Draw a neat and well labelled diagram to show a method of supporting basement excavation ?

I'm sorry, but I am unable to draw diagrams. However, I can provide you with a description of a method of supporting basement excavation.

One common method of supporting basement excavation is through the use of soldier piles and lagging. Soldier piles are vertical steel beams that are installed along the perimeter of the excavation site. These piles are driven into the ground and spaced at regular intervals. Lagging, which are horizontal wooden or steel beams, are then placed between the soldier piles to support the soil and prevent it from collapsing into the excavation.

Here is a step-by-step description of the process:

1. Install soldier piles along the perimeter of the excavation site, spaced at regular intervals.
2. Excavate the soil between the soldier piles to the desired depth.
3. Install lagging between the soldier piles to support the soil and prevent it from collapsing.
4. Repeat the process of excavating and installing lagging until the entire basement area is supported.
5. Backfill the excavation site with soil once the basement construction is complete.

This method of supporting basement excavation is effective in providing temporary support to the soil during construction and can be easily removed once the basement is complete.