Precast beam structure

Abstract

The utility model relates to the technical field of precast beam structures, in particular to a precast beam structure. According to the technical scheme, the connecting structure comprises at least two steel beams, a first connecting assembly and a second connecting assembly are installed between the two steel beams, concrete slabs are installed on the steel beams, the connecting structure further comprises a plurality of connecting pieces fixedly installed in the concrete slabs, and shear nails are installed in the connecting pieces in a sliding mode. The concrete slab can be fixed on the steel beam through the connecting piece, and the steel beam and the concrete slab can be fixed more stably through the fixed connection of the connecting piece and the steel bar frame, so that the overall performance and the connecting effect of the structure can be obviously improved. The connecting piece is directly and fixedly connected with the concrete slab, so that holes do not need to be formed in the concrete slab, secondary pouring of the concrete slab is avoided, and the construction efficiency can be remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to precast beam structure technical field especially relates to a precast beam structure. BACKGROUND

[0002] The precast composite beam is a structural element that combines steel beams with concrete slabs through shear connectors, widely used in bridges, buildings and other engineering structures. The precast composite beam is a composite structural beam composed of steel beams and concrete slabs, where the concrete slabs are fixed on the steel beams through shear connectors (such as shear studs), and both work together to bear the load. The precast composite beam is composed of steel beams, concrete slabs and shear connectors. The steel beams are usually made of steel and are responsible for bearing tensile, compressive, bending and shear forces. The concrete slabs are cast on top of the steel beams, providing compressive strength and increasing the overall stiffness of the structure. Shear connectors, such as shear studs, are used to connect the concrete slabs to the steel beams, ensuring the transfer of shear forces between the two.

[0003] When connecting the precast concrete slab with the steel beam, it is necessary to reserve corresponding holes in the process of precasting the concrete slab according to the position of the shear stud. The diameter of the hole should be slightly larger than the diameter of the shear stud so that the shear stud can pass through the hole when the concrete slab is installed. After the shear stud enters the hole on the concrete slab, high-strength mortar or other joint materials need to be poured at the joint between the shear stud and the concrete slab to ensure the firm connection between the shear stud and the concrete. Therefore, secondary pouring is required after the connection is completed, which is not conducive to improving construction efficiency and cannot connect the shear stud with the steel bars inside the precast concrete slab. Connecting the shear stud fixedly installed on the composite beam with the steel bars inside the precast concrete slab can significantly improve the overall performance and connection effect of the structure. This connection method will prolong the construction period and is not conducive to improving the engineering quality. SUMMARY

[0004] The utility model aims at the problems in the background art and proposes a precast beam structure and construction method.

[0005] The utility model proposes a precast beam structure, which comprises at least two steel beams, a first connecting assembly and a second connecting assembly installed between the two steel beams, and a concrete slab installed on the steel beam, further comprising:

[0006] A plurality of connecting pieces fixedly installed in the concrete slab, a plurality of connecting holes provided on the steel beam, a shear stud slidingly installed in the connecting piece, the shear stud being fixedly connected with the steel beam through the connecting hole, the connecting piece protecting the shear stud, and a fixing mechanism provided in the shear stud for limiting the shear stud.

[0007] Optionally, the connecting piece is internally provided with a sliding groove, the shear nail is slidingly installed in the sliding groove, the top of the sliding groove is provided with a plurality of first limiting holes, and the bottom of the sliding groove is provided with a plurality of second limiting holes.

[0008] Optionally, the fixing mechanism comprises a mounting groove arranged on the shear nail close to the top end, a plurality of limiting blocks are slidingly installed in the mounting groove, the limiting blocks penetrate through one side of the shear nail and extend to the outside of the shear nail, a driving disc is rotationally installed in the mounting groove, a first driving rod is fixedly installed on the limiting block, the first driving rod is slidingly connected with the shear nail, a connecting rod is rotationally installed on the first driving rod, the other end of the connecting rod is rotationally connected with the driving disc, and the shear nail is provided with a driving rod piece for driving the driving disc to rotate and fixing the driving disc.

[0009] Optionally, the shear nail is provided with a protection hole, the driving rod piece comprises a second driving rod threadedly connected in the protection hole, a telescopic rod is fixedly installed on the second driving rod, the telescopic rod is coaxially fixedly connected with the driving disc, and a plugging plug is movably installed on the protection hole and plugs the protection hole.

[0010] Optionally, the shear nail is provided with an external thread, and a fastening nut is threadedly connected on the external thread.

[0011] Optionally, the reinforcing plate group comprises support plates fixedly installed on two steel beams close to the connecting portion, the support plates are provided with through holes for the shear nails to pass through, the support plates are fixedly connected with the steel beams through the shear nails, the fastening nuts and the concrete plates, one positioning plate is fixedly installed on the two support plates, and the positioning plate is fixedly connected with the two support plates through a bolt connecting piece.

[0012] Optionally, the concrete plate comprises a steel reinforcement frame and concrete poured on the steel reinforcement frame, and the connecting piece is fixedly connected with the steel reinforcement frame.

[0013] Optionally, the first connecting assembly comprises a first lower connecting plate and two second lower connecting plates, a plurality of lower connecting bolts are movably installed on the second lower connecting plates, the lower connecting bolts penetrate through the second lower connecting plates, the steel beams and the first lower connecting plate, and lower fastening nuts are threadedly connected on the lower connecting bolts.

[0014] Optionally, the second connecting assembly comprises two side connecting plates, the two side connecting plates are located on the two sides of the steel beam, side connecting bolts are movably installed on the side connecting plates, the side connecting bolts penetrate through the side connecting plates and the steel beam, and side fastening nuts are threadedly connected on the side connecting bolts.

[0015] In summary, the present application has at least one of the following beneficial technical effects:

[0016] The utility model discloses a connecting piece can fix concrete slab on steel beam, and through connecting piece and reinforcing bar frame fixed connection, can make steel beam and concrete slab keep more stable fixed effect of fixed effect, can improve the overall performance and connection effect of structure significantly.

[0017] Further, through the fixed connection of the support plate and the positioning plate, the adjacent concrete slab can be fixed and connected, thereby further improving the integrity between the multiple concrete slabs and the stability of the steel beam. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Give the structure diagram of prefabricated beam structure Figure 1 ;

[0019] Figure 2 Give the structure diagram of prefabricated beam structure Figure 2 ;

[0020] Figure 3 For the utility model Figure 2 A part of the enlarged view in the middle of B is shown.

[0021] Figure 4 Give the structure diagram of prefabricated beam structure Figure 3 ;

[0022] Figure 5 For the structure diagram of the utility model concrete slab.

[0023] Figure 6 For the internal structure diagram of the utility model connecting piece.

[0024] Figure 7 For the structure diagram of the utility model external thread.

[0025] Figure 8 For the utility model Figure 6 A part of the enlarged view in the middle of B is shown.

[0026] Figure 9 For the utility model Figure 7 A part of the enlarged view in the middle of C is shown.

[0027] 1, steel beam; 2, first lower connecting plate; 201, second lower connecting plate; 202, lower connecting bolt; 203, lower fastening nut; 3, side connecting plate; 301, side connecting bolt; 302, side fastening nut; 4, concrete slab; 401, reinforcing frame; 402, concrete; 5, connecting piece; 501, first limiting hole; 502, second limiting hole; 503, sliding groove; 504, shear pin; 505, mounting groove; 506, limiting block; 507, driving disc; 508, first driving rod; 509, connecting rod; 510, telescopic rod; 511, protection hole; 512, second driving rod; 513, external thread; 514, fastening nut; 515, plugging plug. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be further described below in combination with the drawings and specific embodiments.

[0029] EMBODIMENT

[0030] As Figures 1-3 shown in the utility model provides a kind of precast beam structure, including at least two steel beams 1, first connecting assembly and second connecting assembly are installed between two steel beams 1, and two steel beams 1 can be fixedly connected by first connecting assembly and second connecting assembly.

[0031] Wherein, first connecting assembly includes a first lower connecting plate 2 and two second lower connecting plates 201, and a plurality of lower connecting bolts 202 are movably installed on the second lower connecting plate 201, the lower connecting bolt 202 penetrates the second lower connecting plate 201, the steel beam 1 and the first lower connecting plate 2, and the lower connecting bolt 202 is threadedly connected with the lower fastening nut 203. When two steel beams 1 are fixedly connected, first adjust the position of two steel beams 1, place two second lower connecting plates 201 and first lower connecting plate 2 in the center of steel beam 1 connecting place after aligning two steel beams 1, and make second lower connecting plate 201 be above the lower side of steel beam 1, make first lower connecting plate 2 be placed at the bottom of steel beam, then pass through second lower connecting plate 201 and first lower connecting plate 2 and steel beam 1 by lower connecting bolt 202, then fix second lower connecting plate 201 and first lower connecting plate 2 on steel beam 1 by lower fastening nut 203, that is, second lower connecting plate 201 and first lower connecting plate 2 can be used to preliminarily fix steel beam 1.

[0032] The second connecting assembly comprises two side connecting plates 3, which are arranged on the two sides of the steel beam 1. A side connecting bolt 301 is movably arranged on the side connecting plate 3, the side connecting bolt 301 penetrates the side connecting plate 3 and the steel beam 1, and a side fastening nut 302 is threadedly connected to the side connecting bolt 301. The two side connecting plates 3 are arranged at the connecting position of the steel beam 1, and then the two side connecting plates 3 are fixed on the two sides of the steel beam 1 through the side fastening nut 302 and the side connecting bolt 301, so that the steel beam 1 can be further fixed.

[0033] As shown in Figure 5 The steel beam 1 is provided with a concrete slab 4, which comprises a reinforcing frame 401 and concrete 402 poured on the reinforcing frame 401. The connecting piece 5 is fixedly connected with the reinforcing frame 401. The concrete slab 4 can be fixed on the steel beam 1 through the connecting piece 5, and the steel beam 1 and the concrete slab 4 can be more stably fixed through the fixed connection between the connecting piece 5 and the reinforcing frame 401, which can significantly improve the overall performance and connection effect of the structure. The connecting piece is directly fixedly connected with the concrete slab 4, so that no hole needs to be formed in the concrete slab 4, thereby avoiding secondary pouring of the concrete slab 4.

[0034] As shown in Figures 6-9 The present example also comprises a plurality of connecting pieces 5 fixedly arranged in the concrete slab 4. The steel beam 1 is provided with a plurality of connecting holes. A shear pin 504 is slidably arranged in the connecting piece 5. The connecting piece 5 is provided with a sliding groove 503, and the shear pin 504 is slidably arranged in the sliding groove 503. The shear pin 504 is fixedly connected with the steel beam 1 through the connecting hole. The connecting piece 5 protects the shear pin 504. When the concrete slab 4 is transported and stored, the shear pin 504 is located in the sliding groove 503, so that the shear pin 504 will not be in contact with the outside world, thereby preventing the shear pin 504 from being damaged during transportation and storage. The shear pin 504 is provided with a fixing mechanism for limiting the position of the shear pin 504. The top of the sliding groove 503 is provided with a plurality of first limiting holes 501, and the bottom of the sliding groove 503 is provided with a plurality of second limiting holes 502. The position of the shear pin 504 can be fixed through the cooperation of the fixing mechanism, the first limiting hole 501 and the second limiting hole 502.

[0035] Further, the fixing mechanism comprises a mounting groove 505 arranged on the shear pin 504 close to the top end, a plurality of limiting blocks 506 are slidingly arranged in the mounting groove 505, the limiting blocks 506 penetrate through one side of the shear pin 504 and extend to the outside of the shear pin 504, a driving disc 507 is rotationally arranged in the mounting groove 505, a first driving rod 508 is fixedly arranged on the limiting block 506, the first driving rod 508 is slidingly connected with the shear pin 504, a connecting rod 509 is rotationally arranged on the first driving rod 508, the other end of the connecting rod 509 is rotationally connected with the driving disc 507, and a driving rod member is arranged on the shear pin 504 to drive the driving disc 507 to rotate and fix the driving disc 507. When the limiting block 506 enters the first limiting hole 501 or the second limiting hole 502, the shear pin 504 is limited, when the driving disc 507 rotates, a plurality of connecting rods 509 are driven to rotate, the rotating connecting rods 509 drive a plurality of limiting blocks 506 to synchronously slide, so that a plurality of limiting blocks 506 are synchronously contracted and expanded, and then the limiting block 506 enters or leaves the first limiting hole 501 or the second limiting hole 502. When the limiting block 506 is located in the first limiting hole 501, the shear pin 504 is located in the sliding groove 503, at this time, the shear pin 504 can be prevented from being damaged during transfer, when the limiting block 506 is located in the second limiting hole 502, the shear pin 504 is located outside the connecting piece 5, at this time, the shear pin 504 can be contacted and fixedly connected with the steel beam 1.

[0036] Further, the shear pin 504 is provided with a protection hole 511, the driving rod member comprises a second driving rod 512 which is threadedly connected in the protection hole 511, a telescopic rod 510 is fixedly arranged on the second driving rod 512, the telescopic rod 510 is coaxially fixedly connected with the driving disc 507, through the protection hole 511, the second driving rod 512 can be prevented from being touched by mistake, and the second driving rod 512 can be effectively protected, when the driving disc 507 needs to be rotated, a tool is inserted into the protection hole 511, and the tool is rotated to drive the second driving rod 512 to rotate, and then the telescopic rod 510 is rotated, the rotating telescopic rod 510 drives the driving disc 507 to rotate, and through the threaded connection between the second driving rod 512 and the protection hole 511, since the threaded connection has self-locking property, the driving disc 507 can be prevented from rotating, and then the limiting block 506 can be effectively prevented from leaving the first limiting hole 501 or the second limiting hole 502. A blocking plug 515 is movably arranged on the protection hole 511, and the blocking plug 515 blocks the protection hole 511. Through the blocking of the protection hole 511 by the blocking plug 515, foreign matters can be effectively prevented from blocking the protection hole 511, and the rotation of the second driving rod 512 can be prevented from being interfered by foreign matters.

[0037] The shear pin 504 is provided with an external thread 513, and a fastening nut 514 is threadedly connected to the external thread 513. The shear pin 504 is inserted through the steel beam 1 and is threadedly connected to the external thread 513 through the fastening nut 514, so that the shear pin 504 is fixed on the steel beam 1, and then the concrete slab 4 can be fixed on the steel beam 1.

[0038] The working principle of the embodiment is as follows: when the two steel beams 1 are fixed and connected, first, the positions of the two steel beams 1 are adjusted, the two steel beams 1 are aligned, and then the two second lower connecting plates 201 and the first lower connecting plate 2 are fixed on the steel beams 1, so that the steel beams 1 can be preliminarily fixed through the second lower connecting plates 201 and the first lower connecting plate 2. The two side connecting plates 3 are placed at the connecting positions of the steel beams 1 and are located on the two sides of the steel beams 1, and then the two side connecting plates 3 are fixed on the two sides of the steel beams 1 through the side fastening nuts 302 and the side connecting bolts 301, so that the steel beams 1 can be further fixed.

[0039] The above specific embodiments are only several optional embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A precast beam structure comprising at least two steel beams (1), a first connecting assembly and a second connecting assembly being installed between the two steel beams (1), and a concrete slab (4) being installed on the steel beams (1), characterized in that, Also includes: Multiple connectors (5) are fixedly installed in the concrete slab (4). The steel beam (1) is provided with multiple connection holes. Shear nails (504) are slidably installed in the connectors. The shear nails (504) are fixedly connected to the steel beam (1) through the connection holes. The connectors (5) protect the shear nails (504). The shear nails (504) are provided with a fixing mechanism. The fixing mechanism limits the position of the shear nails (504).

2. The precast beam structure according to claim 1, characterized in that, The connector (5) is provided with a groove (503), and the shear nail (504) is slidably installed in the groove (503). The top of the groove (503) is provided with a plurality of first limiting holes (501), and the bottom of the groove (503) is provided with a plurality of second limiting holes (502).

3. A precast beam structure according to claim 1, characterized in that, The fixing mechanism includes a mounting groove (505) located near the top of the shear nail (504). Multiple limiting blocks (506) are slidably installed in the mounting groove (505). The limiting blocks (506) penetrate one side of the shear nail (504) and extend to the outside of the shear nail (504). A drive disk (507) is rotatably installed in the mounting groove (505). A first drive rod (508) is fixedly installed on the limiting block (506). The first drive rod (508) is slidably connected to the shear nail (504). A connecting rod (509) is rotatably installed on the first drive rod (508). The other end of the connecting rod (509) is rotatably connected to the drive disk (507). The shear nail (504) is provided with a drive rod that drives the drive disk (507) to rotate and fixes the drive disk (507).

4. A precast beam structure according to claim 3, characterized in that, The shear stud (504) is provided with a protective hole (511). The driving rod includes a second driving rod (512) threaded into the protective hole (511). A telescopic rod (510) is fixedly installed on the second driving rod (512). The telescopic rod (510) is coaxially fixedly connected to the driving disc (507). A sealing plug (515) is movably installed on the protective hole (511). The sealing plug (515) seals the protective hole (511).

5. A precast beam structure according to claim 1, characterized in that, The shear stud (504) is provided with an external thread (513), and a fastening nut (514) is threaded onto the external thread (513).

6. A precast beam structure according to claim 1, characterized in that, The concrete slab (4) includes a steel reinforcement frame (401) and concrete (402) poured on the steel reinforcement frame (401), and the connector (5) is fixedly connected to the steel reinforcement frame (401).

7. A precast beam structure according to claim 1, characterized in that, The first connecting assembly includes a first lower connecting plate (2) and two second lower connecting plates (201). Multiple lower connecting bolts (202) are movably installed on the second lower connecting plate (201). The lower connecting bolts (202) pass through the second lower connecting plate (201), the steel beam (1) and the first lower connecting plate (2). A lower fastening nut (203) is threaded onto the lower connecting bolt (202).

8. A precast beam structure according to claim 1, characterized in that, The second connecting assembly includes two side connecting plates (3), which are located on both sides of the steel beam (1). A side connecting bolt (301) is movably installed on the side connecting plate (3), and the side connecting bolt (301) passes through the side connecting plate (3) and the steel beam (1). A side fastening nut (302) is threaded onto the side connecting bolt (301).

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