Waterproof construction method for steel column penetrating through metal roof

Abstract

The invention relates to a waterproof construction method for a steel column penetrating through a metal roof, the waterproof sealing performance is good, according to the scheme, the metal roof and the steel column penetrating through the metal roof are included, and an upper-layer flashing plate, an upper-layer waterproof coiled material, a lower-layer flashing plate, a galvanized steel flat plate and a lower-layer waterproof coiled material are sequentially arranged from top to bottom; wherein the lower-layer waterproof coiled material is laid on heat preservation cotton around the steel column and is fixed on the steel column in an upturning mode, the galvanized steel flat plate, the upper-layer flashing plate and the lower-layer flashing plate are all annular and are arranged on the steel column in a sleeving mode, the inner ring of the galvanized steel flat plate is welded on the steel column in a surrounding mode, the inner ring of the lower-layer flashing plate is bent upwards to form an upper turnup, and the upper turnup is welded on the steel column in a surrounding mode. The upper layer waterproof coiled material is laid along the surface of the lower layer flashing plate, the upper layer waterproof coiled material is upturned to the steel column and covers the upturned edge, the other side of the upper layer waterproof coiled material extends to the metal roof, a Z-shaped aluminum plate is arranged between the upper layer flashing plate and the lower layer flashing plate to serve as a support, and the end portion of the waterproof coiled material is sealed through sealant.

Description

Technical Field

[0001] The invention relates to waterproof treatment of roofs, and in particular to a waterproof construction method in which steel columns penetrate metal roofs. Background Art

[0002] With the widespread adoption of steel structures, some large buildings often utilize double-layer metal roofs. This involves installing a layer of elevated decorative metal panels or large billboards on top of the metal roof. This requires steel columns to penetrate the metal roof as support for the panels or billboards. Leakage is a common problem with metal roof structures, and leaks at the roof openings are a particularly serious source of leaks. Metal panels have a high thermal conductivity. When the ambient temperature fluctuates significantly, the panel shrinks and deforms due to the large temperature difference, resulting in significant displacement at the joints. This makes these joints highly susceptible to leaks. Furthermore, since steel structures predominate in metal roof systems, they are susceptible to elastic deformation due to temperature fluctuations or external forces such as wind and snow loads. This can cause displacement at the joints, leading to potential leaks. The causes of metal roof leaks are multifaceted, but the key lies in the rationality of the design and construction process. Design is the foundation of all safety and functional requirements, and ensuring the safety, suitability, and cost-effectiveness of the joints should be a top priority during the design phase.

[0003] Regarding the waterproof design of penetrating metal roofs, there are already many waterproof solutions in the prior art, such as: Publication No. CN115749160A and Publication No. CN116591406A respectively provide two different waterproof solutions for penetrating metal roofs, but both solutions have a common problem, namely: the first waterproof measure on the outdoor side is to isolate the vertical steel column through a flexible roll or rubber gasket, and fix it with glue using a clamp. Specifically, in CN115749160A, the first waterproof measure on the outdoor side is to lay a second waterproof roll on the surface of the steel column, use a second stainless steel clamp to press the second waterproof roll, and apply silicone weatherproof sealant at the connection between the second waterproof roll and the steel column. In CN116591406A, the first waterproof measure on the outdoor side is to set a rubber gasket and sealant between the vertical installation panel and the steel frame column, and use a clamp to press the vertical installation panel onto the steel frame column. As can be seen, the first waterproofing measure on the exterior side of the two aforementioned patents relies on sealing between steel columns and waterproofing coils or rubber gaskets. However, due to the different expansion coefficients of the steel columns and the flexible coils or rubber gaskets, the steel columns can experience significant deformation and displacement in extreme weather conditions, causing the flexible coils or rubber gaskets to become detached or loosened from the steel columns, thereby rendering the first waterproofing measure ineffective. Therefore, the first waterproofing measure in the aforementioned prior art is not actually effective. Summary of the Invention

[0004] The present invention discloses a waterproof construction method for steel columns penetrating a metal roof. Five waterproof structures are successively arranged, and the problem of the difference in expansion coefficient between the steel columns and the waterproof material is fully considered. The multiple waterproof structures adopt a design of interlacing waterproof structures of different materials, which effectively improves the waterproof effect of each waterproof structure and ensures that the metal roof has good waterproof sealing as a whole.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A waterproof construction method for steel columns penetrating a metal roof comprises the following steps: Step 1): Lay the lower layer of waterproof membrane on the main body of the roof around the steel column, turn the lower layer of waterproof membrane up and fix it on the outer wall of the steel column; Step 2): Install the aluminum alloy support on the metal roof, and fix the aluminum alloy support to the metal roof T-shaped support with screws; Step 3): Place a ring-shaped galvanized steel plate on the steel column, weld the inner ring of the galvanized steel plate to the steel column, and make the flange plate on the top of the aluminum alloy support support the galvanized steel plate; Step 4): A circular lower flashing plate is installed on the steel column above the galvanized steel flat plate. The inner edge of the lower flashing plate is bent upward to form an upper flange, and the upper flange is welded to the steel column. The outer edge of the lower flashing plate is bent downward to form a lower hanging plate. The galvanized steel flat plate is located on the inner side of the lower hanging plate of the lower flashing plate, and the lower flashing plate is laid on the galvanized steel flat plate. Step 5): Lay the upper waterproof membrane on the top surface of the lower flashing board, turn the upper waterproof membrane up and cover the upper edge of the lower flashing board, fix the upper waterproof membrane on the steel column, and lay the other end of the upper waterproof membrane along the lower hanging plate of the lower flashing board to the metal roof; Step 6): Install the Z-shaped aluminum plate on the top of the lower flashing plate, press the lower flange of the Z-shaped aluminum plate on the upper waterproof membrane, and use rivets to fix the lower flashing plate and the galvanized steel flat plate to the flange plate of the aluminum alloy support; Step 7): An annular upper flashing plate is mounted on the steel column above the Z-shaped aluminum plate. The inner circle of the upper flashing plate is welded to the steel column. The upper folded portion of the upper waterproof membrane is located at the lower part of the upper flashing plate. The upper flange of the Z-shaped aluminum plate supports the upper flashing plate. The upper flashing plate is fixed to the upper flange of the Z-shaped aluminum plate by rivets. The outer circle edge of the upper flashing plate is bent downward to form a lower hanging plate. The radial width of the upper flashing plate is greater than the radial width of the lower flashing plate.

[0006] Furthermore, the rivet heads are coated with sealant.

[0007] Furthermore, the flashing plate is made of galvanized steel plate or aluminum plate.

[0008] Furthermore, the upwardly turned end portion of the waterproof membrane is sealed with a sealant.

[0009] Furthermore, the upward folded portion of the waterproof coiled material is fixed to the steel column with a stainless steel clamp.

[0010] Furthermore, the bottom end of the lower hanging plate of the upper flashing plate is tilted and bent toward the steel column side to form a hook shape.

[0011] The waterproof structure designed by the present invention has a total of five waterproof structures from top to bottom, namely the upper flashing plate, the second layer of waterproof membrane, the lower flashing plate, the galvanized steel flat plate, and the first layer of waterproof membrane. It can be seen that the above five waterproof structures are composed of metal plates and flexible materials interlaced to avoid the problem of waterproof failure caused by the difference in expansion coefficient between flexible materials and steel columns when waterproofing is performed alone; compared with the prior art that directly uses waterproof membranes at the top, the top waterproofing of the present invention is achieved through the upper flashing plate, which is usually a galvanized steel plate or aluminum plate, and is made of metal like the steel column. The difference in expansion coefficient is very small, and the problem of the two being detached due to deformation of the steel column will not occur, making the waterproof sealing performance of the scheme designed by the present invention significantly better than that of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the waterproof structure of the steel column penetrating the metal roof in the embodiment; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 Schematic diagram of the structure of the aluminum alloy support.

[0013] Reference numerals: 1. Metal roof; 2. Waterproof membrane; 3. Stainless steel clamps; 4. Galvanized steel flat plate; 5. Flashing board; 6. Rivets; 7. Aluminum alloy support; 8. Z-shaped aluminum plate; 9. Sealant; 10. Steel column. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] This embodiment discloses a waterproof structure in which steel columns penetrate a metal roof. Figure 1 and Figure 2 As shown, the structure mainly includes a metal roof 1, steel columns 10 penetrating the metal roof 1, waterproof membrane 2, stainless steel clamps 3, galvanized steel flat plates 4, flashing plates 5, aluminum alloy supports 7, and Z-shaped aluminum plates 8. In this embodiment, five waterproof structures are provided for the waterproofing treatment at the location where the steel columns 10 penetrate the metal roof 1, namely the first waterproof structure to the fifth waterproof structure from top to bottom.

[0016] Among them, the first waterproof structure is set up as follows: an annular upper flashing plate 5 is mounted on the steel column 10, and the inner circle of the upper flashing plate 5 is welded to the steel column 10 by circumferential welding to avoid a gap between the upper flashing plate 5 and the steel column 10. The outer circle edge of the upper flashing plate 5 is bent downward to form a lower hanging plate, and the bottom end of the lower hanging plate is bent obliquely toward the steel column 10 to form a hook shape. The lower hanging plate can block rainwater on the outside of the lower hanging plate, and the hook-shaped bend can increase the strength of the lower hanging plate and reduce the hidden danger of rainwater backflow.

[0017] The third waterproof structure is as follows: an annular lower flashing plate 5 is installed below the upper flashing plate 5. The inner edge of the lower flashing plate 5 is bent upward to form an upper flange, which is then welded to the outer wall of the steel column 10. The outer edge of the lower flashing plate 5 is also bent downward to form a lower hanging plate. However, the radial width of the upper flashing plate 5 is greater than that of the lower flashing plate 5, so that the lower hanging plate of the upper flashing plate 5 is located outside the lower hanging plate of the lower flashing plate 5, thereby blocking most rainwater.

[0018] To strengthen support for the upper flashing plate 5, a Z-shaped aluminum plate 8 is installed between the upper and lower flashing plates 5. The upper flashing plate 5 is secured to the upper flange of the Z-shaped aluminum plate 8 with rivets 6. In this embodiment, all rivets 6 are coated with sealant for waterproofing. The lower flange of the Z-shaped aluminum plate 8 is also secured to the lower flashing plate 5 with rivets 6. Both the upper and lower flashing plates 5 are constructed of galvanized steel or aluminum to prevent gaps at the connection with the steel column 10 due to deformation caused by a significant difference in expansion coefficient. Waist-shaped holes are provided in the lower flange of the Z-shaped aluminum plate 8 to facilitate drainage.

[0019] The second waterproofing structure is as follows: an upper layer of waterproofing membrane 2 is laid along the top surface of the lower flashing plate 5. One side of the upper layer of waterproofing membrane 2 is folded up onto the outer wall of the steel column 10, with the folded portion of the upper layer of waterproofing membrane 2 overlapping the upper edge of the lower flashing plate 5. The folded portion of the upper layer of waterproofing membrane 2 is secured to the steel column 10 with a stainless steel clamp 3, and the gap between the folded end and the steel column 10 is sealed with sealant 9. The other side of the upper layer of waterproofing membrane 2 is laid along the surface of the lower cladding plate of the lower flashing plate 5 and extended to the metal roof 1, where it is fully adhered. This prevents rainwater dripping from the lower cladding plate of the upper flashing plate 5 from entering the inner side of the lower cladding plate of the lower flashing plate 5. When laying the upper layer of waterproofing membrane 2, the lower flashing plate 5 is installed first, followed by the upper layer of waterproofing membrane 2. Finally, the Z-shaped aluminum plate 8 is installed, ensuring that the lower flange of the Z-shaped aluminum plate 8 can press against the upper layer of waterproofing membrane 2.

[0020] The fourth waterproof structure is set up as follows: an annular galvanized steel flat plate 4 is set at the lower part of the lower flashing plate 5, the galvanized steel flat plate 4 is sleeved on the steel column 10, the inner circle of the galvanized steel flat plate 4 is welded to the steel column 10, and the outer circle edge of the galvanized steel flat plate 4 is located on the inner side of the lower hanging plate of the lower flashing plate 5. The lower flashing plate 5, the lower flange of the Z-shaped aluminum plate 8 and the galvanized steel flat plate 4 are fixed together with rivets 6.

[0021] In order to strengthen the support of the lower flashing plate 5 and the galvanized steel flat plate 4, in this embodiment, a Figure 3 The aluminum alloy support member 7 shown in the figure has its lower portion fixed on the metal roof wave crest, and its upper portion forms a flange plate. The lower flashing plate 5, the lower flange of the Z-shaped aluminum plate 8 and the galvanized steel flat plate 4 are fixed to the flange plate of the aluminum alloy support member 7 with rivets 6.

[0022] The fifth waterproof structure is set up as follows: the lower layer of waterproof membrane 2 is laid on the insulation cotton of the metal roof 1 around the lower steel column 10 of the galvanized steel flat plate 4, and the lower layer of waterproof membrane 2 is folded up from the upper side of the insulation cotton of the metal roof 1 to the outer wall of the steel column 10. The folded part of the lower layer of waterproof membrane 2 is fixed to the steel column 10 with a lower stainless steel clamp 3, and the gap between the folded end of the lower layer of waterproof membrane 2 and the steel column 10 is sealed with sealant 9.

[0023] The present invention employs a five-layer waterproofing structure. The topmost layer of waterproofing utilizes a metal flashing plate 5 to block rainwater. The flashing plate 5 and the steel column 10 are made of the same metal, resulting in a very small difference in their coefficient of expansion. Even in extreme weather, deformation of the steel column 10 does not create a deformation gap at the connection with the flashing plate 5. This approach, unlike the prior art method of directly using flexible materials as the first layer of waterproofing, truly maximizes the sealing effect of the first layer of waterproofing. The present invention employs upper and lower layers of waterproof membrane 2, each positioned beneath the upper and lower flashing plates 5. Using the flashing plate 5 as a flexible waterproof membrane 2 serves to block rainwater, reducing the possibility of water seepage through the gap between the steel column 10 and the waterproof membrane 2 due to deformation of the steel column 10.

[0024] The construction method of the waterproof structure given above is carried out according to the following steps: Step 1): Lay the lower layer of waterproof membrane 2 on the main body of the roof around the steel column 10, fix the upturned part of the lower layer of waterproof membrane 2 to the outer wall of the steel column 10 with a stainless steel clamp 3, and apply sealant 9 on the upturned end; Step 2): Install the aluminum alloy support 7 on the metal roof 1, and fix the aluminum alloy support 7 to the metal roof T-shaped support with screws; Step 3): Place the galvanized steel plate 4 on the steel column 10, weld the inner ring of the galvanized steel plate 4 to the steel column 10, and make the flange plate on the top of the aluminum alloy support 7 support the galvanized steel plate 4; Step 4): The lower flashing plate 5 is sleeved on the steel column 10 on the upper part of the galvanized steel plate 4, and the lower flashing plate 5 is laid on the galvanized steel plate 4, and the upper flange of the lower flashing plate 5 is welded to the steel column 10; Step 5): Lay the upper waterproof membrane 2 on the top surface of the lower flashing board 5, turn the upper waterproof membrane 2 up and cover the upper edge of the lower flashing board 5, fix the upper edge of the upper waterproof membrane 2 to the steel column 10 with a stainless steel clamp 3, and lay the other end of the upper waterproof membrane 2 along the lower hanging plate of the lower flashing board 5 to the metal roof 1; Step 6): Install the Z-shaped aluminum plate 8 on the top of the lower flashing plate 5, press the lower flange of the Z-shaped aluminum plate 8 on the upper waterproof membrane 2, and use rivets 6 to fix the lower flashing plate 5 and the galvanized steel flat plate 4 to the flange plate of the aluminum alloy support 7; Step 7): Install the upper flashing plate 5 on the steel column 10 on the upper part of the Z-shaped aluminum plate 8, weld the inner circle of the upper flashing plate 5 to the steel column 10, and fix the upper flashing plate 5 to the upper flange of the Z-shaped aluminum plate 8 by rivets 6.

[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof construction method for steel columns penetrating metal roofs, characterized in that: The steps include: Step 1): Lay the lower layer of waterproof membrane on the metal roof insulation cotton around the steel column, turn the lower layer of waterproof membrane up and fix it on the outer wall of the steel column; Step 2): Install the aluminum alloy support on the metal roof, and fix the aluminum alloy support to the metal roof T-shaped support with screws; Step 3): Place a ring-shaped galvanized steel plate on the steel column, weld the inner ring of the galvanized steel plate to the steel column, and make the flange plate on the top of the aluminum alloy support support the galvanized steel plate; Step 4): A circular lower flashing plate is installed on the steel column above the galvanized steel flat plate. The inner edge of the lower flashing plate is bent upward to form an upper flange, and the upper flange is welded to the steel column. The outer edge of the lower flashing plate is bent downward to form a lower hanging plate. The galvanized steel flat plate is located on the inner side of the lower hanging plate of the lower flashing plate, and the lower flashing plate is laid on the galvanized steel flat plate. Step 5): Lay the upper waterproof membrane on the top surface of the lower flashing board, turn the upper waterproof membrane up and cover the upper edge of the lower flashing board, fix the upper waterproof membrane on the steel column, and lay the other end of the upper waterproof membrane along the lower hanging plate of the lower flashing board to the metal roof; Step 6): Install the Z-shaped aluminum plate on the top of the lower flashing plate, press the lower flange of the Z-shaped aluminum plate on the upper waterproof membrane, and use rivets to fix the lower flashing plate and the galvanized steel flat plate to the flange plate of the aluminum alloy support; Step 7): An annular upper flashing plate is mounted on the steel column above the Z-shaped aluminum plate. The inner circle of the upper flashing plate is welded to the steel column. The upper folded portion of the upper waterproof membrane is located at the lower part of the upper flashing plate. The upper flange of the Z-shaped aluminum plate supports the upper flashing plate. The upper flashing plate is fixed to the upper flange of the Z-shaped aluminum plate by rivets. The outer circle edge of the upper flashing plate is bent downward to form a lower hanging plate. The radial width of the upper flashing plate is greater than the radial width of the lower flashing plate.

2. The waterproof construction method for steel columns penetrating metal roofs according to claim 1, characterized in that: The nail heads of the rivets are coated with sealant.

3. The waterproof construction method for steel columns penetrating metal roofs according to claim 1, characterized in that: The flashing plate is made of galvanized steel plate or aluminum plate.

4. The waterproof construction method for steel columns penetrating metal roofs according to claim 1, characterized in that: The upwardly turned end portion of the waterproof coiled material is sealed with a sealant.

5. The waterproof construction method for steel columns penetrating metal roofs according to claim 1, characterized in that: The upward folded portion of the waterproof coiled material is fixed on the steel column with a stainless steel clamp.

6. The waterproof construction method for steel columns penetrating metal roofs according to claim 1, characterized in that: The bottom end of the lower hanging plate of the upper flashing plate is tilted and bent toward the steel column side to form a hook shape.

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