LFI provides services such as Secant Pile Walls, Tangent Pile Walls, Soldier Beams and Wood Lagging Walls, and Soil Nail Walls. Earth Retention Systems are employed when adjacent structures, roads, buildings, and utilities need to be supported during ongoing construction. These systems can be either structurally permanent to remain in place or short-term based upon the final construction specifications.

Soil Nail Walls are frequently used when vibration-free foundation installations are deemed mandatory, such as excavating next to existing structures. These walls are installed in a continuous excavation method, vertical cuts are made in the ground, holes are drilled for the nails, soil nail tendons are installed and grouted, a shotcrete layer is applied and bearing plates and nuts are attached. This process is repeated until the finished elevation is met.

Secant/Tangent Pile Walls are similar systems, where piles are installed along the perimeter of the excavation. Tangent Pile Walls are constructed by installing a row of adjacent piles with 1”-2” between each pile. Secant Pile Walls are similar, however the piles interlock with each other. This technique of earth retention not only allows for a broad degree of flexibility, it provides a structurally sound wall which minimizes the settlement of the neighboring structures.

Soldier Pile Walls consist of steel soldier beams that are placed into a vertical shaft. Then the area is excavated in a series of lifts and timber lagging or shotcrete is installed. Depending on the depth of excavation, these walls can either be cantilevered or supported with tiebacks.

LFI HAPPILY SERVES THE MIDWEST, AND WE’RE COMMITTED TO SAFETY AND KNOWLEDGEABLE ABOUT BOTH NEW AND TRUSTED PRACTICES.