CN110439180A - A kind of cross coupling and construction method - Google Patents
A kind of cross coupling and construction method Download PDFInfo
- Publication number
- CN110439180A CN110439180A CN201910770788.7A CN201910770788A CN110439180A CN 110439180 A CN110439180 A CN 110439180A CN 201910770788 A CN201910770788 A CN 201910770788A CN 110439180 A CN110439180 A CN 110439180A
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- secondary beam
- precast main
- main beam
- slot
- girder
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- 238000006880 cross-coupling reaction Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 18
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 108010068370 Glutens Proteins 0.000 claims description 24
- 235000021312 gluten Nutrition 0.000 claims description 24
- 210000003205 muscle Anatomy 0.000 claims description 23
- 238000011065 in-situ storage Methods 0.000 claims description 22
- 238000004873 anchoring Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- 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
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of cross coupling and construction methods, the cross coupling includes precast main beam, the top surface of the precast main beam offers through slot, the through slot is opened up along the width direction of the precast main beam, the through slot is equipped with prefabricated secondary beam, the prefabricated secondary beam and precast main beam arranged crosswise along the one or both ends of precast main beam width direction；The two side walls of the through slot and the prefabricated secondary beam end face opposite with through slot lateral openings are enclosed casting space, and concrete has been poured in the casting space to connect to form intersection construction precast main beam with prefabricated secondary beam.Precast main beam and prefabricated secondary beam are fixed using wet connection mode as a result, and the bond strength and load ability of junction greatly improve, and cracking risk substantially reduces in cross coupling use process.Also, cross coupling assembly construction is convenient, and the production of universal architecture beam mould can be used in secondary beam, and high production efficiency is at low cost.
Description
Technical field
The invention belongs to building structural member technical field more particularly to a kind of cross coupling and construction methods.
Background technique
Due to formwork complexity, big, the transport inconvenience of prefabricated construction operation difficulty etc., cross coupling is generally unsatisfactory for whole pre-
System, can only be cast-in-place.But cast-in-place to need a large amount of manpower and material resources, long construction period does not meet energy-saving and environment friendly principle.
CN201510875125.3 discloses a kind of mortise and tenon type concrete composite beam cross connecting structure, including female Liang Jigong
Beam, in being reserved with tongue-and-groove on female beam, the both ends of public beam are separately formed the tenon extended along its ontology, in female symmetrical cloth in beam two sides
The tenon for the public beam set is respectively connected to constitute criss-cross construction, the top surface cast-in-situ steel reinforced concrete of criss-cross construction in tongue-and-groove
Layer.On the one hand, the public beam mould with tenon designs complicated, and plant produced is difficult and production cost is higher.On the other hand, due to existing
Layer male beam below to be poured to be connected with mother Liang Caiyong overlap joint combination, male beam and female beam junction only have in-situ layer load, once
In-situ layer cracking, then entire cross coupling is scrapped.Even if male beam and female beam are fixed using dry connection types such as bolts by lap-joint,
This structure also easily cracks in later period use process since junction bonding strength is low.Also, male beam and female beam junction
Gap need to block, influence beauty.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of production and convenient and energy of constructing
Junction cracking risk is enough reduced, the cross coupling improved service life correspondingly provides the construction method of the cross coupling.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of cross coupling, including precast main beam, the top surface of the precast main beam offer through slot, and the through slot is along described pre-
The width direction of girder processed opens up, and the through slot is equipped with prefabricated secondary beam along the one or both ends of precast main beam width direction, described
Prefabricated secondary beam and precast main beam arranged crosswise；The two side walls of the through slot and prefabricated secondary beam are opposite with through slot lateral openings
End face be enclosed casting space, concrete has been poured in the casting space to connecting precast main beam with prefabricated secondary beam
Form intersection construction.
Precast main beam and prefabricated secondary beam are fixed using wet connection mode as a result, the bond strength and load ability of junction
It greatly improves, cracking risk substantially reduces in cross coupling use process.
Also, the production of universal architecture beam mould can be used in secondary beam, and high production efficiency is at low cost.
As a further improvement of the above technical scheme:
For the integrated connection intensity for further increasing cross coupling, the top surface of the intersection construction has poured in-situ layer.
For the overall structural strength for further increasing cross coupling, it is embedded in the precast main beam multiple long along precast main beam
The spaced apart girder stirrup in direction is spent, is embedded in the prefabricated secondary beam multiple spaced apart along prefabricated secondary beam length direction
Secondary beam stirrup, the girder stirrup and time beam stirrup are vertically arranged, and the top of the girder stirrup and time beam stirrup is protruded into
In the in-situ layer.
For the overall structural strength for further increasing cross coupling, be equipped with steel mesh in the in-situ layer, the steel mesh by
Girder gluten and secondary beam gluten are staggeredly constituted, and the girder gluten is arranged along the length direction of the precast main beam, the secondary beam
Gluten is arranged along the length direction of the prefabricated secondary beam；The top hoop of the girder stirrup is described in the outside of girder gluten
The top hoop of secondary beam stirrup is in the outside of secondary beam gluten.
To improve the bonding strength at precast main beam through slot, precast main beam is avoided to crack in transport and hoisting process, institute
The girder bottom muscle being embedded in precast main beam along precast main beam length direction arrangement is stated, girder bottom muscle is located at the through slot
Lower section, the bottom hoop of the girder stirrup is in the outside of girder bottom muscle.
For the structural strength for improving cross coupling junction, the prefabricated secondary beam is set on the end face opposite with through slot lateral openings
There is the anchoring piece protruded into the through slot.
The secondary beam bottom muscle along prefabricated secondary beam length direction arrangement, the bottom of the secondary beam stirrup are embedded in the prefabricated secondary beam
Portion's hoop is in the outside of the secondary beam bottom muscle；The secondary beam bottom muscle towards one end of the through slot stretch out outside the prefabricated secondary beam from
And form the anchoring piece.
The anchoring piece extend towards through slot after again upward bending to forming bend reinforcement.
Concrete structure in the casting space is an integral molding structure with the in-situ layer.
The precast main beam is equipped with more, and more precast main beams are parallel and interval setting, adjacent two precast main beams pass through
The prefabricated secondary beam is connected.
The inventive concept total as one, the present invention also provides a kind of construction method of above-mentioned cross coupling, including it is following
Step:
S1: precast main beam and prefabricated secondary beam are lifted to corresponding installation site, to form casting space；
S2: toward casting space casting concrete, so that precast main beam be connected to form intersection construction with prefabricated secondary beam.
As a further improvement of the above technical scheme:
Before the step S2 further include:
In the top surface in-situ layer mould of precast main beam and prefabricated secondary beam；The step S2 further include: poured into in-situ layer mould
Concrete.
Before the step S1 further include: connected the precast main beam section of the through slot two sides using connector；The step
Rapid S1 further include: precast main beam is lifted to corresponding installation site, connector is removed.
The precast main beam section of the through slot two sides is connected using connector, can avoid precast main beam transport and hoisting process
Linkage section cracking below middle groove.
The connector includes the pre- reinforcing bar being embedded in the precast main beam, and the reinforcing bar runs through two sides of the through slot
Wall.After precast main beam lifting in place, the reinforcing bar in through slot is wiped out.
The connector further includes connecting plate, and the connecting plate is set at least one of the precast main beam in the width direction
On side.After precast main beam lifting in place, connecting plate is removed.
To avoid damage to the overall structure after precast main beam pours, precast main beam side corresponding with the connecting plate
On be embedded with sleeve group, the sleeve group includes two sleeves, and two sleeves are divided into through slot along precast main beam length direction
Two sides, the connecting plate and two sleeves are bolted.
The sleeve group is equipped with multiple groups, and multiple groups sleeve group is distributed from top to bottom.
The connecting plate is equipped with multiple, multiple connecting plates and multiple groups sleeve group one-to-one correspondence.
Compared with the prior art, the advantages of the present invention are as follows:
1, in the present invention, precast main beam and prefabricated secondary beam are fixed using wet connection mode, the bond strength of junction and are held
Power ability greatly improves, and cracking risk substantially reduces in cross coupling use process.
2, the present invention successfully solves the problems, such as that intersection secondary beam cannot be prefabricated, and the production of universal architecture beam mould can be used in secondary beam,
High production efficiency, it is at low cost.And installation is convenient, saves artificial and material, the duration is greatly saved, meets green energy conservation
The principle of environmental protection.
3, the precast main beam section of through slot two sides is connected using connector before precast main beam lifting, can avoid precast main beam fortune
Linkage section cracking below defeated and hoisting process middle groove.
Detailed description of the invention
Fig. 1 is the structural schematic diagram before the cross coupling assembly of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram (not pouring in-situ layer) after the cross coupling assembly of the embodiment of the present invention.
Fig. 3 is the main view sectional view of the cross coupling junction of the embodiment of the present invention.
Fig. 4 is the lateral sectional view of the cross coupling junction of the embodiment of the present invention.
Marginal data: 1, precast main beam；11, through slot；12, girder stirrup；13, girder gluten；14, girder bottom muscle；15, main
Beam construction reinforcing bar；2, prefabricated secondary beam；21, end face；22, secondary beam stirrup；23, secondary beam gluten；24, secondary beam bottom muscle；25, anchoring piece；
26, secondary beam distributing bar；3, casting space；4, in-situ layer；5, sleeve；6, connecting plate；7, bolt.
Specific embodiment
Below in conjunction with specific preferred embodiment, the invention will be further described, but not thereby limiting the invention
Protection scope.
Embodiment 1:
As Figure 1-Figure 4, the cross coupling of the present embodiment, including precast main beam 1 and two prefabricated secondary beams 2.
The top surface of precast main beam 1 offers through slot 11, and through slot 11 is opened up along the width direction of precast main beam 1.Precast main beam 1
In be embedded with multiple along the spaced apart girder stirrup 12 of 1 length direction of precast main beam, girder stirrup 12 is vertically arranged and top
It stretches out outside precast main beam 1.In addition, multiple groups girder distributing bar group is also embedded in precast main beam 1, multiple groups girder distributing bar group
It arranges from top to bottom, every group of girder distributing bar group is by more along the spaced apart girder construction steel of 1 width direction of precast main beam
Muscle 15 forms, girder distributing bar 15 extend along the length direction of precast main beam 1 and through precast main beam 1 along its length
Two end faces.The girder distributing bar of the bottom is main beam bottom muscle 14, and girder bottom muscle 14 is located at the lower section of through slot 11, girder stirrup
12 bottom hoop in girder bottom muscle 14 outside and bind or be welded and fixed.Remaining each reinforcing bar and girder stirrup 12 bind or weld
Connect fixation.
As shown in Figure 1, two sides of precast main beam 1 in the width direction are embedded with multiple groups sleeve group, every group of sleeve group
Including two sleeves 5, two sleeves 5 are divided into the two sides of through slot 11, and multiple groups sleeve group is distributed from top to bottom.
Before cross coupling assembly, for the linkage section cracking for avoiding 11 lower section of the transport of precast main beam 1 and hoisting process middle groove, adopt
With the precast main beam section of 11 two sides of through slot is connect by multiple connecting plates 6 correspondingly with multiple groups sleeve group, connecting plate 6 uses steel
Plate, connecting plate 6 set bolt 7 along the both ends of 1 length direction of precast main beam, and bolt 7 is connected and fixed with corresponding sleeve 5.In addition, logical
Reinforcing bar in slot 11 also functions to connection function.
Two prefabricated secondary beams 2 are divided into through slot 11 along the both ends of 1 width direction of precast main beam and are oppositely arranged, prefabricated secondary beam
2 with 1 arranged crosswise of precast main beam.It is embedded in prefabricated secondary beam 2 multiple along the prefabricated spaced apart secondary beam hoop of 2 length direction of secondary beam
Muscle 22, secondary beam stirrup 22 is vertically arranged and top is stretched out outside prefabricated secondary beam 2.In addition, being also embedded with multiple groups secondary beam in prefabricated secondary beam 2
Distributing bar group, multiple groups secondary beam distributing bar group arrange that every group of secondary beam distributing bar group is by more along prefabricated secondary beam 2 from top to bottom
The spaced apart secondary beam distributing bar 26 of width direction forms, and secondary beam distributing bar 26 is arranged along the length direction of prefabricated secondary beam 2.
The secondary beam distributing bar of the bottom is time beam bottom muscle 24, and the bottom hoop of secondary beam stirrup 22 is in the outside of secondary beam bottom muscle 24；Secondary beam
Bottom muscle 24 stretches out outside prefabricated secondary beam 2 towards one end of through slot 11 to form anchoring piece 25.Anchoring piece 25 extends towards through slot 11
Afterwards again upward bending to forming bend reinforcement.
As shown in Fig. 2, the opposite both ends of the surface 21 of two prefabricated secondary beams 2 close two lateral openings of through slot 11, anchoring
Part 25 protrudes into through slot 11.The end face 21 of the two side walls of through slot 11 and two prefabricated secondary beams 2 is enclosed casting space 3.It pours
It builds and has poured concrete in space 3 to which precast main beam 1 and the connection of prefabricated secondary beam 2 are formed intersection construction.
As shown in Figures 3 and 4, the top surface of intersection construction has poured in-situ layer 4, the top of girder stirrup 12 and time beam stirrup 22
It protrudes into in-situ layer 4.Steel mesh is equipped in in-situ layer 4, steel mesh is staggeredly made of girder gluten 13 and secondary beam gluten 23, main
Beam gluten 13 arranges that secondary beam gluten 23 is arranged along the length direction of prefabricated secondary beam 2 along the length direction of precast main beam 1；Girder hoop
The top hoop of muscle 12 is in the outside of girder gluten 13, and the top hoop of secondary beam stirrup 22 is in the outside of secondary beam gluten 23.
Wherein, the concrete structure in casting space 3 is an integral molding structure with in-situ layer 4.
The prefabricated of the cross coupling of the present embodiment, assembly and construction method are as follows:
S1: precast main beam 1 and prefabricated secondary beam 2 are prefabricated in the factory.And embedded sleeve barrel 5 in 1 prefabrication process of precast main beam, in advance
The precast main beam section of 11 two sides of through slot is connected and fixed with connecting plate 6 after system.
S2: by precast main beam 1 and prefabricated secondary beam 2 toward building-site assembly, first the precast main beam 1 of through slot 11 has been opened in lifting,
The connecting plate 6 at 1 through slot 11 of precast main beam is removed after the lifting to corresponding installation site of precast main beam 1, and is wiped out in through slot 11
Girder distributing bar 15 (to show girder distributing bar 15, Fig. 4 retains girder distributing bar 15；It is cut during practice of construction
Except), then hoisting prefabricated secondary beam 2 is to corresponding installation site, to form casting space 3.
S3: installing in-situ layer mould and carry out reinforcing bar binding, specifically, binds girder stirrup 12 and girder gluten 13, binding
Secondary beam stirrup 22 and secondary beam gluten 23, and bind girder gluten 13 and secondary beam gluten 23；
S4: casting concrete is whole to make precast main beam 1 and prefabricated secondary beam 2 be linked to be in casting space 3 and in-situ layer mould
Body.
The above is only the preferred embodiment of the application, not does any type of limitation to the application, although this Shen
Please disclosed as above with preferred embodiment, however not to limit the application, any person skilled in the art is not taking off
In the range of technical scheme, a little variation or modification are made using the technology contents of the disclosure above and is equal to
Case study on implementation is imitated, is belonged in technical proposal scope.
Claims (10)
1. the top surface of a kind of cross coupling, including precast main beam (1), the precast main beam (1) offers through slot (11), the through slot
(11) width direction along the precast main beam (1) opens up, which is characterized in that the through slot (11) is along precast main beam (1) width
The one or both ends in direction are equipped with prefabricated secondary beam (2), the prefabricated secondary beam (2) and precast main beam (1) arranged crosswise；The through slot
(11) two side walls and prefabricated secondary beam (2) end face (21) opposite with through slot (11) lateral openings, which is enclosed, pours sky
Between (3), concrete has been poured in the casting space (3) to which precast main beam (1) and prefabricated secondary beam (2) connection are formed intersection
Structure.
2. cross coupling according to claim 1, which is characterized in that the top surface of the intersection construction has poured in-situ layer (4).
3. cross coupling according to claim 2, which is characterized in that be embedded in the precast main beam (1) multiple along prefabricated
The spaced apart girder stirrup (12) of girder (1) length direction is embedded in the prefabricated secondary beam (2) multiple along prefabricated secondary beam
(2) the spaced apart secondary beam stirrup (22) of length direction, the girder stirrup (12) and time beam stirrup (22) are vertically arranged, institute
The top for stating girder stirrup (12) and time beam stirrup (22) is protruded into the in-situ layer (4).
4. cross coupling according to claim 3, which is characterized in that be equipped with steel mesh, the reinforcing bar in the in-situ layer (4)
Net is staggeredly made of girder gluten (13) and secondary beam gluten (23), length of the girder gluten (13) along the precast main beam (1)
Direction arrangement is spent, the secondary beam gluten (23) is arranged along the length direction of the prefabricated secondary beam (2)；The girder stirrup (12)
Top hoop is in the outside of girder gluten (13), and the top hoop of the secondary beam stirrup (22) is in the outside of secondary beam gluten (23).
5. cross coupling according to claim 4, which is characterized in that be embedded in the precast main beam (1) along precast main beam
(1) the girder bottom muscle (14) of length direction arrangement, girder bottom muscle (14) are located at the lower section of the through slot (11), the girder
The bottom hoop of stirrup (12) is in the outside of girder bottom muscle (14).
6. according to the described in any item cross couplings of claim 3-5, which is characterized in that the prefabricated secondary beam (2) and through slot (11)
The opposite end face of lateral openings (21) is equipped with the anchoring piece (25) protruded into the through slot (11).
7. cross coupling according to claim 6, which is characterized in that be embedded in the prefabricated secondary beam (2) along prefabricated secondary beam
(2) the secondary beam bottom muscle (24) of length direction arrangement, the bottom hoop of the secondary beam stirrup (22) is in the secondary beam bottom muscle (24)
Outside；The secondary beam bottom muscle (24) stretches out the prefabricated secondary beam (2) outside to described in formation towards one end of the through slot (11)
Anchoring piece (25).
8. a kind of construction method of such as described in any item cross couplings of claim 1-7, comprising the following steps:
S1: by precast main beam (1) and prefabricated secondary beam (2) lifting to corresponding installation site, to form casting space (3)；
S2: toward casting space (3) casting concrete, so that precast main beam (1) and prefabricated secondary beam (2) connection are formed cross knot
Structure.
9. the construction method of cross coupling according to claim 8, which is characterized in that before the step S2 further include:
In the top surface in-situ layer mould of precast main beam (1) and prefabricated secondary beam (2)；The step S2 further include: poured into in-situ layer mould
Build concrete.
10. the construction method of cross coupling according to claim 8 or claim 9, which is characterized in that also wrapped before the step S1
It includes: being connected the precast main beam section of the through slot (11) two sides using connector；The step S1 further include: by precast main beam
(1) after lifting to corresponding installation site, connector is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770788.7A CN110439180A (en) | 2019-08-20 | 2019-08-20 | A kind of cross coupling and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770788.7A CN110439180A (en) | 2019-08-20 | 2019-08-20 | A kind of cross coupling and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN110439180A true CN110439180A (en) | 2019-11-12 |
Family
ID=68436726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770788.7A Pending CN110439180A (en) | 2019-08-20 | 2019-08-20 | A kind of cross coupling and construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110439180A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411746A (en) * | 2020-11-27 | 2021-02-26 | 湖南建工五建建筑工业化有限公司 | Primary and secondary beam cross lap joint structure and connection method thereof |
| CN114541576A (en) * | 2022-02-16 | 2022-05-27 | 浙江大学建筑设计研究院有限公司 | Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method |
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| JPH0642039A (en) * | 1992-07-21 | 1994-02-15 | Takenaka Komuten Co Ltd | Joining method of end of precast concrete beam to precast concrete girder, and joining construction thereof |
| JPH09177240A (en) * | 1995-12-27 | 1997-07-08 | Fujita Corp | Precast ferro-concrete beam and its installing method |
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| DE4235521A1 (en) * | 1991-10-25 | 1993-04-29 | Fudo Construction Co | Prefabricated concrete bearer and bearer layer - involve long concrete section, the length of which corresponds to distance between two buttresses and short concrete sections whose length is shorter than half the distance between buttresses |
| JPH05179696A (en) * | 1991-10-31 | 1993-07-20 | Penta Ocean Constr Co Ltd | Precast concrete beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411746A (en) * | 2020-11-27 | 2021-02-26 | 湖南建工五建建筑工业化有限公司 | Primary and secondary beam cross lap joint structure and connection method thereof |
| CN114541576A (en) * | 2022-02-16 | 2022-05-27 | 浙江大学建筑设计研究院有限公司 | Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method |
| CN114541576B (en) * | 2022-02-16 | 2024-07-02 | 浙江大学建筑设计研究院有限公司 | Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method |
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Application publication date: 20191112 |
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| RJ01 | Rejection of invention patent application after publication |