CN110607848A - Vertical abutted seam waterproof structure of assembled prefabricated sandwich heat-insulation outer wall and implementation method - Google Patents
Vertical abutted seam waterproof structure of assembled prefabricated sandwich heat-insulation outer wall and implementation method Download PDFInfo
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- CN110607848A CN110607848A CN201910780985.7A CN201910780985A CN110607848A CN 110607848 A CN110607848 A CN 110607848A CN 201910780985 A CN201910780985 A CN 201910780985A CN 110607848 A CN110607848 A CN 110607848A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/665—Sheets or foils impervious to water and water vapor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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Abstract
The invention discloses a vertical abutted seam waterproof structure of an assembled prefabricated sandwich heat-insulation outer wall and an implementation method, and belongs to the technical field of abutted seam waterproof treatment. Including prefabricated side fascia, cast-in-place side fascia and reserve some level concatenation seam, prefabricated side fascia includes first PCF side fascia and precast concrete board, cast-in-place side fascia includes second PCF side fascia and cast-in-place concrete, first PCF side fascia and the concatenation of second PCF side fascia, precast concrete board passes through the concatenation of wave form face with cast-in-place concrete, first PCF side fascia and second PCF side fascia all include the heat preservation, backing material and resistant building sealing layer, be equipped with vertical drainage cavity between heat preservation and the backing material, be equipped with oblique ascending breakwater and heat preservation fixed connection on the backing material, be equipped with the aqueduct on the breakwater, level concatenation seam includes horizontal drainage cavity, the outside-in is provided with two-layer waterproof unit in the horizontal drainage cavity, adopt multistage waterproof to have high-efficient ground water-proof effects and be convenient for the construction.
Description
Technical Field
The invention belongs to the technical field of seam waterproof treatment, and particularly relates to an assembled prefabricated sandwich heat-insulating outer wall vertical seam waterproof structure and an implementation method thereof.
Background
The assembly type structure, namely the component, is industrially produced in a factory and is directly assembled when being transported to a site. The components are produced in a standardized manner in a factory, so that the quality is standardized, the on-site dust fall and noise reduction are facilitated, the generation of solid wastes is reduced, the on-site personnel allocation is reduced, the turnover material allocation is reduced, and the on-site green construction is realized. The outer wall prefabricated part is from taking the heat preservation, and traditional external scaffolding is not needed in the main building construction, compares more convenient, swift with traditional cast-in-place structure, practices thrift total time limit for a project.
When the prefabricated outer wall with the assembled structure is installed, 20mm of joints are reserved between walls, subsequent joint treatment is difficult, building glue is injected into the joints in the existing treatment method, the method is greatly influenced by the operation environment, such as humidity, temperature and the like, and the joint seepage is probably caused, so that hidden dangers are caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an assembly type prefabricated sandwich heat-insulation outer wall vertical abutted seam waterproof structure and an implementation method.
In order to achieve the purpose, the invention adopts the following scheme:
the prefabricated sandwich heat-insulating outer wall vertical abutted seam waterproof structure comprises a prefabricated outer wall panel, a cast-in-place outer wall panel and a horizontal abutted seam reserved between the prefabricated outer wall panel and the cast-in-place outer wall panel, wherein the prefabricated outer wall panel comprises a first PCF outer wall template and a prefabricated concrete panel which are integrally connected, the cast-in-place outer wall panel comprises a second PCF outer wall template and cast-in-place concrete which are integrally connected, the first PCF outer wall template and the second PCF outer wall template are spliced, the prefabricated concrete panel and the cast-in-place concrete are spliced through a corrugated surface, the first PCF outer wall template and the second PCF outer wall template sequentially comprise a heat-insulating layer, a backing material and a weather-resistant building sealing layer from inside to outside, a vertical drainage cavity is arranged between the heat-insulating layer and the backing material, a water baffle plate positioned in the vertical drainage cavity is arranged on the backing material, the water baffle is provided with a water guide pipe, the water guide pipe penetrates through a backing material and a weather-resistant building sealing layer, the horizontal splicing seam comprises a horizontal drainage cavity, and two layers of waterproof units are arranged in the horizontal drainage cavity from outside to inside.
Furthermore, the horizontal drainage cavity is one or the combination of a Y-shaped structure or a step structure which is gradually increased from outside to inside.
Furthermore, the two layers of waterproof units comprise an outer concealed backing and an inner waterproof assembly, the concealed backing is made of foam strips with the thickness of 10mm and the width of 30mm, the distance between the concealed backing and the outer edge of the horizontal drainage cavity is 20-30 mm, a weather-resistant building sealing layer is attached to the outer side of the concealed backing, and the waterproof assembly is located between the first PCF outer wall formwork and the second PCF outer wall formwork and fixedly connected with the precast concrete slab and the cast-in-place concrete.
Further, the secretly adorn the backing including the waterproof portion of vertical setting and the connecting portion of horizontal setting, waterproof portion parallel arrangement has two and upper and lower both sides face and all is equipped with waterproof line, connecting portion are netted grid structure.
Furthermore, the waterproof assembly comprises a polyethylene foam strip and a self-adhesive butyl tape, the thickness of the polyethylene foam strip is the same as that of the heat insulation layer, the self-adhesive butyl tape is bonded with the precast concrete plate, the cast-in-place concrete, the heat insulation layer and the polyethylene foam strip, and the bonding width of the self-adhesive butyl tape on two sides of the splicing seam of the precast concrete plate and the cast-in-place concrete is not less than 25 mm.
Furthermore, the aqueduct is positioned above the horizontal splicing seam and is 150-200 mm away from the horizontal splicing seam, a groove is arranged on the aqueduct positioned in the vertical drainage cavity, and the included angle between the groove and the backing material is 45-60 degrees.
The invention also discloses an implementation method of the vertical abutted seam waterproof structure of the assembled prefabricated sandwich heat-insulation outer wall, which comprises the following steps:
step one, mounting a second PCF external wall template of the prefabricated external wall panel and the cast-in-place external wall panel and an internal wall supporting template and calibrating verticality;
step two, polishing the splicing part of the precast concrete plate and the cast-in-place concrete into a corrugated surface;
filling polyethylene foam strips with the same material and thickness between the heat insulation plates on the first PCF external wall template and the second PCF external wall template, covering self-adhesive butyl tapes on the surfaces of splicing seams of the precast concrete plate and the cast-in-place concrete, wherein the bonding width of the self-adhesive butyl tapes on the two sides of the splicing seams of the precast concrete plate and the cast-in-place concrete is not less than 25mm, and adopting temporary mechanical fixing measures;
fourthly, forming a vertical drainage cavity in the abutted seams by using a backing material, installing a water guide pipe made of a PVC pipe with the length of 60mm and the diameter of 16mm in each vertical abutted seam, and arranging the position, which is 150-200 mm away from the upper part of the horizontal abutted seam, of each vertical abutted seam, wherein the included angle between a groove and the backing material is 45-60 degrees after installation;
fifthly, inserting a concealed backing made of a foam strip with the thickness of 10mm and the width of 30mm into the horizontal drainage cavity for about 20-30 mm, and sealing the outside of the concealed backing by adopting a weather-resistant building sealing layer;
and step six, finally, sealing the vertical abutted seams by adopting a weather-resistant building sealing layer, and pouring cast-in-place concrete on the inner side of the second PCF outer wall template.
Compared with the prior art, the invention can obtain the following technical effects:
1. according to the invention, the precast concrete plate and the cast-in-place concrete are spliced through the corrugated surface, the step of filling filler is omitted, the hidden danger of water leakage caused by a plurality of connecting seams is avoided, meanwhile, the vertical drainage cavity is arranged between the heat preservation layer and the backing material, the water infiltrated between the heat preservation layer and the backing material is convenient to collect, meanwhile, the water baffle plate which is inclined upwards is arranged on the backing material for collecting water, the water guide pipe with a 45-60-degree groove is arranged on the water baffle plate, the water guide pipe is positioned 150-200 mm above the horizontal splicing seam, the integral strength of the backing material positioned around the horizontal splicing seam is effectively enhanced, the rapid water drainage is realized by utilizing the larger drainage area of the water guide pipe, the water accumulation is prevented, and the double-layer.
2. The horizontal drainage cavity is of a Y-shaped structure or a step structure gradually increasing from outside to inside or a combination of the two structures, and the structure has a waterproof and waterproof effect.
3. The double-layer waterproof units in the horizontal drainage cavity are respectively backing materials and a waterproof assembly, the connecting part and the waterproof part of the concealed backing are combined for use, so that the backing materials on the upper side and the lower side are tightly attached, the excellent waterproof effect is achieved, meanwhile, the waterproof part is provided with waterproof lines and further waterproofed by the waterproof lines, the waterproof assembly comprises polyethylene foam strips located between the heat-insulating layers on the two sides and self-adhesive butyl tapes for connection, the connection between the splicing seams and the horizontal drainage cavity can be effectively isolated by the self-adhesive butyl tapes, and the excellent waterproof and isolating effect is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of a horizontal splicing seam in embodiment 1;
FIG. 3 is a schematic view of the overall construction of the concealed backing according to the present invention;
fig. 4 is a schematic view of the overall structure of the horizontal splicing seam in embodiment 2.
In the figure: 1. prefabricating an external wall panel; 11. a first PCF exterior wall template; 12. prefabricating a concrete slab; 2. cast-in-place external wall panels; 21. a second PCF exterior wall template; 22. casting concrete in situ; 3. horizontally splicing seams; 31. a horizontal drainage cavity; 4. a heat-insulating layer; 5. a backing material; 51. a water baffle; 511. a water conduit; 6. a weatherable building sealant layer; 7. a vertical drainage cavity; 8. two layers of waterproof units; 81. concealed installation of a back lining; 811. a waterproof section; 812. A connecting portion; 82. a waterproof assembly; 821. a polyethylene foam strip; 822. self-adhesive butyl tape.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1 to 3, the waterproof structure comprises a prefabricated external wall panel 1, a cast-in-place external wall panel 2, and a horizontal splicing seam 3 reserved between the prefabricated external wall panel 1 and the cast-in-place external wall panel 2, wherein the prefabricated external wall panel 1 comprises a first PCF external wall formwork 11 and a prefabricated concrete panel 12 which are integrally connected, the cast-in-place external wall panel 2 comprises a second PCF external wall formwork 21 and a cast-in-place concrete 22 which are integrally connected, the first PCF external wall formwork 11 and the second PCF external wall formwork 21 are spliced, the prefabricated concrete panel 12 and the cast-in-place concrete 22 are spliced through a corrugated surface, the first PCF external formwork 11 and the second PCF external wall formwork 21 respectively comprise an insulating layer 4, a backing material 5 and a weather-resistant building sealing layer 6 from inside to outside in sequence, a vertical drainage cavity 7 for discharging possibly infiltrated water is arranged between the insulating layer 4 and the backing material 5, a water baffle 51 positioned in the vertical drainage cavity 7, the water in the vertical drainage cavity 7 is collected through the water baffle 51, the water baffle 51 is obliquely arranged upwards and is fixedly connected with the heat-insulating layer 4 to ensure the space and the strength of the vertical drainage cavity 7, the water baffle 51 is provided with a water guide pipe 511 made of a PVC pipe with the diameter of 16mm and the length of 60mm, the water guide pipe 511 penetrates through the backing material 5 and the weather-resistant building sealing layer 6, the water guide pipe 511 is positioned above the horizontal splicing seam 3 and is 200mm away from the horizontal splicing seam 31 to ensure the integral structure of the vertical drainage cavity 7 formed by the backing material 5 and the heat-insulating layer 4, the water guide pipe 511 positioned in the vertical drainage cavity 7 is provided with a groove, an included angle between the groove and the backing material 5 is 45 degrees to ensure that the contact area and the flow velocity of the water in the vertical drainage cavity 7 and the water guide pipe 511 realize rapid flow to avoid the occurrence of ponding extending into the inner wall, and the water in the vertical drainage cavity, and water in the vertical drainage cavity 7 is prevented from permeating into the inner side wall.
Horizontal concatenation seam 3 is including the horizontal drainage cavity 31 for the Y shape structure, the slope that the Y shape structure set up for 5 bottoms of backing material of first PCF outer wall template 11 upwards sets up and the slope that sets up of 5 bottoms of backing material of second PCF outer wall template 22 upwards sets up constitute, the slope angle that the slope that sets up of 5 bottoms of backing material of first PCF outer wall template 11 upwards sets up is less than the slope angle that the slope that sets up of 5 bottoms of backing material of second PCF outer wall template 22 upwards sets up, this Y shape structure plays the waterproof separation effect, be provided with two-layer waterproof unit 8 outside-in the horizontal drainage cavity 31, utilize two-layer waterproof unit 8 to carry out the multilayer shutoff to horizontal drainage cavity 31, prevent. The two-layer waterproof unit 8 comprises an outer concealed backing 81 and an inner waterproof assembly 82, the concealed backing 81 is made of a polyethylene material foam strip with the thickness of 10mm and the width of 30mm, the distance between the concealed backing 81 and the outer edge of the horizontal drainage cavity 31 is 25m, a supporting point is provided for the two backing materials 5, the two backing materials simultaneously play a waterproof function, the outer side of the concealed backing 81 is attached with a weather-resistant building sealing layer 6, and the waterproof assembly 82 is located between the first PCF outer wall formwork 11 and the second PCF outer wall formwork 21, fixedly connected with the precast concrete slab 12 and the cast-in-place concrete 22.
Wherein, the secretly adorn backing 81 including the waterproof portion 811 of vertical setting and the connecting portion 812 of horizontal setting, waterproof portion 811 parallel arrangement has two and upper and lower both sides face all to set up domaticly, domatic and backing material 5's contained angle is 5, because secretly adorn backing 81 and make for elastic material, can take place elastic deformation when filling in and can effectively laminate with backing material 5 when stopping in to certain degree of depth and play the waterproof function of second floor, and it is more favorable to waterproofly all to be equipped with waterproof line on domatic, connecting portion 812 is that the mesh grid structure is used for connecting two waterproof portions 811, elastic deformation takes place about connecting portion 812 when filling in, fill in about two waterproof portions 811 extrusion and then ensure or further confirm backing material 5 and waterproof portion 811's laminating degree when certain degree of depth.
The waterproof assembly 82 comprises a polyethylene foam strip 821 and a self-adhesive butyl tape 822, the polyethylene foam strip 821 is the same as the heat-insulating layer 4 in thickness, the self-adhesive butyl tape 822 is bonded with the precast concrete plate 12, the cast-in-place concrete 22, the heat-insulating layer 4 and the polyethylene foam strip 821, the bonding width of the self-adhesive butyl tape 822 to two sides of a splicing seam of the precast concrete plate 12 and the cast-in-place concrete 22 is 30mm, the self-adhesive butyl tapes 822 on two sides of the splicing seam are used for bonding the polyethylene foam strip 821, and the waterproof plugging function of the horizontal splicing seam 3 is achieved.
Example 2:
as shown in fig. 4, unlike embodiment 1: the horizontal drainage cavity 31 is of a stepped structure gradually increasing from outside to inside, the concealed backing 81 is arranged on the lowest surface of the stepped structure, and the waterproof component 82 is located on the highest surface, so that a high-efficiency waterproof structure is realized.
Example 3:
as shown in fig. 1 to 4, the method for implementing the waterproof structure includes the following steps:
step one, installing a second PCF external wall template 21 and an internal wall supporting template of the prefabricated external wall panel 1 and the cast-in-place external wall panel 2 and calibrating the verticality;
secondly, polishing the splicing part of the precast concrete plate 12 and the cast-in-place concrete 22 into a corrugated surface;
step three, filling polyethylene foam strips 821 of the waterproof assembly 82 which are made of the same material and have the same thickness between the heat insulation plates on the first PCF external wall template 11 and the second PCF external wall template 21, covering self-adhesive butyl tapes 822 on the surfaces of the splicing seams of the precast concrete plate 12 and the cast-in-place concrete 22, and sealing the inner sides of the horizontal splicing seams 3 by adopting temporary mechanical fixing measures, wherein the self-adhesive butyl tapes 822, the precast concrete plate 12 and the cast-in-place concrete 22 are bonded at two sides of the splicing seams by 30mm in width;
fourthly, forming vertical drainage cavities 7 in the joints by using a backing material 5, installing a water guide pipe 511 made of a PVC pipe with the length of 60mm and the diameter of 16mm on each vertical joint, and enabling the installation position to be 200mm above the horizontal joint 3, so that the overall structure of the vertical drainage cavities 7 and the structural strength of the bottom of the backing material 5 are ensured, and an included angle between a groove and the backing material 5 is 45 degrees after installation;
fifthly, inserting a concealed backing 81 made of a foam strip with the thickness of 10mm and the width of 30mm into the horizontal drainage cavity 31 for about 25mm, and sealing the outside of the concealed backing 81 by adopting a weather-resistant building sealing layer 6;
and step six, finally, sealing the vertical abutted seams by using weather-resistant building sealing layers 6, wherein the weather-resistant building sealing layers 6 need to be firmly bonded and have good capability of bearing abutted seam displacement, and pouring the cast-in-place concrete 22 on the inner side of the second PCF outer wall template 21.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The prefabricated sandwich heat-insulation outer wall vertical seam waterproof structure is characterized by comprising a prefabricated outer wall panel (1), a cast-in-place outer wall panel (2) and horizontal splicing seams (3) reserved between the prefabricated outer wall panel (1) and the cast-in-place outer wall panel (2), wherein the prefabricated outer wall panel (1) comprises a first PCF outer wall template (11) and a prefabricated concrete panel (12) which are integrally connected, the cast-in-place outer wall panel (2) comprises a second PCF outer wall template (21) and cast-in-place concrete (22) which are integrally connected, the first PCF outer wall template (11) and the second PCF outer wall template (21) are spliced, the prefabricated concrete panel (12) and the cast-in-place concrete (22) are spliced through a corrugated surface, and the first PCF outer wall template (11) and the second PCF outer wall template (21) sequentially comprise a heat-insulation layer (4), a backing material (5) and a weather-resistant building sealing layer (6) from, be equipped with vertical drainage cavity (7) between heat preservation (4) and backing material (5), be equipped with breakwater (51) that are located vertical drainage cavity (7) on backing material (5), breakwater (51) set up and with heat preservation (4) fixed connection to one side, be equipped with aqueduct (511) on breakwater (51), aqueduct (511) run through backing material (5) and resistant building sealing layer (6), horizontal concatenation seam (3) are including horizontal drainage cavity (31), outside-in is provided with two-layer waterproof unit (8) in horizontal drainage cavity (31).
2. The assembly type prefabricated sandwich heat-insulating outer wall vertical abutted seam waterproof structure is characterized in that the horizontal drainage cavity (31) is of a Y-shaped structure or a step structure gradually increasing from outside to inside or a combination of the Y-shaped structure and the step structure.
3. The prefabricated sandwich heat-insulating exterior wall vertical abutted seam waterproof structure is characterized in that the two layers of waterproof units (8) comprise an outer concealed backing (81) and an inner waterproof assembly (82), the concealed backing (81) is made of a foam strip which is 10mm thick and 30mm wide, the distance between the concealed backing (81) and the outer edge of the horizontal drainage cavity (31) is 20-30 mm, a weather-resistant building sealing layer (6) is attached to the outer side of the concealed backing (81), and the waterproof assembly (82) is located between the first PCF exterior wall formwork (11) and the second PCF exterior wall formwork (21) and fixedly connected with the prefabricated concrete slab (12) and the cast-in-place concrete (22).
4. The assembled prefabricated sandwich heat-insulating outer wall vertical abutted seam waterproof structure is characterized in that the concealed backing (81) comprises a waterproof part (811) arranged longitudinally and a connecting part (812) arranged transversely, two waterproof parts (811) are arranged in parallel, waterproof lines are arranged on the upper side surface and the lower side surface of each waterproof part, and the connecting part (812) is of a net-shaped grid structure.
5. The fabricated prefabricated sandwich heat-insulating exterior wall vertical seam waterproof structure of claim 3, wherein the waterproof assembly (82) comprises a polyethylene foam strip (821) and a self-adhesive butyl tape (822), the polyethylene foam strip (821) and the heat-insulating layer (4) have the same thickness, the self-adhesive butyl tape (822) is bonded with the precast concrete plate (12), the cast-in-place concrete (22), the heat-insulating layer (4) and the polyethylene foam strip (821), and the bonding width of the self-adhesive butyl tape (822) on two sides of the splicing seam of the precast concrete plate (12) and the cast-in-place concrete (22) is not less than 25 mm.
6. The assembly type prefabricated sandwich heat-insulating outer wall vertical splicing seam waterproof structure is characterized in that the water guide pipe (511) is located above the horizontal splicing seam (3) and is 150-200 mm away from the horizontal splicing seam (3), a groove is formed in the water guide pipe (511) located in the vertical drainage cavity (7), and an included angle between the groove and the backing material (5) is 45-60 degrees.
7. The implementation method of the vertical abutted seam waterproof structure of the assembled prefabricated sandwich heat-insulating outer wall according to any one of claims 1 to 6, is characterized by comprising the following steps of:
step one, installing a second PCF external wall template (21) of the prefabricated external wall panel (1) and the cast-in-place external wall panel (2) and an internal wall supporting template and calibrating verticality;
secondly, polishing the splicing part of the precast concrete plate (12) and the cast-in-place concrete (22) into a corrugated surface;
filling polyethylene foam strips (821) with the same material and thickness between the heat insulation plates on the first PCF external wall template (11) and the second PCF external wall template (21), covering self-adhesive butyl tapes (822) on the surfaces of splicing seams of the precast concrete plate (12) and the cast-in-place concrete (22), wherein the bonding width of the self-adhesive butyl tapes (822) on the two sides of the splicing seams of the precast concrete plate (12) and the cast-in-place concrete (22) is not less than 25mm, and adopting temporary mechanical fixing measures;
fourthly, forming a vertical drainage cavity (7) in each splicing seam by using a backing material (5), installing a water guide pipe (511) made of a PVC pipe with the length of 60mm and the diameter of 16mm in each vertical splicing seam, and arranging a position 150-200 mm above the horizontal splicing seam (3) at a distance, wherein the included angle between the groove and the backing material (5) is 45-60 degrees after installation;
fifthly, a concealed backing (81) made of a foam strip with the thickness of 10mm and the width of 30mm is plugged into the horizontal drainage cavity (31) for about 20-30 mm, and then the outer side of the concealed backing (81) is sealed by a weather-resistant building sealing layer (6);
and step six, finally, sealing the vertical abutted seams by adopting weather-resistant building sealing layers (6), and pouring cast-in-place concrete (22) on the inner side of the second PCF outer wall template (21).
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| CN113846815A (en) * | 2021-09-26 | 2021-12-28 | 浙江绿筑集成科技有限公司 | External wallboard waterproof structure with drainage plate seam water seepage function and construction method |
| CN114541619A (en) * | 2022-04-02 | 2022-05-27 | 江苏丰彩节能科技有限公司 | Heat-insulating structure integrated prefabricated external wall panel splicing structure and method thereof |
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