CN219219400U

CN219219400U - Building outer wall sealing structure

Info

Publication number: CN219219400U
Application number: CN202320359526.3U
Authority: CN
Inventors: 孙云海; 黄卿; 田忠先; 费强
Original assignee: Suzhou Erjian Construction Group Co ltd
Current assignee: Suzhou Erjian Construction Group Co ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-06-20
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses a building outer wall sealing structure, which comprises a plurality of prefabricated outer wall boards, a structural beam for fixing the prefabricated outer wall boards and a structural column for fixing the prefabricated outer wall boards, wherein the prefabricated outer wall boards are sequentially connected; the prefabricated external wall panels are connected with each other, a board seam is arranged between the prefabricated external wall panels, and the prefabricated external wall panels are characterized in that foaming agents, PE rods and MS sealant are filled in the board seam, the foaming agents are located on the inner side of the board seam, the PE rods are close to the outer side of the board seam, gaps are reserved between the foaming agents and the PE rods in the board seam, a drainage cavity is formed, and the MS sealant is used for plugging the gaps of the board seam located on the outer side of the PE rods. According to the prefabricated external wall panel, the foaming agent, the PE rod and the MS sealant are filled in the plate seams, and the drainage cavity between the foaming agent and the PE rod is used for draining water vapor, so that the installation air tightness of the prefabricated external wall panel is improved.

Description

Building outer wall sealing structure

Technical Field

The utility model belongs to the technical field of buildings, and particularly relates to a sealing structure of an outer wall of a building.

Background

In order to effectively cope with global climate change and reduce carbon emission, near-zero energy consumption buildings become an important trend of future development of the buildings. The assembled near-zero energy consumption building is characterized in that an assembled outer wall body is built on a main structure beam of the building, so that the construction can be completed quickly, and the assembled near-zero energy consumption building has the advantages of less material consumption, low energy consumption, clean construction site, fine construction, high building quality and the like. However, the traditional prefabricated external wall panels are manufactured by glue spraying treatment on the inner side and the outer side of the panel seam, so that the air tightness requirement cannot be met on one hand, the traditional prefabricated external wall panels are contradictory to the high air tightness required by near-zero energy consumption buildings, the traditional prefabricated external wall panels are long in time, the sealant is easy to crack, and the water seepage phenomenon is easy to occur. In addition, gaps between the traditional prefabricated external wall panels and the structural beams and the structural columns are untreated, and the air tightness requirement cannot be met.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the utility model provides a building outer wall seal structure for solve the current problem that prefabricated side fascia installation gas tightness is low.

In order to achieve the technical effects, the utility model adopts the following technical scheme:

a building outer wall sealing structure comprises a plurality of prefabricated outer wall plates, a structural beam for fixing the prefabricated outer wall plates and a structural column for fixing the prefabricated outer wall plates, wherein the prefabricated outer wall plates are sequentially connected; the prefabricated external wall panels are connected with each other, a board seam is arranged between the prefabricated external wall panels, and the prefabricated external wall panels are characterized in that foaming agents, PE rods and MS sealant are filled in the board seam, the foaming agents are located on the inner side of the board seam, the PE rods are close to the outer side of the board seam, gaps are reserved between the foaming agents and the PE rods in the board seam, a drainage cavity is formed, and the MS sealant is used for plugging the gaps of the board seam located on the outer side of the PE rods.

Further, the void length of the drainage cavity is 30+/-5 mm.

Further, the MS sealant is provided with an inward concave arc-shaped seam closing-in at the outer side end face of the slab seam.

Further, waterproof gas-barrier films are adhered to the outer side corner parts of the joints of the structural beams and the structural columns and the prefabricated external wall boards.

Further, the unilateral width of the waterproof and gas-insulated membrane is larger than the width of the plate seam by 120+/-6 mm.

Further, gaps are formed between the outer walls of the structural beams and the structural columns and the inner walls of the prefabricated external wall panels, and rock wool boards are densely filled in the gaps.

Further, the prefabricated external wall panel is an integrated heat-preserving structural panel formed by an inner leaf plate, a heat-preserving plate and an outer leaf plate, the periphery of the inner leaf plate is fixedly connected with the outer leaf plate, a containing cavity is formed in the middle of the prefabricated external wall panel, and the heat-preserving plate is densely filled in the containing cavity and is fixedly bonded with the inner leaf plate and the outer leaf plate.

Further, the heated board is XPS heated board, the inboard bulge that is formed with of outer leaf board in leaf board periphery department, outer leaf board passes through its bulge outer wall and interior leaf board fixed connection, the holding chamber is bulge, interior leaf board and the cavity that forms after outer leaf board encloses jointly.

Further, the bottom of the outer leaf plate is provided with a downward extension part, and the lower end of the prefabricated outer wall plate is fixedly connected with the lower floor plate through a dowel bar.

Further, a Z-shaped seam is formed between the lower end surface of the prefabricated external wall panel and the lower floor slab, weather-resistant glue, PE rods, adhesive tapes, grouting materials and caulking materials are sequentially filled in the Z-shaped seam from outside to inside, and a gap is reserved between the adhesive tapes and the PE rods to form a drainage cavity.

Compared with the prior art, the utility model has the beneficial effects that:

according to the prefabricated external wall panel, the foaming agent, the PE rod and the MS sealant are filled in the plate seams, and the drainage cavity between the foaming agent and the PE rod is used for discharging water vapor, so that the installation air tightness of the prefabricated external wall panel is improved.

The foregoing description is only an overview of the present utility model, and may be implemented in accordance with the teachings of the present specification, so that the foregoing and other objects, features, and advantages of the present utility model may be more readily understood, and further detailed description of the present utility model may be had by reference to the accompanying drawings and examples, it being apparent that the examples described are some, but not all, of the embodiments of the utility model.

Drawings

FIG. 1 is a schematic view of a sealing and splicing structure of a prefabricated external wall panel in the middle of a structural beam or a structural column;

FIG. 2 is a schematic view of a seal splice structure of a prefabricated exterior wall panel of the present utility model at a structural beam or column corner;

FIG. 3 is a schematic structural view of a prefabricated exterior wall panel and building seal structure according to the present utility model;

fig. 4 is a schematic structural view of the prefabricated external wall panel of the present utility model.

The reference numerals and corresponding names in the drawings are:

1. lower floor slab, 2 prefabricated external wall panel, 21 internal leaf plate,

22. Thermal insulation board, 23, outer blade board, 231, protruding part,

232. Extension part, 3 structural beam, 4 structural column,

5. Upper floor slab, 6 rock wool board, 7 foaming agent,

PE rod, 9.MS sealant, 10.waterproof and air-isolating film,

11. Weather-resistant glue, 12, adhesive tape, 13, grouting material,

14. Caulking material, 15. Draining cavity.

Detailed Description

As shown in fig. 3 and 4, the building outer wall sealing structure comprises a plurality of prefabricated external wall panels 2 which are sequentially connected, and a structural beam 3, a structural column 4, an upper floor 5 and a lower floor 1 for fixing the prefabricated external wall panels 2 of a building. The prefabricated external wall panel 2 is an integrated heat-preserving structural panel consisting of an inner leaf plate 21, a heat-preserving plate 22 and an outer leaf plate 23. The insulation board 22 adopts XPS insulation board, and the inboard of outer leaf board 23 is formed with bulge 231 in interior leaf board 21 periphery, and outer leaf board 23 bottom is equipped with downward extension 232. The outer leaf plate 23 is fixedly connected with the periphery of the inner leaf plate 21 through the protruding part 231 thereof, and forms a containing cavity in the middle part, and the heat insulation plate 22 is densely filled in the containing cavity and is fixedly adhered to the inner leaf plate 21 and the outer leaf plate 23. The lower end of the prefabricated external wall panel 2 is fixedly connected with the lower floor slab 1 through dowel bars, and the upper end of the prefabricated external wall panel is fixedly connected with the structural beam 3 through a wall panel adapter (not shown in the figure). A Z-shaped seam is formed between the lower end face of the prefabricated external wall panel 2 and the lower floor board 1, weather-resistant glue 11, PE rods 8, adhesive tapes 12, grouting materials 13 and caulking materials 14 are sequentially filled in the Z-shaped seam from outside to inside, and a gap of 30+/-5 mm is reserved between the adhesive tapes 12 and the PE rods 8 to form a drainage cavity 15 for water vapor drainage. A sealing seam is reserved between the upper end face of the prefabricated external wall panel 2 and the upper floor board 5, weather-proof glue 11, PE rods 8 and adhesive tapes 12 are filled in the sealing seam, and a drainage cavity 15 with the diameter of 30+/-5 mm is reserved between the adhesive tapes 12 and the PE rods 8. As shown in fig. 1 and 2, a board seam is arranged between two prefabricated external wall panels 2 which are connected with each other, and a foaming agent 7, a PE rod 8 and an MS sealant 9 are filled in the board seam. Wherein, foaming agent 7 is located the board seam inboard, and PE stick 8 is close to the board seam outside, and the board seam is left between foaming agent 7 and PE stick 8 and is equipped with 30 + -5 mm's drainage cavity 15 for discharge steam, and MS sealant 9 is used for shutoff board seam is located the space in PE stick 8 outside, and its outside terminal surface department is formed with the beautiful seam binding off of indent arc. In addition, also leave the gap between the outer wall of structural beam 3 and structural column 4 and the prefabricated side fascia 2 inner wall, closely knit packing in this gap has rock wool board 6, and the outside corner position of structural beam 3 and structural column 4 and prefabricated side fascia 2 junction pastes has waterproof gas barrier 10, and the unilateral width of waterproof gas barrier 10 is greater than board gap width 120 + -6 mm.

Before sealing construction, the prefabricated external wall panel is unitized and split and the accuracy of the size of the wall panel is verified by means of the BIM technology and the actual working condition. After the size is confirmed, finite element software is adopted to simulate various working conditions faced by the prefabricated external wall panel, and the mechanical property and the thermal property of the prefabricated external wall panel are designed, so that the heat transfer coefficient of the prefabricated external wall panel is less than or equal to 0.4 k/(w.m) and meets the zero-energy-consumption building requirement. And in the production stage, the whole process of the prefabricated external wall panel production process is controlled, the design thickness of the internal filling heat-insulating layer is required to be met, and the structural size meets the specification requirement. In the construction stage, the plate seam air tightness between the prefabricated external wall panels is as follows: the method comprises the steps of opening a foaming agent to fill the board seam at the end face of the inner side of the board seam, reserving a cavity of 30-40mm on the outer side, cutting by a foaming agent strictly forbidden knife to ensure the air tightness of the board seam, filling the foaming agent in the board seam or overflowing the board seam into the board seam by hands for a certain distance when the foaming agent is quickly hardened, then filling PE rods (the diameter of the PE rods is larger than the width of the board seam, so that the PE rods are in interference fit sealing), sealing the board seam by MS sealant, closing in the arc-shaped board seam, and simultaneously ensuring that a drainage cavity of about 30mm is formed between the PE rods and the foaming agent, so that water vapor is discharged conveniently. The upper end face and the lower end face of the prefabricated external wall panel are sealed: the sealing seam between prefabricated side fascia up end and upper floor board is from outside-in proper order packing rubber strip, PE stick and resistant glue of waiting, also leaves between rubber strip and the PE stick and is equipped with about 30 mm's drainage cavity. A Z-shaped seam is formed between the upper end face of the prefabricated external wall panel and the lower floor slab, weather-resistant glue, a PE rod, a rubber strip, grouting materials and caulking materials are sequentially filled in the Z-shaped seam from outside to inside, and a drainage cavity with the thickness of about 30mm is reserved between the rubber strip and the PE rod. The sealing between the prefabricated external wall panel and the structural beam and the structural column is as follows: the rock wool board is densely filled in gaps between the prefabricated external wall boards and the structural beams and the structural columns, the outer side of the rock wool board is stuck to the corners of the prefabricated external wall boards and the structural beams or the corners of the external wall boards and the corners of the structural columns by adopting an L-shaped waterproof air-isolating film, and the unilateral width of the waterproof air-isolating film is larger than the width of the board gaps by 120+/-6 mm.

The utility model meets the requirements of zero-energy-consumption buildings by processing the plate seams among the prefabricated external wall boards and by performing airtight processing on the plate seams among the prefabricated external wall boards, the prefabricated columns and the beams. According to the calculation of the building carbon emission calculation standard (GBT 51366-2019), the carbon emission of the project in the whole life cycle of the building is only 31.7% of that of a standard building, and the carbon peak goal and the carbon neutralization prospect are tightly combined, so that the energy consumption and the carbon emission of the building are reduced. The comprehensive building is evaluated according to the building technical standard with near zero energy consumption (GB/T51350-2019) and the building evaluation standard with near zero energy consumption (T/CABACE 003-2019), and the comprehensive energy saving rate of the building is higher than 98%; the energy saving rate of the building body is more than 38.3%; the renewable energy utilization rate is higher than 99%.

The present utility model is not limited to the above-described specific embodiments, and it is apparent to those skilled in the art from the above-described idea that various modifications can be made without inventive step and without departing from the scope of the present utility model.

Claims

1. A building outer wall sealing structure comprises a plurality of prefabricated outer wall plates, a structural beam for fixing the prefabricated outer wall plates and a structural column for fixing the prefabricated outer wall plates, wherein the prefabricated outer wall plates are sequentially connected; the prefabricated external wall panels are connected with each other, a board seam is arranged between the prefabricated external wall panels, and the prefabricated external wall panels are characterized in that foaming agents, PE rods and MS sealant are filled in the board seam, the foaming agents are located on the inner side of the board seam, the PE rods are close to the outer side of the board seam, gaps are reserved between the foaming agents and the PE rods in the board seam, a drainage cavity is formed, and the MS sealant is used for plugging the gaps of the board seam located on the outer side of the PE rods.

2. A building exterior wall sealing structure according to claim 1, wherein the void length of the drainage cavity is 30±5mm.

3. The exterior wall sealing structure according to claim 1, wherein the MS sealer is formed with an inward concave arc-shaped seam-closing opening at an outer end face of the seam.

4. The building exterior wall sealing structure according to claim 1, wherein a waterproof and air-isolating film is adhered to the outer corner part of the junction of the structural beam and the structural column with the prefabricated exterior wall panel.

5. The building exterior wall sealing structure according to claim 4, wherein the single side width of the waterproof and gas-barrier film is larger than the width of the board slit by 120+ -6 mm.

6. The building exterior wall sealing structure according to claim 4, wherein gaps are formed between the outer walls of the structural beams and the structural columns and the inner walls of the prefabricated exterior wall panels, and rock wool boards are densely filled in the gaps.

7. The building outer wall sealing structure according to claim 1, wherein the prefabricated outer wall plate is an integrated heat-preserving structural plate composed of an inner leaf plate, a heat-preserving plate and an outer leaf plate, the periphery of the inner leaf plate is fixedly connected with the outer leaf plate, a containing cavity is formed in the middle of the inner leaf plate, and the heat-preserving plate is densely filled in the containing cavity and is fixedly bonded with the inner leaf plate and the outer leaf plate.

8. The building exterior wall sealing structure according to claim 7, wherein the insulation board is an XPS insulation board, a protruding portion is formed at the periphery of the inner leaf plate on the inner side of the outer leaf plate, the outer leaf plate is fixedly connected with the inner leaf plate through the outer wall of the protruding portion, and the accommodating cavity is a cavity formed by surrounding the protruding portion, the inner leaf plate and the outer leaf plate together.

9. The building exterior wall sealing structure according to claim 8, wherein the bottom of the exterior blade plate is provided with a downward extension portion, and the lower end of the prefabricated exterior wall plate is fixedly connected with the lower floor plate through a dowel bar.

10. The building exterior wall sealing structure according to claim 9, wherein a Z-shaped seam is formed between the lower end face of the prefabricated exterior wall board and the lower floor board, weather-resistant glue, PE rods, adhesive tapes, grouting materials and caulking materials are sequentially filled in the Z-shaped seam from outside to inside, and a gap is reserved between the adhesive tapes and the PE rods to form a drainage cavity.