CN108385857A - A kind of precast prestressed connecting structure of wall of abnormity and assembly method - Google Patents

Abstract

The invention discloses a special-shaped prefabricated prestressed wall connection structure and an assembly method. The connection structure includes a shear wall panel and a prestressed wall, and the prestressed wall includes a base body and connections distributed around the base body. body, the connecting body is provided with a longitudinal groove, and the longitudinal groove passes through the top surface, the bottom surface of the connecting body and the side away from the base body; one side of the shear wall panel is connected to the longitudinal The grooves are connected so that the longitudinal grooves form a longitudinal well; the prestressed steel bars penetrating the top and bottom surfaces of the substrate are distributed in the base, and the longitudinal grooves are pre-embedded with The transverse shear reinforcement of the groove, the embedded reinforcement is arranged between the shear wall panel and the prestressed wall, one end of the embedded reinforcement is located in the matrix, and the other end passes through the longitudinal groove And extend into the said shear wall panel. The invention simplifies the construction process and reduces the construction cost on the premise of ensuring the quality.

Description

A special-shaped prefabricated prestressed wall connection structure and assembly method

technical field

The invention relates to the technical field of prefabricated assembled concrete structures and construction, in particular to a special-shaped prefabricated prestressed wall connection structure and an assembly method.

Background technique

my country's traditional residential construction method basically adopts the cast-in-place method, because this method is relatively mature in technology, but there are still many problems in the cast-in-place structural system. First, the construction conditions on site are poor; The waste is serious; the third is limited by the site and weather conditions, the construction efficiency is low and the construction time is long; the fourth is that the on-site construction has a great impact on the surrounding environment. In contrast, the prefabricated shear wall is constructed in an industrialized way. Some or all of the components of the house are prefabricated in the factory, and then transported to the construction site. The components are assembled into one body through reliable connections, and the construction period is short. , stable and reliable quality, environmental protection and energy saving, etc., can greatly relieve market pressure.

However, most of the existing prefabricated shear wall structure connection methods are vertical connection, and there are few horizontal connection methods, and the horizontal connection mostly adopts the method of cast-in-place concrete, which requires a large amount of wet work on site, and requires formwork, and the cost is high. The construction of the wall panel connection is complicated, and the construction quality is not easy to control, and the overall mechanical properties of the assembled shear wall structure are not good.

Contents of the invention

The purpose of the present invention is to provide a special-shaped prefabricated prestressed wall connection structure and assembly method to solve the problems existing in the current single prefabricated shear wall horizontal connection method, reduce on-site wet work, simplify the construction process, reduce costs and Quality assurance.

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

A special-shaped prefabricated prestressed wall connection structure, including a shear wall panel and a prestressed wall, the prestressed wall includes a base body and connecting bodies distributed around the base body, and the connecting body is provided with a longitudinal concave Groove, the longitudinal groove passes through the top surface, the bottom surface of the connecting body and the side away from the base body; one side of the shear wall panel is connected with the longitudinal groove, so that the longitudinal groove forms Longitudinal groove well; the prestressed steel bars penetrating the top surface and the bottom surface of the base body are distributed in the base body, and the transverse shear steel bars crossing the longitudinal groove are pre-embedded in the described longitudinal groove. A pre-embedded steel bar is arranged between the force wall panel and the prestressed wall, one end of the pre-embedded steel bar is located in the matrix, and the other end passes through the longitudinal groove and extends into the shear wall panel .

Further, the connectors on both sides of the longitudinal groove are symmetrically provided with card slots along the length direction of the longitudinal groove, and a pair of card edges matching the card slots are provided on the side of the shear wall panel. .

Further, longitudinal full-length steel bars parallel to the prestressed steel bars are distributed inside the longitudinal groove, and the longitudinal full-length steel bars are bound and connected to the transverse shear steel bars.

Further, grouting sleeves leading to the interior of the shear wall panels are distributed on the side of the shear wall panels, and the ends of the pre-embedded steel bars extend into the grouting sleeves.

Further, four connectors are arranged at intervals around the base, so that the prestressed wall as a whole has a "cross" shape structure.

Further, the height and thickness of the shear wall panel and the connecting body are the same.

Further, the pre-embedded reinforcement is perpendicular to the prestressed reinforcement, and the transverse shear reinforcement is perpendicular to the longitudinal through-length reinforcement and the pre-embedded reinforcement respectively.

The invention further discloses an assembly method of a special-shaped prefabricated prestressed wall connection structure, which includes the following steps:

Step 1, according to the design requirements of the building structure, determine the specifications and sizes of the various components on the shear wall panel and the prestressed wall;

Step 2: Prefabricate the shear wall panel in the factory, and reserve the grouting opening and the grout outlet channel of the grouting sleeve on the shear wall panel in advance during the production process; prefabricate the prestressed wall in the factory, and apply the pretension stress;

Step 3: When connecting the shear wall panel to the prestressed wall, insert each pre-embedded steel bar into a grouting sleeve so that the clamping groove and the clamping edge are in close contact; Connection of force wall panels and prestressed walls;

Step 4: Concrete is poured in the longitudinal grooves on the shear wall panels and prestressed walls without formwork; after all the longitudinal grooves are poured, pour concrete into the grouting sleeves through the grouting openings on each shear wall panel Grout until the grouting job on each shear wall panel is complete, done.

Further, the specifications and dimensions described in step 1 include: the size of the shear wall panel, the size of the prestressed wall, the specification and spacing of the grouting sleeve, the diameter, spacing, pre-embedded length and anchorage length of the pre-embedded reinforcement, the pre-embedded The diameter and spacing of stress reinforcement, the diameter and spacing of longitudinal through-length reinforcement, the diameter and spacing of transverse shear reinforcement, and the size of the edge and groove.

Compared with the prior art, the present invention has the following technical characteristics:

1. The present invention provides a new structure and method for solving the current single horizontal connection mode of prefabricated assembly shear walls, which effectively simplifies the construction process and realizes the rapid horizontal connection of prefabricated assembly shear walls;

2. Prestressed steel bars are used in the concrete of the core area of the special-shaped prefabricated prestressed wall to apply prestressed force, which is conducive to improving the mechanical performance of the shear wall and improving the earthquake resistance;

3. A closed well is formed at the joint between the wall and the wall panel, and no formwork is required for post-cast concrete, which is conducive to improving the construction speed and reducing production costs;

4. The longitudinal full-length steel bar arranged along the closed groove well is bound and connected with the transverse shear steel bar along the thickness direction to form a steel mesh sheet, which provides strong restraint for the post-cast concrete and improves the mechanical performance of the post-cast concrete;

5. The contact surface at the joint between the wall and the wallboard forms a leak-proof joint through the card groove and the card edge, which can effectively prevent the grout from flowing out from the contact surface when the concrete is poured afterwards;

6. The prefabricated prestressed wall body of the present invention can be set into special-shaped structures such as cross-shaped, straight-shaped, L-shaped, T-shaped, etc. according to actual engineering needs, so as to meet different construction requirements.

Description of drawings

Fig. 1 is the assembling schematic diagram of special-shaped prefabricated prestressed wall connection structure of the present invention;

Fig. 2 is the structural representation of prestressed body of wall part;

Fig. 3 is the structural representation of shear wall panel part;

Fig. 4 is the schematic diagram of the cross-sectional structure of the structure shown in Fig. 1;

Figure 5(a) is a schematic diagram of the assembly process of the prestressed wall and the shear wall panel (during the assembly of the first two shear wall panels);

Figure 5(b) is a schematic diagram of the assembly process of the prestressed wall and the shear wall panel (when two shear wall panels are assembled);

Figure 6(a) is a schematic diagram of the structure when there are two connectors around the base body in the shape of a "one";

Figure 6(b) is a schematic diagram of the structure when there are two connectors around the substrate in an "L" shape;

Figure 6(c) is a schematic diagram of the structure when there are three connectors around the matrix in a "T" shape;

The symbols in the figure represent: 1—shear wall panel, 2—prestressed wall, 201—substrate, 202—connector, 3—grouting sleeve, 4—embedded steel bar, 5—prestressed steel bar, 6—longitudinal channel Long steel bar, 7—horizontal shearing reinforcement, 8—longitudinal groove well, 9—leak stop, 10—longitudinal groove, 11—carding edge, 12—carding groove.

Detailed ways

As shown in the figure, the present invention discloses a special-shaped prefabricated prestressed wall connection structure, including a shear wall panel 1 and a prestressed wall 2, and the prestressed wall 2 includes a base body 201 and is distributed around the base body 201 The connecting body 202, the connecting body 202 is provided with a longitudinal groove 10, and the longitudinal groove 10 passes through the top surface, the bottom surface of the connecting body 202 and the side away from the base body 201; the shear wall panel One side of 1 is connected to the longitudinal groove 10, so that the longitudinal groove 10 forms a longitudinal well 8; the prestressed steel bars 5 penetrating the top and bottom surfaces of the matrix 201 are distributed in the matrix 201, Transverse shear reinforcement bars 7 crossing the longitudinal groove 10 are pre-embedded in the longitudinal groove 10, and a pre-embedded steel bar 4 is arranged between the shear wall panel 1 and the prestressed wall body 2. One end of the buried steel bar 4 is located in the matrix 201 , and the other end passes through the longitudinal groove 10 and extends into the shear wall panel 1 .

Both the prestressed wall body 2 and the shear wall panel 1 in the present invention are prefabricated structures, wherein the prestressed wall body 2 is composed of two parts, one is the base body 201 located in the middle, and the other is the connection set around the base body 201 body 202, a connecting body 202 corresponds to a shear wall panel 1; the connecting body 202 can be provided with one or more according to actual needs to form different special-shaped structures, as shown in Figure 6 (a), Figure 6 (b) and As shown in Fig. 6(c), two connectors 202 are provided in Fig. 6(a) and Fig. 6(b). "L"-shaped structure; in FIG. 6(c), three connectors 202 are provided, which is a "T"-shaped structure. In this embodiment, taking FIG. 1 as an example, four connecting bodies 202 are arranged at intervals around the base body 201, so that the prestressed wall as a whole has a "cross"-shaped structure. There is no fixed requirement on the specific shapes of the base body 201 and the connecting body 202. Preferably, the connecting body 202 is a rectangular body structure, while the base body 201 can be a rectangular body structure with four sides of equal size. When four connecting bodies are provided 202 , each side of the base body 201 is connected to a connection body 202 .

In order to facilitate subsequent concrete pouring and the firmness of the overall structure, a longitudinal groove 10 is provided on the connecting body 202 in this solution, and the length (height) direction of the longitudinal groove 10 is the height of the connecting body 202 direction, in actual use, the said length direction is the direction perpendicular to the ground. The longitudinal groove 10 is a three-way transparent structure, that is, the two ends of the longitudinal groove 10 pass through the top surface and the bottom surface of the connecting body 202, and one side of the longitudinal groove 10 passes through the farthest side of the connecting body 202 from the base 201. side. The shear wall panel 1 is installed on the side of the longitudinal groove 10 of the prestressed wall body 2, and is coplanar with the connecting body 202, so that the shear wall panel 1 seals the longitudinal groove 10 The opening on the side makes the longitudinal groove 10 form a longitudinal well 8. At this time, only the upper and lower ends of the longitudinal groove 10 are transparent, and the cross section is a rectangular structure; the longitudinal well 8 is used for perfusion concrete. The height and thickness of the shear wall panel 1 and the connecting body 202 are the same. In this embodiment, preferably, the cross-sectional dimension of the longitudinal groove 10 is 200mm×100mm.

In this solution, steel bars are preset at different positions of the shear wall panel 1 and the prestressed wall 2 to ensure the overall mechanical properties of the connection structure. Specifically, a plurality of prestressed steel bars 5 are distributed in the matrix 201 of the prestressed wall 2, and the laying direction of the prestressed steel bars 5 is the height direction of the matrix 201, and the plurality of prestressed steel bars 5 are parallel to each other. , and its two ends pass through the top surface and bottom surface of the matrix 201; in this embodiment, the prestressed steel bars 5 are provided with 4 pieces, each of which has a diameter of at least 20mm; The shear reinforcement 7, the transverse shear reinforcement 7 crosses the longitudinal groove 10, that is, the laying direction of the transverse shear reinforcement 7 is the width direction of the longitudinal groove 10, and the length of the transverse shear reinforcement 7 is greater than the The width of the longitudinal groove 10; the diameter of the transverse shear reinforcement 7 is at least 10mm, and the length is at least 160mm, so as to effectively strengthen the shear resistance of the connection.

The connection between the shear wall panel 1 and the prestressed wall body 2 is achieved by using a pre-embedded steel bar 4. Specifically, one end of the pre-embedded steel bar 4 extends into the base body 201, and the other One end passes through the longitudinal groove 10, leaving an anchorage length of at least 200mm, and this part extends into the shear wall panel 1, so that the shear wall panel 1 and the connecting body 202 are connected together .

Optionally, as shown in FIG. 2 and FIG. 3 , the connectors 202 on both sides of the longitudinal groove 10 are symmetrically provided with card slots 12 along the length direction of the longitudinal groove 10 , and the shear wall panel 1 A pair of card edges 11 matching the card slot 12 are provided on the side of the wall; that is, the card slot 12 is set on the outer wall of the longitudinal groove 10, and the card edge 11 is located On both sides of the side, when the shear wall panel 1 and the prestressed wall 2 are docked, the card slot 12 is inserted into the inside of the card edge 11, and a "Z"-like leak-proof joint 9 is formed at the joint , It can effectively prevent the grout from flowing out from the joint when the concrete is poured afterward. Preferably, along the thickness direction of the shear wall panel 1, the thickness of the card edge 11 is 20 mm, and perpendicular to the thickness direction, the length of the card edge 11 is 30 mm; the size of the card slot 12 is the same as that of the card Correspondence along 11.

In order to further improve the mechanical performance of the shear wall panel 1 and the prestressed wall panel, and improve the earthquake resistance, in this scheme, longitudinal long steel bars 6 parallel to the prestressed steel bars 5 are distributed inside the longitudinal groove 10, and the longitudinal through long steel bars 6 are distributed in the longitudinal groove 10. The long steel bar 6 is bound and connected with the described transverse shear steel bar 7, and the diameter of the longitudinal long steel bar 6 is at least 10mm; , the mechanical connection between the longitudinal full-length steel bars 6 arranged in the adjacent longitudinal grooves 8, such as overlapping. The longitudinal through-length steel bar 6 and the transverse shear steel bar 7 are bound and connected to form a steel mesh sheet, which provides strong restraint for the post-cast concrete.

Further, grouting sleeves 3 leading to the interior of the shear wall panel 1 are distributed on the side of the shear wall panel 1, and the laying direction of the grouting sleeve 3 is perpendicular to the prestressed steel bars 5, and is in line with the pre-embedded The reinforcing bars 4 are arranged coaxially, and the ends of the pre-embedded reinforcing bars 4 extend into the grouting sleeve 3 , thereby connecting the shear wall panel 1 and the prestressed wall body 2 . In addition, during laying, the pre-embedded steel bar 4 is perpendicular to the prestressed steel bar 5, and the transverse shear steel bar 7 is perpendicular to the longitudinal full-length steel bar 6 and the pre-embedded steel bar 4 respectively.

In this scheme, the shear wall panel 1 and the prestressed wall 2 are first assembled and formed by inserting the pre-embedded steel bar 4 into the grouting sleeve 3, then pouring concrete in the formed longitudinal well 8, and finally performing grouting to complete the final Connection.

On the basis of the above technical solution, the present invention further provides a method for assembling the connection structure of the special-shaped prefabricated prestressed wall body 2, comprising the following steps:

Step 1, according to the design requirements of the building structure, determine the specifications and sizes of the various components on the shear wall panel 1 and the prestressed wall body 2, including: the size of the shear wall panel 1, the size of the prestressed wall body 2, and the size of the grouting sleeve 3 Specifications and spacing, diameter, spacing, embedded length and anchorage length of pre-embedded steel bars 4, diameter and spacing of prestressed steel bars 5, diameter and spacing of longitudinal long steel bars 6, diameter and spacing of transverse shearing steel bars 7, clamping Dimensions along 11 and slot 12;

Step 2, according to the determined size of the shear wall panel 1, prefabricate the shear wall panel 1 (including each steel bar on the wall panel) in the factory, and leave a grouting sleeve on the shear wall panel 1 in advance during the manufacturing process The grouting port and the grouting port channel of the cylinder 3, to prevent the passage described in the pouring process from being blocked by concrete; according to the determined size of the prestressed wall 2, prefabricated the prestressed wall 2 (including the wall) in the factory Each steel bar above), adopt pre-tensioning method to apply prestress; Among them, the horizontal shear steel bar 7 needs to be fixed in position before pouring concrete, and the longitudinal full-length steel bar 6 is bound after the formwork is removed;

Step 3, when the shear wall panel 1 is connected to the prestressed wall 2, each pre-embedded steel bar 4 is correspondingly inserted into a grouting sleeve 3 to ensure that the clamping groove 12 and the clamping edge 11 are in close contact (ie There is no gap between the two); the same method is used to sequentially complete the connection of each shear wall panel 1 and prestressed wall body 2;

Step 4: Concrete is poured in the longitudinal grooves 8 on the shear wall panels 1 and the prestressed walls 2 without formwork; after all the longitudinal grooves 8 are poured, grouting is carried out on each shear wall panel 1 in turn The mouth is grouted in the grouting sleeve 3 until the grouting operation on each shear wall panel 1 is completed.

It should be noted that the present invention is not only applicable to the above-mentioned cross-shaped node connection, but also applicable to "one", "L" and "T"-shaped node connections, and the specific implementation method is the same as above.

Claims (9)

1. A special-shaped prefabricated prestressed wall connection structure, characterized in that it comprises a shear wall panel (1) and a prestressed wall (2), and the described prestressed wall (2) includes a matrix (201) and The connectors (202) distributed around the base (201), the connectors (202) are provided with longitudinal grooves (10), and the longitudinal grooves (10) pass through the top of the connectors (202) surface, bottom surface and the side away from the base (201); one side of the shear wall panel (1) is connected to the longitudinal groove (10), so that the longitudinal groove (10) forms a longitudinal groove well (8); the prestressed steel bars (5) penetrating the top and bottom surfaces of the matrix (201) are distributed in the matrix (201), and the longitudinal grooves (10) are pre-embedded with The transverse shear reinforcement (7) of the longitudinal groove (10), the embedded reinforcement (4) is arranged between the shear wall panel (1) and the prestressed wall (2), and the embedded reinforcement (4) One end is located in the base body (201), and the other end passes through the longitudinal groove (10) and extends into the shear wall panel (1). 2. The special-shaped prefabricated prestressed wall connection structure according to claim 1, characterized in that, the connectors (202) on both sides of the longitudinal groove (10) are along the longitudinal direction of the longitudinal groove (10). Card slots (12) are symmetrically opened, and a pair of card edges (11) matching with the card slots (12) are arranged on the side of the shear wall panel (1). 3. The special-shaped prefabricated prestressed wall connection structure as claimed in claim 1, characterized in that, the inside of the longitudinal groove (10) is distributed with longitudinal long steel bars parallel to the prestressed steel bars (5) ( 6), the longitudinal through-length reinforcing bar (6) is bound and connected with the transverse shearing reinforcing bar (7). 4. The special-shaped prefabricated prestressed wall connecting structure as claimed in claim 1, characterized in that grouting sleeves leading to the inside of the shear wall panel (1) are distributed on the side of the shear wall panel (1) tube (3), and the end of the embedded steel bar (4) extends into the grouting sleeve (3). 5. The special-shaped prefabricated prestressed wall connecting structure as claimed in claim 1, characterized in that, four connecting bodies (202) around the base (201) are arranged at intervals, so that the described prestressed wall ( 2) The overall structure is in the shape of a "ten". 6. The special-shaped prefabricated prestressed wall connecting structure according to claim 1, characterized in that, the height and thickness of the shear wall panel (1) and the connecting body (202) are the same. 7. The special-shaped prefabricated prestressed wall connection structure as claimed in claim 3, characterized in that, said pre-embedded reinforcement (4) is perpendicular to said prestressed reinforcement (5), and said transverse shear reinforcement (7) are respectively perpendicular to the described longitudinal full-length steel bars (6) and pre-embedded steel bars (4). 8. An assembly method of a special-shaped prefabricated prestressed wall connection structure, characterized in that it comprises the following steps: Step 1, according to the design requirements of the building structure, determine the specifications and sizes of the various components on the shear wall panel (1) and the prestressed wall (2); Step 2, prefabricating the shear wall panel (1) in the factory, leaving the grouting port and the grout outlet channel of the grouting sleeve (3) on the shear wall panel (1) in advance during the manufacturing process; prefabricating the prestressed wall panel in the factory The wall (2) is prestressed by pretensioning; Step 3, when the shear wall panel (1) is connected to the prestressed wall (2), each pre-embedded steel bar (4) is correspondingly inserted into a grouting sleeve (3), so that the clamping groove ( 12) Close contact with the card edge (11); complete the connection of each shear wall panel (1) and prestressed wall body (2) sequentially in the same way; Step 4, pouring concrete in the longitudinal wells (8) on the shear wall panel (1) and the prestressed wall (2), without formwork support; after all the longitudinal wells (8) have been poured, each The shear wall panels (1) are grouted in the grouting sleeve (3) through the grout opening until the grouting operation on each shear wall panel (1) is completed. 9. The assembly method of the special-shaped prefabricated prestressed wall body connecting structure as claimed in claim 8, is characterized in that, the specification size described in step 1 comprises: the size of the shear wall panel (1), the body of prestressed wall ( 2) Dimensions, specifications and spacing of grouting sleeves (3), diameter, spacing, pre-embedded length and anchorage length of pre-embedded steel bars (4), diameter and spacing of prestressed steel bars (5), longitudinal full-length steel bars (6 ), the diameter and the spacing of the transverse shear reinforcement (7), the size of the card edge (11) and the card groove (12).