Connecting joint of concrete modular slotted laminated slab and wall

Abstract

The utility model provides a connection node of a concrete modular slotted laminated slab and a wall, which relates to the field of building construction, and comprises a slotted laminated slab which comprises two prefabricated slotted bottom plates and a cast-in-place top plate, a plurality of horizontal notches are formed in the sides, spliced with each other, of the two prefabricated slotted bottom plates at intervals front and back, the horizontal notches of the two prefabricated slotted bottom plates are in one-to-one correspondence, and the first connecting pieces are arranged in the corresponding horizontal notches of the two prefabricated slotted bottom plates; the double-skin wall comprises two prefabricated wall bodies, and the upper ends of the two prefabricated wall bodies are connected to the lower ends of the sides, provided with the horizontal notches, of the two prefabricated slotted bottom plates correspondingly. The double-skin wall is provided with a second connecting piece, and the second connecting piece, the two prefabricated wall bodies, the first connecting piece and the two prefabricated slotted bottom plates are connected through cast-in-place concrete to form a whole with a cast-in-place top plate. According to the utility model, the integrity and safety of the modular building can be improved, the construction progress is shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a connection node between a concrete modular grooved composite slab and a wall. Background Technique

[0002] In the prior art, the construction method of traditional floor slabs requires formwork support, binding of steel bar meshes and other components at the construction site, and then concrete is poured on site. After the concrete solidifies and reaches a certain strength, the formwork around the columns is removed. Among them, the construction method of casting floor slabs on site has problems such as low construction efficiency, complex processes, and long construction periods. A composite slab is an assembled monolithic floor slab formed by laminating a precast slab and a cast-in-place concrete layer, which improves the problems of pure cast-in-place floor slabs.

[0003] In the prior art, composite slabs usually have extended steel bars (such as a composite slab, a composite slab production device and a production method of a composite slab in CN110509396B), and are connected to walls and the like through the extended steel bars, which affects the convenience of handling. Content of the Utility Model

[0004] The utility model provides a connection node between a concrete modular grooved composite slab and a wall to solve the technical problems raised in the above background technique.

[0005] To solve the above technical problems, the utility model discloses a connection node between a concrete modular grooved composite slab and a wall, including:

[0006] A grooved composite slab, which includes two precast grooved bottom slabs and a cast-in-place top slab. The two precast grooved bottom slabs are spliced at a certain distance along the left-right direction. A plurality of horizontal notches are arranged at intervals before and after on one side where the two precast grooved bottom slabs are spliced with each other. The horizontal notches of the two precast grooved bottom slabs correspond one by one, and a connecting piece one is arranged in the corresponding horizontal notches of the two precast grooved bottom slabs;

[0007] A double-skin wall, which includes two precast walls. The upper ends of the two precast walls are respectively connected to the lower ends of one side where the horizontal notches are arranged on the two precast grooved bottom slabs; the double-skin wall is provided with a connecting piece two,

[0008] The connecting piece two, the two precast walls, the connecting piece one and the two precast grooved bottom slabs are connected by cast-in-place concrete to form an integral body with a cast-in-place top slab.

[0009] Preferably, the connecting piece one is a lapping steel bar one;

[0010] The precast grooved bottom slab is provided with a steel bar structure one, and the steel bar structure one includes: a plurality of transverse steel bars one arranged at intervals left and right, and a longitudinal steel bar one is arranged below the transverse steel bars one; the longitudinal direction is the left-right direction, and the transverse direction is the front-back direction;

[0011] A steel bar structure two is arranged in the cast-in-place roof slab. The steel bar structure two includes: a number of transverse steel bars two arranged at intervals left and right, and longitudinal steel bars two are arranged on the upper side of the transverse steel bars two;

[0012] The arrangement position of the horizontal notch in the front-back direction of the horizontal plane is staggered from the longitudinal steel bar one.

[0013] Preferably, a total of 3 horizontal notches are arranged on one side of the precast grooved bottom plate, and the front-back distance between adjacent horizontal notches in the front-back direction is 150 mm;

[0014] Both the transverse steel bar one and the longitudinal steel bar one adopt HRB400 with a diameter of 8 mm as the stress-bearing steel bars. The front-back distance between adjacent longitudinal steel bars one in a single precast grooved bottom plate is 150 mm. The left-right distance between adjacent transverse steel bars one at non-horizontal-notch positions in a single precast grooved bottom plate is 150 mm. The left-right distance between adjacent transverse steel bars one at the horizontal notch in a single precast grooved bottom plate is shortened to 112 mm. The longitudinal steel bar one is disconnected at the joint of two precast grooved bottom plates.

[0015] Preferably, both the transverse steel bar two and the longitudinal steel bar two adopt HRB400 with a diameter of 12 mm as the stress-bearing steel bars, and the transverse steel bar two is continuous and not disconnected at the joint of two precast grooved bottom plates.

[0016] Preferably, the lapping steel bar one is pre-buried on two adjacent precast grooved bottom plates joined together, and the length buried into the horizontal notch is the anchorage length, and the anchorage length is 21d, where d is the diameter of the lapping steel bar one.

[0017] Preferably, the horizontal notch is at the 1 / 2 position along the front-back direction in the area between adjacent longitudinal steel bars one in the front-back direction. The depth h of the horizontal notch 12 is 40 mm, the width a is 40 mm, and the length n is 190 mm.

[0018] Preferably, vertical steel bars are arranged at intervals in the front-back direction in each precast wall body, and lapping steel bar two is connected between two adjacent vertical steel bars 22 on the left and right of two precast wall bodies;

[0019] The connecting piece two is an inverted U-shaped inserted bar. The lower part of the inverted U-shaped inserted bar is arranged in the double-skin wall. The upper part of the inverted U-shaped inserted bar extends between the splicing sides of two precast grooved bottom plates, and the upper ends of the inverted U-shaped inserted bars are located between the transverse steel bars two; along the front-back direction, the inverted U-shaped inserted bar is located between adjacent lapping steel bar two.

[0020] Preferably, the diameter of the vertical steel bar is 8 mm, and the front-back distance between adjacent vertical steel bars in a single precast wall body is 150 mm;

[0021] The diameter of the lapping steel bar two is 8 mm, and the front-back distance between adjacent lapping steel bar two along the front-back direction is 100 mm.

[0022] Preferably, the inverted U-shaped inserted bar 3 has a height of 365 mm and a width of 75 mm;

[0023] Along the front-back direction, the inverted U-shaped inserted bar is located at the midpoint between two adjacent overlapping steel bars 23 along the front-back direction.

[0024] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Compared with the prior art, the present utility model has the following beneficial effects:

[0026] 1. The precast grooved bottom plate with a horizontal notch (strip-shaped notch) is provided, eliminating the extended steel bars of the laminated slab in the cast-in-place area of the node. Instead, a strip-shaped notch is opened at the end of the precast grooved bottom plate and overlapping steel bar 1 is set. The structure is simple, the construction is easy, the connection is reliable, which is convenient for module production, transportation, installation and splicing, and can effectively improve the integrity and safety of the modular building, shorten the construction process and improve the construction efficiency.

[0027] 2. The two precast walls on both sides and the cast-in-place layer form a double-skin wall and are connected to the top-grooved laminated slab. The double-skin wall is stressed through the longitudinal steel bars in the precast formwork, reducing the binding of the steel cage. The force transmission and stress mechanism of the structure are clear, and the coordinated stress of the formwork and the cast-in-place layer can be realized.

[0028] 3. Compared with the traditional concrete modular node, the grooved laminated slab-wall node realizes the coordinated stress of the formwork and the cast-in-place layer. The steel consumption in module production is less than that of the traditional node, the wall thickness is reduced, which can greatly reduce the overall self-weight of the building, increase the internal space, reduce material waste and a large amount of on-site work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0030] Figure 1 is the overall front view of the connection node of the present utility model;

[0031] Figure 2 is the top view of the precast grooved bottom plate of the present utility model;

[0032] Figure 3 is the structural diagram of the horizontal notch of the present utility model;

[0033] Figure 4 is the top view of the double-skin wall of the present utility model;

[0034] Figure 5 is the front view of the double-skin wall of the present utility model.

[0035] In the figure: 1. Slotted laminated slab; 11. Prefabricated slotted bottom slab; 12. Horizontal notch; 13. Cast-in-place top slab; 14. Steel bar structure one; 141. Longitudinal steel bar one; 142. Transverse steel bar one; 15. Steel bar structure two; 151. Transverse steel bar two; 152. Longitudinal steel bar two; 2. Double-skin wall; 21. Prefabricated wall; 22. Vertical steel bar; 23. Lap steel bar two; 3. Inverted U-shaped inserted bar; 4. Lap steel bar one. Detailed implementation manners

[0036] The preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and are not used to limit the present utility model.

[0037] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0038] The present utility model provides the following embodiments

[0039] Embodiment 1. The embodiment of the present utility model provides a connection node between a concrete modular slotted laminated slab and a wall, as Figures 1 - 5 shown, including:

[0040] A slotted laminated slab 1, which includes two prefabricated slotted bottom slabs 11 and a cast-in-place top slab 13. The two prefabricated slotted bottom slabs 11 are spliced at a certain distance along the left-right direction. A plurality of horizontal notches 12 are arranged at intervals in the front and back on one side of the two prefabricated slotted bottom slabs 11 where they are spliced with each other. The horizontal notches 12 of the two prefabricated slotted bottom slabs 11 correspond one by one, and a first connecting member is arranged in the corresponding horizontal notches 12 of the two prefabricated slotted bottom slabs 11;

[0041] A double-skin wall 2, which includes two prefabricated walls 21. The upper ends of the two prefabricated walls 21 are respectively connected to the lower ends of one side of the two prefabricated slotted bottom slabs 11 where the horizontal notches 12 are provided; A second connecting member is provided for the double-skin wall 2,

[0042] The connector II, two precast walls 21, the connector I, and two precast grooved bottom plates 11 are connected by cast-in-place concrete to form an integral unit with a cast-in-place top plate 13.

[0043] Preferably, the connector I is the overlapping steel bar I 4; in particular, the overlapping steel bar I 4 at the notch of the precast grooved bottom plate 11 can shorten the anchorage length by using a steel bar ring or increasing the diameter of the steel bar, thereby reducing the notch length.

[0044] The precast grooved bottom plate 11 is provided with a steel bar structure I 14, and the steel bar structure I 14 includes: a number of transverse steel bars I 142 arranged at intervals in the left-right direction, and a longitudinal steel bar I 141 is arranged below the transverse steel bars I 142; the longitudinal direction is the left-right direction, and the transverse direction is the front-back direction;

[0045] A steel bar structure II 15 is arranged in the cast-in-place top plate 13, and the steel bar structure II 15 includes: a number of transverse steel bars II 151 arranged at intervals in the left-right direction, and a longitudinal steel bar II 152 is arranged above the transverse steel bars II 151;

[0046] The arrangement position of the horizontal notch 12 in the front-back direction of the horizontal plane is staggered from the longitudinal steel bar I 141.

[0047] Preferably, a total of 3 horizontal notches 12 are arranged on one side of the precast grooved bottom plate 11, and the front-back direction spacing between adjacent front-back horizontal notches 12 is 150 mm;

[0048] Both the transverse steel bar I 142 and the longitudinal steel bar I 141 adopt HRB400 with a diameter of 8 mm as the stress-bearing steel bars. The front-back direction spacing between adjacent longitudinal steel bars I 141 in a single precast grooved bottom plate 11 is 150 mm. The left-right direction spacing between adjacent transverse steel bars I 142 at non-horizontal notches 12 in a single precast grooved bottom plate 11 is 150 mm. The left-right direction spacing between adjacent transverse steel bars I 142 at the horizontal notch 12 in a single precast grooved bottom plate 11 is shortened to 112 mm, and the longitudinal steel bar I 141 is disconnected at the joint of two precast grooved bottom plates 11.

[0049] Preferably, both the transverse steel bar II 151 and the longitudinal steel bar II 152 adopt HRB400 with a diameter of 12 mm as the stress-bearing steel bars, and the transverse steel bar II 151 is continuous and not disconnected at the joint of two precast grooved bottom plates 11.

[0050] Preferably, the overlapping steel bar I 4 is pre-buried on two adjacent precast grooved bottom plates 11 to be spliced, and the length buried in the horizontal notch 12 is the anchorage length, and the anchorage length is 21d, where d is the diameter of the overlapping steel bar I 4.

[0051] Preferably, the horizontal notch 12 is located at the midpoint in the front-back direction within the area between adjacent longitudinal steel bars 141 in the front-back direction. The depth h of the horizontal notch 12 is 40 mm, the width a is 40 mm, and the length n is 190 mm. The dimensions can be adjusted according to the actual situation.

[0052] Preferably, vertical steel bars 22 are arranged at intervals in the front-back direction within each precast wall 21, and lap steel bars 23 are connected between two vertical steel bars 22 of two adjacent precast walls 21 on the left and right.

[0053] The connector 2 is an inverted U-shaped inserted bar 3. The lower part of the inverted U-shaped inserted bar 3 is arranged within the double-skin wall 2, and the upper part of the inverted U-shaped inserted bar 3 extends between the splicing sides of two precast grooved bottom plates 11. Moreover, the upper ends of the inverted U-shaped inserted bars 3 are located between the transverse steel bars 151. Along the front-back direction, the inverted U-shaped inserted bar 3 is located between adjacent lap steel bars 23.

[0054] Preferably, the diameter of the vertical steel bar 22 is 8 mm, and the distance between adjacent vertical steel bars 22 in the front-back direction within a single precast wall 21 is 150 mm; the diameter of the lap steel bar 23 is 8 mm, and the distance between adjacent lap steel bars 23 along the front-back direction is 100 mm, ensuring the lateral stability of the precast wall.

[0055] Preferably, the height of the inverted U-shaped inserted bar 3 is 365 mm and the width is 75 mm; along the front-back direction, the inverted U-shaped inserted bar 3 is located at the midpoint in the front-back direction between adjacent lap steel bars 23, ensuring that the joint area is not easily cracked.

[0056] When the two precast grooved bottom plates 11 on the left and right are hoisted, the horizontal notches 12 (strip notches) correspond to each other one by one. The precast walls 21 are installed correspondingly on both sides below, and after installation and positioning, the cast-in-place layer is poured with the formwork as the formwork, so that the precast walls 21 on both sides and the cast-in-place layer concrete in the middle form a double-skin wall.

[0057] The construction method of the present utility model includes:

[0058] 1. The construction process of this wall is as follows:

[0059] Step S1: Fabricate the double-skin wall 2 at the lower part of the joint; the specific fabrication process is as follows: First, bind the vertical steel bars 22 of the precast wall 21 and the lap steel bars 23 between the two precast walls 21, embed the inverted U-shaped inserted bar 3, then pour one of the precast walls 21, and after it hardens, pour the other precast wall 21 to fabricate the double-skin wall 2.

[0060] Step S2: Fabricate two precast grooved bottom plates 11; the specific fabrication process is to bind the steel bars of the two precast grooved bottom plates 11 respectively and then pour concrete to fabricate the precast grooved bottom plates 11.

[0061] Step S3: Assemble the precast node part on the mold table, that is, the lower double-skin wall 2 and the two precast slotted bottom plates 11, and place the first overlapping steel bar 4 in the horizontal notch 12.

[0062] Step S4: After the installation in Step S3 is completed, pour the cast-in-place part of the concrete.

[0063] The beneficial effects of the above technical solution are as follows:

[0064] 1. The precast slotted bottom plate 11 with a horizontal notch 12 (strip-shaped notch) is set, and the extended steel bars of the laminated slab in the cast-in-place area of the node are cancelled. Instead, a strip-shaped notch is opened at the end of the precast slotted bottom plate 11 and the first overlapping steel bar 4 is set. The structure is simple, the construction is easy, the connection is reliable, which is convenient for module production, transportation, installation and splicing, and can effectively improve the integrity and safety of the modular building, shorten the construction process and improve the construction efficiency.

[0065] 2. The two precast walls 21 and the cast-in-place layer form a double-skin wall 2 connected to the top-slotted laminated slab. The double-skin wall 2 is stressed through the longitudinal steel bars in the precast formwork, reducing the binding of the steel cage. The force transmission and stress mechanism of the structure are clear, and the coordinated stress of the formwork and the cast-in-place layer can be realized.

[0066] 3. Compared with the traditional concrete modular node, the slotted laminated slab-wall node realizes the coordinated stress of the formwork and the cast-in-place layer. The steel consumption during module production is less than that of the traditional node, the wall thickness is reduced, which can greatly reduce the overall self-weight of the building, increase the internal space, reduce the waste of materials and a large amount of on-site operations.

[0067] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. The connection node between the concrete modular grooved laminated slab and the wall is characterized in that: Comprising: A grooved laminated slab (1), the grooved laminated slab (1) includes two precast grooved bottom slabs (11) and one cast-in-place top slab (13). The two precast grooved bottom slabs (11) are spliced at a certain distance along the left-right direction. A number of horizontal notches (12) are arranged at intervals in the front-back direction on one side of the two precast grooved bottom slabs (11) where they are spliced with each other. The horizontal notches (12) of the two precast grooved bottom slabs (11) correspond one by one, and a first connecting member is arranged in the corresponding horizontal notches (12) of the two precast grooved bottom slabs (11); A double-skin wall (2), the double-skin wall (2) includes two precast walls (21), and the upper ends of the two precast walls (21) are respectively connected to the lower ends of one side of the two precast grooved bottom slabs (11) where the horizontal notches (12) are provided; The double-skin wall (2) is provided with a second connecting member, The second connecting member, the two precast walls (21), the first connecting member, and the two precast grooved bottom slabs (11) are connected by cast-in-place concrete to form an integral body with a cast-in-place top slab (13).

2. The connection node of the concrete modular grooved laminated slab and the wall according to claim 1, characterized in that: The first connecting member is a first lapped steel bar (4); The precast grooved bottom slab (11) is provided with a first steel bar structure (14), and the first steel bar structure (14) includes: a number of transverse steel bars one (142) arranged at intervals in the left-right direction, and a longitudinal steel bar one (141) is arranged below the transverse steel bars one (142); The longitudinal direction is the left-right direction, and the transverse direction is the front-back direction; A second steel bar structure (15) is arranged in the cast-in-place top slab (13), and the second steel bar structure (15) includes: a number of transverse steel bars two (151) arranged at intervals in the left-right direction, and a longitudinal steel bar two (152) is arranged above the transverse steel bars two (151); The arrangement position of the horizontal notch (12) in the front-back direction of the horizontal plane is staggered from the longitudinal steel bar one (141).

3. The connection node of the concrete modular grooved laminated slab and the wall according to claim 2, characterized in that: A total of 3 horizontal notches (12) are arranged on one side of the precast grooved bottom slab (11), and the front-back direction spacing between the adjacent front-back horizontal notches (12) is 150 mm; Both the transverse steel bar one (142) and the longitudinal steel bar one (141) use HRB400 with a diameter of 8 mm as the stress-bearing steel bars. The front-back direction spacing between the adjacent front-back longitudinal steel bars one (141) in a single precast grooved bottom slab (11) is 150 mm. The left-right direction spacing between the adjacent left-right transverse steel bars one (142) at the non-horizontal notch (12) in a single precast grooved bottom slab (11) is 150 mm. The left-right direction spacing between the adjacent left-right transverse steel bars one (142) at the horizontal notch (12) in a single precast grooved bottom slab (11) is shortened to 112 mm, and the longitudinal steel bar one (141) is disconnected at the splicing position of the two precast grooved bottom slabs (11).

4. The connection node between the concrete modular slotted composite slab and the wall according to claim 2, characterized in that: Both the transverse steel bar two (151) and the longitudinal steel bar two (152) use HRB400 with a diameter of 12 mm as the stress-bearing steel bars, and the transverse steel bar two (151) is continuous and not disconnected at the splicing position of the two precast grooved bottom slabs (11).

5. The connection node between the concrete modular grooved laminated slab and the wall according to claim 2, characterized in that: The lapping steel bar 1 (4) is pre-buried on two adjacent precast grooved bottom plates (11) to be spliced, and the length buried in the horizontal notch (12) is the anchorage length, and the anchorage length is 21d, where d is the diameter of the lapping steel bar 1 (4).

6. The connection node between the concrete modular grooved laminated slab and the wall according to claim 2, characterized in that: The horizontal notch (12) is at the midpoint in the front-back direction in the area between the longitudinally adjacent longitudinal steel bars 1 (141). The depth h of the horizontal notch (12) is 40 mm, the width a is 40 mm, and the length n is 190 mm.

7. The connection node between the concrete modular grooved composite slab and the wall according to claim 1, characterized in that: Vertical steel bars (22) are arranged at intervals in the front-back direction in each precast wall body (21), and a lapping steel bar 2 (23) is connected between two vertically adjacent vertical steel bars (22) of two adjacent precast wall bodies (21) on the left and right; The connecting member 2 is an inverted U-shaped inserted bar (3). The lower part of the inverted U-shaped inserted bar (3) is arranged in the double-skin wall (2). The upper part of the inverted U-shaped inserted bar (3) extends between the splicing sides of two precast grooved bottom plates (11), and the upper ends of the inverted U-shaped inserted bar (3) are located between the transverse steel bars 2 (151); in the front-back direction, the inverted U-shaped inserted bar (3) is located between adjacent lapping steel bars 2 (23).

8. The connection node between the concrete modular grooved composite slab and the wall according to claim 7, characterized in that: The diameter of the vertical steel bar (22) is 8 mm, and the distance between adjacent vertical steel bars (22) in the front-back direction in a single precast wall body (21) is 150 mm; The diameter of the lapping steel bar 2 (23) is 8 mm, and the distance between adjacent lapping steel bars 2 (23) in the front-back direction is 100 mm.

9. The connection node between the concrete modular grooved composite slab and the wall according to claim 7, characterized in that: The inverted U-shaped inserted bar (3) is 365 mm high and 75 mm wide; In the front-back direction, the inverted U-shaped inserted bar (3) is at the midpoint in the front-back direction between adjacent lapping steel bars 2 (23).

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