CN204510479U - Reinforced concrete prefabricated assembly - Google Patents
Reinforced concrete prefabricated assembly Download PDFInfo
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- CN204510479U CN204510479U CN201520028392.2U CN201520028392U CN204510479U CN 204510479 U CN204510479 U CN 204510479U CN 201520028392 U CN201520028392 U CN 201520028392U CN 204510479 U CN204510479 U CN 204510479U
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- prefabricated units
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 28
- 238000003032 molecular docking Methods 0.000 claims abstract description 22
- 210000003323 beak Anatomy 0.000 claims description 4
- 239000004567 concrete Substances 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 description 18
- 238000010276 construction Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 13
- 239000008267 milk Substances 0.000 description 9
- 210000004080 milk Anatomy 0.000 description 9
- 235000013336 milk Nutrition 0.000 description 9
- 238000009434 installation Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000011440 grout Substances 0.000 description 5
- 238000009417 prefabrication Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 230000010412 perfusion Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
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- Joining Of Building Structures In Genera (AREA)
Abstract
The utility model discloses a kind of reinforced concrete prefabricated assembly, the second prefabricated units comprising the first prefabricated units and dock with described first prefabricated units; Described first prefabricated units and described second prefabricated units butt end are formed for carrying out the headspace be connected for the embedded bar stretched out from both inside respectively.Owing to defining headspace after two prefabricated units docking, this headspace make embedded bar in two prefabricated units can to comprise sleeve grouting, the multiple steel concrete supporting mode of tapered sleeve locking mode connects, thus makes two prefabricated units can realize connecting by the more mode of being linked and packed.
Description
Technical field
The utility model relates to building, nuclear power field, particularly relates to a kind of reinforced concrete prefabricated assembly.
Background technology
At present, carry forward vigorously in the process of industrialization of construction industry in country, reinforced concrete prefabricated mounting technology has been widely used in urban architecture, reinforced concrete prefabricated mounting technology refer to the beam needed for building, post, floor and shear wall etc. are carried out in the factory prefabricated to form the prefabricated units such as precast beam, prefabricated post, precast floor slab and wallboard, and then by these prefabricated units at the construction field (site) Butt Assembling formed building.The advantage of reinforced concrete prefabricated mounting technology is: save labour, can accelerate speed of application, be conducive to realizing building energy conservation and mechanized construction.Mainly through being embedded in connection between the mechanical connection of the reinforcing bar in prefabricated units and concrete and the assembling that achieves a butt joint between prefabricated units.The mode of steel concrete supporting has multiple, in the prior art, usual employing sleeve entirely/half grouting link technique by the bar connecting in two prefabricated units together, as shown in Figure 1, sleeve link technique of being entirely in the milk refers to and inserts sleeve 300 from the two ends of sleeve 300 (having grouting mouth 301 and plasma discharge mouth 302) respectively by the reinforcing bar 200 of two prefabricated units, then to filling slurry in the gap that reinforcing bar 200 and sleeve 300 are formed, after slurry solidifies, the slurry solidified is connected by frictional force with sleeve 300 inwall and reinforcing bar 200; As shown in Figure 2, sleeve half grouting link technique is inserted from sleeve 300 one end by the reinforcing bar 200 of one of them prefabricated unit and is threaded with sleeve 300, and the reinforcing bar of another prefabricated units inserts from the other end of sleeve 300, then realize being connected with sleeve 300 by above-mentioned grouting way, and then realize the connection of two reinforcing bars 200.For ensureing the position relationship after two prefabricated units installations (such as, prefabricated post and other prefabricated units need after installing to keep vertical) and the facility of constructing, in prior art, as shown in Figure 3, need the docking end face of the prefabricated units 100 of Butt Assembling to be arranged to plane by two, such as the lower surface of prefabricated post is arranged perpendicular to the plane of prefabricated post length direction, the prefabricated units 100 docked with prefabricated post are also arranged to plane at its correspondence position.Although the docking end face of two prefabricated units 100 of Butt Assembling is arranged to the mutual position relationship that plane can ensure two prefabricated units 100, but the structure of this plane docking greatly limit the kind of the connected mode of the reinforcing bar 200 in two prefabricated units 100 because reserve enough spaces cannot to the reinforcing bar 200 in it for reinforcing bar 200 connects, add the complexity of connection, even the connected mode of reinforcing bar 200 is restricted to the mode that sleeve can only be adopted to be in the milk, and when adopting sleeve grouting way, sleeve 300 needs pre-buried in one of them prefabricated unit 100, then be inserted in sleeve 300 by lifting the reinforcing bar 200 making another prefabricated units 100 stretch out butt end, realize connecting by grouting again.
In sum, the mode that prefabricated units employing plane is docked is carried out assembling and is had following defect:
1, prefabricated units adopt the mode of plane docking to connect, fail to the space required for bar connecting pre-buried in it, thus greatly limit the connected mode (welding of common reinforcing bar, be threaded and need other connected modes of certain connection space), and make the connection between reinforcing bar be limited in this kind of mode of sleeve grouting connection.
2, the construction link of sleeve grouting link technique is many, and construction is complicated.
Full grout sleeve connection needs to carry out six procedures such as sleeve, grouting material site acceptance, grouting material preparation, sleeve installation, grouting, grouting rear inspection, grouting material setting and hardening.Half grout sleeve connects the work having needed prefabrication phase and two stages of in-site installation.Need at reinforced concrete member prefabrication phase: sleeve site acceptance, bar cutting blanking, screw thread steel processing, sleeve are installed, sleeve and Template Location, installed seven procedures such as grout pipe, component inspection.Needed at reinforced concrete member erection stage: grouting material site acceptance, connecting portion inspection, lifting component is fixed, point storehouse is prepared with seam shutoff, grouting material, be in the milk be connected, be in the milk seven procedures such as posterior nodal point protection.Half grout sleeve connects totally ten four procedures having needed prefabrication phase and two stages of in-site installation.The sleeve operation connected of being entirely in the milk has seven roads, and sleeve is partly in the milk the prefabricated and operation that connects then nearly 14 roads, and so many operation is to prefabricated and install all totally unfavorable.
3, sleeve grouting link technique material requested, processing and construction cost are high.
The cost that sleeve grouting connects form primarily of four parts: sleeve cost, grouting material cost, screw thread steel processing cost, and sleeve to be in the milk the prefabricated of join dependency and install cost of labor.
4, the construction quality hidden danger of sleeve grouting link technique is many, and after connecting, quality is unknowable.
In prefabricated link: from reinforcing bar cutting stock, screw thread process, sleeve is installed, sleeve is located, grout pipe is installed; arrive fixing link again: connecting portion inspection, connecting sewing shutoff, sleeve and grouting material quality, grouting material preparation, grouting connect, the protection of grouting posterior nodal point; any one link goes wrong; capital has influence on the quality that sleeve grouting connects, thus has influence on the quality of prefabricated assembly structural.In addition, sleeve grouting connects mainly by processing and the control of work progress, once complete connection, its quality of connection cannot detect, and therefore, this kind of technology has higher level to the quality managemant of construction enterprises, construction process control requirement.
In sum, the prefabricated units connected owing to adopting sleeve grouting can not reserve connection requisite space to the steel bar preassembling in it when docking, thus cause adopting other mode connecting reinforcements, finally make the connected mode of reinforcing bar be restricted.
Utility model content
For the technical problem that prefabricated units of the prior art make the connected mode of reinforcing bar limited because installing in the mode of plane, small gap docking, the utility model provides a kind of reinforced concrete prefabricated assembly, and the reinforcing bar in two prefabricated units in this reinforced concrete prefabricated assembly can connect in many ways.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of reinforced concrete prefabricated assembly, the second prefabricated units comprising the first prefabricated units and dock with described first prefabricated units; Described first prefabricated units and described second prefabricated units butt end are formed for carrying out the headspace be connected for the embedded bar stretched out from both inside respectively.
Preferably, the end face of the butt end of described first prefabricated units is provided with the first boss, the outside of described first boss forms described headspace, and the embedded bar of described first prefabricated units and the second prefabricated units all extend out to described headspace.
Preferably, the end face of the butt end of described second prefabricated units is provided with the second boss, described first boss and described second boss docking, the outside of described first boss and described second boss forms described headspace.
Preferably, the butt end of described first prefabricated units and described second prefabricated units is respectively arranged with the first centre of location pipe and the second centre of location pipe, described first centre of location rostrum is for described first prefabricated units and/or described second centre of location rostrum for described second prefabricated units, and the outside after docking with described second centre of location pipe to make described first centre of location pipe forms described headspace.
Preferably, described first centre of location tube portion is embedded in described first prefabricated units, described second centre of location pipe entirety is embedded in described second prefabricated component, the end face of the end face of described second centre of location pipe and the butt end of described second prefabricated units.
Preferably, adjustment pad is provided with between described first boss and described second boss.
Preferably, and the embedded bar of described second prefabricated units is locked by tapered sleeve or sleeve grouting way is connected for the embedded bar of described first prefabricated units.
Compared with prior art, the beneficial effect of reinforced concrete prefabricated assembly of the present utility model is:
1, owing to defining headspace after two prefabricated units docking, this headspace makes embedded bar in two prefabricated units can connect with the various ways comprising sleeve grouting way, thus makes two prefabricated units can realize connecting by the more mode of being linked and packed.
2, because the connected mode of embedded bar is not only limited to sleeve grouting connected mode, thus decrease operation that is prefabricated, construction, improve speed of application, especially in the installation of a large amount of prefabricated panels having vertical embedded bar to connect, post, there is more obvious advantage.
3, from material, artificial and management, cost that is prefabricated, construction is all reduced.
4, due to the existence of headspace, the convenience of the connection of two embedded bars, the controllability of quality of connection are improved, thus improve construction quality, guarantee that overall structure safely, reliably.
Accompanying drawing explanation
Fig. 1 is the structural representation of the full grouting reinforcement mechanical connecting joint of sleeve;
Fig. 2 is the structural representation of sleeve half grouting reinforcement mechanical connecting joint;
Fig. 3 is the structural representation that two prefabricated components of prior art adopt sleeve half grouting to connect;
The structural representation that the reinforced concrete prefabricated assembly (the first prefabricated units up) that Fig. 4 provides for a preferred embodiment of the present utility model docks;
The structural representation that the reinforced concrete prefabricated assembly (the first prefabricated units up) that Fig. 5 provides for another preferred embodiment of the present utility model docks;
The structural representation of the reinforced concrete prefabricated assembly docking that Fig. 6 provides for another preferred embodiment of the present utility model;
The structural representation of the reinforced concrete prefabricated assembly docking that Fig. 7 provides for another preferred embodiment of the present utility model;
Fig. 8 is the decomposition texture schematic diagram of the first centre of location pipe and the second centre of location pipe;
Fig. 9 is the view after two prefabricated component concrete perfusions of a preferred embodiment of the present utility model;
Figure 10 is the view after two prefabricated component concrete perfusions of another preferred embodiment of the present utility model.
In figure: 1-first prefabricated units; 11-first boss; 2-second prefabricated units; 21-second boss; 3-connector; 4-adjusts pad; 5-embedded bar; 6-first centre of location pipe; 61-second step face; 7-second centre of location pipe; 8-headspace; 9-First terrace.
Detailed description of the invention
For making those skilled in the art better understand the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in figs. 4 and 7, the utility model provides a kind of reinforced concrete prefabricated assembly, the second prefabricated units 2 that this precast segment comprises the first prefabricated units 1 and docks with the first prefabricated units 1; First prefabricated units 1 and the second prefabricated units 2 butt end are formed and are used for supplying the embedded bar 5 stretched out from both inside respectively to carry out the headspace 8 be connected.
Should be noted that: when two prefabricated units (two embedded bars 5 described above) connect, no matter it is direct connection (as directly connected by welding), or indirectly connect (as the connector 3 by pipe box class connects, usually need to be that two prefabricated units reserve certain space so that two prefabricated units connect with certain connected mode by operator, such as, if above-mentioned embedded bar 5 connects with welding manner, need between two prefabricated units at least to reserve and welding gun can be made to stretch into and the space contacting the junction of two embedded bars 5, and for example, if embedded bar 5 is connected by connector 3, need at least to reserve the operating space that connector 3 can be made to be arranged on space between embedded bar 5 and fastening means between two prefabricated units.
The utility model improves just for these reasons and to the structure of the butt end of two prefabricated units of docking mutually, to make the embedded bar 5 of two prefabricated units connect with the more multimode comprising sleeve grouting connected mode.
The structure that the first prefabricated units 1 and the docking of the second prefabricated units 2 can be made to form headspace can have multiple, as shown in Figure 4 and Figure 5, in a preferred embodiment of the present utility model, the end face of the butt end of the first prefabricated units 1 is provided with the first boss 11, after this first boss 11 docks with the end face of the second prefabricated units 2 butt end, headspace 8 is formed in the outside of the first boss 11, the embedded bar 5 of the first prefabricated units 1 from the first boss 11 with dock the First terrace 9 that end face formed and stretch to headspace 8, the embedded bar 5 of the second prefabricated units 2 stretches into headspace from the end face of its butt end, and it is relative with the embedded bar 5 of the first prefabricated units 1.In the present embodiment, first prefabricated units 1 are docked with the second prefabricated units 2 by the first boss 11, define the first prefabricated units 1 and the embedded bar 5 of the second prefabricated units 2 can be facilitated directly to be connected (as: welding) or indirectly connect the headspace 8 of (as: being connected by connector 3) in the outside of the first boss 11.
As shown in Figure 6, in another preferred embodiment of the present utility model, except arranging except the first boss 11 on the end face of the butt end of the first prefabricated units 1, also on the end face of the butt end of the second prefabricated units 2, be provided with the second boss 21, first boss 11 of the first prefabricated units 1 and the second boss 21 of the second prefabricated units 2 dock, now, the outside of the first boss 11 and the second boss 21 forms headspace 8, the First terrace 9 that the embedded bar 5 of the first prefabricated units 1 and the embedded bar 5 of the second prefabricated units 2 are formed from the end face of its butt end and boss respectively extend out to headspace 8.
In above-mentioned two embodiments, the mode that headspace 8 is formed is substantially identical, and this headspace is actually the annular space formed owing to there is the first boss 11 and/or the second boss 21.
This first boss 11 and the second boss 21 can in the prefabrication process of the first prefabricated units 1 and the second prefabricated units 2 with the first prefabricated units 1 and the second prefabricated units 2 one-body molded, that is the material of boss is identical with the material of prefabricated units, can make by concrete.
For distance or the position relationship (as: verticality of the first prefabricated units 1 and the second prefabricated units 2) of the first prefabricated units 1 and the second prefabricated units 2 can be adjusted, be provided with between the first boss 11 and the second boss 21 and adjust pad 4.
As shown in Figure 7, in another preferred embodiment of the present utility model, the butt end of the first prefabricated units 1 and the second prefabricated units 2 is respectively arranged with the first centre of location pipe 6 and the second centre of location pipe 7, and the first centre of location pipe 6 protrudes from the first prefabricated units 1 (can certainly simultaneously or only make the second centre of location pipe 7 protrude from the second prefabricated units 2), the embedded bar 5 of the first prefabricated units 1 and the second prefabricated units 2 stretches out from the end face of the butt end of two prefabricated units in the outside of the first centre of location pipe 6 and the second centre of location pipe 7 respectively, the end of the first centre of location pipe 6 is formed with second step face 61, first centre of location pipe 6 inserts in the second centre of location pipe 7, and the end face of second step face 61 and the second centre of location pipe 7 against.So, the first centre of location pipe 6 and the second centre of location pipe 7 by second step face 61 against mode dock after, keep at a certain distance away between the second step face 61 of the first prefabricated units 1 and the butt end of the second prefabricated units 2, thus form headspace 8.This first centre of location pipe 6 and the second centre of location pipe 7 not only make to form headspace 8 between the first prefabricated units 1 and the second prefabricated units 2, and when making the first prefabricated units 1 dock with the second prefabricated units 2 with lifting mode, the effect of location centering can be played, thus improve the installation accuracy of the first prefabricated units 1 and the second prefabricated units 2.
First centre of location pipe 6 and the second centre of location pipe 7 are owing to carrying the overall weight of the first prefabricated units 1 or the second prefabricated units 2, the higher metal material of strength and stiffness can be adopted to make, and, as shown in Figure 7, first centre of location pipe 6 can be fixedly connected with the first prefabricated units 1 or the second prefabricated units 2 in pre-buried mode with the second centre of location pipe 7, particularly, first centre of location pipe 6 part is embedded in the first prefabricated units 1, second centre of location pipe 7 entirety is embedded in the second prefabricated component, the end face of the end face of the second centre of location pipe 7 and the butt end of the second prefabricated units 2.
The structure of above-mentioned two prefabricated units joints does not stop embedded bar 5 to connect with sleeve grouting way, on the contrary, the headspace 8 that two prefabricated units docking places are formed makes sleeve without the need to being embedded in prefabricated units as in the prior art, and only needs exposed in headspace.So, facilitate two embedded bars 5 to insert from sleeve two ends, and be in the milk.Therefore, for the docking structure of prefabricated units of the prior art, the construction of the connected mode that the docking structure of two prefabricated units of reinforced concrete prefabricated assembly of the present utility model can make sleeve be in the milk is quicker.
The mode that the embedded bar 5 of above-mentioned two prefabricated units is also locked by tapered sleeve of the prior art connects.
The utility model also comprises a kind of mounting method of reinforced concrete prefabricated assembly, and it comprises the steps:
1, many groups prefabricated units with boss or centralized positioning pipe are precast in factory for prefabrication;
2, two prefabricated units adopting the mode of lifting to dock at the construction field (site) carry out contraposition, if two prefabricated units all have boss, make both boss relative, and between two boss, place adjustment pad 4, if two prefabricated units only have one to have boss, another butt end is plane, make boss relative with the middle part of plane, and between plane and boss, place adjustment pad 4, if two prefabricated units are respectively arranged with centre of location pipe, by two centre of location pipe grafting;
3, prefabricated units are fixed by support bar (if prefabricated units are prefabricated panel, the side direction they sup-port of prefabricated panel), scaffold (if prefabricated units are prefabricated post, being fixed with scaffold) or other modes;
4, the embedded bar 5 of the prefabricated units of two docking is connected with sleeve grouting way or other modes;
5, as shown in Figure 9 and Figure 10, two prefabricated units are docked gap (comprising the headspace 8 that the docking is formed) concrete perfusion and base joint grouting glue that are formed, maintenance concrete is also until concrete setting is intact.
From the above, the advantage that reinforced concrete prefabricated assembly of the present utility model has is:
1, owing to defining headspace after two prefabricated units docking, this headspace makes the embedded bar 5 in two prefabricated units connect with the various ways comprising sleeve grouting way, thus is that two prefabricated units provide more connected mode.
2, because the connected mode of embedded bar 5 is not only limited to sleeve grouting connected mode, thus decrease operation that is prefabricated, construction, improve speed of application, especially in the installation of a large amount of prefabricated panels having vertical embedded bar 5 to connect, post, there is more obvious advantage.
3, from material, artificial and management, cost that is prefabricated, construction is all reduced.
4, due to the existence of headspace, the convenience of connection, the controllability of quality of connection of two embedded bars 5 are improved, thus effectively can control construction quality, guarantee that overall structure safely, reliably.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can in essence of the present utility model and protection domain, and make various amendment or equivalent replacement to the utility model, this amendment or equivalent replacement also should be considered as dropping in protection domain of the present utility model.
Claims (7)
1. a reinforced concrete prefabricated assembly, is characterized in that, the second prefabricated units comprising the first prefabricated units and dock with described first prefabricated units; Described first prefabricated units and described second prefabricated units butt end are formed for carrying out the headspace be connected for the embedded bar stretched out from both inside respectively.
2. reinforced concrete prefabricated assembly according to claim 1, it is characterized in that, the end face of the butt end of described first prefabricated units is provided with the first boss, the outside of described first boss forms described headspace, and the embedded bar of described first prefabricated units and the second prefabricated units all extend out to described headspace.
3. reinforced concrete prefabricated assembly according to claim 2, it is characterized in that, the end face of the butt end of described second prefabricated units is provided with the second boss, and described first boss and described second boss docking, the outside of described first boss and described second boss forms described headspace.
4. reinforced concrete prefabricated assembly according to claim 1, it is characterized in that, the butt end of described first prefabricated units and described second prefabricated units is respectively arranged with the first centre of location pipe and the second centre of location pipe, described first centre of location rostrum is for described first prefabricated units and/or described second centre of location rostrum for described second prefabricated units, and the outside after docking with described second centre of location pipe to make described first centre of location pipe forms described headspace.
5. reinforced concrete prefabricated assembly according to claim 4, it is characterized in that, described first centre of location tube portion is embedded in described first prefabricated units, described second centre of location pipe entirety is embedded in described second prefabricated component, the end face of the end face of described second centre of location pipe and the butt end of described second prefabricated units.
6. reinforced concrete prefabricated assembly according to claim 3, is characterized in that, is provided with adjustment pad between described first boss and described second boss.
7. according to the reinforced concrete prefabricated assembly in claim 1-6 described in any one, it is characterized in that, the embedded bar of described first prefabricated units and the embedded bar of described second prefabricated units are locked by tapered sleeve or sleeve grouting way is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520028392.2U CN204510479U (en) | 2015-01-15 | 2015-01-15 | Reinforced concrete prefabricated assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520028392.2U CN204510479U (en) | 2015-01-15 | 2015-01-15 | Reinforced concrete prefabricated assembly |
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| CN204510479U true CN204510479U (en) | 2015-07-29 |
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| CN201520028392.2U Expired - Fee Related CN204510479U (en) | 2015-01-15 | 2015-01-15 | Reinforced concrete prefabricated assembly |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563299A (en) * | 2015-01-15 | 2015-04-29 | 建研科技股份有限公司 | reinforced concrete prefabricated component and mounting method |
| CN109898749A (en) * | 2019-04-12 | 2019-06-18 | 上海宝冶集团有限公司 | A kind of reinforcing steel bar connecting device and its construction method |
| CN110145096A (en) * | 2019-05-31 | 2019-08-20 | 韦伯电梯有限公司 | A kind of modularization hoistway installing elevator additional |
| CN112726868A (en) * | 2020-12-24 | 2021-04-30 | 河北建工建筑装配股份有限公司 | Vertical connected node of unit-installment shear force wall |
-
2015
- 2015-01-15 CN CN201520028392.2U patent/CN204510479U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563299A (en) * | 2015-01-15 | 2015-04-29 | 建研科技股份有限公司 | reinforced concrete prefabricated component and mounting method |
| CN109898749A (en) * | 2019-04-12 | 2019-06-18 | 上海宝冶集团有限公司 | A kind of reinforcing steel bar connecting device and its construction method |
| CN110145096A (en) * | 2019-05-31 | 2019-08-20 | 韦伯电梯有限公司 | A kind of modularization hoistway installing elevator additional |
| CN112726868A (en) * | 2020-12-24 | 2021-04-30 | 河北建工建筑装配股份有限公司 | Vertical connected node of unit-installment shear force wall |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20220115 |