Waterproof structure of eaves and construction method thereof

Abstract

The application discloses a structure of a waterproof corner and a construction method thereof, wherein the building main structure comprises a basement roof, a podium outer wall, a cantilever plate and a cantilever plate reverse ridge connected in sequence, the waterproof structure comprises a negative corner waterproof additional layer, a basement roof waterproof layer and a podium outer wall waterproof layer, and the protection structure of the waterproof structure comprises a concrete waterproof protection layer, a brick wall, a concrete gap filler and a water disperser arranged in sequence. The application ensures the waterproof effect of the negative corner at the bottom of the basement, guarantees the firmness and waterproof tightness of the closing of the waterproof structure of the side surface of the cantilever plate reverse ridge, and can continuously and completely cover and protect the waterproof structure of the top surface of the basement roof, the side surface of the podium outer wall, the bottom surface of the cantilever plate and the lower part of the side surface of the cantilever plate reverse ridge.

Description

TECHNICAL FIELD

[0001] The present application relates to building waterproofing, in particular to a corner pressing waterproof structure and a construction method thereof. BACKGROUND

[0002] The corner pressing part is a difficult point in building waterproofing construction, and the following problems exist: 1) the waterproof effect of the bottom corner of the basement is poor, and water leakage is prone to occur; 2) the closing height of the waterproof structure of the side surface of the cantilever plate reverse ridge is not uniform and imperfect, and waterproof closing cracks are prone to occur, resulting in waterproof failure; 3) the backfilling of the cantilever plate is not solid, and cavities are formed after a long time, which are prone to cause waterproof hollowing, resulting in failure of the waterproof structure of the bottom surface of the cantilever plate; the waterproof structure of the bottom corner of the lower end of the cantilever plate reverse ridge is not protected, and water leakage is prone to occur; 4) there is no continuous protection structure on the top surface of the basement roof, the side surface of the outer wall of the protection plinth, the bottom surface of the cantilever plate, and the side surface of the cantilever plate reverse ridge. SUMMARY

[0003] The purpose of the present application is to provide a corner pressing waterproof structure and a construction method thereof, which ensures the waterproof effect of the bottom corner of the basement, guarantees the firmness and waterproof tightness of the closing of the waterproof structure of the side surface of the cantilever plate reverse ridge, and continuously covers and protects the waterproof structure of the top surface of the basement roof, the side surface of the outer wall of the plinth, the bottom surface of the cantilever plate, and the lower part of the side surface of the cantilever plate reverse ridge.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A corner pressing waterproof structure, a plaster transition is arranged at the corner between the basement roof and the outer wall of the plinth, and a waterproof additional layer is arranged at the corner; a waterproof layer of the basement roof and a waterproof protection layer of concrete are arranged in sequence on the top surface of the basement roof; a waterproof layer of the outer wall of the plinth is arranged on the side surface of the outer wall of the plinth; the waterproof layer of the basement roof extends to the side surface of the outer wall of the plinth through the waterproof additional layer; the lower end of the waterproof layer of the outer wall of the plinth is lapped on the waterproof layer of the basement roof; the upper end of the waterproof layer of the outer wall of the plinth extends to the closing groove on the upper part of the side surface of the cantilever plate reverse ridge, and is fixed by a pressing strip and a tight nail, and is sealed by a sealing paste; a brick wall is arranged at the position close to the wall between the basement roof and the cantilever plate; a concrete gap filler is arranged between the lower side of the cantilever plate and the backfilling soil; a downspout is arranged at the position of the side surface of the cantilever plate reverse ridge; the back surface of the brick wall covers and protects the waterproof structure of the side surface of the outer wall of the plinth, the top surface covers and protects the waterproof structure of the part of the bottom surface of the cantilever plate close to the outer wall of the plinth, and the bottom surface covers and protects the waterproof structure of the plaster transition and the top surface of the basement roof connected thereto; the concrete gap filler covers and protects the waterproof structure of the remaining part of the bottom surface of the cantilever plate; the downspout and the concrete gap filler combine to cover the bottom corner of the lower end of the cantilever plate reverse ridge; and the downspout covers and protects the waterproof structure of the lower part of the side surface of the cantilever plate reverse ridge.

[0006] Preferably, the waterproof layer of the basement roof is made of a non-solidified asphalt waterproof coating layer and a SBS asphalt pre-laid reverse-sticking waterproof roll material, the waterproof layer of the podium outer wall is made of a water-based anti-slippage waterproof coating layer and a SBS asphalt self-sticking waterproof roll material, the non-solidified asphalt waterproof coating layer and the SBS asphalt pre-laid reverse-sticking waterproof roll material are extended to the side of the podium outer wall through the additional waterproof layer of the internal corner, and the lower ends of the water-based anti-slippage waterproof coating layer and the SBS asphalt self-sticking waterproof roll material are overlapped on the non-solidified asphalt waterproof coating layer and the SBS asphalt pre-laid reverse-sticking waterproof roll material respectively.

[0007] Preferably, the additional waterproof layer of the internal corner is made of a non-solidified asphalt waterproof coating layer and a SBS asphalt pre-laid reverse-sticking waterproof roll material.

[0008] Preferably, the plaster transition is made of fine stone concrete.

[0009] Preferably, the concrete waterproof protection layer is provided with a built-in steel mesh, and the concrete waterproof protection layer is provided with a cutting joint at intervals.

[0010] Preferably, the weather strip is made of aluminum alloy material, and the weather strips are distributed at intervals.

[0011] Preferably, the cornice support is on the cornice foundation.

[0012] The construction method of the above-mentioned corner pressing waterproof structure first pours the basement roof, the first floor building base outer wall, the cantilevered plate and the cantilevered plate reverse ridge, reserves a closing groove on the upper part of the side surface of the cantilevered plate reverse ridge, then cleans the base layer and the closing groove; then sets the plastering transition between the basement roof and the building base outer wall; then constructs the additional waterproof layer of the inside corner, the additional waterproof layer of the inside corner covers the plastering transition area and the connected basement roof and building base outer wall; then constructs the waterproof layer of the basement roof, the waterproof layer of the basement roof extends to the side surface of the building base outer wall through the additional waterproof layer of the inside corner; then conducts the closed water test on the basement; then lays the concrete waterproof protection layer on the top surface of the basement roof; then constructs the waterproof layer of the building base outer wall, so that the lower end of the waterproof layer of the building base outer wall is lapped on the waterproof layer of the basement roof; then the upper end of the waterproof layer of the building base outer wall extends to the closing groove in the upper part of the side surface of the cantilevered plate reverse ridge through the bottom surface of the cantilevered plate, and is first fixed by the pressing strip and the fastening part and then sealed by the sealing paste; then the brick wall is built at the position between the basement roof and the cantilevered plate and close to the wall, so that the back surface of the brick wall covers and protects the waterproof structure of the side surface of the building base outer wall, the top surface covers and protects the waterproof structure of the part of the bottom surface of the cantilevered plate close to the building base outer wall, and the bottom surface covers and protects the waterproof structure of the top surface of the basement roof and the plastering transition connected thereto; then the backfill soil is spread and tamped layer by layer on the basement roof, until the concrete filler is poured when reaching below the bottom surface of the cantilevered plate, and then the backfill soil is continued to be filled to the design elevation, the water scattering foundation is constructed by reverse grooving, and the water scattering is constructed, so that the water scattering and the concrete filler combine to cover the outside corner of the lower end of the cantilevered plate reverse ridge, the waterproof structure of the remaining part of the bottom surface of the cantilevered plate covered and protected by the concrete filler, and the waterproof structure of the lower part of the side surface of the cantilevered plate reverse ridge covered and protected by the water scattering.

[0013] Preferably, before pouring the main body structure, when the cantilevered plate reverse ridge formwork is erected, the two side formworks are connected by back lath through opposite pull bolts, and a forming strip for forming the closing groove is fixed on the inner surface of one side formwork.

[0014] The beneficial effects of the present application are:

[0015] The shadow corner between the basement roof and the podium outer wall is not only provided with plaster transition but also laid with a shadow corner waterproof additional layer, so as to avoid damage of the waterproof material and additionally increase a layer of waterproof within the waterproof layer of the basement roof, and the brick wall can also cover the plaster transition and the waterproof structure on the top surface of the connected basement roof, so as to ensure the waterproof effect of the shadow corner at the bottom of the basement; the closing of the waterproof structure of the cantilevered slab reverse ridge side surface adopts the combination of a closing groove, a pressing strip, a fastening piece and sealing paste, so as to ensure the firmness and waterproof tightness of the closing, avoid cracking of the waterproof closing and reduce the occurrence of leakage hidden trouble of the corner; the concrete gap filler can fill the cavity between the lower side of the cantilevered slab and the backfill soil, so as to solve the problem of exposure of the waterproof structure caused by the non-actual settlement of the backfill under the cantilevered slab and also protect the waterproof structure on the bottom surface of the cantilevered slab together with the brick wall; the downspout cooperates with the concrete gap filler to protect the waterproof structure on the lower part and the lower end of the cantilevered slab reverse ridge side surface; the concrete waterproof protective layer, the brick wall, the concrete gap filler and the downspout are sequentially arranged to continuously protect the waterproof structure on the top surface of the basement roof, the plaster transition, the side surface of the podium outer wall, the bottom surface of the cantilevered slab and the lower part of the cantilevered slab reverse ridge side surface, so as to form a continuous protection structure and improve the protection performance of the waterproof structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of a corner waterproof structure.

[0017] Figure 2 is a schematic view of a corner waterproof closing.

[0018] Figure 3 is a schematic view of a cantilevered slab reverse ridge formwork.

[0019] In the figure: 1-outdoor ground; 2-non-cured asphalt waterproof coating layer; 3-SBS asphalt pre-paved reverse-sticking waterproof roll material; 4-concrete waterproof protective layer; 5-basement roof; 6-plaster transition; 7-shadow corner waterproof additional layer; 8-podium outer wall; 9-water-based anti-slippage waterproof coating layer; 10-SBS asphalt self-sticking waterproof roll material; 11-brick wall; 12-cantilevered slab; 13-cantilevered slab reverse ridge; 14-pressing strip; 15-backfill soil; 16-downspout foundation; 17-downspout; 18-concrete gap filler; 19-molding strip; 20-back rabbet; 21-pull bolt; 22-sealing paste. DETAILED DESCRIPTION

[0020] The application will be further described below in combination with the drawings and examples.

[0021] Example 1

[0022] The example discloses a corner waterproof structure, like Figure 1As shown, the building main structure comprises the basement roof 5, the podium outer wall 8, the cantilevered plate 12 and the cantilevered plate counter 13 connected in sequence, the waterproof structure comprises the inside corner waterproof additional layer 7, the basement roof 5 waterproof layer and the podium outer wall waterproof layer, and the protection structure of the waterproof structure comprises the concrete waterproof protection layer 4, the brick wall 11, the concrete gap filler 18 and the cornice 17. Among them:

[0023] The inside corner between the basement roof 5 and the podium outer wall 8 is provided with the plastered transition 6, the inside corner waterproof additional layer 7 is laid on the plastered transition 6 and the connected basement roof 5 and podium outer wall 8, see Figure 1 ;

[0024] The basement roof 5 waterproof layer and the concrete waterproof protection layer 4 are laid on the top surface of the basement roof 5 in sequence, and the basement roof 5 waterproof layer extends to the side surface of the podium outer wall 8 through the inside corner waterproof additional layer 7, see Figure 1 ;

[0025] The podium outer wall waterproof layer is laid on the side surface of the podium outer wall 8, and the lower end of the podium outer wall waterproof layer is overlapped on the basement roof 5 waterproof layer, the upper end of the podium outer wall waterproof layer extends to the upper part of the closed groove on the side surface of the cantilevered plate counter 13 through the bottom surface of the cantilevered plate 12, see Figure 1 , and the upper end of the podium outer wall waterproof layer is fixed by the batten 14 and the close-nail piece in the closed groove, and is sealed by the sealing paste 22, see Figure 2 ;

[0026] The brick wall 11 is arranged between the basement roof 5 and the cantilevered plate 12 at the position close to the wall, the back surface of the brick wall 11 is attached to cover the waterproof structure protecting the side surface of the podium outer wall 8, the top surface is attached to cover the waterproof structure protecting the part of the bottom surface of the cantilevered plate 12 close to the podium outer wall 8, and the bottom surface is attached to cover the waterproof structure of the top surface of the connected basement roof 5, see Figure 1 ;

[0027] The concrete gap filler 18 is arranged between the lower side of the cantilevered plate 12 and the backfill soil 15, and the concrete gap filler 18 is attached to cover the waterproof structure protecting the remaining part of the bottom surface of the cantilevered plate 12, see Figure 1 ;

[0028] The cornice 17 is arranged at the position of the side surface of the cantilevered plate counter 13, the cornice 17 and the concrete gap filler 18 are combined to cover the lower end of the cantilevered plate counter 13, and the cornice 17 is attached to cover the waterproof structure protecting the lower part of the side surface of the cantilevered plate counter 13, see Figure 1 .

[0029] Regarding the setting of the inside corner waterproof additional layer 7, the basement roof 5 waterproof layer and the podium outer wall waterproof layer, in the embodiment, preferably: as Figure 1As shown, the waterproof layer of the basement roof 5 adopts the non-cured asphalt waterproof coating layer 2 and the SBS asphalt pre-laid reverse-sticking waterproof roll 3 laid in sequence, the waterproof layer of the podium outer wall adopts the water-based anti-sliding waterproof coating layer 9 and the SBS asphalt self-sticking waterproof roll 10 laid in sequence, the non-cured asphalt waterproof coating layer 2 and the SBS asphalt pre-laid reverse-sticking waterproof roll 3 are extended to the side of the podium outer wall 8 through the additional waterproof layer 7 at the inside corner, and the lower ends of the water-based anti-sliding waterproof coating layer 9 and the SBS asphalt self-sticking waterproof roll 10 are overlapped on the non-cured asphalt waterproof coating layer 2 and the SBS asphalt pre-laid reverse-sticking waterproof roll 3 respectively; the additional waterproof layer 7 at the inside corner adopts the non-cured asphalt waterproof coating layer and the SBS asphalt pre-laid reverse-sticking waterproof roll laid in sequence. The double external waterproof system combining the coating waterproof and the roll waterproof is adopted, the overall skin-type external waterproof system is ensured, and the construction period is saved.

[0030] Regarding the setting of the plaster transition 6, in the embodiment, preferably: the plaster transition 6 adopts fine stone concrete.

[0031] Regarding the setting of the concrete waterproof protection layer 4, in the embodiment, preferably: the concrete waterproof protection layer 4 is internally provided with a steel mesh, and the concrete waterproof protection layer 4 is provided with cut joints at intervals.

[0032] Regarding the setting of the batten, in the embodiment, preferably: the batten 14 adopts an aluminum alloy material, and the battens 14 are distributed at intervals.

[0033] As shown, Figure 1 in the embodiment, preferably, the cornice 17 is supported on the cornice base 16.

[0034] Embodiment Two

[0035] The embodiment discloses a construction method of the above-mentioned inside corner waterproof structure, and specifically includes the following steps.

[0036] S1) Pouring the basement roof 5, the podium outer wall 8 of the first floor, the cantilevered plate 12 and the cantilevered plate reverse ridge 13, and reserving a closing groove on the upper side of the cantilevered plate reverse ridge 13; as shown, Figure 3 the two side forms are connected through the opposite-pulling bolts 21, one side of the form is internally fixed with a forming strip 19 for forming the closing groove, the forming strip 19 is located at a height of 300 mm above the outdoor terrace 1 and has a height of 50 mm and a width of 10 mm, the forming strip 19 can avoid slotting after pouring and ensure the uniform height of the closing groove and avoid cracking of the waterproof roll; after pouring, the basement roof 5, the podium outer wall 8, the cantilevered plate 12 and the cantilevered plate reverse ridge 13 are subjected to base cleaning, the floating slurry and impurities on the surface of the concrete are removed, and the closing groove is cleaned.

[0037] S2) Setting the plaster transition 6 at the inside corner between the basement roof 5 and the podium outer wall 8, and the plaster transition 6 adopts fine stone concrete.

[0038] S3) Construction of the corner waterproofing additional layer 7, which is made of a non-curing bituminous waterproof coating layer and a SBS bituminous pre-laid reverse-stuck waterproofing membrane, the non-curing bituminous waterproof coating layer is brushed 4 mm and covers the plastered transition area and the 250 mm range of the basement roof 5 and the 350 mm range of the podium exterior wall 8, the SBS bituminous pre-laid reverse-stuck waterproofing membrane is 3 mm thick and covers the plastered transition area 6 and the 250 mm range of the basement roof 5 and the 250 mm range of the podium exterior wall 8.

[0039] S4) Construction of the waterproof layer of the basement roof 5, which is made of a non-curing bituminous waterproof coating layer 2 and a SBS bituminous pre-laid reverse-stuck waterproofing membrane 3, both of which are extended to the side of the podium exterior wall 8 through the corner waterproofing additional layer 7, and the non-curing bituminous waterproof coating layer 2 exceeds the length of the SBS bituminous pre-laid reverse-stuck waterproofing membrane 3 by 100 mm.

[0040] S5) Water tightness test is conducted on the basement, especially the waterproofing between the basement roof 5 and the podium exterior wall 8 is carefully checked to ensure that the waterproofing material is not damaged and the lap joint is firm.

[0041] S6) Laying of the concrete waterproofing protective layer 4 on the top surface of the basement roof 5, the concrete waterproofing protective layer 4 is embedded with a steel mesh, and the concrete waterproofing protective layer 4 is treated with a 6 m interval for joint cutting, the joint cutting width is 3 mm, the depth is 1 / 3 of the thickness of the concrete waterproofing protective layer 4, and the concrete waterproofing protective layer 4 is watered and maintained to the designed strength.

[0042] S7) Construction of the waterproof layer of the podium exterior wall, which is made of a water-based anti-slippage waterproof coating layer 9 and a SBS bituminous self-adhesive waterproofing membrane 10, the water-based anti-slippage waterproof coating layer 9 is brushed 2 mm and overlaps the non-curing bituminous waterproof coating layer 2 at the lower end by 100 mm, and the SBS bituminous self-adhesive waterproofing membrane 10 overlaps the SBS bituminous pre-laid reverse-stuck waterproofing membrane 3 at the lower end by 100 mm.

[0043] S8) The upper end of the waterproof layer of the podium exterior wall is extended to the upper part of the closing groove on the side of the overhanging plate reverse ridge 13 through the bottom surface of the overhanging plate 12 and is first fixed by the compression strip 14 cooperating with the fastening piece (nail), and then sealed by the sealing paste 22, the compression strip 14 is made of aluminum alloy, the height of the compression strip 14 is 30 mm, the width is 1 mm, and the compression strip 14 is arranged with a spacing of 0.5 m.

[0044] S9) Build a 100mm thick brick wall 11 between the basement roof 5 and the cantilevered plate 12 at the wall position, the back of the brick wall 11 is attached to the waterproof structure covering the side of the podium exterior wall 8 (including the podium exterior wall waterproof layer, the basement roof 5 waterproof layer, the corner waterproof additional layer 7 in different areas), the top is attached to the waterproof structure covering the part of the cantilevered plate 12 bottom close to the podium exterior wall 8 (the podium exterior wall waterproof layer), the bottom is attached to the waterproof structure covering the plastered transition 6 and the top of the connected basement roof 5 (including the basement roof 5 waterproof layer, the corner waterproof additional layer 7).

[0045] S10) Layered paving and layered tamping backfill soil 15 on the basement roof 5, until reaching 300mm below the bottom of the cantilevered plate 12, pouring to get concrete filler 18, and then continue backfilling to the design elevation; Then reverse slotting to make a splash water foundation 16, and then perform splash water 17 construction, so that the splash water 17 and the concrete filler 18 combine to cover the cantilevered plate reverse ridge 13 lower end corner, the concrete filler 18 is attached to the waterproof structure covering the remaining part of the cantilevered plate 12 bottom (the podium exterior wall waterproof layer), and the splash water 17 is attached to the waterproof structure covering the side of the cantilevered plate reverse ridge 13 lower part (the podium exterior wall waterproof layer).

[0046] According to the schemes of the above embodiment one and embodiment two, in the present application:

[0047] The corner between the basement roof 5 and the podium exterior wall 8 is not only provided with the plastered transition 6 but also laid with the corner waterproof additional layer 7, so that the waterproof material is not damaged, and an additional waterproof layer is added within the basement roof 5 waterproof layer, and the brick wall 11 can also attach to the waterproof structure covering the plastered transition 6 and the top of the connected basement roof 5, ensuring the waterproof effect of the basement bottom corner; The closing of the side waterproof structure of the cantilevered plate reverse ridge 13 adopts the combination of closing groove, pressing strip 14, tight nail part and sealing paste 22, ensuring the firmness and waterproof sealing of the closing, avoiding the cracking of the waterproof closing, and reducing the occurrence of corner leakage hidden trouble; The concrete filler 18 can fill the cavity between the lower side of the cantilevered plate 12 and the backfill soil 15, which not only solves the problem of exposed waterproof structure caused by the settlement of the lower backfill of the cantilevered plate 12, but also cooperates with the brick wall 11 to completely attach to the waterproof structure covering the bottom of the cantilevered plate 12; The splash water 17 cooperates with the concrete filler 18 to completely attach to the waterproof structure covering the lower part and the lower end corner of the cantilevered plate reverse ridge 13; The concrete waterproof protection layer 4, the brick wall 11, the concrete filler 18 and the splash water 17 are sequentially arranged, which completely and continuously attaches to the waterproof structure covering the top of the basement roof 5, the plastered transition 6, the side of the podium exterior wall 8, the bottom of the cantilevered plate 12, the lower part of the side of the cantilevered plate reverse ridge 13, forming a continuous protection structure and improving the protection performance of the waterproof structure.

[0048] The embodiments described above are only part of the embodiments of the present application, rather than all the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

Claims

1. A corner waterproof structure, characterized by: The shadow corner between the basement roof and the podium outer wall is provided with a plaster transition and a shadow corner waterproof additional layer, the basement roof top surface is sequentially provided with a basement roof waterproof layer and a concrete waterproof protection layer, the podium outer wall side surface is provided with a podium outer wall waterproof layer, the basement roof waterproof layer extends to the podium outer wall side surface through the shadow corner waterproof additional layer, the lower end of the podium outer wall waterproof layer is lapped on the basement roof waterproof layer, the upper end of the podium outer wall waterproof layer extends to the closing groove on the upper part of the overhanging plate reverse ridge side surface through the overhanging plate bottom surface and is fixed by the pressing strip cooperating with the fastening piece and sealed by the sealing paste; The basement roof waterproof layer adopts a non-solidified asphalt waterproof coating layer and an SBS asphalt pre-paved reverse-sticking waterproof roll material which are sequentially laid, the podium outer wall waterproof layer adopts a water-based anti-slippage waterproof coating layer and an SBS asphalt self-adhesive waterproof roll material which are sequentially laid, and the non-solidified asphalt waterproof coating layer and the SBS asphalt pre-paved reverse-sticking waterproof roll material both extend to the podium outer wall side surface through the shadow corner waterproof additional layer, and the lower end of the water-based anti-slippage waterproof coating layer and the SBS asphalt self-adhesive waterproof roll material is respectively lapped on the non-solidified asphalt waterproof coating layer and the SBS asphalt pre-paved reverse-sticking waterproof roll material; The shadow corner waterproof additional layer adopts a non-solidified asphalt waterproof coating layer and an SBS asphalt pre-paved reverse-sticking waterproof roll material which are sequentially laid.

2. The grommet of claim 1, wherein: The plaster transition adopts fine stone concrete.

3. The grommet of claim 1, wherein: The concrete waterproof protection layer is internally provided with a steel mesh, and the concrete waterproof protection layer is provided with cutting joints at intervals.

4. The grommet of claim 1, wherein: The pressing strip is made of aluminum alloy material and is distributed at intervals.

5. The grommet of claim 1, wherein: The water spout is supported on the water spout foundation.

6. A method of constructing a grommet waterstop structure as claimed in any one of claims 1 to 5, characterised by: First, the basement roof, the first floor of the podium outer wall, cantilever plate and cantilever plate reverse ridge are poured, and a closing groove is reserved on the upper side of the cantilever plate reverse ridge, and then the base and the closing groove are cleaned; then, a plaster transition is arranged between the basement roof and the podium outer wall; then, a waterproof additional layer of the shadow corner is constructed, which covers the plaster transition area and the connected basement roof and podium outer wall; then, a waterproof layer of the basement roof is constructed, which extends to the side of the podium outer wall through the waterproof additional layer of the shadow corner; then, a closed water test is conducted on the basement; then, a concrete waterproof protective layer is laid on the top surface of the basement roof; then, a waterproof layer of the podium outer wall is constructed, so that the lower end of the waterproof layer of the podium outer wall is lapped on the waterproof layer of the basement roof; then, the upper end of the waterproof layer of the podium outer wall extends to the closing groove in the upper side of the cantilever plate reverse ridge through the bottom surface of the cantilever plate, and is first fixed by the pressing strip and the fastening part, and then sealed by the sealing paste; then, a brick wall is built between the basement roof and the cantilever plate, so that the back of the brick wall covers and protects the waterproof structure of the side of the podium outer wall, the top surface covers and protects the waterproof structure of the part of the bottom surface of the cantilever plate close to the podium outer wall, and the bottom surface covers and protects the waterproof structure of the top surface of the basement roof and the connected plaster transition; then, the backfill soil is spread and compacted in layers on the basement roof until it reaches below the bottom surface of the cantilever plate, and then the concrete filler is poured, and then the backfill is continued to the design elevation, and then the scattered water foundation is constructed by reverse grooving, and then the scattered water is constructed, so that the scattered water and the concrete filler combine to cover the sun corner of the lower end of the cantilever plate reverse ridge, the concrete filler covers and protects the waterproof structure of the remaining part of the bottom surface of the cantilever plate, and the scattered water covers and protects the waterproof structure of the lower part of the side of the cantilever plate reverse ridge.

7. The method of installing a grommet according to claim 6, wherein: Before the main body structure is constructed, when the cantilever plate reverse ridge formwork is erected, the two side formworks are connected by back lath through opposite pull bolts, and a forming strip for forming the closing groove is fixed on the inner surface of one side formwork.

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