Construction method of split prefabricated bay window system

Abstract

The application discloses a construction method of a split prefabricated bay window system, and the prefabricated bay window comprises a lower eaves plate arranged at the lower side of a window opening, a plurality of split wall plates installed on the lower eaves plate, and an upper eaves plate installed on the split wall plates, wherein the upper eaves plate is fixedly connected with the split wall plates through an adapter; the lower eaves plate, the upper eaves plate and the split wall plates are sealingly connected through a sealing and grouting mode at the installation gaps among the lower eaves plate, the upper eaves plate and the split wall plates; two groups of grouting pipes are pre-buried in the split wall plates; and the construction method comprises the steps of installing the lower eaves plate, installing the split wall plates, installing the upper eaves plate, integrally pouring the lower half part of a cast-in-situ beam, dry-wet combined connecting the upper eaves plate with the split wall plates, and pouring the upper half part of the cast-in-situ beam. The structure is a whole assembly type structure, is convenient to process, transport and install, reduces construction cost, and speeds up construction progress; the method guarantees the installation precision of the prefabricated bay window, improves the reliability of connection, avoids the defects of subsequent cracks, is simple and convenient to construct, and reduces the construction period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated building construction, in particular to a construction method of a split type prefabricated bay window system. BACKGROUND

[0002] Prefabricated buildings have the advantages of energy saving, green environmental protection, excellent component quality, good seismic performance, high construction efficiency, fast construction speed and the like, and are of great significance to the transformation of the real estate industry to a modern industry. As one of the important components of a building, the cast-in-place bay window formwork is expensive and inconvenient to construct, which does not conform to the prefabrication direction; the bay window system with the upper and lower cantilever plates cast in place and the partition wall plate prefabricated has certain improvement compared with the cast-in-place bay window, but still needs to spend a lot of formwork cost; the whole prefabricated bay window is too heavy, which is inconvenient to hoist and transport, especially for the super-long bay window with adjacent double houses and large window hole size, the whole prefabricated bay window is not convenient to realize. The application No. 201910738712.6 discloses a prefabricated bay window and a construction method, which comprises a bay window top plate, a bay window bottom plate, a bay window side plate and a coupling beam. The bay window top plate is provided with a horizontal cantilever distributed bay window top plate stress rib on both sides of the bay window top plate. The stress rib is connected to the coupling beam through a connecting piece. The one end of the bay window bottom plate is fixed on the wall below the window through a stress rib connecting assembly. The bay window top plate, the bay window bottom plate and the bay window side plate are connected to the coupling beam and the wall body through a tapered head nut connection and a sleeve reserved corresponding bottom plate sleeve hole plug-in connection head rib, respectively, to improve the assembly efficiency of the bay window top plate, the bay window bottom plate and the bay window side plate, the coupling beam and the wall body. The prefabricated bay window does not need to be cast in place, has high assembly efficiency and is fixed firmly. However, cracks are prone to occur in the grouting at the connection, which increases the risk of leakage of the joint and needs to be repaired and maintained later. SUMMARY

[0003] The present application aims to provide a construction method of a split type prefabricated bay window system. The whole structure is a prefabricated structure, which is convenient for processing, transportation and installation, reduces construction cost and speeds up construction progress. The method ensures the installation accuracy of the prefabricated bay window, improves the reliability of the connection, avoids the drawbacks of subsequent cracks, is simple and convenient to construct, and reduces the construction period.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A construction method of a split prefabricated bay window system, the prefabricated bay window comprising a lower sash plate arranged at the lower side of a window opening, a plurality of split wall plates installed on the lower sash plate, and an upper sash plate fixedly installed on the split wall plates, the upper sash plate being located above the window opening and fixedly connected with the split wall plates through an adapter; the lower sash plate, the upper sash plate and the split wall plates are connected in a sealed manner through a sealing grouting at the installation gap between them; two groups of grouting pipes are pre-buried in the split wall plates, one end of the two groups of grouting pipes is exposed on the back of the split wall plate, and the other end of the two groups of grouting pipes is exposed on the bottom surface or the top surface of the split wall plate respectively;

[0006] The construction method comprises the following steps:

[0007] Step one, install the lower sash plate of the starting layer (n layer) and cast the cast-in-place beam; set up a bottom support system below the installation position of the lower sash plate, release the edge line and control line of the lower sash plate, hoist the lower sash plate into position, fix the exposed anchoring steel bars of the lower sash plate with the reserved steel bars of the cast-in-place beam, and then perform overall cast-in-place operation;

[0008] Step two, install the split wall plate of the starting layer (n layer) and seal the grouting at the bottom of the split wall plate; release the edge line and control line of the split wall plate, hoist the split wall plate into position, adjust and fix the position of the split wall plate through a diagonal bracing system; clean the reserved grouting pipe part and the horizontal joint part of the split wall plate, seal the joints on both sides of the split wall plate interface with sealing material, after the sealing material reaches the strength and is sealed tightly, use a grouting machine to grout through the grouting pipe, start grouting from the horizontal joint, and continue until the grouting material overflows from the top of the vertical joint between the lower sash plate and the split wall plate, and finally seal the grouting pipe;

[0009] Step three, install the upper sash plate of the starting layer (n layer) and the laminated plate of the starting layer (n layer) at the same time; set up a vertical support system, release the elevation control line, depth control line and lateral control line for installing the upper sash plate, and hoist the upper sash plate and the laminated plate onto the vertical support system;

[0010] Step four, integrally cast the lower half part of the cast-in-place beam between the upper sash plate of the starting layer (n layer) and the laminated plate of the starting layer (n layer); first bind the stirrups, then insert the bottom iron steel bar of the beam from one end of the cast-in-place beam, fix and connect the split wall plate and the exposed anchoring member of the upper sash plate, then place the processed stirrups in the corresponding positions according to the design drawings, the stirrups need to be bound and connected with the anchoring bars of the upper sash plate or the split wall plate, then construct the bottom iron steel bar, one end of the bottom iron steel bar is a straight anchor, and the other end of the bottom iron steel bar is a bent anchor, finally cast the lower half part of the cast-in-place beam, and anchor the upper sash plate and the laminated plate together through the cast-in-place beam;

[0011] Step five, the upper cornice plate of the starting layer (n layer) is connected with the partition wall plate of the starting layer (n layer) by dry and wet combination, the reserved grouting pipe part and the horizontal joint part of the partition wall plate are cleaned, the plate joint part where the upper cornice plate intersects with the partition wall plate is sealed by using edge sealing material, after the edge sealing material reaches the strength and is sealed tightly, the grouting machine is used to grout through the grouting pipe, the grouting material is grouted from the horizontal joint, until the vertical joint top between the upper cornice plate and the partition wall plate has grouting material overflow, and finally the grouting pipe is sealed; the dry connection of the partition wall plate and the upper cornice plate is fixed through the adapter;

[0012] Step six, the lower cornice plate of the upper layer (n+1 layer) is installed and the upper half part of the cast-in-place beam is poured; the bottom support system is built on the top of the upper cornice plate of the (n layer), the edge line and the control line of the (n+1 layer) lower cornice plate are released, the lower cornice plate is hoisted and positioned, the exposed anchoring steel bars of the lower cornice plate are fixed with the reserved steel bars of the cast-in-place beam, and then overall cast-in-place operation is carried out;

[0013] Step seven, the installation method of steps one to six is repeated, and the construction is circular until the top layer of the bay window system is installed.

[0014] Preferably, the adapter comprises a mounting bottom plate embedded on the partition wall plate, a connecting plate fixedly installed on the mounting bottom plate, and a connecting bolt fixedly installed on the upper cornice plate, and one end of the connecting plate is fixedly installed on the connecting bolt.

[0015] Preferably, two lower cornice plates are provided, three partition wall plates are provided, and two upper cornice plates are provided; the outer vertical surface of the lower cornice plate is in the shape of a Chinese character "K" as a whole, and the partition wall plate is installed at the shoulder position on both sides of the lower cornice plate.

[0016] Preferably, the bottom support system is a rectangular support frame composed of multiple adjustable support monomers connected by horizontal connecting rods, the adjustable support monomer comprises a fixed support sleeve, an adjusting support rod threadedly connected to the fixed support sleeve, and a mounting seat installed on the fixed support sleeve, and both ends of the horizontal connecting rod are installed on the mounting seat; the relative position of the adjusting support rod on the fixed support sleeve is adjusted to realize adjustable support of the lower cornice plate.

[0017] Preferably, the diagonal bracing system comprises two groups of adjustable support assemblies arranged on both sides of the partition wall plate, the adjustable support assembly comprises two non-parallel adjustable diagonal bracing rods and a support seat hingedly installed at both ends of the adjustable diagonal bracing rod, the support seat is fixedly installed on the superimposed plate or the partition wall plate, and the position and installation angle of the partition wall plate are adjusted by adjusting the length of the adjustable diagonal bracing rod.

[0018] Preferably, the vertical support system comprises a cross-shaped support structure spliced by several steel pipes and a plurality of spaced support legs, the superimposed plate is arranged on one side of the cross-shaped support structure and the support legs, and the overhanging plate is arranged on the other side of the cross-shaped support structure.

[0019] In the present application, the bay window structure is divided into a plurality of overhanging plates, underhanging plates and household wall plates, each plate can be designed according to the size of the building window, and the installation is convenient, and the size and spacing of the window opening are not limited. Even if the double households are adjacent to the building and the super-long bay window can also realize prefabricated connection, and the adaptability is strong. Dry and wet double connection is adopted between the overhanging plate and the household wall plate, the connection is firm and will not produce cracks due to relative displacement. The grouting pipe can realize internal warehouse grouting operation, avoid the disadvantages of traditional grouting construction, and eliminate the risk of plate joint leakage. The bottom support system, the inclined support system and the vertical support system are set to assist the support during construction, which is convenient for precision control of the installation position and angle, and ensures the precision of the installation of each plate. The overhanging plate and the underhanging plate are connected by the cast-in-place beam anchoring connection by layer pouring, and are formed by one-time construction of the main structure, without secondary pouring, and have good integrity and stable connection. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of step one construction of the present application;

[0022] Figure 3 It is a schematic diagram of step two construction of the present application;

[0023] Figure 4 It is a schematic diagram of the household wall plate structure section of the present application;

[0024] Figure 5 It is a schematic diagram of step three construction of the present application;

[0025] Figure 6 It is a schematic diagram of step four construction of the present application;

[0026] Figure 7 It is a schematic diagram of the adapter connection state of the present application;

[0027] Figure 8 It is a schematic diagram of the A-A section of the present application;

[0028] Figure 9 It is a schematic diagram of step six construction of the present application;

[0029] In the diagram: 1. Downward-projecting slab; 2. Partition wall panel; 3. Upward-projecting slab; 4. Connector; 5. Installation gap; 6. Grouting pipe; 7. Bottom support system; 8. Diagonal bracing system; 9. Vertical support system; 10. Cast-in-place beam; 11. Composite slab; 40. Mounting base plate; 41. Connecting plate; 42. Connecting bolt; 70. Horizontal connecting rod; 71. Adjustable support unit; 80. Adjustable diagonal brace; 81. Support base; 90. Grid-shaped support structure; 91. Support leg; 710. Fixed support sleeve; 711. Adjustable support rod; 712. Mounting base. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1 to 9 The diagram illustrates a construction method for a modular prefabricated bay window system. The prefabricated bay window includes a projecting plate 1 positioned below the window opening, multiple partition wall panels 2 mounted on the projecting plate 1, and an upward-projecting plate 3 fixedly mounted on the partition wall panels 2. The upward-projecting plate 1 is located above the window opening and is fixedly connected to the partition wall panels 2 via an adapter 4. In one embodiment, the adapter 4 includes an installation base plate 40 pre-embedded in the partition wall panel 2, a connecting plate 41 fixedly mounted on the installation base plate 40 by welding, and a connecting bolt 42 fixedly mounted on the upward-projecting plate 3. One end of the connecting plate 41 has a slotted hole, and it is fixedly mounted to the connecting bolt 42 using a nut. Specifically, the connecting bolt 42 is an expansion bolt, and the connecting plate 41 is attached to the outer surface of the partition wall panel 2. In this embodiment, there are two cantilevered slabs 1 in each floor, three partition wall panels 2, and two cantilevered slabs 3. The exterior of the cantilevered slab 1 is generally convex in shape. The partition wall panels 2 are installed at the shoulder positions on both sides of the cantilevered slab 1, with the middle partition wall panel 2 being installed on the shoulders of the two cantilevered slabs 1 that are close to each other.

[0032] The installation gaps 5 between the lower cantilever slab 1, the upper cantilever slab 3, and the partition wall panel 2 are sealed by grouting. Specifically, the outside of the connection is sealed with edge sealing material, and grouting is performed from the inside. Two sets of grouting pipes 6 are pre-embedded in the partition wall panel 2. One end of each set of grouting pipes 6 is exposed on the back of the partition wall panel 2, and the other end is exposed on the bottom or top surface of the partition wall panel 2, respectively. Specifically, four grouting pipes are set in each set. The end face of the grouting pipes 6 is flush with the surface of the partition wall panel 2. During non-working hours, rubber plugs are used to seal the ends of the grouting pipes 6. The rubber plugs are removed during the installation of the partition wall panel 2.

[0033] The construction method for a split prefabricated bay window system includes the following steps:

[0034] Step one, install the lower cornice plate 1 of the starting layer (n layer) and pour the cast-in-place beam 10; set up the bottom support system 7 below the installation position of the lower cornice plate 1, release the edge line and control line of the lower cornice plate 1, use hoisting equipment to hoist the lower cornice plate 1 into position and install it on the bottom support system 7, and adjust its position according to the edge line and control line. Bind and fix the exposed anchoring steel bars of the lower cornice plate 1 with the reserved steel bars of the cast-in-place beam 10, and then conduct overall cast-in-place operation on this part.

[0035] The bottom support system 7 is a rectangular support frame composed of multiple adjustable support units 71 connected by multiple horizontal connecting rods 70. The adjustable support unit 71 includes a fixed support sleeve 710, an adjusting support rod 711 connected to the fixed support sleeve 710 by screwing, and a mounting seat 712 mounted on the fixed support sleeve 710. The two ends of the horizontal connecting rod 70 are mounted on the mounting seat 712. During construction, a rectangular support frame of different lengths and widths is built according to the size of the lower cornice plate 1, which can be adjusted according to the actual construction site and has strong adaptability. The relative position of the adjusting support rod 711 on the fixed support sleeve 710 is adjusted to achieve adjustable support of the lower cornice plate 1. Specifically, a screwing part is provided on the adjusting support rod 711 to rotate and adjust the adjusting support rod 711. In one preferred embodiment, a movable pad is installed on the top of the adjusting support rod 711. When the lower cornice plate 1 is placed on the adjustable support unit 71, rotating the adjusting support rod 711 avoids damaging the lower cornice plate 1 through the pad.

[0036] Step two, install the individual house wall plate 2 of the starting layer (n layer) and seal and grout the bottom of the individual house wall plate 2. Release the edge line and control line of the individual house wall plate 2, use hoisting equipment to hoist the individual house wall plate 2 into position, and adjust and fix the position of the individual house wall plate 2 through the inclined support system 8. Clean the reserved grouting pipe 6 part and the horizontal joint part of the individual house wall plate 2, use edge sealing material to seal the joints on both sides of the intersection of the individual house wall plate 2, after the edge sealing material reaches the strength and is sealed tightly, use a grouting machine to grout through the grouting pipe 6, the grouting material starts from the horizontal joint and continues until the top of the vertical joint between the lower cornice plate 1 and the individual house wall plate 2 has grouting material overflowing, the grouting is completed, and finally the grouting pipe 6 is sealed with a rubber plug. Specifically, the grouting pipe 6 is a PVC pipe or a metal corrugated pipe. After the grouting material solidifies, clean and level.

[0037] The inclined bracing system 8 comprises two groups of adjustable support assemblies arranged on the left and right sides of the partition wall panel 2, and the adjustable support assembly comprises two non-parallel adjustable inclined bracing rods 80 and support seats 81 hingedly arranged at the two ends of the adjustable inclined bracing rod 80, and the support seat 81 is fixedly arranged on the laminated slab 11 or the partition wall panel 2 through fasteners. The partition wall panel 2 is connected with the laminated slab 11 through the adjustable support assembly, and the length of the adjustable inclined bracing rod 80 is adjusted to adjust the position and installation angle of the partition wall panel 2. Specifically, the adjustable inclined bracing rod 80 is composed of two round pipes connected through threads.

[0038] Step three, install the overhanging plate 3 of the starting layer (n layer), and install the laminated slab 11 of the starting layer (n layer). First, build the vertical support system 9, release the elevation control line, depth control line and lateral control line for installing the overhanging plate 3, and hoist the overhanging plate 3 and the laminated slab 11 to the vertical support system 9 for adjustment and installation. Specifically, the elevation control line is a 1000mm line released on the surrounding wall, which controls the up-down distance of the overhanging plate 3, and the distance meets the up-down size of the window opening. The depth control line is a 300mm line from the boundary beam, which is used to control the distance in the depth direction of the overhanging plate 3. The lateral control line is the center line of the symmetric center of the window opening, which is used to control the distance of the overhanging plate 3 in the left-right direction of the window opening.

[0039] The vertical support system 9 comprises a cross-shaped support structure 90 composed of several steel pipes and a plurality of support legs 91 arranged at intervals, and the laminated slab 11 is arranged on one side of the cross-shaped support structure 90 and the support leg 91, and the overhanging plate 3 is arranged on the other side of the cross-shaped support structure 90. The top of the cross-shaped support structure 90 is in a stepped shape, and the elevations of the stepped parts are matched with the installation heights of the laminated slab 11 and the overhanging plate 3 respectively. The support leg 91 comprises a top support rod and a plurality of inclined support legs fixedly arranged on the lower side of the top support rod. The arrangement of the inclined support legs increases the stability of the support leg itself and ensures the safety of the operation. Specifically, the cross-shaped support structure 90 is a frame structure composed of vertical rods and horizontal rods connected by steel pipe fasteners, and the vertical rods are arranged at a longitudinal and transverse interval of 900mm, and the horizontal rods are arranged at a step interval of 900mm. The vertical rods and horizontal rods of the overhanging plate 3 and the eaves plate 1 of the same layer are arranged at a longitudinal and transverse interval of 300mm and a horizontal rod step interval of 900mm. The net height of the overhanging plate 3 and the eaves plate 1 across the layers is 580mm, and the keel adopts a 40*80 wooden square.

[0040] Step four, the cast-in-place beam lower half of the whole pouring between the upper plate 3 of the starting layer (n layer) and the superimposed plate 11 of the starting layer (n layer) is poured; first, the stirrup is bound, then the bottom iron of the beam is inserted from one end of the cast-in-place beam 10, the exposed anchor of the superimposed plate 11 and the upper plate 3 are fixedly connected, then the processed stirrup is placed in the corresponding position according to the design drawing, the stirrup needs to be bound with the anchor of the upper plate 3 or the mustache wire of the superimposed plate 11, then the bottom iron of the beam is constructed, one end of the bottom iron is a straight anchor, the other end of the bottom iron is a bent anchor, and finally the lower half of the cast-in-place beam 10 is poured with concrete, and the upper plate 3 and the superimposed plate 11 are anchored together through the cast-in-place beam 10. In another embodiment, both ends of the bottom iron are in the form of a bent anchor, which is fixedly connected by reverse thread straight thread connection.

[0041] Step five, the upper plate 3 of the starting layer (n layer) and the household wall plate 2 of the starting layer (n layer) are connected in dry-wet combination. The reserved grouting pipe 6 part and the horizontal joint part of the household wall plate 2 are cleaned, the plate joint between the upper plate 3 and the household wall plate 2 is sealed with edge sealing material, after the edge sealing material reaches the strength and is sealed tightly, the grouting machine is used to grout through the grouting pipe 6, the grouting material is grouted from the horizontal joint, until the top of the vertical joint between the upper plate 3 and the household wall plate 2 has grouting overflow, finally the rubber plug is used to seal the grouting pipe 6, realizing the wet connection of the two, after the grouting material is solidified, it is cleaned and leveled. The dry connection of the household wall plate 2 and the upper plate 3 is fixed by the adapter 4, specifically, the connecting bolt 42 is selected as M20 bolt, one end of the connecting plate 41 is fixedly installed on the installation bottom plate 40 by welding, so that a stable force transmission system is formed between the two, avoiding the problem that the grouting sealing connection is damaged due to stress and affects the sealing effect, improving the stability of the assembled connection.

[0042] Step six, install the lower cantilevered plate 1 of the upper layer (n+1 layer) and cast the upper half of the cast-in-place beam 10. Build the bottom support system 7 on the top of the cantilevered plate 3 of the (n layer) according to the relevant steps in step one, release the edge line and control line of the lower cantilevered plate 1 of the (n+1 layer), hoist the lower cantilevered plate 1 into position, bind and fix the exposed anchoring steel bars of the lower cantilevered plate 1 with the reserved steel bars of the cast-in-place beam 10, and then perform the overall cast-in-place operation. Specifically, before installing the lower cantilevered plate 1 of the upper layer (n+1 layer), the placed stirrups should be adjusted to ensure that the upper iron steel bars of the cast-in-place beam 10 can be smoothly inserted, and the lower cantilevered plate 1 of the upper layer (n+1 layer) has no fixed pulling measures during the insertion of the upper iron, the bottom support system 7 is only used as a support for the up-down displacement control, and the bay window plate has no effective fixation in the depth direction and left-right direction. At this time, the binding of the exposed anchoring steel bars and the stirrups of the lower cantilevered plate 1 should be very firm and cannot have any amount of shaking. After the insertion of the beam upper iron steel bars is completed, the positioning of the lower cantilevered plate 1 is rechecked again, and if there is any deviation, it needs to be adjusted in time. After the insertion of the upper iron steel bars is completed and the lower cantilevered plate 1 of the upper layer (n+1 layer) is fixed firmly, the remaining part of the cast-in-place beam 10 can be cast with concrete.

[0043] Step seven, repeat the installation method of steps one to six, and cycle the construction until the top bay window system is installed, all support systems are removed, and the installation of the prefabricated bay window system is completed.

[0044] The above examples are only a number of descriptions of the concept and implementation of the present application, and do not limit it. Under the concept of the present application, technical solutions without substantial changes are still within the protection scope.

Claims

1. A construction method for a split-type prefabricated bay window system, characterized in that: The prefabricated bay window includes a cantilevered plate below the window opening, multiple partition wall panels installed on the cantilevered plate, and an upper cantilevered plate fixedly installed on the partition wall panels. The upper cantilevered plate is located above the window opening and is fixedly connected to the partition wall panels via adapters. The installation gaps between the cantilevered plate, the upper cantilevered plate, and the partition wall panels are sealed by grouting. Two sets of grouting pipes are pre-embedded in the partition wall panels, with one end of each set of grouting pipes exposed on the back of the partition wall panel, and the other ends of the two sets of grouting pipes exposed on the bottom or top surface of the partition wall panel, respectively. The construction method includes the following steps: Step 1: Install the cantilever slab of the starting layer (nth layer) and pour the cast-in-place beam; set up a bottom support system below the installation position of the cantilever slab, mark the edge line and control line of the cantilever slab, hoist the cantilever slab into place, fix the exposed anchoring steel bars of the cantilever slab to the reserved steel bars of the cast-in-place beam, and then carry out the overall cast-in-place operation. Step 2: Install the partition wall panels of the starting layer (n layers), and seal and grout the bottom of the partition wall panels; mark the edge lines and control lines of the partition wall panels, hoist the partition wall panels into place, and adjust and fix the position of the partition wall panels through the diagonal bracing system; clean the reserved grouting pipe area and the horizontal joint area of ​​the partition wall panels, and seal the joints on both sides of the junction of the partition wall panels with edge sealing material. After the edge sealing material reaches the strength and seals tightly, use a grouting machine to inject grout through the grouting pipe. The grouting material is injected from the horizontal joint until grout overflows from the top of the vertical joint between the cantilevered plate and the partition wall panel. Finally, seal the grouting pipe. Step 3: Install the cantilever slab of the starting layer (n layers) and the composite slab of the starting layer (n layers); build a vertical support system, and mark the elevation control line, depth control line and lateral control line for the installation of the cantilever slab. Hoist the cantilever slab and the composite slab onto the vertical support system. Step 4: Cast the lower half of the cast-in-place beam between the cantilever slab of the starting layer (n layers) and the composite slab of the starting layer (n layers). First, tie the stirrups, then insert the bottom steel reinforcement of the beam from one end of the cast-in-place beam, and fix the reinforcing bars of the composite slab and the exposed anchors of the cantilever slab. Next, place the processed stirrups in the corresponding positions according to the design drawings. The stirrups need to be tied to the anchor bars of the cantilever slab or the reinforcing bars of the composite slab. Then, construct the bottom steel reinforcement of the beam. One end of the bottom steel reinforcement is a straight anchor, and the other end of the bottom steel reinforcement is a bent anchor. Finally, pour the concrete for the lower half of the cast-in-place beam, and anchor the cantilever slab and the composite slab together through the cast-in-place beam. Step 5: Connect the cantilever slab of the starting layer (layer n) to the partition wall panel of the starting layer (layer n) using a dry and wet combination; clean the reserved grouting pipe area and the horizontal joint of the partition wall panel; seal the joint where the cantilever slab and the partition wall panel intersect with edge sealing material; after the edge sealing material reaches the required strength and seals tightly, use a grouting machine to inject grout through the grouting pipe, starting from the horizontal joint until grout overflows from the top of the vertical joint between the cantilever slab and the partition wall panel; finally, seal the grouting pipe; use the adapter to fix the partition wall panel and the cantilever slab with a dry connection; Step 6: Install the cantilever slab of the next (n+1)th floor and pour the upper half of the cast-in-place beam; build a bottom support system on the top of the cantilever slab of the (n)th floor, mark the edge line and control line of the cantilever slab of the (n+1)th floor, hoist the cantilever slab into place, fix the exposed anchoring steel bars of the cantilever slab to the reserved steel bars of the cast-in-place beam, and then carry out the overall cast-in-place operation; Step 7: Repeat the installation methods from Step 1 to Step 6, and continue the construction cycle until the top-floor bay window system is installed.

2. The construction method of the split prefabricated bay window system according to claim 1, characterized in that: The adapter includes an installation base plate pre-embedded in the partition wall panel, a connecting plate fixedly installed on the installation base plate, and a connecting bolt fixedly installed on the upper plate, with one end of the connecting plate fixedly installed on the connecting bolt.

3. The construction method of the split prefabricated bay window system according to claim 1 or 2, characterized in that: Two cantilevered slabs are provided, three partition wall panels are provided, and two cantilevered slabs are provided; the exterior facade of the cantilevered slab is generally convex in shape, and the partition wall panels are installed at the shoulder positions on both sides of the cantilevered slab.

4. The construction method of the split prefabricated bay window system according to claim 1, characterized in that: The bottom support system is a rectangular support frame composed of multiple adjustable support units connected horizontally and vertically by multiple horizontal connecting rods. Each adjustable support unit includes a fixed support sleeve, an adjusting rod connected to the fixed support sleeve by threads, and a mounting seat installed on the fixed support sleeve. Both ends of the horizontal connecting rod are installed on the mounting seat. Adjusting the relative position of the adjusting rod on the fixed support sleeve achieves adjustable support for the cantilever plate.

5. The construction method of the split prefabricated bay window system according to claim 1 or 4, characterized in that: The diagonal bracing system includes two sets of adjustable support components disposed on both sides of the partition wall panel. Each adjustable support component includes two non-parallel adjustable diagonal bracing rods and support seats hinged to both ends of the adjustable diagonal bracing rods. The support seats are fixedly installed on the composite slab or partition wall panel. The position and installation angle of the partition wall panel can be adjusted by adjusting the length of the adjustable diagonal bracing rods.

6. The construction method of the split prefabricated bay window system according to claim 5, characterized in that: The vertical support system includes a grid-shaped support structure spliced ​​from several steel pipes and multiple spaced support legs. The composite plate is disposed on one side of the grid-shaped support structure and on the support legs, and the cantilever plate is disposed on the other side of the grid-shaped support structure.

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