Building roof waterproof structure and construction method

Abstract

The invention provides a building roof waterproof structure and a construction method, the building roof waterproof structure comprises waterproof coiled materials and a first pressing sealing assembly, and the waterproof coiled materials are laid on the inner side, the top side and the outer side of a parapet wall; the first pressing sealing assembly comprises first sealing channel steel and first pressing channel steel, a sealing groove is formed in the outer side of the protective wall, the first sealing channel steel is arranged in the sealing groove, and the closing edge of the waterproof roll bypasses the first sealing channel steel and is located between the first sealing channel steel and the inner wall of the sealing groove; the first sealing channel steel compresses the closing edge of the waterproof roll; the first pressing steel channel is located in the first sealing steel channel, and the first pressing steel channel presses the waterproof roll located in the first sealing steel channel. The first pressing and sealing assembly further comprises a first fastener, and the first fastener penetrates through the first pressing steel channel and the first sealing steel channel and penetrates into the parapet wall. The waterproof performance between the waterproof roll closing edge and the protective wall can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of roof waterproofing, and in particular to a waterproof structure for building roofs and a construction method thereof. Background Art

[0002] There are many old houses in many old urban areas, such as residential buildings and office buildings. Due to their long construction years, these old houses usually have many common problems, such as water leakage problems. During the rainy season, the water leakage in the houses seriously affects the lives of residents. Therefore, it is necessary to renovate these old houses to improve their waterproof performance.

[0003] In the related art, waterproof coiled materials are generally pasted on the roof. Waterproof coiled materials are widely used in various building structures. Generally, a waterproof layer is formed by laying the waterproof coiled materials to help the building effectively resist the entry of external moisture or the leakage of internal moisture, thereby meeting the use requirements and extending the service life of the building.

[0004] There are usually parapets around the roof of a building. The parapet is a low wall around the roof, which can provide a structural basis for roof waterproofing and exterior wall decoration. When constructing the roof waterproof layer, in order to improve the waterproof performance between the parapet and the roof floor slab, the waterproof coiled material is laid to the position of the parapet and needs to be closed. The conventional method is to extend the waterproof coiled material upwards to a certain height of the parapet, and then apply a sealant to the closing edge of the waterproof coiled material for sealing.

[0005] However, in the related art, there is a lack of other effective sealing structures at the closing edge of the waterproof coiled material except for applying the sealant. The sealant at the closing edge of the waterproof coiled material is exposed to the air for a long time, which easily causes the sealant to age and crack, thereby reducing the sealing performance, resulting in a gap between the closing edge of the waterproof coiled material and the parapet, and the moisture on the parapet wall will seep into the roof floor slab through the gap, causing roof leakage and reducing the durability and reliability of the roof waterproof structure. Summary of the Invention

[0006] In order to improve the waterproof performance between the closing edge of the waterproof coiled material and the parapet, the present application provides a waterproof structure for building roofs and a construction method thereof.

[0007] In a first aspect, the present application provides a waterproof structure for building roofs, adopting the following technical solutions: A waterproof structure for a building roof, comprising a waterproof coiled material and a first pressing and sealing assembly. The waterproof coiled material is laid on the inner side, top side and outer side of the parapet wall. The first pressing and sealing assembly includes a first sealing channel steel and a first pressing channel steel. A sealing groove is formed on the outer side of the parapet wall. The first sealing channel steel is arranged in the sealing groove. The closing edge of the waterproof coiled material bypasses the first sealing channel steel and is located between the first sealing channel steel and the inner wall of the sealing groove. The first sealing channel steel presses the closing edge of the waterproof coiled material. The first pressing channel steel is located inside the first sealing channel steel, and the first pressing channel steel presses the waterproof coiled material located inside the first sealing channel steel.

[0008] By adopting the above technical solution, the waterproof coiled material is laid on the inner side, top side and outer side of the parapet wall. The closing edge of the waterproof coiled material bypasses the first sealing channel steel and is located between the first sealing channel steel and the inner wall of the sealing groove. The first sealing channel steel can press the waterproof coiled material into the sealing groove. Then, the first pressing channel steel presses the waterproof coiled material inside the first sealing channel steel, and the first pressing channel steel presses the waterproof coiled material located inside the first sealing channel steel, making the waterproof coiled material more firm, enhancing the sealing effect of the closing edge of the waterproof coiled material, and improving the reliable sealing of the closing edge of the waterproof coiled material in the sealing groove.

[0009] Optionally, the first pressing and sealing assembly further includes a first fastener, and the first fastener passes through the first pressing channel steel and the first sealing channel steel and penetrates into the parapet wall.

[0010] By adopting the above technical solution, the first fastener passes through the first pressing channel steel and the first sealing channel steel and penetrates into the parapet wall, realizing the effective pressing and fixing of the waterproof coiled material, improving the stability and reliability of the waterproof structure, and further enhancing the waterproof effect.

[0011] Optionally, the first pressing and sealing assembly further includes a first sealing block, and the first sealing block is sealed inside the first pressing channel steel.

[0012] By adopting the above technical solution, the first sealing block is sealed inside the first pressing channel steel, effectively reducing the infiltration of moisture from between the closing edge of the waterproof coiled material and the parapet wall, and improving the reliability of the waterproof structure. Even if the sealing block ages and cracks after long-term use, the first sealing channel steel and the first pressing channel steel, as sealing structures, can effectively reduce the infiltration of moisture from the joint between the parapet wall and the waterproof coiled material, improving the overall durability and reliability of the waterproof structure.

[0013] Optionally, the height of the sealing groove is flush with the roof floor slab, or the height of the sealing groove is lower than the height of the roof floor slab.

[0014] By adopting the above technical solution, the height of the sealing groove is flush with the roof floor slab or lower than the height of the roof floor slab, enabling the waterproof coiled material to provide waterproof protection for the parapet wall, reducing the infiltration of water from the parapet wall into the roof floor slab, and further improving the waterproof performance.

[0015] Optionally, the waterproof coiled material includes a first coiled material and a second coiled material. The first coiled material covers the inner side of the parapet wall and extends towards the top side of the parapet wall; the second coiled material covers the outer side of the parapet wall and extends towards the top side of the parapet wall. A sealing groove is provided on the top side of the parapet wall, and a second pressing and sealing assembly is arranged in the sealing groove. The second pressing and sealing assembly includes a second sealing channel steel and a second pressing channel steel; the second sealing channel steel is arranged in the sealing groove, the first coiled material and the second coiled material intersect in the second sealing channel steel, and the first coiled material and the second coiled material are connected at the intersection; the second pressing channel steel presses the intersection of the first coiled material and the second coiled material into the second sealing channel steel.

[0016] By adopting the above technical solution, in actual construction, due to the limited size of the waterproof coiled material, it is difficult to directly lay a single waterproof coiled material from the inner side to the outer side of the parapet wall. Therefore, the first coiled material and the second coiled material are arranged to intersect and connect at the top side of the parapet wall, and the second pressing channel steel presses the intersection of the first coiled material and the second coiled material into the second sealing channel steel, improving the waterproof performance at the top of the parapet wall, reducing the infiltration of moisture from the top of the parapet wall into the roof floor slab, and thus enhancing the reliability and durability of the entire waterproof structure.

[0017] Optionally, the waterproof coiled material further includes a third coiled material, which is respectively connected to the first coiled material and the second coiled material. The middle part of the third coiled material is connected inside the second pressing channel steel, and both sides of the third coiled material extend towards the outer side and the inner side of the parapet wall respectively.

[0018] By adopting the above technical solution, the third coiled material can cover the second pressing channel steel, and both sides of the third coiled material extend towards the outer side and the inner side of the parapet wall respectively, thereby enhancing the sealing performance at the second pressing channel steel, reducing the infiltration of moisture, and improving the overall sealing effect and durability of the waterproof structure.

[0019] Optionally, the second pressing and sealing assembly further includes a second fastener and a second sealing block. The second fastener passes through the second sealing channel steel and the second pressing channel steel and penetrates into the parapet wall, and the second sealing block is sealed inside the second pressing channel steel.

[0020] By adopting the above technical solution, the second fastener fixes the second sealing channel steel and the second pressing channel steel in the sealing groove, making the structure more firm. The second sealing block improves the sealing performance of the waterproof structure at the top side of the parapet wall, and enhances the durability and reliability of the waterproof structure.

[0021] Optionally, a base layer, a thermal insulation layer and a leveling layer are sequentially arranged on the roof floor slab. The waterproof coiled material further includes a flat coiled material, a corner coiled material and a filling coiled material. The flat coiled material is laid on the leveling layer, and the corner coiled material is laid between the leveling layer and the parapet wall; A waterproof groove is formed on the inner side of the parapet wall, and a third pressing and sealing assembly is arranged in the waterproof groove. The third pressing and sealing assembly includes a third sealing channel steel and a third pressing channel steel; the third sealing channel steel presses the corner coiled material in the waterproof groove, and the first coiled material and the flat coiled material meet in the third sealing channel steel; the third pressing channel steel presses the intersection of the first coiled material and the flat coiled material in the third sealing channel steel. The filling coiled material is respectively connected with the first coiled material and the flat coiled material, and the middle part of the filling coiled material is connected in the third pressing channel steel.

[0022] By adopting the above technical solution, it is possible to ensure the stable connection and sealing of the flat coiled material, the corner coiled material, the first coiled material and the filling coiled material in the waterproof groove, improve the waterproof performance of the parapet wall and the leveling layer at the corner, and improve the overall reliability and durability of the waterproof structure.

[0023] Optionally, the third pressing and sealing assembly further includes a third fastener and a third sealing block. The third fastener passes through the third sealing channel steel and the third pressing channel steel and penetrates into the parapet wall, and the third sealing block is sealed in the third pressing channel steel.

[0024] By adopting the above technical solution, the third fastener fixes the third sealing channel steel and the third pressing channel steel in the sealing groove, making the structure more firm. The third sealing block improves the sealing performance of the waterproof structure on the top side of the parapet wall, and improves the durability and reliability of the waterproof structure.

[0025] In a second aspect, the present application further provides a construction method for a waterproof structure of a building roof, using the above-mentioned waterproof structure of the building roof, including the following steps: A sealing groove is formed on the outer side of the parapet wall, and waterproof coiled materials are laid on the inner side, the top side and the outer side of the parapet wall; The closing edge of the waterproof coiled material is bypassed around the first sealing channel steel and located between the first sealing channel steel and the inner wall of the sealing groove, and then the first sealing channel steel presses the closing edge of the waterproof coiled material in the sealing groove; The first pressing channel steel is clamped into the first sealing channel steel, so that a part of the waterproof coiled material is pressed between the first pressing channel steel and the first sealing channel steel; The first fastener passes through the first pressing channel steel and the first sealing channel steel, and the first fastener penetrates into the parapet wall; Sealing glue is filled into the first pressing channel steel, and then the sealing glue solidifies to form a first sealing block, and the first sealing block is flush with the outer side of the parapet wall.

[0026] By adopting the above technical solution, this construction method can ensure that the closing edge of the waterproof coiled material is firmly pressed by the first sealing channel steel and the pressing channel steel in the sealing groove. At the same time, the fixing effect is further enhanced by fasteners. Finally, the sealing block formed after the solidification of the filled sealant can effectively reduce the penetration of moisture from the sealing groove, significantly improving the sealing performance and durability of the roof waterproof structure.

[0027] In summary, the present application includes at least one of the following beneficial effects: 1. The first sealing channel steel presses the closing edge of the waterproof coiled material into the sealing groove, and the pressing channel steel presses the waterproof coiled material into the first sealing channel steel. Then, the pressing channel steel and the first sealing channel steel are fixed in the sealing groove by fasteners, which can effectively fix and seal the closing edge of the waterproof coiled material in the sealing groove, improving the stability and durability of the seal; 2. The second pressing channel steel presses the intersection of the first coiled material and the second coiled material into the second sealing channel steel, and the second sealing block is then sealed in the second pressing channel steel, improving the sealing performance of the top side of the retaining wall and reducing the penetration of moisture from the top of the retaining wall; 3. The waterproof structure design covers the waterproof coiled material from the laying of the leveling layer to the outside of the retaining wall, and the third pressing and sealing assembly, the second pressing and sealing assembly, and the first pressing and sealing assembly are used to press and seal the inner side, top side, and outside of the retaining wall in sequence, significantly improving the overall waterproof performance of the entire waterproof structure and enhancing the overall durability and reliability of the roof waterproof structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a partial sectional structure schematic diagram of the building roof waterproof structure of the embodiment of the present application; Figure 2 is Figure 1 the enlarged structure schematic diagram of part A in Figure 3 is Figure 1 the enlarged structure schematic diagram of part B in Figure 4 is Figure 1 the enlarged structure schematic diagram of part C in

[0029] Description of reference numerals: 1, base layer; 2, insulation layer; 3, leveling layer; 4, waterproof layer; 5, protective layer; 6, waterproof coiled material; 61, first coiled material; 62, second coiled material; 63, third coiled material; 64, flat coiled material; 65, corner coiled material; 66, filling coiled material; 7, first pressing and sealing assembly; 71, first sealing channel steel; 72, first pressing channel steel; 73, first fastener; 74, first sealing block; 8, second pressing and sealing assembly; 81, second sealing channel steel; 82, second pressing channel steel; 83, second fastener; 84, second sealing block; 9, third pressing and sealing assembly; 91, third sealing channel steel; 92, third pressing channel steel; 93, third fastener; 94, third sealing block; 100, roof floor slab; 200, retaining wall; 201, sealing groove; 202, sealing groove; 203, waterproof groove. Detailed implementation manners

[0030] The following further elaborates on this application Figures 1-4 in conjunction with the accompanying drawings.

[0031] This application provides a waterproof structure and construction method for a building roof.

[0032] Step S1: Lay the base layer 1 on the roof floor slab 100.

[0033] Refer to Figure 1 , first clean the roof floor slab 100, remove dust and debris, and repair areas such as cracks and voids to ensure that the roof floor slab 100 is flat, clean, and free of oil stains, providing a good foundation for subsequent construction. Subsequently, spray waterproof coating on the roof floor slab 100, lay a layer of polyester cloth on the waterproof coating, and then apply another layer of waterproof coating on the polyester cloth to form the base layer 1.

[0034] Step S2: Lay the insulation layer 2 on the base layer 1.

[0035] Step S3: Lay the leveling layer 3 on the insulation layer 2. Generally, it is laid with cement mortar, fine aggregate concrete, or asphalt mortar. For the parts of the retaining wall 200, gable wall, expansion joint, and chimney and other structures protruding from the roof, the leveling layer 3 should be made into an arc shape to facilitate the subsequent laying of the waterproof layer 4.

[0036] Step S4: Lay the waterproof layer 4 on the leveling layer 3. The waterproof structure of the building roof further includes a waterproof coiled material 6. The waterproof coiled material 6 includes a flat coiled material 64, and the flat coiled material 64 is laid on the leveling layer 3 so that the flat coiled material 64 serves as the waterproof layer 4.

[0037] Step S5: Make waterproof treatment between the retaining wall 200 and the leveling layer 3.

[0038] Refer to Figure 1 and Figure 2, specifically, the waterproof coiled material 6 further includes a first coiled material 61, a corner coiled material 65, and a filling coiled material 66. First, a waterproof groove 203 is formed inside the retaining wall 200, and then the corner coiled material 65 is laid at the corner between the retaining wall 200 and the leveling layer 3. A third pressing and sealing assembly 9 is arranged in the waterproof groove 203. The third pressing and sealing assembly 9 includes a third sealing channel steel 91, a third pressing channel steel 92, a third fastener 93, and a third sealing block 94. A part of the corner coiled material 65 is recessed into the waterproof groove 203, and the third sealing channel steel 91 presses the corner coiled material 65 into the waterproof groove 203.

[0039] Subsequently, the first coiled material 61 is laid inside the retaining wall 200. The first coiled material 61 and the flat coiled material 64 are connected to the outside of the corner coiled material 65. The first coiled material 61 and the flat coiled material 64 meet inside the third sealing channel steel 91. The third pressing channel steel 92 presses the intersection of the first coiled material 61 and the flat coiled material 64 into the third sealing channel steel 91. The filling coiled material 66 is laid outside the first coiled material 61 and the flat coiled material 64. The filling coiled material 66 is located at the corner between the retaining wall 200 and the leveling layer 3. A part of the filling coiled material 66 is recessed into the third pressing channel steel 92. In this embodiment, the third fastener 93 is specifically an expansion screw. The third fastener 93 passes through the third pressing channel steel 92 and the third sealing channel steel 91 and then penetrates into the retaining wall 200. Then, sealant is filled into the third pressing channel steel 92. After the sealant solidifies, a third sealing block 94 is formed in the third pressing channel steel 92, thereby improving the sealing performance between the flat coiled material 64 and the first coiled material 61 and reducing the occurrence of water seepage between the retaining wall 200 and the leveling layer 3.

[0040] Step S6: Perform waterproof treatment on the top side of the retaining wall 200.

[0041] Reference Figure 1 and Figure 3 , specifically, first, a sealing groove 202 is formed on the top side of the retaining wall 200. The waterproof coiled material 6 further includes a second coiled material 62 and a third coiled material 63. The first coiled material 61 extends towards the top side of the retaining wall 200. The second coiled material 62 is laid on the outside of the retaining wall 200 and extends towards the top side of the retaining wall 200. The first coiled material 61 and the second coiled material 62 meet and are connected in the sealing groove 202 on the top side of the retaining wall 200. It should be noted that in actual construction, due to the limited size of the waterproof coiled material 6, it is difficult to directly lay a waterproof coiled material 6 from the inside of the retaining wall 200 to the outside. Therefore, it is necessary to arrange the first coiled material 61 and the second coiled material 62 to meet and be connected on the top side of the retaining wall 200.

[0042] Subsequently, a second pressing and sealing assembly 8 is arranged in the sealing groove 202. The second pressing and sealing assembly 8 has the same structure as the first pressing and sealing assembly 7. The second pressing and sealing assembly 8 includes a second sealing channel steel 81, a second pressing channel steel 82, a second fastener 83 and a second sealing block 84. The second sealing channel steel 81 is connected in the sealing groove 202, connecting the intersection of the first coil 61 and the second coil 62 in the second sealing channel steel 81. Then, the second pressing channel steel 82 presses the intersection of the first coil 61 and the second coil 62 in the second sealing channel steel 81. The third coil 63 is laid on the outer sides of the first coil 61 and the second coil 62. The third coil 63 is located on the top side of the retaining wall 200 and extends respectively towards the inner and outer sides of the retaining wall 200. The middle part of the third coil 63 is recessed in the second sealing channel steel 81. The second fastener 83 passes through the second pressing channel steel 82 and the second sealing channel steel 81 and then penetrates into the top side inside of the retaining wall 200. Then, sealant is filled into the second pressing channel steel 82. After the sealant solidifies, a second sealing block 84 is formed in the second pressing channel steel 82, improving the sealing performance of the top side of the retaining wall 200.

[0043] Step S7: Trim and waterproof the closing edge of the second coil 62.

[0044] Reference Figure 1 and Figure 4 Specifically, first, a closing groove 201 is opened on the outer side of the retaining wall 200. A first pressing and sealing assembly 7 is arranged in the closing groove 201. The first pressing and sealing assembly 7 has the same structure as the second pressing and sealing assembly 8. The first pressing and sealing assembly 7 includes a first sealing channel steel 71, a first pressing channel steel 72, a first fastener 73 and a first sealing block 74. The closing edge of the second coil 62 bypasses the first sealing channel steel 71 and is folded between the first sealing channel steel 71 and the inner wall of the closing groove 201. The first sealing channel steel 71 presses the closing edge of the second coil 62 in the closing groove 201. The first pressing channel steel 72 presses a part of the second waterproof coil 6 located in the first sealing channel steel 71. The first fastener 73 passes through the first pressing channel steel 72 and the first sealing channel steel 71 and then penetrates into the outer side of the retaining wall 200. Then, sealant is filled into the first pressing channel steel 72. After the sealant solidifies, a first sealing block 74 is formed in the first pressing channel steel 72, which can improve the waterproof performance at the closing edge of the second coil 62. In this embodiment, the height of the closing groove 201 is flush with the roof floor slab 100. In other embodiments of this embodiment, the height of the closing groove 201 is lower than the height of the roof floor slab 100, thereby reducing the seepage of water from the retaining wall 200 to the roof floor slab 100.

[0045] Step S8: Lay a protective layer 5 on the waterproof layer 4. Reference Figure 1, apply cement mortar on the waterproof layer 4, and it should be tamped in time during spreading, and leveled with a screed. The drainage slope should meet the design requirements. After the cement mortar solidifies, a protective layer 5 is formed, which can provide protection for the waterproof layer 4. In other embodiments of this embodiment, plastering can also be carried out on the inner side, top side and outer side of the retaining wall 200, that is, a protective layer 5 is formed on the first coil 61, the third coil 63 and the second coil 62, which can not only improve the aesthetics of the retaining wall 200, but also provide protection for the first coil 61, the third coil 63 and the second coil 62 on the retaining wall 200.

[0046] Step S9: Water storage test: Sprinkle water on the roof and observe the leakage situation after standing for 48 h.

[0047] The implementation principle of a building roof waterproof structure and construction method in an embodiment of this application is as follows: A base layer 1, a thermal insulation layer 2, a leveling layer 3, a waterproof layer 4 and a protective layer 5 are sequentially arranged from bottom to top on the roof floor slab 100. A waterproof groove 203 is opened on the inner side of the retaining wall 200, and a third pressing and sealing assembly 9 is arranged in the waterproof groove 203. The third pressing and sealing assembly 9 presses and seals the corner coil 65, the first coil 61, the flat coil 64 and the filling coil 66 in the waterproof groove 203. A sealing groove 202 is opened on the top side of the retaining wall 200, and a second pressing and sealing assembly 8 is arranged in the sealing groove 202. The second pressing and sealing assembly 8 presses and seals the first coil 61, the second coil 62 and the third coil 63 in the sealing groove 202. A sealing groove 201 is opened on the outer side of the retaining wall 200, and a first pressing and sealing assembly 7 is arranged in the sealing groove 201. The first pressing and sealing assembly 7 presses and seals the second coil 62 in the sealing groove 202, thereby improving the waterproof performance of the closing edge of the second coil 62.

[0048] The above are all preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A building roof waterproof structure, characterized in that: The invention comprises a waterproofing coiled material (6) and a first pressing and sealing component (7), wherein the waterproofing coiled material (6) is laid on the inner side, the top side and the outer side of a retaining wall (200); the first pressing and sealing component (7) comprises a first sealing channel steel (71) and a first pressing channel steel (72); a sealing groove (201) is provided on the outer side of the retaining wall (200); the first sealing channel steel (71) is arranged in the sealing groove (201); the closing edge of the waterproofing coiled material (6) bypasses the first sealing channel steel (71) and is located between the first sealing channel steel (71) and the inner wall of the sealing groove (201); the first sealing channel steel (71) presses the closing edge of the waterproofing coiled material (6); the first pressing channel steel (72) is located in the first sealing channel steel (71); the first pressing channel steel (72) presses the waterproofing coiled material (6) located in the first sealing channel steel (71).

2. A building roof waterproof structure according to claim 1, characterized in that: The first compression sealing assembly (7) further comprises a first fastener (73), wherein the first fastener (73) passes through the first compression channel steel (72) and the first sealing channel steel (71) and penetrates into the retaining wall (200).

3. A building roof waterproof structure according to claim 2, characterized in that: The first compression sealing assembly (7) further comprises a first sealing block (74), wherein the first sealing block (74) is sealed in the first compression channel steel (72).

4. A building roof waterproof structure according to claim 1, characterized in that: The height of the sealing groove (201) is flush with the roof floor (100), or the height of the sealing groove (201) is lower than the height of the roof floor (100).

5. A building roof waterproof structure according to claim 1, characterized in that: The waterproofing coiled material (6) comprises a first coiled material (61) and a second coiled material (62), wherein the first coiled material (61) covers the inner side of the retaining wall (200), and the first coiled material (61) extends toward the top side of the retaining wall (200); the second coiled material (62) covers the outer side of the retaining wall (200), and the second coiled material (62) extends toward the top side of the retaining wall (200); A sealing groove (202) is provided on the top side of the retaining wall (200), and a second pressing sealing assembly (8) is arranged in the sealing groove (202), and the second pressing sealing assembly (8) comprises a second sealing channel steel (81) and a second pressing channel steel (82); the second sealing channel steel (81) is arranged in the sealing groove (202), the first coil (61) and the second coil (62) intersect in the second sealing channel steel (81), and the first coil (61) and the second coil (62) are connected at the intersection; the second pressing channel steel (82) presses the intersection of the first coil (61) and the second coil (62) in the second sealing channel steel (81).

6. A building roof waterproof structure according to claim 5, characterized in that: The waterproof coiled material (6) further comprises a third coiled material (63), wherein the third coiled material (63) is respectively connected to the first coiled material (61) and the second coiled material (62), the middle portion of the third coiled material (63) is connected to the inside of the second compression channel steel (82), and the two sides of the third coiled material (63) respectively extend toward the outside of the retaining wall (200) and the inside of the retaining wall (200).

7. A building roof waterproof structure according to claim 6, characterized in that: The second compression sealing assembly (8) further comprises a second fastener (83) and a second sealing block (84); the second fastener (83) passes through the second sealing channel steel (81) and the second compression channel steel (82) and penetrates into the retaining wall (200); and the second sealing block (84) is sealed in the second compression channel steel (82).

8. A building roof waterproof structure according to claim 5, characterized in that: A base layer (1), a thermal insulation layer (2) and a leveling layer (3) are sequentially arranged on the roof floor (100); the waterproofing roll (6) further comprises a plane roll (64), a corner roll (65) and a filling roll (66); the plane roll (64) is laid on the leveling layer (3); and the corner roll (65) is laid between the leveling layer (3) and the retaining wall (200); A waterproof groove (203) is provided on the inner side of the retaining wall (200). A third pressing and sealing assembly (9) is arranged in the waterproof groove (203). The third pressing and sealing assembly (9) comprises a third sealing channel steel (91) and a third pressing channel steel (92). The third sealing channel steel (91) presses the corner coil (65) into the waterproof groove (203). The first coil (61) and the plane coil (64) intersect in the third sealing channel steel (91). The third pressing channel steel (92) presses the intersection of the first coil (61) and the plane coil (64) into the third sealing channel steel (91). The filling coil (66) is connected to the first coil (61) and the plane coil (64) respectively. The middle part of the filling coil (66) is connected to the third pressing channel steel (92).

9. A building roof waterproof structure according to claim 8, characterized in that: The third compression sealing assembly (9) further comprises a third fastener (93) and a third sealing block (94); the third fastener (93) passes through the third sealing channel steel (91) and the third compression channel steel (92) and penetrates into the retaining wall (200); and the third sealing block (94) is sealed in the third compression channel steel (92).

10. A construction method for a building roof waterproof structure, characterized in that: Using the building roof waterproof structure as described in any one of claims 1 to 9 comprises the following steps: A sealing groove (201) is provided on the outer side of the retaining wall (200), and a waterproofing membrane (6) is laid on the inner side, the top side and the outer side of the retaining wall (200); The closed edge of the waterproof coiled material (6) is passed around the first sealing channel steel (71) and is located between the first sealing channel steel (71) and the inner wall of the sealing groove (201), and then the first sealing channel steel (71) presses the closed edge of the waterproof coiled material (6) into the sealing groove (201); Inserting the first pressing channel steel (72) into the first sealing channel steel (71) so that a portion of the waterproofing coiled material (6) is pressed between the first pressing channel steel (72) and the first sealing channel steel (71); Passing the first fastener (73) through the first pressing channel steel (72) and the first sealing channel steel (71), so that the first fastener (73) penetrates into the retaining wall (200); The sealant is filled into the first compression channel steel (72), and then the sealant solidifies to form a first sealing block (74), and the first sealing block (74) is made flush with the outer side of the retaining wall (200).

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