Construction method for rebuilding old residence and supplementing floor slabs

Abstract

The invention belongs to the technical field of building transformation, and discloses a construction method for adding floor slabs for old house transformation, which comprises the following steps: mounting a support rod piece on a starting floor; the prefabricated floor slab assembly is hoisted to the next floor of the starting floor; one end of the prefabricated floor slab assembly is erected on the original concrete structure of the current floor, and the other end of the prefabricated floor slab assembly is erected on the top of the supporting rod piece of the previous floor; a prefabricated floor slab body of the prefabricated floor slab assembly is fixedly connected to an original concrete structure of the current floor; the supporting rod piece at the previous floor is dismantled, and reinforced concrete construction is conducted on the prefabricated floor slab body of the current floor; and the other supporting rod piece is installed on the top of the prefabricated floor slab assembly of the current floor, the other prefabricated floor slab assembly is hoisted to the next floor of the current floor, and the installation steps are repeated till all the floors are supplemented with the prefabricated floor slab assemblies in a one-to-one correspondence mode. By means of the method, floor slab supplement construction of the old residence can be achieved under the condition that large-scale disassembly and large-scale building are avoided, and the construction efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building renovation, and particularly to a construction method for supplementing floor slabs in the renovation of old residential buildings. Background Art

[0002] At present, most old high-rise residential buildings were constructed in the 1970s to 1990s of the last century, with a long service life, resulting in aging defects such as falling blocks on the outer walls, water leakage, and aging of supporting facilities in these old residential buildings. In order to continue to be inhabited or meet new functional requirements, it is necessary to reconstruct the original residential structure, such as adding public elevators, expanding the outer balcony floor slabs, or adding a curtain wall system to the outer facade. When reconstructing, it involves supplementing the floor slab structure at the edge of the building structure.

[0003] If according to the traditional renovation plan, it is necessary to carry out large-scale demolition and renovation on the outer edge structure of the building. The construction scale and difficulty are close to those of residential building reconstruction. At the same time, due to the generally complex on-site construction environment, it is necessary to layer by layer erect and dismantle operation scaffolds for supplementing the floor slabs on the outer side of the residential building, which is extremely inconvenient for construction and will consume a large amount of manpower and material resources. In addition, since the supplementary floor slab on the outer edge of the building belongs to a cantilever structure, in order to ensure structural safety, it is often necessary to additionally increase columns to meet the increased bearing capacity of the supplementary floor slab. However, in the context of the current stock era, such a large-scale demolition and construction residential development model has gradually lost its competitive advantage.

[0004] Therefore, there is an urgent need to propose a construction method for supplementing floor slabs in the renovation of old residential buildings to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a construction method for supplementing floor slabs in the renovation of old residential buildings, which can realize the construction of supplementing floor slabs in old residential buildings without large-scale demolition and construction, and is beneficial to improving the construction efficiency.

[0006] As conceived above, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a construction method for supplementing floor slabs in the renovation of old residential buildings. The construction device for supplementing floor slabs includes a plurality of precast floor slab components and a plurality of support rods, and the support rods are configured to be supported and connected between two adjacent precast floor slab components; the construction method for supplementing floor slabs in the renovation of old residential buildings includes:

[0008] S1. Install the support rods on the starting floor;

[0009] S2. Hoist the precast floor slab components to the lower floor of the starting floor;

[0010] S3. Place one end of the precast floor slab component on the original concrete structure of the current floor, and the other end on the top of the support rods at the previous floor;

[0011] S4. Fix the precast floor slab body of the precast floor slab assembly to the original concrete structure of the current floor;

[0012] S5. Demolish the support members at the previous floor, and perform reinforced concrete construction on the precast floor slab body of the current floor;

[0013] S6. Install another support member on the top of the precast floor slab assembly of the current floor, hoist another precast floor slab assembly to the next floor below the current floor, and repeat steps S3 to S5 until each floor is supplemented with the precast floor slab assembly one by one.

[0014] In some embodiments, the precast floor slab assembly further includes a backing plate member and a support connecting member. The backing plate member and the support connecting member are respectively detachably connected to opposite ends of the precast floor slab body; the support connecting member includes a connecting member body and a clamping groove member. The connecting member body is disposed on the top of the precast floor slab body, and the clamping groove member is disposed on the bottom of the precast floor slab body. The support member can be supported and connected between the connecting member body of the current floor and the clamping groove member of the next floor below;

[0015] Step S3 specifically is: lap the backing plate member on the original concrete structure of the current floor, and sleeved the clamping groove member at the bottom of the support connecting member on the top of the support member at the previous floor.

[0016] In some embodiments, after step S6, it further includes:

[0017] Demolish the backing plate member and the support connecting member at all floors.

[0018] In some embodiments, the precast floor slab body includes a steel structure side beam and a floor slab structure. The steel structure side beam is connected to the bottom of the floor slab structure; step S4 includes:

[0019] S41. Fix the steel structure side beam to the original beam structure of the current floor;

[0020] S42. Fix the floor slab structure to the original concrete floor slab of the current floor.

[0021] In some embodiments, the original beam structure is a steel structure beam; step S41 specifically includes:

[0022] Fix a connecting steel plate in the installation area of the original beam structure, and weld the steel structure side beam to the connecting steel plate.

[0023] In some embodiments, the original beam structure is a concrete beam; step S41 specifically includes:

[0024] Set post - embedded parts in the installation area of the original beam structure, and make part of the post - embedded parts extend out of the original beam structure, and weld the steel - structure side beam to the extended part of the post - embedded parts relative to the original beam structure.

[0025] In some embodiments, the steel - structure side beam is set as two I - beam side beams, and the two I - beam side beams are arranged at intervals along the first direction on both sides of the bottom of the floor slab structure, and the retaining plate parts and the support connecting parts are respectively detachably connected to the opposite ends of the I - beam side beams along their own lengths.

[0026] In some embodiments, the floor slab structure includes a cast - in - place composite floor slab area and a precast PC floor slab area. The cast - in - place composite floor slab area is set as a steel - bar truss formwork, and the cast - in - place composite floor slab area is closer to the original concrete floor slab relative to the precast PC floor slab area.

[0027] In some embodiments, the precast PC floor slab area has internal steel bars and the internal steel bars extend to the cast - in - place composite floor slab area; step S42 specifically includes:

[0028] Set post - installed reinforcing bars in the installation area of the original concrete floor slab, and make part of the post - installed reinforcing bars extend out of the original concrete floor slab, and weld - connect the internal steel bars at the cast - in - place composite floor slab area to the extended part of the post - installed reinforcing bars relative to the original concrete floor slab.

[0029] In some embodiments, before step S1, it further includes:

[0030] Perform pre - treatment on the installation area of each floor.

[0031] Advantages of the present invention:

[0032] The construction method for adding a floor slab to an old residential building provided by the present invention uses support members to temporarily support precast floor slab components to achieve the layer - by - layer installation of precast floor slab components, so that a large amount of external scaffolding does not need to be erected and dismantled during the construction process, and no additional columns need to be set up, reducing the safety risk of high - altitude operations, while reducing construction time and labor input. In addition, the precast floor slab components and the support members can be pre - fabricated and processed in batches in the factory in advance. During the on - site construction of adding a floor slab, only layer - by - layer hoisting and installation are required, greatly improving the construction efficiency. That is, by adopting the combination form of precast floor slab components and support members, the construction of adding a floor slab to an old residential building can be realized without large - scale demolition and construction, and it is beneficial to improve the construction efficiency. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on the content of the embodiments of the present invention and these accompanying drawings.

[0034] Figure 1 It is a construction schematic diagram of the supplementary floor slab provided by the embodiment of the present invention;

[0035] Figure 2 It is an assembly schematic diagram of the precast floor slab component and the original concrete structure provided by the embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the precast floor slab component provided by the embodiment of the present invention;

[0037] Figure 4 It is Figure 3 The sectional view structure at A-A in

[0038] Figure 5 It is Figure 3 The sectional view structure at B-B in

[0039] Figure 6 It is Figure 3 The sectional view structure at C-C in

[0040] Figure 7 It is Figure 3 The sectional view structure at D-D in

[0041] Figure 8 It is a connection schematic diagram of the steel structure side beam and the original beam structure in one case provided by the embodiment of the present invention;

[0042] Figure 9 It is a connection schematic diagram of the steel structure side beam and the original beam structure in another case provided by the embodiment of the present invention;

[0043] Figure 10 It is a connection schematic diagram of the floor slab structure and the original concrete floor slab provided by the embodiment of the present invention;

[0044] Figure 11 It is a structural schematic diagram of the floor slab steel bars provided by the embodiment of the present invention.

[0045] In the figure:

[0046] 1. Prefabricated floor slab assembly; 11. Prefabricated floor slab body; 111. Steel structure side beam; 112. Floor slab structure; 1121. Cast-in-place composite floor slab area; 1122. Prefabricated PC floor slab area; 12. Leaning code plate member; 13. Support connecting member; 131. Connecting member body; 132. Card slot member;

[0047] 2. Support rod member;

[0048] 100. Original concrete structure;

[0049] 10. Original beam structure; 20. Original concrete floor slab; 30. Connecting steel plate; 40. Post-embedded part; 50. Internal steel bar; 60. Post-implanted steel bar; 70. Side formwork; 80. Floor slab steel bar. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0052] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0054] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0056] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0057] As Figures 1 to 11 shown, the construction device for adding a supplementary floor slab in the renovation of old residential buildings provided in this embodiment includes a plurality of precast floor slab components 1 and a plurality of support members 2, and the support members 2 are configured to be supported and connected between two adjacent precast floor slab components 1.

[0058] Correspondingly, the construction method for adding a supplementary floor slab in the renovation of old residential buildings includes:

[0059] S1. Install the support members 2 on the starting floor;

[0060] S2. Hoist the precast floor slab component 1 to the lower floor of the starting floor;

[0061] S3. Place one end of the precast floor slab component 1 on the original concrete structure 100 of the current floor, and the other end on the top of the support member 2 at the previous floor; that is: after the precast floor slab component 1 is hoisted in place, it can be temporarily positioned by the support of the support member 2;

[0062] S4. Fix and connect the precast floor slab body 11 of the precast floor slab component 1 to the original concrete structure 100 of the current floor;

[0063] S5. Demolish the support member 2 at the previous floor before demolition, and perform reinforced concrete construction on the precast floor slab body 11 of the current floor.

[0064] S6. Install another support member 2 on the top of the precast floor slab assembly 1 of the current floor, hoist another precast floor slab assembly 1 to the next lower floor of the current floor, and repeat steps S3 to S5 until each floor is supplemented with a precast floor slab assembly 1 in one-to-one correspondence.

[0065] Wherein, the next lower floor of a certain floor refers to the higher floor adjacent to it. For example, if the starting floor is the first floor, the next lower floor of the starting floor is the second floor; if the current floor is the second floor, the next lower floor of the current floor is the third floor.

[0066] It should be noted that when performing step S1, when the starting floor is the first floor, the bottom of the support member 2 can be directly installed on the ground, and there is no need to install the precast floor slab assembly 1 on the ground in advance.

[0067] Taking the first floor as the starting floor for illustration, in specific implementation, first install the support member 2 on the ground of the first floor, so that the bottom of the support member 2 is installed on the ground and extends vertically by itself. Then hoist the precast floor slab assembly 1 to the second floor, and make one end of the precast floor slab assembly 1 rest on the original concrete structure 100 on the second floor, and the other end rest on the top of the support member 2 on the first floor. After the precast floor slab assembly 1 is temporarily positioned, the previous hoisting equipment can release the hook. Then fixedly connect the precast floor slab body 11 of the precast floor slab assembly 1 to the original concrete structure 100 on the second floor. After the fixed connection is completed, the force on the support member 2 on the first floor is transferred to the precast floor slab body 11. At this time, the support member 2 on the first floor can be demolished, and at the same time, reinforced concrete construction can be carried out on the top surface of the precast floor slab body 11 on the second floor. Then, install the next support member 2 on the top of the precast floor slab assembly 1 on the second floor, hoist another precast floor slab assembly 1 to the third floor, and repeat the temporary positioning, fixed connection operation and reinforced concrete construction during the construction on the second floor before. After the floor slab on the third floor is supplemented, the supplementation construction on the fourth floor is carried out, and so on layer by layer until the supplementation of floor slabs for all floors of the original building is completed.

[0068] The construction method for supplementing the floor slab of an old residential building provided in this embodiment temporarily supports the precast floor slab assembly 1 through the support member 2 to achieve the layer-by-layer installation of the precast floor slab assembly 1, so that a large number of external scaffolding do not need to be erected and demolished during the construction process, and no additional columns need to be erected, reducing the safety risks of high-altitude operations, and at the same time reducing the construction time and labor input. In addition, the precast floor slab assembly 1 and the support member 2 can be prefabricated and processed in batches in the factory in advance. During the on-site construction of supplementing the floor slab, only layer-by-layer hoisting and installation are required, greatly improving the construction efficiency. That is, by adopting the combined form of the precast floor slab assembly 1 and the support member 2, the construction of supplementing the floor slab of an old residential building can be realized without large-scale demolition and construction, and it is beneficial to improve the construction efficiency.

[0069] Optionally, as Figure 11 shown, in step S5, when performing reinforced concrete construction on the precast floor slab body 11 of the current floor, the floor slab reinforcement 80 can be arranged in a double-layer and two-way manner. Exemplarily, the floor slab reinforcement 80 adopts HRB400 steel bars with a diameter of 12 mm, and the spacing of the floor slab reinforcement 80 in the double-layer and two-way arrangement is 200 mm.

[0070] As Figure 1 、 Figure 3 、 Figure 4 and Figure 6 shown, in some embodiments, the precast floor slab assembly 1 further includes a backing plate member 12 and a support connecting member 13. The backing plate member 12 and the support connecting member 13 are respectively detachably connected to opposite ends of the precast floor slab body 11. The support connecting member 13 includes a connecting member body 131 and a clamping groove member 132. The connecting member body 131 is arranged on the top of the precast floor slab body 11, and the clamping groove member 132 is arranged on the bottom of the precast floor slab body 11. The support member 2 can be supported and connected between the connecting member body 131 of the current floor and the clamping groove member 132 of the next floor. As mentioned above, the backing plate member 12 and the support connecting member 13 can be pre-assembled to the precast floor slab body 11 in the factory.

[0071] Step S3 is specifically: lap the backing plate member 12 on the original concrete structure 100 of the current floor, and sleeved the clamping groove member 132 at the bottom of the support connecting member 13 on the top of the support member 2 at the previous floor.

[0072] By setting the special backing plate member 12 and the support connecting member 13, the backing plate member 12 can be closely attached and lapped on the original concrete structure 100 of the current floor, enabling the precast floor slab assembly 1 to be quickly in place during installation; the design of the support connecting member 13 is beneficial to realizing the stable connection and rapid assembly between adjacent precast floor slab assemblies 1.

[0073] Optionally, the connecting member body 131 in the supporting connecting member 13 is provided with a height adjusting device. In this way, when the supporting rod member 2 is supported between the connecting member body 131 on the current floor and the clamping groove member 132 on the next lower floor, the height adjusting device of the connecting member body 131 can be adjusted to adjust the height of the supporting rod member 2 until the top of the supporting rod member 2 is stably supported inside the clamping groove member 132.

[0074] Further, after step S6, it further includes:

[0075] Remove the backing plate members 12 and the supporting connecting members 13 at all floors. That is, remove the components used for temporary positioning during the construction process, avoiding the influence of additional components on the long-term structural stability. At the same time, the removed backing plate members 12 and the supporting connecting members 13 can be reused in subsequent construction, further reducing the construction cost.

[0076] As Figures 3 to 10 shown, in some embodiments, the precast floor slab body 11 includes a steel structure side beam 111 and a floor slab structure 112, and the steel structure side beam 111 is connected to the bottom of the floor slab structure 112. Step S4 includes:

[0077] S41. Fix the steel structure side beam 111 to the original beam structure 10 on the current floor;

[0078] S42. Fix the floor slab structure 112 to the original concrete floor slab 20 on the current floor.

[0079] That is, when performing the fixing construction of the precast floor slab body 11 in step S4, first fix the steel structure side beam 111, and then fix the floor slab structure 112.

[0080] Specifically, fixing the steel structure side beam 111 to the original beam structure first can preferentially form a stable load-bearing skeleton, making the subsequent fixing of the floor slab structure 112 more stable. In addition, the steel structure side beam 11 bears the main boundary force of the precast floor slab body 11, ensuring that the load of the newly added floor slab can be effectively transmitted to the original beam structure 10, which is beneficial to improving the overall structural strength and stability.

[0081] Optionally, after step S41, that is, after the steel structure side beam 111 is fixed, the force of the precast floor slab assembly 1 has been transferred from the supporting rod member 2 to the steel structure side beam 111. At this time, the supporting rod member 2 on the previous floor can be removed.

[0082] As Figures 4 to 6 shown, in some embodiments, the steel structure side beam 111 is provided as two I-beam side beams, and the two I-beam side beams are arranged along the first direction ( Figure 3are arranged at both sides of the bottom of the floor structure 112 at intervals in the X direction (in the figure), and the spacer plates 12 and the support connectors 13 are respectively detachably connected to the opposite ends of the I-beam side beam along its length direction.

[0083] The I-beam side beam has high stiffness and strong load-bearing capacity, can effectively share the load of the floor structure 112, reduce deformation, and the I-beam side beam is convenient for standardized processing and installation. At the same time, the two I-beam side beams are respectively arranged at the two side edges of the floor structure 112, which is beneficial to balance the force and enhance the overall stability.

[0084] Such as Figure 8 shown, in some embodiments, the original beam structure 10 is a steel structure beam. At this time, step S41 specifically includes:

[0085] Fix the connecting steel plate 30 in the installation area of the original beam structure 10, and weld the steel structure side beam 111 to the connecting steel plate 30.

[0086] By fixing the connecting steel plate 30 on the original steel structure beam and then welding the steel structure side beam 111, the connection strength and stability can be improved, the damage to the original beam structure 10 caused by direct welding can be avoided, and at the same time, the force is ensured to be uniform, and the overall load-bearing capacity of the supplementary floor is enhanced.

[0087] Among them, the connecting steel plate 30 can also be fixed to the original beam structure 10 by welding.

[0088] Such as Figure 9 shown, in some embodiments, the original beam structure 10 is a concrete beam. At this time, step S41 specifically includes:

[0089] Set the post-embedded parts 40 in the installation area of the original beam structure 10, and make the post-embedded parts 40 partially protrude from the original beam structure 10, and weld the steel structure side beam 111 to the protruding part of the post-embedded parts 40 relative to the original beam structure 10.

[0090] Connecting the steel structure side beam 111 to the original concrete beam through the post-embedded parts 40 can ensure firm anchoring, improve the connection strength, and avoid directly damaging the original concrete structure.

[0091] Such as Figure 3 and Figure 7 shown, in some embodiments, the floor structure 112 includes a cast-in-place composite floor area 1121 and a precast PC floor area 1122. The cast-in-place composite floor area 1121 is set as a steel bar truss formwork, and the cast-in-place composite floor area 1121 is closer to the original concrete floor 20 than the precast PC floor area 1122.

[0092] The cast-in-place composite floor area 1121 adopts the form of a steel bar truss template, which can be used as the bottom formwork of the floor in the connection area. It can adjust and reserve the welding space for the steel structure side beam 111 in the early stage of construction, that is: it can be used as an operating platform for construction workers to stand on and carry out the welding operation of the steel structure side beam 111 and the original beam structure 10. In the later stage of construction, the steel bar truss template serves as the supplementary bottom formwork of the cast-in-place floor.

[0093] As Figure 5 and Figure 7 shown, in some embodiments, side formwork 70 is further provided on the remaining circumferential sides of the floor structure 112 except for the installation side. Specifically, the side formwork 70 is an L-shaped galvanized steel side formwork. The side formwork 70 forms a retaining wall, which can limit the concrete pouring range and ensure the forming quality of the supplementary floor edge.

[0094] As Figure 10 shown, in some embodiments, the precast PC floor area 1122 has internal steel bars 50 and the internal steel bars 50 extend to the cast-in-place composite floor area 1121. Step S42 specifically includes:

[0095] Post-embedded steel bars 60 are set in the installation area of the original concrete floor 20, and part of the post-embedded steel bars 60 extends out of the original concrete floor 20. The internal steel bars 50 at the cast-in-place composite floor area 1121 are welded to the extended part of the post-embedded steel bars 60 relative to the original concrete floor 20.

[0096] Connecting the floor structure 112 to the original concrete floor 20 through the post-embedded steel bars 60 is beneficial to improving the interface bonding strength, enhancing the bending resistance of the floor structure 112, and ensuring long-term stability.

[0097] Optionally, the welding connection method between the internal steel bars 50 and the post-embedded steel bars 60 is lap double-sided welding.

[0098] In some embodiments, before step S1, it further includes:

[0099] Performing pre-treatment on the installation area of each floor. The pre-treatment includes but is not limited to work such as roughening the concrete surface, surface inspection, construction of post-embedded parts 40 and post-embedded steel bars 60, etc.

[0100] By performing pre-treatment on the installation area before the formal start of the supplementary floor construction, potential defects of the original concrete structure 100 can be effectively detected, which is beneficial to improving the construction quality of the supplementary floor. Moreover, performing the construction of post-embedded parts 40 and post-embedded steel bars 60 in advance during the pre-treatment link is beneficial to improving the construction efficiency of the supplementary floor construction.

[0101] In some embodiments, other functional connectors may be provided within the precast PC floor slab area 1122, such as curtain walls or decorations, etc. After completing step S6, that is, after each floor is supplemented with a precast floor slab component 1 one by one, the installation process of other functional connectors can be carried out.

[0102] Note that the above are only the preferred embodiments of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The construction method for adding floor slabs to old residential buildings is characterized by: The construction device for adding a floor slab comprises a plurality of prefabricated floor slab components (1) and a plurality of supporting rods (2), wherein the supporting rods (2) are configured to support and connect between two adjacent prefabricated floor slab components (1); the construction method for adding a floor slab in the renovation of an old residential building comprises: S1, installing the support rod (2) on the starting floor; S2, hoisting the prefabricated floor slab assembly (1) to the next floor of the starting floor; S3, placing one end of the prefabricated floor slab assembly (1) on the original concrete structure (100) of the current floor, and placing the other end on the top of the support rod (2) at the previous floor; S4, fixedly connecting the prefabricated floor slab body (11) of the prefabricated floor slab assembly (1) to the original concrete structure (100) of the current floor; S5, removing the support rods (2) at the previous floor, and performing reinforced concrete construction on the prefabricated floor slab body (11) at the current floor; S6. Install another supporting rod (2) on the top of the prefabricated floor slab assembly (1) on the current floor, hoist another prefabricated floor slab assembly (1) to the next floor of the current floor, and repeat steps S3 to S5 until all floors are supplemented with prefabricated floor slab assemblies (1) one by one.

2. The construction method for adding floor slabs to old residential buildings according to claim 1 is characterized in that: The prefabricated floor slab assembly (1) further comprises a support plate (12) and a support connector (13), wherein the support plate (12) and the support connector (13) are respectively detachably connected to opposite ends of the prefabricated floor slab body (11); the support connector (13) comprises a connector body (131) and a slot member (132), wherein the connector body (131) is arranged at the top of the prefabricated floor slab body (11), and the slot member (132) is arranged at the bottom of the prefabricated floor slab body (11), and the support rod (2) can be supported and connected between the connector body (131) of the current floor and the slot member (132) of the next floor; The step S3 specifically comprises: overlapping the code plate (12) with the original concrete structure (100) of the current floor, and sleeve-mounting the slot member (132) at the bottom of the support connector (13) on the top of the support rod member (2) at the previous floor.

3. The construction method for adding floor slabs to old residential buildings according to claim 2 is characterized in that: After step S6, the method further includes: The support plates (12) and the support connectors (13) at all floors are removed.

4. The construction method for adding floor slabs to old residential buildings according to claim 2 is characterized in that: The prefabricated floor slab body (11) comprises a steel structure side beam (111) and a floor slab structure (112), wherein the steel structure side beam (111) is connected to the bottom of the floor slab structure (112); and step S4 comprises: S41, fixedly connecting the steel structure side beam (111) to the original beam structure (10) of the current floor; S42, fixedly connecting the floor structure (112) to the original concrete floor (20) of the current floor.

5. The construction method for adding floor slabs to old residential buildings according to claim 4 is characterized in that: The original beam structure (10) is a steel structure beam; the step S41 specifically comprises: A connecting steel plate (30) is fixed to the installation area of ​​the original beam structure (10), and the steel structure side beam (111) is welded to the connecting steel plate (30).

6. The construction method for adding floor slabs to old residential buildings according to claim 4 is characterized in that: The original beam structure (10) is a concrete beam; the step S41 specifically comprises: A post-embedded component (40) is arranged in the installation area of ​​the original beam structure (10), and the post-embedded component (40) is partially extended out of the original beam structure (10), and the steel structure side beam (111) is welded to the extended portion of the post-embedded component (40) relative to the original beam structure (10).

7. The construction method for adding floor slabs to old residential buildings according to claim 4 is characterized in that: The steel structure side beam (111) is configured as two I-beam side beams, the two I-beam side beams are spaced apart along a first direction at two sides of the bottom of the floor structure (112), and the support plate (12) and the support connector (13) are respectively detachably connected to opposite ends of the I-beam side beam along its own length direction.

8. The construction method for adding floor slabs to old residential buildings according to any one of claims 4 to 7, characterized in that: The floor structure (112) includes a cast-in-place composite floor area (1121) and a prefabricated PC floor area (1122), wherein the cast-in-place composite floor area (1121) is configured as a steel truss formwork, and the cast-in-place composite floor area (1121) is closer to the original concrete floor (20) than the prefabricated PC floor area (1122).

9. The construction method for adding floor slabs to old residential buildings according to claim 8 is characterized in that: The prefabricated PC floor slab area (1122) has internal steel bars (50) and the internal steel bars (50) extend to the cast-in-place composite floor slab area (1121); the step S42 specifically includes: Post-embedded reinforcement (60) is arranged in the installation area of ​​the original concrete slab (20), and the post-embedded reinforcement (60) is partially extended out of the original concrete slab (20), and the internal steel bars (50) at the cast-in-place composite slab area (1121) are welded to the extended portion of the post-embedded reinforcement (60) relative to the original concrete slab (20).

10. The construction method for adding floor slabs to old residential buildings according to claim 1, characterized in that: Before step S1, the method further includes: Carry out pre-processing on the installation area of ​​each floor.

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