A modular foundation including plurality of prefabricated concrete modules defining an upper layer of modules including at least one internal passage opening onto at least its upper and lower faces, at least one lower layer of modules on which the upper layer at least partially rests, including at least one internal passage opening onto at least one of its sides and onto at least its upper face, this internal passage communicating at the level of the interface between the upper layer and the lower layer(s) with the internal passage of the upper layer in such a manner as to form at least one global internal passage in the foundation opening onto at least one side and onto at least the upper face of the foundation.

A modular foundation including plurality of prefabricated concrete modules defining an upper layer of modules including at least one internal passage opening onto at least its upper and lower faces, at least one lower layer of modules on which the upper layer at least partially rests, including at least one internal passage opening onto at least one of its sides and onto at least its upper face, this internal passage communicating at the level of the interface between the upper layer and the lower layer(s) with the internal passage of the upper layer in such a manner as to form at least one global internal passage in the foundation opening onto at least one side and onto at least the upper face of the foundation.

A pile shoring wall includes tangent concrete piles that are formed in the ground at an excavation site. The tangent concrete piles include a plurality of a first type of concrete piles in the ground at depths wherein the average depth is d.sub.1 and a plurality of a second type of concrete piles. The second type of concrete piles includes 10% and less than 50% of the tangent concrete piles, and each have a shaft of a helical pile secured therewithin. Each helical pile has a bottom portion with helical flights for screwing the helical pile into the ground, and each helical pile is set into the ground to a depth of at least about 2 m below d.sub.1. The helical flights of each helical pile are exposed to the surrounding soil and increase resistance below an excavation depth when the site is excavated.

A pile shoring wall includes tangent concrete piles that are formed in the ground at an excavation site. The tangent concrete piles include a plurality of a first type of concrete piles in the ground at depths wherein the average depth is d.sub.1 and a plurality of a second type of concrete piles. The second type of concrete piles includes 10% and less than 50% of the tangent concrete piles, and each have a shaft of a helical pile secured therewithin. Each helical pile has a bottom portion with helical flights for screwing the helical pile into the ground, and each helical pile is set into the ground to a depth of at least about 2 m below d.sub.1. The helical flights of each helical pile are exposed to the surrounding soil and increase resistance below an excavation depth when the site is excavated.

A slab filler, and method for implementing fillers in a two-way concrete slab for building structures, are disclosed. The filler comprises an upper keeper tray and a lower keeper tray, and a volumetric filling element. The upper keeper tray is attached to a top of the volumetric filling element and the lower keeper tray is attached to a bottom of the volumetric filling element. The filler comprises a plurality of indicators positioned on all corners of the keeper tray to indicate an amount or level of a concrete fed on the filler. The filler further comprises grooves at an end of the spacer, configured to securely hold one or more belts. Spacers and belts are configured to receive one or more rebar. Further, the volumetric filling element is a high-density material, where the filler is incorporated without upper keeper tray and lower keeper tray.

A mechanically stabilized earth (MSE) wall system that permits water drainage through joints while also preventing undesirable migration of backfill through joints, thus dramatically reducing or eliminating undesirable vegetation by incorporation of a free draining seal (FDS) in panel joints, wherein the FDS structure blocks backfill but permits water migration.

A mechanically stabilized earth (MSE) wall system that permits water drainage through joints while also preventing undesirable migration of backfill through joints, thus dramatically reducing or eliminating undesirable vegetation by incorporation of a free draining seal (FDS) in panel joints, wherein the FDS structure blocks backfill but permits water migration.

Embodiments of the disclosure are directed to cellular sheet pile retaining wall systems with unconnected tail walls, and associated methods of use and manufacture. In one embodiment, a retaining system includes a face wall having a plurality of interconnected face wall sheet piles. The individual face wall sheet piles have a first length and extend a first depth into soil, and the face wall sheet piles form an exterior surface facing an exterior environment. The system also includes a tail wall including a plurality of interconnected tail wall sheet piles extending from the face wall away from the exterior environment. The individual tail wall sheet piles have a second length greater than the first length, and the individual tail sheet wall piles extend a second depth into the soil that is greater than the first depth.

A slab filler, and method for implementing fillers in a two-way concrete slab for building structures, are disclosed. The filler comprises an upper keeper tray and a lower keeper tray, and a volumetric filling element. The upper keeper tray is attached to a top of the volumetric filling element and the lower keeper tray is attached to a bottom of the volumetric filling element. The filler comprises a plurality of indicators positioned on all corners of the keeper tray to indicate an amount or level of a concrete fed on the filler. The filler further comprises grooves at an end of the spacer, configured to securely hold one or more belts. Spacers and belts are configured to receive one or more rebar. Further, the volumetric filling element is a high-density material, where the filler is incorporated without upper keeper tray and lower keeper tray.

A sheet piling filler-corner member includes one or more female couplings for engagement of male couplings of connected sheet pilings, and one or more male coupling members for engagement within female couplings of connected sheet pilings. Selective attachment of sheet pilings using the filler-corner member, and/or modification of the filler-corner member into different configurations allows the filler-corner member to universally function as a spacer or filler for adding length to a sheet piling assembly, as a corner coupling, or as a gender-change adapter between sheet pilings.