CN115075476A

CN115075476A - Metal roof structure and construction method thereof

Info

Publication number: CN115075476A
Application number: CN202210878945.8A
Authority: CN
Inventors: 张杨; 李建霞; 刘飞; 雷震源; 吴楠; 徐辉; 李伟佳; 班守明; 商晓桐; 徐龙; 赵云威; 王川; 耿超; 冯光明
Original assignee: Beijing Urban Construction North Group Co ltd
Current assignee: Beijing Urban Construction North Group Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-09-20
Anticipated expiration: 2042-07-25
Also published as: CN115075476B

Abstract

The invention discloses a metal roof structure and a construction method thereof, wherein the metal roof structure comprises a first structural layer, a sound absorption supporting layer, a dustproof layer, a sound absorption layer, a second structural layer, a heat preservation supporting layer, a steam barrier, a sound insulation layer, a second waterproof layer and a first waterproof layer which are arranged from bottom to top, so that the metal roof structure has unique shape and appearance, and simultaneously has two layers of waterproof layers, namely the first waterproof layer and the second waterproof layer, one layer of sound insulation, one layer of main heat insulation, one layer of auxiliary heat insulation, namely the sound insulation layer and one layer of sound absorption, so that the metal roof structure has excellent functions of heat preservation, water prevention, sound insulation, sound absorption and the like.

Description

Metal roof structure and construction method thereof

Technical Field

The invention relates to the technical field of metal roof structures, and further relates to a metal roof structure and a construction method thereof.

Background

Along with the development of the times, more buildings adopt steel structures, better use requirements can be met, and the construction period can be shortened, for example, sports stadiums, factory buildings and the like are basically buildings adopting the steel structures, and the metal roof in the buildings adopting the steel structures refers to the metal plate as a roof material.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a metal roof structure and a construction method thereof, and solves the technical problems of water resistance, sound insulation, heat preservation and poor sound absorption of the existing metal roof.

In order to achieve the above object, the present invention provides a metal roof structure, which includes a first structure layer, a first assembly layer, a second structure layer and a second assembly layer from bottom to top, wherein the first assembly layer is connected with the second assembly layer through the second structure layer, so that a cavity is formed between the first assembly layer and the second assembly layer; the first component layer is positioned below the second component layer, and the first component layer is arranged on the first structural layer;

the first assembly layer sequentially comprises a sound absorption supporting layer connected to the first structural layer, a dustproof layer and a sound absorption layer which are paved on the sound absorption supporting layer from bottom to top; the second structural layer penetrates through the dustproof layer and the sound absorption supporting layer through a connecting piece and is connected to the first structural layer;

the second assembly layer sequentially comprises a heat preservation supporting layer connected to the second structural layer, and a steam insulation layer, a sound insulation layer, a second waterproof layer and a first waterproof layer which are sequentially arranged on the heat preservation supporting layer from bottom to top.

In some embodiments, the first structural layer comprises:

the roof purlin fixing device comprises a plurality of main purlins and a plurality of purlin supporting plates, wherein the main purlins are longitudinally arranged above a main steel structure at intervals, the purlin supporting plates are distributed and fixed on the roof main steel structure, and at least two purlin supporting plates are connected to the main steel structure at positions corresponding to the main purlins; the main purline is bolted with the corresponding purline supporting plate; the horizontal height of the main purline is adjustable;

the purline support comprises a plurality of purline support pads and a plurality of secondary purlines, wherein at least one secondary purline is arranged between every two adjacent primary purlines at intervals in a transverse mode, two ends of each secondary purline are connected with the adjacent primary purlines through the purline support respectively, and the secondary purlines are perpendicular to the primary purlines;

the sound absorption supporting layer is fixed on the secondary purline, the dustproof layer is laid on the sound absorption supporting layer, and the sound absorption layer is laid on the dustproof layer.

In some embodiments, the second structural layer comprises:

the fixing piece is positioned on the dustproof layer, part of the fixing piece penetrates through the sound absorption supporting layer and is fixed on the secondary purline, and the other part of the fixing piece is arranged above the sound absorption layer;

the bearing piece is transversely arranged above the sound absorption layer and is connected with the fixing piece, so that a gap is formed between the bearing piece and the sound absorption layer, and a cavity is formed between the upper end surface of the bearing piece and the sound absorption layer;

and/or;

the heat-preservation supporting layer is fixed on the supporting piece;

the steam-isolating layer is laid on the heat-insulating supporting layer;

the heat-insulating layer is laid on the steam-insulating layer;

and the sound insulation layer is paved on the heat insulation layer.

In some embodiments, the support assembly further comprises a mounting piece and a lining purlin, wherein the mounting piece is positioned on the heat-preservation support layer, and the mounting piece is fixed on the bearing piece;

two ends of each lining purlin are respectively connected with the corresponding mounting pieces, the lining purlins are arranged along the whole length of the supporting piece, the lining purlins transversely penetrate through the heat insulation layer, and the lining purlins and the heat insulation layer are arranged at equal height;

and/or;

the sound insulation layer is positioned above the heat insulation layer and the lining purlin;

the second waterproof layer is laid on the sound insulation layer;

the first waterproof layer is fixed on the lining purlin through a support, and the first waterproof layer and the second waterproof layer are arranged in a gap mode.

In some embodiments, the first waterproof layer is composed of a plurality of the vertical locking side plates, and adjacent vertical locking side plates are connected through a clamp;

the fixing piece comprises a n-shaped supporting piece and a buttress, the n-shaped supporting piece penetrates through the heat insulation layer and is connected to the secondary purline, and the buttress is connected to the n-shaped upper end of the n-shaped supporting piece;

the support is a high-strength aluminum alloy coiled material;

the second waterproof layer is a TPO waterproof coiled material;

the sound insulation layer is a cement density board;

the heat-insulating layer is a heat-insulating rock wool board;

the gas barrier layer is a gas barrier film;

the heat-preservation supporting layer is a profiled steel plate;

the sound absorption layer is made of glass sound absorption cotton;

the sound absorption supporting layer is a perforated profiled steel sheet.

In some embodiments, the metal roofing structure further comprises a gutter structure, wherein the gutter structure comprises a gutter supporting layer, a gutter structure layer, a gutter insulating layer, a thermal insulating layer, a gutter second waterproof layer and a gutter first waterproof layer which are sequentially arranged from bottom to top.

In some embodiments, the two sides of the vertical lockage plate are respectively provided with a male rib and a female rib, one side of the male rib of the vertical lockage plate is provided with a groove, and the male rib and the female rib of the adjacent vertical lockage plate are in mechanical snap connection;

the end sides, close to the ridge, of the upright side-locking plates on the two sides of the ridge of the roof are bent upwards, sealing plugs are arranged at the bent positions of the upright side-locking plates bent along the two sides, and the sealing plugs are fixed through ridge sealing pieces; the side folding plates are arranged on the outer sides of the ridges, and flashing plates are connected to the side of the side folding plates, which are positioned at the two ends of the ridge;

the end part of the vertical serging plate close to the gutter is bent downwards, and a lower plug is arranged at the end part close to the vertical serging plate; a water dripping sheet is arranged below the end part of the vertical lockrand plate; and water baffles are arranged at the outmost side of the roof panel or at the two sides of the gutter along the length direction.

In another aspect of the present invention, a construction method of a metal roof structure includes the steps of:

s10, preparation before construction: setting reference level points of each horizontal plane at the ground measuring position, and adjusting the closure difference of the reference level points of each vertical plane to enable each point to be on the same horizontal plane;

retesting the elevation and the axis position of the constructed main steel structure, calculating the fixed elevation and the fixed position of the main purline and the first waterproof layer after modeling according to a construction drawing, measuring the coordinates of each purline mounting point and the roof panel fixing seat control point on the model, and calculating various data of the fixed mounting elevation and the fixed position of the purlines and the roof panel; laying a roof elevation control point, and performing control measurement on purlines, a roof bottom plate and a roof panel fixed seat according to the plate installation layout;

s20, sequentially arranging a first structural layer, a sound absorption supporting layer, a dustproof layer, a sound absorption layer, a second structural layer, a heat preservation supporting layer, a steam insulation layer, a sound insulation layer, a second waterproof layer and a first waterproof layer;

and S30, mounting the gutter, and sequentially mounting a gutter supporting layer, a gutter structural layer, a gutter heat-insulating layer, a gutter second waterproof layer and a gutter first waterproof layer from bottom to top.

In some embodiments, step S20 further includes:

s21, connecting the primary purline and the primary steel structure with a purline supporting plate through bolts to form a whole, connecting and fixing the purline supporting plate and the primary steel structure in a welding mode, and installing two ends of a secondary purline on two adjacent primary purlines through purline supporting lining plates, wherein the secondary purline is perpendicular to the primary purlines;

s22, the sound absorption supporting layer is perpendicular to the secondary purlines and is installed on the secondary purlines through self-tapping screws;

s23, laying the dustproof layer and the sound absorption layer in the same direction as the sound absorption supporting layer and along the direction from the gutter to the ridge 140;

s24, firstly, combining and welding the buttresses and the sectional steel to form the fixing pieces, then, fixing the fixing pieces on the secondary purlins by penetrating the dust-proof layer and the sound-absorbing supporting layer through self-tapping screws, turning the cuts of the sound-absorbing layer outwards, and welding the bearing pieces on the buttresses;

s25, laying the heat-preservation supporting layer on the supporting piece and fixing the heat-preservation supporting layer along the whole length of the supporting piece;

s26, arranging mounting pieces at intervals, arranging lining purlins along the full length of the supporting piece, and densely paving the heat insulation layer between the lining purlins at equal elevations;

s27, paving the sound insulation layer on the heat insulation layer and the lining purlin;

s28, mechanically fixing the second waterproof layer, and welding the second waterproof layer by hot air and paving the second waterproof layer on the sound insulation layer; the first waterproof layer is fixed through the support, the support penetrates through the second waterproof layer through the self-tapping screw, the sound insulation layer is fixed to the lining purlin to the top, and the gap between the supports is arranged and installed and then is subjected to waterproof treatment.

In some embodiments, in step S20, when the primary purlins and the secondary purlins are installed, the coordinates of the control nodes need to be corrected, and the installation direction of the purlin pallets is adjustable;

when the first waterproof layer is installed, the cornice is parallel to the roof, a datum line is defined at the edge of the main steel frame, and the first waterproof layer is laid on the datum line; when the purlin supporting plate is positioned at the position of the main beam in the installation process, rechecking and adjusting the verticality of the purlin supporting plate; the first waterproof layer and the edge folding plate are installed according to requirements;

before installing the main purline, the secondary purline, the sound absorption supporting layer and the first waterproof layer, the upper plane control net and the elevation control points of the main steel structure need to be guided and measured, and the distance between the plane control nets is not more than 30 meters; positioning and measuring the positions of the gutter, the main purline and the secondary purline;

before purlin construction, re-measuring the coordinates of the main structure, setting control points, performing multi-point paying-off, and adjusting the heights of the main purlin and the secondary purlin by using purlin supporting plates and purlin supporting pads;

in the installation process of the sound absorption supporting layers, the lap joint length between two longitudinally adjacent sound absorption supporting layers is not less than 100mm, a wave crest is mutually lapped between two transversely adjacent first sound absorption supporting layers, and the straightness of two ends and the middle of each first waterproof layer and the parallelism of the whole board need to be checked during installation;

the heat insulation cotton must be laid flat, folded and tightly seamed.

Compared with the prior art, the metal roof structure and the construction method thereof provided by the invention have the following beneficial effects:

1. according to the invention, through the first structural layer, the sound absorption supporting layer, the dustproof layer, the sound absorption layer, the second structural layer, the heat preservation supporting layer, the steam insulation layer, the sound insulation layer, the second waterproof layer and the first waterproof layer which are arranged from bottom to top, the metal roof structure has excellent functions of two layers of water resistance, namely the first waterproof layer and the second waterproof layer, one layer of sound insulation, one layer of main heat insulation, one layer of auxiliary heat insulation, one layer of sound absorption and the like, and the requirements of the project as an ice and snow sports competition training field are completely met on the function levels of water resistance, sound insulation, heat insulation, sound absorption and the like.

2. The engineering roof has unique shape, and the stainless steel gutter distributed on the whole roof system not only reflects the appearance of the whole building, but also has the key problem of roof waterproofing; due to the fact that the standing seam serging roof system is adopted, through the structural design of the standing seam serging roof system and the arrangement of the full-length plate type, the waterproof performance of the system is superior. However, according to the experience of conventional engineering, when the positions such as the edge, the ridge 140 and the like are involved, the positions are also places which are easy to cause water leakage, and enough waterproof measures need to be made to ensure the leakage-proof performance of the whole roof

3. According to the invention, the weldable performance of the roof plate material is utilized, and aluminum welding is adopted for the gap parts such as construction connecting seams and the like and the water leakage parts, so that the whole roof forms a closed whole; the leakage resistance between the roof panels is achieved through the characteristics of the roof panels, such as the exposed installation characteristic of the non-penetrating screws and the water retaining performance of the anti-capillary grooves of the roof panels; and aiming at the position of the through hole, the weldability of an aluminum alloy material can be utilized to directly weld the flashing board with the roof board, so that the flashing board and the roof waterproof board are integrated into a whole to improve the overall waterproof performance.

4. The wind resistance of the metal roof is always the key point of the metal roof engineering, the structural wind load is checked in the deepening design stage, and the purline is encrypted at the part with larger wind load bearing area such as the cornice according to the calculation result; the edge of the roof waterproof plate is provided with an edge locking to prevent weather such as strong wind; during the serging, manual preliminary serging is firstly carried out to ensure that the aluminum alloy fixing seat is completely coincided with the roof panel, and then an electric serging machine is adopted to carry out automatic occlusion, thereby further ensuring the wind resistance of the roof waterproof board.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic view of the structure of the present invention after mounting a sound-absorbing supporting layer;

FIG. 2 is a schematic view of the structure of FIG. 1 after the dust-proof layer and the sound absorption layer are installed

FIG. 3 is a schematic view of the second structural layer of FIG. 2 after installation;

FIG. 4 is a schematic structural view of FIG. 3 after installation of a heat-insulating support layer;

FIG. 5 is a schematic structural view of FIG. 4 after installation of the vapor barrier, insulation and support assembly;

FIG. 6 is a schematic view of the acoustical layer of FIG. 5 after installation;

fig. 7 is a schematic view of the structure of fig. 6 after installation of a second waterproof layer;

fig. 8 is a schematic view of the structure of fig. 7 after installation of the first waterproof layer;

FIG. 9 is a schematic view of the structure mounted at the ridge;

FIG. 10 is a schematic view of a gutter installation configuration;

fig. 11 is a partial structural view of the first structural layer.

The reference numbers illustrate:

10. a first waterproof layer; 11. a support; 20. a second waterproof layer; 30. a sound insulating layer; 40. a heat-insulating layer; 50. a vapor barrier; 60. a support assembly; 61. a mounting member; 62. lining purlin; 70. a heat preservation supporting layer; 80. a second structural layer; 81. a fixing member; 811. n-shaped support 812, buttress; 82. a support member; 90. a sound absorbing layer; 100. a dust-proof layer; 110. a sound-absorbing supporting layer; 111. self-tapping screw; 120. a first structural layer; 121. a primary purlin; 122. a secondary purlin; 123. a purlin support; 130. gutter; 131. a gutter first waterproof layer; 132. a gutter second waterproof layer; 133. a thermal insulation layer; 134. a gutter insulating layer; 135. a gutter supporting layer; 136. a lower plug, 137 and a water dropping sheet; 140. a roof ridge; 141. sealing plugs, 142 and ridge sealing elements; 143. a flashing plate; 144. edge folding plates; 150. a primary steel structure.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" means not only "only one of this but also a case of" more than one ".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Referring to fig. 1 to 10, the present invention discloses a metal roof structure, which includes a first structure layer 120, a first assembly layer, a second structure layer 80 and a second assembly layer from bottom to top, wherein the first assembly layer and the second assembly layer are connected by the second structure layer 80, so that a cavity is formed between the first assembly layer and the second assembly layer; and the first component layer is located below the second component layer, the first component layer is mounted on the first structural layer 120;

the first assembly layer sequentially comprises a sound absorption supporting layer 110 connected on the first structural layer 120, a dustproof layer 100 laid on the sound absorption supporting layer 110 and a sound absorption layer 90 from bottom to top; the second structural layer 80 is connected to the first structural layer 120 by a connector penetrating through the dust-proof layer 100 and the sound-absorbing supporting layer 110;

the second component layer sequentially comprises a heat preservation supporting layer 70 connected to the second structural layer 80, and a steam insulation layer 50, a sound insulation layer 30, a second waterproof layer 20 and a first waterproof layer 10 which are sequentially arranged on the heat preservation supporting layer 70 from bottom to top.

In specific implementation, the first structural layer 120 is a main purline 121 hot-dip galvanized rectangular pipe, and the dust-proof layer 100 is non-woven fabric; the sound absorption layer 90 is 100-thick glass fiber sound absorption cotton with the volume weight of 32kg/m 3; second structural layer 80 includes several types of supports 811, buttress 812, and buttress 82; the heat preservation supporting layer 70 is a profiled steel plate with the thickness of 0.8mm and the rib height of 15 mm; the mounting part 61 is a Z-shaped support part, and the steam barrier layer 50 is a steam barrier film with the thickness of 0.25 mm; the heat-insulating layer 40 is heat-insulating rock wool with the thickness of 150mm, and the volume weight is 140kg/m 3; the sound insulation layer 30 is a cement density board with the thickness of 6 mm to 8 mm; the second waterproof layer 20 is a 1.5mm tpo waterproof roll; the support 11 is an H80 high-strength aluminum alloy support 11; the connecting piece is a high-strength clamp.

Wherein the sound-absorbing support layer 110 is a perforated profiled steel sheet with the thickness of 0.5mm and the rib height of 15 mm; the profiled steel sheet has multiple processing procedures, complex process and higher technical content; the steel coil is subjected to the following processes: punching, baking finish and profiling.

Punching: according to the sound-absorbing support layer 110, namely the profiled steel sheet, the punching is carried out on the steel coil, the two sides of the profiled steel sheet are not symmetrical, so that the position of the punching area on the steel coil needs to be determined according to the expansion size of the plate type in order to ensure the symmetry of hole positions after profiling, and the characteristic of certain extension in the profiling process needs to be considered. The punching quality mainly controls the flatness and burrs, and the inspection standard is the enterprise standard of a manufacturer.

Profiling: the computer numerical control profiling equipment is adopted for one-step processing and forming, and because the two sides of the forming plate are provided with the large and the small edges, the positions of the punching area on the steel coil are asymmetric, so that the accurate position of the punching area after forming can be ensured only by paying attention to the correct feeding direction during profiling;

the first waterproof layer 10 is an aluminum-magnesium-manganese roof board, namely, the roof board is composed of a plurality of 65/430-shaped aluminum-magnesium-manganese vertical lockrand boards with the thickness of 0.9mm, the transversely adjacent vertical lockrand boards are connected through connecting pieces, namely clamps, the roof board belongs to a lockrand occlusion system, and the surface of the roof board is in a hidden installation design without perforation and puncture, so that the whole roof system forms weather resistance. The support 11 for fixing the roof panel is fixed with the lining purlin 62 by adopting an aluminum alloy fixing seat, and then the roof panel is buckled with the quincuncial head of the aluminum support 11 by using an edge locking machine. In addition, an anti-corrosion gasket with the thickness of 5mm is additionally arranged below the fixed seat and is fixed by screws, so that the electrochemical reaction generated between an aluminum component and steel can be prevented, and the cold bridge effect can be effectively controlled.

The roof board adopts special overlocking machinery to connect the roof board and the bracket into a waterproof and wind-resistant whole, and the whole roof board system can freely slide and stretch under the temperature change without penetrating the roof board by screws, thereby avoiding the phenomenon of roof leakage caused by the malposition of an occlusion seam between the roof board and the roof board caused by the expansion caused by heat and the contraction caused by cold of the roof board due to the temperature change;

two rows of steel wire ropes are arranged between the cornice and the ground in the transporting process of the roof panel, the width distance between the steel wire ropes is 500mm, an elevator is installed on the steel wire ropes, the elevator is connected with the steel wire ropes through pulleys, the elevator is connected with the steel wire ropes through soft ropes, the panel is placed on the elevator during panel transporting, the panel is pulled by manpower to slide upwards without a sliding rope, the roof panel is transported to the roof, the roof panel continues to slide forwards through a support until reaching the top of the roof after being transported to the top of the roof, and the area range set near the cornice is stacked after being transported to the top of the roof.

The metal roof structure is determined by a building three-dimensional control original point: because the engineering shape is a smooth surface body, unique three-dimensional size control origin coordinates (0, 0, 0) must be determined on a main body structure, a roof, a curtain wall and the like to be used as the basis of the size control of each specialty to ensure the realization of the overall shape;

secondly, the design control is deepened: namely, three-dimensional modeling of the outer skin and curve separation of the plate surface are carried out according to the shape and elevation control dimension requirements required by the design construction drawing by taking the three-dimensional dimension control origin coordinates (0, 0, 0) as a reference. Determining three-dimensional control points and surfaces of the surface of the roof as coordinate basis for roof engineering construction measurement, material blanking and construction control;

and (3) checking and rechecking the model of the main steel structure 150: as the working surface of the roofing project is of a steel structure specialty, the roofing skin model must be matched with the main steel structure 150 model, and the change of the modeling size of the exterior finishing surface due to the error of the main steel structure 150 model is prevented. Adjusting the size and the skin model of the main steel structure 150 in time;

fourthly, construction measurement control: according to the skin three-dimensional control point, a method for controlling elevation from outside to inside is established, and purlines and roof boards are constructed by determining control points on the main steel structure 150 through a total station. The method for constructing the roof in parallel upwards by taking the primary steel structure 150 as the size reference is avoided, and the influence of the installation error of the primary steel structure 150 on the surface shape is prevented.

Through the corresponding measures, the metal roof is in an integral slope shape, and the roof has the smoothness of lines, so that the metal roof has integral smoothness and attractiveness of appearance.

The invention has unique roof modeling, and the stainless steel gutter distributes the whole roof system to reflect the appearance of the whole building, and the waterproof of the roof is a key problem; due to the fact that the standing seam serging roof system is adopted, through the structural design of the standing seam serging roof system and the arrangement of the full-length plate type, the waterproof performance of the system is superior. However, according to the experience of conventional engineering, when the positions of the edge, the ridge 140 and the like are involved, the positions are also places which are easy to cause water leakage, and enough waterproof measures need to be made to ensure the leakage-proof performance of the whole roof.

According to the invention, the weldable performance of the roof plate material is utilized, and aluminum welding is adopted for gap parts such as construction connecting seams and the like and water leakage parts, so that the whole roof forms a closed whole; the leakage resistance between the roof panels is achieved through the characteristics of the roof panels, such as the exposed installation characteristic of the non-penetrating screws and the water retaining performance of the anti-capillary grooves of the roof panels; and aiming at the position of the through hole, the weldability of an aluminum alloy material can be utilized to directly weld the flashing board 143 with the roof board, so that the flashing board and the roof waterproof board, namely the first waterproof layer, are integrated into a whole to improve the overall waterproof performance.

The wind resistance of the metal roof is always the key point of the metal roof engineering, the structural wind load is checked in the deepening design stage, and the purline is encrypted at the part with larger wind load bearing area such as the cornice according to the calculation result; the roof waterproof board, namely the first waterproof layer 10 is provided with the overlock at the same time, so that weather such as strong wind and the like is prevented; during the serging, manual preliminary serging is firstly carried out to ensure that the aluminum alloy fixing seat is completely coincided with the roof panel, and then an electric serging machine is adopted to carry out automatic occlusion, thereby further ensuring the wind resistance of the roof waterproof board.

In one embodiment, as shown in fig. 11, the first structural layer 120 includes: a plurality of primary purlins 121, a plurality of purlin pallets, a plurality of secondary purlins 122, and a plurality of purlin pallet susceptors 123; a plurality of main purlins 121 are longitudinally arranged above the main steel structure 150 at intervals, a plurality of purlin supporting plates are distributed and fixed on the roof main steel structure 150, and at least two purlin supporting plates are connected to the main steel structure 150 at positions corresponding to the main purlins 121; the main purlins 121 are bolted with the corresponding purlin support plates; the horizontal height of the main purline 121 is adjustable; at least one secondary purlin 122 is arranged between every two adjacent primary purlins 121 at intervals in a transverse mode, two ends of each secondary purlin 122 are connected with the adjacent primary purlins 121 through purlin supports respectively, and the secondary purlins 122 are perpendicular to the primary purlins 121;

referring again to fig. 1, the sound absorbing support layer 110 is fixed to the secondary purlins 122, the dust-proof layer 100 is laid on the sound absorbing support layer 110, and the sound absorbing layer 90 is laid on the dust-proof layer 100;

referring again to fig. 2, second structural layer 80 includes: the fixing piece 81 and the supporting piece 82, the supporting piece 82 is a hot galvanizing rectangular pipe.

The fixing piece 81 is positioned on the dust-proof layer 100, part of the fixing piece 81 penetrates through the sound-absorbing layer 90 and is fixed on the secondary purline 122, and the other part of the fixing piece 81 is positioned above the sound-absorbing layer 90; the fixing piece 81 comprises a plurality of types of supports 811 and buttresses 812, the plurality of types of supports 811 penetrate through the heat insulation layer 40 and are connected to the secondary purlins 122, and the buttresses 812 are connected to the upper ends of the plurality of types of supports 811;

the supporting piece 82 is transversely arranged above the sound absorption layer 90, and the supporting piece 82 is connected with the fixing piece 81, so that a gap is formed between the supporting piece 82 and the sound absorption layer 90, and a cavity is formed between the upper end surface of the supporting piece 82 and the sound absorption layer 90;

referring again to fig. 3-4, the insulating support layer 70 is secured to a support 82; the vapor barrier layer 50 is laid on the heat insulation support layer 70; the heat-insulation support layer is characterized by further comprising a support assembly 60, wherein the support assembly 60 comprises a mounting piece 61 and a lining purlin 62, the mounting piece 61 is located on the heat-insulation support layer 70, and the mounting piece 61 is fixed on the supporting piece 82;

two ends of each lining purlin 62 are respectively connected with the corresponding mounting pieces 61, the lining purlins 62 are arranged along the whole length of the supporting piece 82, the lining purlins 62 transversely penetrate through the heat insulation layer 40, and the lining purlins 62 and the heat insulation layer 40 are arranged at the same height;

referring again to fig. 6-8, sound insulation layer 30 is positioned over insulation layer 40 and purlin 62; the second waterproof layer 20 is laid on the sound insulation layer 30; the first waterproof layer 10 is fixed on the lining purlin 62 through a support 11, and the first waterproof layer 10 and the second waterproof layer 20 are arranged in a gap;

referring to fig. 8-10, in one embodiment, the two sides of the vertical lockedge plate are respectively provided with a male rib and a female rib, one side of the male rib of the vertical lockedge plate is provided with a groove, and the male rib and the female rib of the adjacent vertical lockedge plate are in mechanical snap connection;

the metal roof structures on the metal roof on both sides of the ridge 140 are arranged in a downward inclination manner;

the end sides, close to the ridge 140, of the upright serging plates on the two sides of the roof ridge 140 are bent upwards, a sealing plug 141 is arranged at the bent position of the upright serging plates bent along the two sides, and the sealing plug 141 is fixed on the sealing plug 141 through a ridge sealing piece 142; the edge closing plate 143 is arranged outside the ridge 140, and the flashing plates 143 are connected to the edge closing plate 144 at the two ends of the ridge 140;

the end part of the vertical lockrand plate close to the gutter 130 is bent downwards, and a lower plug 136 is arranged at the end part close to the vertical lockrand plate; a water dripping sheet 137 is arranged below the end part of the vertical lockrand plate; and water baffles are arranged at the outmost side of the roof panel or at the two sides of the gutter along the length direction.

The invention also provides a metal roof construction method, which comprises the following steps:

retesting the elevation and the axis position of the constructed roof steel structure, modeling according to a construction drawing, then counting the fixed elevation and the fixed position of the main purline 121 and the first waterproof layer 10, measuring the coordinates of each purline mounting point and the roof panel fixing seat control point on the model, and counting various data of the fixed mounting elevation and the fixed position of the purlines and the roof panels; and laying roof elevation control points, and performing control measurement on the purlines, the roof bottom plate and the roof panel fixed seats according to the plate installation layout.

In order to guarantee the quality of installation, accurate measurement location is the prerequisite of guaranteeing construction quality and effect, and measurement location scope includes: purlins, stainless steel gutters; a cornice framework; the stainless steel support is a purlin supporting plate. The invention has the characteristics of higher structure, more complexity, serious cross operation and the like, and has large measurement and positioning difficulty. The method specifically comprises the steps of controlling net guiding measurement, gutter positioning measurement and purlin positioning line measurement.

(1) Control net lead test

1) Plane control net leading and measuring

According to this engineering construction subregion, draw at each construction district and survey criss-cross plane control net to roofing steel construction upper surface, during the construction, constructor surveys the control line of putting main purlin 121 and inferior purlin 122, bottom plate, roof boarding and gutter support according to the horizontal control net in proper order. The distance between the plane control nets does not exceed 30 meters.

2) Elevation control point guiding and measuring

The elevation control points provided by an owner (supervision) unit or a general packet unit are utilized, the control elevation of the building is guided to the upper surface of the steel structure of the roof by a steel ruler, and the density of the elevation control points needs to be noticed during guiding, so that the measurement and the control of the elevation of the roof are facilitated. Accurately detecting the point sites.

(2) Gutter positioning measurement

After the axis and the elevation control network points are guided and measured to the roof, the roof is positioned and measured, the position line of the roof gutter is determined according to the plane control network, during measurement, a steel ruler is used for measuring the position control points of each gutter 130 through the axis control network, at least three points are measured by each gutter 130, and each point is measured through two control lines of the gutter 130, so that the position error of the gutter can be checked.

(3) Purlin locating line measurement

The position of the main purline 121 is arranged at a truss joint, the plane position can be positioned without being used, the position of the truss joint is used as a standard, during construction, the main purline positioning main work is to position the height of the main purline support 11, before construction, the actual elevation of each joint of the truss is measured by a total station, and compared with the design elevation, an error value is determined, a negative value is higher than the design elevation, a positive value is lower than the design elevation, and the error of the truss joint is adjusted when a truss support plate or a main purline support plate is constructed.

The purlin layer board is adding man-hour, adjusts the purlin layer board height according to measured data, and the truss error is the positive value, and the purlin layer board is heightened, and the truss error is the negative value, and the purlin layer board height reduces. After adjustment, the mounting height line of the main purline 121 is measured on the purline supporting plate, and the purline supporting plate is marked by using a pen-point pen to serve as a height positioning line for mounting the main purline 121.

The measuring and positioning of the secondary purlins 122 firstly positions the plane positions of the secondary purlins 122, the measuring method comprises the steps of measuring and positioning according to a plane control network, determining elevation compensation values of the secondary purlins 122 in a computer three-dimensional graph after positioning, measuring angle values of the secondary purlins 122 and the main purlins 121 at the same time, and measuring and placing the data on the main purlins 121 as construction basis.

1) Secondary purlin 122 mounting angle

The angle between the same main purline 121 and the main purline 121 is variable when the same main purline 121 is not perpendicular to the main purline 122 last time, and adjustment is paid attention to during installation.

2) Roof board measuring and positioning

The roof plate measuring and positioning principle is related to roof row plates, firstly, the roof is positioned to penetrate into a gutter position line, then, a ridge 140 positioning line is positioned, and the distance between the two lines is the plate length.

S20, sequentially arranging a first structural layer 120, a sound absorption supporting layer 110, a dustproof layer 100, a sound absorption layer 90, a second structural layer 80, a heat preservation supporting layer 70, a steam insulation layer 50, a sound insulation layer 30, a second waterproof layer 20 and a first waterproof layer 10;

and S30, mounting the gutter, and sequentially mounting a gutter supporting layer 135, a gutter structural layer, a gutter insulating layer 134, a heat insulating layer 133, a gutter second waterproof layer 132 and a gutter first waterproof layer 131 from bottom to top.

The main process in the construction process of the gutter 130 comprises the following steps: the gutter keel is arranged, namely a gutter supporting layer 135, a gutter structural layer, a gutter heat-insulating layer 134, a heat-insulating layer 133, a gutter second waterproof layer 132 and a gutter first waterproof layer 131; the gutter structure layer comprises a gutter bottom plate and a side sealing plate, a structural layer, a gutter plate, a gutter baffle, a lower plug 136 and a water dropping sheet 137.

Because the gutter made of stainless steel plates is adopted, the bearing is mainly realized by a gutter support at the lower part, namely a gutter support layer 135, when the gutter support is installed, the distance between the top surface of the gutter support and the top surfaces of purlins at two sides is required to be the same as the depth of the gutter, namely, the elevation of the gutter support ensures that each section of gutter can be completely contacted with the support, so that the stress of the gutter support is uniform. The gutter support is a galvanized square steel pipe and is welded on the main structure, and the width of the gutter support needs to be slightly 10mm wider than the outer diameter of the gutter during installation by adjusting the width of the gutter support. So that the gutter can be better positioned.

The cutting opening is polished to be clean before the stainless steel plate gutter, namely a gutter structure layer is butted, the butt joint gap cannot exceed 1mm during the butt joint, the butt joint length is about 10mm, spot welding is carried out at intervals of 10cm before welding, and the rear part can be welded after the welding requirement is met. The type of the welding rod is determined according to the parent metal. And forming the welding seam in one step. In order to accelerate the installation speed of the gutter, two to three sections of gutters can be spliced into a whole on the ground and then hung to the installation position to be installed in place, so that the butt joint quality of the gutters can be improved, and the working efficiency can be greatly improved. After each gutter is installed, the appearance of the welding seam is carefully checked, whether the welding seam has air holes which cannot be found by naked eyes is checked in rainy days, and if the air holes are found to be seeped, the welding seam is polished by a polishing machine and is welded again. And (3) a gutter expansion joint manufacturing method: namely, an expansion joint is arranged at every 30 meters of the gutter. The gutter plate at the position of the expansion joint is reserved with 50mm of the joint, and the metal plates at two ends of the rubber belt of the expansion joint are welded with the gutter in an argon arc mode.

After a section of gutter 130 is installed, a plurality of holes are drilled in the middle of the designed water falling hole, so that the influence on construction caused by water stored in the gutter 130 is avoided. After the plate corresponding to the gutter 130 is installed, the water falling hole must be opened in time. The rainwater downpipe is finished by a drainage construction team, and the formal downpipe is required to be drilled by a hollow drill.

After all the working procedures are finished, uniform trimming treatment is carried out to remove burrs and unevenness on the sheared edge.

After the final completion, the gutter 130 is cleaned to remove the waste on the roof during construction, especially the position of the gutter inlet, so as to ensure that no silt is accumulated and the running water is smooth.

After the gutter 130 is installed, a corresponding water storage test should be performed.

The roof gutter adopts a special tool to bend the end of the roof plate downwards so as to facilitate drainage, and the lower plug 136 is arranged at the plate end so as to seal the roof and prevent rainwater from flowing back; the water dripping sheet 137 is arranged to play a role of dripping and preventing water, the roof panels at the gutter are connected into a whole to enhance the wind resistance, the water baffle is arranged on the outermost side and used for wind prevention and water prevention, and the water baffle is a sealing plate on two sides along the gutter direction.

Wherein, step S20 further includes:

s21, connecting the primary purlins 121 and the primary steel structure 150 with purlin support plates through bolts to form a whole, connecting and fixing the purlin support plates and the primary steel structure 150 in a welding mode, installing two ends of secondary purlins 122 on two adjacent primary purlins 121 through purlin support lining plates, and enabling the secondary purlins 122 to be perpendicular to the primary purlins 121;

in the construction process of the main purline 121 and the secondary purline 122, the installation positions and the heights of the main purline 121 and the secondary purline 122 are determined, the purline supporting plate and the purline supporting and supporting tray 123 are positioned and set off, the bolts are installed, the main purline 121 and the secondary purline 122 are installed, and the main purline 122 and the secondary purline 122 are subjected to top arc operation, re-checking measurement, elevation and installation gradient adjustment and fixation.

The purlin supporting plate and the purlin supporting plate 123 positioning method comprises the following steps:

a. and throwing an elevation positioning point according to the off-site ground measurement datum point to determine a reference coordinate.

b. And determining the positions of the purlin supporting plates and the purlin supporting brackets 123, the positioning lines of the purlin supporting plates and the purlin supporting brackets 123 in two mutually perpendicular directions and the coordinate values of the key point purlin supporting plates and the purlin supporting brackets 123 according to the height positioning points and the axis.

c. And obtaining theoretical coordinate values of the main purlin supporting plates and the purlin supporting plate 123 according to the coordinate position of the base point of the three-dimensional modeling of the computer, and comparing the theoretical coordinate values with the actually measured coordinate values to obtain a deviation value.

d. Before the purlin supporting plate is fully welded, the axial displacement, the levelness and the mid-span verticality of the purlin supporting plate are checked, and if variation exists, correction is needed; and simultaneously, after the full welding of the purlin supporting plate is finished, derusting the welding line and brushing an anticorrosive paint.

After the purlin supporting plate is positioned, the included angle between the purlin supporting plate and the surface of the original roof steel structure main purlin 121 is guaranteed to be 90 +/-1 degrees, and the position deviation is within 5 mm.

In the welding process, a measure for reducing deformation is taken, firstly, symmetrical spot welding is carried out, the angle of the purlin supporting plate is checked, welding is carried out after the purlin supporting plate is qualified, the angle is corrected when the purlin supporting plate is unqualified, and the spot welding needs to be firm.

The diameter of the welding rod is 3.2mm, and the model of the welding rod is E4303.

The current is proper during welding, air holes and cracks can not appear after a welding seam is formed, undercut and welding beading can not appear, the size of the welding seam meets the design requirement, the welding ripples are uniform, and the formed welding seam is attractive.

The elevation can be adjusted through the height of the purlin supporting plate and the elliptical hole in the purlin supporting plate by adjusting the height difference of the main purlin 121, and the purlin supporting plates with different lengths can be processed for adjustment. The deviation measurement of steel construction in time inserts measurement work when the steel construction is under construction, guarantees the timeliness and the construction period of processing of purlin layer board and purlin support setoff 123. According to the measurement method of the main purline 121 and the secondary purline 122, the summary of measurement data and the deepening of the purline supporting plate and the purline supporting plate 123 are carried out in time. The height of the secondary purlins 122 can be adjusted by the vertical length of the purlin backer 123.

In order to ensure the installation quality of the main purline 121 and the secondary purline 122, before the construction of the main purline 121 and the secondary purline 122, the coordinates of a steel structure of a main structure, namely a roof, are retested, and for excessive deformation, the correction is timely carried out, so that the construction quality of the main purline 121 and the secondary purline 122 is ensured; and arranging control points, performing multi-point paying-off, and adjusting the height by using purlin supporting plates to ensure the accuracy of paying-off.

S22, enabling the sound absorption supporting layer 110 to be perpendicular to the secondary purlins 122, and enabling the sound absorption supporting layer 110 to be installed on the secondary purlins 122 through self-tapping screws 111;

when the sound-absorbing support layer 110 is installed, the installation axis of the sound-absorbing support layer 110 is determined by using a gable cornice, namely a parapet skeleton outside an outer wall, as a reference line. The installation process comprises the following steps: installation preparation, installation operation platform setting, retesting of steel structures, building heights and the like before installation, transportation (transportation to installation operation surface) of the sound absorption supporting layer 110, namely the roof bottom plate, reference line arrangement, installation of the first plate, rechecking → subsequent installation of the roof bottom plate, and self-checking, renovation and inspection after the installation is finished.

The shape and various performances of the whole roof are directly affected by the installation condition of the floor of the roof, namely the sound absorption supporting layer 110. Therefore, the roof bottom plate needs to retest the elevation of the steel structure main purline 121 and the secondary purline 122 and each key part which are installed on the construction working face before installation, and places which are found to be inconsistent with the design should be timely communicated with steel structure units and supervision and management to be locally adjusted, so that the smooth installation of the bottom plate is ensured.

Before the sound-absorbing supporting layer 110, namely the bottom plate, is installed, a positioning plate sideline is firstly set out, and a positioning plate is installed. And sequentially installing the bottom plates according to the positioning plates, and placing one composite wire on every ten rows of plates. And (4) rechecking the installation size deviation of the bottom plate and adjusting to avoid generating larger accumulated errors.

Before the bottom plate is installed, bottom plate installation sidelines are popped up on the main purlines 121 and the secondary purlines 122, then the bottom plate is installed, the bottom plate installation sidelines take the longitudinal axis or the transverse axis as a reference, two points on the bottom plate sidelines are measured out along the longitudinal axis or the transverse axis, the two point connecting lines are the bottom plate installation sidelines, the bottom plate installation sidelines are checked after the bottom plate installation sidelines are measured and released, the bottom plate installation is carried out after the requirements are met, the bottom plate installation sidelines are accurate in requirements, and therefore the fact that the bottom plate ribs are straight is guaranteed.

And measuring and placing a bottom plate installation rechecking line every 10 plates, adjusting the error of the bottom plate in time through the bottom plate installation rechecking line during installation, adjusting the error of the bottom plate through 10 plates in the next installation process when the error of each 10 plates of the bottom plate is not more than 10mm, and if the error exceeds 10mm, reworking and reinstalling the installed bottom plate. After the bottom plate is installed, the longitudinal and transverse axes of the roof are required to be sprung on the bottom plate so as to be used as a control line in the subsequent process installation.

In order to ensure the installation quality of the sound absorption supporting layer 110, namely the bottom plate, the bottom plate and the secondary purlin 123 are fixedly connected through the stainless steel self-tapping screws 111, the self-tapping screws 111 must be firmly and reliably installed during installation, the self-tapping screws are arranged on a line, and the exposed screw caps naturally become straight lines when being straight lines and arc lines when being curved, so that smooth transition is realized. The longitudinal lapping length between the bottom plates is not less than 100mm, and a wave peak is lapped with each other in the transverse direction, if the plates are mutually connected to trigger a large gap, a phi 4 aluminum rivet is needed to be properly fastened. During installation, attention is paid to the overlapping of the rib parts of the bottom plates and the alignment of the rib parts of the bottom plates so as to ensure the mutual communication between the bottom plates. Each 8 boards should be installed and checked and adjusted appropriately as needed. After a section of area is installed, a section check is performed by measuring the width of the fixed base plate once at the top and once at the bottom to ensure that no movement or fanning occurs. After the profiled bottom plate is installed, no residue and dirt exist on the plate surface. The joints of the plates are tight, the connection and rubbing are smooth and straight, the anchoring is reliable, the longitudinal and transverse joints are linear, and the plate surface is flat and clean.

When the first bottom plate is installed, the first bottom plate is installed according to a measured control line, and the straightness of the two ends and the middle of the plate and the parallelism of the whole plate are checked at any time during plate installation, so that the whole plate is prevented from being fanned. The bottom plate should mark the fixed position of self tapping with the marker pen before the installation on panel according to the purlin interval, prevents to appear that the 111 intervals of self-tapping nail differ, or the problem of the unfixed on purlin of self-tapping nail 111. The plate can be adjusted in time by checking the longitudinal and transverse overlapping length and the joint condition in the installation process, and the wrong position of the tapping screw 111 needs to be repaired in time when the plate is fixed. When the bottom plate is drilled, holes are drilled according to the actual size, if no wrap angle is arranged at the drilled position, a scissors gun or manual scissors are used for drilling, and a toothless saw is not used for cutting. When the bottom plate is installed, reliable anchoring, smooth installation, tight contact of plate seams and clean plate surfaces are ensured. The bottom plate is guaranteed not to be damaged in the follow-up construction process after the bottom plate is installed, and the method is an important link. The cutting machine cannot move freely on the cutting machine, the bottom surface of the cutting machine is not suitable to be in direct contact with the plate surface in the field cutting process, and a three-in-one plate is padded.

S23, laying the dust-proof layer 100 and the sound absorption layer 90 in the same direction as the sound absorption support layer 110 and in the direction from the gutter to the ridge 140;

s24, firstly, combining and welding the buttress 812 and the steel bars to form the fixing piece 81, then, fixing the fixing piece 81 on the secondary purline 122 by penetrating through the non-woven fabric and the sound absorption supporting layer 110 through the self-tapping screw 111, turning the cut of the sound absorption layer 90 outwards, welding the supporting piece 82 on the buttress 812, and forming a cavity between the upper end surface of the supporting piece 82 and the sound absorption layer 90;

s25, laying the heat-preservation supporting layer 70 on the supporting piece 82 and fixing the heat-preservation supporting layer 70 along the length of the supporting piece 82;

s26, arranging the mounting pieces 61 at intervals, arranging the lining purlins 62 along the whole length of the supporting pieces 82, densely paving the heat insulation layers 40 between the lining purlins 62, and making the heat insulation layers 40 and the lining purlins 62 have the same height;

when the heat preservation layer 40 is laid, namely the laying mode is designed before the heat preservation rock wool is laid, the heat preservation rock wool is called as heat preservation cotton for short hereinafter, the size is calculated according to the laying mode, the cutting edge straight line error is not more than 5mm, the splicing seam is not more than 2mm, and the seams between the plates are bonded by special adhesive tapes.

The paving is carried out from one side of the roof to the other side in sequence, lap joints of two adjacent heat-preservation cottons are staggered, and riveting and fixing are carried out on the end parts and the edges by adopting special tools.

The key of the construction of the heat insulation material is water resistance, in order to prevent the heat insulation material from being exposed for a long time, the construction must be strictly organized and intensively constructed, the exposure time of the heat insulation material is reduced as much as possible, simultaneously, a rainproof tarpaulin is prepared, and the uncovered heat insulation material is temporarily covered in time after the construction is finished so as to prevent the heat insulation material from being wetted by rain at night. During laying, the laying must be tight, and the joints are overlapped to prevent cold bridges from being formed.

The installation of the heat insulation cotton especially focuses on ensuring the construction quality of corner parts, such as the intersection of a roof and a skylight, the side of a gable wall, the outside of flashing, the edge vertical face plugging and the like, which are parts easy to ignore in construction, and cold air just invades into a room from the parts to influence the heat insulation effect of the whole roof, so that the heat insulation cotton is a key control part in the construction process.

In order to ensure the installation quality, the heat insulation cotton must be paved and folded; the joints are tight, the heat insulation cotton must be laid and cut according to the roof modeling, and the joints must be closely laid according to the standard requirements so as to meet the design requirements of the system; the paving direction is along the direction of being perpendicular to the long side of profiled sheet to pave tightly. In order to ensure the construction quality of the project, the wind-proof and rain-proof protection measures are strictly made, and the construction is forbidden in rainy or windy weather. In order to prevent the installed heat insulation layer 40 from being exposed outside for a long time, a detailed construction plan must be strictly organized, a detailed construction plan must be formulated, construction is centralized, too many cotton materials are prevented from being stacked on the roof for a long time, the exposure time of the heat insulation layer 40 is shortened as much as possible, the waterproof cloth is prepared at the same time, the uncovered heat insulation cotton is temporarily covered to prevent the heat insulation cotton from being wetted by rain after construction is finished every day, the humidity and the appearance quality of the materials should be strictly checked before the heat insulation cotton is laid, the heat insulation cotton is prevented from being laid and installed when being wetted and damaged, and uniform scrapping treatment is required. The cotton installation that keeps warm must in time be fixed, and the nail that keeps warm is arranged and must be executed according to the standard requirement is strict. And measures such as wind prevention, rain prevention, snow prevention and the like are taken, and the use function of the structural layer after installation is ensured. The thickness of the waterproof heat-insulating structure layer is measured at any time, and the waterproof and heat-insulating effects of the roof are guaranteed. Each procedure of the roof is required to be executed strictly according to the design requirement, and the requirement of the number of the construction layers must be met. The waterproof and heat-preservation construction regulations required by design and specification are strictly executed, and the use requirements of the roof are ensured to be met.

S27, the sound insulation layer 30 is laid on the heat insulation layer 40 and the lining purlin 62;

s28, mechanically fixing the second waterproof layer 20, and welding by hot air and laying the waterproof layer on the sound insulation layer 30; the first waterproof layer 10 is fixed through a support 11, the support 11 penetrates through the second waterproof layer 20 through a self-tapping screw 111, a sound insulation layer 30 is fixed to the lining purlin 62 to the top, and after the gap between the supports 11 is arranged and installed, the supports 11 are subjected to waterproof treatment.

A theodolite is adopted to guide the axis to the upper surface of the purline to be used as a longitudinal control line for mounting the support 11;

when the roof boarding device is installed, a self-tapping screw is firstly driven, then the support 11 is corrected once, the deviation is adjusted, and the installation direction of the end head of the support 11 is required to be consistent with the direction of the roof boarding. And after the correction is finished, driving a second screw to fix the second screw. After the installation is finished, the fastening degree of the screw is controlled well, and sinking or floating nails are avoided; after installation, each row of holders 11 is first visually inspected to see if they are in line.

The first waterproof layer 10 is installed, namely the roof panel is installed, and the main steps comprise preparation work, paying off, transportation in-place installation, occlusion joint, occlusion, panel edge trimming, edge closing flashing installation, hole waterproof treatment, roof cleaning, self-checking, rectification and inspection.

Preparation work: before the roof panel is installed, the area needing to be installed needs to be concealed and checked, foreign matters, particularly combustible matters, cannot be arranged below the installation area. If foreign matters exist, the panel can be installed after the foreign matters are rectified and rechecked.

Paying off: the plane control of the roof panels is generally completed by positioning the roof panels with T-shaped supports 11 below the roof panels. The fixed support 11 is paid off according to the size of the surface layer plate, and the distance between the finished noise reduction nets is 350mm, and the fixed support is fixed on the leveling steel plate by using self-plugging rivets. The mounting of the fixed support 11 must be straight. After the roof panel fixing support 11 is installed to be qualified, only a panel end positioning line needs to be arranged. The distance between the plate and the edge of the drainage ditch is generally taken as a control line, and the length of the plate extending out of the edge of the drainage ditch is preferably slightly greater than the design so as to facilitate trimming.

Transporting and installing in place: the constructor lifts the plate to the installation position, aligns the plate end control line when in place, then presses the overlapping edge into the overlapping edge of the previous plate by force, and finally checks whether the overlapping edge is tightly jointed.

Occlusion: after the position of the roof panel is adjusted, the special electric serging machine is used for serging and occluding. The bitten edge is required to be continuous and flat, and no distortion or crack can occur. In the process of occlusion crawling of the undercutting machine, the overlap edge needs to be tightly jointed by forcedly clamping within 1m in front of the undercutting machine, which is also the key point of the quality of mechanical undercutting. The roof panels in place on the same day must be undercut to avoid the panels being blown or scraped away when the wind comes.

Trimming board edges: after the roof panel is installed, the edges of the panel at the edges need to be trimmed so as to ensure that the edges of the roof panel are neat and attractive. The length of the roof panel extending into the gutter is preferably not less than 100 mm.

Edge-closing waterproof installation and opening treatment: the edge-closing waterproof installation and the opening treatment are the key points of roof engineering waterproofing. Before edge folding and flashing installation, the upper end of the roof panel needs to be flanged. The model of the component needs to be carefully checked before the edge closing and flashing installation, and the component cannot be used randomly. The edge-closing waterproof lap joint needs to be continuous, and the lap joint direction needs to strictly comply with the lap joint level. All holes on the roof must be subjected to waterproof treatment according to design nodes, particularly holes caused by various pipelines and human factors, or closed by adopting waterproof coiled materials or adopting a welding mode.

Clearing, reporting and checking: after the installation of the metal roof panel is completed, the roof must be thoroughly cleaned, and the existence of unclosed holes and leakage points is checked, so that the timely report and check of report and check conditions are achieved.

The roof system, namely the aluminum alloy upright overlock roof system, is very good in waterproof effect because the ribs with different sizes on the two sides of the roof panel are buckled together and then connected together in a mechanical meshing mode, and the roof system also plays a role in breathing because the grooves for preventing rainwater from capillary action are arranged on one sides of the male ribs of the roof panel, and can play a role in detailed leakage of rainwater. The installation direction of the roof panel is the down-slope direction, rainwater flows from a high position to a low position on the same panel, enters the gutter and is drained out of the roof through siphoning, and therefore the rainwater on the roof can naturally and smoothly flow out and cannot seep into the roof panel.

Roof ridge 140 department adopts roof ridge 140 hem instrument to bend upward the end of roof boarding and prevents the rainwater inflow, sets up end cap under the roof ridge 140 and prevents the rainwater refluence and play sealed effect, sets up aluminium alloy roof ridge sealing member 142 waterproof and anti-wind, and the outside sets up roof and receives the sideboard flashing windproof and waterproof.

After the roof panel rib is buckled into the fixed seat, temporary fixation is not carried out in real time by using a tile clamp during surface construction, the roof can be popped out by the respective fixed seat before stress overlocking exists in the panel due to the buckling of the plate, final inspection on the installation quality of the roof panel is not carried out before overlocking, and the panel rib can be locked and broken.

The correct method is that after the board is fastened, each fixed seat is checked to see whether the board rib is completely fastened or not, and if the board rib is not fastened or is fastened again, the board rib is fastened again.

The next board of installation after the complete lock is good, several backs of installation, carry out the preliminary serging with manual splint ware, mainly carry out the preliminary locking to fixing base department and guarantee that the last support of fixing base is accomplished and is detained the board rib, if when pressing from both sides in advance, fixing base installation accuracy is not enough, and the lock is not gone up or the lower lock of fixing base mounted position is gone into the board rib and just needs in time to adjust, prevents that electronic serging back board rib from bursting or locking empty.

After the manual serging is finished, when the electric serging is carried out, a serging operator carries a rubber hammer along with the manual operation, the plate rib, particularly the fixed seat part, is knocked in front of the electric serging machine, so that the fixed effect of the plate is rechecked, and if the fixed seat is not well buckled, the electric serging machine needs to be stopped and adjusted again. When serging, a serging person needs to use a pedal to locate the plate rib in front of the serging machine.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A metal roofing structure comprising, from bottom to top, a first structural layer, a first assembly layer, a second structural layer, and a second assembly layer, the first assembly layer being connected to the second assembly layer by the second structural layer such that a cavity is formed between the first and second assembly layers; and a first component layer is located below the second component layer, the first component layer being mounted on the first structural layer;

the first assembly layer sequentially comprises a sound absorption supporting layer connected to the first structural layer, a dustproof layer and a sound absorption layer, wherein the dustproof layer and the sound absorption layer are paved on the sound absorption supporting layer from bottom to top; the second structural layer penetrates through the dustproof layer and the sound absorption supporting layer through a connecting piece and is connected to the first structural layer;

2. The metal roofing structure of claim 1 wherein the first structural layer comprises:

the roof purlin fixing device comprises a plurality of main purlins and a plurality of purlin supporting plates, wherein the main purlins are longitudinally arranged above a main steel structure at intervals, the purlin supporting plates are distributed and fixed on a roof main steel structure, and at least two purlin supporting plates are connected to the main steel structure at positions corresponding to the main purlins; the main purline is bolted with the corresponding purline supporting plate; the horizontal height of the main purline is adjustable;

the purlin support comprises a plurality of purlin support pads and a plurality of secondary purlins, wherein at least one secondary purlin is arranged between every two adjacent primary purlins at intervals in a transverse mode, two ends of each secondary purlin are connected with the adjacent primary purlins through the purlin support respectively, and the secondary purlins are perpendicular to the primary purlins;

3. Metal roofing structure according to claim 2,

the second structural layer includes:

and/or;

the heat-preservation supporting layer is fixed on the supporting piece;

the steam-isolating layer is laid on the heat-insulating supporting layer;

the heat-insulating layer is laid on the steam-insulating layer;

and the sound insulation layer is paved on the heat insulation layer.

4. Metal roofing structure according to claim 3,

the supporting component comprises a mounting piece and a lining purlin, the mounting piece is positioned on the heat-insulation supporting layer, and the mounting piece is fixed on the supporting piece;

and/or;

the second waterproof layer is laid on the sound insulation layer;

5. Metal roofing structure according to claim 4,

the first waterproof layer is composed of a plurality of vertical lockage boards, and adjacent vertical lockage boards are connected through a clamp;

the support is a high-strength aluminum alloy coiled material;

the second waterproof layer is a TPO waterproof coiled material;

the sound insulation layer is a cement density board;

the heat-insulating layer is a heat-insulating rock wool board;

the steam barrier layer is a steam barrier film;

the heat-preservation supporting layer is a profiled steel plate;

the sound absorption layer is made of glass sound absorption cotton;

the sound absorption supporting layer is a perforated profiled steel sheet.

6. Metal roofing structure according to any one of claims 2 to 5,

the metal roof structure further comprises a gutter structure, wherein the gutter structure comprises a gutter supporting layer, a gutter structure layer, a gutter heat insulation layer, a gutter second waterproof layer and a gutter first waterproof layer which are sequentially arranged from bottom to top.

7. Metal roofing structure according to claim 6,

the two sides of the vertical lockrand plate are respectively provided with a male rib and a female rib, one side of the male rib of the vertical lockrand plate is provided with a groove, and the male rib and the female rib of the adjacent vertical lockrand plate are mechanically connected in an occluded manner;

the metal roof structures on the two sides of the ridge on the metal roof are arranged in a downward inclined mode;

8. A construction method of a metal roof structure is characterized in that: the method comprises the following steps:

s20, sequentially arranging a first structural layer, a sound absorption supporting layer, a dust prevention layer, a sound absorption layer, a second structural layer, a heat preservation supporting layer, a steam insulation layer, a sound insulation layer, a second waterproof layer and a first waterproof layer;

9. The method of constructing a metal roofing structure according to claim 8, wherein: wherein step S20 further includes:

10. A method of constructing a metal roofing structure according to claim 9, wherein:

in step S20, when the primary purlin and the secondary purlin are installed, the coordinates of the control nodes need to be corrected, and the installation direction of the purlin pallet is adjustable;

in the installation process of the sound absorption supporting layers, the lapping length between two longitudinally adjacent sound absorption supporting layers is not less than 100mm, a wave crest is lapped between two transversely adjacent first sound absorption supporting layers, and the straightness of two ends and the middle of each first waterproof layer and the parallelism of the whole board need to be checked during installation;

paving heat preservation cotton; the edges of the heat preservation cotton are folded and the seams of the adjacent heat preservation cotton are tight.