High-rise building roof waterproofing structure

Abstract

The application relates to the field of building construction design, and provides a high-rise building roof anti-seepage structure, which comprises a plurality of prefabricated plate pieces and an internal anti-seepage unit arranged between two adjacent prefabricated plate pieces, and a self-leveling mortar layer is jointly cast on the top of the prefabricated plate pieces and the internal anti-seepage unit; the internal anti-seepage unit comprises a base plate piece and two side plate pieces, the two side plate pieces are symmetrically arranged and respectively fixed to two opposite sides of the base plate piece, and the base plate piece and the two side plate pieces jointly enclose a drainage cavity; each side plate piece is used for being fixed to a concrete base plate of a building roof; a built-in abutting plate is arranged on the side surface of the base plate piece, the abutting plate is inserted between two adjacent side plate pieces and abuts against the adjacent side surfaces of the two side plate pieces at the same time; a waterproof sheet is attached to the side surface of the prefabricated plate piece, and a plastering layer for bonding and fixing the waterproof sheet is arranged on the outer side surface of the side plate piece. Based on the above, the possibility of rainwater seepage into a building room can be reduced, and the building roof can keep a good anti-seepage effect.

Description

Technical Field

[0001] This application relates to the field of architectural construction design, and in particular to a waterproof structure for the roof of a high-rise building. Background Technology

[0002] High-rise buildings, as the name suggests, refer to buildings with a large number of floors and a relatively high height. The construction and decoration process of modern high-rise buildings usually uses prefabricated panels, which have the advantages of simple structure, light weight, easy installation and low cost, which can effectively shorten the construction cycle and overall cost of the building.

[0003] Currently, the construction of existing high-rise building roofs involves laying prefabricated panels onto the roof surface, followed by a layer of perlite wool as the roof insulation layer. Finally, an asphalt waterproofing sheet is laid on top of the insulation layer, or other waterproofing agents such as plastic sealant or modified asphalt are used to achieve the roof's waterproofing and seepage prevention function. However, due to assembly precision errors during construction, gaps inevitably exist between adjacent prefabricated panels. Subsequent prefabricated panels are affected by thermal expansion and contraction, causing these gaps to widen and making leakage a common problem, which needs improvement. Summary of the Invention

[0004] In order to maintain a good anti-leakage effect on the roof of a building, this application provides an anti-leakage structure for the roof of a high-rise building.

[0005] The technical solution for a high-rise building roof waterproofing structure provided in this application is as follows:

[0006] A waterproofing structure for the roof of a high-rise building includes multiple precast panels arranged side by side and an inner waterproofing unit disposed between two adjacent precast panels. The tops of the precast panels and the inner waterproofing unit are both coated with a self-leveling mortar layer. Both ends of the inner waterproofing unit are open along its extension direction.

[0007] The internal seepage prevention unit includes a base plate and two side plates. The two side plates are symmetrically arranged and fixed to the two opposite sides of the base plate. The base plate and the two side plates together enclose and form a drainage cavity.

[0008] Each side panel is used to fix to the concrete base plate of the building roof; the side of the base panel is provided with an integrally formed abutment plate, which is inserted between two adjacent side panels and simultaneously abuts against the adjacent sides of the two side panels.

[0009] Waterproof sheets are adhered to the sides of the precast panels, and the surface of the waterproof sheets has a granular layer; the outer side of the side panels has a mortar layer for bonding and fixing the waterproof sheets.

[0010] By adopting the above technical solution, when laying the building roof of this application, the base plate can be fixed between two side plates to form an internal waterproof unit. Each internal waterproof unit is pre-fixed to the concrete substrate according to the design plan. Then, waterproof sheets are bonded to the sides of the precast plates. Cement mortar is applied to the side plates of the internal waterproof unit to form a plaster layer. The granular layer on the surface of the waterproof sheet is bonded to the plaster layer on the surface of the side plates, which can make the precast plates and adjacent side plates firmly connected. After all the precast plates are laid, mortar is poured on the surface of the components to form a self-leveling mortar layer, which completes the construction of the entire building roof. At this time, the self-leveling mortar layer can play a preliminary waterproof role and reduce the possibility of rainwater seepage when it rains.

[0011] Moreover, as time goes by, the precast panels deform due to thermal expansion and contraction. When the connection between the precast panels and the inner waterproofing unit shifts, causing cracks in the self-leveling mortar layer above, the precast panels can cause the connected side panels to shift, creating a gap between the abutment panel and the side panels. At this time, the cracks often form above the gaps. Rainwater can seep downwards through the cracks and into the drainage cavity of the inner waterproofing unit. It can then flow along the extension direction of the inner waterproofing unit and finally be discharged through the open end. This can greatly reduce the possibility of rainwater seeping into the building interior, thus maintaining a good waterproofing effect on the building roof.

[0012] Optionally, the side plate includes a connecting part, a supporting part, a transition part, and a fixing part arranged sequentially, wherein,

[0013] The connecting part is vertically arranged, and the plaster layer is applied to the outer side of the connecting part; the connecting part and the supporting part are vertically arranged, and when the precast panel is fixed to the connecting part, the precast panel abuts against the top surface of the supporting part;

[0014] The fixing part is fixed to the concrete substrate by bolt components; a layer of fine sand is provided between the precast slab and the concrete substrate, and the transition part abuts against the outside of the fine sand layer; the foundation slab is fixed to the inner side of the transition part.

[0015] By adopting the above technical solution, the fixing part is used for pre-fixing with the concrete substrate, while the connecting part is used for bonding and fixing the precast panels; by setting the supporting part to support the precast panels, the precast panels can be kept at a distance from the concrete substrate. During the construction of the building roof, sand is filled in the area between adjacent internal waterproofing units to form a fine sand layer, so that the top surface of the fine sand layer is flush with the supporting part, and then the precast panels are laid and installed; if there are local cracks in the precast panels of the completed building roof, rainwater seeps downward along the cracks and can be absorbed by the fine sand layer, thereby reducing the leakage of rainwater into the building interior, and further maintaining a good waterproofing effect for the building roof.

[0016] Optionally, the base plate has two sets of support plates on its sides, symmetrically arranged on both sides of the abutment plate; wherein,

[0017] The support plate assembly includes a first support plate and a second support plate fixed to the base plate. The second support plate is located on the side of the first support plate away from the abutment plate. The end face of the first support plate abuts against the support portion, and the end face of the second support plate abuts against the transition portion.

[0018] By adopting the above technical solution, and by setting up a support plate assembly, the first support plate and the second support plate of the support plate assembly jointly support the side plate, which can enhance the support strength of the precast plate when it is placed on the support part, so that the entire building roof has good load-bearing capacity, thereby reducing the possibility of side plate deformation when people step on the roof.

[0019] Optionally, a first drainage area is formed between the first support plate and the support part. The side of the support part facing the precast plate is provided with an inner groove, and the bottom wall of the inner groove is provided with a guide hole that communicates with the first drainage area. In addition, a one-way valve for limiting the backflow of rainwater in the drainage cavity is movably installed inside the guide hole.

[0020] By adopting the above technical solution, when rainwater seeps downwards into the gap between the waterproof sheet and the adjacent side panels during rainy weather, the rainwater can enter the set recessed groove and flow into the drainage cavity through the guide hole, thereby improving the situation of rainwater leakage into the building interior. Moreover, the set one-way core valve can block the guide hole when the rainwater level in the first drainage area rises, reducing the possibility of rainwater flowing back into the guide hole, so that the building roof maintains a good anti-leakage effect.

[0021] Optionally, the one-way valve is made of an elastic material and includes a core column, an umbrella cap at one end of the core column, and a core strip at the other end of the core column; wherein,

[0022] The core column is movably inserted into the guide hole, the umbrella cap is located in the first drainage area, and the core bar is located in the recessed groove;

[0023] Multiple core bars are provided, and all core bars are evenly distributed around the outer circumference of the core column. When the core bar abuts against the bottom wall of the recessed groove, a gap is formed between the umbrella cap and the inner side of the support.

[0024] By adopting the above technical solution, and by setting a core column that is movably installed in the guide hole, the one-way core valve can move within the guide hole. Under normal conditions, each core bar at the end of the core column can automatically abut against the bottom wall of the recessed groove, and the spaced core bars will not affect the normal flow of rainwater into the guide hole. When the rainwater level rises, the one-way core valve moves upward under the buoyancy of the rainwater, and the umbrella cap at the end of the core column can block the guide hole, thereby preventing rainwater backflow.

[0025] Optionally, a grid plate is provided between the precast slab and the fine sand layer. The grid plate has multiple strip grooves spaced apart on the side near the precast slab. Each strip groove runs through two opposite sides of the grid plate, and the extension direction of the strip groove is set towards the connection part.

[0026] By adopting the above technical solution, when the precast panels deform under the phenomenon of thermal expansion and contraction, resulting in local cracks, rainwater seeps downward through the cracks and enters the strip groove of the lattice panel. It can then flow along the extension direction of the strip groove and finally into the recessed groove on the surface of the support part, which helps to further enhance the waterproof effect of the building roof.

[0027] Optionally, a second drainage area is formed between the first support plate and the adjacent second support plate, and a plurality of permeable holes are provided through the transition section, each of which is connected to the second drainage area; geotextile for covering the permeable holes is bonded to the outer side of the transition section.

[0028] By adopting the above technical solution, if there are local cracks in the precast panels, rainwater will seep downwards and accumulate in the fine sand layer. When the weather clears up and the building roof absorbs heat from the sun, the water vapor formed inside the fine sand layer due to the heat can enter the second drainage area through the set infiltration holes and be discharged from the open end of the inner seepage prevention unit. This helps to keep the inside of the fine sand layer dry and plays a good role in water absorption and seepage prevention. In addition, the setting of geotextile can reduce the possibility of fine sand entering the second drainage area.

[0029] Optionally, the base plate, abutment plate, and support plate assembly can all be made of aluminum alloy.

[0030] By adopting the above technical solution, aluminum alloy material has good thermal conductivity. When the weather is sunny, sunlight shines on the top of the abutment plate, which can absorb heat and conduct the heat quickly along the abutment plate to the base plate, so that the air temperature in the drainage cavity can rise rapidly. The hot air inside the drainage cavity bakes the sand in the fine sand layer through the permeation holes, which can quickly dry the sand in the fine sand layer. Thus, the fine sand layer can maintain good water absorption and leakage prevention effect under changing weather conditions.

[0031] Optionally, a third drainage area is formed between the second support plate and the transition section, and an absorbent cotton felt is provided inside the third drainage area.

[0032] By adopting the above technical solution, the water-absorbing cotton felt can enhance the waterproof sealing performance at the connection between the base plate and the adjacent side plate, reducing the possibility of rainwater seeping into the building interior through the gap between the base plate and the adjacent side plate and the concrete substrate.

[0033] Optionally, a fiberglass felt mesh is laid on the top of the inner waterproof unit and on the top of the two adjacent waterproof sheets on both sides, and a self-leveling mortar layer covers the fiberglass felt mesh.

[0034] By adopting the above technical solution, after laying fiberglass felt on top of two adjacent waterproof sheets and pouring mortar to form a self-leveling mortar layer, the fiberglass felt has the function of enhancing the connection strength between the two waterproof sheets, thereby enhancing the structural strength of the self-leveling mortar layer and reducing the possibility of cracks in the self-leveling mortar layer when the precast panel deforms.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. By connecting precast panels and side panels, the precast panels deform under thermal expansion and contraction, which can cause the connected side panels to shift, creating a gap between them. Cracks often form above the gaps, and rainwater can seep downwards through the cracks into the drainage cavity of the inner waterproofing unit and eventually be discharged from the open end, which can reduce the possibility of rainwater leakage into the building interior and maintain a good waterproofing effect on the building roof.

[0037] 2. By setting a fine sand layer, when the precast panels crack locally, rainwater seeps downwards along the cracks and can be absorbed by the fine sand layer, thereby reducing the leakage of rainwater into the building and further maintaining a good waterproof effect on the building roof.

[0038] 3. By setting recessed grooves and diversion holes, rainwater can enter the gap between the waterproof sheet and the adjacent side panel, then enter the recessed grooves and flow into the drainage cavity through the diversion holes, thereby improving the situation of rainwater leakage into the building interior and maintaining a good anti-leakage effect. Attached Figure Description

[0039] Figure 1 This is a longitudinal sectional view of the building roof in this embodiment, mainly showing the structure of the anti-leakage structure;

[0040] Figure 2 This is a schematic diagram of the structure when the inner seepage prevention unit is pre-fixed to the concrete substrate in this embodiment;

[0041] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0042] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0043] Figure 5 This is a schematic diagram of the lattice plate in this embodiment;

[0044] Figure 6This is a schematic diagram of the one-way valve in this embodiment;

[0045] Figure 7 yes Figure 1 A magnified view of point C in the middle.

[0046] Explanation of reference numerals in the attached drawings: 1. Precast panel; 11. Waterproof sheet; 2. Internal seepage prevention unit; 21. Drainage cavity; 22. First drainage area; 23. Second drainage area; 24. Third drainage area; 3. Foundation panel; 31. Abutment plate; 32. First support plate; 33. Second support plate; 34. Absorbent felt;

[0047] 4. Side panel; 41. Connecting part; 411. Plaster layer; 42. Support part; 421. Recessed groove; 422. Drainage hole; 43. Transition part; 431. Permeation hole; 432. Geotextile; 44. Fixing part; 441. Bolt assembly; 5. Self-leveling mortar layer; 51. Fiberglass felt net; 6. Fine sand layer; 7. One-way core valve; 71. Core column; 72. Umbrella cap; 73. Core strip; 8. Lattice panel; 81. Strip groove; 9. Concrete substrate. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0049] This application discloses a waterproof structure for the roof of a high-rise building.

[0050] Reference Figure 1 A waterproofing structure for the roof of a high-rise building includes multiple precast panels 1 arranged side by side and an inner waterproofing unit 2 disposed between two adjacent precast panels 1, wherein both ends of the inner waterproofing unit 2 in the extension direction are open.

[0051] The internal seepage prevention unit 2 includes a base plate 3 and two side plates 4, both of which are individually machined. In this embodiment, the side plates 4 are made of steel, which has excellent hardness, while the base plate 3 is made of aluminum alloy, which has excellent thermal conductivity. When laying the internal seepage prevention unit 2, the two side plates 4 need to be fixed to both sides of the base plate 3 in the width direction, so that the two side plates 4 are symmetrically arranged along the center face of the base plate 3, thereby forming a complete internal seepage prevention unit 2. Then, according to the design plan, the side plates 4 are fixed to the concrete substrate 9 of the building roof, thus pre-fixing the internal seepage prevention unit 2 to the concrete substrate 9.

[0052] The side panel 4 includes a connecting part 41, a supporting part 42, a transition part 43, and a fixing part 44, which are sequentially arranged and integrally formed. The fixing part 44 is fixed to the concrete substrate 9 by bolt components 441. In the specific construction process, bolt components 441 with good fixing ability, such as expansion bolts or anchor bolts, can be selected for the installation and fixing of the side panel 4. (See also...) Figure 2 After the side plate 4 is fixed to the concrete substrate 9, the transition part 43 is inclined inward as a whole; the support part 42 and the connecting part 41 are vertically arranged. After the side plate 4 is fixed to the concrete substrate 9, the support part 42 can remain horizontal and is used to support and position the precast plate 1; while the connecting part 41 can remain vertical and is used to bond and fix it to the precast plate 1.

[0053] Reference Figure 2 The base plate 3 is fixed to the two transition portions 43 of the two adjacent side plates 4 by connecting bolts. The side of the base plate 3 is provided with an integrally formed abutment plate 31, the width of which is equal to the minimum distance between the two connecting portions 41. When the base plate 3 is connected to the side plates 4, the abutment plate 31 can be inserted between the two adjacent side plates 4 and simultaneously abut against the adjacent sides of the two side plates 4. Furthermore, the top surface of the abutment plate 31 is flush with the side of the connecting portion 41 away from the support portion 42. The base plate 3 and the two side plates 4 together form a drainage cavity 21.

[0054] The base plate 3 also has two sets of support plates on its side. The support plates and the abutment plate 31 are located on the same side of the base plate 3, and the two sets of support plates are symmetrically arranged on both sides of the abutment plate 31. Specifically, the support plates include a first support plate 32 and a second support plate 33. Both the first support plate 32 and the second support plate 33 are integrally formed with the base plate 3, and the second support plate 33 is located on the side of the first support plate 32 away from the abutment plate 31.

[0055] After the base plate 3 is fixed to the two side plates 4, the first support plate 32 can abut against the inner side of the support portion 42, and the second support plate 33 can abut against the inner side of the transition portion 43. At this time, the first support plate 32 and the support portion 42 divide the drainage cavity 21 into a first drainage area 22, the first support plate 32 and the adjacent second support plate 33 divide the drainage cavity 21 into a second drainage area 23, and the second support plate 33 and the transition portion 43 divide the drainage cavity 21 into a third drainage area 24. The third drainage area 24 is filled with absorbent cotton felt 34 to enhance the waterproof sealing performance at the connection between the base plate 3 and the adjacent side plates 4, and reduce the possibility of rainwater seeping into the building interior through the gap between the base plate 3 and the adjacent side plates 4 and the concrete substrate 9.

[0056] Reference Figure 3A waterproof sheet 11 is pasted on the side of the precast slab 1, and a granular layer is provided on the surface of the waterproof sheet 1 away from the precast slab 1. The outer side of the connecting part 41 is coated with cement mortar to form a plaster layer 411. By bonding and fixing the waterproof sheet 11 and the plaster layer 411 on the side of the connecting part 41 to each other, the precast slab 1 and the inner seepage prevention unit 2 can be stably connected.

[0057] Additionally, returning Figure 1 A lattice plate 8 is sandwiched between the precast panel 1 and the horizontally arranged support part 42. By abutting the lattice plate 8 against the top surface of the support part 42 and then bonding and fixing the precast panel 1 to the connection part 41, the positioning and installation of the precast panel 1 can be achieved.

[0058] After the precast panels 1 and lattice panels 8 are installed, a gap can be maintained between the lattice panels 8 and the concrete substrate 9. Before the precast panels 1 are laid, sand is filled into the area between adjacent inner waterproof units 2, and the sand is made flush with the top surface of the support part 42. Then, the lattice panels 8 are laid on top of the sand and the support part 42, and finally the precast panels 1 are laid. A fine sand layer 6 can be formed between the lattice panels 8 and the concrete substrate 9. The fine sand layer 6 can first help support the lattice panels 8 and the precast panels 1, and at the same time, it can absorb rainwater that seeps downward, which can reduce the leakage of rainwater into the building interior and maintain a good waterproof effect on the building roof.

[0059] Reference Figure 4 The support part 42 has an inner groove 421 on the side facing the precast panel 1. The bottom wall of the inner groove 421 has a through guide hole 422, which is connected to the first drainage area 22 inside. When rainwater seeps downward and enters the gap between the waterproof sheet 11 and the adjacent side panel 4, it can fall into the inner groove 421 and enter the drainage cavity 21 through the guide hole 422, so that the rainwater can be discharged from the open end of the inner waterproof unit 2 along the extension direction of the inner waterproof unit 2, thereby improving the situation of rainwater seepage into the building interior.

[0060] Furthermore, referring to Figure 5 The lattice panel 8 has multiple strip grooves 81 on its side near the precast panel 1. All strip grooves 81 are equidistantly arranged on the surface of the lattice panel 8. Each strip groove 81 runs through two opposite sides of the lattice panel 8, and the groove depth in the middle of the strip groove 81 is greater than the groove depth on both sides of the strip groove 81. The extension direction of the strip groove 81 is set towards the connecting part 41 and is located above the recessed groove 421. When the precast panel 1 has local cracks due to deformation, rainwater seeps through the cracks into the strip groove 81 and can flow along the extension direction of the strip groove 81 and finally into the recessed groove 421 on the surface of the supporting part 42, which can also improve the situation of rainwater leakage into the building interior.

[0061] Additionally, returning Figure 4 The guide hole 422 is also equipped with a movable one-way valve 7 to limit the backflow of rainwater in the drainage cavity 21. (See also...) Figure 6 The one-way valve 7 is made of elastic materials such as rubber or silicone, and includes a core column 71, an umbrella cap 72 integrally formed at one end of the core column 71, and a core strip 73 integrally formed at the other end of the core column 71. The outer diameter of the core column 71 is smaller than the inner diameter of the guide hole 422, and the axial length of the core column 71 is greater than the depth of the guide hole 422, so that the core column 71 can move freely within the guide hole 422.

[0062] The umbrella cap 72 is located within the first drainage area 22, while the core strip 73 is located inside the recessed groove 421. Multiple core strips 73 are provided, all evenly distributed around the outer circumference of the core column 71. Under its own weight, the one-way valve 7 allows each core strip 73 to naturally abut against the bottom wall of the recessed groove 421. At this time, a gap is formed between the umbrella cap 72 and the inner side of the support part 42, allowing rainwater to smoothly enter the first drainage area 22. When the rainwater level in the first drainage area 22 rises and overflows the umbrella cap 72, the umbrella cap 72 moves upward under buoyancy, ultimately sealing the guide hole 422, thus preventing rainwater backflow.

[0063] Reference Figure 7 The transition section 43 is located outside the fine sand layer 6. The transition section 43 is provided with a plurality of through permeable holes 431, each of which is connected to the second drainage area 23. Furthermore, the outer surface of the transition section 43 is bonded with geotextile 432 for covering the permeable holes 431, in order to prevent sand from entering the second drainage area 23.

[0064] When rainwater seeps downwards into the fine sand layer 6 and is stored inside it, after the weather clears up and the building roof absorbs heat from the sunlight, the heat is quickly conducted along the abutment plate 31 and the foundation plate 3 to the drainage cavity 21, and can bake the fine sand layer 6 through the infiltration holes 431. The rainwater inside the fine sand layer 6 evaporates due to the heat, forming water vapor, which enters the second drainage area 23 through the infiltration holes 431 and is discharged from the open end of the inner seepage prevention unit 2 in the extension direction, which is conducive to the rapid drying of the fine sand layer 6.

[0065] Back Figure 3The top of the inner waterproofing unit 2 and the tops of the two adjacent waterproof sheets 11 on both sides are covered with fiberglass felt mesh 51. Cement mortar is poured onto the top of each precast panel 1 and the top of each group of inner waterproofing units 2. After the cement mortar naturally levels, a self-leveling mortar layer 5 is formed, which covers the fiberglass felt mesh 51. The fiberglass felt mesh 51 is used to enhance the connection strength between the two waterproof sheets 11, while the self-leveling mortar layer 5 provides initial waterproofing, reducing the possibility of rainwater seepage during rainfall.

[0066] The implementation principle of a high-rise building roof waterproofing structure according to an embodiment of this application is as follows:

[0067] By bonding and fixing the precast panel 1 and the side panel 4 together, and by pouring the self-leveling mortar layer 5 to maintain the integrity of the building roof, a preliminary anti-seepage effect can be achieved. When the connection position between the precast panel 1 and the adjacent side panel 4 is offset, causing cracks in the self-leveling mortar layer 5 above, a gap is formed between the abutment plate 31 and the side panel 4. At this time, the crack often occurs above the gap. After rainwater seeps downward through the crack, it can seep into the drainage cavity 21 of the inner anti-seepage unit 2, and then along the extension direction of the inner anti-seepage unit 2, and finally be discharged through the open end, which can greatly reduce the possibility of rainwater seeping into the building interior. Furthermore, the design of the fine sand layer 6, the lattice plate 8 and the diversion hole 422 can help enhance the anti-seepage effect of the building roof, thereby maintaining a good anti-seepage effect for the building roof.

[0068] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof structure for the roof of a high-rise building, characterized in that: It includes multiple precast slabs (1) arranged side by side and an internal seepage prevention unit (2) set between two adjacent precast slabs (1). The top of the precast slabs (1) and the top of the internal seepage prevention unit (2) are jointly filled with a self-leveling mortar layer (5); both ends of the internal seepage prevention unit (2) in the extension direction are open, wherein, The internal seepage prevention unit (2) includes a base plate (3) and two side plates (4). The two side plates (4) are symmetrically arranged and fixed to the two opposite sides of the base plate (3). The base plate (3) and the two side plates (4) together enclose a drainage cavity (21). Each of the side panels (4) is used to fix to the concrete base plate (9) of the building roof; the side of the base plate (3) is provided with an integrally formed abutment plate (31), the abutment plate (31) is inserted between two adjacent side panels (4) and simultaneously abuts against the adjacent sides of the two side panels (4). The side of the precast panel (1) is covered with a waterproof sheet (11), and the surface of the waterproof sheet (11) is provided with a granular layer; the outer side of the side panel (4) is provided with a grout layer (411) for bonding and fixing the waterproof sheet (11).

2. The waterproofing structure for high-rise building roofs according to claim 1, characterized in that: The side plate (4) includes a connecting part (41), a supporting part (42), a transition part (43), and a fixing part (44) arranged sequentially, wherein, The connecting part (41) is vertically arranged, and the plaster layer (411) is provided on the outer side of the connecting part (41); the connecting part (41) and the supporting part (42) are vertically arranged, and when the precast plate (1) is fixed to the connecting part (41), the precast plate (1) abuts against the top surface of the supporting part (42); The fixing part (44) is fixed to the concrete substrate (9) by bolt component (441); a fine sand layer (6) is provided between the precast plate (1) and the concrete substrate (9), and the transition part (43) abuts against the outside of the fine sand layer (6); the base plate (3) is fixed to the inner side of the transition part (43).

3. The waterproofing structure for high-rise building roofs according to claim 2, characterized in that: The base plate (3) has two sets of support plates on its side, and the two sets of support plates are symmetrically arranged on both sides of the abutment plate (31); wherein, The support plate assembly includes a first support plate (32) and a second support plate (33) fixed to the base plate (3). The second support plate (33) is located on the side of the first support plate (32) away from the abutment plate (31). The end face of the first support plate (32) abuts against the support portion (42), and the end face of the second support plate (33) abuts against the transition portion (43).

4. The waterproofing structure for high-rise building roofs according to claim 3, characterized in that: A first drainage area (22) is formed between the first support plate (32) and the support part (42). The support part (42) has an indentation groove (421) on the side facing the precast plate (1). The bottom wall of the indentation groove (421) has a guide hole (422) that communicates with the first drainage area (22). In addition, a one-way valve (7) for limiting the backflow of rainwater in the drainage cavity (21) is movably installed inside the guide hole (422).

5. The waterproofing structure for high-rise building roofs according to claim 4, characterized in that: The one-way valve (7) is made of an elastic material and includes a core column (71), an umbrella cap (72) at one end of the core column (71), and a core strip (73) at the other end of the core column (71); wherein, The core column (71) is movably inserted into the guide hole (422), the umbrella cap (72) is located in the first drainage area (22), and the core strip (73) is located in the recessed groove (421); The core strip (73) is provided with multiple strips, and all core strips (73) are evenly distributed around the outer circumference of the core column (71). When the core strip (73) abuts against the bottom wall of the recessed groove (421), the umbrella cap (72) forms a gap with the inner side of the support part (42).

6. The waterproofing structure for high-rise building roofs according to claim 4, characterized in that: A grid plate (8) is provided between the precast slab (1) and the fine sand layer (6). The grid plate (8) has multiple strip grooves (81) spaced apart on the side of the precast slab (1). Each strip groove (81) is connected to two opposite sides of the grid plate (8), and the extension direction of the strip groove (81) is set towards the connecting part (41).

7. The waterproofing structure for high-rise building roofs according to claim 3, characterized in that: A second drainage area (23) is formed between the first support plate (32) and the adjacent second support plate (33). The transition part (43) is provided with a plurality of infiltration holes (431), and each of the infiltration holes (431) is connected to the second drainage area (23). Geotextile (432) for covering the infiltration holes (431) is bonded to the outer side of the transition part (43).

8. The waterproofing structure for high-rise building roofs according to claim 7, characterized in that: The base plate (3), the abutment plate (31), and the support plate assembly are all made of aluminum alloy.

9. The waterproofing structure for high-rise building roofs according to claim 3, characterized in that: A third drainage area (24) is formed between the second support plate (33) and the transition part (43), and an absorbent cotton felt (34) is provided inside the third drainage area (24).

10. The waterproofing structure for high-rise building roofs according to claim 1, characterized in that: The top of the inner seepage prevention unit (2) and the top of the two adjacent waterproof sheets (11) on both sides are covered with fiberglass felt mesh (51), and the self-leveling mortar layer (5) covers the fiberglass felt mesh (51).

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