A unitary overlapping roof membrane structure and method of construction thereof

Abstract

The application discloses a unit type overlapped roof membrane structure and a construction method thereof. The unit type overlapped roof membrane structure comprises roof trusses arranged in units, beam column structures and membrane structures connected above each roof truss; adjacent roof trusses are arranged in an up-down overlapping mode at the adjacent positions, and each unit type roof truss is arranged in a wave shape towards the upper side; and a drainage groove is arranged at each overlapping position of the roof truss. The up-down overlapping arrangement of the roof trusses is beneficial to ventilation; the wave shape arrangement of the roof trusses is beneficial to roof drainage and is aesthetically pleasing; the fixing belts of the membrane structures are arranged on the top chord bars and the connecting bars of the trusses, which is beneficial to guarantee the tension and fixation of the membrane structures, and the secondary covering of the waterproof membrane is beneficial to the connection of the membrane structures under large span and the drainage at the interactive connection positions with the water tanks; and the arrangement of the drainage grooves at the ends of the roof trusses is beneficial to guarantee the systematic drainage of the unit type roof trusses.

Description

Technical Field

[0001] This invention relates to the field of membrane structure technology, and in particular to a unit-type overlapping roof membrane structure and its construction method. Background Technology

[0002] Membrane structures are widely used on roofs due to their large span, cost-effectiveness, and aesthetic appeal. Generally, membrane structures are installed on a single, monolithic roof surface with relatively regular curvature, which facilitates the tensioning and fixing of the membrane material. However, for roofs with layered and overlapping structures, and where the individual roof units exhibit large curvature variations, specific design considerations are required. Summary of the Invention

[0003] This invention provides a unitized overlapping roof membrane structure and its construction method to solve technical problems such as truss setting, membrane structure installation on trusses, and interactive drainage system setup on trusses in unitized overlapping roofs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A unitized overlapping roof membrane structure includes roof trusses arranged in units, beam-column structures disposed below the roof trusses, and membrane structures connected above each roof truss.

[0006] Adjacent roof trusses are arranged in an overlapping manner, and each unit roof truss is arranged in a wavy shape with the shorter end facing upwards. The lower end of the previous roof truss is below the upper end of the next roof truss. Drainage channels are also provided on the roof trusses at each overlapping location.

[0007] The membrane structure is fully covered by the roof truss of the unit setting, and the membrane structure is equipped with rows or columns of fixing straps around and inside the roof truss.

[0008] Furthermore, the roof truss includes a set of wavy truss upper chord members, corresponding wavy truss lower chord members arranged parallel to the truss upper chord members below the truss upper chord members, truss diagonal web members and truss straight web members connecting each pair of truss upper chord members and truss lower chord members, truss connecting upper members that run the entire length of the truss upper chord members, truss connecting lower members arranged parallel to the truss connecting upper members, and truss connecting diagonal web members and truss connecting straight web members arranged between the truss connecting upper members and truss connecting lower members.

[0009] Furthermore, the upper chord of the truss arc, the lower chord of the truss arc, the diagonal web members of the arc truss, and the straight web members of the arc truss are set as frame members in a vertical plane, and the frame members are spaced apart along the length of the roof truss;

[0010] The truss upper members, truss lower members, truss diagonal web members, and truss straight web members are set as frame members in a vertical plane, and are all set at short upward intervals in the roof truss.

[0011] Furthermore, a membrane structure fixing band is provided on the top of the upper chord of the truss arc; a membrane structure fixing band is provided on the truss connecting rods at both ends of the roof truss in the short direction.

[0012] Furthermore, the membrane structure includes a membrane material, a membrane tensioning plate disposed below the membrane material, and an aluminum plate fixed by fastening bolts; the membrane tensioning plate is fixedly connected to the upper chord of the truss arc or the upper connecting rod of the truss, and the aluminum plates are arranged in multiple layers and clamp the ends of the membrane material; the fastening bolts fix the aluminum plates clamping the membrane material to the membrane tensioning plate; the membrane tensioning plate and the aluminum plates are combined to form a fixing band for the membrane material.

[0013] Furthermore, membrane materials are provided on both sides of the membrane plate, and a waterproof membrane is also provided on the top of the membrane plate. The waterproof membrane is connected to the top of the membrane materials on both sides and covers the aluminum plate.

[0014] Furthermore, the drainage trough includes a bottom frame, a vertical frame connected to the bottom frame, a water trough plate connected inside the water trough frame enclosed by the bottom frame and the vertical frame, a plate fastener connecting the water trough plate and the vertical frame, and a water trough cover disposed on the top of the water trough frame.

[0015] The bottom frame of the channel is supported by a channel strut near the roof truss support; the channel strut connects the upper chord of the truss arc to the bottom frame of the channel.

[0016] Furthermore, the water trough plate is installed along the length of the roof truss and the top of the water trough plate is sloped, with the lower side of the slope connecting to the end of the membrane structure.

[0017] The bottom of the water tank plate is provided with drain pipes at intervals, and a filter screen is provided on the water tank plate where the drain pipes are located.

[0018] Furthermore, supporting columns and truss braces connecting the supporting columns and the roof truss are also provided between the beam-column structure and the roof truss; the beam-column structure includes structural beams and structural columns.

[0019] A support connecting assembly is provided on the support column; the support connecting assembly includes a support diagonal bar and a support connecting rod;

[0020] The supporting diagonal rods are connected between adjacent supporting columns and between supporting columns and structural columns; the supporting connecting rods are horizontally arranged and connected to adjacent supporting columns.

[0021] Furthermore, the construction method for unitized overlapping roof membrane structures includes the following specific steps:

[0022] Step 1: Pre-construct the beam and column structure, including extending the structural columns at the four corners to create an undulating design corresponding to the roof truss; after the beam and column structure is completed, install support columns on the structural columns; the support columns are pre-connected with the upper chord and lower chord of the truss.

[0023] Step 2: For the installation of the roof truss, first install the truss arc top chord, truss arc bottom chord, arc truss diagonal web members, and arc truss straight web members; then install the corresponding truss connecting top members, truss connecting bottom members, truss connecting diagonal web members, and truss connecting straight web members.

[0024] Step 3: A membrane plate is pre-connected to the top of the upper chord of the truss arc and the upper chord of the truss; a groove support rod is connected to the lower end of the upper chord of the truss arc, and the groove bottom frame and groove vertical frame are connected; then the water trough plate and drainage pipe are installed.

[0025] Step 4: Stretch the membrane material sequentially according to the corresponding membrane stretching plate; clamp the ends of the membrane material with aluminum plates, and then fix it to the membrane stretching plate with fastening bolts;

[0026] Step 5: The upper chords and connecting rods of the truss arcs around the perimeter are fixed with membranes on one side, while the upper chords of the inner truss arcs are fixed with membranes on both sides. Waterproof membranes are installed at the membrane fixing points on both sides, and a waterproof membrane is also installed at the single-sided membrane fixing point near the water tank. The waterproof membrane extends into the flange at the top of the water tank board to facilitate subsequent drainage, thus completing the construction of the unitized overlapping roof membrane structure.

[0027] The beneficial effects of this invention are reflected in:

[0028] This invention utilizes an overlapping roof truss arrangement, which not only facilitates ventilation but also provides excellent overall rain protection in a planar projection. The wavy design of the roof truss is aesthetically pleasing and also facilitates roof drainage. The invention employs membrane structure fixing straps on the truss arc chords and truss connecting rods to ensure membrane tension and fixation. Furthermore, the secondary covering with a waterproof membrane facilitates the connection of membrane structures with large spans and drainage at the interface with the water channel. The invention also incorporates drainage channels at the ends of the roof trusses to ensure systematic drainage of the unit roof trusses. Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention. The main objectives and other advantages of this invention can be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of a unit-type overlapping roof membrane structure;

[0030] Figure 2 This is a side view of a unitized overlapping roof membrane structure;

[0031] Figure 3 This is a partial side view of a unitized overlapping roof membrane structure;

[0032] Figure 4 This is a schematic diagram of the roof truss, drainage channel and its connection structure;

[0033] Figure 5 This is a schematic diagram of a partial longitudinal section of the roof truss;

[0034] Figure 6 This is a schematic diagram of the double-sided membrane material fixing;

[0035] Figure 7 This is a schematic diagram of a single-sided membrane material fixing.

[0036] Figure 8 This is a schematic diagram of the drainage channel and its connection structure;

[0037] Figure 9 This is a schematic diagram of the water tank panel structure;

[0038] Figure 10 This is a schematic diagram of the filter screen and its connection structure.

[0039] Figure reference numerals: 1-Beam-column structure, 2-Roof truss, 21-Truss arc top chord, 22-Truss arc bottom chord, 23-Arch truss diagonal web member, 24-Arch truss straight web member, 25-Truss upper connecting rod, 26-Truss lower connecting rod, 27-Truss diagonal web member, 28-Truss straight web member, 3-Membrane structure, 31-Membrane material, 32-Tension membrane plate, 33-Aluminum plate, 34-Fastening bolt, 35-Waterproof membrane, 4-Support column, 5-Support connecting component, 51-Support diagonal member, 52-Support connecting rod, 6-Truss diagonal brace, 7-Drainage trough, 71-Trough bottom frame, 72-Trough vertical frame, 73-Trough plate, 74-Plate fastener, 75-Trough cover, 8-Drainage pipe, 9-Reinforcing plate, 10-Trough upper support rod, 11-Filter screen. Detailed Implementation

[0040] Taking a membrane structure project at a hospital as an example, its roof is an overlapping steel truss, with a steel frame structure underneath; the building's plan, where the steel frame structure is located, is approximately 32m long and 30m short. A membrane structure is installed on the roof, specifically as follows... Figures 1 to 10 As shown, the unitized overlapping roof membrane structure includes roof trusses 2 arranged in units, beam-column structures 1 located below the roof trusses 2, and membrane structures 3 connected above each roof truss 2. The membrane structures 3 are fully laid across the unitized roof trusses 2, and the membrane structures 3 have rows or columns of fixing straps around and inside the roof trusses 2.

[0041] In this embodiment, a support column 4 and a truss brace 6 connecting the support column 4 and the roof truss 2 are also provided between the beam-column structure 1 and the roof truss 2; wherein the beam-column structure 1 includes structural beams and structural columns, and a support connecting assembly 5 is provided on the support column 4; the support connecting assembly 5 includes a support diagonal rod 51 and a support connecting rod 52; the support diagonal rod 51 connects between adjacent support columns 4 and between the support column 4 and the structural column; the support connecting rod 52 is horizontally arranged and connected to adjacent support columns 4.

[0042] In this embodiment, adjacent roof trusses 2 are arranged in an overlapping manner, and each unit roof truss 2 is arranged in a wavy shape with the short end facing upwards. The lower end of the previous roof truss 2 is below the upper end of the next roof truss 2. A drainage channel 7 is also provided on the roof truss 2 at each overlapping location.

[0043] In this embodiment, the roof truss 2 includes a set of truss arc upper chord members 21 arranged in a wave-like manner, truss arc lower chord members 22 arranged in a wave-like manner and parallel to the truss arc upper chord members 21 below them, arc truss diagonal web members 23 and arc truss straight web members 24 connected between each pair of truss arc upper chord members 21 and truss arc lower chord members 22, truss connecting upper members 25 that are connected throughout the truss arc upper chord members 21, truss connecting lower members 26 that are parallel to the truss connecting upper members 25, and truss connecting diagonal web members 27 and truss connecting straight web members 28 arranged between the truss connecting upper members 25 and the truss connecting lower members 26.

[0044] In this embodiment, the truss arc top chord 21, truss arc bottom chord 22, arc truss diagonal web member 23, and arc truss straight web member 24 are arranged as frame members in a vertical plane, and the frame members are spaced apart along the length of the roof truss 2; the truss connecting top member 25, truss connecting bottom member 26, truss connecting diagonal web member, and truss connecting straight web member 28 are arranged as frame members in a vertical plane, and are all spaced apart along the short length of the roof truss 2. A fixing band for the membrane structure 3 is correspondingly provided on the top of the truss arc top chord 21; fixing bands for the membrane structure 3 are provided on the truss connecting top members 25 at both ends of the short length of the roof truss 2.

[0045] In this embodiment, the membrane structure 3 includes a membrane material 31, a membrane tension plate 32 disposed below the membrane material 31, and an aluminum plate 33 fixed by fastening bolts 34. The membrane tension plate 32 is fixedly connected to the upper chord of the truss arc 21 or the upper connecting rod of the truss 25. The aluminum plates 33 are arranged in multiple layers and clamp the ends of the membrane material 31. The fastening bolts 34 fix the aluminum plates 33 clamping the membrane material 31 to the membrane tension plate 32. The membrane tension plate 32 and the aluminum plates 33 are combined to form a fixing band for the membrane material 31. The membrane material 31 is a PVDF type architectural membrane material 31, and its color is white. The membrane material 31 is disposed on both sides of the membrane tension plate 32, and a waterproof membrane 35 is disposed on the top of the membrane tension plate 32. The waterproof membrane 35 is connected to the top of the membrane materials 31 on both sides and covers the aluminum plate 33. The tension plate formwork is a steel corner piece, with the vertical part welded to the lower truss and the horizontal part supporting the aluminum plate and serving as the foundation for fixing the fastening bolts.

[0046] In this embodiment, the drainage trough 7 includes a bottom frame 71, a vertical frame 72 connected vertically above the bottom frame 71, a water trough plate 73 connected inside the water trough frame enclosed by the bottom frame 71 and the vertical frame 72, a plate fastener 74 connecting the water trough plate 73 and the vertical frame 72, and a water trough cover 75 disposed on the top of the water trough frame. A top strut 10 is provided on the bottom frame 71 near the roof truss 2. The top strut 10 connects the truss arc upper chord 21 and the bottom frame 71. The bottom frame 71 and the vertical frame 72 are both welded from square steel pipes, the water trough plate 73 is made of stainless steel, and the plate fasteners are screws. To ensure the fixation of the drainage trough 7, the vertical frame 72 is also fixedly connected to the truss arc upper chord 21 and the top strut 10 respectively by a reinforcing plate; the reinforcing plate is made of steel plate.

[0047] In this embodiment, the water trough plate 73 is arranged along the length of the roof truss 2, and the top of the water trough plate 73 is sloped, with the lower side of the slope connecting to the end of the membrane structure 3; drainage pipes 8 are spaced apart at the bottom of the water trough plate 73, and a filter screen 11 is provided on the water trough plate 73 where the drainage pipes 8 are located. The side of the roof truss 2 with drainage pipes 8, the truss brace 6, the support column 4, and the structural column are arranged in sequence.

[0048] Combination Figures 1 to 10 As shown, the construction method for a unitized overlapping roof membrane structure includes the following specific steps.

[0049] Step 1: Pre-construct beam-column structure 1, wherein the structural columns at the four corners are extended to form an undulating design corresponding to the roof truss 2; after the beam-column structure 1 is completed, support columns 4 are installed on the structural columns; wherein the support columns 4 are pre-connected with the connectors of the upper chord 21 and the lower chord 22 of the truss arc.

[0050] Step 2: For the installation of roof truss 2, first install the truss upper chord 21, lower chord 22, diagonal web members 23, and straight web members 24; then install the corresponding upper connecting member 25, lower connecting member 26, diagonal web members 27, and straight web members 28. The truss upper chord 21 and lower chord 22 are prefabricated in the factory according to a linear design and are manufactured in segments. The segmentation lines are set on both sides of the support columns 4 corresponding to the upper and lower chords 21 and 22. Each upper or lower chord 21 is divided into three segments. When installing support columns 4, the middle segment of the segment adjacent to the support column 4 is pre-welded to the support column 4, and the remaining segments are subsequently connected by high-altitude butt joints.

[0051] Step 3: A membrane plate 32 is pre-connected to the top of the upper chord 21 of the truss arc and the upper connecting rod 25 of the truss arc; a slot upper support rod 10 is connected to the lower end of the upper chord 21 of the truss arc, and the slot bottom frame 71 and the slot vertical frame 72 are connected; then the water tank plate 73 and the drain pipe 8 are installed.

[0052] Step 4: Stretch the membrane material 31 sequentially according to the corresponding membrane plate 32; clamp the end of the membrane material 31 with the aluminum plate 33, and then fix it to the membrane plate 32 with the fastening bolts 34.

[0053] Step 5: The upper chords 21 and truss connecting rods 25 of the truss arc around the perimeter are fixed with membrane on one side, while the upper chords 21 of the truss arc inside are fixed with membrane on both sides. A waterproof membrane 35 is installed at the fixed points of the membrane on both sides, and a waterproof membrane 35 is also installed at the fixed point of the membrane on one side near the water tank. The waterproof membrane 35 extends into the flange at the top of the water tank plate 73 to facilitate subsequent drainage, thereby completing the construction of the unitized overlapping roof membrane structure.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A unitized, overlapping roof membrane structure, characterized by, The roof truss (2) is arranged in units, the beam column structure (1) is arranged below the roof truss (2), and the membrane structure (3) is connected above each roof truss (2); The adjacent roof trusses (2) are arranged in an up-down overlapping manner, and each unit roof truss (2) is arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in 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trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof trusses (2) are arranged in a wave shape in the short direction, and the adjacent roof tr ​ ​ ​ ​ ​ 2. A unitized, ballasted roof membrane structure as defined in Claim 1, wherein, ​ 3. A unitized, ballasted roof membrane structure as defined in Claim 2, wherein, ​ 4. A single-ply, ballasted roofing membrane structure as defined in claim 1, wherein, The gutter (7) comprises a gutter bottom frame (71), a gutter vertical frame (72) vertically connected above the gutter bottom frame (71), a gutter plate (73) connected inside the gutter frame enclosed by the gutter bottom frame (71) and the gutter vertical frame (72), a plate fixing member (74) connected between the gutter plate (73) and the gutter vertical frame (72), and a gutter cover (75) arranged at the top of the gutter frame. The gutter bottom frame (71) is provided with a gutter upper support rod (10) adjacent to the roof truss (2); the gutter upper support rod (10) is connected between the upper chord arc rod (21) of the truss and the gutter bottom frame (71).

5. A unitised, overlapping roof membrane structure as claimed in claim 4, wherein, The gutter plate (73) is longitudinally arranged along the roof truss (2) and the top of the gutter plate (73) is provided with an inclined surface, and the low side of the inclined surface connects the end of the membrane structure (3). The bottom of the gutter plate (73) is provided with a drain pipe (8) at intervals, and a filter screen (11) is arranged on the gutter plate (73) where the drain pipe (8) is arranged.

6. A single-ply, ballasted roofing membrane structure as defined in claim 1, wherein, A support column (4) and a truss diagonal brace (6) connected between the support column (4) and the roof truss (2) are further arranged between the beam-column structure (1) and the roof truss (2); wherein the beam-column structure (1) comprises a structural beam and a structural column. A support connecting assembly (5) is arranged on the support column (4); the support connecting assembly (5) comprises a support inclined rod (51) and a support connecting rod (52). The support inclined rod (51) is connected between adjacent support columns (4) and between the support column (4) and the structural column; the support connecting rod (52) is horizontally arranged and connected between adjacent support columns (4).

7. A method of installing a unitised, overlapping roof membrane structure as claimed in any one of claims 1 to 6, characterised in that, The specific steps are as follows, Step one, the beam-column structure (1) is constructed in advance, wherein the structural columns at the four corners are designed in a wavy manner corresponding to the roof truss (2); after the construction of the beam-column structure (1) is completed, the support column (4) is installed on the structural column; wherein the support column (4) is pre-connected with the connecting heads of the upper chord arc rod (21) and the lower chord arc rod (22) of the truss; Step two, for the installation of the roof truss (2), the upper chord arc rod (21), the lower chord arc rod (22), the inclined diagonal rod (23) and the straight diagonal rod (24) of the arc truss are installed first; then the upper connecting rod (25), the lower connecting rod (26), the inclined diagonal rod (27) and the straight diagonal rod (28) of the truss are installed; Step three, the membrane pulling plate (32) is pre-connected at the top of the upper chord arc rod (21) and the upper connecting rod (25) of the truss; the upper support rod (10) is connected at the low end of the upper chord arc rod (21) and the gutter bottom frame (71) and the gutter vertical frame (72) are connected; then the gutter plate (73) and the drain pipe (8) are installed; Step four, corresponding to the membrane pulling plate (32), the membrane material (31) is sequentially tensioned in order; the end of the membrane material (31) is clamped by the aluminum plate (33), and then is fixed on the membrane pulling plate (32) by the fastening bolt (34). Step five, on the four-week truss chord (21) and truss arc upper chord (25) set to single-sided membrane fixed, the internal truss chord (21) is provided with double-sided membrane fixed; The waterproof membrane (35) is arranged at the double-sided membrane fixed point, and the waterproof membrane (35) is also arranged at the single-sided membrane fixed point arranged near the water tank side, and the waterproof membrane (35) extends into the turn-up portion of the top of the water tank plate (73), which is beneficial to subsequent drainage, thereby completing the construction of the unit type overlapping roof membrane structure.

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