CN212026781U - Connecting structure of prefabricated floor slab and steel beam - Google Patents
Connecting structure of prefabricated floor slab and steel beam Download PDFInfo
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- CN212026781U CN212026781U CN202020414072.1U CN202020414072U CN212026781U CN 212026781 U CN212026781 U CN 212026781U CN 202020414072 U CN202020414072 U CN 202020414072U CN 212026781 U CN212026781 U CN 212026781U
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Abstract
The utility model relates to a connection structure of prefabricated floor and girder steel belongs to building component field, and it includes a plurality of girder steels, two liang be provided with the prefabricated plate between the girder steel, the upper surface of girder steel is provided with a plurality of steel sleeves along its axis direction, the opening of steel sleeve up, the inside wall of steel sleeve is provided with the thread line, the girder steel internal rotation is provided with the crab-bolt, be provided with the concrete between the relative lateral wall of steel sleeve lateral wall and prefabricated plate. The utility model discloses have the continuous atress characteristic of ensureing the prefabricated plate, make the external dimension of prefabricated plate not confine the effect that the synthetic single board check is enclosed to the girder steel.
Description
Technical Field
The utility model belongs to building element field especially relates to a connection structure of prefabricated floor and girder steel.
Background
The prefabricated steel structure building is a main form of the prefabricated building, has the advantages of light weight, high speed, good performance and saving, and the prefabricated slab greatly reduces the field operation amount and the construction waste of the prefabricated steel structure building, is favorable for accelerating the construction speed and shortening the construction period, and is more environment-friendly. It is necessary to explore the connection of precast slabs to precast slabs and beams to achieve the same connection as cast-in-place slabs and beams to ensure the integrity of the floor and the transmission of horizontal forces.
The existing precast slabs usually adopt a precast mode of a single slab lattice, namely the external dimension of the precast slab must be strictly determined according to a region lattice enclosed by steel beams (or precast concrete beams), and the size of the slab does not exceed the slab lattice except special areas such as edge cantilever slabs and the like. Every board check periphery that is cut apart by girder steel (or prefabricated concrete beam) is the bar connecting band, adopts wet-type connected mode at the job site: the steel bars of the floor slabs are connected around the slabs in the modes of reserving steel plates, angle irons or beard bars and the like, and then, fine aggregate concrete strips are poured to connect the precast slabs with steel beams (or precast concrete beams).
However, in this wet construction method, the prefabricated panels are only connected to the steel beams at the periphery, so that the size of the single prefabricated panel is limited by the size of the cells enclosed by the floor steel beams (or the prefabricated concrete beams), and the given cells cannot be spanned even if the transportation and hoisting conditions permit.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a have the continuous atress characteristic of ensureing the prefabricated plate, make the external dimension of prefabricated plate not confine the prefabricated floor slab and the connection structure of girder steel of synthetic single board check effect to the girder steel.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a connection structure of precast floor and girder steel, includes a plurality of girder steels, two liang be provided with the prefabricated plate between the girder steel, the upper surface of girder steel is provided with a plurality of steel casings along its axis direction, the opening of steel casing up, the inside wall of steel casing is provided with the thread, the girder steel internal rotation is provided with the crab-bolt, be provided with the concrete between the relative lateral wall of steel casing lateral wall and prefabricated plate.
By adopting the technical scheme, the anchor bolt is rotatably arranged in the steel sleeve, concrete is added among the steel sleeve, the precast slab and the steel beam, and the precast slab is connected with the steel beam through the internal discrete points; the connection mode of the anchor bolt sleeve is very convenient and fast, and the process is simple and reliable; the grouting amount is small after the point type connection node is connected, slurry leakage is not easy to occur, and the site is neat and ordered; meanwhile, the method has the advantages of no on-site welding in the assembling process, reduction of wet operation workload and improvement of on-site construction efficiency.
The present invention may be further configured in a preferred embodiment as: and hole edge steel brackets are arranged on the opposite side walls of the precast slab.
Through adopting above-mentioned technical scheme, the setting of hole limit steel support can improve the tensile ability of concrete whole resistance to produce the fracture after avoiding the concrete atress.
Furthermore, one side of the anchor bolt, which is far away from the steel beam, is provided with an installation block, and two adjacent prefabricated plates are provided with grooves for embedding the installation blocks.
Through adopting above-mentioned technical scheme, the setting of installation piece and recess prevents the outstanding prefabricated plate's of crab-bolt upper surface, avoids the staff to collide carelessly and leads to the position of crab-bolt to change.
Furthermore, a grouting guide pipe is arranged on the precast slab, one end of the grouting guide pipe is communicated with the upper surface of the precast slab, and the other end of the grouting guide pipe is communicated with the steel beam and a gap between the precast slabs.
Through adopting above-mentioned technical scheme, when the prefabricated plate is vertical to be fixed in on the girder steel, through high-pressure slip casting, the concrete is impressed the steel sleeve and the space between girder steel and the prefabricated plate through the grout pipe to connect prefabricated plate and girder steel into whole, cast-in-place effect is equallyd divide to the effect.
Furthermore, the mounting block is provided with a slurry overflow hole communicated with a gap between the steel beam and the precast slab.
Through adopting above-mentioned technical scheme, the grout condition in space between staff's girder steel and the prefabricated plate can in time be reminded in the setting in excessive thick liquid hole, overflows from excessive thick liquid hole when the thick liquid and can think that the space between girder steel and the prefabricated plate is full in the grout.
Furthermore, the cross section of the slurry overflow hole is in an isosceles trapezoid shape with a narrow upper part and a wide lower part.
By adopting the technical scheme, the cross section of the grout overflow hole is in an isosceles trapezoid shape with a narrow upper part and a wide lower part, and the lower width of the grout overflow hole can facilitate the concrete to enter the grout overflow hole, so that workers can be quickly reminded that the gap between the steel beam and the precast slab is filled with the concrete; and the narrow upper part of the grout overflow hole can reduce the leakage of concrete from the grout overflow hole and reduce the waste of concrete.
Furthermore, a plurality of the steel sleeves are uniformly distributed along the axis direction of the steel beam.
Through adopting above-mentioned technical scheme, steel sleeve evenly distributed along the direction of axis can make between prefabricated plate and the girder steel connection structure atress more even to improve prefabricated plate, girder steel and connection structure's wholeness.
Furthermore, the steel beam comprises an upper plate and a lower plate, a connecting plate is vertically arranged between the lower plate and the upper plate, a stiffening plate is arranged between the lower plate and the upper plate, and the stiffening plate is vertical to the connecting plate.
Through adopting above-mentioned technical scheme, the internal force of prefabricated plate and face external force transmit for the girder steel through the steel sleeve, and the stiffening plate bears the concentrated load of junction as supporting the stiffening rib to reduce the effect that receives of girder steel, avoid the girder steel atress too big to lead to damaging.
To sum up, the utility model discloses a following at least one useful technological effect:
the anchor bolt is rotatably installed in the steel sleeve, concrete is added among the steel sleeve, the precast slab and the steel beam, and the precast slab is connected with the steel beam through internal discrete points;
the connection mode of the anchor bolt sleeve is very convenient and fast, and the process is simple and reliable;
through the setting of stiffening plate, the internal force of prefabricated plate and face external force transmit for the girder steel through the steel sleeve, and the stiffening plate is as supporting the stiffening rib, bears the concentrated load of junction to reduce the effect that receives of girder steel, avoid the girder steel atress too big to lead to damaging.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
fig. 2 is a schematic cross-sectional structure diagram of the present embodiment.
Reference numerals: 1. a steel beam; 101. an upper plate; 102. a lower plate; 103. a connecting plate; 2. prefabricating a slab; 3. a steel sleeve; 4. an anchor bolt; 5. concrete; 6. a stiffening plate; 7. a hole-edge steel bracket; 8. mounting blocks; 9. a groove; 10. grouting a conduit; 11. and (4) slurry overflow holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, for the utility model discloses a connection structure of precast floor and girder steel, including a plurality of girder steels 1, the overlap joint has prefabricated plate 2 between two liang of girder steels 1, has a plurality of ascending steel sleeves 3 of opening at the upper surface of prefabricated plate 2 along its axis direction welding, has seted up the thread line at steel sleeves 3's inside wall, and crab-bolt 4 is installed to the 3 internal rotations of steel sleeves, and the space between steel sleeves 3's the lateral wall and prefabricated plate 2's the relative lateral wall is filled there is concrete 5, and wherein concrete 5 adopts C35 little expanded fine aggregate concrete.
The steel beam 1 comprises an upper plate 101 and a lower plate 102, a connecting plate 103 is vertically welded between the lower plate 102 and the upper plate 101, a stiffening plate 6 is welded between the lower plate 102 and the upper plate 101, and the stiffening plate 6 is also vertical to the connecting plate 103. When the internal force and the external force of the precast slab 2 are transmitted to the steel beam 1 through the steel sleeve 3, the stiffening plate 6 is used as a supporting stiffening rib to bear the concentrated load at the joint, so that the effect of the steel beam 1 is reduced, and the damage caused by the overlarge stress of the steel beam 1 is avoided.
Then, a plurality of steel sleeves 3 are uniformly distributed along the axial direction of the steel beam 1. The steel sleeve 3 is uniformly distributed along the axis direction, so that the stress of the connection structure between the prefabricated slab 2 and the steel beam 1 is more uniform, and the integrity of the prefabricated slab 2, the steel beam 1 and the connection structure is improved.
In order to prevent the concrete 5 from being broken after being stressed, hole-edge steel brackets 7 are installed on opposite sidewalls of the prefabricated panels 2. The capability of the concrete 5 for resisting the tensile force integrally can be improved through the hole edge steel support 7, so that the concrete 5 is prevented from being broken after being stressed.
Wherein, one side integrated into one piece that the steel sleeve 3 was kept away from to crab-bolt 4 has installation piece 8, and installation piece 8 and crab-bolt 4 form the countersunk head crab-bolt, have seted up recess 9 on two adjacent prefabricated plates 2, and two recesses 9 enclose to close and form the countersunk head groove, and installation piece 8 gomphosis is at the countersunk head inslot. Through the gomphosis of installation piece 8 in two recesses 9, can avoid the outstanding upper surface of prefabricated plate 2 of countersunk head crab-bolt, avoid the staff to collide carelessly and lead to the position of crab-bolt 4 to change.
Referring to fig. 2, a grouting guide pipe 10 is opened in the precast slab 2, and one end of the grouting guide pipe 10 is communicated with the upper surface of the precast slab 2 and the other end is communicated with the gap between the steel beam 1 and the precast slab 2. When the prefabricated plate 2 is vertically fixed on the steel beam 1, the anchor bolt 4 is rotated to enable the installation block 8 to be embedded in the groove 9, and through high-pressure grouting, the concrete 5 is pressed into a gap between the steel sleeve 3 and the steel beam 1 and between the prefabricated plate 2 through the grouting guide pipe 10, so that the prefabricated plate 2 and the steel beam 1 are connected into a whole, and the effect is equal to the cast-in-place effect.
Then, a grout overflow hole 11 communicated with a gap between the steel beam 1 and the precast slab 2 is vertically formed on the mounting block 8. When high-pressure grouting is carried out, when slurry overflows from the slurry overflow holes 11, the gap between the steel beam 1 and the precast slab 2 can be considered to be full, and a worker can be reminded to stop grouting.
It is worth mentioning that the cross section of the slurry overflow hole 11 is in an isosceles trapezoid shape with a narrow top and a wide bottom. The cross section of the grout overflow hole 11 is in an isosceles trapezoid shape with a narrow top and a wide bottom, and the concrete 5 can conveniently enter the grout overflow hole 11 due to the wide bottom of the grout overflow hole 11, so that workers can be quickly reminded that the gap between the steel beam 1 and the precast slab 2 is filled with the concrete 5; and the narrow upper part of the grout overflow hole 11 can reduce the leakage of the concrete 5 from the grout overflow hole 11 and reduce the waste of the concrete 5.
The implementation principle of the embodiment is as follows: the anchor bolt 4 is rotatably arranged in the steel sleeve 3, the concrete 5 is added between the steel sleeve 3 and the precast slab 2 and the steel beam 1, and the precast slab 2 is connected with the steel beam 1 through internal discrete points, so that the continuous stress characteristic of the precast slab 2 can be ensured, and the external dimension of the precast slab 2 is not limited to a single slab lattice surrounded by the steel beam 1; the sleeve of the anchor bolt 4 is very convenient and fast in connection mode and simple and reliable in process; the grouting amount is small after the point type connection node is connected, slurry leakage is not easy to occur, and the site is neat and ordered; meanwhile, the method has the advantages of no on-site welding in the assembling process, reduction of wet operation workload and improvement of on-site construction efficiency.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a connection structure of precast floor and girder steel, includes a plurality of girder steels (1), two liang be provided with prefabricated plate (2), its characterized in that between girder steel (1): the steel beam structure is characterized in that a plurality of steel sleeves (3) are arranged on the upper surface of the steel beam (1) along the axis direction of the steel beam, openings of the steel sleeves (3) face upwards, thread lines are arranged on the inner side walls of the steel sleeves (3), anchor bolts (4) are rotatably arranged in the steel beam (1), and concrete (5) is arranged between the outer side walls of the steel sleeves (3) and the opposite side walls of the prefabricated plates (2).
2. A connection structure of a precast floor slab and a steel beam according to claim 1, wherein: and hole edge steel brackets (7) are arranged on the opposite side walls of the precast slab (2).
3. A connection structure of a precast floor slab and a steel beam according to claim 2, wherein: one side of the anchor bolt (4) far away from the steel beam (1) is provided with an installation block (8), and the two adjacent prefabricated plates (2) are provided with grooves (9) for embedding the installation blocks (8).
4. A connection structure of a precast floor slab and a steel beam according to claim 3, wherein: the prefabricated slab (2) is provided with a grouting guide pipe (10), one end of the grouting guide pipe (10) is communicated with the upper surface of the prefabricated slab (2), and the other end of the grouting guide pipe is communicated with a steel beam (1) and a gap between the prefabricated slabs (2).
5. A connection structure of a precast floor slab and steel girder according to claim 4, wherein: and the mounting block (8) is provided with a slurry overflow hole (11) communicated with a gap between the steel beam (1) and the precast slab (2).
6. A connection structure of a precast floor slab and steel girder according to claim 5, wherein: the cross section of the slurry overflow hole (11) is in an isosceles trapezoid shape with a narrow upper part and a wide lower part.
7. A connection structure of a precast floor slab and a steel beam according to claim 1, wherein: the steel sleeves (3) are uniformly distributed along the axis direction of the steel beam (1).
8. A connection structure of a precast floor slab and a steel beam according to claim 1, wherein: the steel beam (1) comprises an upper plate (101) and a lower plate (102), a connecting plate (103) is vertically arranged between the lower plate (102) and the upper plate (101), a stiffening plate (6) is arranged between the lower plate (102) and the upper plate (101), and the stiffening plate (6) is perpendicular to the connecting plate (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020414072.1U CN212026781U (en) | 2020-03-27 | 2020-03-27 | Connecting structure of prefabricated floor slab and steel beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020414072.1U CN212026781U (en) | 2020-03-27 | 2020-03-27 | Connecting structure of prefabricated floor slab and steel beam |
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| Publication Number | Publication Date |
|---|---|
| CN212026781U true CN212026781U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020414072.1U Active CN212026781U (en) | 2020-03-27 | 2020-03-27 | Connecting structure of prefabricated floor slab and steel beam |
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| CN (1) | CN212026781U (en) |
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