Construction method of passive building external cantilever plate heat preservation energy-saving structure

Abstract

The application discloses a construction method of a passive building outer overhanging plate heat preservation energy-saving structure. The overhanging plate heat preservation energy-saving structure comprises a structural beam, a window lower wall body connected to a structural floor on the top of the structural beam, an overhanging plate connected to the outer side of the structural floor and the structural beam, a filling beam arranged on the overhanging plate, filling materials filled between the filling beams and a beam lower heat preservation layer connected to the outer side of the structural beam and located below the overhanging plate. The setting of the filling materials is beneficial to guaranteeing the heat preservation of the top of the overhanging plate. The setting of the filling beams is beneficial to guaranteeing the effective laying and fixing of the filling materials. The setting of the drainage ditch, the drainage connecting pipe and the main drainage pipe is beneficial to waterproofing and drainage, and the filling beams are used for the hidden setting of pipelines. The setting of the overhanging plate steel bars and the structural beam steel bars is beneficial to guaranteeing the final bearing of the overhanging plate and effectively guaranteeing the support of the upper structure of the overhanging plate.

Description

Technical Field

[0001] This invention relates to the field of passive building construction technology, and in particular to a construction method for a passive building external cantilever slab thermal insulation and energy-saving structure. Background Technology

[0002] Cantilevered eaves refer to the portion of the roof that extends beyond the exterior wall, also serving a protective function for the exterior wall. Traditionally, cantilevered slabs in buildings are not insulated, but the overall thermal conductivity of the cantilevered slab is very high, failing to meet the insulation requirements of energy-efficient buildings. Even with insulation on traditional cantilevered slabs, the insulation installation requires covering the entire slope of the eaves, making construction difficult, requiring large amounts of material, and significantly increasing costs. In passive building construction, ensuring the secure installation of insulation materials, the load-bearing capacity of the cantilevered slab, and the corresponding waterproofing at the cantilevered slab all require specific design considerations. Summary of the Invention

[0003] This invention provides a construction method for a passive building external cantilever slab insulation and energy-saving structure to solve technical problems such as insulation, waterproofing and fixing on cantilever slabs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The passive building cantilever slab insulation and energy-saving structure includes a structural beam, a window wall connected to the structural floor slab at the top of the structural beam, a cantilever slab connected to the outside of the structural floor slab and the structural beam, an infill beam set on the cantilever slab, infill material filled between the infill beams, and a beam insulation layer connected to the outside of the structural beam and located below the cantilever slab. A structural beam includes structural beam concrete and structural beam reinforcing steel bars placed inside the structural beam concrete. The structural floor slab includes a main structural slab, longitudinal reinforcement bars of the structural slab inside the main structural slab, and transverse reinforcement bars of the structural slab inside the main structural slab and located below the longitudinal reinforcement bars of the structural slab. The cantilever slab includes a cantilever main board, bottom longitudinal ribs and bottom transverse ribs provided below the cantilever main board, and top longitudinal ribs and top transverse ribs provided at the top of the cantilever main board. The construction method and specific steps for passive building cantilever slab insulation and energy-saving structures are as follows: Step 1: Construct structural beams and structural floor slabs. When constructing structural beams, extend the structural beam reinforcement at the cantilever slab connection and pre-connect one end of the bottom longitudinal reinforcement and the top longitudinal reinforcement of the cantilever. Step 2: Tie the bottom longitudinal reinforcement, bottom transverse reinforcement, top longitudinal reinforcement, and top transverse reinforcement of the cantilever slab, and set up the formwork together with the cantilever slab at the infill beam. Step 3: Pre-embed the main drainage pipe and drainage connection pipe at the infill beam, and check the inclination angle of the pre-embedded main drainage pipe and drainage connection pipe according to the design. Step 4: After the cantilever slab and infill beam have been poured and cured, construct the insulation layer under the wall and beam below the window, and then lay the filling material on top of the cantilever slab in the space divided by the infill beam. Step 5: A drainage ditch is installed at the junction of the top of the infill material and the wall below the window, and the drainage ditch is sealed and waterproofed to the drainage connection pipe; this completes the construction of the passive building cantilever slab insulation and energy-saving structure.

[0005] Furthermore, the filling beam is T-shaped and cast with plain concrete. The horizontal part is arranged in the same direction as the long axis of the main structural board and is located on the side of the short axis of the main structural board near the extended end. The main drainage pipe is pre-embedded on the inner side of the horizontal part. The vertical part of the T-shaped filling beam is arranged in the same direction as the short axis of the main structural board and has a pre-embedded drainage connection pipe.

[0006] Furthermore, the filling material is a lightweight insulating material. The filling material is pre-modeled in three dimensions according to the space divided by the filling beam to simulate and determine the space of the filling material, thereby pre-fabricating the filling material and then installing it on site; and a waterproof layer is set on the top of the filling material.

[0007] Furthermore, the under-beam insulation layer includes an under-beam insulation board and an under-beam insulation panel connected to the outside of the insulation board. The under-beam insulation layer is constructed as a whole with the wall under the window. Openings are pre-reserved at the cantilever slab, and a sealing layer and a waterproof layer are installed at the cantilever connection during on-site installation.

[0008] Furthermore, the main drainage pipe and drainage ditch are arranged along the length of the main structural plate and both are inclined from the middle to both sides, with the middle being higher and the sides being lower; the side of the drainage connecting pipe connected to the drainage ditch is higher than the side connected to the main drainage pipe, and the drainage connecting pipes are spaced apart along the length of the main structural plate.

[0009] Furthermore, the structural beams and structural floor slabs are arranged in a T-shape, the longitudinal reinforcement of the structural floor slab is located at the top of the structural floor slab, and at least one transverse reinforcement is provided at the corner of the outer edge of the top of the structural floor slab; the transverse reinforcement of the structural floor slab is arranged along the length of the structural beams.

[0010] Furthermore, the structural beam reinforcement includes vertical reinforcement and horizontal reinforcement integrally connected to the vertical reinforcement. The vertical reinforcement and horizontal reinforcement are vertically connected. The vertical reinforcement is located on the side of the structural beam concrete away from the cantilever slab, and the horizontal reinforcement extends towards the cantilever slab with a length not less than the beam width.

[0011] Furthermore, the cantilever bottom longitudinal reinforcement includes a cantilever bottom horizontal reinforcement and a cantilever bottom inclined reinforcement integrally connected to the cantilever bottom horizontal reinforcement, wherein one end of the cantilever bottom horizontal reinforcement extends into the concrete of the structural beam, and the other end is set at the bending point of the cantilever slab; the cantilever bottom inclined reinforcement extends into the short middle of the main structural slab.

[0012] Furthermore, the cantilever top longitudinal reinforcement includes a cantilever top inclined reinforcement and a cantilever top vertical reinforcement integrally connected with the cantilever top inclined reinforcement. The cantilever top inclined reinforcement extends into the concrete of the structural beam and intersects with the horizontal reinforcement of the structural beam. The cantilever top inclined reinforcement is arranged along the short length of the main structural plate. The cantilever top vertical reinforcement is arranged vertically at the extended end of the main structural plate. The cantilever top inclined bar and the cantilever bottom inclined bar are respectively provided with cantilever top horizontal bar and cantilever bottom horizontal bar, and the cantilever top horizontal bar is provided along the entire length of the main structural board.

[0013] The beneficial effects of this invention are reflected in: 1) The present invention, through the setting of filling material, helps to ensure the heat preservation of the top of the cantilever slab; and through the setting of filling beams, it helps to ensure the effective laying and fixing of the filling material; 2) The drainage ditch, drainage connection pipe and main drainage pipe of the present invention are designed to ensure waterproofing at the top of the cantilever slab and at the window, and the pipeline is concealed by using the infill beam; moreover, this measure can be combined with the wall insulation layer to effectively solve the thermal bridging effect. 3) The present invention, through the arrangement of the reinforcing bars of the cantilever slab and the structural beam, helps to ensure the final load-bearing capacity of the cantilever slab and effectively ensures the support of the upper structure of the cantilever slab.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a passive building's external cantilever slab insulation and energy-saving structure. Figure 1 ; Figure 2 This is a schematic diagram of a passive building's external cantilever slab insulation and energy-saving structure. Figure 2 ; Figure 3 This is a schematic diagram of the steel reinforcement structure of the structural beam; Figure 4 This is a schematic diagram of the cantilever bottom longitudinal reinforcement structure; Figure 5 This is a schematic diagram of the cantilever top longitudinal reinforcement structure; Figure 6 This is a schematic diagram of the infill beam and the distribution of the infill material; Figure 7 This is a schematic diagram of the drainage ditch and its connecting structure; Figure 8 This is a schematic diagram of the connection structure of the main drainage pipe, drainage ditch, and drainage connecting pipe.

[0016] Attached reference numerals: 1-Structural beam, 11-Structural beam concrete, 12-Structural beam reinforcement, 121-Structural beam vertical reinforcement, 122-Structural beam horizontal reinforcement, 2-Structural floor slab, 21-Structural main plate, 22-Structural slab longitudinal reinforcement, 23-Structural slab transverse reinforcement, 3-Wall under window, 31-Insulation core board, 32-Exterior wall panel, 4-Cantilever slab, 41-Cantilever main plate, 42-Cantilever bottom longitudinal reinforcement, 421-Cantilever bottom horizontal reinforcement, 422-Cantilever bottom diagonal reinforcement, 43-Cantilever bottom transverse reinforcement, 44-Cantilever top longitudinal reinforcement, 441-Cantilever top diagonal reinforcement, 442-Cantilever top vertical reinforcement, 45-Cantilever top transverse reinforcement, 5-Insulation beam, 6-Insulation material, 7-Beam under insulation layer, 71-Beam under insulation board, 72-Beam under insulation panel, 8-Main drainage pipe, 9-Drainage ditch, 10-Drainage connection pipe. Detailed Implementation

[0017] Taking the construction of a kindergarten project as an example, such as Figures 1 to 8 As shown, the construction method of the passive building external cantilever slab thermal insulation and energy-saving structure includes a structural beam 1, a window-under-wall 3 connected to the structural floor slab 2 at the top of the structural beam 1, a cantilever slab 4 connected to the outside of the structural floor slab 2 and the structural beam 1, an infill beam 5 set on the cantilever slab 4, an infill material 6 filling the space between the infill beams 5, and a beam-under-insulation layer 7 connected to the outside of the structural beam 1 and located below the cantilever slab 4.

[0018] In this embodiment, the structural beam 1 and the structural floor slab 2 are arranged in a T-shape. The longitudinal reinforcement 22 of the structural floor slab is located at the top of the structural floor slab 2, and at least one transverse reinforcement 23 of the structural floor slab is located at the corner of the outer edge of the top of the structural floor slab 2. The transverse reinforcement 23 of the structural floor slab is arranged along the length of the structural beam 1.

[0019] In this embodiment, the structural floor slab 2 includes a main structural board 21, longitudinal reinforcement 22 disposed inside the main structural board 21, and transverse reinforcement 23 disposed inside the main structural board 21 and located below the longitudinal reinforcement 22.

[0020] In this embodiment, the structural beam 1 includes a structural beam concrete 11 and structural beam reinforcing bars 12 disposed inside the structural beam concrete 11; the structural beam reinforcing bars 12 include structural beam vertical bars 121 and structural beam horizontal bars 122 integrally connected with the structural beam vertical bars 121. The structural beam vertical bars 121 and structural beam horizontal bars 122 are vertically connected, wherein the structural beam vertical bars 121 are disposed on the side of the structural beam concrete 11 away from the cantilever slab 4, and the structural beam horizontal bars 122 extend toward the cantilever slab 4 with an extension length not less than the beam width.

[0021] In this embodiment, the cantilever slab 4 includes a cantilever main plate 41, cantilever bottom longitudinal reinforcement 42 and cantilever bottom transverse reinforcement 43 disposed below the cantilever main plate 41, and cantilever top longitudinal reinforcement 44 and cantilever top transverse reinforcement 45 disposed at the top of the cantilever main plate 41. The cantilever bottom longitudinal reinforcement 42 includes a cantilever bottom horizontal reinforcement 421 and a cantilever bottom diagonal reinforcement 422 integrally connected to the cantilever bottom horizontal reinforcement 421, wherein one end of the cantilever bottom horizontal reinforcement 421 extends into the concrete 11 of the structural beam, and the other end is disposed at the bending point of the cantilever slab 4; the cantilever bottom diagonal reinforcement 422 extends into the short middle of the structural main plate 21. The cantilever bottom longitudinal reinforcement 42 has a diameter of 8mm and is disposed at intervals of 150mm.

[0022] In this embodiment, the cantilever top longitudinal reinforcement 44 includes a cantilever top inclined reinforcement 441 and a cantilever top vertical reinforcement 442 integrally connected to the cantilever top inclined reinforcement 441. The cantilever top inclined reinforcement 441 extends into the concrete 11 of the structural beam and is arranged to cross the horizontal reinforcement 122 of the structural beam. The cantilever top inclined reinforcement 441 is arranged along the short length of the main structural plate 21. The cantilever top vertical reinforcement 442 is arranged vertically at the extended end of the main structural plate 21. The cantilever top inclined bar 441 and the cantilever bottom inclined bar 422 are respectively provided with cantilever top horizontal bars 45 and cantilever bottom horizontal bars 43. The cantilever top horizontal bar 45 is set along the entire length of the structural main plate 21. The diameter of the cantilever top longitudinal bar 44 is larger than that of the cantilever bottom longitudinal bar 42. The diameter of the cantilever top longitudinal bar 44 is 10mm, and it is set at intervals of 150mm; the cantilever top horizontal bar 45 is also provided.

[0023] In this embodiment, the filling beam 5 is T-shaped and cast with plain concrete. The horizontal part is arranged in the same direction along the long direction of the main structural board 21 and is located on the side of the main structural board 21 near the extended end in the short direction. The main drainage pipe 8 is pre-embedded on the inner side of the horizontal part. The T-shaped vertical part of the filling beam 5 is arranged in the same direction along the short direction of the main structural board 21 and a drainage connection pipe 10 is pre-embedded.

[0024] In this embodiment, the filler material 6 is a lightweight insulating material with a density ≤24KN / m³. 3 The space of the filling material 6 is divided according to the space of the filling beam 5. The space of the filling material 6 is simulated and determined in advance by three-dimensional modeling, and the filling material 6 is prefabricated and then installed on site; and a waterproof layer is set on the top of the filling material 6.

[0025] In this embodiment, the under-beam insulation layer 7 includes an under-beam insulation board 71 and an under-beam insulation panel 72 connected to the outside of the insulation board. The under-beam insulation layer 7 is constructed integrally with the window-under-wall 3. Openings are pre-reserved at the cantilever slab 4, and a sealing layer and a waterproof layer are installed at the cantilever joint during on-site installation. The window-under-wall 3 includes an insulation core board 31 and an outer wall panel connected to the outside of the insulation core board 31.

[0026] In this embodiment, the main drain pipe 8 and the drain ditch 9 are arranged along the length of the main structural plate 21 and both are arranged at an angle from the middle to both sides, with the middle being higher and the sides being lower; the side of the drain connecting pipe 10 connected to the drain ditch 9 is higher than the side connected to the main drain pipe 8, and the drain connecting pipe 10 is spaced apart along the length of the main structural plate 21.

[0027] like Figures 1 to 8 As shown, the construction method for a passive building's external cantilever slab insulation and energy-saving structure includes the following specific steps: Step 1: Construct structural beam 1 and structural floor slab 2. When constructing structural beam 1, extend the structural beam reinforcement 12 at the connection of cantilever slab 4 and pre-connect one end of the bottom longitudinal reinforcement 42 and the top longitudinal reinforcement 44 of the cantilever.

[0028] Step 2: Tie the bottom longitudinal reinforcement 42, bottom transverse reinforcement 43, top longitudinal reinforcement 44, and top transverse reinforcement 45 of the cantilever slab 4, and set up the formwork together with the cantilever slab 4 at the infill beam 5.

[0029] Step 3: Pre-embed the main drainage pipe 8 and drainage connection pipe 10 at the filling beam 5, and check the inclination angle of the pre-embedded main drainage pipe 8 and drainage connection pipe 10 according to the design.

[0030] Step 4: After the cantilever slab 4 and the infill beam 5 have been poured and cured, construct the wall 3 under the window and the insulation layer 7 under the beam. Then, lay the filling material 6 on top of the cantilever slab 4 within the space divided by the infill beam 5. The top of the wall 3 under the window is also equipped with reinforcing bars anchored into the main structure on both sides. The reinforcing bars are arranged in an L-shape and have long longitudinal bars.

[0031] Step 5: A drainage ditch 9 is installed at the junction of the top of the filling material 6 and the wall 3 below the window, and the drainage ditch 9 is sealed and waterproofed to the drainage connection pipe 10; thus completing the construction of the passive building cantilever slab thermal insulation and energy-saving structure.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for a passive building cantilever slab thermal insulation and energy-saving structure, characterized in that, The passive building cantilever slab insulation and energy-saving structure includes a structural beam (1), a window wall (3) connected to the top of the structural beam (1) on the structural floor slab (2), a cantilever slab (4) connected to the outside of the structural floor slab (2) and the structural beam (1), an infill beam (5) set on the cantilever slab (4), an infill material (6) filled between the infill beams (5), and a beam under-insulation layer (7) connected to the outside of the structural beam (1) and located below the cantilever slab (4). The structural beam (1) includes structural beam concrete (11) and structural beam steel bars (12) disposed inside the structural beam concrete (11). The structural floor slab (2) includes a main structural board (21), longitudinal reinforcement (22) of the structural board inside the main structural board (21), and transverse reinforcement (23) of the structural board inside the main structural board (21) and located below the longitudinal reinforcement (22). The cantilever slab (4) includes a cantilever main plate (41), a cantilever bottom longitudinal rib (42) and a cantilever bottom transverse rib (43) provided below the cantilever main plate (41), and a cantilever top longitudinal rib (44) and a cantilever top transverse rib (45) provided at the top of the cantilever main plate (41). The construction method and specific steps for passive building cantilever slab insulation and energy-saving structures are as follows: Step 1: Construct structural beam (1) and structural floor slab (2). When constructing structural beam (1), extend the structural beam reinforcement (12) at the connection of cantilever slab (4) and pre-connect one end of the bottom longitudinal reinforcement (42) and the top longitudinal reinforcement (44) of the cantilever. Step 2: Tie the bottom longitudinal reinforcement (42), bottom transverse reinforcement (43), top longitudinal reinforcement (44), and top transverse reinforcement (45) of the cantilever slab (4), and set up the formwork together with the cantilever slab (4) at the filling beam (5); Step 3: Pre-embed the main drainage pipe (8) and drainage connection pipe (10) at the filling beam (5), and check the inclination angle of the pre-embedded main drainage pipe (8) and drainage connection pipe (10) according to the design; Step 4: After the cantilever slab (4) and the infill beam (5) are poured and cured, construct the wall (3) under the window and the insulation layer (7) under the beam, and then lay the filling material (6) on the top of the cantilever slab (4) and in the space divided by the infill beam (5). Step 5: A drainage ditch (9) is set at the junction of the top of the filling material (6) and the wall (3) under the window, and the drainage ditch (9) is sealed and waterproofed to the drainage connection pipe (10); thus completing the construction of the passive building cantilever slab thermal insulation and energy-saving structure.

2. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 1, characterized in that, The filling beam (5) is T-shaped and cast with plain concrete. The horizontal part is set along the long direction of the main structural board (21) and is located on the side of the main structural board (21) near the extended end in the short direction. The main drainage pipe (8) is pre-embedded on the inner side of the horizontal part. The T-shaped vertical part of the filling beam (5) is set along the short direction of the main structural board (21) and a drainage connection pipe (10) is pre-embedded.

3. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 2, characterized in that, The filling material (6) is a thermal insulation lightweight material. The filling material (6) is pre-modeled in three dimensions according to the space divided by the filling beam (5) to simulate and determine the space of the filling material (6), thereby pre-fabricating the filling material (6) and then installing it on site; and a waterproof layer is set on the top of the filling material (6).

4. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 1, characterized in that, The beam insulation layer (7) includes the beam insulation board (71) and the beam insulation panel (72) connected to the outside of the insulation board. The beam insulation layer (7) is constructed as a whole with the wall under the window (3). An opening is reserved in advance at the cantilever slab (4). When installing on site, a sealing layer and a waterproof layer are set at the cantilever connection.

5. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 1, characterized in that, The main drain pipe (8) and the drain ditch (9) are arranged along the length of the main structural plate (21) and both are arranged at an angle from the middle to both sides, with the middle being higher and the sides being lower; the drain connecting pipe (10) is higher on the side connected to the drain ditch (9) than on the side connected to the main drain pipe (8), and the drain connecting pipe (10) is spaced apart along the length of the main structural plate (21).

6. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 1, characterized in that, The structural beam (1) and the structural floor slab (2) are arranged in a T-shape. The longitudinal reinforcement (22) of the structural floor slab is set at the top of the structural floor slab (2), and at least one transverse reinforcement (23) of the structural floor slab is set at the corner of the outer edge of the top of the structural floor slab (2). The transverse reinforcement (23) of the structural floor slab is arranged along the length of the structural beam (1).

7. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 6, characterized in that, The structural beam reinforcement (12) includes structural beam vertical reinforcement (121) and structural beam horizontal reinforcement (122) integrally connected with structural beam vertical reinforcement (121). Structural beam vertical reinforcement (121) and structural beam horizontal reinforcement (122) are vertically connected. Structural beam vertical reinforcement (121) is set on the side of structural beam concrete (11) away from cantilever slab (4). Structural beam horizontal reinforcement (122) extends to the side of cantilever slab (4) and the extension length is not less than the beam width.

8. The construction method of a passive building external cantilever slab thermal insulation and energy-saving structure as described in claim 7, characterized in that, The cantilever bottom longitudinal reinforcement (42) includes a cantilever bottom horizontal reinforcement (421) and a cantilever bottom inclined reinforcement (422) integrally connected with the cantilever bottom horizontal reinforcement (421). One end of the cantilever bottom horizontal reinforcement (421) extends into the concrete (11) of the structural beam, and the other end is set at the bending point of the cantilever slab (4). The cantilever bottom inclined reinforcement (422) extends into the short middle of the main structural slab (21).

9. The construction method of a passive building cantilever slab thermal insulation and energy-saving structure as described in claim 8, wherein the cantilever top longitudinal reinforcement (44) includes a cantilever top inclined reinforcement (441) and a cantilever top vertical reinforcement (442) integrally connected with the cantilever top inclined reinforcement (441), wherein, The cantilever top diagonal reinforcement (441) extends into the concrete (11) of the structural beam and intersects with the horizontal reinforcement (122) of the structural beam. The cantilever top diagonal reinforcement (441) is set along the short length of the main structural plate (21). The cantilever top vertical reinforcement (442) is set vertically at the end of the extended end of the main structural plate (21). The cantilever top inclined bar (441) and cantilever bottom inclined bar (422) are respectively provided with cantilever top horizontal bar (45) and cantilever bottom horizontal bar (43), and the cantilever top horizontal bar (45) is provided along the entire length of the main structural board (21).

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