Large-span cantilever roof top drainage structure
By designing drainage ditches and water storage tanks on the top of the long-span cantilevered roof, combined with a spray system, the problems of easy blockage and poor drainage of the traditional drainage system are solved, and efficient drainage and cleanliness of the membrane structure are achieved.
Patent Information
- Application Number
- CN202420918214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-29
AI Technical Summary
Traditional membrane structure drainage systems are prone to blockage, poor drainage, and unreasonable drainage port locations, resulting in damage to the membrane material, excessive pressure on the support structure or incomplete drainage.
Design a large-span cantilever roof top drainage structure, which is set on both sides of the roof and includes drainage ditches and water storage tanks. The drainage ditch is set in the cantilever truss, gradually sloping downward, and a grate is installed on the top; the water storage tank is installed in the steel box beam, connecting the water inlet and outlet pipes; at the same time, a spray system is set up on the top of the roof to clean the membrane structure .
It effectively solves the problems of easy blockage of drain outlets and poor drainage, improves drainage efficiency, avoids damage to membrane materials and excessive pressure on the structure. At the same time, the spray system improves the cleanliness of the membrane structure and the recycling rate of rainwater. .
Smart Images
Figure CN222375827U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building engineering, in particular to a large-span cantilevered roof top drainage structure. Background Art
[0002] The design scale of the stadium in this project is 16,000 people, with a building height of 35 meters, which is a small stadium. The stadium canopy is only arranged above the west side of the stands, forming a crescent shape. The canopy as a whole conforms to the shape of the stadium, which is high in the west and low in the east, and the top surface of the roof is inclined towards the inner field with a slope of about 12°. The roof structure of the stadium is supported by only 16 slender gravity columns and 2 end columns at both ends, and the canopy is wrapped by a membrane structure. Because the drainage of traditional membrane structures is usually designed with one or more slopes on the surface of the membrane structure so that water can flow smoothly to the drain outlet; at the same time, drainage pipes are set at the bottom or periphery of the membrane structure to collect and discharge the collected rainwater. Then the water on the top of the membrane is drained to the drainage system of the building or the ground drainage system through these drainage pipes. Although the above drainage system takes drainage needs into consideration in its design, it also has some potential defects: 1 Blockage risk: Drainage pipes and drain outlets are easily blocked by various debris, such as leaves, dead branches, dust, etc., resulting in failure of the drainage system. Especially in an environment with many trees or when it is not cleaned and maintained for a long time, the risk of blockage is greater. 2. Poor drainage: If the drainage system is improperly designed or maintained, it may lead to poor drainage, rainwater accumulation on the surface of the membrane structure, increase the structural load, and even cause damage to the membrane material or excessive pressure on the supporting structure. 3. Unreasonable location of the drain outlet and poor drainage: The location of the drain outlet may be unreasonable, resulting in untimely or incomplete drainage. For example, the drain outlet is set at a high place in the membrane structure, which cannot effectively drain water; or the drain outlet is set in a position that is difficult to clean, resulting in water accumulation, etc. Utility Model Content
[0003] The utility model aims to provide a drainage structure on the top of a large-span cantilevered roof, in order to solve the technical problems that the traditional drainage system has a high risk of clogging, poor drainage leading to damage to the membrane material or excessive pressure on the supporting structure, or unreasonable selection of the drainage outlet position.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions.
[0005] A drainage structure on the top of a large-span cantilevered roof is arranged on both sides of the roof; the roof includes a steel box beam, a cantilevered truss and an inner ring beam; the cantilevered truss has a group, which is arranged on the inner side of the steel box beam at intervals along the long axis of the steel box beam; a membrane structure is covered on the top of a group of cantilevered trusses; the inner ring beam is connected to the inner end of a group of cantilevered trusses; the drainage structure on the top of the large-span cantilevered roof includes a drainage ditch and a water storage tank; the drainage ditch is arranged in the cantilevered truss near the end of the steel box beam, and is gradually inclined downward from the inside to the outside; the outer end of the drainage ditch It is connected to the steel box girder, the inner end of the gutter is connected to the inner ring beam, and the two sides of the gutter are respectively connected to the cantilever trusses; a horizontal support is arranged at the bottom of the gutter; a filter plate is arranged in the gutter, close to the steel box girder; a grate is installed on the top of the gutter; the water tank is installed in the steel box girder, close to the gutter, and one side of the water tank is connected to the water inlet pipe, and the other side of the water tank is connected to the water outlet pipe; a spraying system is arranged on the top of the roof; the spraying system is connected to the water outlet pipe, and the membrane structure is cleaned by the spraying system.
[0006] Preferably, the cantilever truss is arranged to be gradually inclined downward from the outside to the inside, and the cantilever truss includes an upper chord, a lower chord and a diagonal web; there are two upper chords, and the two upper chords are arranged in parallel and at intervals; there is one lower chord, and the lower chord is arranged below the two upper chords, and is arranged in an isosceles triangle with the two upper chords; there are two groups of diagonal webs, which are respectively connected between the two upper chords and the lower chord; the top edges of the two side surfaces of the drainage ditch are respectively fixedly connected to the upper chords on both sides; the horizontal support is connected between the diagonal webs on both sides, and is supported at the bottom of the drainage ditch.
[0007] Preferably, a water retaining plate is provided at the top of the upper chord on one side of the drainage ditch close to the end of the steel box girder and along the long axis of the upper chord.
[0008] Preferably, the cross-section of the drainage ditch is U-shaped and is made of steel plate; the top edges of the side plates on both sides of the drainage ditch are welded to the corresponding upper chord rods.
[0009] Preferably, the horizontal support includes a cross bar and a longitudinal bar; there is a group of cross bars, which are arranged at intervals along the longitudinal direction, and the two ends of the cross bars are correspondingly connected to the diagonal web bars on both sides; there are multiple groups of longitudinal bars, and each group of longitudinal bars is connected between adjacent cross bars.
[0010] Preferably, the spraying system includes a water pump, a pipe, a nozzle and a controller; the pipe is installed on the top of the steel box girder, close to one side of a group of cantilever trusses, and the pipe is arranged along the long axis of the steel box girder; the water pump is arranged between the water outlet pipe and the pipe, and water distribution pipes are connected to the pipe at intervals; the nozzle is correspondingly connected to each water distribution pipe; a filter is arranged in the water tank, close to the corresponding water outlet; the controller is electrically connected to the water pump, and is used to control the start and stop of the spraying system.
[0011] Compared with the prior art, the utility model has the following characteristics and beneficial effects.
[0012] 1. The utility model arranges drainage ditches in the cantilever trusses at both ends. Rainwater on the top of the membrane flows into the drainage ditch along the top surface of the membrane, which can not only effectively remove the water on the top of the membrane, but also arrange the drainage ditch inside the truss beam to make it more concealed, without affecting the appearance of the membrane structure, and will not cause visual interference to the structure.
[0013] 2. The utility model sets a drainage ditch in the cantilever truss throughout its length, and sets a grate on the top of the drainage ditch; the drainage outlet in this structure has a large range, which effectively solves the technical problem that the selection of the drainage outlet position may be unreasonable, resulting in untimely or incomplete drainage; in addition, the drainage ditch is set in the cantilever truss, which also solves the technical problem that the drainage outlet is easily blocked by various debris.
[0014] 3. The utility model arranges a spraying system on the top of the steel box girder. On the one hand, the spraying system can realize uniform spraying on the surface of the membrane structure and effectively clean the dirt and debris on the surface of the membrane structure; on the other hand, it improves the recycling rate of rainwater and avoids wasting water resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0016] Figure 1 The utility model is a schematic diagram of the side structure of the drainage structure on the top of the large-span cantilevered roof.
[0017] Figure 2 It is a front structural schematic diagram of the utility model in which the drainage ditch is arranged in the cantilever truss.
[0018] Figure 3 It is a structural schematic diagram of the utility model in which a water pump is connected between a pipeline and a water outlet pipe.
[0019] Figure numbers: 1-steel box girder, 2-cantilever truss, 2.1-upper chord, 2.2-lower chord, 2.3-diagonal web member, 3-inner ring beam, 4-drainage ditch, 5-water storage tank, 6-horizontal support, 6.1-cross bar, 6.2-longitudinal bar, 7-filter plate, 8-grate, 9-water inlet pipe, 10-water outlet pipe, 11-water pump, 12-pipeline, 13-nozzle, 14-water distribution pipe. DETAILED DESCRIPTION
[0020] like Figure 1-3As shown, the drainage structure on the top of the large-span cantilevered roof is arranged on both sides of the roof; the roof includes a steel box girder 1, a cantilevered truss 2 and an inner ring beam 3; the cantilevered truss 2 has a group, which is arranged on the inner side of the steel box girder 1 along the long axis of the steel box girder 1 at intervals; the top of a group of cantilevered trusses 2 is covered with a membrane structure; the inner ring beam 3 is connected to the inner end of a group of cantilevered trusses 2; the drainage structure on the top of the large-span cantilevered roof includes a drainage ditch 4 and a water tank 5; the drainage ditch 4 is arranged in the cantilevered truss 2 near the end of the steel box girder 1, and is gradually inclined downward from the inside to the outside; the outer end of the drainage ditch 4 is connected to the steel box girder 1, and the drainage The inner end of the ditch 4 is connected to the inner ring beam 3, and the two side edges of the ditch 4 are respectively connected to the cantilever truss 2; a horizontal support 6 is arranged at the bottom of the ditch 4, which effectively increases the stability of the ditch 4; a filter plate 7 is arranged in the ditch 4, close to the steel box beam 1; a grate 8 is installed on the top of the ditch 4; the water tank 5 is installed in the steel box beam 1, close to the ditch 4, and one side of the water tank 5 is connected to the water inlet pipe 9, and the other side of the water tank 5 is connected to the water outlet pipe 10; a spraying system is arranged on the top of the roof; the spraying system is connected to the water outlet pipe 10, and the membrane structure is cleaned by the spraying system.
[0021] In this embodiment, the top surface of the membrane structure is provided with a double slope, and the slope surface gradually slopes downward from the middle of the membrane structure to both ends.
[0022] In this embodiment, the cantilever truss 2 is arranged to be gradually inclined downward from the outside to the inside, and the cantilever truss 2 includes an upper chord 2.1, a lower chord 2.2 and a diagonal web 2.3; there are two upper chords 2.1, and the two upper chords 2.1 are arranged in parallel and spaced apart; there is one lower chord 2.2, and the lower chord 2.2 is arranged below the two upper chords 2.1, and is arranged in an isosceles triangle with the two upper chords 2.1; there are two groups of diagonal webs 2.3, which are respectively connected between the two upper chords 2.1 and the lower chord 2.2; the top edges of the two side surfaces of the drainage ditch 4 are respectively fixedly connected to the upper chords 2.1 on both sides; the horizontal support 6 is connected between the diagonal webs 2.3 on both sides, and is supported at the bottom of the drainage ditch 4.
[0023] In this embodiment, a water retaining plate is provided at the top of the upper chord 2.1 on one side of the drainage ditch 4 close to the end of the steel box girder 1 and along the long axis of the upper chord 2.1.
[0024] In this embodiment, the cross-section of the drainage ditch 4 is U-shaped and is made of steel plate. The side plates of the drainage ditch 4 are gradually inclined from bottom to top in a direction away from the central axis of the drainage ditch 4; the top edges of the side plates of the drainage ditch 4 are welded to the corresponding upper chord rod 2.1.
[0025] In this embodiment, the horizontal support 6 includes a cross bar 6.1 and a longitudinal bar 6.2; the cross bar 6.1 has a group and is arranged at intervals along the longitudinal direction, and the two ends of the cross bar 6.1 are correspondingly connected to the diagonal web bars 2.3 on both sides; the longitudinal bars 6.2 have multiple groups, and each group of longitudinal bars 6.2 is connected between adjacent cross bars 6.1.
[0026] In this embodiment, the spraying system includes a water pump 11, a pipe 12, a nozzle 13 and a controller; the pipe 12 is installed on the top of the steel box girder 1, close to one side of a group of cantilever trusses 2, and the pipe 12 is arranged along the long axis of the steel box girder 1; the water pump 11 is arranged between the water outlet pipe 10 and the pipe 12, and water distribution pipes 14 are connected to the pipe 12 at intervals; the nozzle 13 is correspondingly connected to each water distribution pipe 14; a filter is arranged in the water storage tank 5, close to the corresponding water outlet; the controller is electrically connected to the water pump 11, and is used to control the start and stop of the spraying system.
[0027] In this embodiment, the steel box girder 1 is generally arc-shaped, the inner ring beam 3 is generally arc-shaped, and the curvature of the inner ring beam 3 is greater than the curvature of the steel box girder 1; the two ends of the inner ring beam 3 are correspondingly connected to the two ends of the steel box girder 1; the cantilever truss 2 is arranged in the space enclosed by the steel box girder 1 and the inner ring beam 3.
[0028] In this embodiment, the steel box girder 1 is a box-type structure with a large cross-sectional size, and there is a large volume cavity inside the steel box girder 1; the water tank is installed in the cavity of the steel box girder 1.
[0029] In this embodiment, the filter plate 7 is made of a steel plate that is adapted to the cross-sectional shape of the drainage ditch, and water holes are provided at intervals on the surface of the steel plate.
[0030] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The purpose of the above embodiments is to illustrate the utility model rather than to limit the protection scope of the utility model. All applications derived from simple changes of the utility model fall within the protection scope of the utility model.
Claims
1. A drainage structure at the top of a large-span cantilevered roof, arranged on both sides of the roof; the roof comprises a steel box girder (1), a cantilevered truss (2) and an inner ring beam (3); the cantilevered trusses (2) are arranged in a group along the long axis of the steel box girder (1) at intervals on the inner side surface of the steel box girder (1); a membrane structure is covered on the top of the group of cantilevered trusses (2); the inner ring beam (3) is connected to the inner end of the group of cantilevered trusses (2); the characteristics are: The drainage structure at the top of a large-span cantilevered roof comprises a drainage ditch (4) and a water storage tank (5); the drainage ditch (4) is arranged in a cantilevered truss (2) near the end of a steel box beam (1), and is arranged to be gradually inclined downward from the inside to the outside; the outer end of the drainage ditch (4) is connected to the steel box beam (1), the inner end of the drainage ditch (4) is connected to the inner ring beam (3), and the two side edges of the drainage ditch (4) are respectively connected to the cantilevered truss (2); a horizontal support (6) is arranged at the bottom of the drainage ditch (4); A filter plate (7) is arranged inside the steel box girder (4) and close to one side of the steel box girder (1); a grate (8) is installed on the top of the drainage ditch (4); the water storage tank (5) is installed inside the steel box girder (1) and close to the drainage ditch (4), and one side of the water storage tank (5) is connected to a water inlet pipe (9), and the other side of the water storage tank (5) is connected to a water outlet pipe (10); a spraying system is arranged on the top of the roof; the spraying system is connected to the water outlet pipe (10), and the membrane structure is cleaned by the spraying system.
2. The large-span cantilevered roof top drainage structure according to claim 1 is characterized in that: The cantilever truss (2) is arranged to be gradually inclined downward from the outside to the inside, and the cantilever truss (2) comprises an upper chord (2.1), a lower chord (2.2) and an oblique web member (2.3); there are two upper chords (2.1), and the two upper chords (2.1) are arranged in parallel and spaced apart; there is one lower chord (2.2), and the lower chord (2.2) is arranged below the two upper chords (2.1) and forms an isosceles triangle with the two upper chords (2.1); there are two groups of oblique web members (2.3), which are respectively connected between the two upper chords (2.1) and the lower chord (2.2); the top edges of the two side surfaces of the drainage ditch (4) are respectively fixedly connected to the upper chords (2.1) on both sides; the horizontal support (6) is connected between the oblique web members (2.3) on both sides and is supported at the bottom of the drainage ditch (4).
3. The large-span cantilevered roof top drainage structure according to claim 1 is characterized in that: A water retaining plate is provided at the top of the upper chord rod (2.1) on one side of the drainage ditch (4) close to the end of the steel box girder (1) and along the long axis of the upper chord rod (2.1).
4. The large-span cantilevered roof top drainage structure according to claim 1 is characterized in that: The cross section of the drainage ditch (4) is U-shaped and is made of a steel plate; the top edges of the side plates on both sides of the drainage ditch (4) are welded to the corresponding upper chord rods (2.1).
5. The large-span cantilevered roof top drainage structure according to claim 1 is characterized in that: The horizontal support (6) comprises a crossbar (6.1) and a longitudinal bar (6.2); the crossbar (6.1) has a group and is arranged at intervals along the longitudinal direction, and the two ends of the crossbar (6.1) are correspondingly connected to the diagonal web bars (2.3) on both sides; the longitudinal bars (6.2) have a plurality of groups, and each group of longitudinal bars (6.2) is connected between adjacent crossbars (6.1).
6. The large-span cantilevered roof top drainage structure according to claim 1 is characterized in that: The spraying system comprises a water pump (11), a pipe (12), a nozzle (13) and a controller; the pipe (12) is installed on the top of the steel box girder (1) and close to one side of a group of cantilever trusses (2), and the pipe (12) is arranged along the long axis of the steel box girder (1); the water pump (11) is arranged between the water outlet pipe (10) and the pipe (12), and water distribution pipes (14) are connected to the pipe (12) at intervals; the nozzle (13) is connected to each water distribution pipe (14) correspondingly; a filter is arranged in the water storage tank (5) and close to the corresponding water outlet; the controller is electrically connected to the water pump (11) and is used to control the start and stop of the spraying system.