Construction method for anti-seepage structure of double-layer curved-surface metal roof

Abstract

The invention discloses a construction method for an anti-seepage structure of a double-layer curved metal roof, which comprises the following steps of: after a steel structure roof main body is constructed, constructing a roof purline according to a design drawing, and measuring and paying off on the roof purline to determine the mounting positions of a roof inner plate and the roof purline; roof ditches and gutter inlets are firstly constructed on the periphery of the steel structure roof body according to design drawing requirements, and then roof inner plates are constructed; a waterproof cover plate is arranged at a non-undercut abutted seam of the roof inner plate at the ridge line; then aluminum alloy frame construction is conducted on the roof inner plate; roof outer plate laying construction is conducted on the aluminum alloy frame; and finally, blocking construction is conducted on gaps between the adjacent roof outer plates located at the ridge line. The waterproof cover plate has the advantages that the problems that the waterproof cover plate of the curved roof is difficult to install, the waterproof treatment reliability of the non-undercut splicing part is insufficient, the waterproof structure at the ridge line lacks a systematic solution, and the waterproof collaboration between double-layer structures is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a construction method for a double-layer curved metal roof anti-seepage structure. Background Art

[0002] During conventional metal roof construction, roof panels are often welded together using continuous stainless steel plates, resulting in a continuous surface that provides excellent waterproofing. However, for the ridge joints, the regular, parallel panels are typically welded using an undercut. While this traditional construction method can meet the waterproofing requirements of ordinary flat roofs, it has significant shortcomings when dealing with complex curved structures.

[0003] For the construction of double-layer curved metal roofs, since the outer panels are usually fluorocarbon-sprayed hyperbolic aluminum panels, and the closing position of the outer panels is a circular arc surface, the only way to deal with the splicing positions that cannot be locked after the roof is constructed is to seal the edges with glue. This situation is particularly serious at the intersection of ridges, non-biting edges, and cut plate joints, resulting in frequent roof leaks. In the existing technology, the waterproofing treatment of curved roofs mainly has the following problems: first, the waterproof cover plate on the curved surface is difficult to install and it is difficult to achieve effective sealing; second, the waterproofing treatment of the non-biting splicing area is not reliable enough; third, there is a lack of systematic solutions for the waterproofing structure at the ridge line; and finally, the waterproofing synergy between the double-layer structures is poor. These problems have seriously affected the waterproofing performance and service life of the double-layer curved metal roof.

[0004] Therefore, how to solve the leakage problem of the non-biting edge part of the curved surface of the metal roof, improve the overall anti-penetration effect of the double-layer curved metal roof, and ensure the structural stability and durability has become an urgent problem to be solved by technical personnel in this field. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a construction method for a double-layer curved metal roof anti-seepage structure, which has the advantages of solving the problems of difficult installation of curved roof waterproof cover plates, insufficient reliability of waterproof treatment at non-biting edge joints, lack of systematic solutions for waterproof structures at ridge lines, and poor waterproof synergy between double-layer structures.

[0006] The present invention provides a construction method for a double-layer curved metal roof anti-seepage structure, 1. A construction method for a double-layer curved metal roof anti-seepage structure, characterized in that it comprises the following steps:

[0007] Step 1: After the main construction of the steel structure roof is completed, construct the roof purlins according to the design drawings, and measure and lay out the lines on the roof purlins to determine the installation positions of the roof inner panels and roof purlins;

[0008] Step 2: First, construct the roof gutters and rainwater inlets around the main body of the steel structure roof according to the design drawings, and then construct the roof inner panels. The roof inner panels are fixed to the purlins through the first connectors, and an additional drainage structure made of a metal bottom plate is installed below the special splicing non-biting inclined groove between adjacent roof inner panels and connected to the gutter;

[0009] Step 3: Install a waterproof cover plate at the non-bite seam of the roof inner panel at the ridge line; then construct an aluminum alloy frame on the roof inner panel, pass the aluminum alloy frame and the roof inner panel and fix the second connector;

[0010] Step 4: Lay the roof outer panels on the aluminum alloy frame, and quickly install the roof outer panels and the aluminum alloy frame through clips; finally, seal the gaps between adjacent roof outer panels at the ridge line.

[0011] Furthermore, the waterproof cover plate is arranged across the ridge line and both ends are respectively connected and fixed to the corresponding side roof inner panels.

[0012] Furthermore, the roof inner panel has a corrugated structure in a cross section parallel to the ridge line, and the waterproof cover plate is formed with a flange portion facing outward toward the top surface of the roof inner panel when located at a high position on the roof inner panel and is connected and fixed to the roof inner panel through the flange portion.

[0013] Furthermore, the waterproof cover plate is sealed by bonding with a sealant when located at the lower surface of the roof inner plate.

[0014] Furthermore, a foam strip and a waterproof material are provided on the inner side of the waterproof cover plate at the bonding location of the sealant.

[0015] Furthermore, in step 2, the roof inner plate is bent vertically upward at the end portion close to the ridge line to form an arc-shaped section for waterproofing.

[0016] Furthermore, in step 4, the gaps between the roof outer panels on both sides of the ridge line are filled and sealed by foam strips, and a sealant is provided above the foam strips.

[0017] Furthermore, in step 2, the construction of the roof inner panel is specifically to use a press machine to press the metal material into a shape to finally form the roof inner panel; wherein the roof inner panel is constructed vertically according to the ridge line in the ordinary part, and the roof inner panel is fixedly connected to the purlin through the first connecting piece.

[0018] The present invention has the following beneficial effects:

[0019] (1) The present invention can extend the service life of buildings and improve the safety of buildings, effectively enhance the waterproofing capacity of metal roofs, effectively prevent rainwater and condensation water from entering the roof structure, avoid electrical short circuits and structural damage inside the interlayer caused by leakage, and ensure the safe use of buildings.

[0020] (2) Improve the beauty of buildings. Metal roof waterproofing treatment can not only prevent leakage, but also keep the surface of the building clean and beautiful. Metal roof waterproofing treatment can adapt to various complex environmental conditions. Solving metal roof waterproofing leakage can not only extend the service life of the building, improve safety, and reduce maintenance costs, but also improve the indoor environment, save energy and reduce consumption, improve the beauty of the building, and adapt to complex environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the overall structure of the stainless steel roof anti-leakage structure at the ridge of the present invention;

[0023] Figure 2 yes Figure 1 A magnified view of point A;

[0024] Figure 3 It is a structural schematic diagram of the ditch in the present invention;

[0025] Figure 4 yes Figure 1 A magnified view of point A;

[0026] Explanation of the accompanying reference numerals: 1-purlin; 2-roof inner panel; 3-waterproof cover; 4-flange; 5-foam strip; 6-waterproof material; 7-arc segment; 8-aluminum alloy frame; 9-roof outer panel; 10-first connecting piece; 11-fastener; 13-sealant; 14-ditch; 15-second connecting piece. DETAILED DESCRIPTION

[0027] The present application proposes a construction method for a double-layer curved metal roof anti-seepage structure, comprising the following steps: after the main body of the steel structure roof is constructed, the roof purlin 1 is constructed according to the design drawings, and the installation positions of the roof inner plate 2 and the roof purlin 1 are determined by measuring and laying out on the roof purlin 1; the roof gutters and rainwater inlets are first constructed around the main body of the steel structure roof according to the requirements of the design drawings, and then the roof inner plate 2 is constructed, wherein the roof inner plate 2 is fixedly installed on the purlin 1 through a first connecting member 10, and a special splicing non-biting edge is formed between adjacent roof inner plates 2. Below the inclined ditch, an additional hydrophobic structure made of a metal base plate is provided and connected to the ditch; a waterproof cover plate 3 is provided at the non-biting seam of the roof inner plate 2 at the ridge line; then an aluminum alloy frame 8 is constructed on the roof inner plate 2, wherein the aluminum alloy frame 8 and the roof inner plate 2 are fixedly installed by a second connecting member 15; the roof outer plate 9 is laid on the aluminum alloy frame 8, wherein the roof outer plate 9 and the aluminum alloy frame 8 are quickly installed by buckles; finally, the gap between adjacent roof outer plates 9 at the ridge line is sealed.

[0028] Among them, the installation position of the roof inner panel 2 is determined by measurement and layout, and the measurement and layout can be accurately positioned using a total station or a laser level. The roof outer panel 9 is a 3mm thick fluorocarbon sprayed hyperbolic aluminum plate; the first connecting member 10 is an L-shaped fixed mounting seat, and the specific specifications are determined according to the roof load calculation, and the metal base plate of the additional hydrophobic structure is preferably made of stainless steel or galvanized steel. The material of the waterproof cover plate 3 can be selected from aluminum alloy or stainless steel, and its installation method includes mechanical fixation or adhesive fixation. The profile cross-section of the aluminum alloy frame 8 can be rectangular or trapezoidal, and the second connecting member 15 is also an L-shaped fixed mounting seat. The snap-on installation system of the roof outer panel 9 can adopt hidden or exposed snap-ons, and the gap sealing material can be selected from polyurethane foam or silicone sealant 13.

[0029] This construction method effectively addresses leakage issues at non-undercut joints on double-layer curved metal roofs by installing an additional hydrophobic structure and a waterproof cover plate 3. The additional hydrophobic structure directs accumulated water from the diagonal grooves into the gutter system, preventing water infiltration. The waterproof cover plate 3 provides continuous coverage of the non-undercut joints at the ridge line, blocking the path for rainwater to penetrate, ultimately diverting rainwater along the inner roof plate 2 into the gutter. Compared to conventional continuously welded stainless steel plate solutions, this method utilizes a modular installation method, more adaptable to the curved surface characteristics of the hyperbolic aluminum plate. Multiple waterproofing measures also enhance overall anti-seepage performance. The use of an aluminum alloy frame 8 in conjunction with a snap-on mounting system ensures structural stability while improving construction efficiency. At the same time, it also reduces maintenance costs; because large metal roofs are installed in blocks, leakage points are hidden, and after water accumulates, there are gaps or overflows in the glued joints that leak; maintenance can only be done by removing the panels to check for leakage. Even if the leakage point is found, due to the small internal space, special equipment must be used to lift the panels to remove and re-construct. Due to the biting of the panels, the demolition area is large and restoration is also more difficult; the freight of scattered panels is high, the cost is expensive, and maintenance is difficult; therefore, the maintenance costs caused by leakage can be reduced.

[0030] In this embodiment, a waterproof cover plate 3 is arranged across the ridge line, with both ends connected and fixed to the corresponding side inner roof panels 2. The waterproof cover plate 3 has a continuous covering structure in the cross section parallel to the ridge line, and its ends are rigidly connected to the inner roof panels 2 through mechanical fixation or welding. In specific implementation, the waterproof cover plate 3 can be made of weather-resistant metal materials such as stainless steel and aluminum alloy, and its width should ensure that it completely covers the joint area on both sides of the ridge line. During installation, the waterproof cover plate 3 is first pre-positioned, and then the two ends are fixed to the inner roof panels 2 using self-tapping screws or rivets. Finally, the connection is sealed.

[0031] This technical solution effectively blocks rainwater infiltration along non-undercut joints by installing a continuous waterproof cover plate 3 across the ridgeline. The rigid connection between the waterproof cover plate 3 and the inner roof panel 2 ensures structural stability and prevents cracking at the joints due to wind loads or thermal deformation. In practice, the flap design of the waterproof cover plate 3 further directs rainwater flow and prevents water infiltration. Different cover plate materials can be selected based on actual project requirements, ensuring high adaptability.

[0032] In this embodiment, the roof inner panel 2 has a corrugated structure in a cross section parallel to the ridge line. When the waterproof cover plate 3 is located at a high position on the roof inner panel 2, a flange portion 4 is formed outwardly toward the top surface of the roof inner panel 2 and is connected and fixed to the roof inner panel 2 via the flange portion 4. The roof inner panel 2 is a corrugated plate with a corrugated structure, specifically an aluminum-magnesium-manganese alloy plate. The corrugated structure means that the roof inner panel 2 forms a continuous wavy cross section in a direction parallel to the ridge line. This structure can enhance the rigidity and drainage performance of the plate. The flange portion 4 of the waterproof cover plate 3 is formed by bending the edge of the cover plate outward. The specific shape of the flange portion 4 can be a right-angle bend or an arc bend. The connection method of the flange portion 4 to the roof inner panel 2 includes but is not limited to: fixing with rivets, bolts or welding. In this solution, self-tapping screws are specifically used for fixing. This technical solution effectively solves the leakage problem of the non-biting joint at the ridge line of the curved metal roof by providing the waterproof cover plate 3 with a flange 4 and fixing it to the corrugated roof inner plate 2. The corrugated roof inner plate 2 can provide a stable support surface, while the waterproof cover plate 3 with the flange 4 forms a reliable mechanical connection and waterproof barrier.

[0033] In this embodiment, the waterproof cover plate 3 is bonded and sealed by a sealant 13 when it is located at the lower surface of the roof inner panel 2. A foam strip 5 and a waterproof material 6 are also provided on the inner side of the waterproof cover plate 3 at the bonding point of the sealant 13; the sealant 13 is made of polyurethane sealant or silicone sealant, and the foam strip 5 is made of closed-cell polyethylene material with a circular or rectangular cross-section; the waterproof material 6 is EVA waterproof cotton. This solution first uses the sealant 13 to achieve bonding and sealing between the waterproof cover plate 3 and the roof inner panel 2 when the waterproof cover plate 3 is located at the lower surface of the roof inner panel 2, and then arranges the foam strip 5 inside the waterproof cover plate 3 near the sealant 13, and then arranges the EVA waterproof cotton to form a composite waterproof system at the lower surface of the roof inner panel 2 through a multi-layer waterproof structural design. The sealant 13 provides the first waterproof barrier, and the foam strip 5 plays a buffering and supporting role to prevent the sealant 13 from cracking; the waterproof material 6 serves as the second waterproof barrier, complementing the sealant 13. This structure effectively addresses the problem of seal failure at the lower surface of curved metal roofs due to deformation, offering greater durability and waterproofing reliability than a single caulking method. The multi-layered structure maintains a stable seal, especially under the effects of temperature fluctuations, deformation, and wind pressure, preventing potential leaks.

[0034] In this embodiment, during the construction of the main steel roof structure, the inner roof panel 2 is bent vertically upward at its end near the ridge line to form a curved segment 7 for waterproofing. This technical solution effectively addresses leakage issues at the ridge joint by bending the end of the inner roof panel 2 to form the curved segment 7. The curved structure guides water along a predetermined path, preventing water accumulation. The upward bend increases the length of the waterproof path, providing a physical barrier to prevent water penetration even if the sealant 13 ages and fails.

[0035] In this embodiment, in step 2, the construction of the roof inner panel 2 is specifically to use a press to press the metal material into a shape to finally form the roof inner panel 2; wherein the roof inner panel 2 is constructed perpendicularly to the ridge line at the ordinary part, and the roof inner panel 2 is fixedly connected to the purlin 1 through the first connecting member 10. Specifically, the metal material is processed by the press to form the roof inner panel 2 with a specific cross-sectional shape. As a preferred embodiment, the press can use a continuous roll forming process to gradually press the metal coil into the required corrugated cross-section. wherein, the installation direction of the roof inner panel 2 at the ordinary part remains perpendicular to the ridge line to ensure smooth drainage. The first connecting member 10 can use self-tapping screws or rivets to fix the roof inner panel 2 to the purlin 1. further, at the end near the ridge line, the roof inner panel 2 is processed into a vertically upwardly bent arc segment 7, and the arc segment 7 cooperates with the waterproof cover plate 3 to form a double waterproof structure.

[0036] This technical solution, through standardized processing and specialized installation methods, addresses the technical challenges of precision molding and positioning for curved metal roof inner panels 2. The press-forming process ensures consistent cross-sectional shape, the perpendicular ridgeline installation optimizes drainage paths, and the inclusion of curved segments 7 enhances waterproofing in key areas. Compared to existing technologies, this solution not only improves construction efficiency but also significantly enhances the anti-leakage effectiveness of the roof inner panels 2 through structural optimization.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A construction method for a double-layer curved metal roof anti-seepage structure, characterized by: The following steps are involved: Step 1: After the main construction of the steel structure roof is completed, construct the roof purlins according to the design drawings, and measure and lay out the lines on the roof purlins to determine the installation positions of the roof inner panels and roof purlins; Step 2: First, construct the roof gutters and rainwater inlets around the main body of the steel structure roof according to the design drawings, and then construct the roof inner panels. The roof inner panels are fixed to the purlins through the first connectors, and an additional drainage structure made of a metal bottom plate is installed below the special splicing non-biting inclined groove between adjacent roof inner panels and connected to the gutter; Step 3: Install a waterproof cover plate at the non-bite seam of the roof inner panel at the ridge line; then construct an aluminum alloy frame on the roof inner panel, pass the aluminum alloy frame and the roof inner panel and fix the second connector; Step 4: Lay the roof outer panels on the aluminum alloy frame, and quickly install the roof outer panels and the aluminum alloy frame through clips; finally, seal the gaps between adjacent roof outer panels at the ridge line.

2. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 1, characterized in that: The waterproof cover plate is arranged across the ridge line and both ends are respectively connected and fixed to the corresponding side roof inner plates.

3. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 2, characterized in that: The roof inner plate has a corrugated structure in a cross section parallel to the ridge line. When the waterproof cover plate is located at a high position on the roof inner plate, a flange portion is formed outwardly toward the top surface of the roof inner plate and is connected and fixed to the roof inner plate through the flange portion.

4. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 2, characterized in that: The waterproof cover plate is sealed by adhesive when located at the lower surface of the roof inner plate.

5. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 2, characterized in that: The inner side of the waterproof cover plate is further provided with a foaming strip and a waterproof material at the sealing adhesive bonding location.

6. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 1, characterized in that: In step 2, the roof inner plate is bent vertically upward at the end portion close to the ridge line to form an arc-shaped section for waterproofing.

7. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 1, characterized in that: In step 4, the gaps between the roof outer panels on both sides of the ridge line are filled and sealed by foam strips, and a sealant is provided above the foam strips.

8. The construction method for a double-layer curved metal roof anti-seepage structure according to claim 1, characterized in that: In step 2, the construction of the roof inner panel is specifically to use a press to press the metal material into a shape to finally form the roof inner panel; wherein the roof inner panel is constructed vertically according to the ridge line in the general part, and the roof inner panel is fixedly connected to the purlin through the first connecting piece.

Images