Retaining wall replacement (TIMBER SHEETPILLING)

[Jose Salazar]

I am currently working on replacing a retaining wall made of wood, as it is failing and the wood is in poor condition.

The complication lies on the left side (retained soil), where there is a road that the client does not want to be affected (excavation is not allowed). How can I temporarily retain the soil when removing the retaining wall to ensure that the retained soil does not come loose and cause damage to the road?


Useful info: Timber sheetpiles depth appro. 10ft. backfill silty sand with loose stones, retaining approx. 800ft in legth.

 

[phamENG]

Haven't done it with a retaining wall, but for sheet pile bulkheads on the water it's common to drive new sheet piles outboard of the old and back fill between - usually with a CLSM or slurry. Might be property line issues on land, though.

 

[HTURKAK]

I would prefer permanent PASSIVE ANCHORED Wall ( soil nailing )
Other viable options,
- Anchored wall
- Gravity retaining wall

Check for local availability of alternatives.

 

[Jose Salazar]

Haven't done it with a retaining wall, but for sheet pile bulkheads on the water it's common to drive new sheet piles outboard of the old and back fill between - usually with a CLSM or slurry. Might be property line issues on land, though.

@HTURKAK
The main issue of my case is that the client doesn't want (strongly prefers not to), excavate on the road side and wants to remove the current system, not reinforce it. So if i where to do a soil improvement excavating on the backfill i might endanger the left side.

 

[phamENG]

I'm going to go with can't be done. It's like removing the bearing walls of a house without shoring the roof - the roof will fall in on you.

If they close the road, they may be able to remove the old sheet piling and install new without disturbing the road, but some sort of budget for shoulder repair would be prudent.

 

[phamENG]

Also - use something that will last longer than wood if they have such strict requirements for keeping it operational.