Double-curved-surface metal roof structure and construction method thereof

Abstract

The invention discloses a double-curved-surface metal roof structure which comprises a metal roof structure body, the metal roof structure body is composed of four arc-shaped roof assemblies, the four arc-shaped roof assemblies are connected into a whole, each arc-shaped roof assembly comprises a truss structure, and a roof reticulated shell structure is installed on each truss structure. The roof reticulated shell structure is connected with a roof protection structure through a plurality of purlin supports. The invention further discloses a construction method of the double-curved-surface metal roof structure, and the construction method comprises the following steps: S1, surveying and setting out, adopting a total station and a level gauge to remeasure the steel structure and determine coordinate points; and S2, mounting a purlin support, namely measuring and marking the central point of the purlin support plate according to the construction drawing by adopting a total station, and starting to mount the channel steel purlin support plate. The metal roof is adopted as the roof, three-layer heat preservation and two-layer water prevention are achieved, the aluminum veneer curtain wall is adopted as the outer eave, energy is saved, environment friendliness is achieved, and attractiveness and practicability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hyperbolic metal roof structures, and in particular to a hyperbolic metal roof structure and a construction method thereof. Background Art

[0002] With the development of economic zones and development zones, corresponding buildings or iconic buildings are also built to represent the area.

[0003] At present, the most important thermal insulation and waterproofing treatment during the construction of a hyperbolic metal roof structure is to achieve the effect of waterproofing and thermal insulation of the ceiling; for this purpose, the present application proposes a hyperbolic metal roof structure and a construction method thereof. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and to propose a hyperbolic metal roof structure and a construction method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A hyperbolic metal roof structure, comprising a metal roof structure, the metal roof structure comprising four curved roof components, the four curved roof components being connected as one, the curved roof component comprising a truss structure, a roof grid shell structure being installed on the truss structure, and the roof grid shell structure being connected to a roof protection structure through a plurality of purlin brackets;

[0007] The roof protection structure comprises, from bottom to top, a supporting layer, a vapor barrier layer, a thermal insulation layer, a waterproof layer, a noise reduction layer, and a roof panel, wherein the supporting layer, the vapor barrier layer, the thermal insulation layer, the waterproof layer, the noise reduction layer, and the roof panel are fixedly connected as a whole through an aluminum alloy fixing seat, and the aluminum alloy fixing seat is connected to the purlin support.

[0008] Preferably, the bottom of the aluminum alloy fixing seat is fixedly connected to a C-shaped steel by screws, and the C-shaped steel is fixedly connected to the purlin support by bolts and nuts.

[0009] Preferably, the support layer is an aluminum-zinc-coated corrugated steel sheet, and the thickness of the support layer is 0.6 mm.

[0010] Preferably, the vapor barrier layer is made of a polypropylene vapor barrier film, and the thickness of the vapor barrier layer is 0.18 mm.

[0011] Preferably, the thermal insulation layer is double-layered, and the thickness of the thermal insulation layer is 50 mm.

[0012] Preferably, the waterproof layer is made of thermoplastic polyolefin waterproof coiled material, and the thickness of the waterproof layer is 1.5 mm.

[0013] Preferably, the noise reduction layer is made of glass wool, and the thickness of the noise reduction layer is 50 mm.

[0014] Preferably, the material of the roof panel is fluorocarbon roller-coated aluminum-magnesium-manganese metal plate, and the thickness of the roof panel is 1.0 mm.

[0015] Preferably, the support layer, vapor barrier layer, thermal insulation layer, waterproof layer, noise reduction layer and roof panel are reinforced and connected by screws.

[0016] The invention also discloses a construction method of a hyperbolic metal roof structure, comprising the following steps:

[0017] S1, measurement and setting out, using total station and level to re-measure steel structure and determine coordinate points;

[0018] S2, purlin support installation, use the total station to measure and mark the center point of the purlin support plate according to the construction drawings, and then start installing the channel steel purlin support plate;

[0019] S3, Installation of the support layer. The installation of the base plate should be carried out strictly in accordance with the base plate layout drawing. The starting point position and the arrangement of the longitudinal segment size should be found according to the layout drawing. The installation number of the drawing and the material number should be strictly matched one by one. It is strictly forbidden to exchange the positions of base plates of different lengths;

[0020] S4, installation of vapor barrier layer, the laying direction of vapor barrier film is usually consistent with the long direction of the base plate, the horizontal and vertical overlap length is 100mm, and the overlap part is bonded with waterproof tape;

[0021] S5, Installation of insulation layer. Before the construction of insulation rock wool project, the purlins, steam and moisture barrier and other previous works must be accepted. The first layer of rock wool has a bulk density of 140KG / m 3 When laying out the thermal insulation rock wool, it is required to cover it completely and tightly, with no gaps between the cotton wools.

[0022] S6, installation of waterproof layer. Before laying TPO waterproof membrane, clean the base first to ensure that the base is clean, dry, and free of debris and sharp objects; at the same time, make precise layout to minimize joints. If there are joints, the joints should be staggered at least 100mm, otherwise they must be properly cut;

[0023] S7, installation of noise reduction layer, the thickness of the glass sound-absorbing layer is 50mm, and the glass sound-absorbing cotton should be laid tightly to better reflect its sound-absorbing effect. The joints of the glass sound-absorbing cotton should be butt-jointed, and there should be no gaps when laying. It should be flat, and the edges and corners should also be laid neatly and intact;

[0024] S8, installation of roof panels, install panel supports according to the required angle, and install the roof panels on the panel supports.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The roof of the present invention adopts metal roof, three layers of thermal insulation, two layers of waterproofing, and the outer eaves adopt aluminum single plate curtain wall, which is energy-saving and environmentally friendly, and also beautiful and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a hyperbolic metal roof structure proposed by the present invention;

[0028] Figure 2 A schematic structural diagram of a curved roof assembly in a hyperbolic metal roof structure proposed by the present invention;

[0029] Figure 3 This is a schematic structural diagram of point A in a hyperbolic metal roof structure proposed by the present invention.

[0030] In the figure: 1 metal roof structure, 11 curved roof assembly, 12 roof lattice structure, 13 truss structure, 14 purlin support, 15 C-shaped steel, 16 aluminum alloy fixing seat, 17 supporting layer, 18 vapor barrier layer, 19 thermal insulation layer, 20 waterproof layer, 21 noise reduction layer, 22 roof panel. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Reference Figure 1-3 A hyperbolic metal roof structure and a construction method thereof, comprising a metal roof structure 1, the metal roof structure 1 comprising four curved roof components 11, the four curved roof components 11 being connected as one, the curved roof component 11 comprising a truss structure 13, a roof grid shell structure 12 being installed on the truss structure 13, and the roof grid shell structure 12 being connected to a roof protection structure through a plurality of purlin brackets 14;

[0033] The roof protection structure is composed of a support layer 17, a vapor barrier layer 18, a thermal insulation layer 19, a waterproof layer 20, a noise reduction layer 21, and a roof panel 22 from bottom to top. The support layer 17 is an aluminum-zinc corrugated steel plate with a thickness of 0.6 mm. The vapor barrier layer 18 is made of a polypropylene vapor barrier film with a thickness of 0.18 mm. The thermal insulation layer 19 is a double-layer arrangement with a thickness of 50 mm. The waterproof layer 20 is made of a thermoplastic polyolefin waterproof membrane with a thickness of 1.5 mm. The noise reduction layer 21 is made of glass wool with a thickness of 50 mm. The roof panel 22 is made of a fluorocarbon roller-coated aluminum-magnesium-manganese metal plate with a thickness of 1.0 mm.

[0034] The supporting layer 17, the vapor barrier layer 18, the thermal insulation layer 19, the waterproof layer 20, the noise reduction layer 21, and the roof panel 22 are fixedly connected as a whole through the aluminum alloy fixing seat 16, and the supporting layer 17, the vapor barrier layer 18, the thermal insulation layer 19, the waterproof layer 20, the noise reduction layer 21, and the roof panel 22 are reinforced and connected by screws; the aluminum alloy fixing seat 16 is connected to the purlin support 14, and the bottom of the aluminum alloy fixing seat 16 is fixedly connected to the C-shaped steel 15 by screws, and the C-shaped steel 15 and the purlin support 14 are fixedly connected by bolts and nuts.

[0035] The invention also discloses a construction method of a hyperbolic metal roof structure, comprising the following steps:

[0036] S1, measurement and setting out, using total station and level to re-measure steel structure and determine coordinate points;

[0037] Further explanation: In order to ensure the construction quality of the roof panels, ensure that the roof panel construction is consistent with the design, ensure that the roof installation is beautiful and meets the design requirements, and ensure that the gutter position is smooth, the drainage is unobstructed and there is no water accumulation, so the roof must be equipped with a control elevation point;

[0038] Before measuring the elevation, first find the elevation control point on the ground, use the level double instrument height method to lead an elevation to the lower part of the building, then use the hanging steel ruler to measure, lead an elevation point to the roof as the reference point of the roof control elevation, and then use the reference elevation as the benchmark to measure the elevation control points of the entire roof. The location and number of roof control elevation points depend on the specific environment, so as to facilitate construction and mutual inspection; the roof range controlled by each control elevation should be 50㎡, and the control elevation needs to be repeatedly measured to control the error within the allowable range of 3mm; when there is no need to control the absolute elevation, the height of any point on the roof can also be taken as the control elevation, and the relative elevation of other required position points can be measured; after the roof control elevation measurement is completed, the roof control elevation is used to measure the elevation of the required points on the roof one by one;

[0039] The review of the purlin support requires the height of the axis and the axis direction of the radial line; the axis is mainly controlled by the direction pile point, and the blind area is laid out by the polar coordinate method; when the elevation difference is large, it is adjusted on the purlin support according to the measurement record to digest the error of the structural point to ensure the straightness of the roof; the design department determines the theoretical coordinates and elevation of the projection of the center point of the purlin support on the steel structure based on the model, and the surveyor measures these points and compares them with the theoretical coordinates to determine the adjustment size of our purlin support. If the error of the steel structure is large, the relevant measurement data needs to be provided to the design department to formulate relevant construction plans;

[0040] Roof gutter survey and coordinate measurement: According to the theoretical coordinates (Xn, Yn, Zn) of the gutter and board installation provided by the design, the plane projection position coordinates are first surveyed and laid out. After the plane position is determined, the actual coordinates and elevation of the point are measured using the total station using the polar coordinate method; the three-dimensional coordinates of the point are given to the designer to determine the installation size of the cornice board;

[0041] S2, purlin support installation, use the total station to measure and mark the center point of the purlin support plate according to the construction drawings, and then start installing the channel steel purlin support plate;

[0042] Further explanation: The channel steel purlin support plate adopts 16#b channel steel, L=150mm, the middle lattice shell part is arranged at a spacing of 1350mm along the east-west main arch, the fish lips around are treated with encryption, and the intervals are arranged at a spacing of 1000mm. The center point of the channel steel is aligned with the measurement mark point, and the level of the channel steel is adjusted with a level ruler. It is directly buckled on the tube truss, and the three-level fillet weld is used to weld it firmly with the tube truss. The weld is polished to remove slag, and a layer of epoxy zinc-rich primer and a layer of epoxy micaceous iron intermediate paint are used for rust prevention. Then the vertical channel steel is installed on the vertical channel steel. For the 10# channel steel column, a ruler is used to correct the deviation to ensure that the 10# channel steel column is vertical to the tube truss channel steel. After circumferential welding and slag removal, the weld is treated with anti-rust silver powder paint. Then the purlins are installed. First, the purlin support plate and the purlin are bolted and fixed firmly with M12*35mm galvanized bolts. A total station is used to control the purlin bottom coordinates according to the purlin end control coordinate points on the construction drawings, and the purlin support plate and the channel steel column are spot welded. Secondary adjustment is performed and full welding is started. After full welding is completed, anti-rust silver powder paint is used for anti-corrosion treatment;

[0043] S3, Installation of the support layer. The installation of the base plate should be carried out strictly in accordance with the base plate layout drawing. The starting point position and the arrangement of the longitudinal segment size should be found according to the layout drawing. The installation number of the drawing and the material number should be strictly matched one by one. It is strictly forbidden to exchange the positions of base plates of different lengths;

[0044] Further explanation: The male and female ribs of the bottom plate must be correctly and tightly fastened, and the overlapping position of the bottom plate must be ensured to be on the purlin; the specifications and nailing spacing of the self-tapping screws used in the roof bottom plate should strictly follow the design requirements and cannot be mixed or replaced at will; the nailing of the roof bottom plate should be as even and appropriate as possible while ensuring that the bottom plate is firmly fixed, and avoid excessive nailing force, which will cause the surface of the bottom plate to be uneven; when the bottom plate needs to be cut at the opening or edge, it must be ensured that the cutting is straight and smooth, and there must be no burrs on the cut surface; the iron filings after cutting should be cleaned up in time to avoid rusting and burrs on the roof bottom plate; the iron filings after cutting should;

[0045] S4, installation of vapor barrier layer, the laying direction of vapor barrier film is usually consistent with the long direction of the base plate, the horizontal and vertical overlap length is 100mm, and the overlap part is bonded with waterproof tape;

[0046] Further explanation:

[0047] The overlap of the vapor barrier membrane is strictly sealed according to the design requirements to prevent water vapor from entering the insulation cotton from the overlap position and affecting the insulation effect of the roof;

[0048] During construction, workers should wear soft-soled shoes to avoid breaking the vapor barrier membrane; the management of construction tools should be strengthened, especially the management of construction tools with sharp corners and self-tapping screws, to ensure that the vapor barrier membrane cannot be broken;

[0049] The installation position of the secondary purlin support must be located at the trough of the roof bottom plate and connected to the roof purlin. When encountering a conflict with the roof bottom plate nails, first remove the fixed bottom plate nails and then drive the secondary purlin support structure nails; when the secondary purlin support is nailed and fixed, it must penetrate the roof purlin and be reliably connected to the roof purlin. It is strictly forbidden to nail it empty or crooked. The secondary purlin must be reliably connected and fixed to the secondary purlin support at the bottom;

[0050] S5, Installation of insulation layer. Before the construction of insulation rock wool project, the purlins, steam and moisture barrier and other previous works must be accepted. The first layer of rock wool has a bulk density of 140KG / m 3 When laying out the thermal insulation rock wool, it is required to cover it completely and tightly, with no gaps between the cotton wools.

[0051] Further explanation: The gaps between the secondary purlins and secondary purlins must be filled tightly with rock wool cut to size to prevent the formation of cold bridges; the second layer uses a bulk density of 180KG / m 3 The second layer is overlapped with the first layer with staggered seams, and the overlap is not less than 30mm to better ensure the thermal insulation effect;

[0052] Note:

[0053] 1. Rock wool that has been wetted by rain cannot be used;

[0054] 2. The rock wool boards must be laid flat and close to each other;

[0055] 3. The upper and lower layers of cotton must be overlapped with staggered seams;

[0056] S6, installation of waterproof layer. Before laying TPO waterproof membrane, clean the base first to ensure that the base is clean, dry, and free of debris and sharp objects; at the same time, make precise layout to minimize joints. If there are joints, the joints should be staggered at least 100mm, otherwise they must be properly cut;

[0057] Further explanation: The laying direction during installation is consistent with the laying direction of the roof panel, and the overlapping edges are connected together by hot air welding. The winter construction temperature of TPO waterproof membrane is greater than or equal to -10℃;

[0058] S7, installation of noise reduction layer, the thickness of the glass sound-absorbing layer is 50mm, and the glass sound-absorbing cotton should be laid tightly to better reflect its sound-absorbing effect. The joints of the glass sound-absorbing cotton should be butt-jointed, and there should be no gaps when laying. It should be flat, and the edges and corners should also be laid neatly and intact;

[0059] S8, installation of roof panels, installing panel supports according to the required angle, and installing the roof panels on the panel supports;

[0060] Further explanation: The panel support is the supporting part of the roof panel. It is the load-bearing component that transfers the roof load to the purlin. Its installation quality directly affects the wind resistance of the roof panel. The installation error of the panel support will also affect the longitudinal free expansion and contraction of the aluminum alloy roof panel and the appearance of the roof panel, especially for public buildings such as this project that have high requirements for appearance. Therefore, the installation of the panel support is a key process of this project.

[0061] Use the theodolite to measure the axis to the installed structure as the longitudinal control line for the installation of the panel bracket; the position of the first row of brackets must be checked several times, and the position of the subsequent brackets must be determined with a special ruler; the position of the panel bracket along the length of the board only needs to be guaranteed to be at the center of the top surface of the pad. The number of panel brackets determines the wind resistance of the roof panel, so the number of rows of panel brackets along the length of the board must be strictly arranged according to the design drawings;

[0062] D1. The key control bearing horizontal position deviation, inclination angle, and plane angle during construction:

[0063] A. Plane position

[0064] If the horizontal position deviation of the support exceeds 5 mm (that is, the support is not in a straight line with other supports longitudinally), it will inevitably affect the free expansion and contraction of the plate in the longitudinal direction. When the plate expands due to heat, it may bulge due to excessive resistance at the deviated support, or the plate ribs may be damaged due to long-term friction, causing water leakage.

[0065] B. The inclination angle of the support in the vertical plane

[0066] When the support is tilted at a vertical angle greater than 2°, the plate ribs will be bitten through when biting, causing water leakage. When the support is tilted at a vertical angle greater than 1°, a height difference greater than 1.05 mm will be generated within the support range (60 mm). Friction will be generated when the plate expands and contracts, and the plate ribs will be worn out over a long period of time, causing water leakage.

[0067] C. The support rotates in the horizontal plane

[0068] The torsion angle of the bearing in the horizontal plane is a common problem in bearing installation. The main reason is that when the fixing screws are driven in, the bearing is not pressed tightly or the gap between the scales is too large, causing the bearing to rotate under the action of the torsion force. The construction workers are irresponsible and fail to correct the problem afterwards. This deviation will also cause friction between the plate ribs and cause water leakage. In addition, if an error in the elevation is found during the bearing installation, the height must still be adjusted to ensure that the bearing meets the installation requirements.

[0069] D2. Fixing of panel fixing bracket

[0070] The panel bracket of this project is fixed with self-tapping screws. The self-tapping screws must have anti-aging sealing rings. The speed of the electric drill should be 2000-2500 rpm. Then install the hexagonal sleeve on the electric drill head, insert the screw, align the panel bracket with its installation position, and then drive a self-tapping screw. During installation, the screw and the electric drill must be perpendicular to the upper surface of the purlin. Turn on the electric switch and do not stop halfway. Stop drilling quickly after the screw is in place. At this time, the position of the panel bracket will be slightly offset, and its positioning position must be re-checked before the self-tapping screw on the other side can be driven in.

[0071] D3. Installation accuracy of fixed support

[0072] First, visually check each row of high-strength fixed supports to see if they are in a straight line; if a panel support with a large deviation is found, it must be corrected before the roof panel is installed; if a high-strength fixed support has a large deviation, the roof panel will be installed and bitten, which will affect the free expansion and contraction of the roof panel. In severe cases, the plate ribs will be worn through under the action of temperature; therefore, if a large deviation is found, the deviated support should be corrected until the installation requirements are met;

[0073] After the support is installed, a comprehensive inspection is carried out, and a wire is used to check the position of the plum blossom head of the fixed seat, and timely adjustments are made for misalignment, inconsistent slope, and non-parallelism with the roof panel;

[0074] Further explanation of the processing of the roof panel 22:

[0075] Step 1: Loading of aluminum alloy for roof

[0076] The raw material for the production board is aluminum alloy coil, each coil weighs about 1 ton, so the aluminum coil is hoisted. The aluminum coil must be placed in the designated location of the processing area and cannot be placed randomly; the metal roof panel forming processing equipment can produce smooth vertical edge panels through multiple sets of rolling wheels;

[0077] Step 2: Process flow of metal panel on-site pressing

[0078] Professionally designed computer-controlled automatic forming machine: The container-type forming machine used for metal roof standing seam sewing equipment is an open cold rolling forming machine specially designed by world-class professional and experienced designers for mechanical standing seam systems. This model is used in many countries in the world and has been gradually improved to form the advantages of high degree of automation, automatic length calibration by computer input, reasonable involute roller distribution to reduce pressing stress, and hard chrome plating on the roller surface to make the surface of steel and aluminum plates smooth;

[0079] Debugging of production equipment: Before the machine arrives at the construction site, a full-time staff will test run the machine. The machine can only be shipped after the test run is qualified; after the production equipment arrives at the construction site, the company's professional machine debugging personnel will debug the equipment and ensure that it is in good operating condition;

[0080] Professional production operators and production technology: 3 container-type press machine production operators, who have received professional technical training and have three to five years of experience in the production of vertical lock seam metal roof panels;

[0081] Before formal production every day, two 3000mm products are produced from the first steel coil and subjected to actual buckling installation test using a fixed seat to ensure that the actual buckling of the product and the base meets the requirements;

[0082] Inspection of the first plate: Inspect the first plate produced from each steel coil to confirm whether the dimensions of the product meet the requirements;

[0083] Inspection during the production process: During the production process, pay attention to whether there are scratches on the product surface, whether there are defects in the paint, and check whether the product size has changed. Discard unqualified products in time and record the inspection results;

[0084] Strict product identification: Each bundle of products is affixed with a product packaging sheet, which clearly states the order number, product thickness, color, length, number of pieces, installation location, production date and other information;

[0085] On-site profiling has the same quality assurance system as factory profiling, and on-site profiling can completely avoid the damage to the coating and plating of the corrugated board during transportation, making the durability of the roof panel more guaranteed. On-site profiling can also determine the length of the board according to the span of the roof, completely avoiding longitudinal overlap and minimizing the possibility of water leakage;

[0086] Step 3: Stacking of formed roof panels

[0087] The press unit is debugged and tested. After the various sizes of the profiled sheets meet the design size requirements, batch production is carried out according to the material list. During the roof panel profiling process, every 30 pieces are neatly stacked, placed in the yard and tied securely with ropes every 10 meters or so.

[0088] Step 4: Horizontal Transportation of Metal Roof Panels

[0089] The placement of the press machine should be parallel to the longest direction of the roof. The press board does not need to be rotated on the roof and can be directly transported to the installation site by manual transportation. The specific spacing is 2 meters for one person.

[0090] Step 5: Panel Installation Process

[0091] 1) Paying off the wire

[0092] Under the condition that the installation quality of the fixing base is strictly controlled, it is only necessary to place the panel end positioning line. Generally, the distance of the panel from the gutter is used as the control line. The length of the panel extending into the gutter should be slightly larger than the design to facilitate cutting and installation.

[0093] 2) Position

[0094] The construction workers lift the board to the installation location, align the board ends first, and then press the overlapped edge into the overlapped edge of the previous board; check whether the overlapped edge can be tightly joined. If not, find out the problem and deal with it as soon as possible;

[0095] 3) Biting edge

[0096] After the panel position is adjusted, install the foam plastic seal under the end panel, and then bite the edge; the bitten edge is required to be continuous and flat, without distortion and cracks; when the biting machine moves forward, the overlapped edges must be tightly joined within 1m in front of it; for this project, the key to the quality of the biting edge lies in whether the overlapped edges are tightly joined with strong force during the biting process; the panels in place on the same day must be bitten to ensure that the panels will not be blown or scraped away when the wind blows at night;

[0097] Part 6: Precautions for installing roof panels

[0098] Determination of the reference line: Before installation, the installation quality of the fixing seat should be carefully checked, and before installing the first board, a side line must be drawn along the length of the board according to the positioning axis of the main purlin, and a straight line must be drawn along the bottom of the board on the other side to form a 90° right angle, and the installation should be carried out according to these two reference lines;

[0099] Positioning and installation of the board: lift the board to the installation position, align the board end control line first, then press the overlapped edge into the overlapped edge of the previous board. After positioning, send a dedicated person to check along the length of the board to see whether the aluminum alloy fixing seat is fully pressed into the board ribs and whether the overlap can be tightly joined; if there is any problem, deal with it in time; after the inspection, use a manual edge locker to temporarily fix the cap at intervals along the board rib direction;

[0100] Bite edge of the board: After the panel cover strip is fixed in place, carefully check and adjust the panel, and then use the edge-locking machine to automatically bite the edge; the bite should be continuous and straight, without distortion and cracks, and observe whether the butyl sealant in the cap is compacted;

[0101] In addition, the installation of roof panel accessories is explained:

[0102] In order to better prevent the "backflow" of rainwater on the roof and meet the requirements of overall sealing against wind pressure, a special sealing plug needs to be installed at the ridge end of the roof panel after the roof panel is laid. The outer skin of the sealing plug is the same material as the roof, and it is filled with high-strength water-absorbing sponge. It can instantly absorb moisture when a small amount of rainwater "flows back", achieving a reliable waterproof effect; before installing the end seal of the roof panel, the end of the roof panel should be bent upward to achieve a secondary waterproof effect;

[0103] First point: installation of cornice sealing strip

[0104] When placing the eaves seal, make sure to place the drip sheet as shown below:

[0105] The drip sheet is installed at a distance of 20 mm from the end of the board so that the end of the bottom board can be bent downward;

[0106] Second point: closing the edges

[0107] Since the rib height of the aluminum alloy roof system is beneficial for drainage and waterproofing, the edge closing treatment is the key to roof waterproofing. The edge closing treatment of the aluminum-magnesium-manganese roof panel can be completed by bending parts and welding. At the same time, a cover flashing is set on the bracket to buckle the flange of the hole edge flashing. There is enough space between the hole edge flashing and the skylight or bracket so that the roof panel and the flashing can expand and contract freely, so that it can be waterproof and not connected and fixed to the hole edge flashing, which will not affect the thermal expansion and contraction freedom of the roof panel, and avoid the temperature stress that causes damage to the roof panel or flashing;

[0108] The third point: lightning protection node processing

[0109] During roof construction, a dedicated lightning protection node is set up to connect the metal roof panel with the lower steel structure up and down to form a loop, so that the roof current is transmitted up and down through the metal objects and introduced into the ground;

[0110] Further supplement: Installation of hoisting facade aluminum panels

[0111] B1) Due to the limited on-site storage space, first of all, when in the plate processing plant, accurate planning is made according to the on-site construction sequence, area, installation quantity, and daily processing quantity;

[0112] B2) Before installing the panels, a dedicated person shall check whether the node plates at the installation location are in place and check the arrangement of the hand chain hoists;

[0113] B3) When the plate is lifted to the horizontal installation position by crane, the plate is pulled to the installation position by hand winch;

[0114] B4) When the unit panels are hoisted into place, the total station is used to measure the panel's in and out, left and right, and horizontal positions according to the theoretical coordinates to achieve panel installation accuracy;

[0115] B5) When the measurement is in place, use square tubes to temporarily fix it, and then arrange a group of personnel to install the welding of permanent connectors;

[0116] Steps for installing the skylight glass:

[0117] C1. Main construction methods of skylights

[0118] C11) The steel structure material of the skylight is mainly 80*3mm rectangular galvanized steel pipe and aluminum alloy keel, where the rectangular galvanized steel pipe is welded to the steel structure;

[0119] C12) First, check whether the specifications of the skylight steel structure materials delivered to the site meet the design requirements according to the construction drawings. The visual appearance of the materials is good without deformation, the surface coating is firmly bonded, the color is uniform, the joints are smooth and shiny, and there is no dent in the corner coating. If the steel components are distorted or the coating falls off during transportation, stacking and hoisting, they must be corrected and repaired to meet the design requirements before installation;

[0120] C13) Before installation, the rectangular tubes shall be cut into shape by mechanical or plasma cutting equipment according to the dimensions specified in the design drawings. The cuts must be straight, smooth and free of steel thorns. The cut steel structure materials shall be hoisted to the nearby work surface according to different installation locations and corresponding installations. They shall be placed on the platform strictly according to the positions in the design drawings to ensure that the center lines of the components are on the same horizontal plane with an error of no more than ±10mm. The upper and lower parts shall be leveled. If they are not level, fillers such as angle irons shall be used to level them with an error of no more than ±6mm.

[0121] C14) The construction method of the rectangular steel tube structure of each part of the skylight is: the first step is to weld and install the bottom steel structure rectangular tube on the main purlin of the steel structure; the second step is to weld the skylight column structure rectangular tube on the installed skylight bottom steel structure; the third step is to weld the skylight peripheral structure on the installed column structure; finally, the horizontal skylight hidden frame structure is welded on the installed skylight peripheral structure;

[0122] C15) When welding the rectangular steel pipe structure of each part of the skylight, the current should be appropriate. After the weld is formed, there should be no pores and cracks, no undercuts and weld nodules. The weld size should meet the design requirements, and the weld should be evenly formed, good looking and beautiful.

[0123] C16) The weld needs to be deslagging and polished smooth; the surface paint layer of the steel structure pad is damaged during welding, so the weld and its surroundings should be treated with anti-corrosion after welding. On-site weld touch-up paint is used for anti-corrosion, and the primer is inorganic zinc-rich paint; the middle layer is epoxy micaceous iron paint, and the topcoat is polysiloxane coating;

[0124] C17) The steel structure of each part of the skylight must be welded firmly, with accurate dimensions and the installation quality meeting the design requirements. Therefore, when installing the skylight rectangular steel pipe, the skylight grid size should be marked on the beam first, and the skylight should be installed according to the grid size;

[0125] Additional explanation for the installation of roof gutter drainage system:

[0126] Step 1: Welding of gutter keels

[0127] Before installing the keel, first check whether the steel structure is straight, adjust the steel structure of the water tank, measure and lay out the line according to the depth and width of the gutter, ensure that the gutter is in a straight line, start spot welding the column keel of the gutter (i.e. the height keel), and after spot welding, confirm that it is in the same straight line and then fix it with full welding. Spot weld the gutter keel in sections of several meters, and after welding a straight line, draw a line to check whether it is in the same straight line. After confirming that it is correct, perform full welding. During the welding process, ensure that the weld is uniform, remove excess welding slag and perform anti-corrosion treatment;

[0128] Step 2: Welding of the gutter plate

[0129] The production of eaves gutters is carried out in the factory. According to the design details, the unfolded size of the roof eaves gutters is determined, and then they are formed on a large CNC bending machine. They are uniformly packaged in the form of several meters and sent to the site for installation and welding. The processed gutters are assembled and connected at the roof gutter and placed in place. They are fully welded without any leakage. The number and spacing of the connectors must meet the design requirements and relevant regulations. The on-site welding is in the form of gutter connection, and argon arc welding is used for full welding. The contact is polished to ensure the quality of the appearance and welds.

[0130] Step 3: Installation of Gutter Expansion Joints

[0131] According to the roof drainage method, a certain slope is maintained within a specific range. Expansion joints are installed within a specific distance to prevent the roof gutter from being deformed by the steel structure and causing the gutter board to crack; a section of expansion joints is set every 30m, and the installation of expansion joints must be carried out after the installation of the entire gutter is completed;

[0132] Step 4: Waterproofing the gutter eaves

[0133] The roof panels at the eaves of the gutter are bent down using professional equipment to form an eagle's beak, and foam plugs and aluminum alloy drip sheets are installed at the eaves to prevent water from flowing back into the roof. The TPO waterproof membrane at the upper opening of the gutter is 50mm deep into the gutter side and fixed with galvanized pressing sheets.

[0134] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hyperbolic metal roof structure, comprising a metal roof structure (1), characterized in that: The metal roof structure (1) is composed of four curved roof components (11), the four curved roof components (11) are connected as a whole, the curved roof components (11) include a truss structure (13), a roof grid shell structure (12) is installed on the truss structure (13), and the roof grid shell structure (12) is connected to a roof protection structure via a plurality of purlin brackets (14); The roof protection structure comprises, from bottom to top, a supporting layer (17), a vapor barrier layer (18), a thermal insulation layer (19), a waterproof layer (20), a noise reduction layer (21), and a roof panel (22); the supporting layer (17), the vapor barrier layer (18), the thermal insulation layer (19), the waterproof layer (20), the noise reduction layer (21), and the roof panel (22) are fixedly connected as a whole via an aluminum alloy fixing seat (16); and the aluminum alloy fixing seat (16) is connected to a purlin bracket (14).

2. A hyperbolic metal roof structure according to claim 1, characterized in that: The bottom of the aluminum alloy fixing seat (16) is fixedly connected to a C-shaped steel (15) by means of screws, and the C-shaped steel (15) and the purlin support (14) are fixedly connected by means of bolts and nuts.

3. A hyperbolic metal roof structure according to claim 1, characterized in that: The support layer (17) is an aluminum-zinc-plated corrugated steel plate, and the thickness of the support layer (17) is 0.6 mm.

4. A hyperbolic metal roof structure according to claim 1, characterized in that: The material of the vapor barrier layer (18) is a polypropylene vapor barrier film, and the thickness of the vapor barrier layer (18) is 0.18 mm.

5. The hyperbolic metal roof structure according to claim 1, characterized in that: The thermal insulation layer (19) is double-layered, and the thickness of the thermal insulation layer (19) is 50 mm.

6. A hyperbolic metal roof structure according to claim 1, characterized in that: The material of the waterproof layer (20) is a thermoplastic polyolefin waterproof coiled material, and the thickness of the waterproof layer (20) is 1.5 mm.

7. The hyperbolic metal roof structure according to claim 1, characterized in that: The material of the noise reduction layer (21) is glass wool, and the thickness of the noise reduction layer (21) is 50 mm.

8. The hyperbolic metal roof structure according to claim 1, characterized in that: The material of the roof panel (22) is a fluorocarbon roller-coated aluminum-magnesium-manganese metal plate, and the thickness of the roof panel (22) is 1.0 mm.

9. The hyperbolic metal roof structure according to claim 1, characterized in that: The support layer (17), the vapor barrier layer (18), the thermal insulation layer (19), the waterproof layer (20), the noise reduction layer (21), and the roof panel (22) are reinforced and connected by screws.

10. A construction method for a hyperbolic metal roof structure, characterized in that: The following steps are involved: S1, measurement and setting out, using total station and level to re-measure steel structure and determine coordinate points; S2, installation of purlin support (14), after measuring and marking the center point of the purlin support plate according to the construction drawing using a total station, start installing the channel steel purlin support plate; S3, installation of the supporting layer (17). The installation of the bottom plate should be carried out strictly in accordance with the bottom plate layout drawing. The starting point position and the arrangement of the longitudinal segment size should be found according to the layout drawing. The installation number on the drawing and the material number should be strictly matched one by one. It is strictly forbidden to swap the positions of bottom plates of different lengths. S4, installation of the vapor barrier layer (18), the laying direction of the vapor barrier film is usually consistent with the length direction of the base plate, the horizontal and vertical overlap lengths are 100 mm, and the overlapped parts are bonded with waterproof tape; S5, Installation of insulation layer (19). Before the construction of insulation rock wool project, the purlins, vapor barrier and moisture proof layer and other previous works must pass the acceptance inspection. The first layer of rock wool has a bulk density of 140KG / m 3 When laying out the thermal insulation rock wool, it is required to cover it completely and tightly, with no gaps between the cotton wools. S6, installation of waterproof layer (20), before laying TPO waterproof membrane, first clean the base layer to ensure that the base layer is clean, dry, and free of debris and sharp objects; at the same time, accurately lay out to minimize joints, and stagger the joints at least 100mm, otherwise appropriate cutting is required; S7, installation of the noise reduction layer (21), the thickness of the glass sound-absorbing layer is 50 mm, and the glass sound-absorbing cotton should be laid tightly to better reflect its sound-absorbing effect. The joints of the glass sound-absorbing cotton should be butt-jointed, and there should be no gaps or leaks when laying. The sound-absorbing cotton should be laid flat, and the edges and corners should also be laid neatly and intactly; S8, installation of the roof panel (22), installing the panel support according to the required angle, and installing the roof panel (22) on the panel support.

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