CN104315687A - Stand air conditioner underfloor air supply structure and construction method - Google Patents
Stand air conditioner underfloor air supply structure and construction method Download PDFInfo
- Publication number
- CN104315687A CN104315687A CN201410525022.XA CN201410525022A CN104315687A CN 104315687 A CN104315687 A CN 104315687A CN 201410525022 A CN201410525022 A CN 201410525022A CN 104315687 A CN104315687 A CN 104315687A
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- air
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- grandstand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0227—Ducting arrangements using parts of the building, e.g. air ducts inside the floor, walls or ceiling of a building
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
- E04H3/10—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons for meetings, entertainments, or sports
- E04H3/12—Tribunes, grandstands or terraces for spectators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/08—Installation or apparatus for use in sport halls, e.g. swimming pools, ice rings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a stand air conditioner underfloor air supply structure and a construction method and belongs to the technical field of building sound insulation. The stand air conditioner underfloor air supply structure is used for solving the problem that the traditional large stadium uses the upper air supply way and the energy consumption is big. The stand air conditioner underfloor air supply structure comprises an air cavity, a plurality of ventilation pipes, an air groove and a plurality of air outlets which are sequentially communicated, wherein the air cavity is formed under a stand, the air cavity is communicated with an air conditioner air supply main engine through a pipeline, the ventilation pipes are arranged inside a vertical beam and/or a panel at intervals along the extending direction of the stand, the air groove is formed by the vertical beam, the panel and a surface board of the external structure layer and the ground or the adjacent next level step, the air outlets are formed in the external structure vertical layer, and the air outlets are communicated with the air groove. The stand air condition underfloor air supply structure reduces the air conditioner air supply energy consumption, the air outlets are mild and stable in air supply and have good comfortable degree, and the stand air conditioner underfloor air supply structure is suitable for being used in large space of the large stadium. The stand air conditioner underfloor air supply structure is simple in construction method and shortens the working period.
Description
Technical field
The invention belongs to building technical field of sound isolation, particularly relate to a kind of grandstand air-conditioning ground air-supply structure and construction method.
Background technology
The large stadium buildings such as modern large-scale gymnasium and music hall, the environmental requirement of demand fulfillment comfort and health, namely suitable indoor air temperature, humidity, wind speed and noise criteria etc.But, traditional central air conditioner system adopts the air supply mode of ceiling air-supply (upper air-supply) usually, air-supply air-flow is fully mixed with room air, although indoor humiture can be made so to be spatially substantially evenly distributed, but indoor bleacher area air quality is poor, and air-conditioning system will bear the load in whole space, energy consumption is higher.Therefore, how to provide in a kind of large space being adapted at large stadium and use, the grandstand air-conditioning structure that energy consumption is low and construction method are those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
The grandstand air-conditioning ground air-supply structure that the object of the present invention is to provide a kind of saving space for large stadium, energy consumption low and construction method, adopt to solve traditional large stadium the problem that upper air supply mode energy consumption is large.
To achieve these goals, technical scheme of the present invention is:
A kind of grandstand air-conditioning ground air-supply structure, described grandstand comprises the step that at least two-stage is stairstepping overlap joint, every grade of described step comprises a vertical beam, one panel and external structure layer, described panel is vertically installed in the top of described vertical beam, one end of described panel extends a segment distance in the horizontal direction, the other end of described panel is vertical with the lower end of the described vertical beam in adjacent upper level step to be overlapped, the outside of described panel is provided with described external structure layer, described external structure layer comprises external structure level course connected vertically and external structure founds layer, described external structure is found layer and is arranged at the side of one end of described panel and extends downward on the panel in ground or adjacent next stage step, described external structure level course is arranged at the upper surface of one end of described panel and the described external structure extended horizontally in adjacent upper level step is stood on layer, described grandstand air-conditioning ground air-supply structure comprises the air chamber be communicated with successively, some ventilation ducts, air groove and some air outlets, described air chamber is arranged at the below of described grandstand, described air chamber is communicated with air-conditioning main frame by pipeline, some described ventilation ducts are arranged at intervals in described vertical beam and/or described panel along the bearing of trend of grandstand, panel in described vertical beam, described panel, described external structure layer and ground or adjacent next stage step encloses and forms described air groove, described air outlet is arranged at described external structure and stands in layer, and described air outlet is communicated with described air groove.
Further, described external structure layer comprises the intermediate layer and decorative layer that set gradually from inside to outside, be arranged in the lower edge that intermediate layer that external structure founds layer extends downward described panel, be arranged in the panel that decorative layer that external structure founds layer extends downward ground or adjacent next stage step, described air outlet is arranged at and is arranged in the described decorative layer that described external structure founds layer.
Further, the shape of described air outlet is wedge shape.
Further, the angle β of described air outlet and described panel is 15 °-45 °.
Further, described vertical beam and described panel are all filled out near the side of described air groove and are provided with rock wool.
Further, also comprise air outlet grid, described air outlet grid is arranged at described air outlet one end away from described air groove.
Further, described air groove is wide × and height is 300mm × 300mm.
The construction method of grandstand air-conditioning ground air-supply structure, comprises the steps:
Step one: concreting first order step, and some installation holes are reserved in the described vertical beam or described panel of described first order step;
Step 2: concreting second level step above the first order step described in step one, and some installation holes are reserved in the described vertical beam or described panel of described second level step;
Step 3: repeating said steps two, until the construction completing whole grandstand;
Step 4: after the concrete of described grandstand reaches requirement of strength, the some described ventilation ducts of corresponding installation in some described installation holes;
Step 5: to construct successively from inside to outside described intermediate layer and described decorative layer at the upper surface of the described panel of described step at different levels and side surface respectively, and offer described air outlet on described decorative layer.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, the invention discloses a kind of grandstand air-conditioning ground air-supply structure, grandstand comprises the step that at least two-stage is stairstepping overlap joint, every grade of step comprises a vertical beam, one panel and external structure layer, panel is vertically installed in the top of vertical beam, one end of panel extends a segment distance in the horizontal direction, the other end of panel is vertical with the lower end of the vertical beam in adjacent upper level step to be overlapped, the outside of panel is provided with external structure layer, external structure layer comprises external structure level course connected vertically and external structure founds layer, external structure is found layer and is arranged at the side of one end of panel and extends downward on the panel in ground or adjacent next stage step, external structure level course is arranged at the upper surface of one end of panel and the external structure extended horizontally in adjacent upper level step is stood on layer, grandstand air-conditioning ground air-supply structure comprises the air chamber be communicated with successively, some ventilation ducts, air groove and some air outlets, air chamber is arranged at the below of grandstand, air chamber is communicated with air-conditioning main frame by pipeline, some ventilation ducts are arranged at intervals in vertical beam and/or panel along the bearing of trend of grandstand, panel in vertical beam, panel, external structure layer and ground or adjacent next stage step encloses formation air groove, air outlet is arranged at external structure and stands in layer, and air outlet is communicated with air groove.Adopt grandstand air-conditioning ground air supply mode, air groove is sent to grandstand space outerpace by air outlet after being converged by the air-conditioner wind in each tributary again, thus air-conditioner wind forms uniform temperature and speed in bleacher area, without strong blowing feeling, and blow after avoiding spectators' brain, reach comfortable air-supply effect.And air-conditioner wind is produced by boasting from the air outlet being positioned at step side, be blow from spectators' seat bottom, without the need to bearing the load of whole venue large space, reduce the energy consumption of air-conditioning, improve air-supply efficiency.
2, the construction method of grandstand air-conditioning of the present invention ground air-supply structure, by the reserving installation hole hole when grandstand main structure construction, then when constructing the decorative layer of grandstand again at the reserved interior laying ventilation shaft that installs an air-conditioner, easy and simple to handle, save the engineering time.Meanwhile, scale construction in the large stadium such as gymnasium, music hall can be realized, there is good dissemination.
Accompanying drawing explanation
Grandstand air-conditioning ground air-supply structure of the present invention and construction method are provided by following embodiment and accompanying drawing.
Fig. 1 is the structural representation of the grandstand air-conditioning ground air-supply structure of one embodiment of the invention;
Fig. 2 is the partial enlarged drawing in A portion in Fig. 1.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, grandstand air-conditioning ground air-supply structure of the present invention and construction method are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
The grandstand air-conditioning ground air-supply structure of one embodiment of the invention is described in detail below in conjunction with Fig. 1 and Fig. 2.
Fig. 1 is the side view of the large stadium such as gymnasium or music hall grandstand, and Fig. 2 is the partial enlarged drawing in A portion in Fig. 1.
As shown in Figure 2, grandstand comprises the step that at least two-stage is stairstepping overlap joint, every grade of step comprises a vertical beam 1, one panel 2 and external structure layer (not shown), panel 2 is vertically installed in the top of vertical beam 1, one end of panel 2 extends a segment distance in the horizontal direction, the other end of panel 2 is vertical with the lower end of the vertical beam 1 in adjacent upper level step to be overlapped, the outside of panel 2 is provided with external structure layer, external structure layer comprises external structure level course (not shown) connected vertically and external structure founds layer (not shown), external structure is found layer and is arranged at the side of one end of panel 2 and extends downward on the panel 2 in ground or adjacent next stage step, external structure level course is arranged at the upper surface of one end of panel 2 and the external structure extended horizontally in adjacent upper level step is stood on layer, grandstand air-conditioning ground air-supply structure comprises the air chamber 5 be communicated with successively, some ventilation ducts 6, air groove 7 and some air outlets 8, air chamber 5 is arranged at the below of grandstand, air chamber 5 is communicated with air-conditioning main frame (not shown) by pipeline, some ventilation ducts 6 are arranged at intervals in vertical beam 1 and/or panel 2 along the bearing of trend of grandstand, panel 2 in vertical beam 1, panel 2, external structure layer and ground or adjacent next stage step encloses and forms air groove 7, air outlet 8 is arranged at external structure and stands in layer, and air outlet 8 is communicated with air groove 7.
Continue with reference to figure 2, usually, the large stadium such as stadiums or music hall, space is tall and big, and indoor occupant is concentrated, and when watching program, indoor closed, strict to criteria of noise control.The present embodiment see that tableland air-supply structure can meet aforementioned claim.Specifically, what adopt the present embodiment sees tableland air-supply structure air-supply, first air-conditioner wind enters some air chambers 5 by the pipeline of air-conditioning main frame, because each air chamber 5 is connected with some ventilation ducts 6, thus air-conditioner wind flows through air chamber 5 and enters ventilation duct 6 and form tributary, then the air-conditioner wind in each tributary is each passed through some ventilation ducts 6 and is all pooled to air groove 7, enter grandstand space outerpace finally by the air-conditioner wind converged by the air outlet 8 arranged corresponding to air groove 7, thus reach bleacher area air-supply effect stable gently.That is, in the grandstand of the stairstepping be made up of multi-stage stairs, every one-level step is provided with a row stand seat, is provided with an air groove 7 in the corresponding one-level step often arranging under-seat, the external structure of panel 2 is stood in layer and is set out air port 8, and air outlet 8 is communicated with air groove 7.Because each tributary air-conditioner wind mixes by air groove 7, serve cushioning effect, thus air-conditioner wind forms uniform temperature field and velocity field in bleacher area, without strong blowing feeling, and blow after avoiding spectators' brain, reach comfortable air-supply effect.And the air outlet 8 that air-conditioner wind founds layer from the external structure of the panel 2 being arranged in step side is produced by boasting, be blow from seat bottom, directly air-conditioner wind is delivered to gallery, without the need to bearing the load of whole venue large space, reducing the energy consumption of air-conditioning, improve air-supply efficiency.In addition, carry out table tennis, shuttlecock, basketball, vollyball geometric ratio Games-time in the venues, all have requirement to wind speed size.Adopt grandstand air-conditioning ground air supply mode, the wind speed of air outlet 8, all in the wind speed range of regulation, does not affect various ball game, can meet the environmental requirement of various sports items to competition area.Certainly, in order to save energy as far as possible, can, according to spectators in grandstand distribution situation, adopt multisystem subregion that the air-conditioning of bleacher area is set.
Continue with reference to figure 2, external structure layer comprises the intermediate layer 3 and decorative layer 4 that set gradually from inside to outside, be arranged in the lower edge that intermediate layer 3 that external structure founds layer extends downward panel 2, be arranged in the panel 2 that decorative layer 4 that external structure founds layer extends downward ground or adjacent next stage step, air outlet 8 is arranged at and is arranged in the decorative layer 4 that external structure founds layer.Meanwhile, the decorative layer 4 being arranged in the side surface of panel 2 extends on the panel 2 of next stage step downwards always.
Continue with reference to figure 2, usually, according to the size of air quantity and the structure stress stability of step at different levels, determine the number of ventilation duct 6.Some ventilation ducts 6 independently run through respectively and are arranged in vertical beam 1 or in panel 2.All corresponding with this grade of step air groove 7 arranged of some ventilation ducts 5 of every grade of step is communicated with.Spectators' seat is arranged at the top of panel 2, and panel 2 is unsettled near the side of air outlet 8, and namely panel 2 only has one end stressed, and the other end of panel 2 is set up in vertical beam 1.Therefore in order to meet the stability requirement of panel 2 structure stress, the size of air groove 7 can be chosen as: wide × high is 300mm × 300mm, its length can be consistent with the length of step, or other can meet the appropriate length of air quantity, wind speed and the requirement of ledge structure stability feature.
Continue with reference to figure 2, especially, in order to promote air-conditioner wind air-supply efficiency better, the shape of air outlet 8 is wedge shape.By designing the air outlet 8 of wedge shape, the air draft and produce turbulent flow from bottom to top of the air-conditioner wind that transmitted by air groove 7 can be made, thus reduce the energy consumption of air-conditioner wind, realizing efficiently blowing.Need the size of air-supply according to air force and unit interval, air outlet 8 is 15 °-45 ° with the angle β of panel 2.
Continue with reference to figure 2, in order to meet the sound-insulation noise requirement in space, large-scale place, vertical beam 1 and panel 2 are all filled out near the side of air groove 7 and are provided with rock wool 9.
Continue with reference to figure 2, further, grandstand air-conditioning ground air-supply structure also comprises air outlet grid (not shown), air outlet grid is arranged at air outlet 8 one end away from air groove 7, more stable to blow with making air-conditioner wind, more gently, bring more comfort to spectators.
Continue the construction method describing grandstand air-conditioning of the present invention ground air-supply structure with reference to figure 2 in detail below.
The construction method of grandstand air-conditioning ground air-supply structure, comprises the steps:
Step one: concreting first order step, and some installation holes (not shown) is reserved in the vertical beam 1 or panel 2 of first order step;
Step 2: concreting second level step above the first order step of step one, and some installation holes are reserved in the vertical beam 1 or panel 2 of second level step;
Step 3: repeat step 2, until complete the construction of whole grandstand;
Step 4: after the concrete of grandstand reaches requirement of strength, the some ventilation ducts 6 of corresponding installation in some installation holes;
Step 5: to construct successively from inside to outside intermediate layer 3 and decorative layer 4 at the upper surface of the panel 2 of step at different levels and side surface respectively, and set out air port 8 on decorative layer 4.
Specifically, in grandstand air-conditioning ground air-supply structure construction method, be the reserving installation hole hole when grandstand main structure construction, the interior laying ventilation shaft that installs an air-conditioner then reserved again when constructing the decorative layer of grandstand, easy and simple to handle, save the engineering time.
In sum, in grandstand air-conditioning ground of the present invention air-supply structure, grandstand comprises the step that at least two-stage is stairstepping overlap joint, every grade of step comprises a vertical beam, one panel and external structure layer, panel is vertically installed in the top of vertical beam, one end of panel extends a segment distance in the horizontal direction, the other end of panel is vertical with the lower end of the vertical beam in adjacent upper level step to be overlapped, the outside of panel is provided with external structure layer, external structure layer comprises external structure level course connected vertically and external structure founds layer, external structure is found layer and is arranged at the side of one end of panel and extends downward on the panel in ground or adjacent next stage step, external structure level course is arranged at the upper surface of one end of panel and the external structure extended horizontally in adjacent upper level step is stood on layer, grandstand air-conditioning ground air-supply structure comprises the air chamber be communicated with successively, some ventilation ducts, air groove and some air outlets, air chamber is arranged at the below of grandstand, air chamber is communicated with air-conditioning main frame by pipeline, some ventilation ducts are arranged at intervals in vertical beam and/or panel along the bearing of trend of grandstand, panel in vertical beam, panel, external structure layer and ground or adjacent next stage step encloses formation air groove, air outlet is arranged at external structure and stands in layer, and air outlet is communicated with air groove.Adopt grandstand air-conditioning ground air supply mode, air groove is sent to grandstand space outerpace by air outlet after being converged by the air-conditioner wind in each tributary again, thus air-conditioner wind forms uniform temperature and speed in bleacher area, without strong blowing feeling, and blow after avoiding spectators' brain, reach comfortable air-supply effect.And air-conditioner wind is produced by boasting from the air outlet being positioned at step side, be blow from spectators' seat bottom, without the need to bearing the load of whole venue large space, reduce the energy consumption of air-conditioning, improve air-supply efficiency.In addition, air outlet is wedge-type shape, air-conditioner wind from air outlet out time, air draft from bottom to top, thus the air-supply efficiency that can promote air-conditioner wind further.Establishing rock wool by filling out near the side of air groove at vertical beam and panel, serving the effect reducing air-supply noise.And the construction method of grandstand air-conditioning ground air-supply structure is simple, only need when grandstand main structure construction reserving installation hole hole, easy for installation, shorten the duration.
Foregoing description of the present invention is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention.Any change that those skilled in the art does according to above-mentioned disclosure, modification, all belong to the protection domain of claim.
Claims (8)
1. a grandstand air-conditioning ground air-supply structure, described grandstand comprises the step that at least two-stage is stairstepping overlap joint, every grade of described step comprises a vertical beam, one panel and external structure layer, described panel is vertically installed in the top of described vertical beam, one end of described panel extends a segment distance in the horizontal direction, the other end of described panel is vertical with the lower end of the described vertical beam in adjacent upper level step to be overlapped, the outside of described panel is provided with described external structure layer, described external structure layer comprises external structure level course connected vertically and external structure founds layer, described external structure is found layer and is arranged at the side of one end of described panel and extends downward on the panel in ground or adjacent next stage step, described external structure level course is arranged at the upper surface of one end of described panel and the described external structure extended horizontally in adjacent upper level step is stood on layer, it is characterized in that, described grandstand air-conditioning ground air-supply structure comprises the air chamber be communicated with successively, some ventilation ducts, air groove and some air outlets, described air chamber is arranged at the below of described grandstand, described air chamber is communicated with air-conditioning main frame by pipeline, some described ventilation ducts are arranged at intervals in described vertical beam and/or described panel along the bearing of trend of grandstand, panel in described vertical beam, described panel, described external structure layer and ground or adjacent next stage step encloses and forms described air groove, described air outlet is arranged at described external structure and stands in layer, and described air outlet is communicated with described air groove.
2. grandstand air-conditioning ground as claimed in claim 1 air-supply structure, it is characterized in that, described external structure layer comprises the intermediate layer and decorative layer that set gradually from inside to outside, be arranged in the lower edge that intermediate layer that external structure founds layer extends downward described panel, be arranged in the panel that decorative layer that external structure founds layer extends downward ground or adjacent next stage step, described air outlet is arranged at and is arranged in the described decorative layer that described external structure founds layer.
3. grandstand air-conditioning ground as claimed in claim 1 or 2 air-supply structure, it is characterized in that, the shape of described air outlet is wedge shape.
4. grandstand air-conditioning ground as claimed in claim 3 air-supply structure, it is characterized in that, the angle β of described air outlet and described panel is 15 °-45 °.
5. grandstand air-conditioning ground as claimed in claim 4 air-supply structure, it is characterized in that, described vertical beam and described panel are all filled out near the side of described air groove and are provided with rock wool.
6. grandstand air-conditioning ground as claimed in claim 5 air-supply structure, it is characterized in that, also comprise air outlet grid, described air outlet grid is arranged at described air outlet one end away from described air groove.
7. grandstand air-conditioning ground as claimed in claim 6 air-supply structure, is characterized in that, described air groove wide × height is 300mm × 300mm.
8. the ground of the grandstand air-conditioning as described in any one of claim 1 to 7 construction method of air-supply structure, is characterized in that, comprise the steps:
Step one: concreting first order step, and some installation holes are reserved in the described vertical beam or described panel of described first order step;
Step 2: concreting second level step above the first order step described in step one, and some installation holes are reserved in the described vertical beam or described panel of described second level step;
Step 3: repeating said steps two, until the construction completing whole grandstand;
Step 4: after the concrete of described grandstand reaches requirement of strength, the some described ventilation ducts of corresponding installation in some described installation holes;
Step 5: to construct successively from inside to outside described intermediate layer and described decorative layer at the upper surface of the described panel of described step at different levels and side surface respectively, and offer described air outlet on described decorative layer.
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| CN201410525022.XA CN104315687B (en) | 2014-10-08 | 2014-10-08 | A kind of grandstand air-conditioning ground air-supply structure and construction method |
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| CN201410525022.XA CN104315687B (en) | 2014-10-08 | 2014-10-08 | A kind of grandstand air-conditioning ground air-supply structure and construction method |
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| CN104315687B CN104315687B (en) | 2017-03-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824852A (en) * | 2018-05-29 | 2018-11-16 | 中国建筑第二工程局有限公司 | A kind of large size arc steelframe grandstand space orientation and construction method of installation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2133359C (en) * | 1994-09-30 | 1999-01-12 | Eberhard H. Zeidler | Auditorium air circulation system |
| JP2001108290A (en) * | 1999-10-04 | 2001-04-20 | Takenaka Komuten Co Ltd | Floor structure for spectator seats in tiers |
| JP3304933B2 (en) * | 1999-10-18 | 2002-07-22 | 株式会社大林組 | Outlet device |
| JP2001165496A (en) * | 1999-12-03 | 2001-06-22 | Takenaka Komuten Co Ltd | Chamber for supplying conditioned air to stepwise audience seat |
| CN101498490B (en) * | 2008-01-29 | 2011-05-11 | 中建国际（深圳）设计顾问有限公司 | Air supply system under seat |
| CN204165191U (en) * | 2014-10-08 | 2015-02-18 | 上海建工四建集团有限公司 | A kind of grandstand air-conditioning ground air-supply structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824852A (en) * | 2018-05-29 | 2018-11-16 | 中国建筑第二工程局有限公司 | A kind of large size arc steelframe grandstand space orientation and construction method of installation |
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