CN218028198U

CN218028198U - Full precast floor slab and steel beam connecting structure

Info

Publication number: CN218028198U
Application number: CN202222348992.XU
Authority: CN
Inventors: 祖龙; 刘婷; 李敏
Original assignee: Changsha Broad Homes Industrial Group Co Ltd
Current assignee: Changsha Broad Homes Industrial Group Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-13
Anticipated expiration: 2032-09-05

Abstract

The utility model provides a full precast floor slab and girder steel connection structure. The full precast floor slab and steel beam connecting structure comprises first fixing assemblies arranged at two precast floor slabs, each first fixing assembly comprises a clamp and a first screw rod, each first screw rod vertically penetrates through upper end flange plates of the precast floor slabs and the steel beams, a cover plate abutted against the end face of each precast floor slab is arranged at the upper end of each first screw rod, and a first nut abutted against the upper end face of the lower end flange plate of the steel beam is arranged at the lower end of each first screw rod; the clamp is L-shaped, one side of the L-shaped clamp is used for the first screw to pass through, and the other side of the L-shaped clamp is abutted against the lower end face of the flange plate at the upper end of the steel beam; and the bottom of the clamp is provided with an adjusting piece in threaded connection with the first screw rod. Compared with the prior art, the utility model discloses can realize the overlap joint of full precast floor and girder steel.

Description

Full precast floor slab and steel beam connecting structure

Technical Field

The utility model relates to a construction technical field especially relates to a full precast floor slab and girder steel connection structure.

Background

With the increasing growth of building industrialization, the prefabricated floor slabs are widely applied. The composite floor slab has the advantages of greatly reduced complicated procedures of on-site formwork erecting and formwork removing, and shortened construction period, and is generally applied. The traditional composite floor slabs are provided with truss steel bars to enhance the rigidity of prefabricated components, the deformation of the prefabricated composite bottom plate can be reduced in the hoisting and construction stages, and the capacity of bearing construction load is increased.

At present, the thickness of a domestic prefabricated laminated floor slab is about 130mm generally, the thickness of the prefabricated floor slab is required to be not less than 60mm according to the JGJ1-2014 and 15G366-1, the thickness of the residual cast-in-place layer is only about 60mm and far less than the thickness of the residual cast-in-place layer in foreign countries under the condition that the floor slab is thin, the residual space of a truss is only 20-40 mm, and the influence of manufacturing errors is added, so that the pre-embedding requirement of water and electricity pipelines is difficult to meet, and more troubles are brought to field construction. Meanwhile, the steel content of the truss reinforced composite floor slab is large, even the pre-embedded requirement is reserved for ensuring, the height of the prefabricated composite floor slab is higher than the thickness of a cast-in-place floor slab, the constant load of the floor is increased compared with the same type of cast-in-place project, the self weight of the stair is increased, the construction cost is not reduced or increased due to the factors, and the assembly type building is not popularized favorably.

Therefore, the application of the full precast floor slabs is gradually applied to the market, and the full precast floor slabs are lapped on the superposed beams or the cast-in-place beams on the traditional project, but the research and the application of lapping nodes of the full precast floor slabs and the steel beams are less at present. And the lap joint combination of full precast floor and girder steel can furthest's avoiding wet operation, and the process is less, and the efficiency of construction is high. Therefore, in order to meet the development requirement of the connection of the full precast floor slabs, it is necessary to provide a lap joint structure which can be applied to the full precast floor slabs and the steel beams.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a full precast floor slab and girder steel connection structure can realize the overlap joint of full precast floor slab and girder steel.

The utility model discloses a technical scheme is: a full precast floor slab and steel beam connecting structure comprises first fixing assemblies arranged at two precast floor slabs, wherein each first fixing assembly comprises a clamp and a first screw rod, the first screw rods vertically penetrate through upper end flange plates of the precast floor slabs and the steel beams, the upper ends of the first screw rods are provided with cover plates abutted against the end surfaces of the precast floor slabs, and the lower ends of the first screw rods are provided with first nuts abutted against the upper end surfaces of lower end flange plates of the steel beams; the clamp is L-shaped, one side of the L-shaped clamp is used for the first screw rod to pass through, and the other side of the L-shaped clamp is abutted against the lower end face of the upper end flange plate of the steel beam; and the bottom of the clamp is provided with a first adjusting piece in threaded connection with the first screw rod.

Preferably, the first fixing assembly further comprises a threaded sleeve, a connecting rod and a first bolt, the threaded sleeve is respectively arranged in the end sides of the steel beam and the clamp, one of the first bolt is arranged at each of two ends of the connecting rod in a penetrating manner, the first bolt is connected with the threaded sleeve in the steel beam, and the other bolt is connected with the threaded sleeve in the clamp.

Preferably, the precast floor slab is close to the top of butt joint and is equipped with sunken reinforcing bar groove, apron and reinforcing bar groove's interior bottom surface butt.

Preferably, the edge of one of the two precast floor slabs is provided with a projection, the edge of the other precast floor slab is provided with a groove, and the projection is matched with the groove when in butt joint.

Preferably, the bumps and the grooves are arranged at intervals along the width direction W of the precast floor slab, and the reinforcing steel bar grooves are arranged corresponding to the bumps and the grooves; the convex blocks and the grooves are arranged downwards in the thickness direction of the prefabricated floor slab.

Preferably, the full precast floor slab and steel beam connection structure further comprises a second fixing component for horizontally connecting two butted precast floor slabs at the butt joint seam, and the second fixing components are arranged at intervals in the thickness direction of the precast floor slabs.

Preferably, the second fixing assembly comprises a pre-buried box, a grouting sleeve and a second bolt, the pre-buried box is arranged in one of the prefabricated floor slabs, the grouting sleeve is arranged in the other prefabricated floor slab, and the second bolt horizontally penetrates out of the pre-buried box and is connected with the grouting sleeve.

Preferably, in two second fixed subassemblies in the thickness direction of same prefabricated floor, one of them sets up pre-buried box, and another sets up grout sleeve.

Preferably, full precast floor slab and girder steel connection structure still including be used for at the distolateral third fixed subassembly of being connected precast floor slab and girder steel of precast floor slab, the third fixed subassembly includes clamp plate, second screw rod and second nut, the second nut set firmly in on the girder steel, the one end suit of clamp plate is in on the second screw rod, other end level overhang and with precast floor slab butt, the second screw rod pass the girder steel with the second nut is connected.

Preferably, the end side of the precast floor slab is provided with a pressure groove, and the pressure plate abuts against the pressure groove.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the combination of the fully-prefabricated floor slab and the steel beam greatly reduces the application of on-site wet operation, and compared with a composite floor slab, the combination of the fully-prefabricated floor slab and the steel beam cancels wet operation operations such as post-cast strip and the like, reduces the procedures of formwork supporting, formwork removing and supporting on site, greatly improves the construction efficiency, and is more beneficial to the cleanness of the construction environment on site of a construction site;

2. meanwhile, as the floor is a fully prefabricated component, only part of the abutted seam part needs to be grooved (namely, the lugs and the grooves which are arranged at intervals and the lugs and the grooves are arranged at the lower part in the thickness direction), so that the surface flatness of the floor is greatly improved, the time and the engineering quantity of a plastering process are reduced, and the construction difficulty is reduced;

3. the arrangement of the seam reinforcing steel bars improves the crack resistance of the floor slab seam and improves the friction force and the biting force at the seam;

4. the I-shaped steel beam and the full precast floor slab are connected, all connecting pieces can be customized in a factory, the manufacturing cost is low, the small displacement between the two components can be effectively reduced, the overall performance of the two components is better, the anti-seismic performance of the building is improved, and the service life of the building is prolonged.

Drawings

Fig. 1 is a schematic view of a connection structure of a full precast floor slab and a steel beam provided by the utility model;

FIG. 2 is an enlarged schematic view of the point A in FIG. 1;

FIG. 3 is an enlarged schematic view of B in FIG. 2;

fig. 4 is a schematic top view of two precast floor slabs butted.

In the attached drawings, 1, a floor slab is prefabricated; 11. butt-joint seam; 12. a reinforcing steel bar groove; 13. a bump; 14. a groove; 15. pressing a groove; 2. a steel beam; 3. a first fixed component; 31. a clamp; 32. a first screw; 33. a first nut; 34. a threaded sleeve; 35. a connecting rod; 36. a first bolt; 37. a cover plate; 4. a second stationary component; 41. embedding a box in advance; 42. grouting a sleeve; 43. a second bolt; 5. a third stationary component; 51. pressing a plate; 52. a second screw; 53. a second nut.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence with the upper, lower, left and right directions of the drawings, and do not limit the structure.

As shown in fig. 1, the full precast floor slab and steel beam connection structure provided by this embodiment is used for fixing two butted precast floor slabs 1 and steel beams 2, and the steel beams 2 are arranged at two butt joints 11 of the precast floor slabs 1 and the lower ends of the end sides of the precast floor slabs 1. The steel beam 2 is an I-shaped steel and is provided with a flange plate and a web plate.

As shown in fig. 1 and 4, the precast floor slab 1 is provided with a plurality of recessed tendon grooves 12 on the top adjacent to the butt joints 11, the tendon grooves 12 are long and rectangular, and the tendon grooves 12 are arranged at intervals in the width direction W. The reinforcing steel bar groove 12 is used for placing reinforcing steel bars and then pouring concrete to connect the two butted prefabricated floor slabs 1. The end side of the precast floor slab 1 is provided with a pressing groove 15, and the pressing groove 15 penetrates through the end side of the precast floor slab 1. The plurality of press grooves 15 may be arranged at intervals in the width direction W, and may or may not be provided corresponding to the tendon grooves 12.

As shown in fig. 1 and 4, in two prefabricated floor slabs 1, the edge of one prefabricated floor slab 1 is provided with a projection 13, the edge of the other prefabricated floor slab 1 is provided with a groove 14, and when the two prefabricated floor slabs are butted, the projection 13 is matched with the groove 14. The projections 13 and the grooves 14 are arranged at intervals in the width direction W of the precast floor slab 1, and the tendon grooves 12 are arranged corresponding to the projections 13 and the grooves 14. The projections 13 and the grooves 14 are provided downward in the thickness direction of the precast floor slab 1. The tenon-and-mortise connection structure of the convex block 13 and the groove 14 is adopted, so that the positioning and the assembling are convenient.

As shown in fig. 1, the full precast floor slab and steel beam connection structure includes a first fixing assembly 3, a second fixing assembly 4, and a third fixing assembly 5.

The two ends of the steel beam 2 positioned at the butt joint 11 are respectively provided with one first fixing component 3, and the two first fixing components 3 are symmetrically arranged. Be located and set up a first fixed subassembly 3 on 1 distolateral girder steel 2 of precast floor slab, this first fixed subassembly 3 is close to inboard setting. A plurality of first fixing members 3 may be arranged at intervals in the width W direction of the precast floor slab 1.

As shown in fig. 1 and 2, the first fixing assembly 3 includes a clamp 31, a first screw 32, a first nut 33, a threaded sleeve 34, a connecting rod 35, a first bolt 36, and a cover plate 37.

The first screw rod 32 vertically penetrates through the upper end flange plates of the precast floor slabs 1 and the steel beams 2, and a cover plate 37 abutted against the inner bottom surfaces of the reinforcement grooves 12 of the precast floor slabs 1 is arranged at the upper end of the first screw rod 32. The lower end of the first screw 32 is provided with a first nut 33 which is abutted against the upper end face of the lower end flange plate of the steel beam 2.

The clamp 31 is L-shaped, one side of the L-shape is used for the first screw rod 32 to pass through, and the other side of the L-shape is abutted against the lower end face of the upper end flange plate of the steel beam 2. A first nut 33 (adjusting member) is provided at the bottom of the clamp 31, and the first nut 33 is in threaded connection with the first screw 32. The precast floor slab 1 is closely attached to the steel girder 2 by adjusting the first nut 33 at the bottom of the jig 31 to adjust the clamping force between the jig 31 and the cover plate 37.

The threaded sleeves 34 are provided in the end sides of the steel beam 2 and the clamp 31, respectively. Both ends of the connecting rod 35 are respectively provided with a through hole for the first bolt 36 to pass through. One of the first bolts 36 is connected with the threaded sleeve 34 in the steel beam 2, and the other first bolt 36 is connected with the threaded sleeve 34 in the clamp 31. The fit clearance between the through hole on the connecting rod 35 and the first bolt 36 is designed to be a proper value according to actual needs, and the relative position of the clamp 31 and the steel beam 2 can be fixed through the connecting rod 35 and the first bolt 36 while the first bolt 36 can be ensured to rotate. And the length of the connecting rod 35 is also designed in advance according to actual needs. The second fixing component 4 effectively prevents the clamp 31 from displacing on the steel beam 2, and the balance stress performance of the component is improved.

As shown in fig. 1 and 3, the second fixing member 4 is used to horizontally connect two butted prefabricated floor slabs at a butt joint. The second fixing assemblies 4 are arranged at intervals in the thickness direction of the prefabricated floor slab 1.

The second fixing member 4 includes a pre-buried box 41, a grouting sleeve 42, and a second bolt 43. The embedded box 41 is arranged in one of the prefabricated floor slabs 1, and the grouting sleeve 42 is arranged in the other prefabricated floor slab 1. The second bolt 43 horizontally penetrates out of the embedded box 41 to be connected with the grouting sleeve 42. In two second fixed subassemblies 4 on the same precast floor 1's thickness direction, one of them sets up pre-buried box 41, and the other sets up grout sleeve 42. The second fixing assembly 4 is provided in plurality in the width direction W, and a plurality of second bolts 43 may share the same embedded box 41, or may be provided with one embedded box 41 respectively. The second fixing unit 4 at the upper end may be disposed in the tendon groove 12, fixed by abutting the sidewalls of the two ends of the embedded box 41 against the sidewalls of the tendon groove 12, or embedded between the two tendon grooves 12.

The embedded box 41 is U-shaped, and when installed, the U-shaped opening of the embedded box 41 at the lower end faces downward, and the second bolt 43 and the grouting sleeve 42 are installed and then covered on the steel beam 2. The U-shaped opening of the embedded box 41 at the upper end faces upwards, and the second bolt 43 and the grouting sleeve 42 are installed and then concrete is poured.

As shown in fig. 1, the third fixing member 5 is used to connect the precast floor slab 1 and the steel girder 2 at the end side of the precast floor slab 1. The third fixing assembly 5 includes a pressure plate 51, a second screw 52 and a second nut 53. The second nut 53 is fixedly arranged on the steel beam 2, one end of the pressing plate 51 is sleeved on the second screw rod 52, and the other end of the pressing plate horizontally overhangs and is abutted against the inner bottom surface of the pressing groove 15 of the precast floor slab 1. The second screw 52 passes through the steel beam 2 and is connected with the second nut 53.

After the splicing seam steel bars are placed in the steel bar grooves 12, concrete is poured to form a whole, so that horizontal prestress is increased, and friction force and occlusion force at the splicing seam are improved.

After all the fixing components are installed, concrete is poured in the corresponding embedded boxes 41, the reinforcing steel bar grooves 12 and the pressing grooves 15, compared with the traditional post-pouring wet operation of the laminated floor slab, the operation content of pouring a small part of concrete in the grooves is more convenient, and the adverse effect of the wet operation on the site is greatly reduced. Finally, the fixed component is covered with a decorative surface, so that the surface is smooth and attractive.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A full precast floor slab and steel beam connecting structure is used for fixing two butted precast floor slabs and steel beams, wherein the steel beams are arranged at the butt joint seams of the two precast floor slabs and the lower ends of the end sides of the precast floor slabs; the first fixing assembly comprises a clamp and a first screw rod, the first screw rod vertically penetrates through upper end flange plates of the prefabricated floor slabs and the steel beams, a cover plate abutted against the end faces of the prefabricated floor slabs is arranged at the upper end of the first screw rod, and a first nut abutted against the upper end faces of the lower end flange plates of the steel beams is arranged at the lower end of the first screw rod; the clamp is L-shaped, one side of the L-shaped clamp is used for the first screw rod to pass through, and the other side of the L-shaped clamp is abutted against the lower end face of the upper end flange plate of the steel beam; and the bottom of the clamp is provided with an adjusting piece in threaded connection with the first screw rod.

2. The full precast floor slab and steel beam connection structure according to claim 1, wherein the first fixing assembly further comprises a threaded sleeve, a connecting rod and first bolts, the threaded sleeve is respectively arranged in the end sides of the steel beam and the clamp, one first bolt is arranged at each of two ends of the connecting rod in a penetrating manner, one first bolt is connected with the threaded sleeve in the steel beam, and the other first bolt is connected with the threaded sleeve in the clamp.

3. A fully precast floor slab and steel beam connection structure according to claim 1, wherein the precast floor slab is provided with a recessed reinforcing bar groove at a top portion adjacent to the butt joint, and the cover plate is abutted against an inner bottom surface of the reinforcing bar groove.

4. A fully precast floor slab and steel beam connection structure according to claim 3, wherein the edge of one of the two precast floor slabs is provided with a projection and the edge of the other precast floor slab is provided with a groove, and the projection is fitted with the groove when butted.

5. The fully precast floor slab and steel beam connection structure as claimed in claim 4, wherein the projections and the recesses are arranged at intervals in the width direction W of the precast floor slab, and the reinforcing bar grooves are provided corresponding to the projections and the recesses; the convex blocks and the concave grooves are arranged downwards in the thickness direction of the prefabricated floor slab.

6. The fully precast floor slab and steel beam connection structure according to claim 1, further comprising second fixing units for horizontally connecting two butted precast floor slabs at a butt joint, the second fixing units being provided two at intervals in a thickness direction of the precast floor slabs.

7. The fully-prefabricated floor slab and steel beam connecting structure according to claim 6, wherein the second fixing assembly comprises a pre-buried box, a grouting sleeve and a second bolt, the pre-buried box is arranged in one of the prefabricated floor slabs, the grouting sleeve is arranged in the other prefabricated floor slab, and the second bolt horizontally penetrates out of the pre-buried box to be connected with the grouting sleeve.

8. The full precast floor slab and steel beam connection structure of claim 7, wherein one of the two second fixing assemblies in the thickness direction of the same precast floor slab is provided with an embedded box, and the other one is provided with a grouting sleeve.

9. The fully precast floor slab and steel beam connecting structure according to claim 1, further comprising a third fixing component for connecting the precast floor slab and the steel beam at the end side of the precast floor slab, wherein the third fixing component comprises a pressing plate, a second screw rod and a second nut, the second nut is fixedly arranged on the steel beam, one end of the pressing plate is sleeved on the second screw rod, the other end of the pressing plate horizontally overhangs and abuts against the precast floor slab, and the second screw rod penetrates through the steel beam and is connected with the second nut.

10. The fully precast floor slab and steel beam connection structure according to claim 9, wherein an end side of the precast floor slab is provided with a pressing groove, and the pressing plate abuts on the pressing groove.