Cellular sheet pile retaining systems with unconnected tail walls, and associated methods of use

A retaining system at least partially embedded in soil, the retaining system comprising:

• a face wall including a plurality of face wall sheet piles, wherein individual face wall sheet piles extend to a first depth into the soil, and wherein the face wall sheet piles form an exterior surface facing an exterior environment;
• a first tail wall including a plurality of first tail wall sheet piles connected with and extending from the face wall away from the exterior environment, wherein individual first tail wall sheet piles extend to a second depth into the soil that is below the first depth;
• and
• a second tail wall connected with the first tail wall and including a plurality of second tail wall sheet piles extending from the first tail wall away from the exterior environment, wherein individual of the second tail wall sheet piles extend to a third depth into the soil that is at or below the second depth.

A retaining system at least partially embedded in soil, the retaining system comprising:

• a face wall including a plurality of first sheet piles forming an exterior surface, wherein each of the first sheet piles has a first end portion and wherein individual of the first end portions extends to a first depth within the soil;
• and
• a tail wall extending from the face wall away from the exterior surface, wherein the tail wall includes:
• a plurality of second sheet piles at least partially embedded in the soil, wherein each of the second sheet piles has a second end portion and wherein individual of the second end portions extends to a second depth below the first depth;
• and
• a plurality of third sheet piles at least partially embedded in the soil, wherein each of the third sheet piles has a third end portion and wherein individual of the third end portions extend to a third depth within the soil that is deeper than the first depth.

A method of constructing a retaining wall system, the method comprising:

• partially embedding a plurality of face wall piles in soil such that end portions of individual of the plurality of face wall piles extend to a first depth;
• partially embedding a plurality of first tail wall piles in the soil such that end portions of individual of the plurality of face wall piles extend to second depths below the first depth, wherein the first tail wall piles extend in a direction away from the face wall piles;
• and
• partially embedding a plurality of second tail wall piles in the soil such that end portions of individual of the plurality of second tail wall piles extend to a third depth below the first depth, wherein the second tail wall piles are adjacent to the first tail wall piles and wherein the second tail wall piles extend in a direction away from the face wall piles.