Prefabricated double-sided composite parapet and installation method thereof

Abstract

The present invention discloses an assembled prefabricated double-sided composite parapet, comprising an inner prefabricated concrete wall panel and an outer prefabricated concrete wall panel that are relatively spaced apart, and the two are connected to form a prefabricated wall panel assembly through truss steel bars. The prefabricated wall panel assembly has a cavity, and concrete is poured in the cavity at the construction site to form a prefabricated double-sided composite wall panel that is subjected to overall force. The wall panels of the present invention are prefabricated in a factory and assembled on site, which can avoid the need to set up a cantilevered protective frame and formwork reinforcement at the construction site, reduce construction safety risks, and make construction convenient and efficient, saving costs. Before the production of the wall panels, the parapet drawings are further designed to reduce the types of component production, improve the standardization of prefabricated components, and realize mass production of components. During the in-depth design, the connection node design and the positioning of various embedded parts can be fully considered, and various embedded parts are embedded during on-site production. After the components enter the site, they can be directly hoisted, eliminating on-site formwork reinforcement, saving the transportation and consumption of circulating materials, and reducing construction waste.

Description

Technical Field

[0001] The present invention belongs to the field of construction, and in particular relates to an assembled prefabricated double-sided composite parapet and an installation method thereof. Background Art

[0002] Buildings with a core tube + steel external frame structure typically utilize external framing during steel external frame construction. External parapet construction requires the installation of separate cantilevered protective frames and on-site formwork reinforcement before construction can begin. However, this installation and reinforcement not only requires significant manpower and resources, impacting on-site construction progress, but also presents significant safety risks during the installation and removal of the cantilevered protective frames. Summary of the Invention

[0003] The purpose of the present invention is to provide an assembled prefabricated double-sided overlapping parapet and its installation method, which can eliminate the need for setting up a cantilevered protective operating frame and on-site formwork reinforcement measures, greatly reducing construction safety risks, making construction convenient and efficient, and saving costs.

[0004] The present invention is implemented as follows: an assembled prefabricated double-sided composite parapet includes an inner prefabricated concrete wall panel and an outer prefabricated concrete wall panel, wherein the inner prefabricated concrete wall panel and the outer prefabricated concrete wall panel are relatively spaced apart and connected to form a prefabricated wall panel assembly by truss steel bars; a cavity is formed between the inner prefabricated concrete wall panel and the outer prefabricated concrete wall panel, and an integrally stressed prefabricated double-sided composite wall panel is formed by pouring concrete on site in the formed cavity.

[0005] Furthermore, the inner precast concrete wall panels are provided with inner longitudinal reinforcements and inner horizontal reinforcements, and the outer precast concrete wall panels are provided with outer longitudinal reinforcements and outer horizontal reinforcements; wherein the inner horizontal reinforcements and the outer horizontal reinforcements are fixedly connected by truss steel bars.

[0006] Furthermore, the truss reinforcement includes an upper chord reinforcement, a lower chord reinforcement and a web reinforcement, wherein the upper chord reinforcement is embedded in the inner precast concrete wall panel, the lower chord reinforcement is embedded in the outer precast concrete wall panel, and the upper chord reinforcement and the lower chord reinforcement are fixedly connected by the web reinforcement.

[0007] Furthermore, two adjacent prefabricated wall panel assemblies are connected by using cast-in-situ concrete structural columns, and the cast-in-situ concrete structural columns are internally provided with structural column longitudinal reinforcement, joint horizontal reinforcement and structural column stirrups.

[0008] Furthermore, the prefabricated double-sided composite wall panel is embedded with a lifting ring for on-site lifting.

[0009] Furthermore, curtain wall embedded parts are embedded in the prefabricated double-sided composite wall panels.

[0010] Furthermore, bolt sleeves for connecting temporary supports are embedded inside the prefabricated double-sided composite wall panels.

[0011] In order to achieve the above-mentioned object of the invention, the present invention also provides a method for installing an assembled prefabricated double-sided composite parapet, comprising the following steps:

[0012] S1. Conduct in-depth design based on the construction drawings, clarify the layout, size, component type and reinforcement of the prefabricated double-sided composite wall panels, and locate embedded parts;

[0013] S2. Factory processing and production

[0014] According to the detailed design drawings, various types of wall panels are produced, component information QR codes are affixed, and the panels are maintained before leaving the factory;

[0015] S3. On-site hoisting implementation

[0016] S31. Determine the installation position of prefabricated double-sided composite wall panels

[0017] According to the design drawings, place the relevant axes, wall edges, control lines, etc. on the floor board and clean the foundation surface;

[0018] Review and adjust the position and length of the reserved dowel bars in the inner cavity of prefabricated wall panels;

[0019] S32. Measure and place horizontal elevation control pads

[0020] A certain gap is left at the bottom of the prefabricated double-sided composite wall panels. Special pads are used to adjust the elevation and level the prefabricated double-sided composite wall panels. Special pads are placed at the bottom of the inner and outer prefabricated concrete wall panels of each prefabricated double-sided composite wall panel and measured with a level to ensure that they are at the same horizontal elevation.

[0021] S33. Wall panels hoisted into place

[0022] Prefabricated double-sided composite wall panels should be hoisted according to the installation drawings and pre-established installation sequence. They should be hoisted vertically and smoothly. When hoisting the wall panels, buffer blocks should be used to protect the lower edge corners of the prefabricated double-sided composite wall panels from damage. After hoisting, the prefabricated double-sided composite wall panels should be carefully and slowly placed on the gaskets, and the installation position should be adjusted first, followed by the horizontality and verticality.

[0023] S34. Install and fix wall panel supports

[0024] Each prefabricated double-sided composite wall panel requires two sets of diagonal braces to secure it. The diagonal braces are connected to the bolt sleeves reserved for the prefabricated double-sided composite wall panel using special bolts. The bottom of the diagonal brace is connected and fixed to the pre-buried pull ring embedded in the ground. During the installation process, the operator must ensure that both sets of diagonal braces are firmly installed before removing the tower crane hook. The verticality is adjusted by adjusting the threaded sleeves on the two diagonal braces, and both sides must be adjusted simultaneously.

[0025] S35. Tie the external wall structural column reinforcement and additional reinforcement

[0026] After the installation of the prefabricated double-sided composite wall panels is completed, the reinforcement workers will tie the reinforcement of the cast-in-place concrete structural columns of the exterior wall and install the additional connecting reinforcement of the structure;

[0027] S36. Bottom and joint treatment of prefabricated double-sided composite wall panels

[0028] Lay dry hard mortar between the prefabricated double-sided composite wall panels and the ground for leveling and gap sealing to prevent leakage;

[0029] S37. Parapet wall structural column formwork installation and reinforcement

[0030] The structural column formwork between adjacent prefabricated double-sided composite wall panels is installed using plastic formwork and reinforced with wooden back ribs;

[0031] S38. Concrete pouring and curing

[0032] After the prefabricated double-sided composite wall panels are installed and inspected and accepted, the concrete of the inner cavity and structural columns of the prefabricated double-sided composite wall panels can be poured and cured for a period of time.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention adopts an assembled prefabricated double-sided overlapping parapet. The wall panel components are prefabricated in the factory and assembled on site, which can eliminate the need to set up a cantilevered protective operating frame at the construction site, reduce construction safety risks, make construction convenient and efficient, and save costs. Before factory processing and production, the parapet can be further designed to reduce the types of component production, improve the standardization of prefabricated components, and achieve standardized design of components to realize mass production of components. When deepening the design, the design of the connection nodes of the prefabricated parapet and the positioning of various embedded parts can be fully considered. All kinds of embedded parts are embedded during factory processing and production, and can be directly hoisted after the components arrive on site, eliminating the need for on-site formwork reinforcement, saving the transportation and consumption of turnover materials, reducing construction waste, and keeping the construction site clean and orderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a front view of an assembled prefabricated double-sided composite parapet provided in this embodiment;

[0036] Figure 2This is a side view of an assembled prefabricated double-sided composite parapet provided in this embodiment;

[0037] Figure 3 This is a top view of an assembled prefabricated double-sided composite parapet provided in this embodiment;

[0038] Figure 4 This is a schematic diagram of each prefabricated double-sided composite wall panel provided in this embodiment being fixed by two sets of diagonal braces;

[0039] Figure 5 This is a schematic diagram of the template installation and reinforcement of the structural column between two adjacent prefabricated double-sided composite wall panels provided in this embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a communication between the internal parts of the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Reference Figures 1 to 3 , shows an assembled prefabricated double-sided composite parapet provided by this embodiment, comprising an inner precast concrete wall panel 1 and an outer precast concrete wall panel 2. The inner and outer precast concrete wall panels 1 and 2 are spaced relative to each other and connected to form a precast wall panel assembly via truss reinforcement 3. A cavity is formed between the inner and outer precast concrete wall panels 1 and 2, and concrete is poured on-site in this cavity to form the integrally loaded precast double-sided composite wall panel.

[0043] Specifically, inner longitudinal reinforcement 11 and inner horizontal reinforcement 12 are arranged in the inner precast concrete wall panel 1, and outer longitudinal reinforcement 21 and outer horizontal reinforcement 22 are arranged in the outer precast concrete wall panel 2; wherein, the inner horizontal reinforcement 12 and the outer horizontal reinforcement 22 are fixedly connected by the truss steel bar 4.

[0044] The truss reinforcement 3 includes an upper chord reinforcement 31, a lower chord reinforcement 32 and a web reinforcement 33, wherein the upper chord reinforcement 31 is embedded in the inner precast concrete wall panel 1, and the lower chord reinforcement 32 is embedded in the outer precast concrete wall panel 2. The upper chord reinforcement 31 and the lower chord reinforcement 32 are fixedly connected by the web reinforcement 33.

[0045] Two adjacent prefabricated wall panel components are connected by cast-in-place concrete structural columns, and the cast-in-place concrete structural columns are equipped with structural column longitudinal reinforcement, joint horizontal reinforcement and structural column stirrups.

[0046] Furthermore, the interior of the prefabricated double-sided composite wall panel is also embedded with required embedded parts such as lifting rings 5 ​​for on-site lifting, curtain wall embedded parts 6, bolt sleeves 7 for connecting temporary supports, and overflow pipes.

[0047] This embodiment also provides a method for installing the prefabricated double-sided composite parapet, which includes the following steps:

[0048] 1. Make in-depth design according to the construction drawings to clarify the plane layout, size, component type and reinforcement of prefabricated double-sided composite wall panels, and the positioning of embedded parts.

[0049] 2. Factory processing and production: According to the detailed design drawings, various types of wall panels are produced, component information QR codes are affixed, and the panels are maintained before leaving the factory.

[0050] 3. On-site hoisting implementation

[0051] (1) Determination of the installation position of prefabricated double-sided composite wall panels

[0052] According to the design drawings, place the relevant axes, wall edges, control lines, etc. on the floor panel and clean the foundation surface.

[0053] Review and adjust the position and length of the reserved dowel bars in the inner cavity of the prefabricated wall panels.

[0054] (2) Measure and place the horizontal elevation control pads

[0055] A 20mm gap is left at the bottom of the prefabricated double-sided composite wall panels, and special spacers are used to adjust the elevation and level the prefabricated wall panels. Special spacers are placed at the bottom of the inner precast concrete wall panel 1 and the outer precast concrete wall panel 2 of each prefabricated double-sided composite wall panel, and a level is used to measure them to ensure they are at the same level.

[0056] (3) Prefabricated double-sided composite wall panels are hoisted into place

[0057] Prefabricated double-sided composite wall panels should be hoisted according to the installation drawings and the pre-arranged installation sequence; the hoisting should be vertical and stable, the angle between the hoisting rope and the horizontal plane should not be less than 60°, and the hook should use a spring to prevent the hook from opening; when lifting the wall panels, the lower edge corners of the wall panels should be protected from damage by using buffer blocks (rubber pads, wooden squares, etc.); after lifting, the prefabricated double-sided composite wall panels should be carefully and slowly placed on the gaskets, and the installation position should be adjusted first, and then the horizontality and verticality should be adjusted.

[0058] (4) Install and fix the wall panel support 8

[0059] Reference Figure 4 Each prefabricated double-sided composite wall panel requires two sets of diagonal braces 8 to fix it. The diagonal braces 8 are connected to the bolt sleeves 7 reserved for the wall panel through special bolts a, and the bottom of the diagonal braces 8 is connected and fixed to the embedded parts b embedded in the ground; during the installation process, the operator must ensure that the two sets of diagonal braces 8 are firmly installed before removing the tower crane hook; the verticality is adjusted by adjusting the threaded sleeves c on the two diagonal braces 8, and both sides must be adjusted at the same time.

[0060] (5) Tie the external wall structural column reinforcement and additional reinforcement

[0061] After the installation of the prefabricated double-sided composite wall panels is completed, the reinforcement workers will tie the reinforcement of the cast-in-place structural columns of the exterior wall and install the additional connecting reinforcement of the structure.

[0062] (6) Bottom and joint treatment of prefabricated double-sided composite wall panels

[0063] Dry hard mortar is laid between the prefabricated double-sided composite wall panels and the ground for leveling and gap sealing to prevent leakage.

[0064] (7) Installation and reinforcement of structural column formwork of parapet

[0065] Reference Figure 5 The formwork of the structural columns between two adjacent prefabricated double-sided composite wall panels adopts plastic formwork d, and the main reinforcement measure adopts wooden back rib e reinforcement (the formwork reinforcement of all structural columns is divided into two upper and lower lines along the height direction of the prefabricated double-sided composite wall panels and is evenly distributed).

[0066] (8) Concrete pouring and curing

[0067] After the prefabricated double-sided composite wall panels are installed and inspected and accepted, the concrete of the inner cavity and structural columns of the prefabricated double-sided composite wall panels can be poured and cured for 14 days.

[0068] In summary, the present embodiment adopts an assembled prefabricated double-sided overlapping parapet, and the wall panel components are prefabricated in the factory and assembled on site, which can eliminate the need to set up cantilevered protective frames and on-site formwork reinforcement at the construction site, reduce construction safety risks, make construction convenient and efficient, and save costs. Before factory processing and production, the parapet drawings can be further designed to reduce the types of component production, improve the standardization of prefabricated components, and achieve standardized design of components to realize mass production of components. When deepening the design of the drawings, the design of the prefabricated parapet connection nodes and the positioning of various embedded parts can be fully considered, such as: curtain wall embedded parts 6, bolt sleeves 7, overflow pipes, etc. All kinds of embedded parts are embedded in the factory during processing and production, and can be directly hoisted after the components arrive on site, eliminating the need for on-site formwork reinforcement, saving the transportation and consumption of turnover materials, reducing construction waste, and keeping the construction site clean and orderly.

[0069] 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 and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled prefabricated double-sided composite parapet, characterized in that: It comprises an inner precast concrete wall panel and an outer precast concrete wall panel, which are arranged relatively spaced apart and connected into a precast wall panel assembly through truss steel bars; a cavity is formed between the inner precast concrete wall panel and the outer precast concrete wall panel, and a precast double-sided composite wall panel that is subjected to overall stress is formed by pouring concrete on site in the formed cavity.

2. The assembled prefabricated double-sided composite parapet according to claim 1, characterized in that: The inner precast concrete wall panels are provided with inner longitudinal reinforcements and inner horizontal reinforcements, and the outer precast concrete wall panels are provided with outer longitudinal reinforcements and outer horizontal reinforcements; wherein the inner horizontal reinforcements and the outer horizontal reinforcements are fixedly connected by truss steel bars.

3. The assembled prefabricated double-sided composite parapet according to claim 1, characterized in that: The truss reinforcement includes an upper chord reinforcement, a lower chord reinforcement and a web reinforcement, wherein the upper chord reinforcement is embedded in the inner precast concrete wall panel, the lower chord reinforcement is embedded in the outer precast concrete wall panel, and the upper chord reinforcement and the lower chord reinforcement are fixedly connected by the web reinforcement.

4. The assembled prefabricated double-sided composite parapet according to any one of claims 1 to 3, characterized in that: Two adjacent prefabricated wall panel assemblies are connected by using cast-in-place concrete structural columns, and the cast-in-place concrete structural columns are internally provided with structural column longitudinal reinforcement, joint horizontal reinforcement and structural column stirrups.

5. The assembled prefabricated double-sided composite parapet according to claim 4, characterized in that: The prefabricated double-sided composite wall panel is also embedded with a lifting ring for on-site lifting.

6. The assembled prefabricated double-sided composite parapet according to claim 4, characterized in that: Curtain wall embedded parts are also embedded inside the prefabricated double-sided composite wall panel.

7. The assembled prefabricated double-sided composite parapet according to claim 4, characterized in that: Bolt sleeves for connecting temporary supports are also embedded inside the prefabricated double-sided composite wall panel.

8. A method for installing an assembled prefabricated double-sided composite parapet according to claim 7, characterized in that: The following steps are involved: S1. Make in-depth design according to the construction drawings, clarify the plane layout, size, component type and reinforcement of the prefabricated double-sided composite wall panels, and locate the embedded parts; S2. Factory processing and production According to the detailed design drawings, various types of wall panels are produced, component information QR codes are affixed, and maintenance is performed before leaving the factory; S3. On-site lifting implementation S31. Determination of installation position of prefabricated double-sided composite wall panels According to the design drawings, place the relevant axes, wall edges, control lines, etc. on the floor board and clean the foundation surface; Review and adjust the position and length of the reserved dowel bars in the inner cavity of the prefabricated wall panels; S32. Measure and place horizontal elevation control pads A certain gap is left at the bottom of the prefabricated double-sided composite wall panel. Special pads are used to adjust the elevation and level the prefabricated double-sided composite wall panel. Special pads are placed at the bottom of the inner prefabricated concrete wall panel and the outer prefabricated concrete wall panel of each prefabricated double-sided composite wall panel, and measured with a level to make them at the same horizontal elevation; S33. Wall panels hoisted into place The prefabricated double-sided composite wall panels should be hoisted according to the installation drawings and the pre-established installation sequence; the hoisting should be vertical and stable. When hoisting the wall panels, the lower edge corners of the prefabricated double-sided composite wall panels should be protected from damage by using buffer blocks; after hoisting, the prefabricated double-sided composite wall panels should be carefully and slowly placed on the gaskets, and the installation position should be adjusted first, and then the horizontality and verticality should be adjusted; S34. Install and fix the wall panel support Each prefabricated double-sided composite wall panel requires two sets of diagonal braces to fix it. The diagonal braces are connected to the bolt sleeves reserved for the prefabricated double-sided composite wall panels through special bolts, and the bottom of the diagonal braces is connected and fixed to the pre-buried pull rings embedded in the ground. During the installation process, the operators must ensure that the two sets of diagonal braces are firmly installed before they can remove the tower crane hook. The verticality is adjusted by adjusting the threaded sleeves on the two diagonal braces, and both sides must be adjusted at the same time. S35. Binding of external wall structural column reinforcement and additional reinforcement After the installation of the prefabricated double-sided composite wall panels is completed, the reinforcement workers will tie the reinforcement of the cast-in-place concrete structural columns of the exterior walls and install the additional connecting reinforcement of the structure; S36. Bottom and joint treatment of prefabricated double-sided composite wall panels Lay dry hard mortar between the prefabricated double-sided composite wall panels and the ground for leveling and gap sealing to prevent leakage; S37. Installation and reinforcement of parapet wall structural column formwork The structural column formwork between adjacent prefabricated double-sided composite wall panels is installed with plastic formwork and reinforced with wooden back ribs; S38. Concrete pouring and curing After the prefabricated double-sided composite wall panels are installed and inspected and accepted, the concrete of the inner cavity and structural columns of the prefabricated double-sided composite wall panels can be poured and cured for a period of time.

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