CN108643449A - A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft - Google Patents
A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft Download PDFInfo
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- CN108643449A CN108643449A CN201810347233.7A CN201810347233A CN108643449A CN 108643449 A CN108643449 A CN 108643449A CN 201810347233 A CN201810347233 A CN 201810347233A CN 108643449 A CN108643449 A CN 108643449A
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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000009408 flooring Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241001079814 Symphyotrichum pilosum Species 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008261 resistance mechanism Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
- E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention is a kind of detachable prefabricated assembled steel-concrete combination beam structure, including " I " fonts girder steel, precast slab, concrete slab support and fixing component；The top flange of the " I " fonts girder steel is folded up to form channel steel formula top flange, concrete slab support is set to the bottom of prefabricated concrete board, the mixed mud beam of prefabricated concrete board and concrete slab support composition T-type structure, in the channel steel formula top flange of the mixed mud beam insertion girder steel of T-type structure, the connecting hole being uniformly arranged in concrete slab support, channel steel formula top flange is equipped with the preformed hole being evenly arranged, the connecting hole contraposition of the preformed hole and concrete slab bearing of the channel steel formula top flange of girder steel, fixing component realizes the splicing of beams of concrete and girder steel by preformed hole and connecting hole.Using prefabricated assembled, thus can rapid construction, floorings are replaceable, and can reduce cost.By the connection function of shear connector, concrete slab plays effect of contraction to girder steel compression flange, to enhance the stability of girder steel.
Description
Technical field
The invention belongs to science of bridge building and construction engineering technical field, specially a kind of detachable prefabricated assembled steel-is mixed
Solidifying soil combined beam structure and manufacture craft.
Background technology
Work progress complexity is that current domestic and abroad bridge builds common problem, and work progress complexity is to bridge construction
Influence to be embodied in long bridge construction period, of high cost, construction results and expected results gap big, the technology of construction personnel is wanted
Ask high, this will largely effect on the overall efficiency and social benefit of bridge construction.
The method for solving bridge construction process complexity has very much, and method universal at present is to use assembled composite structure.
With the quickening of social development process, engineering construction shows " two change ", i.e. " lightness " and " assembling ", in different fields
Extensive use, and the development trend of highway bridge at present.Undoubtedly, Composite Steel-Concrete Bridges are to realize " two change "
Best bridge structure form.
Combination beam can make full use of the high-tensile of steel and the high compressive strength of concrete, can improve application property
Can, reduce loss of prestress, reduce structure height etc. obtains advantage.Combination beam is convenient for factorial praluction, in-site installation matter
Amount is high, operating expenses is low, speed of application is fast, and can be adapted for traditional masonry and the case where concrete structure is difficult to apply.
Combination beam producing principle is the connection that concrete slab and girder steel are realized by shear connector.Pass through shear connector
Connection function, concrete slab plays effect of contraction to girder steel compression flange, to enhance the stability of girder steel, favorably
In giving full play to for the strength of materials.In conventional assembled combination beam, the nail rod of WELDING STUDS is perpendicular to girder steel top flange.But with
The growth of sliding, shear-carrying capacity decaying is very fast, then loses bearing capacity suddenly, and final combination beam is broken brittleness occurs
It is bad.
Invention content
In order to solve the problems, such as that the shear resistance deficiency of conventional formula steel-mixed mud combination beam, the present invention provide a kind of construction week
Phase is short, it is at low cost, make detachable assembling type steel-concrete composite beam and manufacture craft simple, that shear resistance is strong.
The technical solution adopted by the present invention to solve the technical problems is：A kind of detachable prefabricated assembled steel-concrete
Combined beam structure, including " I " fonts girder steel, precast slab, concrete slab support and fixing component；" work " word
The top flange of section steel beam is folded up to form channel steel formula top flange, and the concrete slab support is set to the bottom of prefabricated concrete board
Portion, the mixed mud beam of prefabricated concrete board and concrete slab support composition T-type structure, the mixed mud beam insertion of the T-type structure
In the channel steel formula top flange of girder steel, the connecting hole being uniformly arranged in the concrete slab support, channel steel formula top flange is equipped with uniform
The preformed hole of arrangement, the connecting hole contraposition of the preformed hole and concrete slab bearing of the channel steel formula top flange of girder steel, fixed structure
Part realizes the splicing of beams of concrete and girder steel by preformed hole and connecting hole.
Preferably, concrete slab both sides lower flange is equipped with waterproof layer.
Further, the girder steel connect the fixing component used with beams of concrete as bolt, bolt pass through preformed hole and
After connecting hole, other end screws fixation with hexagonal (hexagon)nut, completes the connection of girder steel and beams of concrete.
Further, the bolt is using 10.9 grades of M22 types high-strength bolts, 8.8 grades of M20 types high-strength bolts or 10.9
Grade M24 type high-strength bolts.
As it is another preferably, sleeve is equipped in the connecting hole of the bearing of the concrete slab.
Further, contact position is equipped with cushion block on the outside of the preformed hole of the channel steel formula top flange of the fixing component and girder steel.
The present invention also uses another technical solution：A kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures
Manufacture craft includes the following steps：The first step, according to engine request, to the channel steel formula top flange of the girder steel, girder steel with it is described
Precast slab contact surface is dusted and processing of rust removing；
Second step arranges girder steel according to engine request direction；
Third walks, and sleeve is arranged in the connecting hole of the bearing of concrete slab；
4th step arranges waterproof layer in concrete slab both sides lower flange；
5th step carries out the connecting hole of the precast slab and the preformed hole of the channel steel formula top flange of the girder steel
Contraposition；
6th step realizes the connection of girder steel and concrete slab by fixing component.
Preferably, the manufacture craft of the detachable prefabricated assembled Steel-concrete Combined Beam Structures is：The first step,
According to engine request, the channel steel formula top flange and the precast slab contact surface of the girder steel, girder steel are dusted
And processing of rust removing；
Second step arranges girder steel according to engine request direction；
Third walks, and sleeve is arranged in the connecting hole of the bearing of concrete slab；
4th step arranges waterproof layer in concrete slab both sides lower flange；
5th step carries out the connecting hole of the precast slab and the preformed hole of the channel steel formula top flange of the girder steel
Contraposition；
6th step realizes the connection of girder steel and concrete slab by high-strength bolt；
Bolt is screwed completion with hexagonal (hexagon)nut and fixed by the 7th step.
The present invention technical concept be：Using the combination beam for being vertically arranged high-strength bolt, the ultimate bearing capacity of bolt is low,
When on bridge floor load increase to a certain extent when, bolt its bearing capacity for being vertically arranged can continuously decrease then loses carrying suddenly
Power, and with the increase of slippage, shear-carrying capacity decaying is very fast, for the problem, the present invention is high-strength using lateral arrangement
The mode of bolt, to improve the shear resistance and slip property of combination beam.When bridge floor bearing load, concrete slab support can be with
Channel steel formula top flange generates extruding, therefore steel plate will produce buckling, and for the problem, the present invention adds a sleeve outside high-strength bolt
To support the channel steel formula top flange of girder steel.When bridge floor has water, water infiltration downwards to have the possibility of corrosion bolt, asked for this
Topic, the present invention add a waterproof layer in concrete slab lower flange.The present invention can save construction using prefabricated assembled, reduction
Cost.By the connection function of shear connector, concrete slab plays effect of contraction to girder steel compression flange, to enhance
The stability of girder steel, is conducive to giving full play to for the strength of materials.The reduction of depth of section keeps construction profile more dainty, changes
The landscape effect of kind bridge is conducive to increase under-clearance or reduces bridge elevation.The present invention is in combination beam using lateral cloth
Set high-strength bolt, therefore suffering restraints effect around the concrete in connector region, this can make its shearing resistance mechanism with it is conventional vertically
The combination beam for being distributed bolt is different.Constraint around concrete can improve concrete strength, increase component ductility, constraint production
Raw extruding force also can make the rubbing action between steel and concrete more obvious.Section between girder steel and concrete rubs to combining
The shear resistance of beam has larger contribution, and the ultimate bearing capacity of cross bolts is also above the bolt being vertically arranged.And work as high-strength spiral shell
When bolt lateral arrangement, compared with the conventional combination beam being vertically arranged, skidding distance is elongated, and therefore, the ductility of combination beam also can
It improves.Steel beam flange is folded towards, and forms a kind of channel steel formula edge of a wing, and after splicing with concrete support, structure more stablizes safety.
Compared with the prior art, the present invention has following advantageous effects：
1, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, using lateral arrangement high-strength bolt,
The shear-carrying capacity of high-strength bolt is improved, can solve the problems, such as that high-strength bolt shear resistance is insufficient.
2, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, the channel steel formula top flange on girder steel
Section friction between concrete support improves the shear resistance of combination beam, can solve that high-strength bolt shear resistance is insufficient to ask
Topic.
3, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, concrete slab lower flange is added anti-
Water layer can solve the problems, such as bolt corrosion.
4, sleeve is used in the present invention, can be used to support the channel steel formula top flange of girder steel to reduce buckling, and can be to avoid mixed
The premature rupture of soil is coagulated, and bolt tightening latch can be overcome the problems, such as by concrete erosion.
5, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, the quality of girder steel and concrete slab
Higher requirement can be obtained, on-site consolidation and maintenance work can control within 3 days, and traffic caused by solving envelope bridge is stifled
Plug problem.
6, the present invention uses the form of prefabrication and assembly construction, greatly reduces construction cost and duration, and when runing in the later stage, attachment strap
After local failure of structure, local replacement may be used, replacement process is convenient, can overcome the problems, such as long construction period, of high cost.
7, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, using lateral arrangement high-strength bolt,
Structure sliding can be more steady, and structure ductility is more preferable, and combination beam has good slip property.
8, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention are suitble to various forms of bridges.
9, the detachable prefabricated assembled Steel-concrete Combined Beam Structures in the present invention, girder steel top flange is folded towards, does
At channel steel formula structure, structure is more stablized.
10, the present invention uses the form of prefabrication and assembly construction, can be replaced after the concrete board bridge floor of combination beam part destroys
Damaged department is not necessarily to integral replacing, to reduce maintenance cost.
Description of the drawings
Fig. 1 is the positive elevational schematic view of detachable prefabricated assembled Steel-concrete Combined Beam Structures.
Fig. 2 is the side elevation schematic diagram of detachable prefabricated assembled Steel-concrete Combined Beam Structures.
Fig. 3 is the vertical view of detachable prefabricated assembled Steel-concrete Combined Beam Structures.
Fig. 4 is the stereogram of girder steel in detachable prefabricated assembled Steel-concrete Combined Beam Structures.
Fig. 5 is the stereogram of beams of concrete in detachable prefabricated assembled Steel-concrete Combined Beam Structures.
Fig. 6 is the stereogram after detachable prefabricated assembled Steel-concrete Combined Beam Structures combination.
In figure：1 precast slab；11 be concrete support；12 be waterproof layer；2 be girder steel；21 be channel steel formula upper limb
Edge；3 be high-strength bolt；31 be hexagonal (hexagon)nut；32 be cushion block；4 be sleeve.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1：Referring to Fig.1~Fig. 6, a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures, including coagulation
Native plate 1, concrete slab support 11, waterproof layer 12, girder steel 2, channel steel formula top flange 21, high-strength bolt 3, hexagonal (hexagon)nut 31, cushion block
32, sleeve 4.Sleeve 4 is arranged in the connecting hole 5 of concrete slab support 11.Waterproof is arranged in 1 both sides lower flange of concrete slab
Layer 12.The preformed hole 6 of the connecting hole 5 of the precast slab 1 and the channel steel formula top flange 21 of the girder steel 2 is carried out pair
Position, splicing.The connection of girder steel and concrete slab is realized by high-strength bolt 3.Cushion block 32 is arranged at high-strength bolt 3.Another place
Bolt completion is screwed with hexagonal (hexagon)nut 31 to fix.
With reference to Fig. 4, preformed hole 6 is done on channel steel formula top flange 21, and girder steel 2 is arranged according to engine request.
With reference to Fig. 5, connecting hole 5 is done in the support 11 of concrete slab 1, wherein arrangement sleeve 4, and with the channel steel of girder steel 2
Spliced formula top flange 21.
A kind of manufacture craft of detachable prefabricated assembled Steel-concrete Combined Beam Structures of embodiment 2, its step are as follows：
The first step, according to engine request, to the channel steel formula top flange of the girder steel, girder steel and the precast slab contact surface into
Row dedusting and processing of rust removing；
Second step arranges girder steel according to engine request direction；
Third walks, and sleeve is arranged in the connecting hole of the bearing of concrete slab；
4th step arranges waterproof layer in concrete slab both sides lower flange；
5th step carries out the connecting hole of the precast slab and the preformed hole of the channel steel formula top flange of the girder steel
Contraposition；
6th step realizes the connection of girder steel and concrete slab by high-strength bolt；
Bolt is screwed completion with hexagonal (hexagon)nut and fixed by the 7th step.
In present example, it is 10m to take spanning diameter, and the wide 300mm of bridge floor, for girder steel 2 using Q345qC, section form is I-shaped
Type, sectional dimension are taken as " 140 × 140 × 12 × 10 ".High-strength bolt 3 selects 10.9 grades of M22 type bolts, according to spacing 200mm
Arrangement.Reserved bore dia is 30mm.Sleeve overall diameter is 30mm.Channel steel formula top flange on girder steel, uses length for 10m,
Height 95mm, wide 10mm.Concrete slab total height is 200mm, beam overall 300mm, overall length 10m, and the long 10m of bearing is high
100mm, wide 120mm.The waterproof layer of concrete slab both sides lower flange, uses length for 10m, is highly 5mm, width 90mm.
The above-mentioned description of this invention is the further utilization and expansion for the ease of the person skilled in the art.It is familiar with this
The personnel of invention field can be the present invention further extension, the present invention is not limited to instant example, any people in the art
Member can carry out extension modification, all modifications all should be within protection scope of the present invention.
Claims (8)
1. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures, which is characterized in that including " I " fonts girder steel, in advance
Concrete slab, concrete slab support and fixing component processed；The top flange of the " I " fonts girder steel is folded up to form channel steel
Formula top flange, the concrete slab support are set to the bottom of prefabricated concrete board, prefabricated concrete board and concrete slab support group
At the mixed mud beam of T-type structure, the mixed mud beam of the T-type structure is embedded in the channel steel formula top flange of girder steel, the concrete
The connecting hole being uniformly arranged in plate support, channel steel formula top flange are equipped with the preformed hole being evenly arranged, the channel steel formula top flange of girder steel
Preformed hole and concrete slab bearing connecting hole contraposition, fixing component passes through preformed hole and connecting hole and realizes concrete
The splicing of beam and girder steel.
2. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 1, which is characterized in that
Concrete slab both sides lower flange is equipped with waterproof layer.
3. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 1, which is characterized in that
The girder steel connect the fixing component used with beams of concrete as bolt, and after bolt passes through preformed hole and connecting hole, other end is used
Hexagonal (hexagon)nut screws fixation, completes the connection of girder steel and beams of concrete.
4. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 3, which is characterized in that
The bolt uses 10.9 grades of M22 types high-strength bolts, 8.8 grades of M20 types high-strength bolts or 10.9 grades of M24 type high-strength bolts.
5. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 1, which is characterized in that
Sleeve is equipped in the connecting hole of the concrete slab bearing.
6. a kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 1, which is characterized in that
The fixing component is equipped with cushion block with contact position on the outside of the preformed hole of girder steel channel steel formula top flange.
7. a kind of manufacture craft of the detachable prefabricated assembled Steel-concrete Combined Beam Structures described in claim 1-6, special
Sign is, includes the following steps：The first step, according to engine request, to the channel steel formula top flange of the girder steel, girder steel with it is described pre-
Concrete slab contact surface processed is dusted and processing of rust removing；
Second step arranges girder steel according to engine request direction；
Third walks, and sleeve is arranged in the connecting hole of the bearing of concrete slab；
4th step arranges waterproof layer in concrete slab both sides lower flange；
5th step carries out the preformed hole of the connecting hole of the precast slab and the channel steel formula top flange of the girder steel pair
Position；
6th step realizes the connection of girder steel and concrete slab by fixing component.
8. a kind of manufacture craft of detachable prefabricated assembled Steel-concrete Combined Beam Structures according to claim 7,
It is characterized in that, the first step, according to engine request, to channel steel formula top flange and the precast slab of the girder steel, girder steel
Contact surface is dusted and processing of rust removing；
Second step arranges girder steel according to engine request direction；
Third walks, and sleeve is arranged in the connecting hole of the bearing of concrete slab；
4th step arranges waterproof layer in concrete slab both sides lower flange；
5th step carries out the preformed hole of the connecting hole of the precast slab and the channel steel formula top flange of the girder steel pair
Position；
6th step realizes the connection of girder steel and concrete slab by high-strength bolt；
Bolt is screwed completion with hexagonal (hexagon)nut and fixed by the 7th step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347233.7A CN108643449A (en) | 2018-04-18 | 2018-04-18 | A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810347233.7A CN108643449A (en) | 2018-04-18 | 2018-04-18 | A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft |
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| CN108643449A true CN108643449A (en) | 2018-10-12 |
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| CN201810347233.7A Pending CN108643449A (en) | 2018-04-18 | 2018-04-18 | A kind of detachably prefabricated assembled Steel-concrete Combined Beam Structures and manufacture craft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629655A (en) * | 2019-10-09 | 2019-12-31 | 广西大学 | Local replaceable plate steel concrete composite beam adopting suspended formwork system |
| CN111395383A (en) * | 2020-03-31 | 2020-07-10 | 上海市机械施工集团有限公司 | Equipment basement roof beam |
| CN112942678A (en) * | 2021-01-26 | 2021-06-11 | 江西龙正科技发展有限公司 | Novel ultra-high strength concrete UHPC light composite beam |
| CN113481815A (en) * | 2021-06-23 | 2021-10-08 | 浙江交通职业技术学院 | Multiple-protection concrete composite bridge and manufacturing method thereof |
| CN117230694A (en) * | 2023-09-20 | 2023-12-15 | 中交公路长大桥建设国家工程研究中心有限公司 | Full-prefabricated detachable assembled steel-concrete composite beam structure and construction method |
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| CN105350445A (en) * | 2015-09-24 | 2016-02-24 | 中交第二航务工程局有限公司 | Novel efficient assembly-type reinforced concrete composite beam |
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| CN208455945U (en) * | 2018-04-18 | 2019-02-01 | 浙江交通职业技术学院 | A kind of detachable prefabricated assembled Steel-concrete Combined Beam Structures |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629655A (en) * | 2019-10-09 | 2019-12-31 | 广西大学 | Local replaceable plate steel concrete composite beam adopting suspended formwork system |
| CN111395383A (en) * | 2020-03-31 | 2020-07-10 | 上海市机械施工集团有限公司 | Equipment basement roof beam |
| CN112942678A (en) * | 2021-01-26 | 2021-06-11 | 江西龙正科技发展有限公司 | Novel ultra-high strength concrete UHPC light composite beam |
| CN113481815A (en) * | 2021-06-23 | 2021-10-08 | 浙江交通职业技术学院 | Multiple-protection concrete composite bridge and manufacturing method thereof |
| CN117230694A (en) * | 2023-09-20 | 2023-12-15 | 中交公路长大桥建设国家工程研究中心有限公司 | Full-prefabricated detachable assembled steel-concrete composite beam structure and construction method |
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