CN212153865U - Prefabricated component connected node structure - Google Patents

Abstract

The utility model discloses a prefabricated component connected node structure, include: the prefabricated component comprises a lower prefabricated component, an upper prefabricated component, a left middle prefabricated component and a right middle prefabricated component, wherein the left middle prefabricated component comprises a prefabricated part or a prefabricated part and a cast-in-place part; the cast-in-place part of the left middle prefabricated component and/or the cast-in-place part of the right middle prefabricated component is/are higher than the lower bottom surface of the upper prefabricated component. The utility model provides a prefabricated component connected node structure can fundamentally stop the production of the insufficient phenomenon of the cast-in-place section cloth of concrete for cast-in-place section cloth of concrete is closely knit, and prefabricated component connected node can not produce the disjointing phenomenon, and prefabricated component connected node connects reliably, and the atress performance is good, and assembled building's bulk strength is higher.

Description

Prefabricated component connected node structure

Technical Field

The utility model relates to an assembly type structure technical field, concretely relates to prefabricated component connected node structure.

Background

Compared with the traditional cast-in-place concrete building, the prefabricated part has the advantages of short building period, simple construction and the like, so that the prefabricated part is more and more widely applied; but under the action of larger earthquakes, the damage of the fabricated structure is still serious compared with the cast-in-place structure. The biggest difference between the two methods is that the structures and the methods of the connecting nodes are different, so that the research on the structures and the methods of the connecting nodes of the prefabricated parts is of great significance.

In the prior art, a prefabricated part connected node: the prefabricated shear wall comprises an upper prefabricated shear wall body and a lower prefabricated shear wall body, an upper U-shaped steel bar is reserved at the bottom end of the upper prefabricated shear wall body, a lower U-shaped steel bar is reserved at the upper end of the lower prefabricated shear wall body, the upper U-shaped steel bar and the lower U-shaped steel bar are assembled into a closed ring, a cast-in-place area is formed in the closed ring, the composite floor slab comprises a prefabricated layer and a cast-in-place layer, and the cast-in-place layer of the composite floor slab is communicated with the cast-in-place area formed by the middle closed ring.

The prefabricated member connecting node forms a cast-in-place communicated cast-in-place area through the reserved U-shaped steel bars of the cast-in-place layer and the prefabricated shear wall of the floor slab so as to form an integral connecting structure, and the stress performance is improved to a certain extent. However, in the long-term construction practice, a fatal problem is found to exist: the distribution operation of the cast-in-place area between the upper prefabricated shear wall and the lower prefabricated shear wall is difficult, and the construction quality is difficult to detect, so that the condition of insufficient distribution often occurs in the cast-in-place area, cracks and gaps exist between the connection nodes of the upper prefabricated shear wall and the lower prefabricated shear wall, and the connection of the upper prefabricated shear wall and the lower prefabricated shear wall is disconnected. This problem leads to: 1. stress between walls cannot be transferred, and internal reinforcing steel bars bear excessive pressure, so that the stressed reinforcing steel bars are broken; 2. the cracks communicate the reinforcing steel bars with the outside, causing corrosion of the reinforcing steel bars. The steel bar breakage and the steel bar corrosion have a fatal influence on the safety and the tolerance of the fabricated building. Therefore, the problem of insufficient material distribution is solved from the source, the disjointing phenomenon is avoided, and the finding of a prefabricated part connecting node with higher overall strength is very important.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a connect reliable, the higher prefabricated component connected node structure of bulk strength.

In order to achieve the above object, the utility model provides a prefabricated component connected node structure, include:

a lower prefabricated member; the upper prefabricated component is erected on the top of the lower prefabricated component and is jointed with the lower prefabricated component through a concrete cast-in-place section; the left middle prefabricated component comprises a prefabricated part or a prefabricated part and a cast-in-place part, and the right middle prefabricated component comprises a prefabricated part or a prefabricated part and a cast-in-place part; the transverse end parts of the prefabricated parts of the left and right middle prefabricated parts are respectively close to the lower prefabricated part, so that the transverse end surfaces of the prefabricated parts of the left and right middle prefabricated parts respectively form a left and right lower forming flange of the concrete cast-in-place section;

the pouring top surface of the cast-in-place part of the left middle prefabricated component and/or the cast-in-place part of the right middle prefabricated component is higher than the lower bottom surface of the upper prefabricated component.

The prefabricated component connecting node structure is characterized in that the cast-in-place part of the left middle prefabricated component is at least located at one transverse end of the prefabricated part and close to the cast-in-place concrete section, and/or the cast-in-place part of the right middle prefabricated component is at least located at one transverse end of the prefabricated part and close to the cast-in-place concrete section.

The prefabricated component connecting node structure is characterized in that the pouring top surface of the cast-in-place part of the left middle prefabricated component is positioned at one transverse end part of the prefabricated part and close to the cast-in-place concrete section and/or the pouring top surface of the cast-in-place part of the right middle prefabricated component is positioned at one transverse end of the prefabricated part and close to the cast-in-place concrete section.

The prefabricated part connecting node structure is characterized in that the lower bottom surface of the upper prefabricated part comprises a slope surface which is inclined downwards from one transverse end communicated with the cast-in-place part to the other transverse end.

The prefabricated part connecting node structure is characterized in that the concrete cast-in-place section is divided into a first layer and a second layer, and the second layer covers the first layer.

The prefabricated part connecting node structure is characterized in that the second layer of concrete material of the concrete cast-in-place section has higher strength grade and/or higher fluidity than the first layer of concrete material.

Preferably, the cast-in-place part and the prefabricated part are connected and fixed through anchor bars and/or tie bars and/or truss bars.

The prefabricated part connecting node structure is characterized in that the lower prefabricated part is a lower-layer inner wall, the upper prefabricated part is an upper-layer inner wall, and the left middle prefabricated part and/or the right middle prefabricated part is a composite floor slab; the lower layer inner wall comprises a bearing layer, and the specifications of the upper layer inner wall and the lower layer inner wall are the same;

at least two vertical stress ribs with the end parts exposed out of the end surfaces of the prefabricated parts are embedded in the bearing layer at intervals.

The prefabricated part connecting node structure is also characterized in that at least part of vertical stress bars of the upper layer inner wall are butted with at least part of vertical stress bars of the lower layer inner wall in the concrete cast-in-place section;

or at least part of the vertical stress bars of the upper layer inner wall and at least part of the vertical stress bars of the lower layer inner wall are butted by a grouting sleeve buried in the upper layer inner wall or the lower layer inner wall;

or at least two vertical embedded ribs are arranged at intervals on the cast-in-place concrete section, and two ends of each vertical embedded rib are respectively butted with a stress rib of the upper layer inner wall and a stress rib of the lower layer inner wall.

The prefabricated part connecting node structure is characterized in that a longitudinal rib or a longitudinal rib cage is embedded in the concrete cast-in-place section, and the left middle prefabricated part and/or the right middle prefabricated part are/is provided with a tie rib which transversely extends into the concrete cast-in-place section and is connected with the longitudinal rib or the longitudinal rib cage;

and/or the longitudinal ribs or the longitudinal rib cage frame are fixedly connected with the stress ribs of the upper layer inner wall and/or the stress ribs of the lower layer inner wall.

The prefabricated part connecting node structure is characterized in that the middle prefabricated part is provided with at least two transverse stress ribs with the end parts exposed out of the end surfaces of the prefabricated part;

at least part of transverse stress bars of the left middle prefabricated component and at least part of transverse stress bars of the right middle prefabricated component are butted in the concrete cast-in-place section;

or at least two transverse embedded ribs are arranged at intervals on the cast-in-place concrete section, and two ends of each transverse embedded rib are respectively butted with one transverse stress rib of the left middle prefabricated part and one transverse stress rib of the right middle prefabricated part.

Compared with the prior art, the utility model discloses a shaping is pour with cast-in-place section an organic whole to prefabricated component's cast-in-place portion and/or the cast-in-place portion of prefabricated component in the middle of the left side in the middle of the prefabricated component for each part of prefabricated component connected node forms an overall structure, connects between each part inseparabler, and the wholeness is stronger, forms the firm assembled building structure of high strength. Wherein the casting top surface of the casting part of the left middle prefabricated component and/or the casting part of the right middle prefabricated component is higher than the lower bottom surface of the upper layer prefabricated component, because the concrete material has the characteristic of fluidity, the concrete material flows from a high position to a low position naturally, so that the concrete of a cast-in-place part at the high position flows to a concrete cast-in-place section, the place with insufficient material distribution of the concrete cast-in-place section is automatically filled, the phenomenon of insufficient material distribution of the concrete cast-in-place section is fundamentally avoided, the material distribution of the concrete cast-in-place section is compact, in addition, because the top surface of the cast-in-place concrete is higher than the top of the upper prefabricated component, a gap is not generated between the cast-in-place concrete section and the upper prefabricated component after the concrete is cured, the connection node of the prefabricated component is not disconnected, the connection of the connection node of the prefabricated component is reliable, the stress performance is good, and therefore the overall strength of the connection node of the prefabricated component and the assembly type building is improved.

Drawings

Fig. 1 is a schematic structural diagram of a prefabricated part connecting node structure in a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of another prefabricated part connecting node structure in the first embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a prefabricated part connecting node structure before cast-in-place operation in the second embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a combination of several enlarged schematic views at A in FIG. 3;

FIG. 6 is a combination of several enlarged schematic views at A in FIG. 3;

FIG. 7 is a combination of several enlarged schematic views at A in FIG. 3;

FIG. 8 is a schematic view of the interior structure of the prefabricated component connection node structure shown in FIG. 3 after cast-in-place operation;

fig. 9 is an internal structure diagram of the prefabricated part connecting node structure in the third embodiment before cast-in-place operation;

fig. 10 is an internal structure diagram of the prefabricated part connecting node structure after cast-in-place operation in the third embodiment;

FIG. 11 is a schematic view of the internal structure of the prefabricated part connecting node structure after the first layer is poured in the fourth embodiment;

FIG. 12 is a schematic view of the internal structure of the prefabricated part connecting node structure of the fourth embodiment after the second layer is poured;

FIG. 13 is an enlarged schematic view at B of FIG. 12;

FIG. 14 is another enlarged schematic view at B of FIG. 12;

fig. 15 is a schematic view of an internal structure of the prefabricated part connecting node structure according to the fifth embodiment after cast-in-place operation.

In the drawings:

1. a lower prefabricated member; 11. vertical stress ribs;

2. an upper prefabricated part; 21. a bearing layer; 22. vertical stress ribs; 23. a lower bottom surface; 24. main stress ribs; 25. A column stirrup; an included angle A;

3. a left intermediate prefabricated component; 31. a prefabrication part; 32. a cast-in-place section; 321. pouring the top surface; 33. truss reinforcing steel bars; 331. horizontal reinforcing steel bars; 332. web member reinforcing steel bars; 333. transverse reinforcing steel bars; 3331. an anchoring end; 34. stretching the ribs; 35. a beam main rib; 36. a beam stirrup;

4. a right intermediate prefabricated component; 41. a prefabrication part; 42. a cast-in-place section; 421. pouring the top surface;

5. a concrete cast-in-place section; 51. a first layer; 52. a second layer; 53. longitudinal ribs; 54. vertically embedding ribs; 55. Transversely embedding ribs; 56. a connecting sleeve; 57. grouting a sleeve; 58. pouring the top surface;

6. and (5) template.

Detailed Description

In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

The positional relationship between the horizontal direction, the vertical direction and the vertical direction is represented by coordinate axes in the figure. Prefabricated parts refer to various kinds of parts, including full prefabricated parts and partial prefabricated parts, which are manufactured in a professional factory using a pre-molding method and then transported to a site for use. And part of the prefabricated members consist of prefabricated concrete members and post-cast concrete. The main types of the prefabricated parts comprise any reinforced concrete structure body such as a wall body, a beam, a column, a pile, a floor slab and the like. In addition, for convenience of description, in some positions, the left middle prefabricated component 3 and the right middle prefabricated component 4 are collectively referred to as a middle prefabricated component, the prefabricated part 31 of the left middle prefabricated component 3 and the prefabricated part 41 of the right middle prefabricated component 4 are collectively referred to as prefabricated parts, and the cast-in-place part 32 of the left middle prefabricated component 3 and the cast-in-place part 42 of the right middle prefabricated component 4 are collectively referred to as cast-in-place parts.

< example one >

Referring to fig. 1, fig. 1 shows a prefabricated component connection node structure according to an embodiment of the present invention, which includes a lower prefabricated component 1, an upper prefabricated component 2, a left middle prefabricated component 3, and a right middle prefabricated component 4. Specifically, the upper prefabricated component 2 is erected on the top of the lower prefabricated component 1, and the upper prefabricated component and the lower prefabricated component are connected through a concrete cast-in-place section 5; the left middle prefabricated component 3 comprises a prefabricated part 31 and a cast-in-place part 32, and the right middle prefabricated component 4 comprises a prefabricated part 41 and a cast-in-place part 42. Here, one of left intermediate prefabricated component 3 and right intermediate prefabricated component 4 may include only a prefabricated part (see embodiment three in particular). The transverse end portions of the prefabricated part 31 of the left middle prefabricated part 3 and the prefabricated part 41 of the right middle prefabricated part 4 are respectively close to the lower prefabricated part 1 (in the embodiment, the closing specifically means that a small gap which does not cause material leakage is allowed between the two, ideally, the top of the lower prefabricated part 1 supports the transverse ends of the prefabricated part 31 and the prefabricated part 41), so that the transverse end surfaces of the prefabricated part 31 of the left middle prefabricated part 3 and the prefabricated part 41 of the right middle prefabricated part 4 respectively form a left lower forming stopper and a right lower forming stopper of the concrete cast-in-place section.

The pouring top surface 321 of the cast-in-place part 32 of the left middle prefabricated component 3 and/or the pouring top surface 421 of the cast-in-place part 42 of the right middle prefabricated component 4 are/is higher than the lower bottom surface 23 of the upper prefabricated component 2. In this embodiment, the casting top surface 321 and the casting top surface 421 are both higher than the lower bottom surface 23 of the upper prefabricated component 2, so that the integrity of the prefabricated component connection node structure is stronger and the overall strength is higher. In practice, it is only necessary to ensure that the highest point of one of the casting top surfaces 321 and 421 is higher than the lower bottom surface 23. In a preferred embodiment, the pouring top surface 321 and the pouring top surface 421 are higher than the lower bottom surface 23 of the upper prefabricated part by 5-15 mm. Thus, the utility model discloses an effect and the intensity that requires can furthest save material again.

Unlike this, the prior art is that the casting top surface 321 and the casting top surface 421 are flush with the lower bottom surface 23 of the upper prefabricated part 2 or lower than the lower bottom surface 23 of the upper prefabricated part 2. Compared with the prior art, the utility model discloses the shaping is pour with the cast-in-place section 5 an organic whole in prefabricated component 4 cast-in-place portion 42 of prefabricated component in the middle of the cast-in-place portion 32 of prefabricated component 3 and/or the right side in the middle of the left side for each part of prefabricated component connected node forms an overall structure, connects between each part inseparabler, and the wholeness is stronger, forms the firm assembled building structure of high strength. Wherein, the casting top surface 321 and/or the casting top surface 421 is higher than the lower bottom surface 23 of the upper prefabricated component 2, because the concrete material has the characteristic of fluidity, the concrete material naturally flows from a high position to a low position, so that the concrete of the cast-in-place part 32 and/or the cast-in-place part 42 at the high position flows to the cast-in-place concrete section 5, and the place with insufficient cloth material of the cast-in-place concrete section 5 is automatically filled, thereby fundamentally avoiding the phenomenon of insufficient cloth material of the cast-in-place concrete section 5, leading the cloth material of the cast-in-place concrete section 5 to be compact, in addition, because the casting top surface 321 and/or the casting top surface 421 of the cast-in-place part 32 is higher than the lower bottom surface 23 of the upper prefabricated component 2, no gap is generated between the cast-in-place concrete section 5 and the upper prefabricated component 2 after the concrete is cured, the stress performance is good, so that the integral strength of the prefabricated part connecting node and the assembly type building is improved.

In addition, two points are also to be explained: firstly, the distribution and the size of a cast-in-place part; and secondly, pouring the concept and the position of the top surface. Referring to fig. 2, fig. 2 is another prefabricated component connection node structure disclosed in the first embodiment of the present invention. First, the distribution and size of the cast-in-place part: in order to make the prefabricated member connecting node structure have the technical effects different from those of the prior art, the left middle prefabricated member 3 and the right middle prefabricated member 4 only need to ensure that one of the left middle prefabricated member 3 and the right middle prefabricated member 4 only comprises a prefabricated part, the other one of the left middle prefabricated member 3 and the right middle prefabricated member 4 only comprises a pouring part and a pouring part, but only needs to ensure that the pouring top surface of one of the pouring parts is higher than the lower bottom surface 23, and the other one of the pouring parts of the left middle prefabricated member 3 and the right middle prefabricated member 4 is higher than the lower bottom surface 23 of the upper prefabricated member 2 (see fig. 1 and 2)). Further, the cast-in-place portion may not cover the prefabricated portion at all, and as shown in fig. 2, the cast-in-place portion 32 may cover only a lateral section of the prefabricated portion 31. It is however ensured that the cast-in-place section 32 of the left intermediate prefabricated element 3 is located at least at one lateral end of the prefabricated part 31 and adjacent to the cast-in-place section 5 of concrete and/or that the cast-in-place section 42 of the right intermediate prefabricated element 4 is located at least at one lateral end of the prefabricated part 41 and adjacent to the cast-in-place section 5 of concrete. Secondly, the concept and position of the top surface are poured: the casting top surface refers to a plane where the highest section (or point) of the casting surface of the cast-in-place part is located, and since the casting surface of the cast-in-place part is generally a plane or a step surface with a height difference, the casting top surface generally refers to a casting surface where the whole section of horizontal casting surface or the step surface with the highest height is located. It is to be ensured, however, that the casting top surface 321 of the cast-in-place part 32 of the left middle prefabricated part 3 is located at one lateral end of the prefabricated part 31 and close to the cast-in-place concrete section 5 and/or the casting top surface 421 of the cast-in-place part 42 of the right middle prefabricated part 4 is located at one lateral end of the prefabricated part 41 and close to the cast-in-place concrete section 5. As shown in fig. 2, the upper plane of the cast-in-place portion 42 of the right middle prefabricated component 4 is a step surface with a height difference, and the casting top surface 421 is located at one lateral end of the prefabricated portion 41 and is close to the cast-in-place concrete section 5.

Therefore, on the premise of meeting the basic requirements, the distribution and the size of the cast-in-place part and the position of the pouring top surface can be correspondingly adjusted according to the actual production condition, and the cast-in-place part has two effects: firstly, the actual operation in the construction stage is more flexible; and secondly, the production cost can be saved by reasonably adjusting the distribution and the size of the prefabricated part.

< example two >

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

For the purpose of the present invention, the upper prefabricated component 2 in the present embodiment is an upper inner wall, the lower prefabricated component 1 is a lower inner wall, and the left middle prefabricated component 3 and the right middle prefabricated component 4 are laminated floors as an example. But do not show, the utility model discloses in specific prefabricated component only be limited to this application scene, specific prefabricated component type still can be for arbitrary reinforced concrete structure such as wall body, roof beam, post, stake, floor. The composite floor slab comprises a concrete prefabricated part prefabricated by a mold in a factory and a cast-in-place part cast by using concrete on site, and the prefabricated part can be used as a bearing structure for later construction.

Referring to fig. 3 and 8, the cast-in-place portion 32 and the prefabricated portion 31 of the left middle prefabricated part 3 are connected by truss reinforcements 33. The cast-in-place portion 32 may also be secured by anchor bars and/or tie bars and/or truss reinforcement 33, depending on the actual production requirements. Wherein the truss reinforcement 33 includes horizontal reinforcement 331, web reinforcement 332, and transverse reinforcement 333. Compared with other structures, the composite floor slab with the internal structure of the truss reinforcing steel bars 33 has higher bearing capacity and deformation resistance, is beneficial to uniform arrangement intervals of the transverse reinforcing steel bars 333 and consistent thickness of a concrete protective layer, improves the construction quality of the floor slab, can obviously reduce the quantity of on-site reinforcing steel bar binding engineering, and accelerates the construction progress. In the present embodiment, the right intermediate prefabricated member 4 and the left intermediate prefabricated member 3 have the same specifications.

Referring to fig. 3, the upper inner wall includes a bearing layer 21, and the upper inner wall and the lower inner wall have the same specification. At least two vertical stress bars 22 with the end parts exposed on the end surfaces of the prefabricated parts are embedded in the bearing layer 21 at intervals, at least part of the vertical stress bars 22 of the upper inner wall are butted with at least part of the vertical stress bars 11 of the lower inner wall in the concrete cast-in-place section 5, and therefore the upper inner wall is butted with the lower inner wall.

Referring to fig. 4, the vertical stress bar 22 of the upper inner wall is connected with the vertical stress bar 11 of the lower inner wall through a mechanical connecting sleeve 56; the connection mode is simple to operate and reliable in connection. Of course, the connection mode of the vertical stress bar 22 of the upper inner wall and the vertical stress bar 11 of the lower outer wall is various.

Referring to fig. 5, fig. 5 shows a combination of the vertical stress bar 22 of the upper inner wall and the vertical stress bar 11 of the lower inner wall, and one of the combinations is that the vertical stress bar 22 and the vertical stress bar 11 are connected by welding, overlapping or binding. Secondly, at least two vertical embedded ribs 54 are arranged at intervals on the concrete cast-in-place section 5, and two ends of each vertical embedded rib 54 are respectively butted with the vertical stress rib 22 and the vertical stress rib 11; the vertical embedded rib 54 and the vertical stress rib 22 and the vertical stress rib 11 are butted in a mechanical connecting sleeve connection mode, a welding mode, an overlapping mode, a binding connection mode and the like, and the welding mode is adopted in the embodiment. And thirdly, at least part of the vertical stress bars 22 of the upper layer inner wall and at least part of the vertical stress bars 11 of the lower layer inner wall are connected by grouting sleeves 57 buried in the upper layer inner wall or the lower layer inner wall in an opposite mode, and compared with other connection modes, the connection mode does not need to reserve operation space and can be suitable for actual production conditions without reserved operation space. Compared with welding, mechanical sleeve connection and other modes, the sleeve grouting connection has the advantages that the workload of steel bar preprocessing can be reduced, and the steel bar cannot generate secondary stress and deformation during site construction.

Referring to fig. 6, the manner of the composite floor slab to achieve stable connection with the upper inner wall and the lower inner wall is various, and fig. 6 shows the combination of the composite floor slab with the upper inner wall and the lower inner wall. One method is to embed a longitudinal rib 53 in the concrete cast-in-place section 5, and the longitudinal rib 53 is welded or bound and connected with the vertical stress rib 22 of the upper layer inner wall and/or the vertical stress rib 11 of the lower layer inner wall. The left middle prefabricated part 3 and the right middle prefabricated part 4 are provided with tie bars 34 which transversely extend into the concrete cast-in-place section 5 and are welded, lapped or bound with longitudinal bars 53 so as to realize the stable connection among the composite floor slab, the upper outer wall and the lower outer wall. The longitudinal ribs 53 here can also be longitudinal rib cages. And the second one is that the transverse steel bars 333 in the left middle prefabricated component 3 and the right middle prefabricated component 4 transversely extend into the cast-in-place concrete section 5, and the anchoring ends 3331 are arranged at the end parts to enhance the anchoring force with the cast-in-place concrete section 5 so as to realize the stable connection among the composite floor slab, the upper inner wall and the lower inner wall.

Referring to fig. 4, in order to enhance the strength of the prefabricated member connection node structure, generally, the left middle prefabricated member 3 and the right middle prefabricated member 4 are butted against each other in the concrete cast-in-place section 5. Fig. 4 shows a connection of the left intermediate prefabricated part 3 to the right intermediate prefabricated part 4: the left middle prefabricated part 3 and the right middle prefabricated part 4 are provided with at least two transverse steel bars 333 with the end parts exposed out of the end surfaces of the prefabricated parts, at least two transverse embedded bars 55 are arranged at intervals in the concrete cast-in-place section 5, and two ends of each transverse embedded bar 55 are respectively butted with one transverse steel bar 333 of the left middle prefabricated part 3 and one transverse steel bar 333 of the right middle prefabricated part 4.

Referring to fig. 7, fig. 7 shows a combination of the left middle prefabricated part 3 and the right middle prefabricated part 4 in the concrete cast-in-place section 5. One of the two transverse reinforcing bars is that the transverse reinforcing bar 333 between the left middle prefabricated component 3 and the right middle prefabricated component 4 extends into the concrete cast-in-place section 5, and the two transverse reinforcing bars 333 are connected in a welding mode, an overlapping mode or a binding mode. And the second is that two transverse stress ribs are connected through a mechanical connecting sleeve 56.

In addition, the present embodiment also provides an assembling method for assembling and forming the above prefabricated part connecting node structure, which includes the following steps:

fixing the lower prefabricated part 1: transporting the lower prefabricated part 1 to a preset position and fixing the lower prefabricated part in an upright state;

the mounting step of the intermediate prefabricated part comprises the following steps: laying the prefabricated part 31 of the left middle prefabricated part 3 and the prefabricated part 41 of the right middle prefabricated part 4 on the top of the lower prefabricated part 1; installing a longitudinal rib 53 of the concrete cast-in-place section 5 on the top of the lower prefabricated part 2; connecting at least part of the tie bars 34 of the intermediate prefabricated element to said longitudinal bars 53 (or other connection means mentioned above which enable the connection of the intermediate prefabricated element to the lower prefabricated element 1);

and/or at least part of the transverse steel bars 333 of the left middle prefabricated component 3 are butted with at least part of the transverse steel bars 333 of the right middle prefabricated component 4;

fixing the upper prefabricated part 2: hoisting the upper prefabricated part 2 to the top of the lower prefabricated part 1 and supporting and fixing the upper-layer space; at least part of the vertical stress ribs 22 of the upper prefabricated part 2 are butted with at least part of the vertical stress ribs 11 of the lower prefabricated part 1;

the cast-in-place operation step: and pouring concrete to form the concrete cast-in-place section 5 and the cast-in-place part, and ensuring that the pouring top surface of the cast-in-place part is higher than the lower bottom surface 23 of the upper prefabricated component 2.

A vibrating step: and vibrating the concrete of the concrete cast-in-place section 5 and the cast-in-place part by using a vibrating rod and/or a flat plate vibrator so as to compact the concrete and level the exposed layer.

Shaping: and before the concrete is completely cured, carrying out floating operation on the cast-in-place part.

The concrete pouring mode can also adopt manual work or a material distribution vehicle for material distribution and the like, and the compactness of the concrete material distribution can be further enhanced by adopting a high-pressure pump conveying mode in the embodiment.

< example three >

In the present embodiment, the same portions as those in the first embodiment and the second embodiment are given the same reference numerals, and the same description is omitted.

Referring to fig. 9 and 10, the difference between the present embodiment and the second embodiment is that the left middle prefabricated component 3 only includes the prefabricated part 31. This embodiment is less than cast-in-place work volume with embodiment two, has reduced the operation degree of difficulty of actual construction, and on the other hand, prefabricated component 3 only contains prefabricated part 31 in the middle of the left side and means that it can be prefabricated at the mill completely, and it is owing to need not be at on-the-spot secondary operation, because cast in situ concrete need the certain time solidify, so this embodiment has also reduced the engineering time to a certain extent, makes prefabricated component connected node structure in this embodiment both realized the utility model provides high connected node structural strength's effect has improved the efficiency of construction again.

In addition, the present embodiment also provides an assembling method for assembling and forming the above prefabricated part connecting node structure, which includes the following steps:

fixing the lower prefabricated part 1: transporting the lower prefabricated part 1 to a preset position and fixing the lower prefabricated part in an upright state;

the mounting step of the intermediate prefabricated part comprises the following steps: laying the prefabricated part 31 of the left middle prefabricated part 3 and the prefabricated part 41 of the right middle prefabricated part 4 on the top of the lower prefabricated part 1; installing a longitudinal rib 53 of a concrete cast-in-place section 5 on the top of the lower prefabricated part 1; connecting at least part of the tie bars 34 of the right intermediate prefabricated element 4 to said longitudinal bars 53 (or other connection means mentioned above which enable the connection of the intermediate prefabricated element to the lower prefabricated element 1);

fixing the upper prefabricated part 2: hoisting the upper prefabricated part 2 to the top of the lower prefabricated part 1 and supporting and fixing the upper-layer space; at least part of the vertical stress ribs 11 of the upper prefabricated part 2 are butted with at least part of the vertical stress ribs 22 of the lower prefabricated part 1;

the cast-in-place operation step: the detachable forming template 6 with the top surface higher than the lower bottom surface 23 of the upper prefabricated component 2 is detachably connected with the left middle prefabricated component 3 through a fastener, a material distribution channel with the minimum straight-line distance larger than or equal to 5 mm is formed between the bottom of the upper prefabricated component 2 and the detachable forming template 6, when concrete pouring operation is carried out between the upper prefabricated component 2 and the lower prefabricated component 1 through the material distribution channel, the concrete pouring top surface is ensured to be higher than the bottom surface of the upper prefabricated component 2, and the prefabricated component connecting node structure shown in fig. 10 is formed.

< example four >

In the present embodiment, the same portions as those in the first, second, and third embodiments are given the same reference numerals, and the same description is omitted.

Referring to fig. 11 to 14, the present embodiment discloses a prefabricated member connection node structure, which is different from the second embodiment in that the lower bottom surface 23 of the upper prefabricated member 2 includes a slope surface sloping downward from one lateral end communicating with the cast-in-place portion to the other lateral end. The concrete cast-in-place section 5 is formed by adopting a layered pouring method, so that the structure of the concrete cast-in-place section 5 is divided into a first layer 51 and a second layer 52, the second layer 52 covers the first layer 51, and the concrete material of the second layer 52 has higher strength grade and/or higher fluidity than the concrete material of the first layer 51; the casting surfaces of the cast-in-place part 32 and the cast-in-place part 42 are not horizontal surfaces, and the casting top surface 321 and the casting top surface 421 are positioned at one end of the cast-in-place part close to the transverse direction of the concrete cast-in-place section 5.

Referring to fig. 13 and 14, the slope surface has two manifestations: as shown in fig. 13, a horizontal end of the lower bottom surface 23 communicated with the cast-in-place portion 32, and a horizontal end of the lower bottom surface 23 communicated with the cast-in-place portion 42 form a slope surface inclined downwards towards the other horizontal end, so that the lower bottom surface 23 forms a slope surface inclined downwards towards the middle part from two horizontal ends communicated with the cast-in-place portion; second, as shown in fig. 14, the lower bottom surface 23 includes a slope surface which is communicated with any cast-in-place part and is inclined downwards from one transverse end to another transverse section.

In this embodiment, since the lower bottom surface 23 of the upper prefabricated member 2 is formed with a slope surface inclining downwards from one horizontal end communicated with the cast-in-place part to the other horizontal end, after the concrete is cast, the cast-in-place top surface of the prefabricated part, the horizontal end of the cast-in-place part communicated with the prefabricated part, the other horizontal end of the cast-in-place part far away from the prefabricated part or the middle part of the cast-in-place concrete section 5 sequentially form a height gradient difference with gradually reduced height. And because the concrete has the characteristics of fluidity, the concrete material can naturally flow to the cast-in-place concrete section 5 from the casting top surface of the prefabricated part, and the concrete material in the cast-in-place concrete section 5 can be gradually filled to the lower end of the height along the gradient of the lower bottom surface 23, so that the whole cast-in-place concrete section 5 is tightly distributed. Compared with the second expression form, the first expression form of the slope surface can enable the concrete distribution of the concrete cast-in-place section 5 to be more uniform and compact, the structure of the upper prefabricated part 2 can be more symmetrical, and the overall strength of the prefabricated part connecting structure is stronger; and compared with the first prefabricated component, the second prefabricated component 2 is simpler to manufacture. Compared with the embodiment, the design further ensures the concrete compactness of the middle part of the concrete cast-in-place section 5 or one transverse end positioned at the low point of the slope surface due to the limited fluidity of the concrete material. In consideration of the strength of the connection node of the prefabricated part, the included angle A between the slope surface and the horizontal plane is less than 3 degrees.

Referring to fig. 12, the casting surfaces of the cast-in-place portion 32 and the cast-in-place portion 42 are not horizontal surfaces, and the casting top surfaces 321 and 421 are located at one ends of the cast-in-place portion 32 and the cast-in-place portion 42 close to the lateral direction of the concrete cast-in-place section 5, and are used for ensuring the amount of concrete flowing to the concrete cast-in-place section 5; the heights of the transverse ends of the cast-in-place part 32 and the cast-in-place part 42 far away from the concrete cast-in-place section 5 are not limited, and the height of the casting surface can be flush with the lower bottom surface 23 or lower than the lower bottom surface 23, and the cast-in-place part can be reasonably arranged according to the consideration of actual production and concrete cost.

The embodiment also provides an assembling method for assembling and forming the prefabricated part connecting node structure, which comprises the following steps:

fixing the lower prefabricated part 1: transporting the lower prefabricated part 1 to a preset position and fixing the lower prefabricated part in an upright state;

the mounting step of the intermediate prefabricated part comprises the following steps: laying the prefabricated part 31 of the left middle prefabricated part 3 and the prefabricated part 41 of the right middle prefabricated part 4 on the top of the lower prefabricated part 1;

fixing the upper prefabricated part 2: hoisting the upper prefabricated part 2 to the top of the lower prefabricated part 1 and supporting and fixing the upper-layer space;

the cast-in-place operation step: firstly, pouring concrete materials to form a first layer 51 of the concrete cast-in-place section 5 by adopting a layered pouring method; using a vibrating rod and/or a flat plate vibrator to cast the concrete in situ section 5 so as to compact the concrete and level the exposed layer; after the first layer 51 of concrete material of the cast-in-place section 5 of concrete is primarily solidified, a pouring mode of high-pressure pump delivery is adopted, and concrete material with higher strength and larger fluidity than the first layer 51 of concrete material is poured to form the second layer 52 of the cast-in-place section 5 of concrete, the prefabricated part 31 and the prefabricated part 41.

A vibrating step: and vibrating the concrete of the concrete cast-in-place section 5, the cast-in-place part 32 and the cast-in-place part 42 by using a vibrating rod and/or a flat plate vibrator so as to compact the concrete and level the exposed layer.

Shaping: the cast-in-place portion 32 and the cast-in-place portion 42 are smoothed before the concrete is completely cured.

Referring to fig. 11 to 14, in the present embodiment, the cast-in-place concrete section 5 is formed by a layered casting method, such that the cast-in-place concrete section 5 is divided into a first layer 51 and a second layer 52, the second layer 52 covers the first layer 51, the first layer 51 and the second layer 52 are vibrated separately, generally, the thickness of the first layer 51 is greater than that of the second layer 52, and the casting liquid level of the first layer 51 is between the top surfaces of the two prefabricated parts and the lower bottom surface 23 of the upper prefabricated component 2. The layered pouring and layered vibrating mode avoids the phenomenon that the lower concrete material is not sufficiently vibrated under the condition that the concrete cast-in-place section 5 is thick, and a gap exists between the concrete materials to generate hollowing. Furthermore, because the concrete material can have a shrinkage phenomenon in the curing and cooling processes, the layered pouring mode enables the concrete poured by the second layer 52 to be naturally filled into the shrinkage space of the concrete material of the first layer 51, and the overall compactness of the concrete cast-in-place section 5 is ensured. Further, the second layer 52 of concrete material may be of a higher strength grade and/or greater fluidity than the first layer 51 of concrete material in order to facilitate flow and avoid cracking in the laminated area.

< example five >

In the present embodiment, the same portions as those in the first, second, and third embodiments as those in the fourth embodiment are given the same reference numerals, and the same description is omitted.

Referring to fig. 15, the present embodiment discloses a prefabricated component connection node structure, where an upper prefabricated component 2 adopts an upper column structure, a lower prefabricated component 1 adopts a lower column structure, and a middle prefabricated component adopts a beam structure. The left beam comprises a prefabricated part 31 and a cast-in-place part 32 formed on the prefabricated part 31 at the back, and one transverse end face of the prefabricated part 31 forms a left forming rib of the concrete cast-in-place section 5; the right beam comprises a prefabricated part 41 and a cast-in-place part 42 formed on the prefabricated part 41 at the back, one transverse end face of the prefabricated part 41 forms a right forming rib of the concrete cast-in-place section 5, wherein the cast-in-place part 32, the cast-in-place part 42 and the concrete cast-in-place section 5 are connected into a whole, and the casting top surface 321 of the cast-in-place part 32 and the casting top surface 421 of the cast-in-place part 42 are higher than the lower bottom surface 23 of the upper column.

The upper column is the same as the lower column in specification, at least two main stress bars 24 which are vertically arranged at intervals are embedded in the column, column hoops 25 which are used for winding and reinforcing the main stress bars 24 are embedded in the column, and the main stress bars 24 of the upper column and the main stress bars 24 of the lower column are connected through grouting sleeves 57 which are embedded in the upper column. The beam internal structure comprises a beam main reinforcement 35 and a beam stirrup 36, wherein the beam main reinforcement 35 transversely extends to the concrete cast-in-place section 5 and is provided with an anchoring end for strengthening the anchoring force of the beam.

The main atress muscle 24 of post and the main atress muscle 24 of lower post adopt grout sleeve 57 to be connected on this embodiment, and the concrete connection step is: insert grout sleeve 57 one end with the main atress muscle 24 of upper prop to in the same pre-buried income upper prop of the main atress muscle 24 of upper prop, the grout sleeve 57 is kept away from the other end terminal surface of the main atress muscle 24 of upper prop and is flushed with bottom surface 23 under the upper prop, when carrying out the assembly of upper prop and lower prop, insert grout sleeve 57 with lower prop main atress muscle 24 in, through pouring into the concrete in grout sleeve 57 with connecting two main atress muscle 24.

Common steel bar connection modes in a cast-in-place concrete structure comprise binding lap joint, welding connection, mechanical connection and the like, and because the connection part of the prefabricated concrete structure is small, the traditional steel bar connection modes are inconvenient to construct. Compared with welding, mechanical sleeve connection and other modes, the sleeve grouting connection has the advantages that the workload of steel bar preprocessing can be reduced, and the steel bar cannot generate secondary stress and deformation during site construction.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and decorations made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims (11)

1. A prefabricated member connection node structure, comprising:

a lower prefabricated member;

the upper prefabricated component is erected on the top of the lower prefabricated component and is connected with the lower prefabricated component through a concrete cast-in-place section;

the left middle prefabricated component comprises a prefabricated part or a prefabricated part and a cast-in-place part, and the right middle prefabricated component comprises a prefabricated part or a prefabricated part and a cast-in-place part; the transverse end parts of the prefabricated parts of the left and right middle prefabricated parts are respectively close to the lower prefabricated part, so that the transverse end surfaces of the prefabricated parts of the left and right middle prefabricated parts respectively form a left and right lower forming flange of the concrete cast-in-place section;

the pouring top surface of the cast-in-place part of the left middle prefabricated component and/or the cast-in-place part of the right middle prefabricated component is higher than the lower bottom surface of the upper prefabricated component.

2. The precast element connecting node structure according to claim 1, wherein the cast-in-place portion of the left middle precast element is located at least at one lateral end of the precast portion and near the cast-in-place concrete section and/or the cast-in-place portion of the right middle precast element is located at least at one lateral end of the precast portion and near the cast-in-place concrete section.

3. The prefabricated component connection node structure of claim 1, wherein the cast-in-place portion of the left middle prefabricated component has a cast-in-place top surface at one lateral end of the prefabricated component and adjacent to the cast-in-place concrete section and/or the cast-in-place portion of the right middle prefabricated component has a cast-in-place top surface at one lateral end of the prefabricated component and adjacent to the cast-in-place concrete section.

4. The prefabricated unit connecting node structure of claim 1, wherein the lower bottom surface of the upper prefabricated unit includes a slope surface which is downwardly inclined from one lateral end communicating with the cast-in-place portion to the other lateral end.

5. The prefabricated member connection node structure of claim 1, wherein the cast-in-place concrete section is divided into a first layer and a second layer, and the second layer covers the first layer.

6. The precast element connecting node structure according to claim 5, wherein the second layer concrete material of the concrete cast-in-place section has a higher strength grade and/or a higher fluidity than the first layer concrete material.

7. The prefabricated part connecting node structure according to claim 1, wherein the lower prefabricated part is a lower inner wall, the upper prefabricated part is an upper inner wall, and the left middle prefabricated part and the right middle prefabricated part are laminated floors; the lower layer inner wall comprises a bearing layer, and the specifications of the upper layer inner wall and the lower layer inner wall are the same;

at least two vertical stress ribs with the end parts exposed out of the end surfaces of the prefabricated parts are embedded in the bearing layer at intervals.

8. The prefabricated component connecting node structure of claim 7, wherein at least part of the vertical stress bars of the upper inner wall are butted against at least part of the vertical stress bars of the lower inner wall in the concrete cast-in-place section;

or at least part of the vertical stress bars of the upper layer inner wall and at least part of the vertical stress bars of the lower layer inner wall are butted by a grouting sleeve buried in the upper layer inner wall or the lower layer inner wall;

or at least two vertical embedded ribs are arranged at intervals on the cast-in-place concrete section, and two ends of each vertical embedded rib are respectively butted with a stress rib of the upper layer inner wall and a stress rib of the lower layer inner wall.

9. The prefabricated component connecting node structure of claim 7, wherein a longitudinal rib or a longitudinal rib cage is embedded in the concrete cast-in-place section, and the left middle prefabricated component and/or the right middle prefabricated component are/is provided with a tie rib which transversely extends into the concrete cast-in-place section and is connected with the longitudinal rib or the longitudinal rib cage;

and/or the longitudinal ribs or the longitudinal rib cage frame are fixedly connected with the stress ribs of the upper layer inner wall and/or the stress ribs of the lower layer inner wall.

10. The prefabricated component connecting node structure of claim 7, wherein the middle prefabricated component is provided with at least two transverse stress ribs with end portions exposed out of the end surfaces of the prefabricated component;

at least part of transverse stress bars of the left middle prefabricated component and at least part of transverse stress bars of the right middle prefabricated component are butted in the concrete cast-in-place section;

or at least two transverse embedded ribs are arranged at intervals on the cast-in-place concrete section, and two ends of each transverse embedded rib are respectively butted with one transverse stress rib of the left middle prefabricated part and one transverse stress rib of the right middle prefabricated part.

11. The prefabricated member connection node structure of claim 2, wherein the cast-in-place part and the prefabricated part are connected and fixed by anchor bars and/or tie bars and/or truss bars.

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