Construction method of gridding flexible roof

Abstract

The invention relates to a construction method of a gridding flexible roof. The construction method is applied to construction of a double-curved-surface saddle-shaped roof. The horizontal projection of the roof is an ellipse, the short axis of the ellipse is L1, the long axis of the ellipse is L2, the arc length of the section of the roof at the short axis is l1, the radius of the circle is R1, the arc length of the section of the roof at the long axis is l2, and the radius of the circle is R2; the method comprises the steps of 1, determining unit roofs; the roof is divided into a plurality of independent unit roofs according to the grids of the cable net structure, the length of the unit roofs in the short axis direction is a1, and the length of the unit roofs in the long axis direction is a2; 2, determining the width of the deformation joint; thirdly, unit roofs are manufactured; fourthly, unit roofs are installed; fifthly, the deformation joint is filled; sixthly, a waterproof layer is laid. Deformation coordination between the metal roof and the cable net structure can be achieved, and therefore the integrity and functionality of the roof are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of construction, and in particular to a method for constructing a gridded flexible roof. Background Art

[0002] Contemporary large-scale public buildings often feature curved surfaces, particularly landmark buildings and large stadiums. These structures typically utilize a metal roof structure with a steel structure to meet diverse design requirements. Metal roofs are composed of a primary purlin, secondary purlins, a structural layer, a roofing layer (such as a vapor barrier and thermal insulation), and a waterproof layer. The structural layer is generally the primary load-bearing component and should maintain excellent mechanical properties and structural continuity to ensure component safety. The roofing layer is generally a functional layer, offering decorative and architectural features (thermal insulation, waterproofing, and sound insulation). Unlike traditional reinforced concrete roofs, to ensure the continuity of their functions (thermal insulation, waterproofing, etc.), metal roofs must be continuous from the purlin, forming a single unit. This is known as a rigid roof. Due to their distinct functions, the structural and non-structural layers generally have significantly different mechanical properties, resulting in asynchronous deformation under varying loads (mechanical and thermal). When a building span reaches a certain limit, using steel as the roof's structural layer often results in excessive steel consumption and excessive roof loads, making it unsuitable for large-scale construction. Replacing the steel structure with lightweight cables to form a cable net structure, and using this cable net as the roof's structural layer, can effectively reduce the overall deadweight of the roof. When using a cable net structure as the structural layer, large-span roofs experience significant deformation under various loads, as the cables are more flexible than the steel structure. Under combined conditions such as roof hanging loads, roof wind loads, and snow loads, the vertical deformation of the cable net structure can reach nearly ±300mm per 100m span. If traditional construction methods are used, where an integral metal roof is attached to the cable net structure, the roof can experience inconsistent deformation between the metal roof and the cable net structure due to constant load fluctuations during installation and normal use. This can lead to tearing or crushing of the metal roof, resulting in fractures in the roof layer and compromised insulation and waterproofing functions.

[0003] In view of this, the present invention provides a method for constructing a gridded flexible roof, which solves the problem of inharmonious deformation of the metal roof and the cable net during installation and use in the cable net-metal roof system by discretizing the roof layer into multiple independent unit roofs along the cable net structure and setting expansion joints, and setting adjustable supports between the unit roofs and the cable net structure, thereby ensuring the integrity and functionality of the roof. Summary of the Invention

[0004] The present invention is intended to provide a method for constructing a gridded flexible roof to address the deficiencies in the prior art. The technical problems to be solved by the present invention are achieved through the following technical solutions.

[0005] A method for constructing a gridded flexible roof is applied to the construction of a hyperbolic saddle-shaped roof; the horizontal projection of the roof is an ellipse, with a minor axis L1 and a major axis L2; ​​the arc length l1 of the roof section at the minor axis and the radius R1 of the circle in which it is located; and the arc length l2 of the roof section at the major axis and the radius R2 of the circle in which it is located. The improvement is as follows:

[0006] Step 1: Determine the unit roof; divide the roof into a plurality of independent unit roofs according to the grid of the cable net structure, wherein the length of the unit roof in the short axis direction is a1 and the length in the long axis direction is a2;

[0007] Step 2: Determine the width of the expansion joint; the expansion joint is the gap between adjacent unit roofs, and the width of the expansion joint is D = 2l1ha1 / L1R1+2l2ha2 / L2R2, where h is the distance from the bottom surface of the unit roof to the upper end surface of the cable clamp steel support;

[0008] Step three, making a unit roof; making a unit roof according to the size determined in step one, and setting plate legs at the four corners of the unit roof;

[0009] Step 4: Install the unit roof; install the panel legs on the cable clamp steel supports to achieve the installation of the unit roof, leaving a gap between adjacent unit roofs, which is the expansion joint, and the width of the expansion joint is the expansion joint width determined in step 2;

[0010] Step 5: Fill the deformation joint;

[0011] Step 6: Lay the waterproof layer.

[0012] Preferably, a plate steel support is provided on the end of the plate support leg away from the unit roof, and the plate support leg is installed on the cable clamp steel support through the plate steel support.

[0013] Preferably, each of the four plate steel supports of the unit roof is provided with fixing holes, and the four fixing holes are the first fixing hole, the second fixing hole, the third fixing hole and the fourth fixing hole in a counterclockwise direction; the aperture of the first fixing hole matches the diameter of the bolt used for connection to achieve the fixed connection between the plate steel support and the cable clamp steel support at that location and keep the relative positions unchanged; the aperture of the second fixing hole and the third fixing hole is larger than the diameter of the bolt used for connection to achieve the fixed connection between the plate steel support and the cable clamp steel support at that location and keep the relative positions unchanged. The plate steel support can slide circumferentially relative to the cable clamp steel support within the plane where the cable clamp steel support is located under the action of load; the fourth fixing hole is a long hole, the width of the fourth fixing hole matches the diameter of the bolt used for connection, and the length direction of the fourth fixing hole is the same as the long axis direction of the roof projection to achieve a fixed connection between the plate steel support and the cable clamp steel support there and enable the plate steel support to slide relative to the cable clamp steel support along the length direction of the fourth fixing hole within the plane where the cable clamp steel support is located under the action of load.

[0014] Preferably, when filling the deformation joint in step five, first, a trimming aluminum plate is fixedly installed on the bottom surface of the adjacent unit roof, and the bottom surface of the deformation joint is sealed by the trimming aluminum plate; then, rock wool felt is filled in the deformation joint to complete the filling of the deformation joint.

[0015] Preferably, a fixing hole is provided on one side of the trimming aluminum plate, and the aperture of the fixing hole matches the diameter of the bolt used for connection so as to achieve a fixed connection between the trimming aluminum plate and the unit roof at the fixing hole and keep their relative positions unchanged; an adjustment hole is provided on the other side of the trimming aluminum plate, and the adjustment hole is a long hole, the width of the adjustment hole matches the diameter of the bolt used for connection, and the length direction of the adjustment hole is consistent with the direction of movement toward or away from the two unit roofs connected by the trimming aluminum plate so as to achieve a fixed connection between the trimming aluminum plate and the unit roof at the adjustment hole and enable the unit roof to slide in the direction toward or away from the unit roof at the fixing hole on the opposite side under the action of load.

[0016] Preferably, a continuous bending portion is provided in the middle of the edge trimming aluminum plate to provide deformation and expansion when the edge trimming aluminum plate moves toward or away from the adjacent unit roof.

[0017] Preferably, when laying the waterproof layer in step six, first, an additional layer of rolled material is laid on the two unit roofs adjacent to each other at the deformation joint and the additional layer of rolled material is made concave at the deformation joint; then, rock wool rods are filled in the concave part; finally, the waterproof rolled material is laid as a whole on the adjacent unit roofs and the surrounding unit roofs to complete the laying of the waterproof layer.

[0018] Preferably, when the additional layer of roll material is laid, the additional layer of roll material is first fixedly connected to the two adjacent unit roofs by gluing, and then further fixedly connected to the two adjacent unit roofs by screw connection.

[0019] Compared to existing technologies, the present invention divides the entire roof into multiple independent unit roofs based on the cable net structure, provides expansion joints between adjacent unit roofs, and provides a calculation formula for the minimum expansion joint width. Utilizing expansion joints and laying a certain degree of ductility on the expansion joints, a waterproofing membrane, and the physical deformation of the membrane, as well as aluminum trimming plates, the present invention accommodates the horizontal displacement of the roof units caused by the vertical deformation of the cable net structure. Cable net steel supports, plate steel supports, and plate legs form an adjustable support between the unit roofs and the cable net structure, achieving deformation coordination between the roof and the cable net structure. The present invention achieves deformation coordination between the metal roof and the cable net structure, thereby ensuring the integrity and functionality of the roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the process of the present invention;

[0021] Figure 2 Schematic diagram of the three-dimensional structure of the cable clamp node in the present invention;

[0022] Figure 3 Schematic diagram of the cross-sectional structure of the cable clamp node in the present invention;

[0023] Figure 4 This is a schematic structural diagram of the plate support legs, plate steel supports and cable clamp steel supports at the cable clamp node in the present invention;

[0024] Figure 5 This is a schematic structural diagram of the panel support legs, panel steel supports, and cable clamp steel supports at the unit roof in the present invention;

[0025] Figure 6 Schematic diagram of the node structure at the node seam in the present invention;

[0026] Figure 7 Schematic diagram of the structure of the edge-finished aluminum plate in the present invention;

[0027] Figure 8 It is a structural schematic diagram of the roof projection in the present invention;

[0028] Figure 9 This is a structural diagram of the unit roof and the plate legs in the present invention;

[0029] Figure 10 Schematic diagram of the structure of the coordinated deformation of the cables in the long axis direction of the roof projection in the present invention;

[0030] Figure 11 Schematic diagram of the structure of the coordinated deformation of the cables in the roof projected minor axis direction in the present invention;

[0031] The reference numerals in the accompanying drawings are: 1. unit roof, 2. expansion joint, 21. edge-finishing aluminum plate, 211. fixing hole, 212. adjustment hole, 213. continuous bending portion, 22. rock wool felt, 23. additional layer of roll material, 24. rock wool rod, 25. waterproof roll material, 3. plate support leg, 4. plate steel support, 41. first fixing hole, 42. second fixing hole, 43. third fixing hole, 44. fourth fixing hole, 5. cable clamp steel support, 6. cable clamp, 7. cable. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Example 1:

[0034] Reference Figures 1 to 11 As shown, a method for constructing a gridded flexible roof is applied to the construction of a hyperbolic saddle-shaped roof; the horizontal projection of the roof is an ellipse, with a minor axis L1 and a major axis L2; ​​the arc length l1 of the roof section at the minor axis and the radius R1 of the circle where it is located; and the arc length l2 of the roof section at the major axis and the radius R2 of the circle where it is located. The improvement is:

[0035] Step 1: Determine the unit roof; divide the roof into a plurality of independent unit roofs 1 according to the grid of the cable net structure, wherein the length of the unit roof 1 in the short axis direction is a1 and the length in the long axis direction is a2;

[0036] Step 2: Determine the width of the expansion joint; the expansion joint 2 is the gap between the adjacent unit roofs, and the width of the expansion joint 2 is D = 2l1ha1 / L1R1+2l2ha2 / L2R2, where h is the distance from the bottom surface of the unit roof 1 to the upper end surface of the cable clamp steel support 5 of the cable clamp 6;

[0037] Step three, making a unit roof; making a unit roof according to the size determined in step one, and setting plate legs 3 at the four corners of the unit roof 1;

[0038] Step 4: Install the unit roof; install the panel legs 3 on the cable clamp steel supports 5 to achieve the installation of the unit roof 1, leaving a gap between the adjacent unit roofs 1, which is the expansion joint 2, and the width of the expansion joint 2 is the expansion joint width determined in step 2;

[0039] Step 5: Fill the deformation joint;

[0040] Step 6: Lay the waterproof layer.

[0041] In this embodiment, the hyperbolic saddle shape refers to an ellipse of the roof having high sides and low middle in the direction of the short axis of the horizontal projection of the roof, and low sides and high middle in the direction of the long axis.

[0042] Furthermore, a plate steel support 4 is provided on the end of the plate leg 3 away from the unit roof 1 , and the plate leg 3 is installed on the cable clamp steel support 5 through the plate steel support 4 .

[0043] Furthermore, each of the four plate steel supports 4 of the unit roof 1 is provided with fixing holes, and the four fixing holes are, in counterclockwise order, a first fixing hole 41, a second fixing hole 42, a third fixing hole 43 and a fourth fixing hole 44; the aperture of the first fixing hole 41 matches the diameter of the bolt used for connection to achieve a fixed connection between the plate steel support 4 and the cable clamp steel support 5 at that location and keep their relative positions unchanged, and the apertures of the second fixing hole 42 and the third fixing hole 43 are larger than the diameter of the bolt used for connection to achieve a fixed connection between the plate steel support 4 and the cable clamp steel support 5 at that location and keep their relative positions unchanged. The plate steel support 4 is able to slide circumferentially relative to the cable clamp steel support 5 in the plane where the cable clamp steel support 5 is located under the action of load; the fourth fixing hole 44 is a long hole, the width of the fourth fixing hole 44 matches the diameter of the bolt used for connection, and the length direction of the fourth fixing hole 44 is the same as the long axis direction of the roof projection to achieve the fixed connection between the plate steel support 4 and the cable clamp steel support 5 at this location and enable the plate steel support 4 to slide relative to the cable clamp steel support 5 along the length direction of the fourth fixing hole 44 in the plane where the cable clamp steel support 5 is located under the action of load.

[0044] In this embodiment, refer to Figure 1 、 2 As shown in FIG3 , the roof is divided into a plurality of independent unit roofs 1 according to the cable net structure, and deformation joints are provided between adjacent unit roofs 1, so that the roof as a whole forms a gridded flexible roof, that is, the roof as a whole can be deformed to a certain extent and the deformation joints 2 are used to provide deformation space for the displacement of the unit roofs 1, thereby offsetting the compression or stretching of the roof caused by the up and down displacement of the cables 7, and then enabling the roof to adapt to the deformation of the cable net structure. In this embodiment, referring to Figure 3 、 4As shown in Figure 5, a cable clamp steel support 5, a plate steel support 4 and a plate support leg 3 are provided and the three are used to form a structural form of an adjustable support, that is, different forms of fixing holes are respectively provided on the four plate steel supports 4 of each unit roof 1, and the forms of the first fixing hole 41, the second fixing hole 42 and the third fixing hole 43 and the fourth fixing hole 44 are different. When the cable 7 is deformed due to the load, the cable clamp steel support 5 can be fine-tuned relative to the plate steel support 4. When the unit roof 1 is deformed due to the load, the plate steel support 4 can be fine-tuned relative to the cable clamp steel support 5, thereby isolating the deformation of the cable net structure from the deformation of the roof to a certain extent, reducing the in-plane movement of the roof caused by the deformation of the cable net structure, and then achieving the deformation coordination effect of the roof and the cable net structure.

[0045] It should be noted that the arrangement of the four fixing holes is to meet the deformation requirements of the cable 7. Figure 4 、 5 As shown in Figures 10 and 11, the first fixing hole 41 plays a fixing role, i.e., it fixes the plate steel support 4 and the cable clamp steel support 5; the second fixing hole 42 and the third fixing hole 43 play a fixing role and provide a certain sliding space, i.e., when the cable net structure is deformed, the cable net structure and the unit roof 1 can still maintain a fixed connection and a certain relative sliding through the cable clamp steel support 5 and the plate steel support 4 and the plate support leg 3; the fourth fixing hole 44 plays a fixing role and limits the relative sliding between the cable clamp steel support 5 and the plate steel support 4 to only be carried out along the long axis direction of the roof projection. Figure 10 、 11 As shown, the reason for this arrangement is that the cables 7 in the long axis direction of the roof projection are not actively subjected to force, and they are carried on the cables 7 in the short axis direction, which are passively subjected to force and passively deformed, and are mainly affected by the additional load; while the cables 7 in the short axis direction actively apply force, and the main load-bearing structure of the building is stabilized and fixed by the cables 7 in the short axis direction. It is for this reason that for large buildings with cable net structures, the deformation requirements are to extend to both sides in the long axis direction and to shrink inward in the short axis direction. Therefore, the length direction of the fourth fixing hole 44 is the same as the long axis direction of the roof projection, thereby adapting to the deformation requirements of the cables 7 in the long axis direction and the deformation requirements of the building.

[0046] For example, a large sports stadium has a roof structure consisting of a cable-net structure with a unitized roof. The roof projection is an ellipse with a minor axis of 117,000 mm and a major axis of 190,000 mm. The arc length at the minor axis is 118,000 mm, and the radius of the circle is 237,000 mm. The arc length at the major axis is 191,000 mm, and the radius of the circle is 640,000 mm. The length of the unit roof 1 along the minor axis is 4,000 mm, and the length along the major axis is 4,000 mm. The distance from the bottom of the unit roof 1 to the upper end of the cable clamp steel support 5 is 1,000 mm. The minimum width of the expansion joint was determined to be 51 mm. The stadium has been completed and in stable operation for over three years. The entire roof is currently in good condition, with both integrity and functionality maintained.

[0047] Operational monitoring data for this gymnasium shows that after three years of heavy rain, heavy snow, and force 10 gusts, the roof's maximum measured vertical displacement was approximately ±80mm, and the maximum expansion and contraction of the expansion joint was approximately 20mm. The designed maximum displacement was ±470mm, and the maximum expansion and contraction of the expansion joint was calculated to be approximately 40mm based on the maximum displacement. The expansion joint width calculated in this example is 51mm, meeting both the measured and design requirements.

[0048] In this embodiment, the entire roof is divided into multiple independent unit roofs according to the cable net structure. The unit roofs can be prefabricated in the factory and may also include functional layers such as a leveling layer, a moisture-proof layer, and an insulation layer. Deformation joints are set between adjacent unit roofs and a calculation formula for the minimum width of the deformation joints is given. The deformation joints are used to accommodate the horizontal displacement caused by the deformation of the roof. Adjustable supports are formed between the unit roof and the cable net structure by cable net steel supports, plate steel supports, and plate legs, thereby achieving deformation coordination between the roof and the cable net structure. The gridded flexible roof of the present invention can achieve deformation coordination between the metal roof and the cable net structure, thereby ensuring the integrity and functionality of the roof.

[0049] Example 2:

[0050] Based on Example 1, Figure 6 、 7 As shown, when filling the deformation joint in step five, first, a trimming aluminum plate 21 is fixedly installed on the bottom surface of the adjacent unit roof 1, and the bottom surface of the deformation joint 2 is closed by the trimming aluminum plate 21; then, the rock wool felt 22 is filled in the deformation joint 2 to complete the filling of the deformation joint 2.

[0051] Furthermore, a fixing hole 211 is provided on one side of the trimming aluminum plate 21, and the aperture of the fixing hole 211 matches the diameter of the bolt used for connection to achieve a fixed connection between the trimming aluminum plate 21 and the unit roof 1 at the fixing hole 211 and keep the relative positions unchanged; an adjustment hole 212 is provided on the other side of the trimming aluminum plate 21, and the adjustment hole 212 is a long hole, the width of the adjustment hole 212 matches the diameter of the bolt used for connection, and the length direction of the adjustment hole 212 is consistent with the direction of movement toward or away from the two unit roofs 1 connected by the trimming aluminum plate 21 to achieve a fixed connection between the trimming aluminum plate 21 and the unit roof 1 at the adjustment hole 212 and enable the unit roof 1 to slide in the direction toward or away from the unit roof 1 at the fixing hole 211 on the opposite side under the action of load.

[0052] Furthermore, a continuous bending portion 213 is provided in the middle of the edge trimming aluminum plate 21 to provide deformation and expansion when the edge trimming aluminum plate 21 moves toward or away from the adjacent unit roof 1.

[0053] Furthermore, when laying the waterproof layer in step six, first, an additional layer of rolled material 23 is laid on the two adjacent unit roofs 1 at the deformation joint 2, and the additional layer of rolled material 23 is made concave at the deformation joint 2; then, rock wool rods 24 are filled in the concave part; finally, a waterproof rolled material 25 is laid on the adjacent unit roofs 1 and the surrounding unit roofs 1 as a whole, thereby completing the laying of the waterproof layer.

[0054] Furthermore, when the additional layer of rolled material 23 is laid, the additional layer of rolled material 23 is first fixedly connected to the two adjacent unit roofs 1 by gluing, and then further fixedly connected to the two adjacent unit roofs 1 by screw connection.

[0055] In this embodiment, by laying an additional layer of roll material with a certain degree of ductility and a waterproof roll material at the deformation joint, and utilizing the physical deformation of the additional layer of roll material and the edge aluminum plate, the horizontal displacement of the roof unit caused by the up and down deformation of the cable net structure is accommodated, thereby ensuring the coordination of deformation between the roof and the cable net structure.

[0056] It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0057] It should be noted that the terms used herein are intended only to describe specific embodiments and are not intended to limit the exemplary embodiments described herein. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0059] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or apparatus.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0061] In the above detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless the context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0062] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for constructing a gridded flexible roof, applicable to the construction of a hyperbolic saddle-shaped roof; the horizontal projection of the roof is an ellipse, with a minor axis L1, a major axis L2, an arc length l1 of the roof section at the minor axis, and a radius R1 of the circle within; and an arc length l2 of the roof section at the major axis, and a radius R2 of the circle within; characterized by: Step 1: determining a unit roof; dividing the roof into a plurality of independent unit roofs (1) according to the grid of the cable net structure, wherein the length of the unit roof (1) in the short axis direction is a1 and the length in the long axis direction is a2; Step 2, determining the width of the deformation joint; the deformation joint (2) is the gap between the adjacent unit roofs, and the width of the deformation joint (2) is D=2l1ha1 / L1R1+2l2ha2 / L2R2, wherein h is the distance from the bottom surface of the unit roof (1) to the upper end surface of the cable clamp steel support (5) of the cable clamp (6); Step three, making a unit roof; making a unit roof according to the size determined in step one, and setting plate legs (3) at the four corners of the unit roof (1); Step 4, installing the unit roof; installing the plate legs (3) on the cable clamp steel supports (5) to achieve the installation of the unit roof (1), leaving a gap between the adjacent unit roofs (1), the gap is the deformation joint (2), and the width of the deformation joint (2) is the deformation joint width determined in step 2; Step 5: Fill the deformation joint; Step 6: Lay the waterproof layer.

2. The method for constructing a gridded flexible roof according to claim 1, wherein: A plate steel support (4) is provided on the end of the plate support leg (3) away from the unit roof (1), and the plate support leg (3) is installed on the cable clamp steel support (5) through the plate steel support (4).

3. The method for constructing a gridded flexible roof according to claim 2, characterized in that: Each of the four plate steel supports (4) of the unit roof (1) is provided with fixing holes, and the four fixing holes are sequentially arranged in a counterclockwise direction as a first fixing hole (41), a second fixing hole (42), a third fixing hole (43) and a fourth fixing hole (44); the aperture of the first fixing hole (41) matches the diameter of the bolt used for connection so as to achieve a fixed connection between the plate steel support (4) and the cable clamp steel support (5) at that location and keep their relative positions unchanged; the apertures of the second fixing hole (42) and the third fixing hole (43) are larger than the diameter of the bolt used for connection so as to achieve a fixed connection between the plate steel support (4) and the cable clamp steel support (5) at that location and keep their relative positions unchanged. The plate steel support (4) can slide circumferentially relative to the cable clamp steel support (5) in the plane where the cable clamp steel support (5) is located under the action of load; the fourth fixing hole (44) is a long hole, the width of the fourth fixing hole (44) matches the diameter of the bolt used for connection, and the length direction of the fourth fixing hole (44) is the same as the long axis direction of the roof projection to achieve the fixed connection between the plate steel support (4) and the cable clamp steel support (5) at this location and enable the plate steel support (4) to slide relative to the cable clamp steel support (5) along the length direction of the fourth fixing hole (44) in the plane where the cable clamp steel support (5) is located under the action of load.

4. The method for constructing a gridded flexible roof according to claim 1, wherein: When filling the deformation joint in step five, first, a trimming aluminum plate (21) is fixedly installed on the bottom surface of the adjacent unit roof (1), and the bottom surface of the deformation joint (2) is closed by the trimming aluminum plate (21); then, rock wool felt (22) is filled in the deformation joint (2), thereby completing the filling of the deformation joint (2).

5. The method for constructing a gridded flexible roof according to claim 4, characterized in that: A fixing hole (211) is provided on one side of the edge trimming aluminum plate (21), and the diameter of the fixing hole (211) matches the diameter of the bolt used for connection so as to achieve fixed connection between the edge trimming aluminum plate (21) and the unit roof (1) at the fixing hole (211) and keep the relative positions of each other unchanged; an adjustment hole (212) is provided on the other side of the edge trimming aluminum plate (21), and the adjustment hole (212) is a long hole, the width of the adjustment hole (212) matches the diameter of the bolt used for connection, and the length direction of the adjustment hole (212) is consistent with the direction of movement of the two unit roofs (1) connected to the edge trimming aluminum plate (21) towards or away from each other so as to achieve fixed connection between the edge trimming aluminum plate (21) and the unit roof (1) at the adjustment hole (212) and enable the unit roof (1) to slide in the direction towards or away from the unit roof (1) at the fixing hole (211) on the opposite side under the action of load.

6. The method for constructing a gridded flexible roof according to claim 4, characterized in that: A continuous bending portion (213) is provided in the middle of the edge-finishing aluminum plate (21) to provide deformation and expansion when the edge-finishing aluminum plate (21) moves toward or away from the adjacent unit roof (1).

7. The method for constructing a gridded flexible roof according to claim 1, characterized in that: When laying the waterproof layer in step six, firstly, an additional layer of rolled material (23) is laid on the two adjacent unit roofs (1) at the deformation joint (2) and the additional layer of rolled material (23) is made to be concave at the deformation joint (2); then, rock wool rods (24) are filled in the concave part; finally, a waterproof rolled material (25) is laid on the adjacent unit roofs (1) and the surrounding unit roofs (1) as a whole, thereby completing the laying of the waterproof layer.

8. The method for constructing a gridded flexible roof according to claim 7, characterized in that: When the additional layer of rolled material (23) is laid, the additional layer of rolled material (23) is first fixedly connected to the two adjacent unit roofs (1) by gluing, and then further fixedly connected to the two adjacent unit roofs (1) by screw connection.

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