Prefabricated concrete outer wall with high waterproof performance and connecting joint thereof

Abstract

The utility model discloses a prefabricated concrete outer wall with excellent waterproof performance and a connecting node thereof, the prefabricated concrete outer wall comprises a prefabricated concrete wall body which is internally provided with a wall body steel bar frame, and two ends of the prefabricated concrete wall body along the length direction are integrally poured to form wing plates which are protruded and symmetrically distributed; the outer side surfaces of the wing plates are flush with the outer side surface of the prefabricated concrete wall body, constructional column grooves are formed between the inner side surfaces of the wing plates and the end face of the prefabricated concrete wall body, and the constructional column grooves are distributed in the height direction of the prefabricated concrete wall body; the two ends, in the length direction, of the prefabricated concrete wall body are provided with a plurality of splicing steel bars stretching into the grooves of the constructional columns. The constructional column grooves and the splicing reinforcing steel bars are arranged at the wing plates, the constructional column formed through pouring can be matched with the arranged PE rods and sealant to form a waterproof structure, and the waterproof performance of the splicing position of the prefabricated outer wall is effectively improved through the combination of materials and structural waterproof.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled building engineering, in particular to a prefabricated concrete exterior wall with high-quality waterproof performance and a connection node thereof. Background Art

[0002] At present, prefabricated structures have been widely used in housing construction. This construction model uses production plants to make prefabricated components, including beams, slabs, columns, stairs, etc., which are transported to the construction site for assembly to form a building; therefore, prefabricated buildings have the characteristics of modularization, factory production and environmental protection. At present, in the installation process of prefabricated buildings, the technology of nodes is particularly critical, including beams and columns, beams and slabs, wall beams and walls, etc. Among them, the connection of two prefabricated exterior walls, according to traditional practices, is through the "2+1" model, that is, two material waterproofing plus one structural waterproofing, filling the splicing gaps between the indoor and outdoor prefabricated concrete wall panels with waterproof materials and the middle decompression cavity structure. This traditional splicing method will have the problem of poor waterproof performance at the splicing position of the prefabricated exterior wall. Utility Model Content

[0003] The purpose of the utility model is to provide a precast concrete exterior wall and its connection nodes with high-quality waterproof performance, adopting a "1+2" ​​mode, that is, one material waterproofing plus two structural waterproofing, replacing the waterproof material on one side of the interior with a composite column structure cast once, forming a waterproof structure of "waterproof material-decompression cavity-composite structural column" from outdoor to indoor, and effectively improving the waterproof performance of the splicing position of the precast exterior wall through the combination of material and structural waterproofing, preventing the room at the splicing position of the wall panel from getting damp and affecting the usability of the house, and well solving the problem of poor waterproof performance of the splicing node position of the traditional precast concrete exterior wall mentioned in the above background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, a precast concrete exterior wall with high-quality waterproof performance is provided, comprising a precast concrete wall containing a wall steel frame inside, wherein the precast concrete wall is integrally cast at both ends along the length direction to form protruding and symmetrically distributed wing plates, the outer surface of the wing plate is flush with the outer surface of the precast concrete wall, and a structural column groove is formed between the inner surface of the wing plate and the end face of the precast concrete wall, and the structural column groove is distributed along the height direction of the precast concrete wall; a plurality of spliced ​​steel bars extending into the structural column grooves are provided at both ends along the length direction of the precast concrete wall, and a plurality of beam steel bars extend from the top of the precast concrete wall.

[0006] Furthermore, the surface of the structural column groove is a water-washed surface structure with concave and convex distribution, so that the concrete for casting the structural column can be firmly combined with the surface of the structural column groove, thereby improving the connection between the structural column formed by subsequent casting and the precast concrete wall.

[0007] Furthermore, each spliced ​​steel bar is distributed in parallel, and the spliced ​​steel bars are symmetrically distributed along both ends of the precast concrete wall.

[0008] Furthermore, the spliced ​​steel bar is a circular steel bar in the shape of a rounded rectangle, one end of the spliced ​​steel bar is embedded in the interior of the precast concrete wall and connected to the wall steel bar frame, and the other end of the spliced ​​steel bar extends into the groove of the structural column.

[0009] Furthermore, the wall reinforcement frame includes a plurality of wall reinforcement meshes and a plurality of wall longitudinal reinforcements, the wall reinforcement meshes are arranged at intervals along the height direction of the precast concrete wall, the wall longitudinal reinforcements are arranged in parallel along the height direction of the precast concrete wall, and the wall longitudinal reinforcements extend out of the precast concrete wall to form the beam reinforcement.

[0010] Furthermore, the wall steel mesh includes a first horizontal steel bar and a second horizontal steel bar distributed in parallel, the first horizontal steel bar is distributed close to the outer side of the precast concrete wall, the second horizontal steel bar is distributed close to the inner side of the precast concrete wall, and both ends of the second horizontal steel bar are respectively bent to form a lap joint connected to the first horizontal steel bar.

[0011] Furthermore, both ends of the first horizontal steel bar are bent to form first hook portions, so as to facilitate binding and connection with the longitudinal steel bars of the wall located at the wing plate.

[0012] Furthermore, the wall steel mesh located at the bottom is provided with at least one U-shaped reinforcing steel bar; at least one anchor steel bar is provided between the first horizontal steel bar and the second horizontal steel bar, and the two ends of the anchor steel bar are respectively bent to form a second hook portion so as to be tied and connected with the first horizontal steel bar or the second horizontal steel bar.

[0013] In the second aspect, a connection node at the joint of a precast concrete exterior wall is also provided, comprising a cast-in-place structural column and at least one of the above-mentioned precast concrete exterior walls overlapped and connected with the structural column, wherein the structural column is located in a structural column groove on the precast concrete exterior wall; the interior of the structural column is provided with a plurality of structural column stirrups connected with the spliced ​​steel bars and a plurality of structural column longitudinal bars connected with the structural column stirrups, and the precast concrete exterior wall is provided with a PE rod at the joint of the wing plate.

[0014] Furthermore, the joints of the prefabricated concrete exterior wall at the wing plate are also provided with galvanized steel plates and sealants, which are respectively located on both sides of the PE rod, and the galvanized steel plates are in contact with the surface of the groove of the structural column. In this way, a waterproof structure of "waterproof material-decompression cavity-superimposed structural column" from outdoor to indoor can be formed, and the waterproof performance of the joints of the prefabricated exterior wall can be effectively improved by combining material and structural waterproofing.

[0015] Compared with the prior art, the utility model provides a prefabricated concrete exterior wall with high-quality waterproof performance and its connection node, which has the following beneficial effects:

[0016] The utility model provides structural column grooves and spliced ​​steel bars at the wing plates, so as to facilitate casting of structural columns at the splicing node positions of precast concrete exterior walls, and provides PE rods and sealants to form a waterproof structure of "waterproof material-decompression cavity-overlapping structural columns" from outdoor to indoor. By combining material and structural waterproofing, the waterproof performance of the splicing position of the precast exterior wall is effectively improved, and the room at the splicing position of the wall panels is prevented from getting damp and affecting the usability of the house. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the precast concrete exterior wall;

[0019] Figure 2 This is the elevation drawing of the precast concrete exterior wall;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross section along the BB direction;

[0022] Figure 5 is a schematic diagram of the overlap between the first horizontal steel bar and the second horizontal steel bar;

[0023] Figure 6 It is a schematic diagram of the overlapping and splicing of two adjacent precast concrete exterior walls;

[0024] Figure 7 It is a structural diagram of the first type of connection node;

[0025] Figure 8 is a schematic diagram of the structure of the second type of connection node;

[0026] Fig. 9 This is a schematic diagram of the structure of the third type of connection node.

[0027] Figure numerals: 100, precast concrete exterior wall; 1, precast concrete wall; 11, wing plate; 12, structural column groove; 121, first contact surface; 122, second contact surface; 2, wall reinforcement frame; 21, wall reinforcement mesh; 211, first horizontal reinforcement; 2111, first hook portion; 212, second horizontal reinforcement; 2121, lap portion; 213, anchor reinforcement; 2131, second hook portion; 22, wall longitudinal reinforcement; 23, U-shaped reinforcement; 3, spliced ​​reinforcement; 4, beam reinforcement; 200, structural column; 201, structural column stirrups; 202, structural column longitudinal reinforcement; 300, splicing seam; 400, PE rod; 500, galvanized steel plate; 600, sealant; 700, precast lightweight interior partition wall. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] Please refer to Figure 1 to Figure 5 This embodiment provides a prefabricated concrete exterior wall 100 with high-quality waterproof performance, which can be prefabricated in advance by a factory.

[0031] Specifically, the precast concrete exterior wall 100 includes a precast concrete wall 1 containing a wall reinforcement frame 2 inside, and the precast concrete wall 1 is integrally cast at both ends along the length direction to form protruding and symmetrically distributed wing panels 11, the outer surface of the wing panel 11 is flush with the outer surface of the precast concrete wall 1, and a structural column groove 12 is formed between the inner surface of the wing panel 11 and the end face of the precast concrete wall 1, which can reserve a position for overlapping structural columns at the splicing of precast concrete wall panels, and the structural column groove 12 is distributed along the height direction of the precast concrete wall 1; a plurality of splicing steel bars 3 extending into the structural column groove 12 are provided at both ends along the length direction of the precast concrete wall 1, and a plurality of beam steel bars 4 extend from the top of the precast concrete wall 1. By setting structural column grooves and spliced ​​steel bars at the wing plates, and locating them on the indoor side, it is convenient to use spliced ​​composite structural columns to connect at the splicing nodes of the precast concrete exterior wall. By using the structural columns formed by pouring and the set PE rods and sealants, a waterproof structure of "waterproof material-decompression cavity-composite structural column" from outdoor to indoor is formed. Through the combination of material and structural waterproofing, the waterproof performance of the splicing position of the precast exterior wall is effectively improved, preventing the room at the splicing position of the wall panel from getting damp and affecting the usability of the house.

[0032] In some specific embodiments, the surface of the structural column groove 12 is a water-washed surface structure with a concave-convex distribution, so that the concrete for casting the structural column can be firmly combined with the surface of the structural column groove, thereby improving the connection between the structural column formed by subsequent casting and the precast concrete wall. As an example, the water-washed surface is concave-convex with a distribution of 4mm.

[0033] In some specific embodiments, such as Figure 4 As shown, the structural column groove 12 has a vertically distributed first contact surface 121 and a second contact surface 122, and the first contact surface 121 is vertically connected to the inner surface of the precast concrete wall 1. Preferably, the first contact surface 121 is a water-wash surface structure with a concave-convex distribution of 4mm.

[0034] As a preferred embodiment, Figure 2 As shown, each spliced ​​steel bar 3 is distributed in parallel, and the spliced ​​steel bars 3 are symmetrically distributed along the two ends of the precast concrete wall 1 .

[0035] More specifically, as an example, Figure 4 As shown, the spliced ​​steel bar 3 is a circular steel bar in the shape of a rounded rectangle. One end of the spliced ​​steel bar 3 is embedded in the interior of the precast concrete wall 1 and is tied and connected to the wall steel bar frame 2, and the other end of the spliced ​​steel bar 3 extends into the structural column groove 12.

[0036] In some specific embodiments, reference Figure 3 to Figure 5The wall reinforcement frame 2 includes a plurality of wall reinforcement meshes 21 and a plurality of wall longitudinal reinforcements 22. The wall reinforcement meshes 21 are arranged at intervals along the height direction of the precast concrete wall 1, and the wall longitudinal reinforcements 22 are arranged in parallel along the height direction of the precast concrete wall 1. The wall longitudinal reinforcements 22 extend out of the outside of the precast concrete wall 1 to form the beam reinforcement 4.

[0037] More specifically, Figure 4 and Figure 5 As shown, the wall reinforcement mesh 21 includes a first horizontal reinforcement 211 and a second horizontal reinforcement 212 that are distributed in parallel. The first horizontal reinforcement 211 is distributed close to the outer side of the precast concrete wall 1, and the second horizontal reinforcement 212 is distributed close to the inner side of the precast concrete wall 1. Both ends of the second horizontal reinforcement 212 are bent to form a lap joint 2121 for binding and connecting with the first horizontal reinforcement 211. As an example, Figure 5 As shown, the overlapping portion 2121 is L-shaped.

[0038] As an improved implementation, Figure 5 As shown, both ends of the first horizontal steel bar 211 are bent to form first hook portions 2111 , so as to facilitate binding and connection with the wall longitudinal steel bars 22 located at the wing plate 11 .

[0039] As an improved implementation, Figure 3 As shown, the wall reinforcement mesh at the bottom is provided with at least one U-shaped reinforcement steel bar 23; preferably, a plurality of U-shaped reinforcement steel bars 23 are provided, and the plurality of U-shaped reinforcement steel bars 23 are distributed along the length direction of the precast concrete wall 1. At least one anchoring steel bar 213 is provided between the first horizontal steel bar 211 and the second horizontal steel bar 212, and the two ends of the anchoring steel bar 213 are respectively bent to form a second hook portion 2131, so as to be tied and connected with the first horizontal steel bar or the second horizontal steel bar. As an example, three anchoring steel bars are provided between the first horizontal steel bar and the second horizontal steel bar.

[0040] Example 2

[0041] refer to Figure 6 to Figure 9 The present embodiment provides a connection node at the joint of a precast concrete exterior wall, comprising a cast-in-place structural column 200 and at least one precast concrete exterior wall 100 in Embodiment 1 that is overlapped and connected with the structural column 200, wherein the structural column 200 is located in a structural column groove 12 on the precast concrete exterior wall 100; the interior of the structural column 200 is provided with a plurality of structural column stirrups 201 connected to the splicing steel bars 3 and a plurality of structural column longitudinal bars 202 connected to the structural column stirrups 201, and the precast concrete exterior wall 100 is provided with a PE rod 400 at the splicing joint 300 at the wing plate 11.

[0042] Furthermore, the joint seam 300 of the precast concrete exterior wall 100 at the wing plate 11 is also provided with a galvanized steel plate 500 and a sealant 600, which are respectively located on both sides of the PE rod 400, and the galvanized steel plate 500 is in contact with the surface of the structural column groove 12. The PE rod and the sealant can greatly improve the sealing performance, thereby achieving a better waterproof effect. In this way, a waterproof structure of "waterproof material-decompression cavity-superimposed structural column" from outdoor to indoor can be formed, and the waterproof performance of the splicing position of the precast exterior wall can be effectively improved by combining material and structural waterproofing.

[0043] During construction, the prefabricated concrete exterior wall can be transported to the construction site first, and then Figure 7 to Figure 9 Different node connection forms are used to tie the steel bars of the composite structural columns. The process is to place the structural column stirrups first and then the structural column longitudinal bars. After completion, the molds are sealed and cast. After solidification, the molds are removed, and the wall panel splicing positions are checked to see if they meet the sealing requirements before completing the outdoor sealing.

[0044] Specifically, in an application example, Figure 7 As shown, the connection node includes a cast-in-place structural column 200 and two precast concrete exterior walls 100 in Embodiment 1 that are overlapped and connected with the structural column 200. A complete wall is formed by splicing the structural column 200 and the two precast concrete exterior walls 100.

[0045] In two other application examples, Figure 8 As shown, the connection node includes a cast-in-place structural column 200 and a precast concrete exterior wall 100 in Embodiment 1 that is overlapped and connected with the structural column 200 , and the structural column 200 is used to connect the precast concrete exterior wall 100 to other walls.

[0046] In other application examples, such as Fig. 9 As shown, the connection node includes a cast-in-place structural column 200 and two precast concrete exterior walls 100 in Example 1 that are overlapped and connected to the structural column 200. The structural column 200 and the two precast concrete exterior walls 100 are spliced ​​to form a complete wall. At the same time, the structural column 200 is connected to a prefabricated lightweight interior partition wall 700 on the side away from the splicing seam 300 between the precast concrete exterior walls.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A precast concrete exterior wall with high-quality waterproof performance, comprising a precast concrete wall with a wall reinforcement frame inside, characterized in that: The precast concrete wall is integrally cast at both ends along the length direction to form protruding and symmetrically distributed wing plates, the outer surface of the wing plate is flush with the outer surface of the precast concrete wall, and a structural column groove is formed between the inner surface of the wing plate and the end face of the precast concrete wall, and the structural column groove is distributed along the height direction of the precast concrete wall; a plurality of spliced ​​steel bars extending into the structural column grooves are provided at both ends along the length direction of the precast concrete wall, and a plurality of beam steel bars extend from the top of the precast concrete wall.

2. The precast concrete exterior wall with high-quality waterproof performance according to claim 1, characterized in that: The surface of the groove of the structural column is a water-wash surface structure with concave and convex distribution.

3. The precast concrete exterior wall with high-quality waterproof performance according to claim 1, characterized in that: The various spliced ​​steel bars are distributed in parallel, and the spliced ​​steel bars are distributed symmetrically along both ends of the precast concrete wall.

4. The precast concrete exterior wall with high-quality waterproof performance according to claim 3 is characterized in that: The spliced ​​steel bar is a circular steel bar in the shape of a rounded rectangle. One end of the spliced ​​steel bar is embedded in the interior of the precast concrete wall and connected to the wall steel bar frame, and the other end of the spliced ​​steel bar extends into the groove of the structural column.

5. The precast concrete exterior wall with high-quality waterproof performance according to claim 1, characterized in that: The wall reinforcement frame includes a plurality of wall reinforcement meshes and a plurality of wall longitudinal reinforcements. The wall reinforcement meshes are arranged at intervals along the height direction of the precast concrete wall, and the wall longitudinal reinforcements are arranged in parallel along the height direction of the precast concrete wall. The wall longitudinal reinforcements extend out of the precast concrete wall to form the beam reinforcements.

6. The precast concrete exterior wall with high-quality waterproof performance according to claim 5, characterized in that: The wall steel mesh includes a first horizontal steel bar and a second horizontal steel bar distributed in parallel, wherein the first horizontal steel bar is distributed close to the outer side of the precast concrete wall, and the second horizontal steel bar is distributed close to the inner side of the precast concrete wall, and both ends of the second horizontal steel bar are respectively bent to form a lap joint connected to the first horizontal steel bar.

7. The precast concrete exterior wall with high-quality waterproof performance according to claim 6, characterized in that: Both ends of the first horizontal steel bar are bent to form first hook portions.

8. The precast concrete exterior wall with high-quality waterproof performance according to claim 6, characterized in that: The wall steel mesh located at the bottom is provided with at least one U-shaped reinforcing steel bar; at least one anchoring steel bar is provided between the first horizontal steel bar and the second horizontal steel bar, and both ends of the anchoring steel bar are respectively bent to form a second hook portion.

9. A connection node at a joint of a precast concrete exterior wall, characterized in that: It comprises a cast-in-place structural column and at least one precast concrete exterior wall as described in any one of claims 1 to 8 which is overlapped and connected with the structural column, wherein the structural column is located in a structural column groove on the precast concrete exterior wall; a plurality of structural column stirrups connected with the spliced ​​steel bars and a plurality of structural column longitudinal bars connected with the structural column stirrups are arranged inside the structural column, and a PE rod is arranged at the splicing seam of the precast concrete exterior wall at the wing plate.

10. The connection node according to claim 9, characterized in that: The joints of the precast concrete exterior wall at the wing panels are further provided with galvanized steel plates and sealants, which are respectively located on both sides of the PE rods, and the galvanized steel plates are fitted to the surface of the structural column grooves.

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