8, the prestressing force that the stretch-draw prestressing force steel beam set in it is applied is N,
Then the section upper stress on precast concrete bottom plate is：
2. the 2nd state：
When above-mentioned precast concrete floor combination turns into I-shaped Wavelike steel webplate combination beam, its I-shape cross section structure
As shown in Figure 9.
Apply prestressing force N on precast concrete bottom plate, the moment of flexure to compound section neutral axis is：
Obtained by the area moment of upper lower section is equal：
The area of combination beam total cross-section is：
The moment of inertia of whole cross section is：
Wavelike steel webplate combination beam can not consider web due to the non resistance axle power of web when anti-bending bearing capacity is calculated
Effect, equivalent to without web plate section, therefore setting：
Then：
The stress of top plate：
Make ratio of height to thickness
The then stress of top plate：
The stress of bottom plate：
Have for general combination beam section, can obtain
By taking the Wavelike steel webplate combination beam of 30m across footpaths as an example.If, now, bring formula into（9）With（10）：
When the across footpath of bridge further increases,WithFurther increase, formula（10）Meet
As can be seen here, under the 1st state and the 2nd state, the stress approximately equal of precast concrete bottom plate.That is, first
The prestressing force that phase applies in the prefabricated panel stage, is still held essentially constant after Wavelike steel webplate combination beam is overlapped into.Therefore claim
Wavelike steel webplate combination beam take it is vertical layered it is assembled before and after this mechanical characteristics that can be held essentially constant of stress for overlapping by
Power consistency.This characteristic provides the foundation for the vertical layered splicing of Wavelike steel webplate combination beam.
On the basis of above-mentioned analysis, ordinary steel-mixed built H beam and Wavelike steel webplate built H beam are back to discuss
Vertical fractionation with it is assembled during stress change.Wherein, it regard prestressing force as only consideration external force：
1. vertical split process：
Figure 10 is the schematic diagram that ordinary steel-mixed built H beam is vertically split.
Figure 11 is the schematic diagram that Wavelike steel webplate built H beam is vertically split.
2. vertically splice+two stretching processes：
Figure 12 is schematic diagram when ordinary steel-mixed built H beam carries out vertically fractionation and two times tensioning.
Figure 13 is schematic diagram when Wavelike steel webplate built H beam carries out vertically fractionation and two times tensioning.
Contrast above-mentioned legend to can be seen that for Wavelike steel webplate built H beam, prestressing force is applied just in bottom plate
It seem an independent process；But the situation of ordinary steel-mixed combination is entirely different.Therefore, can be prefabricated in construction
Apply all or part of prestressing force during concrete floor, then by precast concrete bottom plate, Wavelike steel webplate and precast concrete
The vertical layered assembly of top plate, can so greatly reduce the steel Shu Zhangla workloads at scene, improve factory prefabricating degree.
Claims (3)
1. a kind of precast block formula secondary prestress Wavelike steel webplate combination beam, including pass through horizontal stroke by multiple i-shaped beamses body units
To with longitudinally connected combination beam body, it is characterised in that：The i-shaped beamses body unit is by individually prefabricated concrete
Native top plate, precast concrete bottom plate and Wavelike steel webplate splicing composition；It is embedded with the precast concrete top plate for connecting
The upper shear connector of the Wavelike steel webplate and the top plate lateral connection reinforcing bar for connecting contiguous prefabricated concrete roof
With the longitudinally connected reinforcing bar of top plate, the top plate prestress hole for wearing hogging moment tensioning steel beam is provided with precast concrete top plate
Road；Be embedded with the precast concrete bottom plate for connect the Wavelike steel webplate lower shear connector, for connecting phase
The bottom plate lateral connection reinforcing bar and the longitudinally connected reinforcing bar of bottom plate of adjacent precast concrete bottom plate, and for wearing the bottom of tensioning steel beam
Prestressed pore passage of plate and bottom plate secondary prestress duct；The Wavelike steel webplate periphery be reserved with for connect it is described,
The bolt hole of lower shear connector.
2. precast block formula secondary prestress Wavelike steel webplate combination beam according to claim 1, it is characterised in that：It is described
Upper shear connector is identical with lower shear connector structure, including connecting plate and the waveform being vertically welded on the connecting plate
Wing plate, the Waved wing edges of boards edge offers connecting hole, the another side of connecting plate be welded be embedded in precast concrete top plate or
WELDING STUDS in precast concrete bottom plate.
3. precast block formula secondary prestress Wavelike steel webplate combination beam according to claim 1, it is characterised in that：Composition
The length of the single precast concrete top plate of the i-shaped beamses body unit, precast concrete bottom plate and Wavelike steel webplate is respectively
5-30 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720224274.8U CN206571049U (en) | 2017-03-09 | 2017-03-09 | Precast block formula secondary prestress Wavelike steel webplate combination beam |
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| CN201720224274.8U CN206571049U (en) | 2017-03-09 | 2017-03-09 | Precast block formula secondary prestress Wavelike steel webplate combination beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440629A (en) * | 2018-11-11 | 2019-03-08 | 中铁二院工程集团有限责任公司 | Assembled steel web plate composite box joist steel web and precast slab connecting structure |
-
2017
- 2017-03-09 CN CN201720224274.8U patent/CN206571049U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440629A (en) * | 2018-11-11 | 2019-03-08 | 中铁二院工程集团有限责任公司 | Assembled steel web plate composite box joist steel web and precast slab connecting structure |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230116 Address after: Southwest corner of the intersection of New 107 National Road and 327 National Road, Yuanyang County, Xinxiang City, Henan Province 453500 Patentee after: Henan Zhongding Zhijian Technology Co.,Ltd. Address before: 450052 No. 70 Longhai Middle Road, Erqi District, Zhengzhou City, Henan Province Patentee before: HENAN PROVINCIAL COMMUNICATIONS PLANNING & DESIGN INSTITUTE Co.,Ltd. Patentee before: Li Feiran |
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| TR01 | Transfer of patent right |