Yes, it is generally acceptable to extend ground-level deadmen through the opposite side of a timber wall into the front soil as corresponding support against tilting. This technique is known as "through-wall deadmen" and can be effective in providing additional lateral stability to the timber wall.
Deadmen are horizontal timbers that are buried into the soil behind the retaining wall. They help anchor the wall and prevent it from tilting or leaning forward due to the pressure exerted by the retained soil. By extending the deadmen through the wall and into the front soil, you create a counteracting force that resists the forward movement of the wall.
The process typically involves the following steps:
Digging the Trenches: Dig trenches in the back soil behind the wall to place the deadmen. The depth and length of the trenches depend on the height and design of the wall, as well as the type of soil you are dealing with.
Installing Deadmen: Place the deadmen horizontally in the trenches. Deadmen are usually large, sturdy timbers that extend horizontally into the back soil.
Extending Deadmen: Once the deadmen are securely placed in the back soil, they are extended through the wall and into the front soil. This extension provides the counteracting force to prevent the wall from tilting forward.
Backfilling: After the deadmen are extended through the wall, backfill both sides of the wall with soil, compacting it in layers to ensure stability.
Finishing: Complete the wall construction, making sure the deadmen are securely held in place.
Through-wall deadmen can significantly increase the stability of a timber wall, especially in situations where the wall is under significant pressure from the retained soil. However, it is essential to ensure that the deadmen are appropriately sized and installed at the correct angle to effectively counteract the lateral forces on the wall. Additionally, it is advisable to consult with a structural engineer or a professional with experience in retaining wall construction to ensure the wall is designed and built correctly for the specific site conditions and requirements.