A construction method for prefabricated cantilever beam balconies

Abstract

This invention belongs to the field of building construction technology, specifically a construction method for a prefabricated cantilever beam balcony, including: S1: Installing the balcony beam: Installing the longitudinal beam onto the composite beam, and then installing the transverse beam onto the longitudinal beam; S2: Installing the balcony slab: Installing the composite balcony slab onto the balcony beam, and then installing the connected reinforcing bars, followed by laying the cast-in-place beam and cast-in-place layer; S3: Installing the concrete slab: Installing the insert block under the concrete slab into the positioning groove on the balcony beam, and then placing the connecting column between the concrete slabs so that the connecting block on the concrete slab is inserted into the connecting column, and then inserting the fixing rod into the connecting column so that the fixing rod passes through the fixing groove on the connecting block; the diameter of the fixing rod gradually decreases from top to bottom. This invention enables the various components of the balcony to be connected and locked together, facilitating the transportation and assembly of the balcony, ensuring the safety of the balcony assembly process, and improving the overall load-bearing performance of the balcony.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically a construction method for prefabricated cantilever beam balconies. Background Technology

[0002] A balcony is an extension of the interior of a building, a place for residents to breathe fresh air, dry clothes, and place potted plants. Its design needs to take into account both practicality and aesthetics. Balconies are generally divided into three types: cantilevered, recessed, and corner. Balconies not only allow residents to receive sunlight, absorb fresh air, exercise outdoors, enjoy the view, cool off, and dry clothes, but if arranged well, they can also become a pleasant little garden.

[0003] The existing precast cantilever balcony slabs, cantilever beams, and front sealing beams are precast and cast as a whole. This requires complex mold making, as well as hoisting formwork and steel reinforcement binding before pouring can be carried out. This makes it impossible to achieve automated industrial production, resulting in low production efficiency, difficulty in manufacturing, inconvenience in transportation and stacking, high manufacturing costs, and slow production speed, which is not conducive to achieving automated production. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, enable the various components of a balcony to be connected and locked together, facilitate the transportation and assembly of the balcony, ensure the safety of the balcony assembly process, and improve the overall load-bearing performance of the balcony, this invention proposes a construction method for a prefabricated cantilever beam balcony.

[0005] The technical solution adopted by this invention to solve its technical problem is: a construction method for a prefabricated cantilever beam balcony, the construction method comprising the following steps:

[0006] S1: Install balcony beams: First, install the longitudinal beams onto the composite beams using anchor rods, and then install the transverse beams onto the longitudinal beams using anchor rods.

[0007] S2: Installing the balcony slab: First, install the balcony composite slab into the frame formed by the balcony beams. Then, install the connecting reinforcing bars on the balcony composite slab and the floor composite slab. After that, lay the cast-in-place beam on the composite beam so that the reinforcing bars pass through the cast-in-place beam. Finally, lay the cast-in-place layer on the balcony composite slab and the floor composite slab respectively so that the reinforcing bars are embedded in the cast-in-place layer.

[0008] S3: Install concrete slabs: First, install the insert blocks under the concrete slabs into the positioning grooves on the balcony beams. Then, place the connecting columns between the concrete slabs so that the connecting blocks on the concrete slabs are inserted into the connecting columns. After that, insert the fixing rods into the connecting columns so that the fixing rods pass through the fixing grooves on the connecting blocks. The diameter of the fixing rods gradually decreases from top to bottom.

[0009] The balcony beam is provided with lifting rings evenly distributed on its upper surface, and the connecting block with a fixing groove on the concrete slab acts as a lifting ring.

[0010] An insertion block is provided on the lower surface of the concrete slab, and a positioning groove is provided on the upper surface of the balcony beam. The insertion block and the positioning groove are matched with each other.

[0011] Connecting blocks are installed on the left and right sides of the concrete slab. The connecting blocks on the opposite sides of two adjacent concrete slabs are staggered. The connecting column has three adjacent sides with mounting grooves. The connecting blocks are inserted into the mounting grooves. The connecting column is used to connect concrete slabs that are parallel or perpendicular to each other.

[0012] Preferably, a download platform is provided at the end of the longitudinal beam away from the composite beam, and upper pressure platforms are provided at both ends of the cross beam. The cross beam is mounted on the download platform of the longitudinal beam through the upper pressure platforms.

[0013] The surface of the downloading platform is provided with an inclined surface, the end of the inclined surface near the longitudinal beam is lower than the end of the inclined surface away from the longitudinal beam, and the downloading platform and the upper pressure platform are matched with each other.

[0014] In step S1, the crossbeam is first hoisted and placed onto the longitudinal beam, and then the anchor rod is installed for fixed connection.

[0015] Preferably, a rotating rod is rotatably mounted in the fixed rod, a release groove is provided at the lower end of the fixed rod, and an elastic plate is installed at the lower end of the rotating rod, with the elastic plate extending out from the notch of the release groove;

[0016] A baffle is installed at the upper end of the rotating rod, and the baffle is closed at the opening at the upper end of the connecting column. The elastic sheet is initially wound and installed on the rotating rod.

[0017] In step S3, the fixing rod is inserted into the connecting column and then the rotating rod is rotated to gradually extend the wound elastic sheet and protrude from the release groove.

[0018] Preferably, the lower surface of the concrete slab is provided with a receiving groove, the sidewall of the receiving groove serves as an insertion block, and the height of the insertion block is greater than the depth of the positioning groove;

[0019] The lifting ring on the balcony beam is inserted into the receiving groove. A positioning hole is provided on the side wall of the receiving groove. A limiting rod is inserted into the positioning hole. The limiting rod passes through the lifting ring. One end of the limiting rod is tapered and has an interference fit with the mounting hole.

[0020] Preferably, a sealing plate is installed in the mounting groove, and cement mortar is poured into the connecting column;

[0021] The sealing plate is installed in any one of the mounting slots on the connecting column.

[0022] Preferably, the lower end of the mounting groove is connected to the receiving groove, and the cement mortar injected into the connecting column will enter the receiving groove.

[0023] Preferably, the longitudinal beams and transverse beams are provided with mounting holes, the diameter of which is larger than the diameter of the anchor rod. The upper pressure platform is provided with an injection hole, the upper end of which is connected to the interior of the connecting column. The upper pressure platform and lower pressure platform are provided with mutually cooperating connecting grooves. The injection hole is connected to the mounting holes on the longitudinal beams and transverse beams through the connecting grooves. The cement mortar injected into the connecting column will enter the mounting hole.

[0024] Preferably, multiple sets of the lifting rings are evenly installed along the length of the balcony beam, and each set of the lifting rings is arranged in pairs along the width of the balcony beam.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. The construction method of the prefabricated cantilever beam balcony described in this invention enables the various components of the balcony to be assembled and combined by setting longitudinal beams, transverse beams, balcony composite slabs, concrete slabs, connecting blocks, fixing grooves, connecting columns, and fixing rods, thereby reducing the space occupied by the balcony, facilitating the assembly and transportation of the balcony, and ensuring that the components are firmly locked together after the balcony is assembled, making the balcony structure stable and solid, thus ensuring good overall load-bearing performance of the balcony and ensuring safety during the assembly process.

[0027] 2. The construction method of the prefabricated cantilever beam balcony described in this invention involves setting a fixed rod, a release groove, a rotating rod, and an elastic plate. After the fixed rod passes through the fixed groove on each connecting block, the rotating rod is rotated to unfold the rolled elastic plate and extend it from the release groove, so as to lock the fixed rod and the fixed groove, preventing the fixed rod from being accidentally pulled out or automatically popped out, which would affect the stability of the balcony structure after assembly and thus create safety hazards.

[0028] 3. The construction method of the prefabricated cantilever beam balcony described in this invention, by setting up a lifting ring, a receiving groove, and a limiting rod, allows the lifting ring to be inserted into the receiving groove on the concrete slab. Then, the lifting ring and the limiting rod cooperate with each other to further fix the concrete slab, improving the safety of the balcony assembly process. At the same time, the lifting ring can be reused after the balcony beam is hoisted without dismantling, thereby reducing the number of steps in the balcony assembly process, speeding up the assembly efficiency of the balcony, and reducing the generation of waste. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Figure 1 This is a flowchart of the construction method of the present invention;

[0031] Figure 2 This is a three-dimensional view of the cantilever beam balcony in the construction method of this invention;

[0032] Figure 3 This is a sectional view of the cantilever beam balcony in the construction method of this invention;

[0033] Figure 4 This is a perspective view of the concrete slab on the cantilever beam balcony of the present invention;

[0034] Figure 5 This is a partial sectional view of the concrete slab connection in the cantilever beam balcony of the present invention;

[0035] Figure 6 This is a schematic diagram of the connecting column in the cantilever beam balcony of the present invention; the three mounting slots in the figure are all equipped with closed plates as examples;

[0036] Figure 7 This is a schematic diagram of the longitudinal beam in the cantilever balcony of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the crossbeam in the cantilever balcony of the present invention;

[0038] Figure 9 This is a structural schematic diagram of the connection between the horizontal beam and the longitudinal beam in the cantilever beam balcony of the present invention;

[0039] Figure 10 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0040] Figure 11 yes Figure 5 Enlarged view of a section at point B in the middle;

[0041] Figure 12 yes Figure 5 Enlarged view of a section at point C;

[0042] Figure 13 yes Figure 6 Enlarged view of a section at point D;

[0043] In the diagram: Composite beam 1, Cast-in-place beam 11, Composite floor slab 12, Cast-in-place layer 13, Balcony beam 2, Longitudinal beam 21, Positioning groove 211, Lifting ring 212, Download platform 213, Horizontal beam 22, Upper pressure platform 221, Balcony composite slab 23, Reinforcing bar 231, Mounting hole 24, Connecting groove 241, Injection hole 242, Anchor rod 25, Concrete slab 3, Connecting block 31, Fixing groove 311, Receiving groove 32, Insertion block 321, Limiting rod 33, Connecting column 4, Mounting groove 41, Closing plate 411, Fixing rod 42, Release groove 421, Rotating rod 422, Elastic sheet 423, Baffle 43. Detailed Implementation

[0044] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0045] like Figures 1 to 13 As shown, the present invention discloses a construction method for a prefabricated cantilever beam balcony, the construction method comprising the following steps:

[0046] S1: Install balcony beam 2: First, install the longitudinal beam 21 onto the composite beam 1 through the anchor rod 25, and then install the transverse beam 22 onto the longitudinal beam 21 through the anchor rod 25.

[0047] S2: Install the balcony slab: First, install the balcony composite slab 23 into the frame formed by the balcony beam 2. Then, install the connecting reinforcing bars 231 on the balcony composite slab 23 and the floor composite slab 12. After that, lay the cast-in-place beam 11 on the composite beam 1, so that the reinforcing bars 231 pass through the cast-in-place beam 11. Finally, lay the cast-in-place layer 13 on the balcony composite slab 23 and the floor composite slab 12 respectively, so that the reinforcing bars 231 are embedded in the cast-in-place layer 13.

[0048] S3: Install concrete slab 3: First, install the insertion block 321 below the concrete slab 3 into the positioning groove 211 on the balcony beam 2. Then, place the connecting column 4 between the concrete slabs 3, so that the connecting block 31 on the concrete slab 3 is inserted into the connecting column 4. After that, insert the fixing rod 42 into the connecting column 4, so that the fixing rod 42 passes through the fixing groove 311 on the connecting block 31. The diameter of the fixing rod 42 gradually decreases from top to bottom.

[0049] Among them, the upper surface of the balcony beam 2 is evenly provided with lifting rings 212, and the connecting block 31 with the fixing groove 311 on the concrete slab 3 acts as a lifting ring.

[0050] An insertion block 321 is provided on the lower surface of the concrete slab 3, and a positioning groove 211 is provided on the upper surface of the balcony beam 2. The insertion block 321 and the positioning groove 211 are matched with each other.

[0051] Connecting blocks 31 are installed on the left and right sides of the concrete slab 3. The connecting blocks 31 on the opposite sides of two adjacent concrete slabs 3 are staggered. The connecting column 4 has three adjacent sides with mounting grooves 41. The connecting blocks 31 are inserted into the mounting grooves 41. The connecting column 4 is used to connect concrete slabs 3 that are parallel and perpendicular to each other.

[0052] The longitudinal beam 21 is installed on the composite beam 1 through anchor rod 25, and the transverse beam 22 is also installed on the longitudinal beam 21 through anchor rod 25. Then, the longitudinal beam 21 will be embedded in the cast-in-place beam 11, so that the longitudinal beam 21, the composite beam 1, and the cast-in-place beam 11 become a whole, improving the structural stability and overall load-bearing performance of the balcony. At the same time, the reinforcing bars 231 are installed on the balcony composite slab 23 and the floor composite slab 12, and the cast-in-place layer 13 is laid, further making the balcony and the building a whole, improving the structural firmness and overall load-bearing performance of the prefabricated cantilever beam balcony.

[0053] Meanwhile, because the longitudinal beams 21, transverse beams 22, balcony composite slabs 23, concrete slabs 3 and connecting columns 4 are combined with each other, the various parts of the cantilever balcony can be separated from each other, which facilitates the transportation and assembly of the cantilever balcony and avoids the large space occupied by the cantilever balcony as an integral unit, which is inconvenient for transportation and hoisting assembly.

[0054] Meanwhile, a positioning groove 211 is opened on the balcony beam 2 so that the concrete slab 3 can be accurately and stably installed on the balcony beam 2 through the insertion block 321, avoiding the concrete slab 3 from tilting, shaking or tipping over, and preventing safety hazards during the assembly process. At the same time, the cooperation between the insertion block 321 and the positioning groove 211 can also ensure the accuracy of the installation of the concrete slab 3. After the balcony composite slab 23 and the concrete slab 3 are installed, the cast-in-place layer 13 will further fix the concrete slab 3 and the connecting column 4, ensuring that the structure of the cantilever beam balcony is firm and stable.

[0055] Meanwhile, since the connecting column 4 has an installation groove 41 on three adjacent sides, the connecting column 4 can be used to connect two adjacent parallel or perpendicular concrete slabs 3, making the connecting column 4 applicable to the connection of concrete slabs 3 in various places, reducing the number of parts required for the assembly of the cantilever beam balcony.

[0056] Meanwhile, after the connecting blocks 31 on the adjacent concrete slabs 3 are inserted into the mounting slots 41 on the connecting columns 4, the fixing rods 42 are inserted into the connecting columns 4, so that the fixing rods 42 pass through the fixing slots 311 on each connecting block 31, fixing the two adjacent concrete slabs 3 to each other, preventing the concrete slabs 3 from detaching from the connecting columns 4 again, ensuring the structural firmness and stability of the cantilever beam balcony after assembly, as well as the safety during the assembly process, preventing the concrete slabs 3 from shaking or falling, affecting the safety of construction personnel and on-site machinery and equipment. At the same time, since the upper diameter of the fixing rods 42 is relatively large, the two adjacent concrete slabs 3 will be brought closer to each other under the action of the fixing rods 42.

[0057] Meanwhile, the sequential installation of longitudinal beams 21, transverse beams 22, balcony composite slabs 23, and concrete slabs 3 makes the assembly process of the cantilever beam balcony convenient and quick, and ensures the structural stability and firmness of the cantilever beam balcony during the assembly process, avoiding safety accidents such as component separation and falling.

[0058] In one embodiment of the present invention, a download platform 213 is provided at the end of the longitudinal beam 21 away from the composite beam 1, and an upper pressure platform 221 is provided at both ends of the transverse beam 22. The transverse beam 22 is mounted on the download platform 213 of the longitudinal beam 21 through the upper pressure platform 221.

[0059] The surface of the download platform 213 is provided with an inclined surface, the end of the inclined surface near the longitudinal beam 21 is lower than the end of the inclined surface away from the longitudinal beam 21, and the download platform 213 and the upper pressure platform 221 are matched with each other.

[0060] In step S1, the crossbeam 22 is first hoisted and placed onto the longitudinal beam 21, and then the anchor rod 25 is installed for fixed connection.

[0061] By placing the crossbeam 22 on the download platform 213, the crossbeam 22 can be stably stressed during the assembly process, ensuring that the structure composed of the longitudinal beam 21 and the crossbeam 22 is stable and firm, and avoiding misalignment of the crossbeam 22, which would affect the subsequent fixed connection of the anchor rod 25 to the longitudinal beam 21 and the crossbeam 22.

[0062] Meanwhile, since the surface of the download platform 213 is provided with an inclined surface, after the crossbeam 22 is placed on the download platform 213 through the upper pressure platform 221, the crossbeam 22 will be affected by the inclined surface, causing the crossbeam 22 to tend to be close to the longitudinal beam 21. This ensures that the crossbeam 22 and the longitudinal beam 21 can be in close contact, which facilitates the fixed connection of the anchor rod 25 to the longitudinal beam 21 and the crossbeam 22. At the same time, it prevents the crossbeam 22 from relatively shaking or sliding, which would cause the crossbeam 22 to slip off the longitudinal beam 21 before being fixedly connected by the anchor rod 25, affecting the assembly of the cantilever beam balcony and causing safety accidents during the assembly process, affecting the safety of on-site personnel and equipment.

[0063] In one embodiment of the present invention, a rotating rod 422 is rotatably mounted in the fixed rod 42, a release groove 421 is provided at the lower end of the fixed rod 42, and an elastic piece 423 is installed at the lower end of the rotating rod 422, with the elastic piece 423 extending out from the notch of the release groove 421.

[0064] A baffle 43 is installed at the upper end of the rotating rod 422. The baffle 43 is installed in a closed manner at the opening at the upper end of the connecting column 4. The elastic sheet 423 is initially wound and installed on the rotating rod 422.

[0065] In step S3, the fixing rod 42 is inserted into the connecting post 4 and then the rotating rod 422 is rotated so that the wound elastic sheet 423 gradually extends and protrudes from the release groove 421.

[0066] After the fixing rod 42 passes through the fixing groove 311 on each connecting block 31, the two adjacent concrete slabs 3 will be fixed to each other, so that the connecting block 31 on the concrete slab 3 can no longer be pulled out from the connecting column 4, ensuring that the structure of the concrete slab 3 is firm and stable after installation.

[0067] Meanwhile, after the fixing rod 42 passes through the fixing groove 311, the workers will rotate the rotating rod 422 inside the fixing rod 42 using the baffle 43, so that the elastic sheet 423 wrapped on the rotating rod 422 will gradually loosen and unfold. The unfolded elastic sheet 423 will extend out from the release groove 421 on the fixing rod 42, so that the extended elastic sheet 423 locks the fixing rod 42 and the fixing groove 311, preventing the fixing rod 42 from being accidentally pulled out or squeezed upward due to the large diameter of the upper end of the fixing rod 42, which would cause the connection between the concrete slabs 3 to be unstable, and the concrete slabs 3 to wobble relative to each other, creating a safety hazard.

[0068] In one embodiment of the present invention, a receiving groove 32 is provided on the lower surface of the concrete slab 3, and the side wall of the receiving groove 32 serves as an insertion block 321, the height of the insertion block 321 being greater than the depth of the positioning groove 211.

[0069] The lifting ring 212 on the balcony beam 2 is inserted into the receiving groove 32. The receiving groove 32 has a positioning hole on its side wall. A limiting rod 33 is inserted into the positioning hole. The limiting rod 33 passes through the lifting ring 212. One end of the limiting rod 33 is tapered and has an interference fit with the mounting hole 24.

[0070] During the assembly of the cantilever balcony, the balcony beam 2 is hoisted using the hoisting ring 212. After the balcony beam 2 is assembled, the concrete slab 3 is installed on the balcony beam 2. The hoisting ring 212 on the balcony beam 2 then enters the receiving groove 32 on the concrete slab 3. A limiting rod 33 is then installed on the side wall of the receiving groove 32 and passes through the hoisting ring 212 to further fix the concrete slab 3 and the balcony beam 2, ensuring the structural stability and firmness of the assembled concrete slab 3 and ensuring the overall stability of the cantilever balcony structure.

[0071] Meanwhile, since the lifting ring 212 enters the receiving groove 32 and the lifting ring 212 and the limiting rod 33 cooperate to further fix the concrete slab 3, the lifting ring 212 on the balcony beam 2 does not need to be removed after the lifting, thereby reducing the procedures in the assembly of the cantilever beam balcony and improving the construction efficiency of the cantilever beam balcony assembly.

[0072] In one embodiment of the present invention, a sealing plate 411 is installed in the mounting groove 41, and cement mortar is poured into the connecting column 4;

[0073] The sealing plate 411 is installed in any one of the mounting slots 41 on the connecting column 4;

[0074] Because the upper diameter of the fixing rod 42 is relatively large, the concrete slabs 3 connected to the connecting column 4 are close to each other and the concrete slabs 3 are tightly attached to the surface of the connecting column 4. Therefore, when cement mortar is poured into the connecting column 4, the cement mortar is not easy to leak from the gap between the concrete slab 3 and the connecting column 4, ensuring that the cement mortar can stay stably in the connecting column 4. This allows the fixing rod 42, the connecting columns 4 on both sides of the concrete slab 3, and the connecting columns 4 to be fixedly connected as a whole, further ensuring that the structure of the concrete slab 3 is firm and stable after assembly, and improving the overall load-bearing performance of the cantilever beam balcony.

[0075] Meanwhile, since the mounting grooves 41 are opened on the three adjacent sides of the connecting column 4, there is an empty mounting groove 41 on the connecting column 4 after the concrete slab 3 is installed. Therefore, a sealing plate 411 is installed in one of the mounting grooves 41 on the connecting column 4 to seal the mounting groove 41 and prevent leakage from the empty mounting groove 41 when the cement mortar is poured, which would affect the filling and curing of the cement mortar.

[0076] Meanwhile, since the connecting post 4 has three mounting slots 41, the amount of material used in the connecting post 4 is reduced, and only one sealing plate 411 is installed, reducing the amount of sealing plate 411 used, the production cost of the connecting post 4 can be reduced.

[0077] Meanwhile, as another implementation, the sealing plate 411 can be replaced with concrete template paper or plastic sheet. The template paper can be directly pasted onto the surface of the connecting column 4 or the plastic sheet can be inserted into the mounting groove 41 to complete the sealing of one of the mounting grooves 41.

[0078] In one embodiment of the present invention, the lower end of the mounting groove 41 is connected to the receiving groove 32, and the cement mortar poured into the connecting column 4 will enter the receiving groove 32.

[0079] By connecting the installation groove 41 and the receiving groove 32, the cement mortar will also enter the receiving groove 32 during the process of pouring cement mortar into the connecting column 4. This will embed the limiting rod 33 and the lifting ring 212 in the receiving groove 32 into the cement mortar, further improving the structural firmness and stability between the concrete slab 3 and the balcony beam 2, avoiding safety hazards during assembly. At the same time, it can also prevent the limiting rod 33 from sliding relatively in the lifting ring 212 due to the relatively large space in the lifting ring 212, which would affect the fixed connection effect of the concrete slab 3 and prevent safety hazards.

[0080] In one embodiment of the present invention, mounting holes 24 are provided in the longitudinal beam 21 and the transverse beam 22. The diameter of the mounting holes 24 is larger than the diameter of the anchor rod 25. An injection hole 242 is provided on the upper pressure platform 221. The upper end of the injection hole 242 is connected to the interior of the connecting column 4. The upper pressure platform 221 and the lower pressure platform 213 are provided with mutually cooperating connecting grooves 241. The injection hole 242 is interconnected with the mounting holes 24 on the longitudinal beam 21 and the transverse beam 22 through the connecting grooves 241. The cement mortar injected into the connecting column 4 will enter the mounting hole 24.

[0081] By opening mounting holes 24 with a diameter larger than that of the anchor rod 25, it is easier for the anchor rod 25 to pass through the mounting holes 24, and the possibility of the anchor rod 25 getting stuck when passing through the mounting holes 24 is reduced, thus facilitating the installation of the anchor rod 25. At the same time, after the anchor rod 25 is installed, during the process of grouting cement mortar in the connecting column 4, the cement mortar will enter from the injection hole 242, and then enter the mounting holes 24 on the longitudinal beam 21 and the transverse beam 22 through the connecting groove 241, filling the gap between the mounting holes 24 and the anchor rod 25, so that the anchor rod 25 is fixed in position in the balcony beam 2, preventing the anchor rod 25 from shifting, further improving the fixed connection effect of the longitudinal beam 21 and the transverse beam 22, and improving the structural firmness and stability of the balcony beam 2, so that the overall stress performance of the cantilever beam balcony is good.

[0082] In one embodiment of the present invention, multiple sets of the lifting rings 212 are evenly installed along the length direction of the balcony beam 2, and each set of the lifting rings 212 is arranged in pairs along the width direction of the balcony beam 2.

[0083] Because the lifting rings 212 are set in pairs, after the limiting rod 33 is inserted into the lifting ring 212, the two lifting rings 212 will be close to the two ends of the limiting rod 33 respectively. This will keep the limiting rod 33 as horizontal as possible relative to the upper surface of the balcony beam 2, and avoid the situation where there is only one stress point between the limiting rod 33 and the lifting ring 212 when only one lifting ring 212 is used. This will cause the limiting rod 33 to be prone to tilting or shifting, which will affect the structural firmness and stability of the concrete slab 3.

[0084] The specific workflow is as follows:

[0085] The longitudinal beam 21 is installed on the composite beam 1 through anchor rod 25, and the transverse beam 22 is also installed on the longitudinal beam 21 through anchor rod 25. Then, the longitudinal beam 21 will be embedded in the cast-in-place beam 11, so that the longitudinal beam 21, the composite beam 1, and the cast-in-place beam 11 become a whole. At the same time, the reinforcing bars 231 are installed on the balcony composite slab 23 and the floor composite slab 12, and the cast-in-place layer 13 is laid.

[0086] Meanwhile, the combination of longitudinal beams 21, transverse beams 22, balcony composite slabs 23, concrete slabs 3, and connecting columns 4 allows the various parts of the cantilever balcony to be separated from each other.

[0087] Meanwhile, a positioning groove 211 is opened on the balcony beam 2 so that the concrete slab 3 can be accurately and stably installed on the balcony beam 2 through the insertion block 321. After the balcony composite slab 23 and the concrete slab 3 are installed, the cast-in-place layer 13 will further fix the concrete slab 3 and the connecting column 4.

[0088] Meanwhile, since the connecting column 4 has mounting grooves 41 on three adjacent sides, the connecting column 4 can be used to connect two adjacent parallel or perpendicular concrete slabs 3, and the connecting column 4 can be used to connect concrete slabs 3 in various places.

[0089] Meanwhile, after the connecting block 31 on the adjacent concrete slab 3 is inserted into the mounting groove 41 on the connecting column 4, the fixing rod 42 is inserted into the connecting column 4, so that the fixing rod 42 passes through the fixing groove 311 on each connecting block 31, and fixes the two adjacent concrete slabs 3 to each other. At the same time, since the upper diameter of the fixing rod 42 is relatively large, the two adjacent concrete slabs 3 will be brought closer to each other under the action of the fixing rod 42.

[0090] Meanwhile, the sequential installation of longitudinal beams 21, transverse beams 22, balcony composite slabs 23, and concrete slabs 3 makes the assembly process of the cantilever beam balcony convenient and quick, and ensures the structural stability and firmness of the cantilever beam balcony during the assembly process.

[0091] By placing the crossbeam 22 on the download platform 213, the crossbeam 22 can be stably stressed during the assembly process;

[0092] Meanwhile, since the surface of the download platform 213 is provided with an inclined surface, after the crossbeam 22 is placed on the download platform 213 by the upper pressure platform 221, the crossbeam 22 will be affected by the inclined surface, causing the crossbeam 22 to tend to be close to the longitudinal beam 21. At the same time, it prevents the crossbeam 22 from wobbling or sliding, so that the crossbeam 22 will not slip off the longitudinal beam 21 before being fixedly connected by the anchor rod 25.

[0093] After the fixing rod 42 passes through the fixing groove 311 on each connecting block 31, the two adjacent concrete slabs 3 will be fixed together, so that the connecting block 31 on the concrete slab 3 can no longer be pulled out from the connecting column 4.

[0094] Meanwhile, after the fixing rod 42 passes through the fixing groove 311, the staff will use the baffle 43 to rotate the rotating rod 422 inside the fixing rod 42, so that the elastic sheet 423 wrapped on the rotating rod 422 will gradually loosen and unfold, and the unfolded elastic sheet 423 will extend out from the release groove 421 on the fixing rod 42.

[0095] During the assembly of the cantilever balcony, the balcony beam 2 is hoisted by the hoisting ring 212. After the balcony beam 2 is assembled, the concrete slab 3 is installed on the balcony beam 2, which causes the hoisting ring 212 on the balcony beam 2 to enter the receiving groove 32 on the concrete slab 3. Then, a limiting rod 33 is installed on the side wall of the receiving groove 32 and passes through the hoisting ring 212 to further fix the concrete slab 3 and the balcony beam 2.

[0096] Meanwhile, since the lifting ring 212 enters the receiving groove 32 and the lifting ring 212 and the limiting rod 33 cooperate with each other to further fix the concrete slab 3, the lifting ring 212 on the balcony beam 2 does not need to be removed after the lifting, reducing the procedures in the assembly process of the cantilever beam balcony.

[0097] Because the upper diameter of the fixing rod 42 is large, the concrete slabs 3 connected to the connecting column 4 are close to each other and the concrete slabs 3 are tightly attached to the surface of the connecting column 4. When cement mortar is poured into the connecting column 4, the cement mortar is not easy to leak from the gap between the concrete slab 3 and the connecting column 4. The fixing rod 42, the connecting column 4 on both sides of the concrete slab 3 and the connecting column 4 are fixedly connected into a whole, which further ensures that the structure of the concrete slab 3 is firm and stable after assembly.

[0098] Meanwhile, since mounting slots 41 are opened on three adjacent sides of the connecting column 4, there is an empty mounting slot 41 on the connecting column 4 after the concrete slab 3 is installed. Therefore, a sealing plate 411 is installed in one of the mounting slots 41 on the connecting column 4 to seal the mounting slot 41 and prevent leakage from the empty mounting slot 41 when cement mortar is poured.

[0099] Meanwhile, since the connecting post 4 has three mounting slots 41, the amount of material used in the connecting post 4 is reduced, and only one sealing plate 411 is installed, reducing the amount of sealing plate 411 used, the production cost of the connecting post 4 can be reduced.

[0100] Meanwhile, as another implementation, the sealing plate 411 can be replaced with concrete template paper or plastic sheet. The template paper can be directly pasted onto the surface of the connecting column 4 or the plastic sheet can be inserted into the mounting groove 41 to complete the sealing of one of the mounting grooves 41.

[0101] By connecting the installation groove 41 and the receiving groove 32, the cement mortar will also enter the receiving groove 32 during the process of pouring cement mortar into the connecting column 4, so that the limiting rod 33 and the lifting ring 212 in the receiving groove 32 are embedded in the cement mortar, further improving the structural firmness and stability between the concrete slab 3 and the balcony beam 2.

[0102] By opening an installation hole 24 with a diameter larger than that of the anchor rod 25, the installation of the anchor rod 25 is facilitated. At the same time, after the anchor rod 25 is installed, during the process of grouting cement mortar into the connecting column 4, the cement mortar will enter from the injection hole 242 and then enter the installation holes 24 on the longitudinal beam 21 and the transverse beam 22 through the connecting groove 241 to fill the gap between the installation hole 24 and the anchor rod 25.

[0103] Because the lifting rings 212 are set in pairs, after the limiting rod 33 is inserted into the lifting ring 212, the two lifting rings 212 will be close to the two ends of the limiting rod 33 respectively. This will keep the limiting rod 33 as horizontal as possible relative to the upper surface of the balcony beam 2, and avoid the situation where there is only one stress point between the limiting rod 33 and the lifting ring 212 when only one lifting ring 212 is used. This will cause the limiting rod 33 to be prone to tilting or shifting, which will affect the structural firmness and stability of the concrete slab 3.

[0104] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method for a prefabricated cantilever beam balcony, characterized in that: The construction method comprises the following steps: S1: installing the balcony beam (2): first, install the longitudinal beam (21) to the composite beam (1) through the anchor rod (25), and then install the cross beam (22) to the longitudinal beam (21) through the anchor rod (25); S2: installing the balcony plate: first, install the balcony composite plate (23) into the frame composed of the balcony beam (2), then install the connected stress-reinforcing bars (231) on the balcony composite plate (23) and the building composite plate (12), then lay the cast-in-place beam (11) on the composite beam (1) so that the stress-reinforcing bars (231) pass through the cast-in-place beam (11), and finally, lay the cast-in-place layer (13) on the balcony composite plate (23) and the building composite plate (12) respectively so that the stress-reinforcing bars (231) are embedded in the cast-in-place layer (13); S3: installing the concrete plate (3): first, install the insertion block (321) below the concrete plate (3) into the positioning groove (211) on the balcony beam (2), then place the connecting column (4) between the concrete plates (3) so that the connecting block (31) on the concrete plate (3) is inserted into the connecting column (4), then insert the fixing rod (42) into the connecting column (4) so that the fixing rod (42) passes through the fixing groove (311) on the connecting block (31); the diameter of the fixing rod (42) gradually decreases from top to bottom; Wherein, the upper surface of the balcony beam (2) is uniformly provided with a lifting ring (212), and the connecting block (31) provided with the fixing groove (311) on the concrete plate (3) serves as a lifting ring; The lower surface of the concrete plate (3) is provided with an insertion block (321), and the upper surface of the balcony beam (2) is provided with a positioning groove (211), and the insertion block (321) and the positioning groove (211) are matched with each other; The left and right sides of the concrete plate (3) are provided with connecting blocks (31), the connecting blocks (31) on the opposite sides of the adjacent two concrete plates (3) are staggered, the connecting column (4) is provided with an installation groove (41) on the adjacent three sides, the connecting block (31) is inserted into the installation groove (41), and the connecting column (4) is used for connecting the concrete plates (3) which are parallel to each other and perpendicular to each other; The end of the longitudinal beam (21) away from the composite beam (1) is provided with a download platform (213), and the two ends of the cross beam (22) are provided with an upper pressing platform (221), and the cross beam (22) is installed on the download platform (213) of the longitudinal beam (21) through the upper pressing platform (221); The surface of the download platform (213) is provided with an inclined surface, the end of the inclined surface close to the longitudinal beam (21) is lower than the end of the inclined surface away from the longitudinal beam (21), and the download platform (213) and the upper pressing platform (221) are matched with each other; In the S1 step, the cross beam (22) is first hoisted and placed on the longitudinal beam (21), and then the anchor rod (25) is installed for fixed connection. The rotating rod (422) is rotatably installed in the fixed rod (42), the lower end of the fixed rod (42) is provided with a release slot (421), the lower end of the rotating rod (422) is provided with an elastic sheet (423), and the elastic sheet (423) extends from the gap of the release slot (421); The upper end of the rotating rod (422) is provided with a baffle (43), the baffle (43) is closed and installed at the opening of the upper end of the connecting column (4), and the elastic sheet (423) is initially wound and installed on the rotating rod (422); In the S3 step, the fixed rod (42) is inserted into the connecting column (4), and then the rotating rod (422) is rotated, so that the wound elastic sheet (423) is gradually stretched and extends from the release slot (421); The lower surface of the concrete slab (3) is provided with a containing groove (32), the side wall of the containing groove (32) serves as an insertion block (321), and the height of the insertion block (321) is greater than the depth of the positioning groove (211); The hoisting ring (212) on the balcony beam (2) is inserted into the containing groove (32), the side wall of the containing groove (32) is provided with a positioning hole, a limiting rod (33) is inserted and installed in the positioning hole, the limiting rod (33) penetrates through the hoisting ring (212), one end of the limiting rod (33) is tapered, and the end is in interference fit with the mounting hole (24); The mounting groove (41) is provided with a closing plate (411), and the connecting column (4) is filled with cement mortar; The closing plate (411) is installed in any one mounting groove (41) of the connecting column (4); The longitudinal beam (21) and the cross beam (22) are provided with mounting holes (24), the diameter of the mounting hole (24) is greater than the diameter of the anchoring rod (25), the upper pressing table (221) is provided with an injection hole (242), the upper end of the injection hole (242) is communicated to the inside of the connecting column (4), the upper pressing table (221) and the lower pressing table (213) are provided with communicating grooves (241) matched with each other, the injection hole (242) is communicated with the mounting hole (24) on the longitudinal beam (21) and the cross beam (22) through the communicating grooves (241), and the cement mortar filled in the connecting column (4) can enter the mounting hole (24).

2. The construction method of the assembled cantilever beam balcony according to claim 1, characterized in that: The lower end of the mounting groove (41) is communicated with the containing groove (32), and the cement mortar filled in the connecting column (4) can enter the containing groove (32).

3. The construction method of the assembled cantilever beam balcony according to claim 1, characterized in that: The hoisting ring (212) is uniformly provided with a plurality of groups along the length direction of the balcony beam (2), and each group of the hoisting ring (212) is arranged in pairs along the width direction of the balcony beam (2).

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