Thursday, August 21

The process of how bird's Nest to be build

The engineering of the "Nest" of Beijing Olympics in2008, is completely the crystallization of scientific techniques!The steel structure is one of the hardest parts in the construction of every Olympic venue. A total of 150,000 tons of steel has been used to set up the framework to support these colossal structures. More than 50 of the latest technological achievements were applied in the construction of the Bird's Nest alone. And the use of environmentally-friendly materials and clean energy is one of the focuses.

The workers have overcome tremendous engineering and technical challenges in the process of construction:

1. Difficult work arrangement
They need to do very detailed research of operations and follow meticulous arrangements to complete various kinds of work within a limited workspace.

2. Difficult hoisting of steel parts
To facilitate the assembly of the steel parts, the workers have to use a prone position to assemble the truss columns, which requires a turnover process before they are hoisted. The choice of the hoist points and lug hooks pose great difficulties in the face of bulky and cumbersome steel parts, and the change of pulling stress from three directions must be taken into consideration. The workers need to meticulously rectify angles and positions of the box-typed sectional parts to ensure accurate abutment during the hoisting process.

3. Difficult stabilizing process
They also have to fight the heavy wind load and keep the stability of the steel parts by following a strict working order and use lateral stability measures including the use of anchoring method and wind-holding ropes.

4. Difficult welding
The welders not only face a huge work volume, but also have to work on both the thin steel sheets and thick steel slabs, on high-strength and cast steel elements, and take downward, vertical or overhead positions while welding. They face temperature changes, steel deformation and intensive labor. They need to work above ground, in winter rain and under windy conditions.

5. Difficult installation
The workers face difficulties in ensuring accurate installation as the steel parts and the related gigs and fixtures can be deformed easily under their own dead weight and the change of temperatures. The workers must take pre-installation measures to rectify and relieve the errors that might occur in the process of installation.









The following pictures witness the construction process of bird's Nest:

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