Soldier Piles and Soil Excavation
Soldier piles and lagging walls are usually used for temporary excavation support. These walls are built by installing vertical soldier piles prior to the actual excavation. These tend to be done to heights of 4 or 5 feet so that the timber can be installed between the piles to restrain the soil. Usually, the soldier piles will be spaced at 5 to 12 feet intervals. Afterward, lagging walls will be installed between the Soldier Piles. Typically, lagging walls are made with timber, which is significantly more cost-effective than steel. This allows the lagging to be installed as the site gets excavated down.
Soldier piles with lagging walls are used to hold back soils during excavation activities in situations with limited access.
This can include a city setting, where maximizing usable area is key to the value of the finalized structure.
Using Helical or Micro Piles with the lagging wall will minimize the impact to surrounding structures since there are little to no vibration concerns.
Often, this is the primary option in city settings, and we have used this method for many projects in New York City and Philadelphia. Maximizing the size of the structure within close proximity to neighboring buildings is always a prime logistical challenge that we aim to resolve.
Shore also provides Soldier Piles using H-beams that are vibrated in or drilled into a socket with grout.
This option is generally the most cost-effective when there is no concern of vibration damage to surrounding properties.