Bottom plate of two-way laminated slab with pre-pressed abutted seam

Abstract

The utility model relates to a two-way laminated slab bottom plate with a pre-pressed abutted seam, which comprises a laminated slab bottom plate I for use and a laminated slab bottom plate II spliced at one side of the laminated slab bottom plate I, and further comprises an abutted seam, a post-pouring groove, a limiting block and a limiting groove, and the laminated slab bottom plate I and the laminated slab bottom plate II are spliced to form the abutted seam; post-pouring grooves are formed in the positions, located at the splicing seams, of the first laminated slab bottom plate and the second laminated slab bottom plate, first connecting steel bars are arranged in the positions, located in the post-pouring grooves, of the first laminated slab bottom plate, second connecting steel bars are arranged in the positions, located in the post-pouring grooves, of the second laminated slab bottom plate, and external threads are formed in the surfaces of the first connecting steel bars and the surfaces of the second connecting steel bars. The two-way laminated slab bottom plate is novel in structure and ingenious in conception, the two-way laminated slab bottom plate is connected through splicing seams, the problem that the splicing seams are prone to cracking in the using process is solved, the appearance quality and the using performance of a floor slab are improved, and popularization and implementation of building industrialization are facilitated.

Description

Technical Field

[0001] The utility model relates to a composite plate bottom plate, in particular to a bidirectional composite plate bottom plate with pre-pressed joints. Background Art

[0002] An important feature of building industrialization is that building components are prefabricated in factories as much as possible, making full use of the factory's industrial machinery and complete information management. The quality of components prefabricated in factories can often be guaranteed due to their standardized construction and systematic management, and the error level in the construction industry can be moved from "centimeter level" to "millimeter level".

[0003] Horizontal components were among the first to be prefabricated in factories. This is because prefabrication of horizontal components has a minimal impact on the seismic performance of the overall structure, and their fabrication and installation are relatively simple. Currently, the most widely used application of prefabricated horizontal components is in composite floor slabs, which are assembled monolithic slabs composed of a composite base plate and cast-in-place reinforced concrete. The composite base plate is prefabricated in the factory, transported to the site by truck, and then hoisted into place using a tower crane. Pre-buried equipment pipelines are laid on the base plate, followed by the installation of the upper reinforcement mesh of the composite floor, and finally, the cast-in-place concrete on the base plate is poured. The composite base plate serves as both a component of the structural floor slab and a permanent formwork for the cast-in-place reinforced concrete above it.

[0004] Composite floor slabs have good integrity and high rigidity, which can reduce the workload of supporting formwork on the construction site, save labor and turnover materials, and have good economic efficiency. They are an important measure to reduce the cost, speed up the construction period, and ensure the quality of precast concrete buildings. The lower surface of the composite floor slab is flat, which is convenient for the decoration of the finishing layer. It is suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity. The method of composite floor slabs is also relatively mature. There are no special requirements for the plane facade of the single unit. It is very convenient to convert from traditional cast-in-place structure to prefabricated building. The weight of a single prefabricated component of the composite slab bottom plate is relatively light, and conventional tower crane equipment can meet the requirements. The construction speed and construction cost are relatively easy to control.

[0005] Because the influence of factors such as column grid and room division must be comprehensively considered during structural layout, the length and span of the slab are generally relatively large. If only one prefabricated base plate is made for the entire slab, the size of the prefabricated base plate often exceeds the size limit for automobile transportation. Therefore, the composite slab base plate of each load-bearing unit often requires multiple prefabricated base plates to be spliced ​​together, and the composite slab needs to be divided into one-way slabs and two-way slabs according to the joint structure, support structure and aspect ratio of the prefabricated base plate. The two-way slab has a load-bearing function in both directions, the integrity of the slab is good, the force transmission path is determined by the deformation coordination of the slab, the force is very reasonable, and the safety redundancy is high. It should be the first choice of structural designers. However, the connection between the base plates of the two-way composite slabs is usually in the form of a post-cast strip, also known as an integral joint. The structure is complex, the construction is cumbersome, and the steel bars often collide, which seriously restricts the application of two-way composite slabs.

[0006] One-way composite slabs typically use joints to connect the bottom plates. Joints are simple and easy to construct, making them a promising development for the building industry. However, joints cannot transmit the tensile force of the steel bars, resulting in the composite slab bottom plates being unable to withstand forces perpendicular to the joints, preventing the formation of a two-way slab. Applying joints to the connection of two-way composite slab bottom plates is a tireless pursuit for engineers.

[0007] Whether it is a one-way composite slab or a two-way composite slab, the joints are weak points. Although additional structural steel bars are arranged on the joints, because the steel bars are far away from the bottom of the slab, tension will appear at the bottom of the joints before the additional steel bars take effect, and there are no steel bars at the joints that can withstand this tension. Therefore, during use, cracks are prone to occur at the joints, affecting the appearance and use of the building, and in severe cases, it will cause water seepage and leakage. Utility Model Content

[0008] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a bidirectional composite board bottom plate with pre-stressed joints, which effectively solves the problems mentioned in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solution: the utility model includes a composite plate bottom plate for use and a composite plate bottom plate second spliced ​​on one side of the composite plate bottom plate, and also includes a splicing seam, a post-cast groove, a first connecting steel bar, a second connecting steel bar, an external thread, a distribution steel bar, a connecting block, a nut, a first through hole, a second through hole, a third through hole, a limit block and a limit groove. The composite plate bottom plate one and the composite plate bottom plate two are spliced ​​together to form a splicing seam, and the composite plate bottom plate one and the composite plate bottom plate two are both provided with a post-cast groove at the position of the splicing seam, the composite plate bottom plate one is provided with a first connecting steel bar in the post-cast groove, the composite plate bottom plate two is provided with a second connecting steel bar in the post-cast groove, the surfaces of the first connecting steel bar and the second connecting steel bar are provided with external threads, a plurality of distribution steel bars are provided on the surface of the splicing seam, a connecting block is inserted into the inside of the post-cast groove, nuts are screwed on the first connecting steel bar and the second connecting steel bar on both sides of the connecting block, and limit blocks are provided at both ends of the connecting block.

[0010] Preferably, the connecting block is provided with a first through hole at a position corresponding to the first connecting steel bar.

[0011] Preferably, a second through hole is provided in the connection block at a position corresponding to the second connecting steel bar.

[0012] Preferably, a third through hole is provided in the connection block at a position corresponding to the distribution steel bars.

[0013] Preferably, limiting grooves are provided at positions corresponding to the limiting blocks on the first and second composite plate bottom plates.

[0014] Preferably, concrete is poured into the post-cast groove after installation is completed.

[0015] Beneficial effects: The utility model has a novel structure and ingenious conception. It uses joint connections on the connection of the bottom plates of the two-way composite slabs, and solves the problem that the joints are prone to cracking during use, improves the visual quality and performance of the floor slabs, and is conducive to the promotion and implementation of building industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the first connecting steel bar arrangement structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the second connecting steel bar arrangement structure of the present utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the connecting block of the utility model;

[0021] Numbers in the figure: 1. Composite slab bottom plate 1; 2. Composite slab bottom plate 2; 3. Splicing seam; 4. Post-cast groove; 5. First connecting steel bar; 6. Second connecting steel bar; 7. External thread; 8. Distribution steel bar; 9. Connecting block; 10. Nut; 11. First through hole; 12. Second through hole; 13. Third through hole; 14. Limit block; 15. Limit groove. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 The specific implementation methods of the present utility model are further described in detail.

[0023] Embodiment 1, by Figure 1-4 The utility model provides a bidirectional composite slab bottom plate with pre-stressed joints, including a composite slab bottom plate 1 for use and a composite slab bottom plate 2 spliced ​​on one side of the composite slab bottom plate 1, and also includes a splicing seam 3, a post-cast groove 4, a first connecting steel bar 5, a second connecting steel bar 6, an external thread 7, a distribution steel bar 8, a connecting block 9, a nut 10, a first through hole 11, a second through hole 12, a third through hole 13, a limit block 14 and a limit groove 15. The composite slab bottom plate 1 and the composite slab bottom plate 2 are spliced ​​to form a splicing seam 3. The composite slab bottom plate 1 and the composite slab bottom plate 2 are spliced ​​to form a splicing seam 3. The two 2 are both provided with post-cast grooves 4 at the positions of the splicing seams 3, the composite plate bottom plate 1 is provided with a first connecting steel bar 5 in the post-cast groove 4, the composite plate bottom plate 2 is provided with a second connecting steel bar 6 in the post-cast groove 4, the surfaces of the first connecting steel bar 5 and the second connecting steel bar 6 are provided with external threads 7, a number of distribution steel bars 8 are provided on the surface of the splicing seam 3, a connecting block 9 is inserted into the inside of the post-cast groove 4, and nuts 10 are screwed on the first connecting steel bar 5 and the second connecting steel bar 6 on both sides of the connecting block 9, and limit blocks 14 are provided at both ends of the connecting block 9.

[0024] A first through hole 11 is formed in the connection block 9 at a position corresponding to the first connection steel bar 5 , so as to facilitate the passage of the first connection steel bar 5 .

[0025] A second through hole 12 is provided in the connection block 9 at a position corresponding to the second connection steel bar 6 to facilitate the passage of the second connection steel bar 6 .

[0026] A third through hole 13 is provided in the connection block 9 at a position corresponding to the distribution steel bar 8 to facilitate the passage of the distribution steel bar 8 .

[0027] Limiting grooves 15 are provided on the laminated plate bottom plate 1 and the laminated plate bottom plate 2 at positions corresponding to the limiting blocks 14 , so as to facilitate the placement and limiting of the limiting blocks 14 .

[0028] After the installation is completed, concrete is poured into the post-cast groove 4 to facilitate pouring.

[0029] Working principle: When the utility model is spliced, the connecting block 9 is placed in the post-cast groove 4 of the composite plate bottom plate 1 and the composite plate bottom plate 2, and the limit block 14 on the connecting block 9 is located in the limit groove 15. The set limit block 14 and the limit groove 15 can limit the connecting block 9 to a certain extent. When the composite plate bottom plate 1 and the composite plate bottom plate 2 are spliced, the first connecting steel bar 5 on the composite plate bottom plate 1 is inserted into the first through hole 11, and the second connecting steel bar 6 on the composite plate bottom plate 2 is inserted into the second through hole 12 of the connecting block 9. The first connecting steel bar 5 and the second connecting steel bar 6 are located on both sides of the connecting block 9 and screwed. The cap 10 is fixed, and then the distribution steel bar 8 is passed through the third through hole 13 on the connecting block 9, and then concrete is poured into the back-cast groove 4. In this way, the setting connection block 9 applies tension to the steel bar at the same time as the first connecting steel bar 5 and the second connecting steel bar 6. This tension will generate pre-pressure in the concrete at the splicing seam 3. The pre-pressure can ensure that the splicing seam 3 remains in a compressed state during the later use process, avoiding the splicing seam 3 from cracking. The distribution steel bar 8 and the embedded equipment pipelines and upper steel bars in the two-way composite plate, the distribution steel bar 8 and the first connecting steel bar 5 and the second connecting steel bar on the splicing seam are all stress-bearing steel bars of the bottom plate of the two-way composite plate.

[0030] Beneficial effects: The utility model has a novel structure and ingenious conception. It uses joint connections on the connection of the bottom plates of the two-way composite slabs, and solves the problem that the joints are prone to cracking during use, improves the visual quality and performance of the floor slabs, and is conducive to the promotion and implementation of building industrialization.

[0031] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and appropriate controllers and encoders should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, in which the electrical components are electrically connected in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bidirectional composite board bottom plate with pre-stressed joints, comprising a composite board bottom plate (1) for use and a composite board bottom plate (2) spliced ​​on one side of the composite board bottom plate (1), characterized in that: The invention also includes a splicing seam (3), a post-cast groove (4), a first connecting steel bar (5), a second connecting steel bar (6), an external thread (7), a distribution steel bar (8), a connecting block (9), a nut (10), a first through hole (11), a second through hole (12), a third through hole (13), a limit block (14) and a limit groove (15). The composite plate bottom plate 1 (1) and the composite plate bottom plate 2 (2) are spliced ​​to form a splicing seam (3). The composite plate bottom plate 1 (1) and the composite plate bottom plate 2 (2) are both provided with a post-cast groove (4) at the position of the splicing seam (3). The composite plate bottom plate 1 ( 1) A first connecting steel bar (5) is provided in a post-cast groove (4), a second connecting steel bar (6) is provided in the post-cast groove (4) of the composite slab bottom plate 2, external threads (7) are provided on the surfaces of the first connecting steel bar (5) and the second connecting steel bar (6), a plurality of distribution steel bars (8) are provided on the surface of the joint (3), a connecting block (9) is inserted into the interior of the post-cast groove (4), nuts (10) are screwed onto the first connecting steel bar (5) and the second connecting steel bar (6) on both sides of the connecting block (9), and limit blocks (14) are provided at both ends of the connecting block (9).

2. The bidirectional composite slab bottom plate with pre-stressed seams according to claim 1, characterized in that: The connecting block (9) is provided with a first through hole (11) at a position corresponding to the first connecting steel bar (5).

3. The bidirectional composite slab bottom plate with pre-stressed seams according to claim 1, characterized in that: The connecting block (9) is provided with a second through hole (12) at a position corresponding to the second connecting steel bar (6).

4. The bidirectional composite slab bottom plate with pre-stressed seams according to claim 1, characterized in that: The connection block (9) is provided with a third through hole (13) at a position corresponding to the distribution steel bar (8).

5. The bidirectional composite slab bottom plate with pre-stressed seams according to claim 1, characterized in that: The first and second laminated plate bottom plates (1) and (2) are provided with limiting grooves (15) at positions corresponding to the limiting blocks (14).

6. The bidirectional composite slab bottom plate with pre-stressed seams according to claim 1, characterized in that: After the installation is completed, concrete is poured into the post-cast groove (4).

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