spark554814
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 Posted: Fri 13:12, 18 Mar 2011 Post subject: Beijing China Tours |
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Beijing Olympic National Stadium is situated in the central area of the park south of 29th in 2008 Olympic Games main stadium. The total area of 21 hectares, construction area of 258,000 square meters. Venue seating almost 91,000 spectators, including almost 11,000 short-lived seats. Held by the Olympic Games and Paralympic Games beginning and closing ceremonies, athletics and soccer finals. Beijing Olympic Games ambition be widespread public participation in sports activities and major professional sports and entertainment to enjoy the place, and chance a milestone structure and the Olympic sports legacy.
Limit of 100 annuals, bombard resistance rating for the level 8 degree earthquake intensity,[link widoczny dla zalogowanych], a level of underground water. Space saddle of the main creating goes were oval, north to south and 333 meters, 294 meters from eastern to west, tall 69 meters. The main iron structure of the mammoth space harness manner one overall braided steel truss-style "Bird's Nest" framework, the absolute steel capability 42,000 tons of steel, concrete stands divided into upper, navel and lower three floors underground concrete framework stands a floor 7 ground ground of the reinforced concrete border - shear walls structure. The upper part of steel and concrete grandstand completely torn off and disconnected, the form was enclosed with each other, based aboard the foundation slab sitting ashore a interlocked. National Stadium dome steel structure covered with a double layer structure, that is fixed in the steel airing between the upper transparent ETFE layer and firm under the bottom chords of steel structure and the lower interior wall of translucent PTFE acoustic dome.
National Stadium by PPP (Private + Public + Partnership) model building, by the Beijing State-owned Assets Management Co., Ltd. and China CITIC Group, a consortium to jointly set up the project corporation, is responsible for the citizen stadium financing, construction, operation and management of . Commonwealth funded 42% of CITIC, Beijing State-owned Assets Management Co., Ltd. on behalf of the Government for 58% of the funding. CITIC consortium also has 30 years after the game franchise. National Stadium for a national landmark, the 2008 Olympic Games main stadium, its structural traits is significant, the National Stadium complex. Exist in the chart and construction of many of the specifics and difficulties: as the main load-bearing roof structure components, the largest truss column cross-section of 25m 20m, elevation 67m, unattached specimens of the weight of 500 tons. The main truss altitude of 12m, the maximum span of two-Pin through 145.577 +112.788 m, the largest not through truss span 102.391m, the main truss truss columns and large size, heavy weight monomer.
As the project components are box section bars, so, whether it is between the main structure,[link widoczny dla zalogowanych], alternatively between basic and secondary structure, there is chamber for multiple rods intersect phenomenon. Combined with sub-structure complex, fewer normal, resulting in the basic structure of the node structure is a complex diversity of node types, manufacture and installation of high precision. Large quantity of this project, but the installation period is very short, works on December 24, 2003 start,[link widoczny dla zalogowanych], completed by the end of 2007, for achievement by the end of March 2008. Tight timetable, with the civil construction work cross-plane field traction. Project site connecting the segments for welding lifting more than the width of long field weld, and the thick panel welding, high strength steel welding, steel welding and so the majority, resulting in a considerable amount of work-site welding, high difficulty, high-altitude welding on the head of location welding and more.
Hoisting the main structure of this project necessitated over the winter and spring period, winter and wet season so there is construction, construction difficult. Hoisting the main structure, the civilian construction is not achieved, site assembly is carried out a large area, so there is the phenomenon of multi-party construction crossover operation. Additionally, on-site venue is small, the construction site layout, component transportation routes and large cranes, etc. is very restricted. Meanwhile, the intricate structure of this project, the association between lifting segment, must be assembled in sequence, lifting, otherwise it will arise slowdown phenomenon. The construction side to be well-coordinated, integrated treatment, engineering unions difficult. To dwindle the gathering difficulty, this project will be accustom in the horizontal truss columns spelling, the spelling of the main truss will use the smooth (except for the inner main truss stand to fight), so the convergence behind turning over the work must be carried out before lifting.
As makeup was larger, cumbersome weight, turning point when the suspension lug alternative of settings and complicated, principally the truss column stand, turn approximately and elevating heaving lug in compel while the alteration should be considered by the three- force. Meanwhile, the permanence of the process of turning over relatively difficult apt control. As the cardinal truss truss segment col and mouth are box partition, there are several sub-hoisting pipe butt problem, for the carton section, apt ensure the accuracy more than their counterparts in the nozzle, the difficulty is huge. Lifting, you must modify the angle and orientation sub-components, and because great size and heaviness of the makeup, angle adjustment is very tough, elevating heaving difficult.
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
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