Abstract: The theory of interaction between superstructure and foundation including pile foundation how to be extended to the up-down construction method is expounded in detail. With this program, the force and deformation in the diaphragm wall, slab and mid-post pile at the different stages of consruction and raft or box foundation before and after pouring of concrete can be computed. The load-sharing between piles and diaphragm wall can be also computed. And then, a 238m high and 60-storey super-tall building with 10-storey podium, excavation depth of 18.75-24.00 m and area of 22 000 m2 is taken for example to compute the force and deformation at the different stages of up-down construction. The comparison of deformation between the monitoring and computed results demonstrates the feasiability and reasonableness of interaction theory presented here. Evidently, this theory can provide a good condition for improving the design and construction level.

Key words: up-down construction method, deep excavation engineering, interaction