WO2020253811A1

WO2020253811A1 - Local composite slab connection node, and construction method therefor

Info

Publication number: WO2020253811A1
Application number: PCT/CN2020/097022
Authority: WO
Inventors: 娄峰; 陈忠; 覃祚威; 柳跃强
Original assignee: 浙江大东吴建筑科技有限公司
Priority date: 2019-06-20
Filing date: 2020-06-19
Publication date: 2020-12-24
Also published as: CN110344530B; CN110344530A

Abstract

Provided is a local composite slab connection node, comprising two prefabricated slabs, wherein an end portion of each prefabricated slab is provided with a groove, the groove is internally provided with a bottom groove, and the bottom grooves in the two prefabricated slabs are arranged opposite each other and constitute a through groove; and a first reinforcing rib is arranged in the bottom groove, a second reinforcing rib is arranged in the groove, a third reinforcing rib perpendicular to the second reinforcing rib is arranged on an upper side of the second reinforcing rib, a top steel bar is arranged on the prefabricated slab, the top steel bar extends from a side wall of the groove to an upper end of the groove opposite the prefabricated plate, and a fourth reinforcing rib is arranged on an upper side of the top steel bar. The present invention can meet the force transmission requirements of a two-way slab, and the rigidity and bearing capacity at a junction are large.

Description

Connecting node of local laminated board and construction method thereof

Technical field

The invention relates to the field of construction technology, and in particular to a connection node of a partially laminated board and a construction method thereof.

Background technique

Concrete laminated slab is a kind of floor structure that combines precast concrete slab and cast-in-place layer. It has the advantages of fast construction and saving formwork. The side splicing of one-way laminated slabs should adopt dense splicing seams with additional steel bars, while the side splicing of two-way slabs should adopt post-cast belt joints. Most of the floor slabs of residential buildings are two-way load-bearing slabs, and the traditional laminated board structure cannot realize the two-way load-bearing function of the laminated board. If the two-way force superimposed slab is designed as a one-way slab, but due to the rigidity of the post-cast layer, the floor slab still transmits the force according to the two-way slab first; after the joint position is cracked, the force is changed to the one-way slab. Such a design not only increases the amount of steel used, but also tends to crack the floor during use, which affects users' use. If the two-way force-bearing laminated slab is joined by a post-cast belt type joint, a supporting form shall be used for construction, and temporary leveling measures shall be adopted under the laminated slab for top bracing and beams; resulting in slow construction speed and increased construction costs.

Summary of the invention

technical problem

The solution to the problem

Technical solutions

The invention provides a connection node of a partially laminated board and a construction method thereof, which can meet the force transmission requirements of the two-way board, and the rigidity and bearing capacity of the connection are large.

In order to achieve the objective, the present invention adopts the following technical solutions:

A connection node of a partially laminated board, comprising two prefabricated boards, the ends of the prefabricated boards are provided with grooves, the grooves are provided with bottom grooves, and the bottom grooves on the two prefabricated boards are arranged opposite to each other. Form a through groove, the bottom groove is provided with a first reinforcement, the groove is provided with a second reinforcement, and the upper side of the second reinforcement is provided with a third reinforcement perpendicular to the second reinforcement The prefabricated slab is provided with top rebars, the top rebars extend from the side wall of the groove to the upper end of the groove opposite to the prefabricated slab, and the upper side of the top rebars is provided with a fourth reinforcement.

As a preference, the end of the top steel bar is bent downward.

As a preference, the first reinforcement is a U-shaped steel bar.

As a preference, the groove is flush with the end of the bottom groove.

As a preference, the bottom groove is a rectangular groove uniformly distributed along the edge of the prefabricated board.

As a preference, the length of the groove and the bottom groove is 300 mm, and the width of the joint between adjacent prefabricated boards is 10 mm.

As a preference, the depth of the groove is greater than 60 mm, and the depth of the bottom groove is greater than 100 mm.

A construction method for connecting nodes of local laminated slabs includes the following steps:

(1) Factory prefabricated prefabricated slabs, the edges of the prefabricated slabs are provided with stepped grooves, the grooves are provided with bottom grooves, the prefabricated slabs are provided with top steel bars and bottom steel bars, and the top steel bars partially extend into the Groove

(2) The prefabricated board is hoisted on site, and the grooves of the adjacent prefabricated boards are aligned and communicated;

(3) Place the first reinforcement in the bottom groove, and set the second reinforcement in the groove, the first reinforcement and the second reinforcement are parallel and perpendicular to the seams of the adjacent prefabricated panels The first reinforcement and the second reinforcement are alternately arranged along the seam, and a third reinforcement perpendicular to the second reinforcement is tied on the upper side of the second reinforcement. The upper side of the top steel bar is tied to the fourth reinforcing bar perpendicular to the top steel bar;

(4) In-situ concrete is poured in the joints, the grooves and the bottom groove to form a bidirectionally stressed floor structure.

The beneficial effects of the invention

Beneficial effect

Compared with the prior art, the present invention has the advantages of adopting the first reinforcement to realize the internal force transmission between adjacent prefabricated slabs and realize the two-way slab force transmission, which tends to be consistent with the performance of the traditional cast-in-place two-way stressed floor slab; At the same time, the second reinforcement and the third reinforcement are used to improve the stiffness and bearing capacity of the joint structure.

Brief description of the drawings

Description of the drawings

Figure 1 is a top view of the floor structure;

Figure 2 is a schematic view of the cross-sectional structure of 1-1 in Figure 1;

Fig. 3 is a schematic diagram of the cross-sectional structure of Fig. 1 2-2;

Fig. 4 is a schematic diagram of the cross-sectional structure of Fig. 3 3-3;

Fig. 5 is a schematic view of the cross-section 4-4 in Fig. 4.

The labels in the figure are as follows:

1. Prefabricated slab, 11. Groove, 12. Bottom groove, 13. Bottom reinforcement, 14. Top reinforcement, 2. First reinforcement, 3. Second reinforcement, 4. Third reinforcement, 5. Fourth Filling, 6. Patchwork.

Invention embodiment

Embodiments of the invention

The present invention will be further described below in conjunction with the embodiments in the drawings.

As shown in Fig. 1 to Fig. 5, a connection node of a partially laminated plate includes two prefabricated plates 1. The end of the prefabricated plate 1 is provided with a groove 11, and the groove 11 is provided with a bottom groove 12, and two prefabricated plates 1 The upper bottom grooves 12 are arranged oppositely and form a through groove. The bottom groove 12 is provided with a first reinforcing rib 2 and the groove 11 is provided with a second reinforcing rib 3. The upper side of the second reinforcing rib 3 is provided with a second reinforcing rib. 3 Vertical third reinforcement 4, the precast slab 1 is provided with a top reinforcement 14 which extends from the side wall of the groove 11 to the upper end of the recess 11 opposite to the precast slab 1, and the upper side of the top reinforcement 14 is provided with a fourth reinforcement Tendons 5. The end of the top steel bar 14 is bent downward, and its lower end is flush with the third reinforcement 4 in the horizontal direction. The first reinforcement 2 is a U-shaped steel bar, and its upper end is flush with the fourth reinforcement 5 in the horizontal direction. The convex structure formed by the groove 11 and the bottom groove 12 is provided with a bottom steel bar 13, and the first reinforcing steel 2 in the bottom groove 12 is flush with the bottom steel bar 13 in the horizontal direction. The second reinforcement 3 and the third reinforcement 4 can be replaced by finished steel mesh.

The groove 11 is flush with the end of the bottom groove 12. The bottom groove 12 is a rectangular groove evenly distributed along the edge of the prefabricated board 1. The length of the groove 11 and the bottom groove 12 is 300mm, and the width of the joint 6 between adjacent prefabricated boards 1 is 10mm. The depth of the groove 11 is greater than 60 mm, and the depth of the bottom groove 12 is greater than 100 mm.

The present invention provides a construction method for connecting nodes of local laminated plates, which includes the following steps:

(1) Factory prefabricated prefabricated slab 1. Stepped groove 11 is provided on the side of prefabricated slab 1, bottom groove 12 is provided on groove 11, top steel bar 14 and bottom steel bar 13 are installed in prefabricated slab 1, top steel bar 14 is partially extended Into the groove 11;

(2) The prefabricated board 1 is hoisted on site, and the grooves 11 of the adjacent prefabricated boards 1 are aligned and connected;

(3) Place the first reinforcement 2 in the bottom groove 12, and set the second reinforcement 3 in the groove 11. The first reinforcement 2 and the second reinforcement 3 are parallel and perpendicular to the adjacent prefabricated panels 1 The first reinforcement 2 and the second reinforcement 3 are alternately arranged along the seam 6. The third reinforcement 4 perpendicular to the second reinforcement 3 is tied on the upper side of the second reinforcement 3, and the top reinforcement 14 The side lashing is perpendicular to the fourth reinforcement 5 of the top reinforcement 14;

(4) In-situ concrete is poured in the joint 6, the groove 11 and the bottom groove 12 to form a two-way stressed floor structure.

The above description is only an explanation of the present invention, so that those of ordinary skill in the art can fully implement this solution, but it is not a limitation of the present invention. After reading this specification, those skilled in the art can make no creativity in this embodiment as needed. Contribution modifications, these are non-creative modifications, but they are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

A connection node of a partially laminated board, comprising two prefabricated boards (1), the end of the prefabricated board (1) is provided with a groove (11), characterized in that: a bottom groove is provided in the groove (11) (12) The bottom grooves (12) on the two prefabricated plates (1) are arranged oppositely and form a through groove, and the bottom groove (12) is provided with a first reinforcing rib (2), and the concave The groove (11) is provided with a second reinforcement (3), and the upper side of the second reinforcement (3) is provided with a third reinforcement (4) perpendicular to the second reinforcement (3). The prefabricated slab (1) is provided with top reinforcing bars (14), and the top reinforcing steel (14) extends from the side wall of the groove (11) to the upper end of the groove (11) opposite to the prefabricated plate (1) , The upper side of the top steel bar (14) is provided with a fourth reinforcing bar (5).
The connection node of a local superimposed plate according to claim 1, wherein the end of the top steel bar (14) is bent downward.
The connection node of a partially laminated slab according to claim 1, characterized in that the first reinforcement (2) is a U-shaped steel bar.
The connection node of a partially laminated board according to claim 1, wherein the groove (11) is flush with the end of the bottom groove (12).
The connection node of a partially laminated board according to claim 1, wherein the bottom groove (12) is a rectangular groove evenly distributed along the edge of the prefabricated board (1).
The connection node of a partially laminated board according to claim 1, characterized in that: the length of the groove (11) and the bottom groove (12) is 300mm, and the distance between adjacent prefabricated boards (1) The width of the seam (6) is 10mm.
The connection node of a partially laminated board according to claim 1, wherein the depth of the groove (11) is greater than 60 mm, and the depth of the bottom groove (12) is greater than 100 mm.
A construction method for connecting nodes of local laminated plates, which is characterized in that it comprises the following steps:

(1) Factory prefabricated prefabricated board (1), said prefabricated board (1) is provided with a stepped groove (11) on the side, said groove (11) is provided with a bottom groove (12), said prefabricated board ( 1) A top steel bar (14) and a bottom steel bar (13) are arranged inside, and the top steel bar (14) partially extends into the groove (11);

(2) The prefabricated board (1) is hoisted on site, and the grooves (11) adjacent to the prefabricated board (1) are aligned and connected;

(3) Place the first reinforcement (2) in the bottom groove (12), and set the second reinforcement (3) in the groove (11), the first reinforcement (2) and the second reinforcement The ribs (3) are parallel and perpendicular to the joints (6) of the adjacent prefabricated panels (1), and the first reinforcing ribs (2) and the second reinforcing ribs (3) are arranged along the joints (6) Alternate arrangement, tie the third reinforcement (4) perpendicular to the second reinforcement (3) on the upper side of the second reinforcement (3), and tie the upper side of the top reinforcement (14) The fourth reinforcement (5) perpendicular to the top reinforcement (14);

(4) In-situ concrete is poured in the joints (6), the grooves (11) and the bottom grooves (12) to form a two-way stressed floor structure.