Subterranean structures and methods for constructing subterranean structures

A subterranean structure, comprising:

• a continuous ribbon slab having a plurality of flights fabricated from concrete, the ribbon slab defining periodic openings therein which generally align between adjacent flights, and wherein the flights are separated by a slab interval, the structure further comprising a fill material located in the slab interval.

A subterranean structure, comprising:

• a continuous ribbon slab having a plurality of flights fabricated from concrete, the ribbon slab defining periodic openings therein which generally align between adjacent flights, and wherein the periodic openings which are generally aligned between adjacent flights define a caisson;
• and
• the structure further comprising a plurality of caisson liners, each caisson liner being located within an associated caisson.

The subterranean structure of claim 3-4, and wherein the caisson liners are filled with a fill material.

A subterranean structure, comprising:

• a continuous ribbon slab having a plurality of flights fabricated from concrete, the ribbon slab defining periodic openings therein which generally align between adjacent flights, and wherein the flights are defined by an outer perimeter and an inner perimeter;
• and
• the structure further comprising outer sheet piling located at the outer perimeter of the flights and between adjacent flights.