Wet joint structure of sandwich heat preservation prefabricated shear wall and construction method

Abstract

The invention discloses a sandwich heat preservation prefabricated shear wall wet joint structure and a construction method, realizes reliable transverse and longitudinal connection of a sandwich heat preservation prefabricated shear wall, and solves the difficulty that long load-bearing steel bars need to penetrate through in the existing research. According to the technical scheme, a heat preservation layer is arranged between an inner wall plate and an outer wall plate, a first embedded steel plate is arranged at the end of the inner wall plate, a second embedded steel plate is arranged at the end of the outer wall plate, transverse steel bars and longitudinal steel bars are arranged in the inner wall plate and the outer wall plate, and concrete is poured in the inner wall plate and the outer wall plate; the transverse reinforcements and the longitudinal reinforcements form a reinforcement cage structure; a first edge sealing steel plate is arranged on the side face between every two adjacent sections of inner wall plates. Second edge sealing steel plates are arranged on the side faces between the adjacent sections of the outer wall plates. Longitudinal steel bars in the inner wall plate and a first side edge sealing steel plate are fixedly connected with the first embedded steel plate, and longitudinal steel bars in the outer wall plate and a second side edge sealing steel plate are fixedly connected with the second embedded steel plate.

Description

Technical Field

[0001] The invention belongs to the technical field of shear wall connection, and in particular relates to a sandwich insulation prefabricated shear wall wet joint structure and a construction method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Conventional sandwich insulation prefabricated shear walls are mainly connected by post-poured ordinary concrete combined with steel grouting sleeves. This connection method has high requirements on the precision of prefabricated components and the construction quality of grouting, is not convenient for quality inspection, and the reliability of steel bar connection is not easy to be effectively guaranteed. Therefore, it has not yet been applied and promoted in nuclear power plants. It is urgent to invent a new type of joint connection method to solve the above problems.

[0004] Publication No. CN115341683A proposes a concrete prefabricated shear wall sandwich insulation wall panel. The proposed insulation wall panel can be prefabricated with the shear wall, but the insulation material and the shear wall are bonded by glue. Due to the limited durability of the glue, there is a potential risk of falling off in the later stage. Publication No. CN107165268A proposes a double-row steel bar connection structure system for a prefabricated shear wall with insulation. The prefabricated shear wall with insulation connects the vertical steel bars of the upper and lower walls through a connection box, but fails to connect the left and right walls. The application scenarios are limited. The steel bar connection box will cause the horizontal steel bars to be unable to be arranged at the joint, making the connection part a weak point. Publication No. CN117188653A proposes a self-insulating assembled composite shear wall structure, which has a complicated installation process and poor feasibility. In addition, the connection quality described in this patent is difficult to guarantee, the connection reliability is low, and the problem of horizontal joint connection is not solved. Therefore, the above-mentioned problems existing in the prior art are not applicable to nuclear power plants. Summary of the invention

[0005] In view of the above problems, the present invention provides a sandwich insulation prefabricated shear wall wet joint structure and construction method, which realizes the reliable horizontal and vertical connection of the sandwich insulation prefabricated shear wall, solves the difficulty of passing through long stress-bearing steel bars in existing research, and reduces the difficulty of installing horizontal and vertical steel bars; the wet joint adopts UHPC (ultra-high performance concrete) to realize the effective anchoring and force transmission function of horizontal and vertical steel bars within the minimum joint width.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, the present invention provides a sandwich insulation prefabricated shear wall wet joint structure, comprising: a plurality of prefabricated shear walls, wherein a wet joint structure is arranged between adjacent prefabricated shear walls; each prefabricated shear wall is composed of an inner wall panel and an outer wall panel; an insulation layer is arranged between the inner wall panel and the outer wall panel, a first embedded steel plate is arranged at the end of the inner wall panel, and a second embedded steel plate is arranged at the end of the outer wall panel, transverse steel bars and longitudinal steel bars are arranged in the inner wall panel and the outer wall panel, and concrete is poured; the transverse steel bars and longitudinal steel bars form a steel cage structure;

[0008] Longitudinal reinforcing ribs are arranged between the first embedded steel plates of the inner wall panels of adjacent sections, longitudinal reinforcing ribs are arranged between the second embedded steel plates of the outer wall panels of adjacent sections, first edge-sealing steel plates are arranged on the sides between the inner wall panels of adjacent sections; second edge-sealing steel plates are arranged on the sides between the outer wall panels of adjacent sections; the first edge-sealing steel plate is fixedly connected to the first embedded steel plates of two adjacent sections, and the second edge-sealing steel plate is fixedly connected to the second embedded steel plates of two adjacent sections.

[0009] Furthermore, a plurality of anchoring bars are provided on a side of the first embedded steel plate close to the inner wall plate, and a plurality of anchoring bars are also provided on a side of the second embedded steel plate close to the outer wall plate.

[0010] Furthermore, the first embedded steel plate includes a first embedded bent steel plate and a first embedded straight steel plate, the embedded bent steel plate is arranged at one end of the inner wall plate, and the embedded straight steel plate is arranged at the other end of the inner wall plate.

[0011] Furthermore, the second embedded steel plate includes a second embedded bent steel plate and a second embedded straight steel plate, the second embedded bent steel plate is arranged at one end of the exterior wall panel, and the second embedded straight steel plate is arranged at the other end of the exterior wall panel.

[0012] Furthermore, the first pre-embedded bent steel plate and the first pre-embedded straight steel plate are arranged in adjacent sections, and the first pre-embedded bent steel plate and the first pre-embedded straight steel plate in adjacent sections are connected as one through the first edge-sealing steel plate on the side of the inner wall panel.

[0013] Furthermore, the second pre-embedded bent steel plate and the second pre-embedded straight steel plate are arranged in adjacent sections, and the second pre-embedded bent steel plate and the second pre-embedded straight steel plate in adjacent sections are connected as one through the second edge-sealing steel plate on the side of the exterior wall panel.

[0014] Furthermore, a plurality of the first pre-embedded bent steel plates or the first pre-embedded straight steel plates are evenly arranged at the end of each of the inner wall panels; a plurality of the longitudinal reinforcing rib plates are arranged between the first pre-embedded bent steel plates and the first pre-embedded straight steel plates, and are respectively fixedly connected to the first pre-embedded bent steel plates and the first pre-embedded straight steel plates of adjacent sections.

[0015] Furthermore, a plurality of the second pre-embedded bent steel plates or second pre-embedded straight steel plates are evenly arranged at the end of each of the exterior wall panels;

[0016] A plurality of longitudinal reinforcing ribs are provided between the second pre-embedded bent steel plates and the second pre-embedded straight steel plates, and are respectively fixedly connected to the second pre-embedded bent steel plates and the second pre-embedded straight steel plates of adjacent sections.

[0017] Furthermore, the prefabricated shear wall includes a vertical prefabricated shear wall and a horizontal prefabricated shear wall; a third edge-sealed steel plate is also provided at the lowest end of the vertical prefabricated shear wall for fixed connection with the ground.

[0018] In a second aspect, the present invention further provides a construction method for a sandwich insulation prefabricated shear wall wet joint structure, comprising the following steps:

[0019] S1. Arrange vertical steel bars and transverse steel bars in the inner wall panels and outer wall panels in advance; the vertical steel bars extend out of the inner wall panels and the outer wall panels by a set distance; a third embedded steel plate is set at the bottom of the vertical prefabricated shear wall, and no third embedded steel plate is required for the horizontal prefabricated shear wall;

[0020] S2. On the basis of S1, fix the prefabricated shear wall to the ground, and weld the third embedded steel plate to the anchoring steel plate on the ground. This step is not necessary for the horizontal prefabricated shear wall.

[0021] S3, splicing the adjacent sections of the prefabricated shear walls according to the set spacing, the vertical steel bars extending out of the set length of the end of the prefabricated shear wall, and inserting into the end of the adjacent section of the prefabricated shear wall; welding the first embedded bent steel plate and the first embedded straight steel plate of the adjacent section with the first edge-sealing steel plate; welding the second embedded bent steel plate and the second embedded straight steel plate of the adjacent section with the second edge-sealing steel plate;

[0022] S4. Pour UHPC concrete in the joint area and cure the UHPC concrete to the specified strength.

[0023] Compared with the prior art, the present invention has the following advantages and positive effects:

[0024] The present invention arranges transverse and longitudinal steel bars at the longitudinal joints of the sandwich insulation prefabricated shear wall and pours concrete, thereby realizing reliable transverse and longitudinal connection of the sandwich insulation prefabricated shear wall and realizing continuous transverse and longitudinal force transmission. By arranging longitudinal steel bars and the first embedded steel plate and the second embedded steel plate in the segmented prefabricated shear wall, the difficulty of passing long stress-bearing steel bars in existing research is solved, which can greatly improve the construction efficiency of concrete walls and reduce the difficulty of installing transverse and longitudinal steel bars; by arranging longitudinal reinforcing rib plates between the first embedded steel plates at the vertical / horizontal joints of the sandwich insulation prefabricated shear wall, arranging longitudinal reinforcing rib plates between the second embedded steel plates, and pouring concrete, the requirement for the joint width of the sandwich insulation prefabricated shear wall is minimized, and the effective anchoring and force transmission functions of the transverse and longitudinal steel bars are achieved within the minimum joint width; by arranging edge-sealing steel plates at the transverse and longitudinal joints of the sandwich insulation prefabricated shear wall, the traditional method of erecting scaffolding and supporting formwork is broken through, avoiding the impact and interference on the construction activities around the wall. During the construction of the concrete wall, installation and other operations in the surrounding space can be carried out normally, realizing parallel construction and greatly improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 This is the overall structural diagram of the vertical prefabricated shear wall wet joint structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle circle;

[0028] Figure 3 For the present invention Figure 1 Cross-sectional structure diagram at AA in the middle;

[0029] Figure 4 This is the overall structural diagram of the transverse prefabricated shear wall wet joint structure of the present invention.

[0030] In the figure: 1. Inner wall panel; 2. Outer wall panel; 3. Insulation layer; 4. First edge-sealing steel plate; 5. Second edge-sealing steel plate; 6. First pre-embedded bent steel plate; 7. First pre-embedded straight steel plate; 8. Second pre-embedded bent steel plate; 9. Second pre-embedded straight steel plate; 10. UHPC concrete; 11. Anchoring bars; 12. Third edge-sealing steel plate; 13. Longitudinal reinforcing rib plate. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0033] This embodiment discloses a sandwich insulation prefabricated shear wall wet joint structure, such as Figure 1-Figure 4 As shown, it includes: multiple sections of prefabricated shear walls, and a wet joint structure is arranged between adjacent prefabricated shear walls; each section of the prefabricated shear wall is composed of an inner wall panel 1 and an outer wall panel 2; an insulation layer 3 is arranged between the inner wall panel 1 and the outer wall panel 2, a first embedded steel plate is arranged at the end of the inner wall panel 1, and a second embedded steel plate is arranged at the end of the outer wall panel 2, transverse steel bars and longitudinal steel bars are arranged in the inner wall panel 1 and the outer wall panel 2, and UHPC concrete 10 is poured; the transverse steel bars and the longitudinal steel bars form a steel cage structure;

[0034] A longitudinal reinforcing rib plate 13 is arranged between the first embedded steel plates of adjacent sections, a longitudinal reinforcing rib plate 13 is arranged between the second embedded steel plates of adjacent sections, a first edge-sealing steel plate 4 is arranged on the side between the inner wall panels 1 of adjacent sections; a second edge-sealing steel plate 5 is arranged on the side between the outer wall panels 2 of adjacent sections; the first edge-sealing steel plate 4 is fixedly connected to the first embedded steel plates of two adjacent sections, and the second edge-sealing steel plate 5 is fixedly connected to the second embedded steel plates of two adjacent sections.

[0035] A plurality of anchoring bars 11 are provided on a side of the first embedded steel plate close to the inner wall panel 1 , and a plurality of anchoring bars 11 are also provided on a side of the second embedded steel plate close to the outer wall panel 2 .

[0036] The first embedded steel plate includes a first embedded bent steel plate 6 and a first embedded straight steel plate 7 . The embedded bent steel plate is arranged at one end of the inner wall panel 1 , and the embedded straight steel plate is arranged at the other end of the inner wall panel 1 .

[0037] The second pre-embedded steel plate includes a second pre-embedded bent steel plate 8 and a second pre-embedded straight steel plate 9 . The second pre-embedded bent steel plate 8 is arranged at one end of the exterior wall panel 2 , and the second pre-embedded straight steel plate 9 is arranged at the other end of the exterior wall panel 2 .

[0038] The first pre-embedded bent steel plate 6 and the first pre-embedded straight steel plate 7 are arranged in adjacent sections, and the first pre-embedded bent steel plate 6 and the first pre-embedded straight steel plate 7 in adjacent sections are connected as one through the first edge-sealing steel plate 4 on the side of the inner wall panel 1 .

[0039] The second pre-embedded bent steel plate 8 and the second pre-embedded straight steel plate 9 are arranged in adjacent sections, and the second pre-embedded bent steel plate 8 and the second pre-embedded straight steel plate 9 in adjacent sections are connected as one through the second edge-sealing steel plate 5 on the side of the exterior wall panel 2 .

[0040] A plurality of the first pre-embedded bent steel plates 6 or the first pre-embedded straight steel plates 7 are evenly arranged at the end of each of the inner wall panels 1; a plurality of the longitudinal reinforcing rib plates 13 are arranged between the first pre-embedded bent steel plates 6 and the first pre-embedded straight steel plates 7, and are respectively fixedly connected to the first pre-embedded bent steel plates 6 and the first pre-embedded straight steel plates 7 of adjacent sections.

[0041] A plurality of the second pre-embedded bent steel plates 8 or the second pre-embedded straight steel plates 9 are evenly arranged at the end of each of the exterior wall panels 2; a plurality of the longitudinal reinforcing rib plates 13 are arranged between the second pre-embedded bent steel plates 8 and the second pre-embedded straight steel plates 9, and are respectively fixedly connected to the second pre-embedded bent steel plates 8 and the second pre-embedded straight steel plates 9 of adjacent sections.

[0042] The prefabricated shear wall comprises a vertical prefabricated shear wall and a horizontal prefabricated shear wall; a third edge-sealed steel plate 12 is also provided at the lowest end of the vertical prefabricated shear wall for fixed connection with the ground.

[0043] The present invention also provides a construction method of a sandwich insulation prefabricated shear wall wet joint structure, comprising the following steps:

[0044] S1. Arrange vertical steel bars and transverse steel bars in the inner wall panel 1 and the outer wall panel 2 in advance; the vertical steel bars extend out of the inner wall panel 1 and the outer wall panel 2 by a set distance; a third embedded steel plate is set at the bottom of the vertical prefabricated shear wall, and no third embedded steel plate is required for the horizontal prefabricated concrete shear wall;

[0045] S2. On the basis of S1, fix the prefabricated shear wall to the ground, and weld the third embedded steel plate to the anchoring steel plate on the ground. This step is not necessary for the horizontal prefabricated shear wall.

[0046] S3, splicing the adjacent sections of the prefabricated shear walls according to the set spacing, the vertical steel bars extending out of the set length of the end of the prefabricated shear wall, and inserted into the end of the adjacent section of the prefabricated shear wall; welding the first embedded bent steel plate 6 and the first embedded straight steel plate 7 of the adjacent section with the first edge-sealing steel plate 4; welding the second embedded bent steel plate 8 and the second embedded straight steel plate 9 of the adjacent section with the second edge-sealing steel plate 5;

[0047] S4. Casting UHPC concrete 10 in the joint area and curing the UHPC concrete 10 to a specified strength.

[0048] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A sandwich insulation prefabricated shear wall wet joint structure, characterized in that: include: Multiple sections of prefabricated shear walls, with wet joint structures between adjacent prefabricated shear walls; each section of the prefabricated shear wall is composed of an inner wall panel and an outer wall panel; an insulation layer is provided between the inner wall panel and the outer wall panel, a first embedded steel plate is provided at the end of the inner wall panel, and a second embedded steel plate is provided at the end of the outer wall panel; transverse steel bars and longitudinal steel bars are provided in the inner wall panel and the outer wall panel, and concrete is poured; the transverse steel bars and longitudinal steel bars form a steel cage structure; Longitudinal reinforcing ribs are arranged between the first embedded steel plates of adjacent sections, longitudinal reinforcing ribs are arranged between the second embedded steel plates of adjacent sections, first edge-sealing steel plates are arranged on the sides between the inner wall plates of adjacent sections; second edge-sealing steel plates are arranged on the sides between the outer wall plates of adjacent sections; the first edge-sealing steel plate is fixedly connected to the first embedded steel plates of two adjacent sections, and the second edge-sealing steel plate is fixedly connected to the second embedded steel plates of two adjacent sections.

2. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 1, characterized in that: A plurality of anchoring bars are arranged on a side of the first embedded steel plate close to the inner wall plate, and a plurality of anchoring bars are also arranged on a side of the second embedded steel plate close to the outer wall plate.

3. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 1, characterized in that: The first embedded steel plate includes a first embedded bent steel plate and a first embedded straight steel plate. The embedded bent steel plate is arranged at one end of the inner wall plate, and the embedded straight steel plate is arranged at the other end of the inner wall plate.

4. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 1, characterized in that: The second pre-embedded steel plate includes a second pre-embedded bent steel plate and a second pre-embedded straight steel plate, the second pre-embedded bent steel plate is arranged at one end of the exterior wall panel, and the second pre-embedded straight steel plate is arranged at the other end of the exterior wall panel.

5. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 3, characterized in that: The first pre-embedded bent steel plate and the first pre-embedded straight steel plate are arranged in adjacent sections, and the first pre-embedded bent steel plate and the first pre-embedded straight steel plate in adjacent sections are connected as one through the first edge-sealing steel plate on the side of the inner wall panel.

6. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 4, characterized in that: The second pre-embedded bent steel plate and the second pre-embedded straight steel plate are arranged in adjacent sections, and the second pre-embedded bent steel plate and the second pre-embedded straight steel plate in adjacent sections are connected as one through the second edge-sealing steel plate on the side of the exterior wall panel.

7. A sandwich insulation prefabricated shear wall wet joint structure as claimed in claim 5, characterized in that: A plurality of the first pre-embedded bent steel plates or the first pre-embedded straight steel plates are evenly arranged at the end of each of the inner wall panels; a plurality of the longitudinal reinforcing rib plates are arranged between the first pre-embedded bent steel plates and the first pre-embedded straight steel plates, and are respectively fixedly connected to the first pre-embedded bent steel plates and the first pre-embedded straight steel plates of adjacent sections.

8. The sandwich insulation prefabricated shear wall wet joint structure according to claim 6, characterized in that: A plurality of the second pre-embedded bent steel plates or second pre-embedded straight steel plates are evenly arranged at the end of each of the exterior wall panels; A plurality of longitudinal reinforcing ribs are provided between the second pre-embedded bent steel plates and the second pre-embedded straight steel plates, and are respectively fixedly connected to the second pre-embedded bent steel plates and the second pre-embedded straight steel plates of adjacent sections.

9. The sandwich insulation prefabricated shear wall wet joint structure according to claim 1, characterized in that: The prefabricated shear wall comprises a vertical prefabricated shear wall and a horizontal prefabricated shear wall; a third edge-sealing steel plate is also provided at the lowest end of the vertical prefabricated concrete shear wall for fixed connection with the ground.

10. A construction method for a sandwich insulation prefabricated shear wall wet joint structure as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1. Arrange vertical steel bars and transverse steel bars in the inner wall panels and outer wall panels in advance; the vertical steel bars extend out of the inner wall panels and the outer wall panels by a set distance; a third embedded steel plate is set at the bottom of the vertical prefabricated shear wall, and no third embedded steel plate is required for the horizontal prefabricated shear wall; S2. On the basis of S1, fix the prefabricated shear wall to the ground, and weld the third embedded steel plate to the anchoring steel plate on the ground. This step is not necessary for the horizontal prefabricated shear wall. S3, splicing the adjacent sections of the prefabricated shear walls according to the set spacing, the vertical steel bars extending out of the set length of the end of the prefabricated shear wall, and inserting into the end of the adjacent section of the prefabricated shear wall; welding the first embedded bent steel plate and the first embedded straight steel plate of the adjacent section with the first edge-sealing steel plate; welding the second embedded bent steel plate and the second embedded straight steel plate of the adjacent section with the second edge-sealing steel plate; S4. Pour UHPC concrete in the joint area and cure the UHPC concrete to the specified strength.

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