CN115075476B

CN115075476B - Metal roof structure and construction method thereof

Info

Publication number: CN115075476B
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: 2023-05-23
Anticipated expiration: 2042-07-25
Also published as: CN115075476A

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 dust-proof layer, a sound absorption layer, a second structural layer, a heat insulation supporting layer, a vapor barrier layer, 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 modeling and appearance, and simultaneously has excellent functions of two layers of waterproof layers, namely a first waterproof layer and a second waterproof layer, one layer of sound insulation, one layer of main heat insulation, one layer of auxiliary heat insulation, namely a sound insulation layer and one layer of sound absorption, and the metal roof structure has good heat insulation, waterproof, sound insulation, sound absorption and other excellent functions.

Description

Metal roof structure and construction method thereof

Technical Field

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

Background

With the development of the age, more buildings adopt steel structures, so that not only can better use requirements be met, but also construction periods can be shortened, such as sports venues, factories and the like are basically all buildings adopting steel structures, metal roofs in the buildings adopting the steel structures are made of metal plates as roof materials, at present, the metal roofs arranged on the roofs are formed by sequentially connecting a plurality of panels, and for ice and snow sports venues, various requirements are required to be met, and the existing metal roof structures cannot achieve excellent functions of water resistance, sound insulation, heat preservation, sound absorption and the like.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a metal roof structure and a construction method thereof, which solve 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 roofing structure, including a first structural layer, a first component layer, a second structural layer and a second component layer, which are arranged from top to bottom, wherein the first component layer and the second component layer are connected through the second structural layer, so that a cavity is formed between the first component layer and the second component layer; and a first component layer is positioned 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 dust-proof layer and a sound absorption layer, wherein the dust-proof 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 the connecting piece to be connected to the first structural layer;

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

In some embodiments, the first structural layer comprises:

the purlin supporting plates are fixedly distributed on the main steel structure of the roof, 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 purlin bracket plate; the horizontal height of the main purline is adjustable;

the purlin supporting brackets and the purlins are arranged at intervals between two adjacent main purlins, at least one secondary purlin is arranged between two adjacent main purlins at intervals, two ends of each secondary purlin are connected with the adjacent main purlins through the purlin supporting brackets respectively, and the secondary purlins are perpendicular to the main purlins;

the sound absorption supporting layer is fixed on the secondary purline, the dust-proof layer is laid on the sound absorption supporting layer, and the sound absorption layer is laid on the dust-proof layer.

In some embodiments, the second structural layer comprises:

the fixing piece is positioned on the dust-proof layer, and part of the fixing piece penetrates through the sound-absorbing supporting layer and is fixed on the secondary purline, and the other part of the fixing piece is arranged above the sound-absorbing layer;

The bearing piece is transversely arranged above the sound absorption layer and 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 face of the bearing piece and the sound absorption layer;

and/or;

the heat-insulating supporting layer is fixed on the bearing piece;

the steam barrier layer is paved on the heat insulation supporting layer;

the heat insulation layer is paved on the steam barrier layer;

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

In some embodiments, the support assembly further comprises a mounting member and a purlin, the mounting member is positioned on the insulation support layer, and the mounting member is fixed on the bearing member;

the two ends of the lining purlin are respectively connected with the corresponding mounting pieces, the lining purlin is arranged along the supporting piece in a through length mode, the lining purlin transversely penetrates through the heat insulation layer, and the lining purlin and the heat insulation layer are arranged at the same height;

and/or;

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

the second waterproof layer is paved 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.

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

the fixing piece comprises a plurality of support pieces and a buttress, the plurality of support pieces penetrate through the heat insulation layer and are connected to the secondary purline, and the buttress is connected to the upper end of the plurality of support pieces;

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 preservation layer is a heat preservation rock wool board;

the gas barrier layer is a gas barrier film;

the heat-insulating supporting layer is a profiled steel sheet;

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

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

In some embodiments, the metal roof structure further comprises a gutter structure, wherein the gutter structure comprises a gutter supporting layer, a gutter structural 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.

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

The vertical edge locking plates at two sides of the roof ridge are bent upwards near the end sides of the ridge, and sealing plugs are arranged at the bent positions of the vertical edge locking plates bent at two sides, and the sealing plugs are fixed through ridge sealing pieces; a trimming plate is arranged outside the ridge, and flashing plates are connected to the trimming plate at two end sides of the ridge;

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

In another aspect of the invention, a method of constructing a metal roofing structure includes the steps of:

s10, preparation before construction: the reference level points of all the levels are confidential at the ground test place, and the closing difference adjustment is carried out on the reference level points of all the vertical faces so that all the points are on the same level;

re-measuring the elevation and the axis position of the main steel structure after construction, counting the elevation and the position fixed by the main purline and the first waterproof layer after modeling according to a construction drawing, measuring the coordinates of each purline mounting point and a roof board fixing seat control point on a model, and counting various data of the mounting elevation and the position fixed by the purline and the roof board; laying roof elevation control points, and carrying out control measurement of purlines, roof bottom plates and roof plate seats according to the plate installation layout;

S20, a first structural layer, a sound absorption supporting layer, a dust-proof layer, a sound absorption layer, a second structural layer, a heat preservation supporting layer, a steam barrier layer, a sound insulation layer, a second waterproof layer and a first waterproof layer are sequentially arranged;

s30, installing the gutter, namely sequentially installing a gutter supporting layer, a gutter structural layer, a gutter heat preservation layer, a heat insulation 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 a main purline and a main steel structure to form a whole through bolts, connecting and fixing a purline supporting plate and the main steel structure through a welding mode, installing two ends of a secondary purline on two adjacent main purlines through purline supporting lining plates, and vertically arranging the secondary purline and the main purline;

s22, the sound-absorbing supporting layer is perpendicular to the secondary purline and is arranged on the secondary purline through self-tapping nails;

s23, paving the dust-proof layer and the sound-absorbing layer in the same direction as the sound-absorbing supporting layer, and paving the dust-proof layer and the sound-absorbing layer in the direction from the gutter to the ridge 140;

s24, firstly combining and welding the buttress and a plurality of section steels to form the fixing piece, then adopting self-tapping nails to penetrate through the dust-proof layer and the sound-absorbing supporting layer to be fixed on the secondary purline, and enabling the shear port of the sound-absorbing layer to be turned outwards, and welding the supporting piece on the buttress;

S25, paving a heat-preserving supporting layer on the bearing piece and fixing the heat-preserving supporting layer along the whole length of the bearing piece;

s26, arranging mounting pieces in a clearance way, arranging lining purlins along the whole length of the supporting piece, and tightly paving heat insulation layers between the lining purlins, wherein the heat insulation layers are equal in elevation with the lining purlins;

s27, a sound insulation layer is paved on the heat insulation layer and the lining purlin;

s28, mechanically fixing the second waterproof layer, welding with hot air and spreading on the sound insulation layer; the first waterproof layer is fixed through the support, the support penetrates through the second waterproof layer through the tapping screw, the sound insulation layer is fixed on the lining purlin to the upper portion, and after the gap between the supports is arranged and installed, waterproof treatment is carried out on the support.

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

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

the method comprises the steps that an upper plane control network of a main steel structure and the guiding and measuring of elevation control points are required to be carried out before a main purline, a secondary purline, a sound absorption supporting layer and a first waterproof layer are installed, and the distance between the plane control networks is not more than 30 m; positioning and measuring positions of the gutter, the main purline and the secondary purline;

Before purline construction, retesting the main structure coordinates, setting control points, carrying out multipoint paying off, and adjusting and installing the heights of the main purlines and the secondary purlines by utilizing purline supporting plates and purline supporting plates;

in the installation process of the sound-absorbing support layers, the lap joint length between two adjacent sound-absorbing support layers in the longitudinal direction is not less than 100mm, two adjacent first sound-absorbing support layers in the transverse direction are mutually overlapped with one wave crest, and the straightness between the two ends and the middle of the first waterproof layer and the parallelism of the whole board are required to be checked during installation;

the heat-insulating cotton must be laid flat, folded and tightly joined.

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

1. the metal roof structure has the excellent functions of two layers of water proofing, namely the first water proofing layer and the second water proofing 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 completely meets the requirements of the project as an ice and snow sports competition training field on the functional grades of water proofing, sound insulation, heat insulation, sound absorption and the like.

2. The engineering roof has unique modeling, and the stainless steel gutter distribution of the whole roof system not only reflects the appearance of the whole building, but also has the key problem of roof water resistance; because of the vertical seam-locked roof system, the waterproof performance of the system is superior through the self structural design and the arrangement of the through long plates. However, according to the experience of the conventional engineering, when the positions such as the edge folding and the ridge 140 are involved, the positions which are easy to cause water leakage are needed to be made with enough waterproof measures to ensure the leak-proof performance of the whole roof

3. According to the invention, by utilizing the weldability of the roof board material, aluminum welding is adopted for constructing the gap parts such as the connecting joints and the parts easy to leak water, so that the whole roof forms a closed whole; the leakage resistance between roof boards is achieved through the characteristics of the roof boards, such as the non-penetrating screw exposed installation characteristic and the water retaining performance of the anti-capillary grooves of the roof boards; and the weldability of the aluminum alloy material can be utilized at the perforation position, so that the flashing board is directly welded with the roof board, and the flashing board and the roof waterproof board are integrated to improve the overall waterproof performance.

4. The wind resistance of the metal roof is the key point of the metal roof engineering, the structural wind load is checked and calculated in the deepening design stage, and the purline encryption treatment is carried out on the parts with larger wind load bearing capacity of the edge areas such as cornice and the like according to the calculation result; the roof waterproof board is installed and locked, so that weather such as strong wind is prevented; when in serging, manual pre-serging is performed firstly to ensure that the aluminum alloy fixing seat is completely matched with the roof board, and then an electric serging machine is adopted for automatic engagement, so that the wind resistance of the roof waterproof board is further ensured.

Drawings

The above features, technical features, advantages and implementation of the present invention will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.

FIG. 1 is a schematic view of the structure of the present invention after installation of a sound absorbing support layer;

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

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

FIG. 4 is a schematic view of the structure of FIG. 3 after installation of a thermal insulation support layer;

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

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

FIG. 7 is a schematic view of the structure of FIG. 6 after the second waterproof layer is installed;

fig. 8 is a schematic structural view of the first waterproof layer installed in fig. 7;

FIG. 9 is a schematic view of the construction of a roof ridge installation;

FIG. 10 is a schematic view of a gutter mounting structure;

fig. 11 is a schematic view of a portion of the first structural layer.

Reference numerals illustrate:

10. a first waterproof layer; 11. a support; 20. a second waterproof layer; 30. a sound insulation layer; 40. a heat preservation layer; 50. a vapor barrier layer; 60. a support assembly; 61. a mounting member; 62. lining purlin; 70. a heat-insulating supporting layer; 80. a second structural layer; 81. a fixing member; 811. several types of supports, 812, buttresses; 82. a support; 90. a sound absorbing layer; 100. a dust-proof layer; 110. a sound absorbing support layer; 111. self-tapping nails; 120. a first structural layer; 121. a main purlin; 122. secondary purlin; 123. purlin supporting and supporting; 130. a gutter; 131. the gutter first waterproof layer; 132. the gutter second waterproof layer; 133. a thermal insulation layer; 134. a gutter heat-insulating layer; 135. a gutter support layer; 136. a lower plug, 137, and a drip piece; 140. a ridge; 141. sealing plugs, 142, ridge seals; 143. flashing board; 144. a trimming plate; 150. and a main 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 explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

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

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-10, the present invention discloses a metal roofing structure comprising a first structural layer 120, a first component layer, a second structural layer 80 and a second component layer from bottom to top, the first component layer and the second component layer being connected by the second structural layer 80 such that a cavity is formed between the first component layer and the second component layer; and the first component layer is located below the second component layer, and the first component layer is mounted on the first structural layer 120;

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

the second assembly layer sequentially comprises a heat insulation supporting layer 70 connected to the second structural layer 80 from bottom to top, and a vapor barrier layer 50, a sound insulation layer 30, a second waterproof layer 20 and a first waterproof layer 10 sequentially arranged on the heat insulation supporting layer 70.

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 a non-woven fabric; the sound-absorbing layer 90 is 100-thickness glass fiber sound-absorbing cotton, and the volume weight is 32kg/m3; the second structural layer 80 includes several supports 811, buttresses 812, and braces 82; the heat-insulating supporting layer 70 is a profiled steel sheet with the thickness of 0.8mm and the rib height of 15 mm; the mounting member 61 is a Z-shaped support member and the vapor barrier 50 is a 0.25mm thick vapor barrier film; the heat preservation layer 40 is heat preservation rock wool with the thickness of 150mm and the volume weight of 140kg/m3; the sound insulation layer 30 is a cement density board with the thickness of 6+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 supporting layer 110 is a perforated profiled steel sheet with a thickness of 0.5mm and a rib height of 15 mm; the profiled steel sheet has the advantages of multiple processing procedures, complex process and higher technical content; the steel coil is subjected to the following process: punching, baking finish and profiling.

Punching: the sound absorbing supporting layer 110, namely the profiled steel sheet, is formed by punching a steel coil, and the two sides of the profiled steel sheet are not symmetrical, so that the position of a punching area in the steel coil is determined according to the unfolding size of the plate shape in order to ensure the symmetry of the hole position after profiling, and meanwhile, the characteristic of certain extension in the profiling process is considered. The punching quality mainly controls flatness and burrs, and the inspection standard is the enterprise standard of a manufacturer.

Profiling: the method is characterized in that computer numerical control profiling equipment is adopted for one-time processing and molding, and because the two sides of the molding plate are provided with large and small edges, and the position of the punching area on the steel coil is asymmetric, the feeding direction is correct during profiling, and the position of the punching area after molding can be ensured to be accurate;

the first waterproof layer 10 is an aluminum-magnesium-manganese roof board, namely, the aluminum-magnesium-manganese roof board consists of a plurality of 65/430-shaped aluminum-magnesium-manganese vertical edge locking plates with the thickness of 0.9mm, the vertical edge locking plates are transversely adjacent and connected through connecting pieces, namely, clamps, the roof board belongs to an edge locking occlusion system, and the surface is provided with no perforation and no puncture in a concealed installation design, so that the whole roof system forms weather resistance. The support 11 for fixing the roof board is fixed with the lining purlin 62 by adopting an aluminum alloy fixing seat, and then the roof board and the plum blossom head of the aluminum support 11 are buckled by using a serging machine. In addition, a 5mm thick anti-corrosion gasket is added under the fixed seat and is fixed by a screw, so that electrochemical reaction between an aluminum component and steel can be prevented, and the cold bridge effect can be effectively controlled.

The roof board is connected with the bracket into a whole with waterproof and wind resistance by adopting a special serging machine, screws do not need to penetrate the roof board, and the whole roof board system can freely slide and stretch under the temperature change, so that the phenomenon of roof leakage caused by the dislocation of seaming seams between the roof boards due to the thermal expansion and the cold contraction of the roof board due to the temperature change is avoided;

when the roof board is transported, two rows of steel wire ropes are arranged between the cornice and the ground in a pulling mode, the width distance between the steel wire ropes is 500mm, the hanging clips are arranged on the steel wire ropes and connected with the steel wire ropes through pulleys, the hanging clips are connected through soft ropes, the board is placed on the hanging clips when the roof board is transported, the board is pulled by manpower to move upwards without sliding the sliding ropes, the roof board is transported to the roof, the roof board continues to slide forwards until reaching the top of the roof through a support after being transported to the top of the roof, and the roof board is stacked in a region range which is arranged near the cornice.

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

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

checking and rechecking with the main steel structure 150 model: because the working surface of the roofing engineering is steel structure professional, the roofing skin model must be matched with the main steel structure 150 model, and the outer decorative surface modeling size is prevented from being changed due to the error of the main steel structure 150 model. Timely adjusting the size and the crust model of the main steel structure 150;

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

The metal roof is enabled to be in a whole shape with gradient through the countermeasure, the roof has smooth lines, and the metal roof has whole smoothness and attractive appearance.

The roof has unique modeling, and the whole roof system with the stainless steel gutter distribution not only reflects the appearance of the whole building, but also has the key problem of roof water resistance; because of the vertical seam-locked roof system, the waterproof performance of the system is superior through the self structural design and the arrangement of the through long plates. However, according to the experience of conventional engineering, when the positions such as edges and ridges 140 are involved, the positions which are easy to cause water leakage are also needed to be provided with enough waterproof measures to ensure the leakage-proof performance of the whole roof.

According to the invention, by utilizing the weldability of the roof board material, aluminum welding is adopted for constructing the gap parts such as the connecting joints and the parts easy to leak water, so that the whole roof forms a closed whole; the leakage resistance between roof boards is achieved through the characteristics of the roof boards, such as the non-penetrating screw exposed installation characteristic and the water retaining performance of the anti-capillary grooves of the roof boards; and the weldability of the aluminum alloy material can be utilized at the perforation position, the flashing 143 is directly welded with the roof board, so that the flashing is integrated with the roof waterproof board, namely the first waterproof layer, to improve the overall waterproof performance.

The wind resistance of the metal roof is the key point of the metal roof engineering, the structural wind load is checked and calculated in the deepening design stage, and the purline encryption treatment is carried out on the parts with larger wind load bearing capacity of the edge areas such as cornice and the like according to the calculation result; the roof waterproof board, namely the first waterproof layer 10 is installed and locked at the same time, so that weather such as strong wind is prevented; when in serging, manual pre-serging is performed firstly to ensure that the aluminum alloy fixing seat is completely matched with the roof board, and then an electric serging machine is adopted for automatic engagement, so that the wind resistance of the roof waterproof board is further ensured.

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

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

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

The fixing piece 81 is positioned on the dust-proof layer 100, and part of the fixing piece 81 penetrates through the sound-absorbing layer 90 and is fixed on the secondary purlin 122, and the other part of the fixing piece 81 is positioned above the sound-absorbing layer 90; the fixing member 81 comprises a plurality of support 811 members and a buttress 812, wherein the plurality of support 811 members are connected to the secondary purline 122 through the insulation 40, and the buttress 812 is connected to the upper end of the plurality of support 811 members;

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

referring again to fig. 3-4, the insulating support layer 70 is secured to the bearing 82; vapor barrier layer 50 is laid on thermal insulation support layer 70; the support assembly 60 is further included, the support assembly 60 comprises a mounting piece 61 and a lining purlin 62, the mounting piece 61 is positioned on the heat insulation support layer 70, and the mounting piece 61 is fixed on the bearing piece 82;

two ends of the lining purlin 62 are respectively connected with the corresponding mounting pieces 61, the lining purlin 62 is arranged along the supporting piece 82 in a through length mode, the lining purlin 62 transversely penetrates through the heat insulation layer 40, and the lining purlin 62 is arranged at the same height as the heat insulation layer 40;

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

The metal roof structures on the metal roof, which are positioned on the two sides of the ridge 140, are arranged in a downward inclined manner;

the vertical edge locking plates on two sides of the roof ridge 140 are bent upwards near the end sides of the ridge 140, and a sealing plug 141 is arranged along the bent parts of the vertical edge locking plates bent on two sides, and the sealing plug 141 is fixed by a ridge sealing piece 142; edge folding plates 143 are arranged outside the ridge 140, and flashing plates 143 are connected to the edge folding plates 144 at the two end sides of the ridge 140;

the end of the upstanding lockstitch plate adjacent to the gutter 130 is bent downwardly and a lower plug 136 is provided adjacent the end of the upstanding lockstitch plate; a drip sheet 137 is arranged below the end of the upright edge locking plate; the gutter is positioned at the outermost side of the roof board or water baffles are arranged at two sides along the length direction of the gutter.

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

re-measuring elevation and axis positions of the roof steel structure after construction, counting the elevation and the position fixed by the main purline 121 and the first waterproof layer 10 according to construction drawing modeling, measuring coordinates of mounting points of each purline and control points of a roof plate fixing seat on a model, and counting various data of the mounting elevation and the position fixed by the purline and the roof plate; and laying roof elevation control points, and carrying out control measurement of purlines, roof bottom plates and roof plate positioning according to the plate installation layout.

In order to guarantee the quality of installation, accurate measurement location is the precondition of guaranteeing construction quality and effect, and measurement location scope includes: purlin, stainless steel gutter; cornice framework; the purlin layer board is just the stainless steel support. The invention has the characteristics of higher structure, more complex structure, serious cross operation and the like, and has great measuring and positioning difficulty. The method specifically comprises control network guiding measurement, gutter positioning measurement and purline positioning line measurement.

(1) Control network pilot measurement

1) Plane control network pilot measurement

According to the construction partition, a criss-cross plane control net is guided and measured to the upper surface of a roof steel structure in each construction area, and when construction is performed, constructors sequentially measure and put control lines of a main purline 121, a secondary purline 122, a bottom plate, a roof plate and a gutter bracket according to the horizontal control net. The distance between the plane control nets is not more than 30 meters.

2) Elevation control point guiding and measuring

The method is characterized in that the elevation control points provided by an owner (supervision) unit or a general package unit are utilized, the building control elevation is guided to the upper surface of the roof steel structure by using a steel rule, and the density of the elevation control points is noted during the guiding, so that the measurement and control of the roof elevation are convenient. And accurately measuring the point position.

(2) Gutter positioning measurement

After the axis and the elevation control net points are guided to the roof, roof positioning measurement is carried out, roof gutter position lines are firstly determined according to a plane control network, during measurement, the position control points of all the gutter 130 are measured through the axis control network by using a steel ruler, at least three points are measured for each gutter 130, and each point is measured through two control lines of two gutter 130 so as to check gutter position errors.

(3) Purlin alignment line measurement

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

When the purlin layer board is in processing, adjust purlin layer board height according to measured data, the truss error is positive value, and purlin layer board is increased, and the truss error is negative value, and purlin layer board height reduces. After the adjustment, the main purline 121 is measured on the purline support plate, and the main purline 121 is marked on the purline support plate by an oil pen and used as a height positioning line for the main purline 121.

The secondary purline 122 is measured and positioned, the plane position of the secondary purline 122 is firstly positioned, the measuring method is to measure and position according to a plane control network, the elevation compensation value of the secondary purline 122 is determined in a computer three-dimensional graph after positioning, the angle value of the secondary purline 122 and the main purline 121 is measured, and the data are measured and placed on the main purline 121 as construction basis.

1) Secondary purlin 122 installation angle

The secondary purlines 122 on the same main purline 121 are not perpendicular to the main purline 121, the angle between the secondary purline 122 and the main purline 121 is a variable value, and adjustment is noted during installation.

2) Roof boarding measuring and positioning

The roof board measuring and positioning principle relates to a roof board arrangement, namely, a roof deep-gutter position line is positioned firstly, then a ridge 140 positioning line is positioned, and the distance between the two lines is the board length.

S20, a first structural layer 120, a sound absorption supporting layer 110, a dust-proof layer 100, a sound absorption layer 90, a second structural layer 80, a heat insulation supporting layer 70, a steam barrier layer 50, a sound insulation layer 30, a second waterproof layer 20 and a first waterproof layer 10 are sequentially arranged;

s30, installing the gutter, namely sequentially installing 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 from bottom to top.

The main process in the construction process of the gutter 130 comprises the following steps: the gutter keel is provided with a gutter supporting layer 135, a gutter structural layer, a gutter heat preservation layer 134, a heat insulation layer 133, a gutter second waterproof layer 132 and a gutter first waterproof layer 131; the gutter structure layer comprises a gutter bottom plate, a side sealing plate, a structural layer, a gutter plate, a gutter baffle, a lower plug 136 and a water dripping piece 137.

Because the stainless steel plate gutter is adopted, the bearing mainly depends on the gutter support at the lower part, namely the gutter support layer 135, and when the gutter support is installed, the distance between the top surface of the gutter support and the top surfaces of purlines 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 gutter support is uniformly stressed. The gutter support adopts galvanized square steel pipe, welds on the main structure, and the adjustment support width should be paid attention to when installing, should be slightly wider than the gutter external diameter 10mm. So that the gutter can be better positioned.

The cutting opening is polished clean before the gutter of the stainless steel plate, namely the gutter structural layer is butted, the butt joint gap cannot exceed 1mm during butt joint, the butt joint length is about 10mm, spot welding is performed at intervals of 10cm before welding, and the welding can be performed after the welding requirements are met. The type of the welding rod is determined according to the base material. The weld is formed in one pass. In order to accelerate the gutter installation speed, two to three gutter sections can be spliced into a whole on the ground, and then the gutter sections are hung to an installation position for installation in place, so that the butt joint quality of the gutter sections 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 or not is checked in rainy days, if the air holes are found to be water permeable, a polishing machine is used for polishing the position, and welding is performed again. Gutter expansion joint manufacturing method: namely, an expansion joint is arranged on each gutter at intervals of 30 meters. And reserving 50mm of the expansion joint positions of the gutter plates at the opposite joints, and welding the metal plates at the two ends of the expansion joint adhesive tape with the gutter argon arc.

After installing a section of gutter 130, several holes are drilled in the middle of the designed water falling hole, so that the gutter 130 is prevented from storing water and the construction is prevented from being influenced. After the plates at the corresponding positions of the gutter 130 are installed, the water falling holes must be opened in time. The rainwater downpipe is completed by a drainage construction team, and the formal downpipe is required to be drilled by a hollow drill.

After all the working procedures are completed, unified trimming treatment is carried out to clean burrs and unevenness of the sheared edge.

After the finishing, the gutter 130 is cleaned, and the wastes, especially the gully position, during roof construction are removed, so that the accumulation of the waste is avoided, and the smoothness of running water is ensured.

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

The roof gutter adopts a special tool to bend the plate end of the roof plate downwards so as to facilitate drainage, and simultaneously, a lower plug 136 is arranged at the plate end so as to seal the roof and prevent rainwater from flowing back; the drip sheet 137 is provided to play a role in drip water prevention, and the roof boards at the gutter are connected to form a whole to enhance wind resistance, and the outermost side is provided with a water baffle for wind prevention and water prevention, namely, a sealing plate at two sides along the gutter direction.

Wherein, step S20 further includes:

s21, connecting a main purlin 121 and a main steel structure 150 to form a whole through bolts and a purlin supporting plate 150, connecting and fixing a purlin supporting plate and the main steel structure 150 in a welding mode, installing two ends of a secondary purlin 122 on two adjacent main purlins 121 through purlin supporting lining plates, and vertically arranging the secondary purlins 122 and the main purlins 121;

In the construction process of the main purline 121 and the secondary purline 122, the installation positions and elevation of the main purline 121 and the secondary purline 122 are determined, the purline supporting plate and the purline supporting plate 123 are positioned and paid out, the bolts are installed, the main purline 121 and the secondary purline 122 are installed, the main purline 122 and the secondary purline 122 are subjected to arc-ejecting operation, the measuring and rechecking operation, the elevation and the installation gradient are adjusted and fixed.

The purlin supporting plate and purlin supporting plate 123 positioning method is as follows:

a. according to the off-site ground measurement datum point, an elevation locating point is put in, and a reference coordinate is determined.

b. And determining the positions of the purlin supporting plate and the purlin supporting plate 123, positioning lines in two directions perpendicular to each other of the purlin supporting plate and the purlin supporting plate 123 and coordinate values of the key points purlin supporting plate and the purlin supporting plate 123 according to the elevation positioning points and the axes.

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

d. Before the purlin supporting plate is fully welded, the axial displacement, levelness and mid-span verticality of the purlin supporting plate are checked, and if the purlin supporting plate is poor, correction is needed; and meanwhile, after the purlin supporting plate is fully welded, the welding seams are required to be derusted, and the anti-corrosion paint is brushed.

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

In the welding process, measures for reducing deformation are adopted, symmetrical spot welding is firstly 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 unqualified and is required to be corrected, and spot welding is required to be firm.

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

When welding, the current is proper, no air holes and cracks can be formed after the welding seam is formed, no undercut and weld flash can be formed, the welding seam size can meet the design requirement, the welding wave is uniform, and the welding seam is formed in an attractive manner.

The elevation of the main purline 121 can be adjusted by adjusting the elevation through the height of the purline supporting plate and the elliptical holes on the purline supporting plate, and by processing purline supporting plates with different lengths. The deviation measurement of the steel structure is inserted into the measurement work in time during the construction of the steel structure, so that the timeliness and the construction period of the processing of the purlin supporting plate and the purlin supporting plate 123 are ensured. According to the main purlin 121 and the secondary purlin 122 measuring method, the summary of the measured data and the deepening of the purlin supporting plate and the purlin supporting 123 are performed in time. The secondary purlins 122 are height adjustable by vertical length of the purlin brackets 123.

In order to ensure the installation quality of the main purlines 121 and the secondary purlines 122, before the construction of the main purlines 121 and the secondary purlines 122, retesting is carried out on the coordinates of the main structure, namely the roof steel structure, and for overlarge deformation, correction is timely carried out, so that the construction quality of the main purlines 121 and the secondary purlines 122 is ensured; and a control point is arranged, the multipoint paying-off is realized, the height is adjusted by utilizing the purlin support plate, and the paying-off accuracy is ensured.

S22, the sound-absorbing support layer 110 is perpendicular to the secondary purline 122, and the sound-absorbing support layer 110 is mounted on the secondary purline 122 through self-tapping nails 111;

when the sound-absorbing support layer 110 is installed, the skeleton at the parapet wall outside the gable cornice, i.e. the outer wall, is taken as a datum line to determine the installation axis of the sound-absorbing support layer 110. The installation flow is as follows: installation preparation, installation operation platform setting, retesting of steel structures, building elevations and the like before installation, transportation (to an installation operation surface) of the sound absorption supporting layer 110, namely a roof bottom plate, datum line placement, installation of a first plate, retesting, subsequent installation of the roof bottom plate, self-checking after installation completion, refurbishment and verification.

The quality of installation of the roof bottom plate, i.e., the sound absorbing support layer 110, directly affects the shape and various properties of the entire roof. Therefore, the roof bottom plate needs to retest the elevation of the steel structure main purline 121, the secondary purline 122 and each key part which are already installed on the construction working surface before installation, and the places which are not in accordance with the design are found to be communicated and coordinated with the steel structure units and the supervision in time, and local adjustment is carried out, so that the smooth installation of the bottom plate is ensured.

The positioning plate is installed by first putting out the positioning plate border before the sound absorbing support layer 110, i.e. the base plate is installed. The bottom plates are sequentially installed according to the positioning plates, and a composite line is arranged on each ten rows of plates. The mounting size deviation of the bottom plate is checked and adjusted so as not to generate larger accumulated errors.

Before the bottom plate is installed, the bottom plate installation edge line is popped up on the main purline 121 and the secondary purline 122, then the bottom plate is installed, the bottom plate installation edge line takes the longitudinal or transverse axis as a reference, two points on the bottom plate edge line are measured along the longitudinal or transverse axis, the two-point connecting line is the bottom plate installation edge line, the bottom plate installation edge line is rechecked after being measured and placed, the bottom plate installation is carried out after the requirement is met, the bottom plate installation edge line requirement is accurate, and the bottom plate rib is smooth and straight.

Every 10 boards are tested and placed with a baseboard installation checking line, when the baseboard installation checking line is used for timely adjusting baseboard errors, when every 10 boards with baseboard errors are not more than 10mm, the baseboard errors can be adjusted through 10 boards in the next installation process, and if the errors are more than 10mm, the installed baseboard must be reworked and reinstalled. After the bottom plate is installed, the longitudinal and transverse axes of the roof should be sprung on the bottom plate so as to be used as a control line in the subsequent process.

In order to ensure the installation quality of the sound absorbing supporting layer 110, namely the bottom plate, the bottom plate and the secondary purlin 123 are fixedly connected through the stainless steel self-tapping screw 111, the self-tapping screw 111 is required to be firmly and reliably installed during installation, and the self-tapping screw is required to be on a line, so that the exposed screw cap is naturally straight, and the exposed screw cap is naturally curved and smoothly transited. The longitudinal lap joint length between the bottom plates is not less than 100mm, and a crest is overlapped between the transverse lap joint, for example, when the plates are contacted with each other to generate a large gap, the plates are properly fastened by using phi 4 aluminum blind nails. During installation, the overlapping of the ribs of the bottom plates needs to be paid attention to alignment so as to ensure the mutual penetration between the bottom plates. After each 8 boards are installed, inspection should be performed and appropriate adjustments should be made as needed. After a section of the area is installed, the section is inspected by measuring the width of the already fixed base plate, once at the top and bottom, to ensure that no movement or fanning occurs. After the profiling bottom plate is installed, the plate surface needs to have no residue and dirt. The joints of each plate should be tight, smooth and straight, reliable in anchoring, straight in longitudinal and transverse joints and flat and clean in plate surface.

When the first bottom plate is installed, the first bottom plate is installed according to the tested control line, and the plate installation is used for checking the straightness of the two ends and the middle of the plate and the parallelism of the whole plate at any time, so that the whole plate is prevented from being in a fan shape. Before the bottom plate is installed, the self-tapping fixed position is marked on the plate by using a marking pen according to the distance between purlines, so that the problems that the distance between the self-tapping nails 111 is different or the self-tapping nails 111 are not fixed on the purlines are prevented. The overlapping length and the seam condition of the longitudinal and transverse plates are checked at any time in the installation process, the plates are adjusted in time, and the fault positions of the self-tapping nails 111 are repaired in time during fixing. When the bottom plate is perforated, the bottom plate is perforated according to the actual size, for example, a shearing gun or a manual shearing gun is not used for perforating the bottom plate, and toothless saw cutting is not used for cutting. The bottom plate should ensure the anchor reliably when the installation, and the installation is leveled, and the board seam contact is tight, and the face is clean. It is an important link to ensure that the bottom plate is not damaged in the subsequent construction process after the bottom plate is installed. The floor of the cutting machine is not suitable to be in direct contact with the plate surface in the process of on-site cutting without moving at will, and the three-in-one plate is used for padding.

S23, paving the dust-proof layer 100 and the sound-absorbing layer 90 along the direction of the sound-absorbing supporting layer 110 and paving the dust-proof layer and the sound-absorbing layer from the gutter to the ridge 140;

S24, firstly combining and welding the support pier 812 and a plurality of section steels to form the fixing piece 81, then fixing the fixing piece 81 on the secondary purline 122 by penetrating through non-woven fabrics and the sound absorption supporting layer 110 through self-tapping nails 111, and enabling the sound absorption layer 90 to be turned outwards, welding the support piece 82 on the support pier 812, and forming a cavity between the upper end face of the support piece 82 and the sound absorption layer 90;

s25, paving the heat-preserving support layer 70 on the bearing member 82 and fixing the heat-preserving support layer 70 along the whole length of the bearing member 82;

s26, arranging mounting pieces 61 in a clearance way, arranging lining purlins 62 along supporting pieces 82 in a through length way, closely paving heat preservation layers 40 between the lining purlins 62, and carrying out equal elevation on the heat preservation layers 40 and the lining purlins 62;

when the heat preservation layer 40 is paved, namely, a paving mode is designed before paving heat preservation rock wool, hereinafter, the heat preservation wool is simply called, size cutting and blanking are calculated according to the paving mode, the straight line error of the cutting edge is not more than 5mm, the splice seam is not more than 2mm, and the gaps between the plates are bonded by using special adhesive tapes.

When the heat insulation cotton is paved, the heat insulation cotton is sequentially paved from one side of the roof to the other side, the lap joints of two adjacent heat insulation cotton blocks are staggered, and the ends and the edges of the heat insulation cotton blocks are fixedly riveted by special tools.

The key of the construction of the heat-insulating material is waterproof, in order to prevent the heat-insulating material from being exposed for a long time, the heat-insulating material must be closely organized and intensively constructed during construction, the exposure time of the heat-insulating material is reduced as much as possible, meanwhile, a rainproof tarpaulin is prepared, and the heat-insulating material which is not covered is temporarily covered in time after the construction is finished, so that the heat-insulating material is prevented from being wetted by rain at night. The method is characterized in that the method is strictly paved, and the joints are lapped to prevent cold bridges.

The installation of the heat preservation cotton is particularly important to ensure the construction quality of corner parts, such as the intersection of a roof and a skylight, gable edges, flashing outer edges, edge elevation blocking and the like, which are easy to neglect in construction, and cold air is invaded into a room from the parts to influence the heat preservation effect of the whole roof, so that the heat preservation cotton is an important control part in the construction process.

In order to ensure the installation quality, the heat-insulating cotton must be laid flat and folded; the joints are tight, the heat-insulating cotton must be laid and cut according to the roof modeling, and the heat-insulating cotton must be closely laid according to the standard requirements to meet the design requirements of the system; the paving direction is tightly paved along the direction vertical to the long side of the profiled steel sheet. In order to ensure the engineering construction quality, the windproof and rainproof protection measures are strictly taken, and the construction is strictly forbidden in rainy or windy weather. In order to prevent the installed heat preservation layer 40 from being exposed to the outside for a long time, the construction must be tightly organized, a detailed construction plan must be formulated, the construction must be concentrated, the long-time stacking of excessive cotton materials on the roof is stopped, the exposure time of the heat preservation layer 40 is shortened as much as possible, meanwhile, the waterproof cloth is prepared, the uncovered heat preservation cotton is temporarily covered in time after the construction is finished every day to prevent from being wetted by rain, the humidity and the appearance quality of the materials must be strictly checked before the heat preservation cotton is paved, the paving and the installation must be strictly forbidden due to the damp and the damage of the heat preservation cotton, and unified scrapping treatment is required. The installation of the heat preservation cotton needs to be fixed in time, and the arrangement of the heat preservation nails needs to be strictly executed according to the standard requirements. Measures such as wind prevention, rain and snow prevention and the like are taken, and the use function of the structural layer after the installation is completed is ensured. The thickness of the waterproof heat-insulating structure layer is measured at any time, so that the waterproof and heat-insulating effects of the roof are ensured. The working procedures of the roof are strictly executed according to the design requirements, and the requirements of the structural layer number are required to be met. And the waterproof and heat-insulating construction regulations required by the design and specification are strictly executed, so that the use requirement of the roof is guaranteed.

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

s28, mechanically fixing the second waterproof layer 20, welding through hot air and paving on the sound insulation layer 30; the first waterproof layer 10 is fixed through the support 11, the support 11 penetrates through the second waterproof layer 20 and the sound insulation layer 30 through the tapping screw 111 to be fixed on the lining purlin 62 to the upper side, and after the gap between the supports 11 is arranged and installed, waterproof treatment is carried out on the support 11.

Adopting a theodolite to guide an axis to the upper surface of the purline, and taking the axis as a longitudinal control line for mounting the support 11;

during installation, a self-tapping screw is driven in, then the support 11 is corrected once, deviation is adjusted, and the installation direction of the end of the support 11 is consistent with the pavement direction of the roof board. After correction, a second screw is driven in to fix the screw. After the installation, the fastening degree of the screw is controlled, so that sinking nails or floating nails are avoided; after installation, each row of supports 11 is first visually inspected to see if it is in line.

The first waterproof layer 10 is installed, namely the roof board is installed, and the main steps comprise preparation work, paying off, transportation in-place installation, seaming, biting, trimming edges of the board, flashing installation after edge folding, water-proof treatment of a hole, roof cleaning, self-checking correction and verification.

Preparation: before the roof board is installed, the installation area is required to be subjected to concealing test, and foreign matters, particularly combustible matters, cannot be arranged below the installation area. If foreign matters are needed to be corrected and checked, the panel can be installed.

Paying off: plane control of the roof panels is typically accomplished by positioning the roof panels below the T-bar support 11. The fixed support 11 pays out according to the size of the surface layer plate, and is fixed on the leveling steel plate by using blind rivets after the noise reduction net spacing is 350 mm. The mounting of the fixed support 11 must be straight. After the roof boarding fixing support 11 is installed to be qualified, only a locating line at the board end is needed. The distance from the plate to the edge of the drainage ditch is generally used as a control line, and the length of the plate extending out of the edge of the drainage ditch is preferably slightly larger than that of the plate, so that the plate is convenient to trim.

And (3) transportation and positioning and installation: when the constructor lifts the plate to the installation position, the control line at the end of the plate is aligned when the constructor is in place, then the joint edge is pressed into the joint edge of the previous plate by force, and finally whether the joint edges are tightly jointed or not is checked.

Occlusion: after the roof board is well adjusted in position, a special electric serging machine is used for serging. The bitten edges are required to be continuous and smooth, and cannot be distorted or split. During the process of the undercut machine for undercut crawling, the front part of the undercut machine must be tightly clamped by force within 1m range, so that the joint edges are tightly jointed, which is also the key point of the quality of mechanical undercut. The roof panels in place on the day must be finished with undercuts to prevent the panels from being blown out or scraped away when the wind is coming.

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

Edge-closing waterproof installation and hole treatment: the edge-closing waterproof installation and the hole treatment are the key of roof engineering waterproof. Before edge finishing and flashing installation, flanging treatment is carried out on the upper end of the roof board. The model of the components should be carefully checked before the edge-closing flashing is installed, and the components cannot be used in disorder. The edge-closing waterproof lap joint is continuous, and the lap joint direction strictly adheres to the lap joint layer. All openings on the roof are required to be subjected to waterproof treatment according to design nodes, particularly the openings caused by various pipelines and artificial reasons, or are closed by adopting waterproof coiled materials or adopting a welding mode.

Cleaning, changing and reporting and checking: after the installation of the metal roof plate is completed, the roof is thoroughly cleaned, whether the holes and the leakage points are unsealed or not is checked, and timely verification of verification conditions is achieved.

The roof system, namely the aluminum alloy vertical overlock roof system, is buckled together through ribs with different sizes on two sides of the roof board and then connected together in a mechanical engagement mode, has a very good waterproof effect, and the grooves for preventing capillary action of rainwater are arranged on one side of the male rib of the roof board, so that the leakage of details of the rainwater can be realized, and meanwhile, the roof system also has a breathing effect through the grooves. The installation direction of the roof board is along the slope direction, rainwater flows from the high position to the low position on the same panel, enters the gutter and is discharged out of the roof through siphonage, so that the natural and smooth outflow of the roof rainwater can be ensured, and the rainwater cannot permeate into the roof board.

The roof ridge 140 adopts ridge 140 flanging tool to bend the end of roof panel upwards to prevent rainwater from flowing in, the lower plug of ridge 140 is arranged to prevent rainwater from flowing backwards and play a sealing role, the aluminum alloy ridge sealing piece 142 is arranged to prevent water and wind, and the outermost side is provided with roof edge-folding plate flashing, wind resistance and water resistance.

After the roof slab rib is buckled into the fixing seat, the tile clips are not used for temporary fixing in real time in surface construction, the respective fixing seat can pop up the roof before the edge locking due to the existence of stress in the slab during the buckling, and the slab rib can be locked and broken without final inspection of the installation quality of the roof slab before the edge locking.

After the board is buckled, each fixing seat is checked to see whether the board rib is completely buckled, and if the board rib is not buckled and is well buckled again.

After the lower plate is installed after the plate is completely buckled, after a plurality of plates are installed, the manual splint device is used for pre-locking the edges, the fixing seat is pre-locked, the buckling of the plate rib is guaranteed to be completed at the upper support end of the fixing seat, if the fixing seat is not enough in installation accuracy during pre-clamping, the plate rib is required to be timely adjusted when the lock is not on or the installation position of the fixing seat is lower and is not buckled, and the plate rib is prevented from bursting or being empty after the electric edge locking.

After the manual serging is finished, when electric serging is carried out, a serging operator should carry a rubber hammer at hand, the front of the electric serging machine is knocked on the plate rib, especially the fixing seat part, so that the fixing effect of the plate is checked again, and if the fixing seat is not well buckled, the electric serging machine is required to be stopped and adjusted again. When in serging, serging personnel need to use pedals to place the plate ribs in front of the serging machine.

Although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

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

The second assembly layer sequentially comprises a heat insulation supporting layer connected to the second structural layer from bottom to top, and a vapor barrier layer, a sound insulation layer, a second waterproof layer and a first waterproof layer which are sequentially arranged on the heat insulation supporting layer; the first structural layer includes:

the purlin supporting plates are fixedly distributed 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 purlin bracket plate; the horizontal height of the main purline is adjustable;

the sound-absorbing support layer is fixed on the secondary purline, the dust-proof layer is laid on the sound-absorbing support layer, and the sound-absorbing layer is laid on the dust-proof layer;

the second structural layer includes:

the heat-insulating supporting layer is fixed on the bearing piece;

the steam barrier layer is paved on the heat insulation supporting layer;

a heat insulation layer is paved on the steam barrier layer;

the sound insulation layer is laid on the heat insulation layer;

the support assembly comprises an installation piece and a lining purlin, wherein the installation piece is positioned on the heat insulation support layer and is fixed on the bearing piece;

the second waterproof layer is paved 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 clearance mode;

The first waterproof layer consists of a plurality of vertical edge locking plates, and adjacent vertical edge locking plates are connected through a clamp;

the support is made of high-strength aluminum alloy;

the second waterproof layer is a TPO waterproof coiled material;

the sound insulation layer is a cement density board;

the heat preservation layer is a heat preservation rock wool board;

the steam barrier layer is a steam barrier film;

the heat-insulating supporting layer is a profiled steel sheet;

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

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

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 preservation layer, a heat insulation layer, a gutter second waterproof layer and a gutter first waterproof layer which are sequentially arranged from bottom to top.

2. A metal roofing structure according to claim 1, wherein,

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

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

3. A method of constructing a metal roof structure as claimed in claim 1 or 2, wherein: the method comprises the following steps:

s10, preparation before construction: encrypting the reference level points of each horizontal plane at the ground test position, and performing closing difference adjustment on the reference level points of each vertical plane so that each point is on the same horizontal plane;

4. A method of constructing a metal roof structure according to claim 3 wherein: wherein step S20 further comprises:

5. The method for constructing a metal roof structure according to claim 4, wherein:

in step S20, when the main purline and the secondary purline are installed, the coordinates of the control nodes need to be corrected, and the installation direction of the purline support plate is adjustable;

paving heat preservation cotton; the edges of the heat-insulating cotton are folded, and the joints of the adjacent heat-insulating cotton are tight.