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spark000431 · Posted: Fri 12:12, 18 Mar 2011 Post subject: beijing hutong tour

Beijing Olympic National Stadium is situated in the central district of the park south of 29th in 2008 Olympic Games main stadium. The total area of 21 hectares, construction place of 258,000 square meters. Venue seating about 91,000 spectators, including about 11,000 short-lived seats. Held at the Olympic Games and Paralympic Games opening and closing ceremonies, athletics and soccer ultimates. Beijing Olympic Games will be roomy public participation in sports activities and important professional amusements and distraction to enjoy the area,[link widoczny dla zalogowanych], and transform a landmark architecture and the Olympic sports legacy.
Limit of 100 years, launch resistance rating for the class 8 degree earthquake intensity, a class of underground water. Space harness of the main building works were oval, northwardly to south and 333 meters, 294 meters from eastern to west, high 69 meters. The main steel structure of the monster space saddle manner one overall braided steel truss-style "Bird's Nest" structure, the total steel capacity 42,000 tons of steel, concrete stands divided into upper, medium and lower 3 floors underground concrete structure stands a layer 7 floor layer of the reinforced concrete border - shear wall structure. The upper chapter of steel and concrete grandstand entirely torn off and disconnected, the form was enclosed with every other, based on the foundation slab sitting on a connected. National Stadium roof steel structure covered with a twice film structure, namely is fixed in the steel winding between the upper transparent ETFE membrane and nailed beneath the bottom chords of steel structure and the lower inner walls of translucent PTFE acoustic ceiling.
National Stadium at PPP (Private + Public + Partnership) prototype establishing, at the Beijing State-owned Assets Management Co., Ltd. and China CITIC Group, a consortium apt jointly set up the project enterprise, namely responsible as the national stadium financing, construction, operation and treatment of . Commonwealth funded 42% of CITIC, Beijing State-owned Assets Management Co., Ltd. on behalf of the Government because 58% of the funding. CITIC consortium also has 30 annuals after the game franchise. National Stadium for a citizen milestone, the 2008 Olympic Games main stadium, its structural features is significant, the National Stadium intricate. Exist in the chart and construction of many of the characteristics and difficulties: for the main load-bearing roof building components, the largest truss col cross-section of 25m 20m, altitude 67m, unattached specimens of the heaviness of 500 tons. The main truss height of 12m, the highest span of two-Pin via 145.577 +112.788 m, the largest no through truss span 102.391m, the main truss truss columns and large size, massive heaviness monomer.
As the project components are box section bars, so, whether it is between the main structure, or between basic and secondary structure, there is room for multiple wands intersect phenomenon. Combined with sub-structure complex, fewer normal, resulting in the primary structure of the node structure is a complex kind of knot types, manufacture and installation of high accuracy. Large sum of this project, yet the installation time is very short, works on December 24, 2003 begin, completed by the end of 2007, for achievement by the end of March 2008. Tight timetable, with the civilian construction work cross-plane field traction. Project site connecting the segments for welding lifting more than the length of long field weld, plus the thick plate welding, high strength iron 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 position welding and more.
Hoisting the main structure of this project necessitated over the winter and spring time, winter and wet season so there is construction, construction difficult. Hoisting the main structure, the civil 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 transmission routes and large cranes, etc. is very impeded. Meanwhile,[link widoczny dla zalogowanych], the complex structure of this project, the association between lifting segment, must be amassed in series, lifting, otherwise it will arise slowdown phenomenon. The construction side to be well-coordinated, integrated management, engineering unions difficult. To dilute the convergence difficulty, this project will be used in the curtate truss columns spelling, the spelling of the main truss will use the smooth (except for the inner main truss stand to fight), so the gathering after turning over the work must be carried out before lifting.
As component was larger, heavy weight, turning point while the suspension lug choice of settings and laborious, principally the truss column stand, corner approximately and elevating heaving lug in compel while the change ought be thought by the three- force. Meanwhile, the permanence of the process of turning over relatively difficult to control. As the main truss truss segment column and mouth are box section,[link widoczny dla zalogowanych], there are several sub-hoisting pipe butt problem, for the box section, to ensure the precision more than their counterparts in the nozzle, the trouble is mammoth. Lifting, you have to adjust the angle and orientation sub-components, and for large size and weight of the makeup, angle correction is quite tough, lifting difficult.

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]