CN203701435U - Composite connection joint for grouting connection and compression connection - Google Patents
Composite connection joint for grouting connection and compression connection Download PDFInfo
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- CN203701435U CN203701435U CN201320882809.2U CN201320882809U CN203701435U CN 203701435 U CN203701435 U CN 203701435U CN 201320882809 U CN201320882809 U CN 201320882809U CN 203701435 U CN203701435 U CN 203701435U
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- grouting
- connector
- crimping
- link
- connection
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- Expired - Lifetime
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 230000006835 compression Effects 0.000 title abstract 8
- 238000007906 compression Methods 0.000 title abstract 8
- 230000002787 reinforcement Effects 0.000 claims abstract description 63
- 239000011083 cement mortar Substances 0.000 claims abstract description 16
- 238000002788 crimping Methods 0.000 claims description 87
- 230000003014 reinforcing effect Effects 0.000 claims description 38
- 239000008267 milk Substances 0.000 claims description 8
- 210000004080 milk Anatomy 0.000 claims description 8
- 235000013336 milk Nutrition 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to a composite connection joint for grouting connection and compression connection. The joint comprises two connection steel reinforcements, a connector and cement mortar, wherein one end of the connector is a compression connection end, one connection steel reinforcement is inserted into the compression connection end, and the other end of the connector is a grouting connection end which is provided with a grouting cavity in which a cavity inner groove and/or a cavity inner convex rib are arranged; the other connection steel reinforcement is inserted into the grouting cavity and combined with the connector by non-shrinking cement mortar filled in the gap between both to form a connection body; by squeezing the compression connection end, the connector and a transverse rib or a specially-machined concave-convex part at the end part of the connection steel reinforcement of the compression connection end are meshed to be connected together. By virtue of the joint, the compression connection end of the connector and one end of the connection steel reinforcement are subjected to compression connection and then grouting connection, not only can the connection quality be good, but also the cost of the joint is low.
Description
Technical field
The utility model relates to a kind of steel bar connector being applied in prefabricated concrete structure, and this joint is better than existing cement grouting steel bar joint at aspects such as structure, material consumption and manufacturing costs, can connect the reinforcing bar of vertical, level or oblique layout.
Background technology
Cement grouting steel bar connecting joint is a kind of traditional reinforcing bar mechanical connection method being applied in prefabricated concrete structure, this joint is made up of grout sleeve, cement mortar and Ribbed Bar, when joint connects, two reinforcing bars insert in sleeve, again cement mortar is poured into sleeve, be full of the gap between sleeve and reinforcing bar, after cement mortar sclerosis, two reinforcing bars are joined together.The shortcoming of this joint is: be embedded in when connecting reinforcement in concrete component dispatches from the factory with grout sleeve and be not connected, just in the time that member is installed connection, just to the cement mortar of pouring water in sleeve, fill the gap between full joint two end bars and sleeve, grouting connects operation and is subject to the factors such as job site environment temperature and operator quality to affect larger, need strict execution control measure, the quality of connection of guarantee joint, in addition, this class sleeve adopts ductile iron casting to form conventionally, production technology to sleeve and equipment requirement are very high, sleeve volume is large, high material consumption, joint cost is high.
In recent years, in cementation jointing family, someone has developed the grouting straight thread connector that straight thread combines with grouting again, the feature of this joint is: sleeve is processed into rolled section steel, bush material performance is good, machining accuracy and being of high quality, sleeve and pre-buried connecting reinforcement are together by a threaded connection in factory for prefabrication, member erecting bed is as long as fill non-shrinking cement mortar half joint, just the reinforcing bar of the member at two ends can be linked together, but its shortcoming: while being prefabricated in the factory, need first on reinforcing bar, to process connecting thread, in production, need to check with ring screw gauge and ruler etc. the size of steel bar joint screw, when reinforcement installation, need screw-down torque to be in accordance with regulations tightened on sleeve, therefore, the quality of sleeve and screw thread steel link and screw thread steel processing staff and sleeve are connected operating personnel's technical level with screw thread steel, process discipline implementation capacity has much relations, in addition, screw thread steel processing, reinforcing bar is connected production with bush whorl also more spent man-hour, and the time operation of the horizontal reinforcement of this joint tie-beam uses inconveniently, therefore, be mainly suitable for the connection of vertical joint, the expansion of application surface is subject to certain limitation.
When prefabricated units beam connects at the scene at present, except finish rolling deformed bar, connection that normal tape rib reinforcement can only adopt traditional sleeve extruding to connect or sleeve is in the milk entirely, and sleeve extruding jointing will produce axially-extending distortion while connecting and cause and be connected reinforcing bar and occur bendingly at joint area, affect the quality of connection of member; Sleeve is in the milk jointing entirely because two ends all adopt cementation connection, and branch sleeve length dimension is large, consumes grouting material many, and joint cost is high.
Utility model content
For the deficiency of described jointing, the purpose of this utility model is: a kind of grouting crimping composite joint joint is provided, effectively improve grouting and connect production efficiency, dwindle sleeve dimensions, joint not only can be applicable to dry wall, post vertical reinforcement connects, the horizontal reinforcement of the precast beam that can also be used for connects, and the performance of joint reaches the highest performance level of domestic and international reinforcing steel bar machinery connection standard regulation.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of grouting crimping composite joint joint, comprise connecting reinforcement, connector and cement mortar, described connecting reinforcement is two, one end of described connector is crimping link, connecting reinforcement described in one inserts in this crimping link, the other end of described connector is grouting link, this end is provided with grouting chamber, described grouting is provided with fin in chamber inner groovy and/or chamber in chamber, connecting reinforcement described in another root inserts in this grouting chamber, and is combined with connector and forms a connector by being full of non shrinking cement mortar in both gaps; By the extruding to crimping link, make connector engage and link together with the cross rib of the connecting reinforcement end of this crimping link or the jog of special processing.
Described grouting crimping composite joint joint, the external diameter of described crimping link is less than the external diameter of the link that is in the milk, and described crimping link endoporus aperture is greater than crimping link and is connected the external diameter of reinforcing bar, and is less than the endoporus aperture in grouting link grouting chamber.
Described grouting crimping composite joint joint, in described chamber inner groovy or chamber, fin is set to continuous or interval in the axial direction of described connector, and in described chamber inner groovy or chamber, fin is upwards being set to continuous or interval the week of described connector.
Described grouting crimping composite joint joint, described connector is made up of metal cylinder and connecting bushing, connecting bushing is placed in the crimping link endoporus of cylindrical shell, and the internal diameter of connecting bushing is greater than the endoporus aperture that this end is connected the external diameter of reinforcing bar and is less than grouting link grouting chamber.
Described grouting crimping composite joint joint, minimumly on the grouting chamber barrel of the grouting link of described connector is provided with one and crosses slurry hole.
Described grouting crimping composite joint joint, the connecting reinforcement described in two is Ribbed Bar.
Described grouting crimping composite joint joint, described connecting reinforcement, is normal tape rib reinforcement at the connecting reinforcement of crimping link, the connecting reinforcement of grouting link is the reinforcing bar that has the expansion butt end head that jumping-up or crimp sleeve or built-up welding be welded.
Described grouting crimping composite joint joint, described connecting reinforcement, is processed with jumping-up head or rolling or pushes the linkage section that forms concave, convex structure in the connecting reinforcement end of crimping link, and the connecting reinforcement of grouting link is normal tape rib reinforcement.
Described grouting crimping composite joint joint, described connecting reinforcement, be processed with the linkage section that jumping-up head or rolling or extruding form concave, convex structure in the connecting reinforcement end of crimping link, the connecting reinforcement of grouting link is the reinforcing bar that has the expansion butt end head that jumping-up or crimp sleeve or built-up welding be welded.
Described grouting crimping composite joint joint, on the external surface of described connector, be provided with outside connector fin outside groove and/or connector, the outer fin of the outer groove of described connector or connector is made as continuous or interval in axial direction of connector, and the outer groove of described connector or the outer fin of connector are upwards being made as continuous or interval the week of connector.
Compared with prior art, adopt the advantage the utlity model has of technique scheme to be:
The connector of this joint is by the good metal material of application deformation performance, having realized grouting crimping composite joint joint one end adopts crimping connected mode to be connected with reinforcing bar, coordinate special crimping apparatus, as: the crimping apparatus of multi-clove type pressing mold, the application of the crimping apparatus of single-blade or multi-edge type pressing mold, its crimping connects production efficiency and substantially exceeds the production efficiency that is threaded that has grouting straight thread joint, and can adopt pressure control crimping, reinforcing bar outside dimension deviation is down to very little on the impact of quality of connection, but also can judge crimping quality of connection according to the check of the presentation quality of connector after crimping and outside dimension, intuitive and convenient, in guaranteeing joint quality, lower percent defective, lower manufacturing cost, in addition, also can realize crimping by automation equipment connects production automatically and detects, greatly improve productivity ratio and quality stability that the pre-buried connecting reinforcement of prefabricated units factory is connected with connector, although the connector crimping link length of this grouting crimping composite joint joint is slightly larger than the length of grouting thread connecting joint threaded ends, but the processing cost that this joint raising connection production efficiency and quality of connection reduce far exceedes the difference of connector material cost, industrialized building is improved to quality, reduce costs, expanding application has great importance.
In addition, this joint also can carry out in prefabricated units erecting bed the connection of the horizontal reinforcement of beam, plate.The utility model is loaded onto connector on prefabricated units connecting reinforcement at the scene, after member is in place, connector pressure connection terminal is enclosed within on crimping connecting reinforcement, use light single-blade pressing mold crimping apparatus that the crimping link of connector is connected with this end connecting reinforcement crimping, and then the grouting of carrying out other end connecting reinforcement connects, this method is without processing being especially connected reinforcing bar, not only easy to connect, joint performance good, and crimping apparatus operation is used also very convenient, production efficiency is high, and joint cost is low.
In the strengthening and rebuilding engineering of this external existing concrete structure, the connection of some privileged sites bar reinforcements all cannot solve by existing mechanical connection method, this joint provides a new convenience, reliable solution, therefore, this joint also has good application prospect at transformation ruggedized construction construction field.
There is no the reinforcing bar that is connected of cross rib for surface, the reinforcing bar end upset of connecting reinforcement or rolling or extruding are formed after the linkage section of concave, convex structure, then carry out crimping and grouting is connected, can reach equally the performance indications that mechanical connection standard stipulates.And the connecting reinforcement of grouting link adopts the reinforcing bar that has the expansion butt end head that jumping-up or crimp sleeve or built-up welding be welded, compare the required grouting connection chamber length of normal tape rib reinforcement shorter, shortened connector length, reduced cement mortar consumption and make link cost lower.
In sum, the grouting crimping composite joint joint the utility model proposes is compared existing grouting jointing and can be reduced production costs, and carries production efficiency and quality of connection, and economic and technical norms exceed existing all kinds of reinforcing bar grouting jointing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of the present utility model;
Fig. 2 is the structural representation of the second embodiment of the present utility model;
Fig. 3 is the structural representation of the 3rd embodiment of the present utility model;
Fig. 4 is the structural representation of the 4th embodiment of the present utility model;
Fig. 5 is the structural representation of the 5th embodiment of the present utility model.
Description of reference numerals: 1 reinforcing bar; The link of 2 reinforcing bars 1; 3 crimping links; 4 cross slurry hole; 5 cement mortar; 6 connectors; The link of 7 reinforcing bars 9; 8 cross slurry hole; 9 reinforcing bars; 10 chamber inner groovies; Fin in 11 chambeies; 12 connecting bushings; The jumping-up head of 13 reinforcing bars 9; The jumping-up head of 14 reinforcing bars 1; The outer fin of 15 connectors; The outer groove of 16 connectors; 17 crimp sleeves.
The specific embodiment
Embodiment 1:
Embodiment shown in Figure 1, this grouting crimping composite joint joint comprises: connecting reinforcement, connector 6 and cement mortar 5, described connecting reinforcement is two, wherein one is Ribbed Bar 1, another root is Ribbed Bar 9, one end of described connector 6 is crimping link 3, described Ribbed Bar 1 is inserted in this crimping link 3, the other end of described connector 6 is grouting link, this end is provided with grouting chamber, in described grouting chamber, be provided with fin 11 in chamber inner groovy 10 and chamber, in described chamber inner groovy 10 and chamber, fin 11 is set to interval in the axial direction of described connector 6, described Ribbed Bar 9 is inserted in this grouting chamber, and form a connector by the non shrinking cement mortar 5 being full of in both gaps with connector 6 combinations, by the extruding to crimping link 3, make connector 6 produce plastic strain, connector 6 engages and links together with the cross rib of this end Ribbed Bar 1 end or the jog of special processing, and by above-mentioned compound connected mode, Ribbed Bar 1 and Ribbed Bar 9 is linked together.
The external diameter of described crimping link 3 is less than the external diameter of the link that is in the milk, and described crimping link 3 endoporus apertures are greater than the external diameter of crimping link Ribbed Bar 1, and described crimping link 3 endoporus apertures are less than the endoporus aperture of the link that is in the milk.On the barrel of the grouting link of described connector 6, be provided with one and cross slurry hole 8; On the grouting link of described connector 6 barrel adjacent with crimping link 3, be provided with one and cross slurry hole 4.
It is by reaching with the tight engagement of connected piece the object being connected after crimping link 3 plastic strain of connector that crimping connects.But carry out in the scope that the plastic strain of the method connector need allow at its material.The internal diameter of connector is with more approaching by the external diameter of connecting reinforcement 1 with ribbing, connector is less with the plastic strain of closely being engaged required generation by connecting reinforcement 1 with ribbing, the extruding force needing is also less, connect production efficiency higher, therefore the internal diameter of connector crimping link 3 is generally and is greater than and the approaching external diameter (generally can not exceed the maximum outside diameter 5mm that is connected reinforcing bar) that is connected reinforcing bar.
Cementation connects, the internal diameter in connector grouting chamber need be greater than the external diameter that is connected reinforcing bar 9, (more than being generally greater than the maximum outside diameter 5mm that is connected reinforcing bar 9), be the axial location bias that is inevitably connected reinforcing bar due to the fabricated construction field of this method of attachment application on the one hand, be convenient to connected piece and insert in connector chamber; Also must reserve certain space simultaneously, guarantee to be filled into cement mortar in connector guarantee its component evenly the condition current downflow of (to reach design performance) to connector in and be connected the each gap location that needs filling between reinforcing bar.
Because two kinds of needed connector internal diameter sizes of method of attachment differ greatly, so in this grouting crimping composite joint joint, need to address this problem, as consistent with the external diameter of grouting link in the external diameter of crimping link 3, the wall thickness of crimping link 3 will obviously be greater than the wall thickness at the chamber place of being in the milk, not only waste material, and make crimping link 3 reach connect required distortion need to apply larger strength, need to use the extrusion equipment of larger power output, increase the cost that crimping connects operation, therefore this grouting crimping composite joint joint adopts crimping link 3 reduced diameter can effectively reduce the wall thickness of crimping link 3, reduce crimp force, improve joint efficiency.
Embodiment 2:
Referring to Fig. 2, this embodiment difference from Example 1 is: described connector 6 is made up of metal cylinder and connecting bushing 12, connecting bushing 12 is placed in crimping link 3 endoporus of cylindrical shell, and the internal diameter of connecting bushing 12 is greater than the endoporus aperture that this end is connected the external diameter of reinforcing bar 1 and is less than the link that is in the milk.
Adopt the structure of crimping link 3 liner connecting bushings 12, connecting bushing 12 can be by it structure transmitted load with the concavo-convex or screw-threaded engagement of connector 6 crimping link endoporus, the consumption that can save connector rapidoprint, the cost of reduction connector.
Embodiment 3:
Referring to Fig. 3, this embodiment difference from Example 1 is: connecting reinforcement 9 is for being processed with the Ribbed Bar of jumping-up head 13.
Embodiment 4:
Referring to Fig. 4, this embodiment difference from Example 1 is: connecting reinforcement 1 is for being processed with the Ribbed Bar of jumping-up head 14, and connecting reinforcement 9 is the reinforcing bars that are connected with crimp sleeve 17.
Embodiment 5:
Referring to Fig. 5, this embodiment difference from Example 1 is: on the external surface of described connector 6, be provided with outside connector fin 15 outside groove 16 or connector, the outer groove 16 of described connector and the outer fin 15 of connector are made as interval in the axial direction of connector.
More than illustrate the utility model just illustrative; and nonrestrictive, those of ordinary skills understand, in the case of not departing from the spirit and scope that claim limits; can make many modifications, variation or equivalence, but within all falling into protection domain of the present utility model.
Claims (10)
1. a grouting crimping composite joint joint, comprise connecting reinforcement, connector and cement mortar, described connecting reinforcement is two, it is characterized in that: one end of described connector is crimping link, connecting reinforcement described in one inserts in this crimping link, the other end of described connector is grouting link, this end is provided with grouting chamber, described grouting is provided with fin in chamber inner groovy and/or chamber in chamber, connecting reinforcement described in another root inserts in this grouting chamber, and is combined with connector and forms a connector by being full of non shrinking cement mortar in both gaps; By the extruding to crimping link, make connector engage and link together with the cross rib of the connecting reinforcement end of this crimping link or the jog of special processing.
2. grouting crimping composite joint joint according to claim 1, it is characterized in that: the external diameter of described crimping link is less than the external diameter of the link that is in the milk, described crimping link endoporus aperture is greater than crimping link and is connected the external diameter of reinforcing bar, and is less than the endoporus aperture in grouting link grouting chamber.
3. grouting crimping composite joint joint according to claim 1, it is characterized in that: in described chamber inner groovy or chamber, fin is set to continuous or interval in the axial direction of described connector, in described chamber inner groovy or chamber, fin is upwards being set to continuous or interval the week of described connector.
4. grouting crimping composite joint joint according to claim 1, it is characterized in that: described connector is made up of metal cylinder and connecting bushing, connecting bushing is placed in the crimping link endoporus of cylindrical shell, and the internal diameter of connecting bushing is greater than the endoporus aperture that this end is connected the external diameter of reinforcing bar and is less than grouting link grouting chamber.
5. grouting crimping composite joint joint according to claim 1, is characterized in that: minimumly on the grouting chamber barrel of the grouting link of described connector be provided with one and cross slurry hole.
6. grouting crimping composite joint joint according to claim 1, is characterized in that: the connecting reinforcement described in two is Ribbed Bar.
7. grouting crimping composite joint joint according to claim 1, it is characterized in that: described connecting reinforcement, be normal tape rib reinforcement at the connecting reinforcement of crimping link, the connecting reinforcement of grouting link is the reinforcing bar that has the expansion butt end head that jumping-up or crimp sleeve or built-up welding be welded.
8. grouting crimping composite joint joint according to claim 1, it is characterized in that: described connecting reinforcement, be processed with the linkage section that jumping-up head or rolling or extruding form concave, convex structure in the connecting reinforcement end of crimping link, the connecting reinforcement of grouting link is normal tape rib reinforcement.
9. grouting crimping composite joint joint according to claim 1, it is characterized in that: described connecting reinforcement, be processed with the linkage section that jumping-up head or rolling or extruding form concave, convex structure in the connecting reinforcement end of crimping link, the connecting reinforcement of grouting link is the reinforcing bar that has the expansion butt end head that jumping-up or crimp sleeve or built-up welding be welded.
10. according to the grouting crimping composite joint joint described in claim 1 to 9 any one, it is characterized in that: on the external surface of described connector, be provided with outside connector fin outside groove and/or connector, the outer fin of the outer groove of described connector or connector is made as continuous or interval in axial direction of connector, and the outer groove of described connector or the outer fin of connector are upwards being made as continuous or interval the week of connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320882809.2U CN203701435U (en) | 2013-12-27 | 2013-12-27 | Composite connection joint for grouting connection and compression connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320882809.2U CN203701435U (en) | 2013-12-27 | 2013-12-27 | Composite connection joint for grouting connection and compression connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203701435U true CN203701435U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320882809.2U Expired - Lifetime CN203701435U (en) | 2013-12-27 | 2013-12-27 | Composite connection joint for grouting connection and compression connection |
Country Status (1)
| Country | Link |
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| CN (1) | CN203701435U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563397A (en) * | 2014-12-24 | 2015-04-29 | 中国建筑股份有限公司 | Extruded half-grouted steel bar sleeve, connection structure and construction method thereof |
| CN104563396A (en) * | 2014-12-24 | 2015-04-29 | 中国建筑股份有限公司 | A pier head extruded semi-grouting steel bar sleeve, connection structure and construction method thereof |
| CN105064619A (en) * | 2015-08-02 | 2015-11-18 | 长安大学 | Rebar sleeve grouting connection member for prefabricated assembled type concrete component and connection method |
| CN105133795A (en) * | 2015-05-28 | 2015-12-09 | 山东万斯达建筑科技股份有限公司 | Variable-diameter half grouting sleeve and construction method thereof |
| CN105178516A (en) * | 2015-09-28 | 2015-12-23 | 中国建筑股份有限公司 | Extruded semi-grouting reinforced sleeve with built-in casing, connective structure, and construction method |
-
2013
- 2013-12-27 CN CN201320882809.2U patent/CN203701435U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563397A (en) * | 2014-12-24 | 2015-04-29 | 中国建筑股份有限公司 | Extruded half-grouted steel bar sleeve, connection structure and construction method thereof |
| CN104563396A (en) * | 2014-12-24 | 2015-04-29 | 中国建筑股份有限公司 | A pier head extruded semi-grouting steel bar sleeve, connection structure and construction method thereof |
| CN105133795A (en) * | 2015-05-28 | 2015-12-09 | 山东万斯达建筑科技股份有限公司 | Variable-diameter half grouting sleeve and construction method thereof |
| CN105064619A (en) * | 2015-08-02 | 2015-11-18 | 长安大学 | Rebar sleeve grouting connection member for prefabricated assembled type concrete component and connection method |
| CN105178516A (en) * | 2015-09-28 | 2015-12-23 | 中国建筑股份有限公司 | Extruded semi-grouting reinforced sleeve with built-in casing, connective structure, and construction method |
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Granted publication date: 20140709 |
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