What Does Soldier Pile And Lagging Mean?
Soldier pile and lagging walls are retaining structures used for the purpose of supporting excavation, especially where excavations run deep. Piles made of steel and lagging made of timber are typically used, however caissons, concrete and circular pipes can also be used.
Where lagging is to be permanent, concrete
panels can be used instead of timber. Compared to other types of retaining
walls, soldier pile and lagging walls are inexpensive, easy and quick to install, and allow for
Trenchlesspedia Explains Soldier Pile And Lagging
In this technique, soldier pile is placed by
inserting vertical piles at regular intervals along the planned
location. These piles are either driven into the ground or lowered into an excavation and grouted.
Timber lagging is positioned between the soldier piles as excavation proceeds. The
lagging is able to resist the load exerted by the retained soil by transferring
it to the soldier piles.
For shallow excavations, the walls can be made as cantilever, and for deeper excavations, additional supports in the form of tie-backs, bracing or lateral supports can be provided. However, this system is mostly limited to temporary construction, and is difficult to use in places with a high water table.