Fabricated ultralow-energy-consumption overhanging type closed balcony system and construction method thereof

Abstract

The invention discloses a fabricated ultra-low-energy-consumption overhanging type closed balcony system and a construction method thereof. The construction method comprises the following steps that firstly, a prefabricated bottom plate is constructed; and secondly, first joint bars and second joint bars are arranged in the vertical hole channels of the prefabricated bottom plate. And step 3, surveying and setting out. And 4, the outer hanging plate and the side hanging plate are installed. Fifthly, second horizontal plugging materials are arranged on the inner sides of the tops of the transverse prefabricated plates and the longitudinal prefabricated plates, and the inner sides of the second horizontal plugging materials are filled with second waterproof mortar layers; second horizontal sealing rods are arranged on the outer sides of the tops of the transverse prefabricated plates and the longitudinal prefabricated plates. And sixthly, an upper-layer prefabricated bottom plate is installed. And seventhly, the second step to the sixth step are repeated till construction of the upper-layer prefabricated bottom plate on the top of the topmost balcony is completed, and grouting materials are poured into the vertical hole channels in the top of the topmost balcony till construction is completed. According to the method, the technical problems that many problems still exist in traditional closed balcony type selection, material selection, installation and connection, air tightness treatment and the like, the construction progress is slow, and a mature practice system is lacked are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, and in particular relates to an assembled ultra-low energy consumption cantilevered closed balcony system and a construction method thereof. Background Art

[0002] With the rapid development of prefabricated ultra-low energy consumption buildings, the design and construction technology of ultra-low energy consumption buildings has been rapidly promoted and applied. However, in the practice of enclosed balcony engineering in prefabricated ultra-low energy consumption residential projects, there are still many technical difficulties in the selection of enclosure structures, material selection, installation and connection, and airtightness treatment, and there is a lack of mature practice systems.

[0003] (1) There are two common practices for enclosure structures: one is to build secondary structures in the later stage, and then apply insulation for construction. The disadvantage is that it reduces the overall assembly rate, increases the amount of secondary structure engineering (structural columns and window lintels need to be constructed, which is time-consuming and labor-intensive), and reduces the overall construction progress of the prefabricated project. Second, if the balcony is prefabricated, the external panels are mainly connected and fixed with steel plates. The traditional balcony prefabricated external panels are connected using a "dry" steel plate connection method. The balcony panels and external panels are connected by connecting steel plates + embedded parts. This connection method has complex node structures, a large number of joints in the balcony area, strict requirements on the processing and installation errors of components, connection nodes that are prone to quality problems in the later decoration surface layer, difficulty in airtightness treatment construction, and poor insulation performance. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled ultra-low energy consumption cantilevered closed balcony system and its construction method, in order to solve the technical problems that the traditional closed balcony selection, material selection, installation and connection, airtightness treatment still have many difficulties, the construction progress is slow, and there is a lack of a mature practice system.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] An assembled ultra-low energy consumption cantilevered closed balcony system, comprising an exterior hanging board, a side hanging board and a balcony board; The balcony slab is a composite slab, which is arranged at each floor slab of the main structure; cast-in-place beams are arranged at the edges of the floor slabs; the balcony slab includes a prefabricated bottom slab and a bottom cast-in-place layer; the inner side of the prefabricated bottom slab is connected to the cast-in-place beams of the corresponding layer of the main structure; upper flaps are arranged on the top of the prefabricated bottom slab, along the horizontal edges and the longitudinal edges on both sides; vertical channels are arranged at intervals on the top surface of the upper flaps along the long axis; The external hanging plate includes a transverse prefabricated plate and a transverse outer cladding layer; the bottom of the transverse prefabricated plate is supported on the top of the transverse side of the upper flap; a first bottom blind hole is arranged at the bottom of the transverse prefabricated plate, corresponding to the position of the vertical channel, and a first overflow hole and a first grouting hole are arranged in sequence from top to bottom at the lower part of the inner side surface of the transverse prefabricated plate, corresponding to the first bottom blind hole; the first overflow hole and the first grouting hole are both connected to the second bottom blind hole; the transverse prefabricated plate is connected to the upper flap by a first dowel and grouting material; the top of the transverse prefabricated plate is supported on the bottom of the upper balcony plate; a first top blind hole is reserved at the top of the transverse prefabricated plate, corresponding to the first bottom blind hole, and the transverse prefabricated plate is connected to the upper balcony plate by a first dowel and grouting material; The transverse outer cladding layer covers the outer side of the transverse prefabricated board, the bottom of the transverse outer cladding layer exceeds the bottom of the transverse prefabricated board, and the exceeding part covers the upper part of the outer side of the upper flap of the prefabricated bottom plate; the top of the transverse outer cladding layer exceeds the top of the transverse prefabricated board, and the exceeding part covers the lower part of the outer side of the upper flap of the upper prefabricated bottom plate; There are two side hanging plates, which are arranged on both sides of the outer hanging plate respectively; the side hanging plate includes a longitudinal prefabricated plate and a longitudinal outer cladding layer; the bottom of the longitudinal prefabricated plate is supported on the top of the longitudinal edge of the upper flap; a second bottom blind hole is arranged at the bottom of the longitudinal prefabricated plate, corresponding to the position of the vertical channel; a second overflow hole and a second grouting hole are arranged in sequence from top to bottom at the lower part of the inner side surface of the longitudinal prefabricated plate, corresponding to the second bottom blind hole; the second overflow hole and the second grouting hole are both connected to the second bottom blind hole; the longitudinal prefabricated plate is connected to the upper flap through a second dowel and grouting material; The top of the longitudinal prefabricated board is supported on the bottom of the upper balcony board; a second top blind hole is reserved at the top of the longitudinal prefabricated board and at the position corresponding to the second bottom blind hole, and the longitudinal prefabricated board and the upper balcony board are connected by a second dowel and grouting material; the side of the longitudinal prefabricated board close to the main structure is connected to the structural outer wall; the longitudinal outer cladding covers the outer side of the longitudinal prefabricated board; the bottom of the longitudinal outer cladding exceeds the bottom of the longitudinal prefabricated board, and the exceeding part covers the outer side of the upper part of the upper flap of the prefabricated bottom plate; the top of the longitudinal outer cladding exceeds the top of the longitudinal prefabricated board, and the exceeding part covers the lower part of the outer side of the upper flap of the upper prefabricated bottom plate; A bottom seat slurry layer is provided in the joint between the transverse precast board and the upper flap, and in the joint between the longitudinal precast board and the upper flap; a first horizontal sealing rod is filled on the outer side of the bottom seat slurry layer, a first horizontal blocking material is filled on the inner side of the bottom seat slurry layer, and a first waterproof mortar layer is filled on the inner side of the first horizontal blocking material; a bottom waterproof air-blocking membrane is affixed to the inner side of the joint between the transverse precast board and the upper flap, and to the inner side of the joint between the longitudinal precast board and the upper flap; a top seat slurry layer is provided in the joint between the transverse precast board and the upper balcony board, and in the joint between the longitudinal precast board and the upper balcony board, and a second horizontal sealing rod is filled on the outer side of the top seat slurry layer; a second horizontal blocking material is filled on the inner side of the top seat slurry layer, and a second waterproof mortar layer is filled on the inner side of the second horizontal blocking material; a top waterproof air-blocking membrane is affixed to the inner side of the joint between the transverse precast board and the upper balcony board, and to the inner side of the joint between the longitudinal precast board and the upper balcony board; The joints between the upper and lower adjacent transverse outer covering layers and the joints between the upper and lower adjacent longitudinal outer covering layers are filled from the inside to the outside with insulation strips, a third sealing rod and horizontal sealant; The joint between the side hanging plate and the outer hanging plate is wide in the middle and narrow inside and outside, and a filling mortar layer, an inner vertical sealing rod, a first thermal insulation filling layer, an outer vertical sealing rod and a vertical sealant are arranged in sequence from inside to outside in the joint; the first thermal insulation filling layer is filled in the wide seam in the middle; a vertical waterproof and air-proof membrane is attached to the inner side of the joint between the side hanging plate and the outer hanging plate; The top of the prefabricated bottom plate is paved with a balcony steel mesh, the bottom cast-in-place layer is cast on the top surface of the prefabricated bottom plate, and the top surface of the bottom cast-in-place layer is flush with the top surface of the upper flap.

[0007] Preferably, the floor slab adopts a composite floor slab; reserved steel bars are provided on the precast plate layer of the composite floor slab, on the side close to the cast-in-place beam; the reserved steel bars of the precast plate layer extend into the cast-in-place beam; reserved steel bars are provided on the precast bottom plate, on the side close to the cast-in-place beam; the reserved steel bars of the precast bottom plate extend into the cast-in-place beam; a composite layer steel mesh is laid in the composite layer of the floor slab; the composite layer steel mesh extends into the balcony steel mesh at the corresponding balcony and is cast in the bottom cast-in-place layer; the composite layer, cast-in-place beam and bottom cast-in-place layer of the floor slab are cast and formed at the same time.

[0008] Preferably, when the balcony slab is the bottom slab of the first-floor balcony, the balcony slab is a cantilever structure; The vertical channel is a blind hole; the first dowel bar is inserted in the vertical channel and the first bottom blind hole; the grouting material is poured in the first bottom blind hole and the vertical channel; the second dowel bar is inserted in the vertical channel and the second bottom blind hole; the grouting material is poured in the second bottom blind hole and the vertical channel; When the balcony slab is the bottom slab of a non-first-floor balcony, the bottom of the balcony slab is supported on the top of the external hanging plate and the side hanging plate; the vertical channel is a vertical through hole; the first dowel bar is inserted in the vertical channel and the first bottom blind hole, and the lower end of the first dowel bar extends into the first top blind hole at the top of the lower horizontal prefabricated plate; the grouting material is poured into the first bottom blind hole, the vertical channel and the first top blind hole at the top of the lower horizontal prefabricated plate; the second dowel bar is inserted in the vertical channel and the second bottom blind hole, and the lower end of the second dowel bar extends into the second top blind hole at the top of the lower longitudinal prefabricated plate; the grouting material is poured into the second bottom blind hole, the vertical channel and the second top blind hole at the top of the lower longitudinal prefabricated plate.

[0009] Preferably, when the balcony slab is the top slab of the top balcony; the vertical channel is a vertical through hole; the first dowel bar is inserted in the vertical channel and the first top blind hole on the top of the top horizontal prefabricated slab; the grouting material is poured in the first top blind hole and the vertical channel; the second dowel bar is inserted in the vertical channel and the second top blind hole; the grouting material is poured in the second top blind hole and the vertical channel.

[0010] Preferably, the transverse outer covering layer includes a transverse thermal insulation layer and a transverse outer blade; the top of the transverse thermal insulation layer exceeds the top of the transverse outer blade, and the bottom of the transverse outer blade exceeds the bottom of the transverse thermal insulation layer; the longitudinal outer covering layer includes a longitudinal thermal insulation layer and a longitudinal outer blade; the top of the longitudinal thermal insulation layer exceeds the top of the longitudinal outer blade, and the bottom of the longitudinal outer blade exceeds the bottom of the longitudinal thermal insulation layer.

[0011] Preferably, a vertical seam is left between the longitudinal prefabricated board and the structural outer wall; the vertical seam is filled with a caulking material; A gap is left between the longitudinal outer cladding layer and the structural outer wall, and a second thermal insulation filling layer is arranged in the gap.

[0012] A construction method for an assembled ultra-low energy consumption cantilevered closed balcony system comprises the following steps.

[0013] Step 1: construct the prefabricated base plate.

[0014] Step 2: Arrange the first dowel bar and the second dowel bar in the vertical channel of the prefabricated bottom plate.

[0015] Step three: measure and lay out.

[0016] Step 4: Installation of external panels and side panels. The specific method is as follows: Step 1: Install the first horizontal sealing rod along the horizontal edge and the longitudinal edges on both sides of the top outer side of the upper flap to ensure that the installation position of the first horizontal sealing rod is accurate and stable; set the first horizontal sealing material along the inner side of the top of the upper flap; and arrange insulation strips on the top of the lower horizontal outer layer and the lower longitudinal outer layer.

[0017] Step 2, installation of side hanging plates on both sides of the longitudinal edges of the prefabricated base plate: first install the side hanging plates on both sides of the prefabricated base plate, and correct and temporarily fix them in time after installation to ensure the verticality of the side hanging plates.

[0018] Step 3: Set a first thermal insulation filling layer on the side of the side panel close to the outer panel.

[0019] Step 4: Install the external panel, and perform correction and temporary fixation to ensure the verticality of the side panel.

[0020] Step 5: After the external panels and side panels are in place, measure and confirm the entirety of the external panels and side panels.

[0021] Step 6, after the construction of the exterior panels and side panels is completed, the construction of the inner vertical sealing rod and the filling mortar layer, the construction of the outer vertical sealing rod and the vertical sealant, and the construction of the third sealing rod and the horizontal sealant are carried out.

[0022] Step 7, carry out sealing and grouting of the joints between the prefabricated bottom plate of this layer and the external hanging plate and the side hanging plate as the construction progresses on the working surface: before the grouting construction, the inner side of the first horizontal sealing material is filled with a first waterproof mortar layer; then pressure grouting is carried out from the first grouting hole and the second grouting hole into the hole. The quality should be dense and full, until grouting is discharged from the first overflow hole and the second overflow hole.

[0023] Step 8, laying a balcony steel mesh on the top of the prefabricated bottom plate, pouring the bottom cast-in-place layer on the top surface of the prefabricated bottom plate, and the top surface of the bottom cast-in-place layer is flush with the top surface of the upper flap.

[0024] Step 5: a second horizontal sealing material is arranged along the inner side of the top of the transverse precast board and the longitudinal precast board, and a second waterproof mortar layer is filled inside the second horizontal sealing material; a second horizontal sealing rod is arranged on the outer side of the top of the transverse precast board and the longitudinal precast board.

[0025] Step six, install the upper prefabricated base plate: support the outer edge bottom of the upper prefabricated base plate on the top of the external hanging plate and the side hanging plate, and affix the top waterproof and air-tight membrane on the inner side of the joint between the external hanging plate and the upper prefabricated base plate, as well as on the inner side of the joint between the side hanging plate and the upper prefabricated base plate.

[0026] Step seven, repeat the process of step two to step six until the upper prefabricated bottom plate at the top of the top balcony is completed, and pour grouting material into the vertical channel of the upper prefabricated bottom plate at the top of the top balcony, and the construction is completed.

[0027] Preferably, when the balcony slab is the bottom slab of the first floor balcony, the vertical channel is a blind hole; the first dowel bar is inserted in the vertical channel and the first bottom blind hole; the second dowel bar is inserted in the vertical channel and the second bottom blind hole; the bottom seat slurry layer is constructed integrally with the grouting material in the vertical channel, the first bottom blind hole and the second bottom blind hole; When the balcony slab is the bottom slab of a non-first-floor balcony, the vertical channel is a vertical through hole; the first dowel bar is inserted in the vertical channel, the first bottom blind hole and the first top blind hole at the top of the lower horizontal precast slab; the second dowel bar is inserted in the vertical channel, the second bottom blind hole and the second top blind hole at the top of the lower longitudinal precast slab; the bottom seat slurry layer is constructed integrally with the grouting material in the vertical channel, the first bottom blind hole, the second bottom blind hole, the first top blind hole at the top of the lower horizontal precast slab and the second top blind hole at the top of the lower longitudinal precast slab.

[0028] Compared with the prior art, the present invention has the following characteristics and beneficial effects.

[0029] 1. In the construction of cantilevered enclosed balconies in a high-standard assembled ultra-low energy consumption residential project in a certain project, the present invention has developed an assembled ultra-low energy consumption cantilevered enclosed balcony system construction technology. This structure improves the component processing and production efficiency, installation and construction quality, and on-site construction efficiency, ensures the continuity of thermal insulation in the balcony area, ensures the overall air tightness of the balcony area, ensures the waterproofness of the hanging panels, etc.

[0030] 2. The assembled ultra-low energy consumption cantilevered closed balcony system in the present invention includes external hanging panels, side hanging panels and balcony panels, wherein the external hanging panels, side hanging panels and prefabricated bottom panels are assembled on site using lightweight prefabricated panels, which reduces the weight of the balcony area, improves installation efficiency, reduces the use time of the tower crane, saves the tower crane rental fee, and reduces costs; the bottom cast-in-place layer is constructed simultaneously with the cast-in-place beams and the cast-in-place floor slabs, which ensures the safety of the balcony force and improves the construction efficiency. In addition, the present invention effectively processes the joints of the prefabricated modules, the overall thermal insulation continuity of the balcony is good, the ultra-low energy consumption performance is good, the thermal insulation plugging, grouting plugging, mortar plugging and film sticking construction operations are simple and fast, and the air tightness of the balcony area is greatly improved.

[0031] 3. The connection between the prefabricated bottom plate and the lightweight external hanging plate and the side hanging plate in the present invention adopts the connection method of inserting bars + grouting, which has high component processing efficiency, fast installation, good connection quality, and larger installation error tolerance. The quality control method of balcony plate and external hanging plate installation and airtight sealing is also optimized and innovated. The joints between the external hanging plate, side hanging plate and balcony bottom plate are optimized, and the number of joints in the balcony area is reduced, which saves the sealing cost and improves the insulation and airtightness effect.

[0032] 4. The successful application of the construction technology of prefabricated ultra-low energy consumption sandwich insulation lightweight balcony external hanging board in this project has effectively solved the technical difficulties of the construction of enclosed balconies in prefabricated ultra-low energy consumption buildings, improved the construction quality and efficiency, and ensured the ultra-low energy consumption related performance. It has played a good demonstration role in similar ultra-low energy consumption building projects.

[0033] 5. The balcony external hanging board and side hanging board structure of the present invention adopts light aggregate concrete aggregate (C25 strength grade light aggregate ≤ R19KN / m³), which has the characteristics of light weight, thermal insulation and the like. The light aggregate hanging board is light and high-strength, which can reduce the load on the balcony area of ​​the building and improve the stability of the building. Light aggregate concrete has excellent thermal insulation performance at low density. The light aggregate itself is porous, so that the air circulation inside the concrete is smooth, which can effectively regulate the temperature, thereby improving the thermal insulation effect of the ultra-low energy consumption building.

[0034] 6. The construction process of the present invention is reasonable: when constructing the corresponding floors, the present invention constructs the prefabricated bottom plate: hoist the prefabricated bottom plate 3.1 to the corresponding floor, extend the reserved steel bars on the prefabricated bottom plate 3.1 into the cast-in-place beam, and construct it at the same time as the floor slab, and then construct the side hanging plate, external hanging plate and joints; during the main structure construction stage, the overall structure of the balcony area is analyzed for construction process, sequence, etc., and an efficient construction method is formulated. The application of the key technology of integrated construction of assembled ultra-low energy consumption lightweight composite thermal insulation balcony external hanging panels improves production efficiency, improves on-site installation construction efficiency, and further improves the relevant performance of ultra-low energy consumption buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a structural schematic diagram of the assembled ultra-low energy consumption cantilevered closed balcony system of the present invention.

[0037] Figure 2 It is a schematic diagram of the connection structure of vertically adjacent external panels in the present invention.

[0038] Figure 3 It is a structural schematic diagram of a bottom waterproof and air-tight membrane being affixed to the joint between the upper flap and the transverse prefabricated board and a top waterproof and air-tight membrane being affixed to the inner side of the joint between the transverse prefabricated board and the upper balcony board in the present invention.

[0039] Figure 4 It is a three-dimensional structural schematic diagram of the connection portion between the outer hanging plate and the side hanging plate in the present invention.

[0040] Figure 5 It is a structural schematic diagram of a first bottom blind hole provided at the bottom of the transverse prefabricated plate in the present invention.

[0041] Figure 6 It is a structural schematic diagram of a second bottom blind hole provided at the bottom of the longitudinal prefabricated plate in the present invention.

[0042] Figure 7 It is a schematic diagram of the planar structure of the connection portion between the outer hanging plate and the side hanging plate in the present invention.

[0043] Figure 8 It is a schematic diagram of the planar structure in which the balcony slab is arranged on the outside of the main structure floor slab in the present invention.

[0044] Figure numbers: 1-external hanging board, 1.1-horizontal precast board, 1.2-horizontal outer cladding, 1.2.1-horizontal insulation layer, 1.2.2-horizontal outer blade, 2-side hanging board, 2.1-longitudinal precast board, 2.2-longitudinal outer cladding, 2.2.1-longitudinal insulation layer, 2.2.2-longitudinal outer blade, 3-balcony board, 3.1-precast bottom board, 3.1.1-upper flip board, 3.2-bottom cast-in-place layer, 4-floor slab, 5-vertical channel, 6-first bottom blind hole, 7-first overflow hole, 8-first grouting hole, 9-first dowel, 10-first top blind hole, 11-second bottom blind hole, 12-second overflow hole, 13-second grouting hole, 14-second dowel, 15-second top blind hole, 16-structural exterior wall, 17-bottom seat slurry layer, 18-first horizontal sealing rod, 19-first horizontal sealing material, 20-first waterproof mortar layer, 21-bottom waterproof air-proof membrane, 22-top seat slurry layer, 23-second horizontal sealing rod, 24-second horizontal sealing material, 25-top waterproof air-proof membrane, 26-insulation strip, 27-third sealing rod, 28-filling mortar layer, 29-inner vertical sealing rod, 30-first insulation filling layer, 31-outer vertical sealing rod, 32-vertical sealant, 33-vertical waterproof air-proof membrane, 34-second insulation filling layer, 35-cast-in-place beam, 36-horizontal sealant, 37-second waterproof mortar layer. DETAILED DESCRIPTION

[0045] like Figure 1-8 As shown, this assembled ultra-low energy consumption cantilevered closed balcony system includes an exterior panel 1, a side panel 2 and a balcony panel 3; windows are arranged on the exterior panel 1 and / or the side panel 2; The balcony slab 3 is a composite slab, which is arranged at each floor slab of the main structure; a cast-in-place beam 35 is arranged at the edge of the floor slab 4; the balcony slab 3 includes a prefabricated bottom slab 3.1 and a bottom cast-in-place layer 3.2; the inner side of the prefabricated bottom slab 3.1 is connected to the cast-in-place beam 35 of the corresponding layer of the main structure; an upper flap 3.1.1 is arranged on the top of the prefabricated bottom slab 3.1, along the horizontal side and the longitudinal sides of both sides; vertical channels 5 are arranged at intervals on the top surface of the upper flap 3.1.1 along the long axis; The exterior panel 1 comprises a transverse prefabricated panel 1.1 and a transverse outer cladding layer 1.2; the bottom of the transverse prefabricated panel 1.1 is supported on the top of the transverse side of the upper flap 3.1.1; a first bottom blind hole 6 is provided at the bottom of the transverse prefabricated panel 1.1, corresponding to the position of the vertical channel 5, and a first overflow hole 7 and a first grouting hole 8 are provided in sequence from top to bottom at the lower part of the inner side surface of the transverse prefabricated panel 1.1, corresponding to the first bottom blind hole 6; the first overflow hole 7 and the first grouting hole 8 are both connected to the second bottom blind hole 11; the transverse prefabricated panel 1.1 is connected to the upper flap 3.1.1 through a first dowel 9 and grouting material; the top of the transverse prefabricated panel 1.1 is supported on the bottom of the upper balcony panel; a first top blind hole 10 is reserved at the top of the transverse prefabricated panel 1.1, corresponding to the first bottom blind hole 6, and the transverse prefabricated panel 1.1 is connected to the upper balcony panel through a first dowel 9 and grouting material; The transverse outer cladding layer 1.2 covers the outer side of the transverse precast plate 1.1, the bottom of the transverse outer cladding layer 1.2 exceeds the bottom of the transverse precast plate 1.1, and the exceeding part covers the upper outer side of the upper flap 3.1.1 of the precast bottom plate 3.1; the top of the transverse outer cladding layer 1.2 exceeds the top of the transverse precast plate 1.1, and the exceeding part covers the lower outer side of the upper flap 3.1.1 of the upper precast bottom plate; There are two side hanging plates 2, which are arranged on both sides of the outer hanging plate 1 respectively; the side hanging plate 2 includes a longitudinal precast plate 2.1 and a longitudinal outer cladding layer 2.2; the bottom of the longitudinal precast plate 2.1 is supported on the top of the longitudinal edge of the upper flap 3.1.1; a second bottom blind hole 11 is arranged at the bottom of the longitudinal precast plate 2.1, corresponding to the position of the vertical channel 5; a second overflow hole 12 and a second grouting hole 13 are arranged in sequence from top to bottom at the lower part of the inner side surface of the longitudinal precast plate 2.1, corresponding to the second bottom blind hole 11; the second overflow hole 12 and the second grouting hole 13 are both connected to the second bottom blind hole 11; the longitudinal precast plate 2.1 and the upper flap 3.1.1 are connected by a second dowel 14 and grouting material; The top of the longitudinal precast panel 2.1 is supported on the bottom of the upper balcony slab; a second top blind hole 15 is reserved at the top of the longitudinal precast panel 2.1, corresponding to the second bottom blind hole 11, and the longitudinal precast panel 2.1 is connected to the upper balcony slab via a second dowel 14 and grouting material; the side of the longitudinal precast panel 2.1 close to the main structure is connected to the structural outer wall 16; the longitudinal outer cladding 2.2 covers the outer side of the longitudinal precast panel 2.1; the bottom of the longitudinal outer cladding 2.2 exceeds the bottom of the longitudinal precast panel 2.1, and the exceeding part covers the upper outer side of the upper flap 3.1.1 of the precast bottom slab 3.1; the top of the longitudinal outer cladding 2.2 exceeds the top of the longitudinal precast panel 2.1, and the exceeding part covers the lower outer side of the upper flap 3.1.1 of the upper precast bottom slab; A bottom slurry layer 17 is provided in the joint between the transverse precast panel 1.1 and the upper flap 3.1.1 and in the joint between the longitudinal precast panel 2.1 and the upper flap 3.1.1; a first horizontal sealing rod 18 is filled on the outside of the bottom slurry layer 17, a first horizontal sealing material 19 is filled on the inside of the bottom slurry layer 17, and a first waterproof mortar layer 20 is filled on the inside of the first horizontal sealing material 19; a bottom waterproof mortar layer 20 is affixed to the inner side of the joint between the transverse precast panel 1.1 and the upper flap 3.1.1 and the inner side of the joint between the longitudinal precast panel 2.1 and the upper flap 3.1.1. Air-isolating membrane 21; a top slurry layer 22 is provided in the joint between the horizontal precast board 1.1 and the upper balcony board and in the joint between the longitudinal precast board 2.1 and the upper balcony board, and a second horizontal sealing rod 23 is filled on the outside of the top slurry layer 22; a second horizontal sealing material 24 is filled on the inside of the top slurry layer 22, and a second waterproof mortar layer 37 is filled on the inside of the second horizontal sealing material 24; a top waterproof air-isolating membrane 25 is attached to the inside of the joint between the horizontal precast board 1.1 and the upper balcony board and the inside of the joint between the longitudinal precast board 2.1 and the upper balcony board; The joints between the upper and lower adjacent transverse outer covering layers 1.2 and the joints between the upper and lower adjacent longitudinal outer covering layers 2.2 are filled from the inside out with insulation strips 26, third sealing rods 27 and horizontal sealant 36; The joint between the side hanging plate 2 and the outer hanging plate 1 is wide in the middle and narrow inside and outside, and a filling mortar layer 28, an inner vertical sealing rod 29, a first thermal insulation filling layer 30, an outer vertical sealing rod 31 and a vertical sealant 32 are sequentially arranged in the joint from inside to outside; the first thermal insulation filling layer 30 is filled in the wide seam in the middle; a vertical waterproof and air-proof membrane 33 is attached to the inner side of the joint between the side hanging plate 2 and the outer hanging plate 1; The top of the prefabricated bottom plate 3.1 is paved with a balcony steel mesh, and the bottom cast-in-place layer 3.2 is cast on the top surface of the prefabricated bottom plate 3.1, and the top surface of the bottom cast-in-place layer 3.2 is flush with the top surface of the upper flap 3.1.1.

[0046] In this embodiment, the floor slab 4 adopts a composite floor slab; reserved steel bars are provided on the precast plate layer of the composite floor slab, on the side close to the cast-in-place beam 35; the reserved steel bars of the precast plate layer extend into the cast-in-place beam 35; reserved steel bars are provided on the precast bottom plate 3.1, on the side close to the cast-in-place beam 35; the reserved steel bars of the precast bottom plate 3.1 extend into the cast-in-place beam 35; a composite layer steel mesh is laid in the composite layer of the floor slab 4; the composite layer steel mesh extends into the balcony steel mesh at the corresponding balcony and is cast in the bottom cast-in-place layer 3.2; the composite layer of the floor slab 4, the cast-in-place beam 35 and the bottom cast-in-place layer 3.2 are cast and formed at the same time.

[0047] In this embodiment, when the balcony slab 3 is the bottom slab of the first-floor balcony, the balcony slab 3 is a cantilever structure; The vertical channel 5 is a blind hole; the first dowel bar 9 is inserted in the vertical channel 5 and the first bottom blind hole 6; the grouting material is poured in the first bottom blind hole 6 and the vertical channel 5; the second dowel bar 14 is inserted in the vertical channel 5 and the second bottom blind hole 11; the grouting material is poured in the second bottom blind hole 11 and the vertical channel 5; When the balcony slab 3 is the bottom slab of a non-first-floor balcony, the bottom of the balcony slab 3 is supported on the top of the exterior panel 1 and the side panel 2; the vertical channel 5 is a vertical through hole; the first dowel bar 9 is inserted in the vertical channel 5 and the first bottom blind hole 6, and the lower end of the first dowel bar 9 extends into the first top blind hole 10 at the top of the lower horizontal precast plate; the grouting material is poured into the first bottom blind hole 6, the vertical channel 5 and the first top blind hole 10 at the top of the lower horizontal precast plate; the second dowel bar 14 is inserted in the vertical channel 5 and the second bottom blind hole 11, and the lower end of the second dowel bar 14 extends into the second top blind hole 15 at the top of the lower longitudinal precast plate; the grouting material is poured into the second bottom blind hole 11, the vertical channel 5 and the second top blind hole 15 at the top of the lower longitudinal precast plate.

[0048] In this embodiment, when the balcony slab 3 is the top slab of the top balcony; the vertical channel 5 is a vertical through hole; the first dowel bar 9 is inserted in the vertical channel 5 and the first top blind hole 10 at the top of the top horizontal prefabricated plate; the grouting material is poured in the first top blind hole 10 and the vertical channel 5; the second dowel bar 14 is inserted in the vertical channel 5 and the second top blind hole 15; the grouting material is poured in the second top blind hole 15 and the vertical channel 5.

[0049] In this embodiment, the transverse outer envelope 1.2 includes a transverse thermal insulation layer 1.2.1 and a transverse outer blade 1.2.2; the top of the transverse thermal insulation layer 1.2.1 exceeds the top of the transverse outer blade 1.2.2, and the bottom of the transverse outer blade 1.2.2 exceeds the bottom of the transverse thermal insulation layer 1.2.1; the longitudinal outer envelope 2.2 includes a longitudinal thermal insulation layer 2.2.1 and a longitudinal outer blade 2.2.2; the top of the longitudinal thermal insulation layer 2.2.1 exceeds the top of the longitudinal outer blade 2.2.2, and the bottom of the longitudinal outer blade 2.2.2 exceeds the bottom of the longitudinal thermal insulation layer 2.2.1.

[0050] In this embodiment, the transverse outer blade 1.2.2 and the longitudinal outer blade 2.2.2 are both made of lightweight concrete slabs and lightweight aggregate concrete aggregates (C25 strength grade lightweight aggregate ≤ R19KN / m³), and the transverse precast slab 1.1 and the longitudinal precast slab 2.1 are both made of lightweight concrete slabs and lightweight aggregate concrete aggregates (C25 strength grade lightweight aggregate ≤ R19KN / m³).

[0051] Of course, in other embodiments, the transverse outer blades 1.2.2 and the longitudinal outer blades 2.2.2 can also be made of PVC boards; the transverse prefabricated boards 1.1 and the longitudinal prefabricated boards 2.1 can also be made of lightweight PVC boards or plywood.

[0052] A vertical joint is left between the longitudinal prefabricated panel 2.1 and the structural outer wall 16, and the width of the vertical joint is 20 mm; the vertical joint is filled with a filler; the filler is a sealant or cement mortar; a gap is left between the longitudinal outer cladding layer 2.2 and the structural outer wall 16, and a second thermal insulation filling layer 34 is arranged in the gap.

[0053] In this embodiment, the joint between the side hanging panel 2 and the external hanging panel 1 is wide in the middle and narrow inside and outside, and a filling mortar layer 28, an inner vertical sealing rod 29, a first thermal insulation filling layer 30, an outer vertical sealing rod 31 and a vertical sealant 32 are arranged in sequence in the joint from the inside to the outside; the first thermal insulation filling layer 30 is filled in the wide seam in the middle; a vertical waterproof and air-proof membrane 33 is affixed to the inner side of the joint between the side hanging panel 2 and the external hanging panel 1; the bottom cast-in-place layer 3.2 is cast on the top surface of the prefabricated bottom plate 3.1, and the top surface of the bottom cast-in-place layer 3.2 is flush with the top surface of the upper flap 3.1.1.

[0054] In this embodiment, the horizontal section of the transverse insulation layer 1.2.1 is U-shaped, wrapped around the outer surface and the side surfaces of the transverse prefabricated board 1.1; the horizontal section of the transverse outer blade 1.2.2 is U-shaped, wrapped around the outer surface and the side surfaces of the transverse insulation layer 1.2.1, and the two ends of the transverse outer blade 1.2.2 respectively exceed the two ends of the transverse insulation layer 1.2.1, and the two ends of the transverse prefabricated board 1.1 are respectively flush with the two ends of the transverse outer blade 1.2.2; The outer side of the longitudinal outer blade 2.2.2 exceeds the outer side of the longitudinal insulation layer 2.2.1, and the outer side of the longitudinal prefabricated board 2.1 is flush with the outer side of the longitudinal outer blade 2.2.2; the joint width between the longitudinal prefabricated board 2.1 and the transverse prefabricated board 1.1 is 20mm; the joint width between the transverse insulation layer 1.2.1 and the longitudinal insulation layer 2.2.1 is 60mm; the joint width between the transverse outer blade 1.2.2 and the longitudinal outer blade 2.2.2 is 20mm; An insulation filling layer 30 is filled in the joint between the transverse insulation layer 1.2.1 and the longitudinal insulation layer 2.2.1; the inner vertical sealing rod 29 is filled in the joint between the longitudinal prefabricated board 2.1 and the transverse prefabricated board 1.1, close to the side of the first insulation filling layer 30; the filling mortar layer 28 is filled in the joint inside the inner vertical sealing rod 29; the outer vertical sealing rod 31 and the vertical sealant 32 are filled in the joint between the transverse outer blade 1.2.2 and the longitudinal outer blade 2.2.2 from the inside to the outside.

[0055] In this embodiment, the transverse insulation layer 1.2.1 and the longitudinal insulation layer 2.2.1 both use rigid foam polyurethane + vacuum insulation board + rigid foam polyurethane integrated sandwich insulation, and the insulation strip 26, the first insulation filling layer 30 and the second insulation filling layer 34 use composite insulation strips made of the same material as the transverse insulation layer 1.2.1 or the longitudinal insulation layer 2.2.1.

[0056] In this embodiment, the spacing between adjacent vertical channels 5 is not greater than 1000 mm; the height of the upper flap 3.1.1 is not less than 300 mm.

[0057] The construction method of this assembled ultra-low energy consumption cantilevered closed balcony system includes the following steps.

[0058] Step 1: construct the prefabricated bottom plate 3.1: hoist the prefabricated bottom plate 3.1 to the corresponding construction floor, and extend the reserved steel bars on the prefabricated bottom plate 3.1 into the cast-in-place beam 35.

[0059] If the prefabricated bottom plate 3.1 is the first-floor balcony bottom plate, when hoisting the prefabricated bottom plate 3.1, set temporary supports at the bottom of the prefabricated bottom plate 3.1 in advance, then hoist the balcony plate to the corresponding floor position, and drop it vertically. After the balcony plate is installed, it is marked and checked, and the adjustable supports under the plate are adjusted to make temporary fixation.

[0060] If the prefabricated bottom plate 3.1 is not the bottom plate of the balcony on the first floor, the prefabricated bottom plate 3.1 is hoisted to the top of the external hanging plate 1 and the side hanging plate 2; Step 2: Arrange the first dowel bars 9 and the second dowel bars 14 in the vertical channel 5 of the prefabricated bottom plate 3.1.

[0061] Step three, measurement and layout: before the construction of the external hanging board 1 and the side hanging board 2, clean the ground of the corresponding floor, and have a professional surveyor lay out the measurement and positioning control axis, the positioning edge line of the horizontal precast board 1.1 and the longitudinal precast board 2.1, and the 200mm control line, and mark them. At the same time, use a leveling instrument to check the floor elevation +500mm elevation line and +1000mm horizontal line to adjust and ensure the verticality and elevation of the components; review the reserved vertical steel bars, check whether the reserved steel bar position, verticality, and reserved steel bar length are accurate, correct the steel bars that do not meet the requirements, and adjust the offset inserted bars in time.

[0062] Step 4: Installation of the external panel 1 and the side panel 2; the specific method is as follows.

[0063] Step 1, install the first horizontal sealing rod 18 along the horizontal edge and the longitudinal edges on both sides of the top outer side of the upper flap 3.1.1. The first horizontal sealing rod 18 adopts a PE rod to ensure that the installation position of the first horizontal sealing rod 18 is accurate and stable; set the first horizontal sealing material 19 along the inner side of the top of the upper flap 3.1.1; at the same time, arrange the insulation strip 26 on the top of the lower horizontal outer layer and the lower longitudinal outer layer.

[0064] Step 2, installation of the side hanging plates 2 on the longitudinal edges of both sides of the prefabricated base plate 3.1: first install the side hanging plates 2 on both sides of the prefabricated base plate 3.1, and correct and temporarily fix them in time after installation; each side hanging plate 2 requires two long and two short, a total of four diagonal supports, and the diagonal support rods of the prefabricated wall are installed on the bolt connectors on the prefabricated wall and the floor slab 4 with bolts, and adjusted through the adjustable diagonal supports to ensure the verticality of the side hanging plates 2.

[0065] Step 3, set the first thermal insulation filling layer 30 on the side of the side panel 2 close to the external panel 1: before installing the external panel 1, evenly apply the customized first thermal insulation filling layer 30 with foam material and install it to the side of the longitudinal outer layer 2.2 of the side panel 2 to ensure that the first thermal insulation filling layer 30 is not easy to detach during the component installation process.

[0066] Step 4, install the external panel 1, and perform correction and temporary fixation to ensure that the side panel 2 is vertical.

[0067] Step 5, after the external panel 1 and the side panel 2 are in place, measure and confirm the external panel 1 and the side panel 2 as a whole; the measurement indicators include height, position, and tilt; the adjustment sequence is height → position → tilt.

[0068] Step 6, after the construction of the exterior panel 1 and the side panel 2 is completed, the inner vertical sealing rod 29 and the filling mortar layer 28, the outer vertical sealing rod 31 and the vertical sealant 32, and the third sealing rod 27 and the horizontal sealant 36 are constructed; the inner vertical sealing rod 29 adopts a foamed polyethylene rod, and the filling mortar layer 28 adopts a flexible mortar to fill the construction. The sealing construction should be dense and full to avoid affecting the subsequent grouting construction.

[0069] Step 7, carry out the sealing and grouting of the joints between the prefabricated bottom plate 3.1 of this layer and the external hanging plate 1 and the side hanging plate 2 as the construction progresses on the working surface: before the grouting construction, the inner side of the first horizontal sealing material 19 is filled with a first waterproof mortar layer 20; then pressure grouting is performed from the first grouting hole 8 and the second grouting hole 13 into the hole. The quality should be dense and full until the grouting comes out of the first overflow hole 7 and the second overflow hole 12.

[0070] Step 8, construction of the bottom cast-in-place layer 3.2: carry out reinforcement construction and concrete pouring construction of the balcony slab overlap layer, cast the bottom cast-in-place layer 3.2 on the top surface of the prefabricated bottom plate 3.1, and the top surface of the bottom cast-in-place layer 3.2 is flush with the top surface of the upper flap 3.1.1; the bottom cast-in-place layer 3.2 and the cast-in-place layer of the floor slab 4 and the cast-in-place beam 35 are cast and formed at the same time.

[0071] Step five, a second horizontal sealing material 24 is set on the inner side of the top of the transverse precast panel 1.1 and the longitudinal precast panel 2.1, and a second waterproof mortar layer 37 is filled on the inner side of the second horizontal sealing material 24; a second horizontal sealing rod 23 is set on the outer side of the top of the transverse precast panel 1.1 and the longitudinal precast panel 2.1, and a PE rod is used for the second horizontal sealing rod 23 to ensure that the installation position of the second horizontal sealing rod 23 is accurate and stable.

[0072] Step six, install the upper prefabricated base plate: support the bottom of the outer edge of the upper prefabricated base plate on the top of the external hanging plate 1 and the side hanging plate 2, and stick the top waterproof and vapor-isolating membrane 25 on the inner side of the joint between the external hanging plate 1 and the upper prefabricated base plate, as well as on the inner side of the joint between the side hanging plate 2 and the upper prefabricated base plate; use special glue for construction, and the glue thickness is uniform within the film-pasting range; the film-pasting construction is flat, firmly bonded, and free of hollows. The vapor-isolating membrane must ensure that the overlap length between membranes is ≥100mm, and the overlap length between membranes and structural surfaces is ≥100mm.

[0073] Step seven, repeat the process of step two to step six until the upper prefabricated bottom plate at the top of the top balcony is completed, and pour grouting material into the vertical channel 5 of the upper prefabricated bottom plate at the top of the top balcony, and the construction is completed.

[0074] In this embodiment, when the balcony slab 3 is the bottom slab of the first floor balcony, the vertical channel 5 is a blind hole; the first dowel bar 9 is inserted in the vertical channel 5 and the first bottom blind hole 6; the second dowel bar 14 is inserted in the vertical channel 5 and the second bottom blind hole 11; the bottom seat slurry layer 17 is constructed integrally with the grouting material in the vertical channel 5, the first bottom blind hole 6 and the second bottom blind hole 11; When the balcony slab 3 is the bottom slab of a non-first-floor balcony, the vertical channel 5 is a vertical through hole; the first dowel bar 9 is inserted in the vertical channel 5, the first bottom blind hole 6 and the first top blind hole 10 at the top of the lower horizontal precast plate; the second dowel bar 14 is inserted in the vertical channel 5, the second bottom blind hole 11 and the second top blind hole 15 at the top of the lower longitudinal precast plate; the bottom seat slurry layer 17 is integrally constructed with the grouting material in the vertical channel 5, the first bottom blind hole 6, the second bottom blind hole 11, the first top blind hole 10 at the top of the lower horizontal precast plate and the second top blind hole 15 at the top of the lower longitudinal precast plate.

[0075] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The above embodiments are intended to illustrate the present invention rather than to limit the protection scope of the present invention. All applications derived from simple variations of the present invention fall within the protection scope of the present invention.

Claims

1. An assembled ultra-low energy consumption cantilevered closed balcony system, characterized by: It comprises an exterior hanging plate (1), a side hanging plate (2) and a balcony plate (3); The balcony slab (3) is a composite slab, which is arranged at each floor slab of the main structure; a cast-in-place beam (35) is arranged at the edge of the floor slab (4); the balcony slab (3) comprises a prefabricated bottom slab (3.1) and a bottom cast-in-place layer (3.2); the inner side of the prefabricated bottom slab (3.1) is connected to the cast-in-place beam (35) of the corresponding layer of the main structure; an upper flap (3.1.1) is arranged on the top of the prefabricated bottom slab (3.1) and along the horizontal side and the longitudinal sides of both sides; vertical channels (5) are arranged at intervals on the top surface of the upper flap (3.1.1) along the long axis; The exterior panel (1) comprises a transverse prefabricated panel (1.1) and a transverse outer cladding layer (1.2); the bottom of the transverse prefabricated panel (1.1) is supported on an upper flap ( 3.1.1); a first bottom blind hole (6) is provided at the bottom of the transverse precast plate (1.1) at a position corresponding to the vertical channel (5); a first overflow hole (7) and a first grouting hole (8) are provided in sequence from top to bottom at the lower part of the inner side surface of the transverse precast plate (1.1) at a position corresponding to the first bottom blind hole (6); the first overflow hole (7) and the first grouting hole (8) are both connected to the second bottom blind hole (11); the transverse precast plate (1.1) and the upper flap (3.1.1) are connected via a first dowel (9) and grouting material; the top of the transverse precast plate (1.1) is supported on the bottom of the upper balcony plate; a first top blind hole (10) is reserved at the top of the transverse precast plate (1.1) at a position corresponding to the first bottom blind hole (6), and the transverse precast plate (1.1) and the upper balcony plate are connected via a first dowel (9) and grouting material; The transverse outer cladding (1.2) covers the outer side of the transverse prefabricated plate (1.1), the bottom of the transverse outer cladding (1.2) exceeds the bottom of the transverse prefabricated plate (1.1), and the exceeding portion covers the upper outer side of the upper flap (3.1.1) of the prefabricated bottom plate (3.1); the top of the transverse outer cladding (1.2) exceeds the top of the transverse prefabricated plate (1.1), and the exceeding portion covers the lower outer side of the upper flap (3.1.1) of the upper prefabricated bottom plate; The side hanging panels (2) are in two pieces, and are arranged on both sides of the outer hanging panel (1) respectively; the side hanging panel (2) comprises a longitudinal prefabricated panel (2.1) and a longitudinal outer cladding layer (2.2); the bottom of the longitudinal prefabricated panel (2.1) is supported on the upper flap ( 3.1.1); a second bottom blind hole (11) is provided at the bottom of the longitudinal precast plate (2.1) at a position corresponding to the vertical channel (5); a second grouting hole (12) and a second grouting hole (13) are provided in sequence from top to bottom at the lower part of the inner side surface of the longitudinal precast plate (2.1) at a position corresponding to the second bottom blind hole (11); the second grouting hole (12) and the second grouting hole (13) are both connected to the second bottom blind hole (11); the longitudinal precast plate (2.1) and the upper flap (3.1.1) are connected via a second dowel (14) and grouting material; The top of the longitudinal precast plate (2.1) is supported on the bottom of the upper balcony plate; a second top blind hole (15) is reserved at the top of the longitudinal precast plate (2.1) and at a position corresponding to the second bottom blind hole (11), and the longitudinal precast plate (2.1) and the upper balcony plate are connected via a second dowel (14) and grouting material; the side of the longitudinal precast plate (2.1) close to the main structure is connected to the structural outer wall (16); the longitudinal outer cladding (2.2) covers the outer side of the longitudinal precast plate (2.1); the bottom of the longitudinal outer cladding (2.2) exceeds the bottom of the longitudinal precast plate (2.1), and the exceeding portion covers the upper outer side of the upper flap (3.1.1) of the precast bottom plate (3.1); the top of the longitudinal outer cladding (2.2) exceeds the top of the longitudinal precast plate (2.1), and the exceeding portion covers the lower outer side of the upper flap (3.1.1) of the upper precast bottom plate; A bottom seat slurry layer (17) is provided in the joint between the transverse precast plate (1.1) and the upper flap (3.1.1) and in the joint between the longitudinal precast plate (2.1) and the upper flap (3.1.1); a first horizontal sealing rod (18) is filled on the outside of the bottom seat slurry layer (17), a first horizontal sealing material (19) is filled on the inside of the bottom seat slurry layer (17), and a first waterproof mortar layer (20) is filled on the inside of the first horizontal sealing material (19); a bottom seat slurry layer (17) is provided on the inside of the joint between the transverse precast plate (1.1) and the upper flap (3.1.1) and in the joint between the longitudinal precast plate (2.1) and the upper flap (3.1.1). A waterproof and air-proof membrane (21); a top seat slurry layer (22) is provided in the joint between the transverse precast plate (1.1) and the upper balcony plate, and in the joint between the longitudinal precast plate (2.1) and the upper balcony plate, and a second horizontal sealing rod (23) is filled on the outside of the top seat slurry layer (22); a second horizontal sealing material (24) is filled on the inside of the top seat slurry layer (22), and a second waterproof mortar layer (37) is filled on the inside of the second horizontal sealing material (24); a top waterproof and air-proof membrane (25) is attached to the inside of the joint between the transverse precast plate (1.1) and the upper balcony plate, and in the inside of the joint between the longitudinal precast plate (2.1) and the upper balcony plate; The joints between the upper and lower adjacent transverse outer covering layers (1.2) and the joints between the upper and lower adjacent longitudinal outer covering layers (2.2) are filled from the inside out with insulation strips (26), third sealing rods (27) and horizontal sealant (36); The joint between the side hanging plate (2) and the outer hanging plate (1) is wide in the middle and narrow inside and outside, and a filling mortar layer (28), an inner vertical sealing rod (29), a first thermal insulation filling layer (30), an outer vertical sealing rod (31) and a vertical sealant (32) are arranged in sequence from the inside to the outside in the joint; the first thermal insulation filling layer (30) is filled in the wide joint in the middle; a vertical waterproof and air-proof membrane (33) is attached to the inner side of the joint between the side hanging plate (2) and the outer hanging plate (1); A balcony steel mesh is laid on the top of the prefabricated bottom plate (3.1), and the bottom cast-in-place layer (3.2) is cast on the top surface of the prefabricated bottom plate (3.1), and the top surface of the bottom cast-in-place layer (3.2) is flush with the top surface of the upper flap (3.1.1).

2. The assembled ultra-low energy consumption cantilevered closed balcony system according to claim 1 is characterized in that: The floor slab (4) is a composite floor slab; reserved steel bars are provided on a side of the precast slab layer of the composite floor slab close to the cast-in-place beam (35); the reserved steel bars of the precast slab layer extend into the cast-in-place beam (35); reserved steel bars are provided on a side of the precast bottom slab (3.1) close to the cast-in-place beam (35); the reserved steel bars of the precast bottom slab (3.1) extend into the cast-in-place beam (35); a composite layer steel mesh is laid in the composite layer of the floor slab (4); the composite layer steel mesh extends into the balcony steel mesh at the corresponding balcony and is cast in the bottom cast-in-place layer (3.2); the composite layer of the floor slab (4), the cast-in-place beam (35) and the bottom cast-in-place layer (3.2) are cast and formed simultaneously.

3. The assembled ultra-low energy consumption cantilevered closed balcony system according to claim 1 is characterized by: When the balcony slab (3) is the bottom slab of the first-floor balcony, the balcony slab (3) is a cantilever structure; The vertical channel (5) is a blind hole; the first dowel bar (9) is inserted into the vertical channel (5) and the first bottom blind hole (6); grouting material is poured into the first bottom blind hole (6) and the vertical channel (5); the second dowel bar (14) is inserted into the vertical channel (5) and the second bottom blind hole (11); grouting material is poured into the second bottom blind hole (11) and the vertical channel (5); When the balcony slab (3) is the bottom slab of a balcony other than the first floor, the bottom of the balcony slab (3) is supported on the top of the external hanging slab (1) and the side hanging slab (2); the vertical channel (5) is a vertical through hole; the first dowel bar (9) is inserted into the vertical channel (5) and the first bottom blind hole (6), and the lower end of the first dowel bar (9) extends into the first top blind hole (10) at the top of the lower horizontal precast slab; grouting material is poured into the first bottom blind hole (6), the vertical channel (5) and the first top blind hole (10) at the top of the lower horizontal precast slab; the second dowel bar (14) is inserted into the vertical channel (5) and the second bottom blind hole (11), and the lower end of the second dowel bar (14) extends into the second top blind hole (15) at the top of the lower longitudinal precast slab; grouting material is poured into the second bottom blind hole (11), the vertical channel (5) and the second top blind hole (15) at the top of the lower longitudinal precast slab.

4. The assembled ultra-low energy consumption cantilevered closed balcony system according to claim 1 is characterized in that: When the balcony slab (3) is the top slab of the top balcony; the vertical channel (5) is a vertical through hole; the first dowel bar (9) is inserted into the vertical channel (5) and the first top blind hole (10) at the top of the top transverse prefabricated slab; grouting material is poured into the first top blind hole (10) and the vertical channel (5); the second dowel bar (14) is inserted into the vertical channel (5) and the second top blind hole (15); grouting material is poured into the second top blind hole (15) and the vertical channel (5).

5. The assembled ultra-low energy consumption cantilevered closed balcony system according to claim 1 is characterized in that: The transverse outer envelope (1.2) comprises a transverse thermal insulation layer (1.2.1) and a transverse outer blade (1.2.2); the top of the transverse thermal insulation layer (1.2.1) exceeds the top of the transverse outer blade (1.2.2), and the bottom of the transverse outer blade (1.2.2) exceeds the bottom of the transverse thermal insulation layer (1.2.1); the longitudinal outer envelope (2.2) comprises a longitudinal thermal insulation layer (2.2.1) and a longitudinal outer blade (2.2.2); the top of the longitudinal thermal insulation layer (2.2.1) exceeds the top of the longitudinal outer blade (2.2.2), and the bottom of the longitudinal outer blade (2.2.2) exceeds the bottom of the longitudinal thermal insulation layer (2.2.1).

6. The assembled ultra-low energy consumption cantilevered closed balcony system according to claim 1 is characterized in that: A vertical seam is left between the longitudinal prefabricated plate (2.1) and the structural outer wall (16); a seam filler is filled in the vertical seam; a gap is left between the longitudinal outer cladding layer (2.2) and the structural outer wall (16), and a second thermal insulation filling layer (34) is provided in the gap.

7. A construction method for the assembled ultra-low energy consumption cantilevered closed balcony system according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: construct the prefabricated base plate (3.1); Step 2: arranging a first dowel bar (9) and a second dowel bar (14) in the vertical channel (5) of the prefabricated bottom plate (3.1); Step 3: Measure and lay out; Step 4: Installation of the external panel (1) and the side panel (2). The specific method is as follows: Step 1, installing a first horizontal sealing rod (18) along the horizontal edge and the longitudinal edges on both sides of the top outer side of the upper flap (3.1.1) to ensure that the first horizontal sealing rod (18) is installed accurately and stably; setting a first horizontal plugging material (19) along the top inner side of the upper flap (3.1.1); and arranging a heat preservation strip (26) on the top of the lower horizontal outer layer and the lower longitudinal outer layer; Step 2, installation of the side hanging plates (2) on the longitudinal edges of both sides of the prefabricated bottom plate (3.1): first install the side hanging plates (2) on both sides of the prefabricated bottom plate (3.1), and perform correction and temporary fixation in time after installation to ensure that the side hanging plates (2) are vertical; Step 3, providing a first thermal insulation filling layer (30) on the side of the side hanging plate (2) close to the outer hanging plate (1); Step 4, installing the external hanging plate (1), and correcting and temporarily fixing it to ensure that the side hanging plate (2) is vertical; Step 5, after the outer panel (1) and the side panel (2) are in place, the outer panel (1) and the side panel (2) are measured and confirmed as a whole; Step 6, after the construction of the exterior panel (1) and the side panel (2) is completed, the construction of the inner vertical sealing rod (29) and the filling mortar layer (28), the construction of the outer vertical sealing rod (31) and the vertical sealant (32), and the construction of the third sealing rod (27) and the horizontal sealant (36) are carried out; Step 7, sealing and grouting the joints between the prefabricated bottom plate (3.1) and the external hanging plate (1) and the side hanging plate (2) are carried out as the construction progresses on the working surface: before the grouting construction, a first waterproof mortar layer (20) is filled on the inner side of the first horizontal plugging material (19); then, pressure grouting is performed into the holes from the first grouting hole (8) and the second grouting hole (13); the quality of the grouting should be dense and full until the first overflow hole (7) and the second overflow hole (12) are filled with grout; Step 8, laying a balcony steel mesh on the top of the prefabricated bottom plate (3.1), casting the bottom cast-in-place layer (3.2) on the top surface of the prefabricated bottom plate (3.1), and the top surface of the bottom cast-in-place layer (3.2) is flush with the top surface of the upper flap (3.1.1); Step 5: a second horizontal sealing material (24) is arranged along the entire length of the inner side of the top of the transverse precast plate (1.1) and the longitudinal precast plate (2.1), and a second waterproof mortar layer (37) is filled inside the second horizontal sealing material (24); a second horizontal sealing rod (23) is arranged on the outer side of the top of the transverse precast plate (1.1) and the longitudinal precast plate (2.1); Step 6, installing the upper prefabricated bottom plate: supporting the outer edge bottom of the upper prefabricated bottom plate on the top of the external hanging plate (1) and the side hanging plate (2), and affixing a top waterproof and air-proof membrane (25) on the inner side of the joint between the external hanging plate (1) and the upper prefabricated bottom plate and the inner side of the joint between the side hanging plate (2) and the upper prefabricated bottom plate; Step 7, repeat the process from step 2 to step 6 until the upper prefabricated bottom plate at the top of the top balcony is completed, and pour grouting material into the vertical channel (5) of the upper prefabricated bottom plate at the top of the top balcony, and the construction is completed.

8. The construction method of the assembled ultra-low energy consumption cantilevered closed balcony system according to claim 7 is characterized by: When the balcony slab (3) is the bottom slab of a first-floor balcony, the vertical channel (5) is a blind hole; the first dowel bar (9) is inserted in the vertical channel (5) and the first bottom blind hole (6); the second dowel bar (14) is inserted in the vertical channel (5) and the second bottom blind hole (11); the bottom seat slurry layer (17) is constructed integrally with the grouting material in the vertical channel (5), the first bottom blind hole (6) and the second bottom blind hole (11); When the balcony slab (3) is the bottom slab of a balcony other than the first floor, the vertical channel (5) is a vertical through hole; the first dowel bar (9) is inserted into the vertical channel (5), the first bottom blind hole (6) and the first top blind hole (10) at the top of the lower transverse precast slab; the second dowel bar (14) is inserted into the vertical channel (5), the second bottom blind hole (11) and the second top blind hole (15) at the top of the lower longitudinal precast slab; the bottom seat slurry layer (17) is constructed integrally with the grouting material in the vertical channel (5), the first bottom blind hole (6), the second bottom blind hole (11), the first top blind hole (10) at the top of the lower transverse precast slab and the second top blind hole (15) at the top of the lower longitudinal precast slab.

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