Closing construction method for manhole and grid hole in aluminum-magnesium-manganese plate roof

Abstract

A closing construction method for a manhole and a grating hole in an aluminum-magnesium-manganese plate roof is characterized by comprising the following steps of a, prefabricating a plurality of supporting folding pieces according to design, b, measuring and paying off the hole, c, welding angle steel around the hole, d, conducting waterproof layer water break construction and laying TPO waterproof coiled materials, e, installing a roof plate, f, measuring, paying off and machining a hole edge covering plate, g, installing the supporting folding pieces, and h, folding the roof plate. And i, installing the water dripping folding piece. The closing construction method for the manhole and the grating hole in the aluminum-magnesium-manganese plate roof has the advantages that the waterproof performance is improved, the wind uplift resistance of the roof at the edge closing position is improved, the installation effect is attractive, the construction method is simple, folding parts are machined in a factory in advance and installed on site, the construction time is shortened, and the construction period is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of housing construction and installation engineering. Specifically, it is a construction method for closing the manholes and grille openings on an aluminum-magnesium-manganese plate roof. Background Art

[0002] The roof of a large exhibition hall needs to form a certain decorative effect, and the overall roof design needs to be simple and smooth in shape, preventing rainwater from flowing into the roof along the ends of the roof panels and being blown under the roof panels, which plays an important role in the wind uplift resistance performance of the roof; it needs to be tightly connected to the main structure of the metal roof, be able to bear a certain load, adapt to the deformation of the roof, and is not prone to loosening. However, in traditional practices, once problems occur at the manhole, due to the relatively complex structure, some surrounding components need to be removed during maintenance, increasing the difficulty and workload of maintenance, and it is more likely to have corrosion problems when exposed to harsh environments for a long time.

[0003] Therefore, the known construction methods for closing manholes have the above-mentioned various inconveniences and problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a safe and reliable construction method for closing the manholes and grille openings on an aluminum-magnesium-manganese plate roof.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows: A construction method for closing the manholes and grille openings on an aluminum-magnesium-manganese plate roof, characterized by including the following steps: a. Precast a number of support folding parts according to the design. The support folding parts are Z-shaped galvanized support folding parts with a thickness ≥ 2 mm; b. Measuring and setting out the openings According to the column section dimensions and positions in the design drawings, position and set out the formwork installation sidelines, and position the opening positions and roof battens during the roof structure construction stage; c. Welding angle steels around the openings According to the positions determined by the measuring and setting out, weld the angle steels to the main structure of the opening to ensure the accurate dimensions of the battens and the openings; carry out the construction of the roof vapor barrier, sound absorption, and insulation layers; d. Construction of water cutoff for the waterproof layer Lay the TPO waterproof coiled material, connect the waterproof coiled material firmly by hot air welding, strengthen the treatment of the node parts such as the inner and outer corners, pipe roots, and water outlets, and improve the waterproof performance by using additional layers; e. Installation of roof panels Check whether the installation surface of the aluminum-magnesium-manganese plate is flat, clean, without obvious deformation, scratches, color difference defects, whether the seaming connection between the plates is tight, without gaps or disconnection; conduct a water spray test on the roof or check after rain to see if there is any leakage on the roof; f. Measuring, setting out and processing the edge plates of the opening According to the position of the manhole in the design drawings, position and set out the installation edge line of the manhole; g. Installing the support folding parts After positioning and setting out, install the support folding parts on the purlins and fasten them with automatic nails; h. Folding the roof panels Fold the roof panels according to the design drawings and check the folding angle; i. Installing the drip folding parts Fix the lower end of the drip folding parts on the manhole skeleton and fix them together with the support folding parts on the roof panels using rivets.

[0006] The construction method for closing the manhole and grille opening on the aluminum-magnesium-manganese plate roof of the present invention can also be further realized by adopting the following technical measures.

[0007] In the aforementioned method, the angle steel is L50 galvanized angle steel.

[0008] In the aforementioned method, the spacing of the drip folding parts is not greater than 250 mm.

[0009] In the aforementioned method, the spacing of the rivets is not greater than 200 mm.

[0010] In the aforementioned method, the waterproof coiled material is a reinforced 1.5 mm thick TPO waterproof coiled material.

[0011] After adopting the above technical solutions, the construction method for closing the manhole and grille opening on the aluminum-magnesium-manganese plate roof of the present invention has the following advantages: 1. Improve the waterproof performance and the wind resistance performance of the roof at the edge closing part; 2. The installation effect is beautiful and the construction method is simple; 3. The folding parts are pre-fabricated in the factory and installed on site, reducing the construction time and being beneficial to shortening the construction period. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the Z-shaped galvanized support part of the embodiment of the present invention; Figure 2 It is a schematic diagram of closing the edge of the manhole folding plate of the embodiment of the present invention.

[0013] In the figure: 1 Z-shaped galvanized support part, 2 fixing parts, 3 steel channel, 4 TPO waterproof coiled material, 5 0.9 mm thick aluminum-magnesium-manganese folding part, 6 blind rivets, 7 stainless steel waterproof plate. Detailed Embodiments

[0014] The present invention will be further described below in conjunction with the embodiments and their accompanying drawings.

[0015] Example 1 Overall structural arrangement of the roof design of a large exhibition hall: Roof layer: 0.9mm thick aluminum-magnesium-manganese standing seam roof panel 65 / 400 (base material thickness 0.9mm, fluorocarbon spraying on the surface). Waterproof layer: 1.5mm thick TPO waterproofing membrane (enhanced type). Support purlins: 80x60x4mm steel channels (hot-dip galvanized, @1200mm in large areas, @≤800mm in edge areas). Insulation layer: 2 layers of 50mm thick rock wool, bulk density 160kg / m3, single-sided aluminum foil (laid crosswise, flat with the purlins). Vapor barrier: 0.3mm thick PE vapor-proof and moisture-proof membrane. Bottom plate: 0.8mm thick YX70-200-600 aluminized zinc perforated profiled steel sheet (base material thickness 0.8mm, PE polyester spraying treatment on the surface). Secondary purlins: 140x140x4mm steel channels (Q235 hot-dip galvanized, polyurethane paint spraying on the surface, @1200mm in large areas, @≤800mm in edge areas). Main purlins: 250x180x6mm steel channels (outside the curtain wall area). Main steel structure side line (outside the roof design area).

[0016] Structural principle of the construction method for closing the manholes and grille openings on the aluminum-magnesium-manganese plate roof of the present invention: When laying the aluminum-magnesium-manganese plates on the roof, the end of the roof panel extending into the manhole position is folded down by 45 degrees, so that rainwater rushes into the manhole due to inertia. A 3mm galvanized folding piece is used as a support and fixed below to prevent the end of the roof panel from shaking due to wind or rain erosion; at the junction of the side edge wrapping plate of the manhole and the roof panel, a Z-shaped folding piece is installed as a drip piece to prevent rainwater from flowing into the roof along the end of the roof panel and being blown into the lower part of the roof panel, which plays an important role in the wind uplift resistance performance of the roof.

[0017] Process flow of the construction method for closing the manholes and grille openings on the aluminum-magnesium-manganese plate roof of the present invention: Weld L50 galvanized angle steel around the opening → After grinding, perform anti-corrosion and painting → Construct the vapor barrier, sound-absorbing layer, and insulation layer → TPO waterproof layer → Install the roof panel → Measure and process the side edge wrapping plate of the opening → Install the support folding piece → Fold the roof panel → Install the drip folding piece.

[0018] Now please refer to Figure 1 and Figure 2 , the construction method for closing the manholes and grille openings on the aluminum-magnesium-manganese plate roof of the present invention includes the following steps: a. Precast several support folding pieces according to the design. The support folding pieces have two components: The first Z-shaped galvanized support folding piece, with a thickness of 2mm, the two arm lengths are the same, 50mm, and the middle connecting rod length is 29mm. The second Z-shaped galvanized support folding piece, with a thickness of 3mm, the two arm lengths are 50mm and 74mm, and the middle connecting rod length is 28mm.

[0019] b. Measure and lay out the openings. According to the column section size and position in the design drawings, professional surveying personnel will position and lay out the template installation edges. During the roof structure construction phase, the opening position and roof fascia must be positioned.

[0020] c. Weld L50 galvanized angle steel around the opening → Anti-corrosion and paint after grinding. Welding of L50 angle steel at the opening. According to the position determined by measuring and laying out, professionals weld the angle steel to the main structure of the opening, and the welding quality meets the requirements of the specification; after welding, the size of the slats should be confirmed again to ensure the accuracy of the size of the slats and the opening; then grind, anti-corrosion and paint. Carry out the construction of roof air insulation, sound absorption and insulation layer. The first Z-shaped galvanized support folding piece uses ST5.5*20 rivets 6@200mm to fix the 0.9mm thick aluminum-magnesium-manganese folding piece 5. The 2mm thick stainless steel waterproof plate 7 under the through steel is fastened with ST5525 self-tapping screws.

[0021] d. Waterproof layer TPO water-breaking construction. Lay TPO waterproofing membrane 4 according to construction specifications and design requirements. Use hot air welding and other methods to firmly connect the membrane to ensure waterproof effect. Strengthen the joints such as corners, pipe roots, and water outlets, and use additional layers and other methods to improve waterproof performance. During the construction process, timely quality inspections are carried out, such as checking the flatness of the membrane laying and the welding quality, and timely rectification is made if any problems are found.

[0022] e. When installing the roof panel, check whether the installation surface of the aluminum-magnesium-manganese plate is flat and clean, whether there are obvious defects such as deformation, scratches, color difference, whether the plate seams are uniform, and whether the sealant is applied fully and beautifully. Check whether the fixing 2 is firmly installed and whether there is any looseness, whether the bite connection between the plates is tight, and whether there are any gaps or detachment. Carry out a water spray test or check after rain on the roof to check whether there is any leakage on the roof, and focus on checking the waterproof effect of the node parts and plate seams.

[0023] f. Measure, lay out and process the edge panels of the opening. According to the position of the upper manhole in the design drawing, professional surveying personnel will locate and lay out the installation edge lines of the upper manhole and take control measures for the installation edge line positioning.

[0024] g. Install the supporting folds. After positioning and laying out the lines, install the supporting folds on the purlins and fasten them with automatic nails.

[0025] h. Fold the roof panels according to the design drawings and check the folding angle.

[0026] i. Installation of drip fold and reinforcement of steel channel 3. Fix the lower end of the drip fold to the upper manhole frame with automatic nails, with a fixing distance of no more than 250mm. After the lower part is fixed, fix the Z-shaped galvanized support 1 to the roof panel with rivets. The fixing distance between adjacent Z-shaped galvanized support is no more than 200mm.

[0027] The construction method of the flanging and closing structure of the manhole on the roof of the present invention not only greatly improves the waterproof performance compared with the traditional flanging and closing process, but also improves the wind uplift resistance of the roof at the flanging and closing part. The installation effect is beautiful, the construction method is simple, the folding parts are pre-fabricated in the factory and can be installed on site, reducing the construction time and being beneficial to shortening the construction period.

[0028] The present invention has substantial features and remarkable technical progress. The construction method for closing the manhole and grille opening on the aluminum-magnesium-manganese alloy plate roof of the present invention enhances the sealing performance at the manhole and grille opening, effectively preventing rainwater penetration and the wind uplift resistance of the roof at the flanging and closing part. Through flanging and closing treatment, it can be tightly connected to the main structure of the metal roof, can bear a certain load, adapt to the deformation of the roof, is not prone to looseness, ensuring the appearance quality and structural safety, eliminating the potential safety hazards in construction, solving the technical problem of difficult maintenance and being prone to corrosion; and the installation effect is beautiful, the construction method is simple, and the folding parts can be pre-fabricated in advance, which is beneficial to shortening the construction period. The grille flanging and closing can play a certain decorative role and improve the beauty of the roof.

[0029] The construction method for closing the manhole and grille opening on the aluminum-magnesium-manganese alloy plate roof of the present invention is applied in the project of Guangzhou Convention and Exhibition Center. It is simple in construction, easy to operate, firmly installed, has sufficient strength, stiffness and stability, good appearance quality, wide application range, easy to master and easy to popularize. It has been unanimously recognized by the supervision unit and the construction unit, welcomed by the operators, and achieved good economic benefits and social impacts.

[0030] The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various transformations or changes without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention, which should be defined by each claim.

Claims

1. A method for closing the manholes and grille openings on an aluminum-magnesium-manganese plate roof, characterized in that The following steps are involved: a. Prefabricate a number of supporting folds according to the design, wherein the supporting folds are Z-shaped galvanized supporting folds with a thickness of ≥2mm; b. Hole opening measurement and layout According to the column section size and position in the design drawings, the template installation edge is positioned and laid out, and the opening position and roof slats are positioned during the roof structure construction stage; c. Welding angle steel around the opening According to the position determined by measuring and setting out, weld the angle steel to the main structure of the opening to ensure the accuracy of the dimensions of the slats and the opening; carry out the construction of the roof air insulation, sound absorption and insulation layer; d. Waterproof layer water cut-off construction When laying TPO waterproofing membranes, hot air welding is used to firmly connect the waterproofing membranes. Strengthening treatment is performed on the internal and external corners, pipe roots, and downspout nodes, and additional layers are used to improve waterproofing performance. e. Roof panel installation Check whether the installation surface of the aluminum-magnesium-manganese plate is flat and clean, whether there are obvious deformation, scratches, color difference defects, whether the bite joints between the plates are tight, and whether there are gaps or detachment; conduct a water spray test on the roof or check after rain to check whether there is any leakage on the roof; f. Measurement, layout and processing of edge panels for openings According to the position of the upper manhole in the design drawing, locate and lay out the installation edge line of the upper manhole; g. Install support folds After positioning and laying out, install the support folds on the purlins and fasten them with automatic nails; h. Folding roof panels Fold the roof panels according to the design drawings and check the folding angle; i. Installation of drip folding parts Fix the lower end of the drip fold to the upper manhole frame, and fix the supporting fold to the roof panel together with rivets.

2. The closing construction method of manholes and grille openings on the aluminum-magnesium-manganese plate roof according to claim 1 is characterized in that: The angle steel is L50 galvanized angle steel.

3. The closing construction method of manholes and grille openings on the aluminum-magnesium-manganese plate roof according to claim 1 is characterized in that: The spacing between the drip folding members is no greater than 250 mm.

4. The closing construction method of manholes and grille openings on the aluminum-magnesium-manganese plate roof according to claim 1 is characterized in that: The rivet spacing is no greater than 200 mm.

5. The closing construction method of manholes and grille openings on the aluminum-magnesium-manganese plate roof according to claim 1 is characterized in that: The waterproof membrane is a reinforced 1.5 mm thick TPO waterproof membrane.

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