A double-sided prefabricated sandwich composite wallboard and a construction method thereof

Abstract

The present application relates to a kind of double-sided prefabricated sandwich composite wallboard and its construction method, comprising: prefabricated wallboard body, the prefabricated wallboard body top is equipped with horizontal connecting piece and vertical connecting piece;Construction method includes the following steps: lower layer prefabricated wallboard body is connected on prefabricated beam by horizontal connecting piece;With cast-in-place floor layer, the bottom end of upper layer prefabricated wallboard body is connected by vertical connecting piece;The gap between upper layer prefabricated wallboard body, lower layer prefabricated wallboard body and cast-in-place floor layer is sealed outside waterproof construction.The double-sided prefabricated sandwich composite wallboard and its construction method provided by the present application, by optimizing connecting structure, realize the stable connection of prefabricated wallboard and cast-in-place structure, improve the safety and stability of overall structure;Adopt secondary installation mode, simplify construction process, shorten construction period, improve construction efficiency;By reducing construction difficulty and shortening construction period, reduce the construction cost, improve economic benefit.

Description

Technical Field

[0001] This invention relates to the field of precast wall panel technology, and in particular to a double-sided precast sandwich composite wall panel and its construction method. Background Technology

[0002] With the development of industrialized construction, prefabricated assembled buildings have become an industry trend. However, the existing precast wall panel connection method of casting first and then hanging has several problems, such as insufficient connection strength, long construction period, and unstable thermal insulation effect. Especially in the construction method of casting first and then hanging, how to ensure a stable connection between the precast wall panel and the cast-in-place structure, while achieving good thermal insulation performance, has become an urgent problem to be solved.

[0003] Existing technologies for connecting precast wall panels often employ welding, bolting, or other methods. While these methods can achieve the connection, they are complex to implement and can easily lead to stress concentration at the connection points, affecting the safety of the structure. Summary of the Invention

[0004] To solve the above problems, the technical solution adopted by the present invention is: a double-sided prefabricated sandwich composite wall panel and its construction method, comprising: a prefabricated wall panel body, wherein the prefabricated wall panel body is composed of prefabricated layers on both sides and an insulation layer disposed between the prefabricated layers on both sides, and the top of the prefabricated wall panel body is provided with a horizontal connector and a vertical connector;

[0005] The construction method includes the following steps:

[0006] The lower precast wall panel body is connected to the precast beam via transverse connectors;

[0007] The lower part of the vertical connector is connected to the top of the lower precast wall panel body, and the upper part passes through the cast-in-place floor layer and is connected to the bottom of the cast-in-place floor layer and the upper precast wall panel body.

[0008] Waterproofing and sealing construction of the outer side of the gap between the upper precast wall panel body, the lower precast wall panel body and the cast-in-place floor surface.

[0009] A further improvement is made to include a transverse connecting member comprising a transverse screw and a transverse embedded part. The transverse embedded part is embedded in the precast beam. The transverse screw passes through a pre-drilled hole at the top of the precast wall panel body and is connected to the transverse embedded part. The outer end of the transverse screw is fixed by a nut.

[0010] A further improvement involves injecting high-strength grout into the recess on the outer surface of the precast wall panel body where the nut is housed, and sealing it with mesh fabric.

[0011] A further improvement is made in that the vertical connector includes a vertical screw and a vertical embedded part. The vertical embedded part is embedded in the top of the precast wall panel body. The bottom end of the vertical screw is connected to the vertical embedded part. The top end of the vertical screw passes through the reserved hole on the cast-in-place floor layer and is inserted into the connection hole at the bottom of the upper precast wall panel body.

[0012] A further improvement is made by filling the reserved holes on the cast-in-place floor slab with grout to connect the vertical screw to the cast-in-place floor slab.

[0013] A further improvement is that the gaps between the top of the precast wall panel body and the precast beam, as well as the gaps between the cast-in-place floor slab and the ground, are all equipped with sealing elements.

[0014] A further improvement is that the bottom end of the precast wall panel body of the upper layer is inserted into the vertical screw through the connecting hole, and grout is injected into the connecting hole through the grouting port communicating with the connecting hole.

[0015] A further improvement is that sealing elements are provided on both the inner and outer sides of the gap between the precast wall panel body and the cast-in-place floor layer.

[0016] A further improvement is that the top of the prefabricated wall panel body is provided with a tongue and groove joint that is lower on the outside and higher on the inside.

[0017] A further improvement is made to provide a tongue-and-groove joint with a lower outer edge and a higher inner edge at the connection between the cast-in-place floor slab and the precast wall panel body on the upper layer, and to carry out secondary construction of the cast-in-place floor slab.

[0018] The beneficial effects of this invention are:

[0019] The double-sided precast sandwich composite wall panel and its construction method provided by this invention achieve a stable connection between the precast wall panel and the cast-in-place structure by optimizing the connection structure, thereby improving the safety and stability of the overall structure; the secondary installation method simplifies the construction process, shortens the construction cycle, and improves construction efficiency; by reducing construction difficulty and shortening the construction cycle, construction costs are reduced and economic benefits are improved. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the double-sided prefabricated sandwich composite wall panel structure of the present invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] like Figure 1 As shown, the present invention provides a double-sided prefabricated sandwich composite wall panel and its construction method, including: a prefabricated wall panel body 1, the prefabricated wall panel body 1 being composed of prefabricated layers on both sides and an insulation layer disposed between the prefabricated layers on both sides, and a horizontal connector 2 and a vertical connector 3 being provided on the top of the prefabricated wall panel body;

[0027] The construction method includes the following steps:

[0028] The lower precast wall panel body 1 is connected to the precast beam 100 via a transverse connector 2;

[0029] The lower part of the vertical connector 3 is connected to the top of the lower precast wall panel body 1, and the upper part passes through the cast-in-place floor slab 200 and is connected to the bottom of the cast-in-place floor slab 200 and the upper precast wall panel body 1.

[0030] Waterproofing and sealing construction of the outer side of the gap between the upper precast wall panel body, the lower precast wall panel body and the cast-in-place floor surface.

[0031] The double-sided precast sandwich composite wall panel and its construction method provided by this invention achieve a stable connection between the precast wall panel and the cast-in-place structure by optimizing the connection structure, thereby improving the safety and stability of the overall structure; the secondary installation method simplifies the construction process, shortens the construction cycle, and improves construction efficiency; by reducing construction difficulty and shortening the construction cycle, construction costs are reduced and economic benefits are improved.

[0032] A further improvement is made to the transverse connector 2, which includes a transverse screw and a transverse embedded part. The transverse embedded part is pre-embedded on the wall panel side of the precast beam 100 during the precasting of the precast beam. The transverse screw passes through a pre-drilled hole at the top of the precast wall panel body 1 and is fixedly connected to the transverse embedded part. The outer end of the transverse screw is fixed by a nut, thereby realizing the fixed connection between the lower precast wall panel body and the precast beam.

[0033] To ensure a smooth outer surface of the precast wall panel body, a further improvement to this technical solution is that a recess 11 for accommodating nuts is provided at the reserved hole on the outer surface of the precast wall panel body 1. After the transverse screw is connected and fixed, high-strength grout is injected into the recess 11 for accommodating nuts, and then sealed by mesh cloth, so that the outer surface of the precast wall panel body is smooth and waterproof.

[0034] After the lower precast wall panel body is fixedly installed, the upper precast wall panel body is installed. A further improvement of this technical solution is that the vertical connector 3 includes a vertical screw 31 and a vertical embedded part 32. The vertical embedded part 32 is pre-embedded in the top of the precast wall panel body 1 during the manufacturing process. The bottom end of the vertical screw 31 is connected to the vertical embedded part 32. The top end of the vertical screw 31 passes through the vertical reserved hole 210 on the cast-in-place floor layer 200 and is inserted into the connecting hole 12 at the bottom of the upper precast wall panel body and fixed. The fixing method is mainly by injecting high-strength grout.

[0035] A further improvement involves filling the pre-drilled holes 210 on the cast-in-place floor slab with grout to connect the vertical screw to the cast-in-place floor slab. Before grouting, the gaps between the lower precast wall panel and the cast-in-place floor slab and precast beams must be sealed; otherwise, grout will leak out from the gaps during grouting.

[0036] A further improvement is made by providing sealing elements 4 for the gaps between the top of the lower precast wall panel and the precast beam, as well as the gaps between the precast floor and the ground surface. Specifically, a sealing element is installed at the gap between the inner side of the top of the lower precast wall panel and the precast beam; this sealing element is preferably an extruded rubber rod. The outer side of the vertical screw of the gap between the top of the lower precast wall panel and the precast floor is sealed by a corresponding sealing element. At the same time, a layer of sealant 5 is applied to the outside of the sealing element at this location to improve the waterproofing of the joint.

[0037] A further improvement is made in that the bottom end of the upper precast wall panel body is inserted into the vertical screw through a connecting hole. The inner side wall of the bottom end of the precast wall panel body is provided with a grouting port and a grout outlet (the grout outlet is above the grouting port) that connect to the connecting hole. After the upper precast wall panel body is placed, high-strength grout is injected into the connecting hole through the grouting port, thereby realizing the fixed connection between the vertical screw and the upper precast wall panel body.

[0038] To prevent grout from leaking out of the gaps and to improve the waterproofing of the joints, a further improvement to this technical solution is that sealing elements are provided on both the inner and outer sides (inner and outer sides of the vertical screws) of the gap between the upper precast wall panel and the cast-in-place floor layer. These sealing elements are preferably extruded rubber rods. Furthermore, an additional layer of sealant is applied to the outer side of the extruded rubber rod to further enhance the waterproofing of the joints.

[0039] A further improvement is that the top of the prefabricated wall panel body is provided with a tongue and groove joint that is lower on the outside and higher on the inside.

[0040] A further improvement is made by providing a tongue-and-groove joint at the connection between the cast-in-place floor slab and the precast wall panel body on the upper layer, with the outer side lower than the inner side. The cast-in-place floor slab is then poured a second time to create a 300mm ground floor layer, increasing the indoor height. Combined with the tongue-and-groove structure, this achieves effective waterproofing and seepage prevention.

[0041] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A construction method for a double-sided prefabricated sandwich composite wall panel, characterized in that, include: The precast wall panel body is composed of precast layers on both sides and an insulation layer disposed between the precast layers on both sides. The top of the precast wall panel body is provided with a horizontal connector and a vertical connector. The vertical connector includes a vertical screw and a vertical embedded part. The vertical embedded part is embedded in the top of the precast wall panel body. The bottom end of the vertical screw is connected to the vertical embedded part. The top end of the vertical screw passes through the reserved hole on the cast-in-place floor layer and is inserted into the connection hole at the bottom of the upper precast wall panel body. The reserved hole on the cast-in-place floor layer is filled with grout to connect the vertical screw to the cast-in-place floor layer. The construction method includes the following steps: The lower precast wall panel body is connected to the precast beam via transverse connectors; The lower part of the vertical connector is connected to the top of the lower precast wall panel body, and the upper part passes through the cast-in-place floor layer and is connected to the bottom of the cast-in-place floor layer and the upper precast wall panel body. Waterproofing and sealing construction of the outer side of the gap between the upper precast wall panel body, the lower precast wall panel body and the cast-in-place floor surface.

2. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 1, characterized in that, The transverse connector includes a transverse screw and a transverse embedded part. The transverse embedded part is embedded in the precast beam. The transverse screw passes through a reserved hole at the top of the precast wall panel body and is connected to the transverse embedded part. The outer end of the transverse screw is fixed by a nut.

3. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 2, characterized in that, High-strength grout is injected into the recess on the outer surface of the precast wall panel to accommodate the nut, and then sealed with mesh fabric.

4. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 1, characterized in that, The gaps between the top of the precast wall panel body and the precast beam, as well as the gaps between the cast-in-place floor slab and the ground, are all equipped with sealing elements.

5. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 1, characterized in that, The bottom end of the precast wall panel body of the upper layer is inserted into the vertical screw through the connecting hole, and grout is injected into the connecting hole through the grouting port that communicates with the connecting hole.

6. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 5, characterized in that, Sealing elements are provided on both the inner and outer sides of the gap between the precast wall panel body and the cast-in-place floor layer.

7. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 1, characterized in that, The top of the precast wall panel body is provided with a tongue and groove joint that is lower on the outside and higher on the inside.

8. The construction method of the double-sided prefabricated sandwich composite wall panel according to claim 1, characterized in that, The connection between the cast-in-place floor slab and the precast wall panel body on the upper layer is provided with a tongue and groove joint that is lower on the outside and higher on the inside, and the cast-in-place floor slab is constructed in two stages.

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