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Top-Down Construction Method

32Top-down technology (downward) is the advanced method employed to substructure construction, other than the conventional method (upward).In this method, basement concrete slabs act as lateral bracing for the perimeter wall system. Ground level and first basement slabs are poured, with access holes left to allow excavation beneath. As each subsequent subgrade level is completed, the floors act as lateral bracing for the perimeter wall system.

Working space and construction duration: it is not required a large working space for foundation excavation and saving cost by eliminating to construct the retaining wall. Especially for public transport works as traffic tunnels, this method helps to soon re-established  trafffic road. And the top-down method of construction enables a high-rise superstructure and its sub-basement to be built simultaneously (popularly for civil works have basements) —-> accelerate construction.It is not required of the temporary strutting system (Bracsing System) to support the basement walls during excavation and construction of basement. That is cost-saving for constructiion. Temporary strut system is often very complex problems of space and very expensive construction.

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April 23, 2012 Posted by | Technical Construction | | 1 Comment