Bidirectional stress closely-spliced laminated slab connecting structure

Abstract

The utility model relates to the technical field of assembly type structure construction, aims to solve the problems that an existing connection structure of a two-way laminated plate close splicing seam is prone to cracking, large in steel consumption and high in requirement for the thickness of a post-pouring layer, and provides a two-way stress close splicing laminated plate connection structure which comprises a first laminated plate and a second laminated plate. A protrusion is arranged on one side of the first laminated plate, a groove is formed in one side of the second laminated plate, and the protrusion is inserted into the groove. A pre-embedded connecting piece is pre-embedded in the laminated slab I, and one end of the pre-embedded connecting piece extends out of the front end of the bulge; a reserved joint bar pipeline is arranged in the second laminated slab, and the reserved joint bar pipeline is communicated with the groove; the embedded connecting piece is inserted into the reserved joint bar pipeline; a grouting hole is formed in the top surface of the laminated slab II, and is communicated with the reserved joint bar pipeline; a notch is formed in the top of the plate side of the second laminated plate and communicates with the groove. The connection strength between the laminated slabs is large, the laminated slabs are not prone to cracking, the steel consumption is small, and the requirement for the thickness of a post-pouring layer is low.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled structure construction, in particular to a bidirectional force-bearing densely spliced ​​composite plate connection structure. Background Art

[0002] Under the general environment of urbanization development in my country, prefabricated building structures are increasingly used in construction projects. As a commonly used construction technology in prefabricated building structures in my country, the construction technology of composite panels has the characteristics of light weight, high strength, good durability, high mechanized construction and strong adaptability. The reasonable application of this construction technology can not only optimize the construction environment of the construction site, not produce harmful gases, noise and construction waste, but also avoid the construction quality problems of the construction project to a certain extent, which can greatly improve the efficiency and quality of construction. Therefore, with the continuous development and innovation of the construction industry, composite panels will also have a broader development prospect in the future.

[0003] According to the current standard 15g310-1 "Prefabricated Concrete Connection Node Structure (Floor Slab and Stairs)", the side joint technology of the composite slab can be divided into two categories: post-cast strip joint and close-jointed joint. Post-cast strip joint can achieve "equivalent to cast-in-place", with good quality and high strength after forming, but the disadvantage is that the steel bars at the joints of the composite slab are complicated to set, and the "beard bars" have serious collision with the steel bars when the composite slab is installed, which affects the efficiency of on-site construction. In addition, the formwork needs to be supported, which is costly and time-consuming. Close-jointed joints are simple in structure and convenient in construction, and are the direction of development of building industrialization. However, close-jointed joints are generally straight joints, and there are no reinforcements on the side of the slab, which weakens the strength and stiffness of the floor slab; under the action of load, temperature and deformation, the floor slab is prone to cracking along the joints. In the connection structure of the close-jointed joints of the bidirectional composite slabs, in addition to the through straight joints that still exist in the precast slabs, there are also disadvantages such as large steel consumption and high requirements for the thickness of the post-cast layer due to the need to lay steel bars above the close-jointed joints of the composite slabs and cast the post-cast layer.

[0004] The above two composite slab side joint processes each have their own advantages and disadvantages, but compared with the post-cast joint, the close-jointed joint is superior in terms of construction efficiency, construction quality and safety, and has greater room for improvement. Utility Model Content

[0005] The utility model aims to provide a bidirectional force-bearing close-joined composite plate connection structure to solve the problems of easy cracking, large steel consumption and high requirements on the thickness of the post-casting layer in the existing bidirectional composite plate close-joined seam connection structure.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] The utility model provides a bidirectional force-bearing close-jointed composite plate connection structure, comprising a composite plate 1 and a composite plate 2, wherein the plate sides of the composite plate 1 and the composite plate 2 are spliced, a protrusion is provided on one side of the composite plate 1, and a groove is provided on one side of the composite plate 2, wherein the protrusion is inserted into the groove;

[0008] The first composite plate is pre-buried with a pre-buried connector, one end of which extends from the front end of the protrusion; the second composite plate is provided with a reserved reinforcing bar pipe inside, the reserved reinforcing bar pipe is connected with the groove; the pre-buried connector is inserted into the reserved reinforcing bar pipe;

[0009] A grouting hole is provided on the top surface of the second composite plate, the grouting hole is connected to the reserved reinforcing bar pipe, and the grouting hole is used for pouring grout;

[0010] A notch is provided at the top of the plate side of the second composite plate, and the notch is communicated with the groove.

[0011] As the preferred technical solution:

[0012] The grouting hole, the reserved reinforcing bar pipe, the groove and the notch are connected in sequence to form a channel.

[0013] As the preferred technical solution:

[0014] A rectangular groove is provided at the bottom of the sides of the second and first composite plates. The rectangular grooves on the second and first composite plates are butted and spliced ​​to form a sealing groove, and the sealing groove is filled with waterproof material.

[0015] As the preferred technical solution:

[0016] The waterproof material is epoxy mortar.

[0017] As the preferred technical solution:

[0018] The reserved reinforcing bar pipe is a horizontal pipe, and one end of the reserved reinforcing bar pipe is connected to the groove.

[0019] As the preferred technical solution:

[0020] The embedded connecting piece is an embedded steel bar, one end of which is embedded in the interior of the composite plate 1, and the other end of which extends horizontally from the protrusion and is inserted into the reserved dowel pipe.

[0021] As the preferred technical solution:

[0022] A plurality of protrusions are arranged at intervals on one side of the first superimposed plate, and a plurality of grooves are arranged at intervals on one side of the second superimposed plate accordingly, and the protrusions are inserted into the corresponding grooves.

[0023] As the preferred technical solution:

[0024] A plurality of pre-embedded connectors are pre-embedded on the composite plate, and one pre-embedded connector is correspondingly arranged at each protrusion; each of the grooves is correspondingly connected to one of the reserved dowel pipes; and the pre-embedded connector is inserted into the corresponding reserved dowel pipe.

[0025] As the preferred technical solution:

[0026] A plurality of grouting holes are provided at intervals on the top surface of the second composite plate, and the grouting holes are communicated with the corresponding reserved reinforcing bar pipes.

[0027] As the preferred technical solution:

[0028] The grouting holes are vertical holes opened vertically.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0030] The connection structure of the utility model increases the connection area of ​​the composite plate one and the composite plate two, and forms a rigid connection structure at the joint by pre-embedded steel bars and the slurry between the two, so as to connect the composite plate one and the composite plate two together, making the connection between the two more reliable. Compared with the existing close-jointed joints that are straight seams and have no reinforcement on the side of the plate, the utility model changes the form of the joints, increases the connection strength between the composite plates, and the composite plates are not easy to crack along the joints; and the utility model does not need to lay additional steel bars on the composite plates, uses less steel, and has low requirements for the thickness of the post-casting layer. It is conducive to the construction of large-area composite plates, especially convenient for the construction of the joints of bidirectional composite plates, and solves the quality control problem of the composite plates being easy to crack at the joints. It can basically prevent leakage of concrete during pouring and reduce concrete waste.

[0031] Compared with the existing post-casting joint method, the utility model splices the composite panels and then performs grouting, and there is no need to support the joint formwork. The construction efficiency is high, the construction quality is high, the cost of supporting the formwork and the workload of supporting the formwork are saved, the construction cost is reduced, and the construction period is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the composite plate 1 and the composite plate 2 before being connected according to the utility model.

[0033] Figure 2 It is a cross-sectional view of the composite plate 1 and the composite plate 2 described in the utility model before being connected.

[0034] Figure 3It is a structural schematic diagram of the bidirectional force-bearing close-jointed composite plate connection structure described in the utility model.

[0035] Figure 4 It is a cross-sectional view of the bidirectional force-bearing close-jointed composite plate connection structure described in the utility model.

[0036] Figure 5 It is a top view of the bidirectional force-bearing close-jointed composite plate connection structure described in the utility model.

[0037] Icons: 1- composite plate one, 2- composite plate two, 3- protrusion, 4- groove, 5- embedded steel bars, 6- reserved reinforcing bar pipe, 7- grouting hole, 8- notch, 9- rectangular groove, 10- waterproof material. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Example 1

[0040] like Figure 1-Figure 5 As shown, this embodiment proposes a bidirectional force-bearing close-jointed composite plate connection structure, including a composite plate 1 and a composite plate 2, the plate sides of the composite plate 1 and the composite plate 2 are spliced, specifically, a protrusion 3 is provided on one side of the composite plate 1, and a groove 4 is provided on one side of the composite plate 2, the protrusion 3 is used to be inserted into the groove 4, the protrusion 3 is adapted to the groove 4, and the protrusion 3 and the groove 4 are engaged with each other.

[0041] Pre-embedded steel bars 5 are pre-embedded on the composite plate 1 , one end of the pre-embedded steel bars 5 is embedded in the interior of the composite plate 1 , and the other end of the pre-embedded steel bars 5 extends horizontally from the protrusion 3 .

[0042] The second composite plate 2 is provided with a reserved reinforcing bar pipe 6, which is connected to the groove 4. Specifically, the reserved reinforcing bar pipe 6 is located inside the second composite plate 2, and the reserved reinforcing bar pipe 6 is a horizontal pipe, and the outer end of the reserved reinforcing bar pipe 6 is connected to the inner side of the groove 4. After the embedded steel bar 5 extends into the groove 4, it is just inserted into the reserved reinforcing bar pipe 6.

[0043] In this embodiment, a plurality of protrusions 3 are arranged at intervals on one side of the composite plate 1, and a plurality of grooves 4 are arranged at intervals on one side of the composite plate 2. Each protrusion 3 is inserted into the corresponding groove 4, and the composite plate 1 and the composite plate 2 are spliced ​​together. A pre-embedded steel bar 5 is arranged at each protrusion 3, and each groove 4 is connected to a reserved reinforcing bar pipe 6, and each pre-embedded steel bar 5 is inserted into the corresponding reserved reinforcing bar pipe 6.

[0044] Furthermore, a plurality of grouting holes 7 are provided at intervals on the top surface of the composite plate 2, and the grouting holes 7 are vertically opened. The lower end of each grouting hole 7 is respectively connected to one of the reserved rebar insertion pipes 6, and grouting is performed from the grouting holes 7 into the reserved rebar insertion pipes 6. The grouting is filled in the reserved rebar insertion pipes 6, and after the grouting solidifies, the embedded steel bars 5 are connected to the composite plate 2.

[0045] Furthermore, a plurality of notches 8 are provided at intervals on the top of the plate side of the composite plate 2, and the notches 8 are connected to the corresponding grooves 4. Due to the notches 8, the groove walls on both sides of the grooves 4 have different widths; the grouting holes 7, the reserved reinforcing bar pipes 6, the grooves 4, and the notches 8 are connected in sequence to form a channel. After the grouting holes 7 are filled with slurry, the slurry will enter the reserved reinforcing bar pipes 6 and the grooves 4. When the slurry overflows from the notches 8, it means that the slurry fills the entire channel. In this way, the slurry between the composite plate 2 and the composite plate 1 can be ensured to be densely filled and reliably connected. At this time, the lower part of the plate side of the composite plate 2 is directly seamlessly spliced ​​with the lower part of the plate side of the composite plate 1.

[0046] Furthermore, in order to ensure the waterproof effect of the overall bottom of the composite board 2 and the composite board 1 after being assembled, a rectangular groove 9 is opened at the bottom of the composite board 2 and the composite board 1 side respectively, and the rectangular grooves 9 on the composite board 2 and the composite board 1 are connected and assembled to form a sealing groove, and the sealing groove is filled with waterproof material 10, such as epoxy mortar, to seal the joints at the bottom of the composite board 2 and the composite board 1.

[0047] In the bidirectional force-bearing close-joined composite plate connection structure of the utility model, the joint between the composite plate 1 and the composite plate 2 is not a straight joint, but is formed by inserting a plurality of protrusions 3 and grooves 4 arranged at intervals to form an inserted joint structure, and the joint between the composite plate 1 and the composite plate 2 is a complex folded line joint; the utility model extends the embedded steel bar 5 horizontally from each protrusion 3 and inserts it into the reserved inserted steel bar pipe 6 on the composite plate 2, the embedded steel bar 5 extends into the interior of the composite plate 2, and then cleverly designs the grouting hole 7 on the composite plate 2, so as to specifically grout the pre-embedded steel bar 5. The inserted steel bar pipe 6 is reserved for grouting. Since a notch 8 is provided at the top of the side of the composite plate 2, the notch 8 is connected to the groove 4, and the groove 4 is connected to the reserved inserted steel bar pipe 6. After grouting from the grouting hole 7, the slurry fills the reserved inserted steel bar pipe 6 and the groove 4, and stops grouting after overflowing from the notch 8. The above structure increases the connection area of ​​the composite plate 1 and the composite plate 2, and forms a rigid connection structure at the joint by pre-embedded steel bars 5 and the slurry between the two, connecting the composite plate 1 and the composite plate 2 together, making the connection between the two more reliable. Compared with the existing close-joined joints that are straight seams and have no steel bars on the plate side, the utility model changes the form of the joint, sets pre-embedded steel bars 5, and designs the plug-in structure form of the composite plate 1 and the composite plate 2, which increases the connection strength between the composite plates, and the composite plates are not easy to crack along the joint; and the utility model does not need to arrange additional steel bars on the composite plates, the steel consumption is small, and the thickness of the post-casting layer is low. Compared with the existing post-casting strip joint method, the utility model splices the composite panels and then performs grouting, and there is no need to set up formwork, so the construction efficiency is high, the construction quality is high, the cost of setting up formwork is saved, and the construction cost is reduced.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bidirectional force-bearing close-jointed composite plate connection structure, characterized in that: It comprises a laminated plate 1 and a laminated plate 2, the plate sides of the laminated plate 1 and the laminated plate 2 are spliced, one side of the laminated plate 1 is provided with a protrusion, one side of the laminated plate 2 is provided with a groove, and the protrusion is inserted into the groove; The first composite plate is pre-buried with a pre-buried connector, one end of which extends from the front end of the protrusion; the second composite plate is provided with a reserved reinforcing bar pipe inside, the reserved reinforcing bar pipe is connected with the groove; the pre-buried connector is inserted into the reserved reinforcing bar pipe; A grouting hole is provided on the top surface of the second composite plate, the grouting hole is connected to the reserved reinforcing bar pipe, and the grouting hole is used for pouring grout; A notch is provided at the top of the plate side of the second composite plate, and the notch is communicated with the groove.

2. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 1 is characterized in that: The grouting hole, the reserved reinforcing bar pipe, the groove and the notch are connected in sequence to form a channel.

3. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 1 is characterized in that: A rectangular groove is provided at the bottom of the sides of the second and first composite plates. The rectangular grooves on the second and first composite plates are butted and spliced ​​to form a sealing groove, and the sealing groove is filled with waterproof material.

4. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 3 is characterized in that: The waterproof material is epoxy mortar.

5. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 1 is characterized in that: The reserved reinforcing bar pipe is a horizontal pipe, and one end of the reserved reinforcing bar pipe is connected to the groove.

6. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 5 is characterized in that: The embedded connecting piece is an embedded steel bar, one end of which is embedded in the interior of the composite plate 1, and the other end of which extends horizontally from the protrusion and is inserted into the reserved dowel pipe.

7. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 1 is characterized in that: A plurality of protrusions are arranged at intervals on one side of the first superimposed plate, and a plurality of grooves are arranged at intervals on one side of the second superimposed plate accordingly, and the protrusions are inserted into the corresponding grooves.

8. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 7 is characterized in that: A plurality of pre-embedded connectors are pre-embedded on the composite plate, and one pre-embedded connector is correspondingly arranged at each protrusion; each of the grooves is correspondingly connected to one of the reserved dowel pipes; and the pre-embedded connector is inserted into the corresponding reserved dowel pipe.

9. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 8, characterized in that: A plurality of grouting holes are provided at intervals on the top surface of the second composite plate, and the grouting holes are communicated with the corresponding reserved reinforcing bar pipes.

10. The bidirectional force-bearing close-jointed composite plate connection structure according to claim 9, characterized in that: The grouting holes are vertical holes opened vertically.

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