METHOD FOR PILE-AND-SLAB FOUNDATION CONSTRUCTION IN SEISMIC AREAS Russian patent published in 2007 - IPC E02D27/34 

FIELD: construction, particularly to erect heavy structures on compressible ground in seismic zones.

SUBSTANCE: method involves driving piles; connecting members formed as inversed cups to pile heads; connecting pile heads with slab-like raft. In the case of foundation construction in seismic zones plies having different lengths are used. Long piles are arranged along longitudinal and transversal axes of load-bearing walls. Short piles are driven between main ones. Reinforcement bars of short piles are introduced in raft body for length equal to bolting length necessary to create rigid joints after raft concreting. Before raft concreting members made as inverted cups are put on long pile heads to create gap with thickness equal to half of immersion depth admissible for structural layout of building under construction. Foamed polystyrene layer having thickness equal to gap thickness is formed on upper ends of long piles.

EFFECT: extended technological capabilities due to increased building structure load transferred to structure foundation and be taken by slab and decreased structure immersion.

2 dwg