CN112726964A - Screw thread grout sleeve suitable for two muscle of merging are connected side by side - Google Patents
Screw thread grout sleeve suitable for two muscle of merging are connected side by side Download PDFInfo
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- CN112726964A CN112726964A CN202011629798.8A CN202011629798A CN112726964A CN 112726964 A CN112726964 A CN 112726964A CN 202011629798 A CN202011629798 A CN 202011629798A CN 112726964 A CN112726964 A CN 112726964A
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- sleeve body
- sleeve
- grouting
- sealing plug
- threaded
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/18—Spacers of metal or substantially of metal
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a threaded grouting sleeve suitable for double parallel ribs connected in parallel, which comprises a sleeve body; an upper sealing plug is arranged at the opening of the top of the sleeve body, a lower sealing plug is arranged at the opening of the bottom of the sleeve body, a grout discharging hole is arranged on the side surface of the top of the sleeve body, a grouting hole is arranged on the side surface of the bottom of the sleeve body, a limiting barrier is arranged in the sleeve body, the lower parts of two upper-end reinforcing steel bars penetrate through the upper sealing plug and are inserted into the sleeve body and then are contacted with the limiting barrier, the upper parts of two lower-end reinforcing steel bars penetrate through the lower sealing plug and are inserted into the sleeve body and then are contacted with; be provided with a plurality of shear force keys and a plurality of screw thread rib on the inner wall of the cover barrel, spacing separates to keep off for cruciform structure, and this screw thread grout sleeve can be applicable to and the muscle is connected, and the reliability is higher.
Description
Technical Field
The invention belongs to the field of assembly type building construction, and relates to a threaded grouting sleeve suitable for double parallel ribs in parallel connection.
Background
In the design of large-span or high-rise structures and structures bearing heavy equipment loads, such as bridges, viaducts in rail transit, elevated stations and the like, in order to reduce the self-weight of the structures and ensure the ductility of bearing capacity and other requirements, the section size of the members is often controlled, and the conditions of large self-reinforcing bar distribution amount and tight arrangement are further caused, so that the reinforcing bar spacing cannot meet the minimum net spacing requirement in the specification easily; in addition, dense reinforcing steel bars can cause the problems of difficult arrangement and binding, difficult vibration of concrete pouring and the like in the construction process.
In order to solve the problems in the structural design and meet the structural requirements, the rib merging design is proposed earlier in the countries in Europe and America, and a large number of researches are carried out, and rib merging construction measures are added in the 2010 concrete structural design specification (GB50010-2010) in China.
The occurrence of the combined reinforcement mainly solves the following reinforcement arrangement problems: 1. the steel bars or reinforcing bars with enough diameters cannot be obtained and are limited according to the requirement of clear distance; 2. the structural reinforcement is designed according to the clear distance limit value and the calculation requirement, but cannot be arranged at the required position; 3. the dense arrangement of the reinforcing bars causes concrete pouring difficulty. On this basis, the arrangement of several bars together is considered, usually only for longitudinally stressed bars. The most common arrangement is that the double parallel ribs are arranged in a straight line in the transverse direction or the longitudinal direction, and the triple parallel ribs are arranged in a finished product in a straight line.
Along with the development of novel building industrialization, prefabricated built-in concrete structure obtains rapid development owing to have advantages such as production efficiency height, prefabricated component quality control of being convenient for, green, this kind of structure is mainly assembled by prefabricated component such as precast beam, precast column, prefabricated floor and is connected and constitute, and the reliable connection of atress reinforcing bar is the key of guaranteeing the whole good performance of assembled concrete structure between these components, adopts different connected mode also will directly influence engineering cost and progress.
The connection mode of the steel bars in the prefabricated concrete structure mainly comprises sleeve grouting connection, slurry anchor overlapping, welding connection, bolt connection, post-pouring wet joint connection and the like, and in the current design, different connection methods are usually selected in consideration of different construction environments, technical levels and specific project characteristics.
Among the several prefabricated connection modes, the grouting connection method is particularly suitable for being used for sleeve grouting connection, mature in connection construction technology, short in connection distance and most widely applied. The work mechanism of the method is that the load is transmitted from the reinforcing steel bar at one end to the reinforcing steel bar at the other end through the bonding effect between the reinforcing steel bar, the grouting material and the sleeve, and the bonding strength between the reinforcing steel bar and the grouting material is improved by utilizing the constraint effect of the sleeve.
However, at present, related research and application of connection technology are performed under the condition of connection of single steel bars, and if a component with arranged steel bars exists in an assembled structure, assembling problems caused by the steel bars need to be considered at this time.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned disadvantages of the prior art and providing a threaded grout sleeve which is suitable for double parallel rib side-by-side connection and has good connection reliability.
In order to achieve the purpose, the threaded grouting sleeve suitable for double parallel ribs connected in parallel comprises a sleeve body;
an upper sealing plug is arranged at the opening of the top of the sleeve body, a lower sealing plug is arranged at the opening of the bottom of the sleeve body, a grout discharging hole is arranged on the side surface of the top of the sleeve body, a grouting hole is arranged on the side surface of the bottom of the sleeve body, a limiting barrier is arranged in the sleeve body, the lower parts of two upper-end reinforcing steel bars penetrate through the upper sealing plug and are inserted into the sleeve body and then are contacted with the limiting barrier, the upper parts of two lower-end reinforcing steel bars penetrate through the lower sealing plug and are inserted into the sleeve body and then are;
the inner wall of the sleeve body is provided with a plurality of shear keys and a plurality of thread ribs, and the limiting barrier is of a cross structure.
The cross section of the sleeve body is in a shape enclosed by two intersected circles.
The length of the shear connector is 5-10 mm.
All the shear connectors are divided into 3-6 groups, and all the shear connectors in all the groups of shear connectors are sequentially distributed along the annular direction.
The grouting hole and the grout discharging hole are both threaded connectors.
The thickness of the upper sealing plug and the lower sealing plug is 20-30 mm.
The invention has the following beneficial effects:
when the threaded grouting sleeve suitable for double parallel bars to be connected is operated specifically, the sleeve body is internally provided with the limiting barrier, the lower part of each upper-end steel bar penetrates through the upper sealing plug and is inserted into the sleeve body to be contacted with the limiting barrier, the upper part of each lower-end steel bar penetrates through the lower sealing plug and is inserted into the sleeve body to be contacted with the limiting barrier so as to realize parallel bar connection, and meanwhile, the inner wall of the sleeve body is provided with a plurality of shear keys and a plurality of threaded ribs, wherein the shear keys can play a role in externally restraining the steel bars and preventing the steel bars from branching, so that grouting materials can be filled in the sleeve body conveniently, can form tight connection with the grouting materials and form certain mechanical connection with the steel bars, the tensile capacity of the whole grouting sleeve is effectively improved, and the anchoring reliability is ensured. In addition, the screw thread rib can guarantee that grout material flows smoothly, avoid producing the not full defect of grout, screw thread rib and grout material form unsmooth interface simultaneously, can provide sufficient cohesive force, occlusal force and frictional force, guarantee interface connection's reliability, simple structure, reasonable in design, overall dimension and occupation volume are less, insert the reinforcing bar along the preformed hole in cover barrel both ends, seal the leaking stoppage grout, whole operation process is simple, the preparation installation of being convenient for.
Drawings
FIG. 1 is a front view of a grout sleeve connection;
FIG. 2 is a side view of a grout sleeve connection;
FIG. 3 is a top view of the grout sleeve connection;
FIG. 4 is a longitudinal cross-sectional view of a grout sleeve connection;
fig. 5 is a side view of the sleeve body 1;
fig. 6 is a sectional view of the inside of the sleeve body 1.
Wherein, 1 is the cover barrel, 2 is the upper end reinforcing bar, 3 is the lower extreme reinforcing bar, 4 are row's thick liquid hole, 5 are the grout hole, 61 are the upper seal plug, 62 are the lower seal plug, 7 are the shear force key, 8 are spacing to separate the fender, 9 are the screw thread rib.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 6, the threaded grouting sleeve suitable for double parallel ribs side by side connection according to the present invention comprises a sleeve body 1; an upper sealing plug 61 is arranged at the opening of the top of the sleeve body 1, a lower sealing plug 62 is arranged at the opening of the bottom of the sleeve body 1, a grouting hole 5 is arranged on the side of the bottom of the sleeve body 1, a grout discharging hole 4 is arranged on the side of the top of the sleeve body 1, a limiting baffle 8 is arranged in the sleeve body 1, the lower parts of two upper end reinforcing steel bars 2 penetrate through the upper sealing plug 61 and are inserted into the sleeve body 1 to be contacted with the limiting baffle 8, the upper parts of two lower end reinforcing steel bars 3 penetrate through the lower sealing plug 62 and are inserted into the sleeve body 1 to be contacted with the limiting baffle 8, and grouting materials are poured into; the inner wall of the sleeve body 1 is provided with a plurality of shear keys 7 and a plurality of thread ribs 9, and the limiting barrier 8 is of a cross structure.
The cross section of the sleeve body 1 is in a shape enclosed by two intersecting circles; the length of the shear key 7 is 5-10 mm; all the shear keys 7 are divided into 3-6 groups, and all the shear keys 7 in all the groups of shear keys 7 are sequentially distributed along the annular direction; the grouting holes 5 and the grout discharging holes 4 are all threaded interfaces; the thickness of the upper sealing plug 61 and the lower sealing plug 62 is 20-30 mm.
Holes for steel bars to pass through are reserved in the middle parts of the upper sealing plug 61 and the lower sealing plug 62; the threaded rib 9 can guarantee the interface connection reliability with the fine combination of grout material, and the shear force key 7 can retrain the branching of upper end reinforcing bar 2 and lower extreme reinforcing bar 3, can also form certain mechanical connection with the reinforcing bar, improves the telescopic anchor performance of whole grout, separates 8 anchor length requirements of guaranteeing the reinforcing bar through spacing.
The shear keys 7 are all made of high-quality structural steel or nodular cast iron through casting.
Grouting hole 5 and row's thick liquid hole 4 are the hickey, are convenient for connect grout extension pipe and row's thick liquid extension pipe.
The concrete construction process of the invention is as follows:
1) the steel bar is inserted into the sleeve body 1 for positioning: the upper sealing plug 61 and the lower sealing plug 62 penetrate through the upper end steel bar 2 and the lower end steel bar 3, then the upper end steel bar 2 and the lower end steel bar 3 are inserted into the reserved hole of the sleeve body 1 until the end part of the steel bar touches the limiting barrier 8, and then the upper sealing plug 61 and the lower sealing plug 62 are used for plugging holes in the two ends of the sleeve body 1 in time, so that sundries are prevented from entering and construction is prevented from being influenced.
2) Grouting slurry: grouting holes 5 reserved in a connecting sleeve body 1 by grouting equipment, pressurizing to perform grouting in the sleeve body 1, plugging the grout discharge holes 4 when grouting materials in the grout discharge holes 4 flow out, stopping grouting when the sleeve body 1 is filled with the grout, and simultaneously plugging the grout discharge holes 5; if the reserved grouting holes 5 and the reserved grout discharging holes 4 are short and not enough to be connected with grouting equipment, the grouting holes 5 and the reserved grout discharging holes 4 can be in threaded connection with lengthened grouting pipes and lengthened grout discharging pipes, and the grouting pipes are connected with the grouting equipment to perform the same grouting operation.
3) And (5) maintenance: and curing the grouted test piece according to the requirements, and completing the connection of the whole double-parallel-rib test piece after the specified curing age is reached.
Claims (6)
1. A threaded grouting sleeve suitable for double parallel ribs to be connected side by side is characterized by comprising a sleeve body (1);
an upper sealing plug (61) is arranged at the top opening of the sleeve body (1), a lower sealing plug (62) is arranged at the bottom opening of the sleeve body (1), grouting holes (5) are formed in the side face of the bottom of the sleeve body (1), grout discharging holes (4) are formed in the side face of the top of the sleeve body (1), a limiting barrier (8) is arranged in the sleeve body (1), the lower portions of two upper-end reinforcing steel bars (2) penetrate through the upper sealing plug (61) and are inserted into the sleeve body (1) to be contacted with the limiting barrier (8), the upper portions of two lower-end reinforcing steel bars (3) penetrate through the lower sealing plug (62) and are inserted into the sleeve body (1) to be contacted with the limiting barrier (8), and grouting material is poured into the sleeve body (;
the inner wall of the sleeve body (1) is provided with a plurality of shear keys (7) and a plurality of thread ribs (9), and the limiting barrier (8) is of a cross structure.
2. A threaded grouting sleeve suitable for double parallel rib side-by-side connection according to claim 1, characterised in that the cross-section of the sleeve body (1) is in the shape enclosed by two intersecting circles.
3. A threaded grouting sleeve suitable for double parallel rib side by side connection according to claim 1, characterised in that the length of the shear key (7) is 5-10 mm.
4. A threaded grouting sleeve suitable for double parallel rib side-by-side connection according to claim 1, characterised in that all shear keys (7) are divided into 3-6 groups, and each shear key (7) in each group of shear keys (7) is distributed in turn in the circumferential direction.
5. A threaded grouting sleeve suitable for double parallel rib side-by-side connection according to claim 1, characterised in that the grouting holes (5) and the grout outlet (4) are threaded joints.
6. A threaded grouting sleeve adapted for double parallel rib side by side connection according to claim 1, characterised in that the upper sealing plug (61) and the lower sealing plug (62) are both 20-30mm thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629798.8A CN112726964A (en) | 2020-12-30 | 2020-12-30 | Screw thread grout sleeve suitable for two muscle of merging are connected side by side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629798.8A CN112726964A (en) | 2020-12-30 | 2020-12-30 | Screw thread grout sleeve suitable for two muscle of merging are connected side by side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112726964A true CN112726964A (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011629798.8A Pending CN112726964A (en) | 2020-12-30 | 2020-12-30 | Screw thread grout sleeve suitable for two muscle of merging are connected side by side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112726964A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625641A (en) * | 2016-02-16 | 2016-06-01 | 沈阳建筑大学 | FRP (fiber reinforced polymer) grouting sleeve for connecting reinforced steel bars |
| CN107740543A (en) * | 2017-11-28 | 2018-02-27 | 湖南大学 | A kind of connection of double and muscle full grout sleeve and double and muscle connection method |
| US20190177977A1 (en) * | 2017-12-12 | 2019-06-13 | Jason M. Miller | Sleeve for coupling reinforcing bar and a method of using the same |
| CN110284659A (en) * | 2019-07-22 | 2019-09-27 | 西安建筑科技大学 | It is a kind of for double and muscle connect can the fixed grout sleeve of self compaction |
-
2020
- 2020-12-30 CN CN202011629798.8A patent/CN112726964A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625641A (en) * | 2016-02-16 | 2016-06-01 | 沈阳建筑大学 | FRP (fiber reinforced polymer) grouting sleeve for connecting reinforced steel bars |
| CN107740543A (en) * | 2017-11-28 | 2018-02-27 | 湖南大学 | A kind of connection of double and muscle full grout sleeve and double and muscle connection method |
| US20190177977A1 (en) * | 2017-12-12 | 2019-06-13 | Jason M. Miller | Sleeve for coupling reinforcing bar and a method of using the same |
| CN110284659A (en) * | 2019-07-22 | 2019-09-27 | 西安建筑科技大学 | It is a kind of for double and muscle connect can the fixed grout sleeve of self compaction |
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Application publication date: 20210430 |
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| RJ01 | Rejection of invention patent application after publication |